Low coefficient of friction ethylene-based compositions

Abstract

The present disclosure provides a composition containing a polymeric blend. The polymeric blend contains (A) from 50 wt % to 90 wt % of a first ethylene-based polymer having a density from 0.895 g/cc to 0.905 g/cc; and a melt index from 0.1 g/10 min to 50 g/10 min; (B) from 8 wt % to 48 wt % of a second ethylene-based polymer having a density from 0.935 g/cc to 0.967 g/cc; and a melt index from 0.1 g/10 min to 180 g/10 min; and from 0.01 wt % to 2.0 wt % of a slip agent, based on the total weight of the polymeric blend. The polymeric blend has (i) an overall density from 0.900 g/cc to 0.925 g/cc; and (ii) a coefficient of friction (COF) after aging for 1 week at 60° C. from 0.001 to 0.400. The present disclosure also provides a multilayer film with a first layer containing the composition.

Claims

1. A composition comprising: a polymeric blend comprising (A) from 50 wt % to 90 wt % of a first ethylene-based polymer having a density from 0.895 g/cc to 0.905 g/cc; and a melt index from 0.1 g/10 min to 50 g/10 min; (B) from 8 wt % to 48 wt % of a second ethylene-based polymer having a density from 0.935 g/cc to 0.967 g/cc; and a melt index from 0.1 g/10 min to 180 g/10 min; (C) from 0.01 wt % to 2.0 wt % of a slip agent, based on the total weight of the polymeric blend; the polymeric blend having (i) an overall density from 0.900 g/cc to 0.925 g/cc; and (ii) a coefficient of friction (COF) after aging for 1 week at 60° C. from 0.001 to 0.400.

2. The composition of claim 1, wherein the polymeric blend has a difference between the density of the first ethylene-based polymer and the density of the second ethylene-based polymer (Δ Density) from 0.039 g/cc to 0.065 g/cc.

3. The composition of claim 1, wherein the polymeric blend has a difference between the melt index of the first ethylene-based polymer and the melt index of the second ethylene-based polymer (Δ MI) from 0 g/10 min to 155 g/10 min.

4. The composition of claim 1, wherein the slip agent is selected from the group consisting of a fatty acid amide, a silicone, and combinations thereof.

5. The composition of claim 1, wherein the slip agent is a fatty acid amide.

6. The composition of claim 1, wherein the first ethylene-based polymer is an ethylene/octene copolymer having a density from 0.897 g/cc to 0.902 g/cc, and the second ethylene-based polymer is an ethylene/octene copolymer having a density from 0.942 g/cc to 0.958 g/cc.

7. The composition of claim 1, wherein the polymeric blend comprises: (A) from 50 wt % to 85 wt % of the first ethylene-based polymer, the first ethylene-based polymer having a density from 0.897 g/cc to 0.902 g/cc; (B) from 8 wt % to 30 wt % of the second ethylene-based polymer, the second ethylene-based polymer having a density from 0.942 g/cc to 0.958 g/cc; (C) from 0.01 wt % to 2.0 wt % erucamide; and the overall density of the polymeric blend is from 0.905 g/cc to 0.920 g/cc.

8. A multilayer film comprising a first layer comprising the composition of claim 1.

9. The multilayer film of claim 8, wherein the first layer has a coefficient of friction (COF) after aging for 1 week at 60° C. from 0.050 to 0.400.

10. The multilayer film of claim 8, wherein the first layer has an initial COF from 0.001 to 0.400.

11. The multilayer film of claim 8, wherein the first layer has an initial surface roughness from 10 nm to 40 nm.

12. The multilayer film of claim 8, wherein the first layer has a surface roughness after aging for 1 week at 60° C. from 10 nm to 45 nm.

13. The multilayer film of claim 8, wherein the first layer has a light transmission from 90% to 100% and a haze from 0.5% to 30%.

14. The multilayer film of claim 8, wherein the first layer is a seal layer.

15. The composition of claim 2 wherein the composition has an initial coefficient of friction from 0.001 to 0.200.

16. A composition comprising: a polymeric blend comprising (A) from 50 wt % to 90 wt % of a first ethylene-based polymer having a density from 0.895 g/cc to 0.905 g/cc; and a melt index from 0.1 g/10 min to 50 g/10 min; (B) from 8 wt % to 48 wt % of a second ethylene-based polymer having a density from 0.935 g/cc to 0.967 g/cc; and a melt index from 0.1 g/10 min to 180 g/10 min; (C) from 0.01 wt % to 2.0 wt % of a slip agent, based on the total weight of the polymeric blend; the polymeric blend having (i) an overall density from 0.900 g/cc to 0.925 g/cc; (ii) a difference between the density of the first ethylene-based polymer and the density of the second ethylene-based polymer (Δ Density) from 0.039 g/cc to 0.065 g/cc; (iii) an initial coefficient of friction from 0.001 to 0.200; and (iv) a coefficient of friction (COF) after aging for 1 week at 60° C. from 0.001 to 0.400.

17. The composition of claim 16 comprising 0.01 wt % to 1.0 wt % of the slip agent that is a fatty acid amide.

18. The composition of claim 17 wherein the polymeric blend has a difference between the melt index of the first ethylene-based polymer and the melt index of the second ethylene-based polymer (Δ MI) from 0 g/10 min to 155 g/10 min.

19. A multilayer film comprising a first layer comprising the composition of claim 18, the first layer having a heat seal initiation temperature from 65° C. to 85° C.

20. The multilayer film of claim 19, wherein the first layer has a surface roughness after aging for 1 week at 60° C. from 10 nm to 45 nm.

Description

DETAILED DESCRIPTION

(1) The present disclosure provides a composition. In an embodiment, the composition includes a polymeric blend containing (A) from 50 wt % to 90 wt % of a first ethylene-based polymer having a density from 0.895 g/cc to 0.905 g/cc, and a melt index from 0.1 g/10 min to 50 g/10 min; (B) from 8 wt % to 48 wt % of a second ethylene-based polymer having a density from 0.935 g/cc to 0.967 g/cc, and a melt index from 0.1 g/10 min to 180 g/10 min; and (C) from 0.01 wt % to 2.0 wt % of a slip agent, based on the total weight of the polymeric blend. The polymeric blend has (i) an overall density from 0.900 g/cc to 0.925 g/cc and (ii) a coefficient of friction (COF) after aging for 1 week at 60° C. from 0.001 to 0.400.

(2) A. First Ethylene-Based Polymer

(3) The polymeric blend contains a first ethylene-based polymer. The first ethylene-based polymer has a density from 0.895 g/cc to 0.905 g/cc, and a melt index from 0.1 g/10 min to 50 g/10 min.

