Unoriented film

Abstract

Unoriented film comprising at least 70 wt.-% of an heterophasic propylene copolymer, said heterophasic propylene copolymer comprises a matrix being a random propylene copolymer and an elastomeric propylene copolymer dispersed in said matrix, wherein the heterophasic propylene copolymer has (a) a melt flow rate MFR.sub.2 (230° C.) in the range of 3.0 to 10.0 g/10 min, (b) a melting temperature in the range of 130 to 150° C., (c) a xylene cold soluble content in the range of 25 to 50 wt.-%, (d) comonomer content in the range of 10.0 to 15.0 wt.-%, wherein further the xylene cold soluble content of the heterophasic propylene copolymer has (e) a comonomer content in the range of 20 to 30 wt.-% and (f) an intrinsic viscosity in the range of 0.8 to below 2.0 dl/g.

Claims

1. Unoriented film comprising at least 70 wt.% of an heterophasic propylene copolymer (RAHECO), said heterophasic propylene copolymer (RAHECO) comprises a matrix (M) being a random propylene copolymer (R-PP) and an elastomeric propylene copolymer (E) dispersed in said matrix (M), wherein the heterophasic propylene copolymer (RAHECO) has: (a) a melt flow rate MFR.sub.2 (230° C.) measured according to ISO 1133 in the range of 3.0 to 10.0 g/10 min, (b) a melting temperature Tm determined by differential scanning calorimetry (DSC) in the range of 130 to 150° C., (c) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 25 to 50 wt. %, (d) a comonomer content in the range of 10.0 to 13.5 wt. %, wherein the xylene cold soluble content (XCS) of the heterophasic propylene copolymer (RAHECO) has: (e) a comonomer content in the range of 21.6 to 30 wt.% and (f) an intrinsic viscosity (IV) determined according to DIN ISO 1628/1, (in Decalin at 135 ° C.) in the range of 0.8 to below 2.0 dl/g, and wherein the random propylene copolymer (R-PP): (g) has a comonomer content in the range of 7.1 to 9.0 wt.%, and (h) comprises at least two propylene copolymer fractions (R-PP1) and (R-PP2), wherein the first propylene copolymer fraction (R-PP1) has a comonomer content in the range of 2.0 to 6.0 wt %, and the second propylene copolymer fraction (R-PP2) has a comonomer content in the range of 8.0 to 11.0 wt.%, wherein the comonomer content of the elastomeric propylene copolymer (E) is in the range of 30.0 to 36.0 wt. %, and wherein said film has a thickness of 5 to 2,000 μm.

2. Unoriented film according to claim 1, wherein [R-PP]−[R-PP1]≧2.5, wherein [R-PP] is the comonomer content [wt. %] of the random propylene copolymer (R-PP), and [R-PP1] is the comonomer content [wt. %] of the first propylene copolymer fraction (R-PP1).

3. Unoriented film according to claim 1, wherein the comonomers of the random propylene copolymer (R-PP), the first propylene copolymer fraction (R-PP1) and the second propylene copolymer fraction (R-PP2) are ethylene and/or C.sub.4 to C.sub.12 α-olefin.

4. Unoriented film according to claim 1, wherein said film has: (a) a tensile modulus in machine direction measured on a cast film with a thickness of 130 μm according to ISO 527-3 at 23° C. and a cross head speed of 1 mm/min in the range of 100 to 250 MPa, and/or (b) a relative total penetration energy (Wbreak) as determined by the “Dynatest” method according to ISO 7725-2 at 0° C. on a cast film with a thickness of 130 μm in the range of 10 to 50 J/mm.

5. Unoriented film according to claim 1, wherein said film has: (a) a transparency of at least 90%, (b) a haze of below 6.0%, and/or (c) a clarity of at least 92%, measured on a 50 μm cast film according to ASTM D1003-00.

6. Unoriented film according to claim 1, wherein said film has a hexane soluble content determined according to FDA (section 177.1520) on a 100 μm cast film of below 8.0 wt. %.

