Patent classifications
C08L23/0807
Polymer composition and cable with advantageous electrical properties
The invention relates to polymer composition comprising a polyolefin (a) and an inorganic filler (b) wherein the polyolefin (a) is obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (a) from the unreacted products and recovering the separated polyolefin (a) in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil, power cable, for example a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.
Polyethylene composition and film having a good permeability, stiffness and sealability
A polyethylene composition includes a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution Mw/Mn of <2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 15,000 to 100,000 and a molecular weight distribution Mw/Mn of <2.3, and a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution Mw/Mn of >2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition has a soluble fraction in a CEF analysis of at least 10 weight percent. Film made from the polyethylene composition may have a machine direction 1% secant modulus of □190 MPa (at a film thickness of about 1 mil), a seal initiation temperature (SIT) of ≤100° C. (at a film thickness of about 2 mil), an area of hot tack window (AHTW) of ≥160 Newtons.Math.C° (at a film thickness of about 2 mil) and an oxygen transmission rate (OTR) of ≥650 cm3 per 100 inch2 per day (at a film thickness of about 1 mil).
ADHESIVE FORMULATIONS BASED ON ETHYLENE MULTI-BLOCK INTERPOLYMERS AND FUNCTIONALIZED PROPYLENE-BASED POLYMERS
A hot melt adhesive (HMA) composition comprises: a) an ethylene/alpha-olefin multi-block interpolymer that has a melt viscosity (177° C.)≤50,000 mPa.Math.s; b) an anhydride and/or carboxylic acid functionalized propylene-based polymer that has a melt viscosity (190° C.)≤50,000 mPa.Math.s; c) a tackifier; and d) a wax. Such composition delivers both a high temperature heat resistance and a fast set time.
MULTILAYER FILMS AND ARTICLES COMPRISING THE SAME
The present invention relates to multilayer films. In one aspect, a multilayer film comprises a first polyethylene composition having a density of at least 0.965 g/cm.sup.3 and as further described herein and a second polyethylene composition having a density of 0.924 g/cm.sup.3 to 0.936 g/cm.sup.3 and as further described herein, wherein the multilayer film comprises 40 weight percent or less of the first polyethylene composition based on the total weight of the multilayer film.
Heat-Shrinkable Polyethylene Films
A heat-shrinkable film comprises at least one layer made from a polymer blend comprising a virgin first polymer composition and at least 20 wt % of a recycled second polymer composition. The first polymer composition comprises at least 50 wt % of a polymer (a1) of ethylene and at least one alpha olefin having 5 to 20 carbon atoms, the polymer (a1) having a density from 0.918 to 0.945 g/cm.sup.3, a melt index from 0.1 to 2.5 g/10 min, a melt flow ratio from 25 to 80, a Compositional Distribution Breadth Index of at least 70%, and an averaged Modulus (M) from 20,000 to 60,000 psi. The second polymer composition is different from the first polymer composition, has a melt index (I.sub.2.16) from 0.1 to 2.5 g/10 min and comprises at least 30 wt % of an ethylene homopolymer (b1) having a density from 0.910 to 0.940 g/cm.sup.3.
Heat-Shrinkable Polyethylene Films
A heat-shrinkable film comprises at least one layer made from a polymer blend comprising a virgin first polymer composition and at least 20 wt % of a recycled second polymer composition. The first polymer composition comprises at least 50 wt % of a polymer (a1) of ethylene and at least one alpha olefin having 5 to 20 carbon atoms, the polymer (a1) having a density from 0.918 to 0.945 g/cm.sup.3, a melt index from 0.1 to 2.5 g/10 min, a melt flow ratio from 25 to 80, a Compositional Distribution Breadth Index of at least 70%, and an averaged Modulus (M) from 20,000 to 60,000 psi. The second polymer composition is different from the first polymer composition, has a melt index (I.sub.2.16) from 0.1 to 2.5 g/10 min and comprises at least 30 wt % of an ethylene homopolymer (b1) having a density from 0.910 to 0.940 g/cm.sup.3.
PROPYLENE COPOLYMER COMPOSITION WITH EXCELLENT OPTICAL AND MECHANICAL PROPERTIES
The present invention is directed to a polypropylene composition (P) comprising a copolymer (C) of propylene and 1-hexene comprising a first random propylene copolymer (A) of propylene and a 1-hexene, and a second random propylene copolymer (B) of propylene and 1-hexene having a higher 1-hexene content than the first random propylene copolymer (A) as well as a plastomer (PL) being an elastomeric copolymer of ethylene and at least one C.sub.4 to C.sub.10 α-olefin. Further, the present invention is directed to an article comprising said polypropylene composition (P) and the use of said polypropylene composition (P) as a sealing layer in a multi-layer film.
Modified polyethylene compositions with enhanced melt strength
The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g′.sub.vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g′.sub.vis of 0.70 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 4.0 or more; d) a shear thinning ratio of 110 or more, e) a melt strength of 10 cN or more; f) a complex viscosity at 0.1 rad/sec at 190° C. of at least 130,000 Pa.Math.s; and g) a phase angle of Z° or less where Z=138.3G*.sup.(−0.142), where G* is the complex modulus reported in Pascals measured at 190° C. and the phase angle units are reported in degrees, wherein the G* is from 1,000 to 1,000,000 Pa.
Artificial turf filament and articles incorporating same
Artificial turf filaments formed from polyethylene are provided that can have desirable properties. In one aspect, an artificial turf filament comprises a composition comprising a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2≥7.0−1.2×log (I2).
Artificial turf filament and articles incorporating same
Artificial turf filaments formed from polyethylene are provided that can have desirable properties. In one aspect, an artificial turf filament comprises a composition comprising a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2≥7.0−1.2×log (I2).