(4) Nonlimiting examples of suitable first ethylene-based polymer (polyethylene) include ethylene-based plastomers/elastomers, multi-component ethylene-based copolymer (EPE), ultra low density polyethylene (ULDPE), very low density polyethylene (VLDPE), and combinations thereof. In an embodiment, the first ethylene-based polymer is an ethylene-based plastomer/elastomer. In another embodiment, the first ethylene-based polymer is an ethylene-based plastomer/elastomer that is an ethylene/C.sub.3-C.sub.10 α-olefin copolymer, or an ethylene/C.sub.4-C.sub.8 α-olefin copolymer, or an ethylene/C.sub.6-C.sub.8 α-olefin copolymer, or an ethylene/octene copolymer.

(5) In an embodiment, the first ethylene-based polymer includes from greater than 50 wt %, or 55 wt %, or 60 wt %, or 65 wt % to 70 wt %, or 75 wt %, or 80 wt %, or 85 wt %, or 90 wt %, or 95 wt %, or 97 wt %, or 99 wt %, or 100 wt % units derived from ethylene and a reciprocal amount, or from 0 wt %, or 1 wt %, or 3 wt %, or 5 wt %, or 10 wt %, or 15 wt %, or 20 wt %, or 25 wt %, or 30 wt % to 35 wt %, or 40 wt %, or 45 wt %, or less than 50 wt % units derived from a comonomer, based on the total weight of the first ethylene-based polymer.

(6) In an embodiment, the first ethylene-based polymer has a density from 0.895 g/cc, or 0.894 g/cc, or 0.897 g/cc to 0.902 g/cc, or 0.903 g/cc, or 0.904 g/cc, or 0.905 g/cc.

(7) In an embodiment, the first ethylene-based polymer has a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 3.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min, or 15 g/10 min, or 20 g/10 min, or 25 g/10 min, or 30 g/10 min, or 35 g/10 min, or 40 g/10 min, or 45 g/10 min, or 50 g/10 min.

(8) In an embodiment, the first ethylene-based polymer has a melting temperature (T.sub.m) from greater than 60° C., or 65° C., or 70° C., or 75° C., or 80° C., or 85° C., or 90° C., or 95° C. to 100° C., or 105° C., or 110° C., or 120° C.

(9) In an embodiment, the first ethylene-based polymer has: (i) a density from 0.895 g/cc, or 0.894 g/cc, or 0.897 g/cc to 0.902 g/cc, or 0.903 g/cc, or 0.904 g/cc, or 0.905 g/cc; and (ii) a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 3.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min.

(10) In an embodiment, the first ethylene-based polymer is an ethylene-based plastomer/elastomer that is an ethylene/C.sub.3-C.sub.10 α-olefin copolymer, or an ethylene/C.sub.4-C.sub.8 α-olefin copolymer, or an ethylene/C.sub.6-C.sub.8 α-olefin copolymer, or an ethylene/octene copolymer, and the first ethylene-based polymer has: (i) a density from 0.895 g/cc, or 0.894 g/cc, or 0.897 g/cc to 0.902 g/cc, or 0.903 g/cc, or 0.904 g/cc, or 0.905 g/cc; and (ii) a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 3.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min.

(11) In a further embodiment, the ethylene-based plastomer/elastomer has one or both of the following properties: (iv) a melting temperature (Tm) from 80° C., or 85° C., or 90° C., or 95° C. to 100° C., or 105° C., or 110° C., or 120° C.; and/or (v) from greater than 50 wt %, or 55 wt %, or 60 wt %, or 65 wt % to 70 wt %, or 75 wt %, or 80 wt %, or 85 wt %, or 90 wt %, or 95 wt %, or 97 wt %, or 99 wt %, or 100 wt % units derived from ethylene and a reciprocal amount, or from 0 wt %, or 1 wt %, or 3 wt %, or 5 wt %, or 10 wt %, or 15 wt %, or 20 wt %, or 25 wt %, or 30 wt % to 35 wt %, or 40 wt %, or 45 wt %, or less than 50 wt % units derived from a comonomer, based on the total weight of the first ethylene-based polymer.

(12) In an embodiment, the first ethylene-based polymer is an ethylene/octene copolymer with a density of 0.902 g/cc; a melt index of 1.0 g/10 min; and a melting temperature (Tm) of 99° C. In a further embodiment, the ethylene-based polymer is AFFINITY™ PL 1880G, available from The Dow Chemical Company.

(13) In an embodiment, the first ethylene-based polymer is an ethylene/octene copolymer with a density of 0.897 g/cc; a melt index of 1.6 g/10 min; and a melting temperature (Tm) of 96.1° C. In a further embodiment, the ethylene-based polymer is AFFINITY™ PF 1140G, available from The Dow Chemical Company.

(14) In an embodiment, the polymeric blend contains from 50 wt %, or 55 wt %, or 60 wt %, or 65 wt %, or 70 wt %, or 75 wt % to 80 wt %, or 85 wt %, or 90 wt % of the first ethylene-based polymer, based on the total weight of the polymeric blend.

(15) In an embodiment, the composition contains from 50 wt %, or 55 wt %, or 60 wt %, or 65 wt %, or 70 wt %, or 75 wt % to 80 wt %, or 85 wt %, or 90 wt % of the first ethylene-based polymer, based on the total weight of the composition.

(16) The first ethylene-based polymer may comprise two or more embodiments disclosed herein.

(17) B. Second Ethylene-Based Polymer

(18) The polymeric blend contains a second ethylene-based polymer. The second ethylene-based polymer has a density from 0.935 g/cc to 0.967 g/cc and a melt index from 0.1 g/10 min to 180 g/10 min.

(19) The second ethylene-based polymer is different than the first ethylene-based polymer because the second ethylene-based polymer and the first ethylene-based polymer have different densities. Specifically, the density of the first ethylene-based polymer (0.895-0.905 g/cc) is less than the density of the second ethylene-based polymer (0.935-0.967 g/cc).

(20) Nonlimiting examples of suitable second ethylene-based polymer (polyethylene) include high density polyethylene (HDPE), medium density polyethylene (MDPE), multi-component ethylene-based copolymer (EPE), and combinations thereof. In another embodiment, the second ethylene-based polymer is an ethylene/C.sub.3-C.sub.10 α-olefin copolymer, or an ethylene/C.sub.4-C.sub.8 α-olefin copolymer, or an ethylene/C.sub.6-C.sub.8 α-olefin copolymer, or an ethylene/octene copolymer.

(21) In an embodiment, the second ethylene-based polymer includes from greater than 50 wt %, or 55 wt %, or 60 wt %, or 65 wt % to 70 wt %, or 75 wt %, or 80 wt %, or 85 wt %, or 90 wt %, or 95 wt %, or 97 wt %, or 99 wt %, or 100 wt % units derived from ethylene and a reciprocal amount, or from 0 wt %, or 1 wt %, or 3 wt %, or 5 wt %, or 10 wt %, or 15 wt %, or 20 wt %, or 25 wt %, or 30 wt % to 35 wt %, or 40 wt %, or 45 wt %, or less than 50 wt % units derived from a comonomer, based on the total weight of the second ethylene-based polymer.