7. Unoriented film according to claim 1, wherein the heterophasic propylene copolymer (RAHECO) has been visbroken.

8. Unoriented film according to claim 7, wherein the heterophasic propylene copolymer (RAHECO) prior to visbreaking is a heterophasic propylene copolymer (Pre-RAHECO) comprising a matrix (Pre-M) being a random propylene copolymer (Pre-R-PP) and an elastomeric propylene copolymer (Pre-E) dispersed in said matrix (Pre-M), said heterophasic propylene copolymer (Pre-RAHECO) has: (a) a melt flow rate MFR.sub.2 (230° C.) measured according to ISO 1133 in the range of 0.3 to 2.5 g/10 min, and (b) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 25 to 50 wt. %, wherein further the xylene cold soluble content (XCS) of the heterophasic propylene copolymer (Pre-RAHECO) prior to visbreaking has an intrinsic viscosity (IV) determined according to DIN ISO 1628/1, (in Decalin at 135° C.) in the range of 1.4 to below 2.5 dl/g.

9. Unoriented film according to claim 1, wherein the unoriented film is a cast film or a blown film.

10. Process for producing an unoriented film according to claim 1, comprising the steps of: (a) producing in a multistage process comprising at least two reactors connected in series a heterophasic propylene copolymer (Pre-RAHECO) comprising a matrix (Pre-M) being a random propylene copolymer (Pre-R-PP) and an elastomeric propylene copolymer (Pre-E) dispersed in said matrix (Pre-M), wherein said heterophasic propylene copolymer (Pre-RAHECO) has: (a1) a melt flow rate MFR.sub.2 (230° C.) measured according to ISO 1133 in the range of 0.3 to 2.5 g/10 min, and (a2) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 25 to 50 wt. %, wherein further the xylene cold soluble content (XCS) of said heterophasic propylene copolymer (Pre-RAHECO) has an intrinsic viscosity (IV) determined according to DIN ISO 1628/1, (in Decalin at 135° C.) in the range of 1.4 to below 2.5 dl/g, (b) visbreaking the heterophasic propylene copolymer (Pre-RAHECO) of step (a) obtaining a heterophasic propylene copolymer (RAHECO), said heterophasic propylene copolymer (RAHECO) has: (b1) a melt flow rate MFR.sub.2 (230° C.) measured according to ISO 1133 in the range of 3.0 to 10.0 g/10 min, (b2) a melting temperature Tm determined by differential scanning calorimetry (DSC) in the range of 130 to 150° C., (b3) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 25 to 50 wt. %, and (b4) a comonomer content in the range of 10.0 to 13.5 wt. %, wherein the xylene cold soluble content (XCS) of the heterophasic propylene copolymer (RAHECO) of step (b) has: (b5) a comonomer content in the range of 21.6 to 30 wt.% and (b6) an intrinsic viscosity (IV) determined according to DIN ISO 1628/1, (in Decalin at 135° C.) in the range of 0.8 to below 2.0 dl/g, wherein the random propylene copolymer (R-PP): (b7) has a comonomer content in the range of 7.1 to 9.0 wt.%, and (b8) comprises at least two propylene copolymer fractions (R-PP1) and (R-PP2), wherein the first propylene copolymer fraction (R-PP1) has a comonomer content in the range of 2.0 to 6.0 wt %, and the second propylene copolymer fraction (R-PP2) has a comonomer content in the range of 8.0 to 11.0 wt. % and wherein the comonomer content of the elastomeric propylene copolymer (E) is in the range of 30.0 to 36.0 wt. %; and (c) extruding said heterophasic propylene copolymer (RAHECO) of step (b) into a unoriented film.

11. Process according to claim 10, wherein: (a) in a first reactor propylene and ethylene and/or C.sub.4 to C.sub.12 α-olefin are polymerized obtaining a first propylene copolymer fraction (Pre-PP1), (b) transferring said first propylene copolymer fraction (Pre-PP1) in a second reactor, (c) polymerizing in said second reactor in the presence of the first propylene copolymer fraction (Pre-PP1) propylene and ethylene and/or C.sub.4 to C.sub.12 α-olefin obtaining a second propylene copolymer fraction (Pre-PP2), said first propylene copolymer fraction (Pre-PP1) and said second propylene copolymer fraction (Pre-PP2) form the matrix (Pre-PP), (d) transferring said matrix (Pre-M) in a third reactor, and (e) polymerizing in said third reactor in the presence of the matrix (Pre-M) propylene and ethylene and/or C.sub.4 to C.sub.12 α-olefin obtaining an elastomeric propylene copolymer (E), said matrix (Pre-M) and said elastomeric propylene copolymer (E) form the heterophasic propylene copolymer (Pre-RAHECO).