(22) In an embodiment, the second ethylene-based polymer has a density from 0.935 g/cc, or 0.940 g/cc, 0.941 g/cc, or 0.942 g/cc to 0.950 g/cc, or 0.955 g/cc, or 0.957 g/cc, or 0.958 g/cc, or 0.959 g/cc, or 0.960 g/cc, or 0.965 g/cc, or 0.967 g/cc.

(23) In an embodiment, the second ethylene-based polymer has a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min, or 15 g/10 min, or 20 g/10 min, or 25 g/10 min, or 30 g/10 min, or 35 g/10 min, or 40 g/10 min, or 45 g/10 min, or 50 g/10 min, or 60 g/10 min, or 70 g/10 min, or 80 g/10 min, or 90 g/10 min, or 100 g/10 min, or 110 g/10 min, or 120 g/10 min, or 130 g/10 min, or 140 g/10 min, or 150 g/10 min, or 160 g/10 min, or 170 g/10 min, or 180 g/10 min.

(24) In an embodiment, the second ethylene-based polymer has a melting temperature (T.sub.m) from 100° C., or 105° C., or 110° C., or 115° C., or 117° C., or 120° C. to 125° C., or 130° C., or 134° C., or 135° C., or 140° C., or 150° C., or 160° C., or 165° C.

(25) In an embodiment, the second ethylene-based polymer has: (i) a density from 0.935 g/cc, or 0.940 g/cc, 0.941 g/cc, or 0.942 g/cc to 0.950 g/cc, or 0.955 g/cc, or 0.957 g/cc, or 0.958 g/cc, or 0.959 g/cc, or 0.960 g/cc, or 0.965 g/cc, or 0.967 g/cc; and (ii) a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min, or 15 g/10 min, or 20 g/10 min, or 25 g/10 min, or 30 g/10 min, or 35 g/10 min, or 40 g/10 min, or 45 g/10 min, or 50 g/10 min, or 60 g/10 min, or 70 g/10 min, or 80 g/10 min, or 90 g/10 min, or 100 g/10 min, or 110 g/10 min, or 120 g/10 min, or 130 g/10 min, or 140 g/10 min, or 150 g/10 min, or 160 g/10 min.

(26) In an embodiment, the second ethylene-based polymer is an ethylene/C.sub.3-C.sub.10 α-olefin copolymer, or an ethylene/C.sub.4-C.sub.8 α-olefin copolymer, or an ethylene/C.sub.6-C.sub.8 α-olefin copolymer, or an ethylene/octene copolymer, and the second ethylene-based polymer has: (i) a density from 0. 0.935 g/cc, or 0.940 g/cc, 0.941 g/cc, or 0.942 g/cc to 0.950 g/cc, or 0.955 g/cc, or 0.957 g/cc, or 0.958 g/cc, or 0.959 g/cc, or 0.960 g/cc, or 0.965 g/cc, or 0.967 g/cc; and (ii) a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min, or 15 g/10 min, or 20 g/10 min, or 25 g/10 min, or 30 g/10 min, or 35 g/10 min, or 40 g/10 min, or 45 g/10 min, or 50 g/10 min, or 60 g/10 min, or 70 g/10 min, or 80 g/10 min, or 90 g/10 min, or 100 g/10 min, or 110 g/10 min, or 120 g/10 min, or 130 g/10 min, or 140 g/10 min, or 150 g/10 min, or 160 g/10 min.

(27) In a further embodiment, the second ethylene-based polymer has one or both of the following properties: (iv) a melting temperature (Tm) from 110° C., or 115° C., or 117° C., or 120° C. to 125° C., or 130° C., or 134° C., or 135° C., or 140° C., or 150° C., or 160° C., or 165° C.; and/or (iv) from greater than 50 wt %, or 55 wt %, or 60 wt %, or 65 wt % to 70 wt %, or 75 wt %, or 80 wt %, or 85 wt %, or 90 wt %, or 95 wt %, or 97 wt %, or 99 wt %, or 100 wt % units derived from ethylene and a reciprocal amount, or from 0 wt %, or 1 wt %, or 3 wt %, or 5 wt %, or 10 wt %, or 15 wt %, or 20 wt %, or 25 wt %, or 30 wt % to 35 wt %, or 40 wt %, or 45 wt %, or less than 50 wt % units derived from a comonomer, based on the total weight of the second ethylene-based polymer.

(28) In an embodiment, the polymeric blend contains from 8 wt %, or 10 wt %, or 15 wt % to 20 wt %, or 25 wt %, or 30 wt %, or 35 wt %, or 40 wt %, or 45 wt %, or 48 wt % of the second ethylene-based polymer, based on the total weight of the polymeric blend.

(29) In an embodiment, the composition contains from 8 wt %, or 10 wt %, or 15 wt % to 20 wt %, or 25 wt %, or 30 wt %, or 35 wt %, or 40 wt %, or 45 wt %, or 48 wt % of the second ethylene-based polymer, based on the total weight of the composition.

(30) The second ethylene-based polymer may comprise two or more embodiments disclosed herein.

(31) C. Slip Agent

(32) The polymeric blend contains a slip agent. A “slip agent” is an additive that reduces the coefficient of friction (COF) of a blend, of a composition, or of a layer.

(33) Nonlimiting examples of suitable slip agents include fatty acid amides, silicone, plasticizers, organic amines, dibasic esters, stearates, sulfates, fatty acids, mineral oil, vegetable oils, fluorinated organic resins, graphite, tungsten disulfide, molybdenum disulfide, and combinations thereof.

(34) In an embodiment, the slip agent is a fatty acid amide. A “fatty acid amide” is a molecule having the Structure (I):

(35) ##STR00001##
wherein R is a C.sub.3 to C.sub.27 alkyl moiety. In an embodiment, R is a C.sub.11 to C.sub.25, or a C.sub.15 to C.sub.23 alkyl moiety. In another embodiment, R is a C.sub.21 alkyl moiety. R can be saturated, mono-unsaturated, or poly-unsaturated. In an embodiment, R is mono-unsaturated. Nonlimiting examples of suitable fatty acid amides include erucamide, oleamide, palmitamide, stearamide, and behenamide. Additionally, the fatty acid amide can be a mixture of two or more fatty acid amides. In an embodiment, the fatty acid amide is erucamide.

(36) In an embodiment, the slip agent is a silicone. A “silicone” is a polymer generally comprising siloxane-based monomer residue repeating units. A “siloxane” is a monomer residue repeat unit having the Structure (II):

(37) ##STR00002##
wherein R.sup.1 and R.sup.2 each independently is hydrogen or a hydrocarbyl group. A “hydrocarbyl group” is a univalent group formed by removing a hydrogen atom from a hydrocarbon (e.g., alkyl groups, such as ethyl, or aryl groups, such as phenyl). The siloxane monomer residue can be any dialkyl, diaryl, dialkaryl, or diaralkyl siloxane, having the same or differing alkyl, aryl, alkaryl, or aralkyl moieties. In an embodiment, each of R.sup.1 and R.sup.2 is independently a C.sub.1 to C.sub.20, or C.sub.1 to C.sub.12, or C.sub.1 to C.sub.6 alkyl, aryl, alkaryl, or aralkyl moiety. R.sup.1 and R.sup.2 can have the same or a different number of carbon atoms. In an embodiment, the hydrocarbyl group for each of R.sup.1 and R.sup.2 is an alkyl group that is saturated and optionally straight-chain. The alkyl group can be the same or can be different for each of R.sup.1 and R.sup.2. Non-limiting examples of alkyl groups suitable for use in R.sup.1 and R.sup.2 include methyl, ethyl, 1-propyl, 2-propyl, 1-butyl, isobutyl, t-butyl, or combinations of two or more thereof. Nonlimiting examples of suitable silicone include polydimethylsiloxane (PDMS), poly(ethyl-methylsiloxane), and combinations thereof.

(38) In another embodiment, the slip agent excludes silicones. In a further embodiment, the slip agent excludes PDMS.

(39) In an embodiment, the slip agent is a stearate. Nonlimiting examples of suitable stearates include zinc stearate, lead stearate, calcium stearate, and combinations thereof.

(40) In an embodiment, the slip agent is a sulfate. A nonlimiting example of a suitable sulfate is zinc sulfate.

(41) In an embodiment, the slip agent is a fatty acid. Nonlimiting examples of suitable fatty acids include palmitic acid, stearic acid, and combinations thereof.

(42) In an embodiment, the slip agent is a fluorinated organic resin. A “fluorinated organic resin” is a polymer of one or more fluorinated monomers selected from tetrafloroethylene, vinylidene fluoride, and chlorotrifluoroethylene.

(43) In an embodiment, the polymeric blend contains from 100 ppm, or 150 ppm, or 200 ppm, or 250 ppm, or 500 ppm to 1000 ppm, or 1500 ppm, or 2000 ppm, or 2500 ppm slip agent.

(44) In an embodiment, the composition contains from 100 ppm, or 150 ppm, or 200 ppm, or 250, or 500 ppm to 1000 ppm, or 1500 ppm, or 2000 ppm, or 2500 ppm slip agent.

(45) In an embodiment, the polymeric blend contains 0.01 wt %, or 0.02 wt %, or 0.05 wt % to 0.1 wt %, or 0.15 wt %, or 0.20 wt %, or 0.25 wt %, or 0.50 wt %, or 1.0 wt %, or 1.5 wt %, or 2.0 wt % slip agent, based on the total weight of the polymeric blend.

(46) In an embodiment, the composition contains from 0.01 wt %, or 0.02 wt %, or 0.05 wt % to 0.1 wt %, or 0.15 wt %, or 0.20 wt %, or 0.25 wt %, or 0.50 wt %, or 1.0 wt %, or 1.5 wt %, or 2.0 wt % slip agent, based on the total weight of the composition.

(47) The slip agent may comprise two or more embodiments disclosed herein.

(48) D. Optional Additives

(49) In an embodiment, the polymeric blend includes an optional additive. Nonlimiting examples of suitable additives include antioxidants, anti-blocking agents, stabilizing agents, colorants, ultra violet (UV) absorbers or stabilizers, flame retardants, compatibilizers, plasticizers, fillers, processing aids, and combinations thereof.

(50) In an embodiment, the polymeric blend includes an antioxidant. Nonlimiting examples of suitable antioxidants include phenolic antioxidants, thio-based antioxidants, phosphate-based antioxidants, and hydrazine-based metal deactivators. In a further embodiment, the polymeric blend includes an antioxidant, such as IRGANOX 1035, present in an amount from 0.1 wt %, or 0.2 wt % to 0.3 wt %, based on the total weight of the polymeric blend. In a further embodiment, the composition includes an antioxidant in an amount from 0.1 wt %, or 0.2 wt % to 0.3 wt %, based on the total weight of the composition.

(51) In an embodiment, the polymeric blend includes a stabilizing agent. Nonlimiting examples of suitable stabilizing agents include polyethylene glycol, ethylene glycol-propylene glycol block copolymers, molecules (including polymers) containing one or more hydroxyl groups, molecules (including polymers) containing one or more carboxylic acid groups, molecules (including polymers) containing one or more ester groups, and combinations thereof. In a further embodiment, the polymeric blend includes a stabilizing agent, such as polyethylene glycol, present in an amount from 0.1 wt %, or 0.2 wt % to 0.3 wt %, or 1 wt %, or 3.0 wt %, or 5 wt %, based on the total weight of the polymeric blend. In a further embodiment, the composition includes a stabilizing agent in an amount from 0.1 wt %, or 0.2 wt % to 0.3 wt %, or 1 wt %, or 3.0 wt %, or 5 wt %, based on the total weight of the composition.

(52) The additive may comprise two or more embodiments disclosed herein.

(53) E. Composition

(54) The composition includes a polymeric blend containing (A) from 50 wt % to 90 wt % of a first ethylene-based polymer having a density from 0.895 g/cc to 0.905 g/cc, and a melt index from 0.1 g/10 min to 50 g/10 min; (B) from 8 wt % to 48 wt % of a second ethylene-based polymer having a density from 0.935 g/cc to 0.967 g/cc, and a melt index from 0.1 g/10 min to 180 g/10 min; (C) from 0.01 wt % to 2.0 wt % of a slip agent, based on the total weight of the polymeric blend; and, optionally, (D) an additive. The polymeric blend has (i) an overall density from 0.900 g/cc to 0.925 g/cc and (ii) a coefficient of friction (COF) after aging for 1 week at 60° C. from 0.001 to 0.400.

(55) In an embodiment, the composition includes a polymeric blend consisting essentially of, or consisting of (A) the first ethylene-based polymer; (B) the second ethylene-based polymer; (C) the slip agent; and, optionally, (D) an additive.

(56) In an embodiment, the polymeric blend has an overall density from 0.900 g/cc, or 0.905 g/cc, or 0.908 g/cc to 0.910 g/cc, or 0.915 g/cc, or 09.20 g/cc, or 0.925 g/cc.

(57) In an embodiment, the polymeric blend has an overall melt index from 0.1 g/10 min, or 0.5 g/10 min to 3 g/10 min, or 5 g/10 min.

(58) In an embodiment, the polymeric blend has an initial COF from 0.001, or 0.050, or 0.090 to 0.100, or 0.110, or 0.140, or 0.150, or 0.152, or 0.160, or 0.170, or 0.180, or 0.190, or 0.200.

(59) In an embodiment, the polymeric blend has a COF after aging for 1 week at 60° C. from 0.001, or 0.050, or 0.100 to 0.250, or 0.300, or 0.330, or 0.360, or 0.397, or 0.398, or 0.399, or 0.400.