12. Process according to claim 11, wherein unoriented film and/or the heterophasic propylene copolymer (RAHECO) has: (a) a melt flow rate MFR2 (230° C.) measured according to ISO 1133 in the range of 3.0 to 10.0 g/10 min, (b) a melting temperature Tm determined by differential scanning calorimetry (DSC) in the range of 130 to 150° C., (c) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 25 to 50 wt. %, (d) a comonomer content in the range of 10.0 to 13.5 wt. %, wherein the xylene cold soluble content (XCS) of the heterophasic propylene copolymer (RAHECO) has: (e) a comonomer content in the range of 21.6 to 30 wt. % and (f) an intrinsic viscosity (IV) determined according to DIN ISO 1628/1, (in Decalin at 135° C.) in the range of 0.8 to below 2.0 dl/g.

13. A heterophasic propylene copolymer (RAHECO) for improving the optical properties of an unoriented film, comprising a matrix (M) being a random propylene copolymer (R-PP) and an elastomeric propylene copolymer (E) dispersed in said matrix (M), wherein further the heterophasic propylene copolymer (RAHECO) has (a) a melt flow rate MFR.sub.2 (230° C.) measured according to ISO 1133 in the range of 3.0 to 10.0 g/10 min, (b) a melting temperature Tm determined by differential scanning calorimetry (DSC) in the range of 130 to 150° C., (c) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 25 to 50 wt. %, (d) a comonomer content in the range of 10.0 to 13.5 wt. %, wherein the xylene cold soluble content (XCS) of the heterophasic propylene copolymer (RAHECO) has (e) a comonomer content in the range of 21.6 to 30 wt. % and (f) an intrinsic viscosity (IV) determined according to DIN ISO 1628/1, (in Decalin at 135° C.) in the range of 0.8 to below 2.0 dl/g, wherein the random propylene copolymer (R-PP) (g) has a comonomer content in the range of 7.1 to 9.0 wt. % and (h) comprises at least two propylene copolymer fractions (R-PP1) and (R-PP2), wherein the first propylene copolymer fraction (R-PP1) has a comonomer content in the range of 2.0 to 6.0 wt %, and the second propylene copolymer fraction (R-PP2) has a comonomer content in the range of 8.0 to 11.0 wt. %, wherein the comonomer content of the elastomeric propylene copolymer (E) is in the range of 30.0 to 36.0 wt. %; and wherein said improvement is determined by a haze of below 6.0%, wherein said film has a thickness of 5 to 2,000 μm and the haze is measured on a 50 μm cast film according to ASTM D1003-00.

14. The heterophasic propylene copolymer (RAHECO) according to claim 13, wherein the unoriented film is a cast film or a blown film.

Description

EXAMPLES

1. Measuring Methods

(1) The following definitions of terms and determination methods apply for the above general description of the invention as well as to the below examples unless otherwise defined.

(2) Calculation of comonomer content of the second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively:

(3) $\begin{array}{cc}\frac{C\left(\mathrm{PP}\right)-w\left(\mathrm{PP}1\right)\times C\left(\mathrm{PP}1\right)}{w\left(\mathrm{PP}2\right)}=C\left(\mathrm{PP}2\right)& \left(I\right)\end{array}$
wherein w(PP1) is the weight fraction [in wt.-%] of the first propylene copolymer fraction (R-PP1) and (Pre-R-PP1), respectively, w(PP2) is the weight fraction [in wt.-%] of second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively, C(PP1) is the comonomer content [in wt.-%] of the first propylene copolymer fraction (R-PP 1) and (Pre-R-PP 1), respectively, C(PP) is the comonomer content [in wt.-%] of the random propylene copolymer (R-PP) and (Pre-R-PP), C(PP2) is the calculated comonomer content [in wt.-%] of the second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively.