(60) In an embodiment, the polymeric blend has a Δ Density from 0.039 g/cc, or 0.040 g/cc to 0.061 g/cc, or 0.062 g/cc, or 0.063 g/cc, or 0.064 g/cc, or 0.065 g/cc. The “Δ Density” of the polymeric blend is the difference (in absolute value) between the density of the first ethylene-based polymer and the density of the second ethylene-based polymer, and may be calculated according to Equation (I):
Δ Density=|density of first ethylene-based polymer−density of second ethylene-based polymer|  (I)

(61) In an embodiment, the polymeric blend has a Δ melt index from 0 g/10 min to 4 g/10 min, or 15 g/10 min, or 20 g/10 min, or 50 g/10 min, or 100 g/10 min, or 125 g/10 min, or 150 g/10 min, or 152 g/10 min, or 155 g/10 min. The “Δ melt index” or “Δ MI” of the polymeric blend is the difference (in absolute value) between the melt index (MI) (190° C./2.16 kg) of the first ethylene-based polymer and the melt index (MI) (190° C./2.16 kg) of the second ethylene-based polymer, and may be calculated according to Equation (II):
ΔMI=|MI of first ethylene-based polymer−MI of second ethylene-based polymer|  (II)

(62) In an embodiment, the polymeric blend contains, consists essentially of, or consists of: (A) from 50 wt %, or 55 wt %, or 60 wt %, or 65 wt %, or 70 wt %, or 75 wt % to 80 wt %, or 85 wt %, or 90 wt % of the first ethylene-based polymer; (B) from 8 wt %, or 10 wt %, or 15 wt % to 20 wt %, or 25 wt %, or 30 wt %, or 35 wt %, or 40 wt %, or 45 wt %, or 48 wt % of the second ethylene-based polymer; (C) from 0.01 wt %, or 0.02 wt %, or 0.05 wt % to 0.1 wt %, or 0.15 wt %, or 0.20 wt %, or 0.25 wt %, or 0.50 wt %, or 1.0 wt %, or 1.5 wt %, or 2.0 wt % slip agent; and (D) from 0 wt %, or 0.1 wt %, or 0.2 wt % to 0.3 wt %, or 0.5 wt %, or 1.0 wt %, or 2.0 wt %, or 3.0 wt %, or 5.0 wt % additive.

(63) In an embodiment, the polymeric blend contains, consists essentially of, or consists of: (A) from 50 wt %, or 55 wt %, or 60 wt %, or 65 wt %, or 70 wt %, or 75 wt % to 80 wt %, or 85 wt %, or 90 wt % of the first ethylene-based polymer (such as an ethylene/octene copolymer), and the first ethylene-based polymer has: (i) a density from 0.895 g/cc, or 0.894 g/cc, or 0.897 g/cc to 0.902 g/cc, or 0.903 g/cc, or 0.904 g/cc, or 0.905 g/cc; and (ii) a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 3.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min; (B) from 8 wt %, or 10 wt %, or 15 wt % to 20 wt %, or 25 wt %, or 30 wt %, or 35 wt %, or 40 wt %, or 45 wt %, or 48 wt % of the second ethylene-based polymer, and the second ethylene-based polymer has one, some, or all of the following properties: (i) a density from 0. 0.935 g/cc, or 0.940 g/cc, 0.941 g/cc, or 0.942 g/cc to 0.950 g/cc, or 0.955 g/cc, or 0.957 g/cc, or 0.958 g/cc, or 0.959 g/cc, or 0.960 g/cc, or 0.965 g/cc, or 0.967 g/cc; and (ii) a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0/10 min to 2.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min, or 15 g/10 min, or 20 g/10 min, or 25 g/10 min, or 30 g/10 min, or 35 g/10 min, or 40 g/10 min, or 45 g/10 min, or 54/10 min, or 64/10 min, or 70 g/10 min, or 80 g/10 min, or 90 g/10 min, or 100 g/10 min, or 110 g/10 min, or 120 g/10 min, or 130 g/10 min, or 140 g/10 min, or 150 g/10 min, or 160 g/10 min; (C) from 0.01 wt %, or 0.02 wt %, or 0.05 wt % to 0.1 wt %, or 0.15 wt %, or 0.20 wt %, or 0.25 wt %, or 0.50 wt %, or 1.0 wt %, or 1.5 wt %, or 2.0 wt % slip agent, wherein the slip agent is a fatty acid amide such as erucamide; (D) from 0 wt %, or 0.1 wt %, or 0.2 wt % to 0.3 wt %, or 0.5 wt %, or 1.0 wt %, or 2.0 wt %, or 3.0 wt %, or 5.0 wt % additive;
and the polymeric blend (and/or the composition) has: (1) an overall density from 0.900 g/cc, or 0.905 g/cc, or 0.908 g/cc to 0.910 g/cc, or 0.915 g/cc, or 09.20 g/cc, or 0.925 g/cc; and (2) a COF after aging for 1 week at 60° C. from 0.001, or 0.050, or 0.100 to 0.250, or 0.300, or 0.330, or 0.360, or 0.397, or 0.398, or 0.399, or 0.400.
In a further embodiment, the polymeric blend (and/or the composition) has one, some, or all of the following properties: (3) an initial COF from 0.001, or 0.050, or 0.090 to 0.100, or 0.110, or 0.140, or 0.150, or 0.152, or 0.160, or 0.170, or 0.180, or 0.190, or 0.200; and/or (4) a Δ Density from 0.039 g/cc, or 0.040 g/cc to 0.061 g/cc, or 0.062 g/cc, or 0.063 g/cc, or 0.064 g/cc, or 0.065 g/cc; and/or (5) Δ MI from 0 g/10 min to 4 g/10 min, or 15 g/10 min, or 20 g/10 min, or 50 g/10 min, or 100 g/10 min, or 125 g/10 min, or 150 g/10 min, or 152 g/10 min, or 155 g/10 min.

(64) In an embodiment, the polymeric blend and/or the composition has at least 3, or at least 4, or all 5 of properties (1)-(5).

(65) It is understood that the sum of the components in each of the polymeric blends, compositions, and layers disclosed herein, including the foregoing polymeric blends, yields 100 weight percent (wt %).

(66) In an embodiment, the first ethylene-based polymer is an ethylene/octene copolymer having a density from 0.895 g/cc to 0.905 g/cc, and the second ethylene-based polymer is an ethylene/octene copolymer having a density from 0.935 g/cc to 0.967 g/cc. In a further embodiment, the first ethylene/octene copolymer has a density from 0.897 g/cc to 0.902 g/cc, and the second ethylene/octene copolymer has a density from 0.942 g/cc to 0.958 g/cc, or 0.960 g/cc. In another embodiment, the slip agent is a fatty acid amide, such as erucamide.

(67) In an embodiment, the polymeric blend and/or the composition excludes propylene-based polymers.

(68) In an embodiment, the polymeric blend and/or the composition excludes silicones. In a further embodiment, the polymeric blend and/or the composition excludes PDMS. PDMS is known to increase the haze of ethylene-based compositions.

(69) The polymeric blend may comprise two or more embodiments disclosed herein.

(70) The composition may comprise two or more embodiments disclosed herein.