(4) Calculation of the xylene cold soluble (XCS) content of the second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively:

(5) $\begin{array}{cc}\frac{\mathrm{XS}\left(\mathrm{PP}\right)-w\left(\mathrm{PP}1\right)\times \mathrm{XS}\left(\mathrm{PP}1\right)}{w\left(\mathrm{PP}2\right)}=\mathrm{XS}\left(\mathrm{PP}2\right)& \left(\mathrm{II}\right)\end{array}$
wherein w(PP1) is the weight fraction [in wt.-%] of the first propylene copolymer fraction (R-PP1) and (Pre-R-PP1), respectively, w(PP2) is the weight fraction [in wt.-%] of second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively, XS(PP1) is the xylene cold soluble (XCS) content [in wt.-%] of the first propylene copolymer fraction (R-PP1) and (Pre-R-PP1), respectively, XS(PP) is the xylene cold soluble (XCS) content [in wt.-%] of the random propylene copolymer (R-PP) and (Pre-R-PP), XS(PP2) is the calculated xylene cold soluble (XCS) content [in wt.-%] of the second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively.

(6) Calculation of melt flow rate MFR.sub.2 (230° C.) of the second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively:

(7) $\begin{array}{cc}\mathrm{MFR}\left(\mathrm{PP}2\right)={10}^{\left[\frac{\log \left(\mathrm{MFR}\left(\mathrm{PP}\right)\right)-w\left(\mathrm{PP}1\right)\times \log \left(\mathrm{MFR}\left(\mathrm{PP}1\right)\right)}{w\left(\mathrm{PP}2\right)}\right]}& \left(I\right)\end{array}$
wherein w(PP1) is the weight fraction [in wt.-%] of the first propylene copolymer fraction (R-PP1) and (Pre-R-PP1), respectively, w(PP2) is the weight fraction [in wt.-%] of second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively, MFR(PP1) is the melt flow rate MFR.sub.2 (230° C.) [in g/10 min] of the first propylene copolymer fraction (R-PP1) and (Pre-R-PP1), respectively, MFR(PP) is the melt flow rate MFR.sub.2 (230° C.) [in g/10 min] of the random propylene copolymer (R-PP) and (Pre-R-PP), MFR(PP2) is the calculated melt flow rate MFR.sub.2 (230° C.) [in g/10 min] of the second propylene copolymer fraction (R-PP2) and (Pre-R-PP2), respectively.

(8) Calculation of comonomer content of the elastomeric propylene copolymer (E) and (Pre-E), respectively:

(9) $\begin{array}{cc}\frac{C\left(\mathrm{RAHECO}\right)-w\left(\mathrm{PP}\right)\times C\left(\mathrm{PP}\right)}{w\left(E\right)}=C\left(E\right)& \left(\mathrm{IV}\right)\end{array}$
wherein w(PP) is the weight fraction [in wt.-%] of the random propylene copolymer (R-PP) and (Pre-R-PP), w(E) is the weight fraction [in wt.-%] of the elastomeric propylene copolymer (E) and (Pre-E), respectively, C(PP) is the comonomer content [in wt.-%] of the random propylene copolymer (R-PP) and (Pre-R-PP), C(RAHECO) is the comonomer content [in wt.-%] of the heterophasic propylene copolymer (RAHECO) C(E) is the calculated comonomer content [in wt.-%] of elastomeric propylene copolymer (E) and (Pre-E), respectively.

(10) Calculation of xylene cold soluble (XCS) content of the third polypropylene (PP3):

(11) $\begin{array}{cc}\frac{\mathrm{XS}\left(\mathrm{RAHECO}\right)-w\left(\mathrm{PP}\right)\times \mathrm{XS}\left(\mathrm{PP}\right)}{w\left(E\right)}=\mathrm{XS}\left(E\right)& \left(V\right)\end{array}$
wherein w(PP) is the weight fraction [in wt.-%] of the random propylene copolymer (R-PP) and (Pre-R-PP), w(E) is the weight fraction [in wt.-%] of the elastomeric propylene copolymer (E) and (Pre-E), respectively, XS(PP) is the xylene cold soluble (XCS) content [in wt.-%] of the random propylene copolymer (R-PP) and (Pre-R-PP), XS(RAHECO) is the xylene cold soluble (XCS) content [in wt.-%] of the heterophasic propylene copolymer (RAHECO) XS(E) is the calculated xylene cold soluble (XCS) content [in wt.-%] of elastomeric propylene copolymer (E) and (Pre-E), respectively.

(12) NMR-Spectroscopy Measurements:

(13) The .sup.13C-NMR spectra of polypropylenes were recorded on Bruker 400 MHz spectrometer at 130° C. from samples dissolved in 1,2,4-trichlorobenzene/benzene-d6 (90/10 w/w). For the pentad analysis the assignment is done according to the methods described in literature: (T. Hayashi, Y. Inoue, R. Chüjö, and T. Asakura, Polymer 29 138-43 (1988). and Chujo R, et al, Polymer 35 339 (1994).

(14) The NMR-measurement was used for determining the mmmm pentad concentration in a manner well known in the art.

(15) Number average molecular weight (M.sub.n), weight average molecular weight (M.sub.w) and molecular weight distribution (MWD) are determined by Gel Permeation Chromatography (GPC) according to the following method:

(16) The weight average molecular weight Mw and the molecular weight distribution (MWD=Mw/Mn wherein Mn is the number average molecular weight and Mw is the weight average molecular weight) is measured by a method based on ISO 16014-1:2003 and ISO 16014-4:2003. A Waters Alliance GPCV 2000 instrument, equipped with refractive index detector and online viscosimeter was used with 3×TSK-gel columns (GMHXL-HT) from TosoHaas and 1,2,4-trichlorobenzene (TCB, stabilized with 200 mg/L 2,6-Di tert butyl-4-methyl-phenol) as solvent at 145° C. and at a constant flow rate of 1 mL/min 216.5 μL of sample solution were injected per analysis. The column set was calibrated using relative calibration with 19 narrow MWD polystyrene (PS) standards in the range of 0.5 kg/mol to 11 500 kg/mol and a set of well characterized broad polypropylene standards. All samples were prepared by dissolving 5-10 mg of polymer in 10 mL (at 160° C.) of stabilized TCB (same as mobile phase) and keeping for 3 hours with continuous shaking prior sampling in into the GPC instrument.

(17) MFR.sub.2 (230° C.) is measured according to ISO 1133 (230° C., 2.16 kg load).

(18) Intrinsic viscosity is measured according to DIN ISO 1628/1, October 1999 (in Decalin at 135° C.).

(19) The xylene solubles (XCS, wt.-%): Content of xylene cold solubles (XCS) is determined at 25° C. according ISO 16152/2005.

(20) The hexane extractable fraction is determined according to FDA method (federal registration, title 21, Chapter 1, part 177, section 1520, s. Annex B) oncast films of 100 μm thickness produced on a monolayer cast film line with a melt temperature of 220° C. and a chill roll temperature of 20° C. The extraction was performed at a temperature of 50° C. and an extraction time of 30 min.

(21) Comonomer content, especially ethylene content is measured with Fourier transform infrared spectroscopy (FTIR) calibrated with .sup.13C-NMR. When measuring the ethylene content in polypropylene, a thin film of the sample (thickness about 250 μm) was prepared by hot-pressing. The area of absorption peaks 720 and 733 cm.sup.−1 for propylene-ethylene-copolymers was measured with Perkin Elmer FTIR 1600 spectrometer. Propylene-1-butene-copolymers were evaluated at 767 cm.sup.−1. The method was calibrated by ethylene content data measured by .sup.13C-NMR. See also “IR-Spektroskopie für Anwender”; WILEY-VCH, 1997 and “Validierung in der Analytik”, WILEY-VCH, 1997

(22) Melting temperature (T.sub.m) and heat of fusion (H.sub.f), crystallization temperature (T.sub.c) and heat of crystallization (H.sub.c): measured with Mettler TA820 differential scanning calorimetry (DSC) on 5 to 10 mg samples. DSC is run according to ISO 3146/part 3/method C2 in a heat/cool/heat cycle with a scan rate of 10° C./min in the temperature range of +23 to +210° C. Crystallization temperature and heat of crystallization (H.sub.c) are determined from the cooling step, while melting temperature and heat of fusion (H.sub.f) are determined from the second heating step

(23) Transparency, haze and clarity were determined according to ASTM D1003-00 on 60×60×1 mm.sup.3 plaques injection molded in line with EN ISO 1873-2 using a melt temperature of 200° C. and on cast films of 50 μm thickness produced on a monolayer cast film line with a melt temperature of 220° C. and a chill roll temperature of 20° C.