(71) F. Film

(72) The present disclosure also provides a film. The film includes a layer containing the present composition. The composition for the film layer includes the polymeric blend containing (A) from 50 wt % to 90 wt % of a first ethylene-based polymer having a density from 0.895 g/cc to 0.905 g/cc, and a melt index from 0.1 g/10 min to 50 g/10 min; (B) from 8 wt % to 48 wt % of a second ethylene-based polymer having a density from 0.935 g/cc to 0.967 g/cc, and a melt index from 0.1 g/10 min to 180 g/10 min; (C) from 0.01 wt % to 2.0 wt % of a slip agent, based on the total weight of the polymeric blend. The polymeric blend has (i) an overall density from 0.900 g/cc to 0.925 g/cc and (ii) a COF after aging for 1 week at 60° C. from 0.001 to 0.400. The polymeric blend may be any polymeric blend disclosed herein. The composition may be any composition disclosed herein.

(73) The film may be a monolayer film or a multilayer film. A “monolayer film” contains one and only one layer. A “multilayer film” contains two layers, or more than two layers. For example, the multilayer film can have three, four, five, six, seven, eight, nine, ten, eleven, or more layers. In an embodiment, the film is a multilayer film with two layers.

(74) In an embodiment, the film is a multilayer film with a first layer containing the composition including the polymeric blend.

(75) The first layer has two opposing surfaces. In an embodiment, the first layer is a continuous layer with two opposing surfaces.

(76) In an embodiment, the first layer containing the present composition including the polymeric blend has an initial COF from 0.001, or 0.050, or 0.090 to 0.100, or 0.110, or 0.140, or 0.150, or 0.152, or 0.160, or 0.170, or 0.180, or 0.190, or 0.200, or 0.250, or 0.300, or 0.350, or 0.400.

(77) In an embodiment, the first layer containing the present composition including the polymeric blend has a COF after aging for 1 week at 60° C. from 0.001, or 0.050, or 0.100 to 0.250, or 0.300, or 0.330, or 0.360, or 0.397, or 0.398, or 0.399, or 0.400.

(78) In an embodiment, the first layer containing the present composition including the polymeric blend and/or the film has a light transmission from 90%, or 92% to 94%, or 95%, or 99%, or 100%.

(79) In an embodiment, the first layer containing the present composition including the polymeric blend and/or the film has a haze from 0.5%, or 1.0% to 2.0%, or 2.5%, or 3.0%, or 3.5%, or 4.0%, or 4.5%, or 5.0%, or 5.5%, or 6.0%, or 10%, or 15%, or 20%, or 25%, or 30%.

(80) In an embodiment, the first layer containing the present composition including the polymeric blend has an initial surface roughness from 10 nm, or 13 nm, or 15 nm, or 20 nm to 25 nm, or 29 nm, or 30 nm, or 35 nm, or 40 nm.

(81) In an embodiment, the first layer containing the present composition including the polymeric blend has a surface roughness after aging for 1 week at 60° C. from 10 nm, or 13 nm, or 15 nm, or 20 nm, or 22 nm to 25 nm, or 29 nm, or 30 nm, or 35 nm, or 40 nm, or 45 nm.

(82) Not wishing to be bound by any particular theory, Applicants believe the combination of the lower-density first ethylene-based polymer (0.895-0.905 g/cc) with the higher-density second ethylene-based polymer (0.935-0.967 g/cc) increases the surface roughness of a layer containing the polymeric blend, which minimizes the surface contact area between two films and results in lower COF.

(83) In an embodiment, the first layer containing the present composition including the polymeric blend has a heat seal initiation temperature (HSIT) from 65° C., or 70° C., or 75° C., or 80° C. to 84° C., or 85° C., or 90° C., or 95° C., or 100° C. A low HSIT (100° C.) is advantageous for the production process of articles formed from the film because a heat seal may be formed at a lower temperature.

(84) In an embodiment, the first layer containing the present composition including the polymeric blend has a thickness from 5 μm, or 10 μm, or 15 μm, or 20 μm, or 25 μm to 30 μm, or 40 μm, or 50 μm, or 55 μm.

(85) In an embodiment, the film, and further the multilayer film, has a first layer containing a composition including a polymeric blend, the polymeric blend containing, consisting essentially of, or consisting of: (A) from 50 wt %, or 55 wt %, or 60 wt %, or 65 wt %, or 70 wt %, or 75 wt % to 80 wt %, or 85 wt %, or 90 wt % of the first ethylene-based polymer (such as an ethylene/octene copolymer), and the first ethylene-based polymer has (i) a density from 0.895 g/cc, or 0.894 g/cc, or 0.897 g/cc to 0.902 g/cc, or 0.903 g/cc, or 0.904 g/cc, or 0.905 g/cc, and (ii) a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 3.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min; (B) from 8 wt %, or 10 wt %, or 15 wt % to 20 wt %, or 25 wt %, or 30 wt %, or 35 wt %, or 40 wt %, or 45 wt %, or 48 wt % of the second ethylene-based polymer, and the second ethylene-based polymer has (i) a density from 0. 0.935 g/cc, or 0.940 g/cc, 0.941 g/cc, or 0.942 g/cc to 0.950 g/cc, or 0.955 g/cc, or 0.957 g/cc, or 0.958 g/cc, or 0.959 g/cc, or 0.960 g/cc, or 0.965 g/cc, or 0.967 g/cc; and (ii) a melt index from 0.1 g/10 min, or 0.5 g/10 min, or 1.0 g/10 min to 2.0 g/10 min, or 5.0 g/10 min, or 10.0 g/10 min, or 15 g/10 min, or 20 g/10 min, or 25 g/10 min, or 30 g/10 min, or 35 g/10 min, or 40 g/10 min, or 45 g/10 min, or 50 g/10 min, or 60 g/10 min, or 70 g/10 min, or 80 g/10 min, or 90 g/10 min, or 100 g/10 min, or 110 g/10 min, or 120 g/10 min, or 130 g/10 min, or 140 g/10 min, or 150 g/10 min, or 160 g/10 min; (C) from 0.01 wt %, or 0.02 wt %, or 0.05 wt % to 0.1 wt %, or 0.15 wt %, or 0.20 wt %, or 0.25 wt %, or 0.50 wt %, or 1.0 wt %, or 1.5 wt %, or 2.0 wt % slip agent, wherein the slip agent is a fatty acid amide such as erucamide; (D) from 0 wt %, or 0.1 wt %, or 0.2 wt % to 0.3 wt %, or 0.5 wt %, or 1.0 wt %, or 2.0 wt %, or 3.0 wt %, or 5.0 wt % additive; the polymeric blend and/or the composition, having: (i) an overall density from 0.900 g/cc, or 0.905 g/cc, or 0.908 g/cc to 0.910 g/cc, or 0.915 g/cc, or 09.20 g/cc, or 0.925 g/cc; and (ii) optionally, a Δ Density from 0.039 g/cc, or 0.040 g/cc to 0.061 g/cc, or 0.062 g/cc, or 0.063 g/cc, or 0.064 g/cc, or 0.065 g/cc; and (iii) optionally, a Δ MI from 0 g/10 min to 4 g/10 min, or 15 g/10 min, or 20 g/10 min, or 50 g/10 min, or 100 g/10 min, or 125 g/10 min, or 150 g/10 min, or 152 g/10 min, or 155 g/10 min; and the first layer has a COF after aging for 1 week at 60° C. from 0.001, or 0.050, or 0.100 to 0.250, or 0.300, or 0.330, or 0.360, or 0.397, or 0.398, or 0.399, or 0.400; and one, some or all of the following properties: (a) an initial COF from 0.001, or 0.050, or 0.090 to 0.100, or 0.110, or 0.140, or 0.150, or 0.152, or 0.160, or 0.170, or 0.180, or 0.190, or 0.200; and/or (b) a light transmission from 90%, or 92% to 94%, or 95%, or 99%, or 100%; and/or (c) a haze from 0.5%, or 1.0% to 2.0%, or 2.5%, or 3.0%, or 3.5%, or 4.0%, or 4.5%, or 5.0%, or 5.5%, or 6.0%, or 10%, or 15%, or 20%; and/or (d) an initial surface roughness from 20 nm to 25 nm, or 29 nm, or 30 nm, or 35 nm, or 40 nm; and/or (e) a surface roughness after aging for 1 week at 60° C. from 20 nm, or 22 nm to 25 nm, or 29 nm, or 30 nm, or 35 nm, or 40 nm, or 45 nm; and/or (f) a HSIT from 70° C., or 75° C., or 80° C. to 84° C., or 85° C., or 90° C., or 95° C.; and/or (g) a thickness from 5 μm, or 10 μm, or 15 μm, or 20 μm, or 25 μm to 30 μm, or 40 μm, or 50 μm, or 55 μm.

(86) In an embodiment, the first layer has at least 1, or at least 2, or at least 3, or at least 4, or at least 5, or at least 6, or all 7 of properties (a)-(g).

(87) In an embodiment, the film is a multilayer film containing a second layer. The second layer directly contacts the first layer. The term “directly contacts,” as used herein, is a layer configuration whereby the first layer is located immediately adjacent to the second layer and no intervening layers, or no intervening structures, are present between the first layer and the second layer. The second layer has two opposing surfaces. In an embodiment, the second layer is a continuous layer with two opposing surfaces.

(88) In an embodiment, the second layer contains metal foil, polyamide (such as Nylon 6; Nylon 6/6; Nylon 6/66; Nylon 6/12; Nylon 12; etc.), ethylene-base polymer, ethylene/vinyl alcohol (EVOH) copolymer, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), ethylene/acrylic acid (EAA) copolymer, ethylene/methacrylic acid (EMAA) copolymer, polylactic acid, cellulosic material (such as paper), or combinations thereof. In an embodiment, the second layer contains PET.

(89) In an embodiment, the film, or further the multilayer film, has a thickness from 25 μm, or 30 μm, or 40 μm, or 50 μm to 55 μm, or 60 μm, or 70 μm, or 80 μm, or 90 μm, or 100 μm, or 110 μm, or 120 μm, or 130 μm, or 140 μm, or 150 μm, or 200 μm, or 250 μm, or 300 μm.

(90) In an embodiment, the film is formed as a blown film, or further a blown multilayer film, with the first layer and the second layer in direct contact with each other.

(91) In an embodiment, the first layer containing the composition including the polymeric blend is a skin layer. A “skin layer” is an outermost layer of the film structure. In other words, at least one surface of a skin layer is an outermost surface of the film.

(92) In an embodiment, the first layer containing the composition including the polymeric blend is a seal layer.

(93) In an embodiment, the film excludes propylene-based polymers.

(94) In an embodiment, the film excludes silicones. In a further embodiment, the film excludes PDMS.

(95) The film may comprise two or more embodiments disclosed herein.

(96) The present disclosure also provides an article containing the multilayer film, such as a package. Nonlimiting examples of suitable packages include food packages and specialty packages.

(97) By way of example, and not limitation, some embodiments of the present disclosure will now be described in detail in the following Examples.

EXAMPLES

(98) Materials used in the examples are provided in Table 1 below.

(99) TABLE-US-00001 TABLE 1 Material/Description Properties Source AFFINITY ™ PL 1880G MI (I2)(190° C./2.16 kg) = 1.0 g/10 min, The Dow Chemical (ethylene/1-octene copolymer) Density = 0.902 g/cc, Melting point = 99° C. Company (plastomer/elastomer) AFFINITY ™ PF 1140G MI (I2)(190° C./2.16 kg) = 1.6 g/10 min, The Dow Chemical (ethylene/1-octene copolymer) Density = 0.897 g/cc, Melting point = 96.1° C. Company (plastomer/elastomer) AFFINITY ™ PL 1840G MI (I2)(190° C./2.16 kg) = 1.0 g/10 min, The Dow Chemical (ethylene/1-octene copolymer) Density = 0.909 g/cc, Melting point = 106° C. Company (plastomer/elastomer) PE-C MI (I2)(190° C./2.16 kg) = 1.0 g/10 min, (ethylene/1-octene copolymer) Density = 0.924 g/cc, Melting point = 117.7° C. (LLDPE) PE-D MI (I2)(190° C./2.16 kg) = 170.1 g/10 min, (ethylene/1-octene copolymer) Density = 0.941 g/cc, Melting point = 128.2° C. (HDPE) PE-E MI (I2)(190° C./2.16 kg) = 820.0 g/10 min, (ethylene/1-octene copolymer) Density = 0.940 g/cc, Melting point = 119.6° C. (HDPE) PE-F MI (I2)(190° C./2.16 kg) = 1.0 g/10 min, (ethylene/1-octene copolymer) Density = 0.942 g/cc, Melting point = 129.0° C. (HDPE) PE-G MI (I2)(190° C./2.16 kg) = 4.9 g/10 min, (ethylene/1-octene copolymer) Density = 0.958 g/cc, Melting point = 133.3° C. (HDPE) PE-H MI (I2)(190° C./2.16 kg) = 19.3 g/10 min, (ethylene/1-octene copolymer) Density = 0.958 g/cc, Melting point = 133.8° C. (HDPE) PE-I MI (I2)(190° C./2.16 kg) = 153.5 g/10 min, (ethylene/1-octene copolymer) Density = 0.957 g/cc, Melting point = 133.6° C. (HDPE) CRODAMIDE ™ ER-BR Erucamide Croda Polymer Additives

(100) Monolayer blown films are prepared with the compositions outlined in Table 2. The monolayer films are 50.8 μm (2 mils) thick.

(101) The prepared film samples are collected as rolls and stored for at least 1 week at ambient conditions (<25° C., 101.325 kPa, <60% relative humidity), after which specimens are cut for the measurement of the initial COF and initial surface roughness. The results are reported in Table 2.

(102) A separate set of specimens cut from the film rolls are aged for 1 week at 60° C. (101.325 kPa, <60%% relative humidity) in air and allowed to equilibrate at ambient conditions for 1 day, and then the 60° C. aged COF and 60° C. aged surface roughness are measured. The results are reported in Table 2.

(103) Film samples are then heat sealed according to ASTM F-88 (technique A). The film rolls are conditioned for a minimum of 40 hours at 23° C. (±2° C.) and 50% (±10%) relative humidity in accordance with ASTM D-618 (procedure A). Then, specimen sheets are cut from the film rolls in the machine direction to a length of approximately 27.94 cm (11 inches) and a width of approximately 21.59 cm (8.5 inches). The sheets are heat sealed across the machine direction on a Kopp™ Heat Sealer over a range of temperatures under the following conditions: Sealing Pressure=0.275 N/mm.sup.2; Sealing Dwell Time=0.5 seconds; Depth of Seal=5 mm. The sealed sheets are conditioned for a minimum of 3 hours at 23° C. (±2° C.) and 50% (±10%) relative humidity and cut into 2.54 cm (1 inch) wide strips. The cut strips are conditioned fora minimum of 24 hours after sealing at 23° C. (±2° C.) and 50% (±10%) relative humidity prior to HSIT testing.

(104) For HSIT testing, the strips are loaded into the grips of a INSTRON® Tensiomer at an initial separation of 5.08 cm (2 inches) and pulled at a grip separation rate of 10 in/min (4.2 mm/sec or 250 mm/min) at 23° C. (±2° C.) and 50% (±10%) relative humidity. The strips are tested unsupported. Six replicate tests are performed for each sealing temperature. The maximum force at failure is recorded. HSIT is defined as the temperature at which the average maximum force reaches 13.34 N. The results are reported in Table 3.

(105) TABLE-US-00002 TABLE 2 PE Component 2 60° C. Light PE Component 1 Ethylene- Overall Δ Δ MI.sup.2 60° C. Initial Aged Trans- Ethylene-Based Based Erucamide Density density.sup.1 g/10 Initial Aged SR SR Haze mission Polymer wt % Polymer wt % (wt %) (g/cc) (g/cc) min) COF.sup.3 COF.sup.4 (nm).sup.5 (nm).sup.6 (%) (%) CS 1 AFFINITY ™ PL 1840G 99.90 — — 0.1 0.909 NA NA 0.157 0.559 11.8 12.3 2.2 93.1 CS 2 AFFINITY ™ PL 1880G 64.94 PE-C 34.96 0.1 0.910 0.022 0.0 0.153 0.597 3.1 93.5 CS 3 AFFINITY ™ PL 1880G 79.92 PE-D 19.98 0.1 0.910 0.039 169.1 0.192 0.496 18.5 21.6 8.2 93.3 CS 4 AFFINITY ™ PL 1880G 79.92 PE-E 19.98 0.1 0.909 0.038 819.0 0.128 0.489 5.4 93.4 Ex 1 AFFINITY ™ PL 1880G 79.92 PE-F 19.98 0.1 0.910 0.040 0.0 0.133 0.397 23.5 24.2 4.5 92.9 Ex 2 AFFINITY ™ PF 1140G 79.92 PE-G 19.98 0.1 0.909 0.061 3.3 0.152 0.201 28.6 32.5 15.5 93.1 Ex 3 AFFINITY ™ PF 1140G 79.92 PE-H 19.98 0.1 0.909 0.061 17.7 0.107 0.359 28.9 32.7 16.9 93.3 Ex 4 AFFINITY ™ PL 1880G 79.92 PE-I 19.98 0.1 0.908 0.061 151.9 0.096 0.327 25.9 26.8 18.3 93.2 CS = Comparative Sample .sup.1Δ density = | density of Component 1-density of Component 2 | .sup.2Δ MI = | MI of Component 1-MI of Component 2 | .sup.3Coefficient of Friction (COF) after film is stored for 1 week at ambient conditions. .sup.4Coefficient of Friction (COF) after film is aged for 1 week at 60° C. .sup.5Initial SR is the initial surface roughness (SR) of the film, measured after film is stored for 1 week at ambient conditions. .sup.660° C. Aged SR is the surface roughness (SR) of the film after the film is aged for 1 week at 60° C.

(106) TABLE-US-00003 TABLE 3 PE Component 2 PE Component 1 Ethylene- Overall Δ Δ MI.sup.2 Ethylene-Based Based Erucamide Density density.sup.1 (g/10 HSIT.sup.3 Polymer wt % Polymer wt % (wt %) (g/cc) (g/cc) min) (° C.) CS 1 AFFINITY ™ PL 1840G 99.90 — — 0.1 0.909 NA NA 91 CS 2 AFFINITY ™ PL 1880G 64.94 PE-C 34.96 0.1 0.910 0.022 0.0 86 CS 3 AFFINITY ™ PL 1880G 79.92 PE-D 19.98 0.1 0.910 0.039 169.1 90 CS 4 AFFINITY ™ PL 1880G 79.92 PE-E 19.98 0.1 0.909 0.038 819.0 88 Ex 1 AFFINITY ™ PL 1880G 79.92 PE-F 19.98 0.1 0.910 0.040 0.0 84 Ex 2 AFFINITY ™ PF 1140G 79.92 PE-G 19.98 0.1 0.909 0.061 3.3 80 Ex 3 AFFINITY ™ PF 1140G 79.92 PE-H 19.98 0.1 0.909 0.061 17.7 80 Ex 4 AFFINITY ™ PL 1880G 79.92 PE-I 19.98 0.1 0.908 0.061 151.9 80 CS = Comparative Sample .sup.1Δ density = | density of Component 1-density of Component 2 | .sup.2Δ MI = | MI of Component 1-MI of Component 2 | .sup.3HSIT = Heat Seal Initiation Temperature

(107) A comparative sample film produced with a layer containing a single ethylene-based polymer and a slip agent (CS 1) with an overall density of 0.909 g/cc exhibits a low initial COF (0.157), but a high COF after aging for 1 week at 60° C. (0.559). Likewise, comparative sample films produced with a layer containing a polymeric blend with two ethylene-based polymers having a Δ density less than 0.039 g/cc and a slip agent (CS 2-4) with an overall density of 0.909-0.910 g/cc exhibit a low initial COF (0.128-0.192), but a high COF after aging for 1 week at 60° C. (0.400).

(108) Applicant surprisingly discovered that films produced with a layer containing a polymeric blend with two ethylene-based polymers having a Δ density of 0.039-0.065 g/cc and a slip agent (Ex. 1-4) with an overall density of 0.908-0.910 g/cc advantageously have a low initial COF (0.001-0.400) and a low COF after aging for 1 week at 60° C. (0.001-0.400). These results demonstrate that the increase in COF typically caused by exposure to high temperatures (here, 60° C.) is avoided, or mitigated, in the present polymeric blend.

(109) It is specifically intended that the present disclosure not be limited to the embodiments and illustrations contained herein, but include modified forms of those embodiments including portions of the embodiments and combinations of elements of different embodiments as come within the scope of the following claims.