(24) Flexural Modulus: The flexural modulus was determined in 3-point-bending according to ISO 178 on 80×10×4 mm.sup.3 test bars injection molded at 23° C. in line with EN ISO 1873-2.

(25) Charpy notched impact strength is determined according to ISO 179 2C/DIN 53453/1eA at 23°, and at −20° C. by using an 80×10×4 mm.sup.3 test bars injection molded in line with EN ISO 1873-2.

(26) Tensile moduli in machine and transverse direction were determined according to ISO 527-3 at 23° C. on 130 μm cast films produced on a monolayer cast film line with a melt temperature of 220° C. and a chill roll temperature of 20° C. Testing was performed at a cross head speed of 1 mm/min.

(27) Relative Total Penetration Energy:

(28) The impact strength of films is determined by the “Dynatest” method according to ISO 7725-2 at 0° C. on cast films with a thickness of 130 μm produced on a monolayer cast film line with a melt temperature of 220° C. and a chill roll temperature of 20° C. The value “Wbreak” [J/mm] represents the relative total penetration energy per mm thickness that a film can absorb before it breaks divided by the film thickness. The higher this value, the tougher the material is.

2. Examples

(29) The catalyst used in the polymerization process for inventive examples 1 and 2 was the commercial BCF20P catalyst (1.9 wt % Ti-Ziegler-Natta-catalyst as described in EP 591 224) of Borealis AG with triethyl-aluminium (TEA) as co-catalyst and dicyclo pentyl dimethoxy silane as donor. The aluminium to donor ratio is indicated in table 1.

(30) The resulting polymers were visbroken in a co-rotating twin-screw extruder (type: Coperion ZSK 57) with suitable amounts of 2,5-dimethyl-2,5-di-(tert.butylperoxy)hexane (Trigonox® 101 supplied by AKZO Nobel, Netherlands). As additives 0.05 wt. % calcium stearate (Calcium stearate SP supplied by Faci, Italy) and 0.10 wt % Irganox B 215 (1:2-blend of Irganox 1010 (Pentaerythrityl-tetrakis(3-(3′,5′-di-tert.butyl-4-hydroxytoluyl)-propionate and tris(2,4-di-t-butylphenyl) phosphate) phosphite) of BASF AG, Germany were added to the polymers in the same step.

(31) Comparative example 1 is the commercial grade Borsoft SD233CF produced by Borealis being an ethylene-propylene random-heterophasic copolymer for cast film applications.

(32) TABLE-US-00001 TABLE 1 Process conditions IE 1 IE 2 CE 1 A1/donor ratio [mol/mol] 10 13.9 Loop H2/C3 ratio [mol/kmol] 0.98 1.46 C2/C3 ratio [mol/kmol] 4.4 8.9 MFR.sub.2 [g/10 min] 1.25 1.3 8.0 XCS [wt.-%] 4.1 8.2 n.d. C2 [wt.-%] 2.1 4.5 2.5 GPR 1 H2/C3 ratio [mol/kmol] 14.1 22 MFR.sub.2 of GPR 1 [g/10 min] 1.5 2.1 8.0 MFR.sub.2 total MFR.sub.2 1.3 1.75 8.0 XCS of GPR 1 [wt.-%] 38 46 n.d. XCS [wt.-%] 26.5 27.9 C2 of GPR 1 [wt.-%] 10.5 9.8 5.0 C2 total [wt.-%] 7.1 7.3 4.0 GPR 2 C2/C3 ratio [mol/kmol] 467 439 H2/C2 ratio [mol/kmol] 250 250 MFR.sub.2 of GPR 2 [g/10 min] 1.6 1.9 3.5 MFR.sub.2 [g/10 min] 1.3 1.6 7   XCS of GPR 2 [wt.-%] 100 100 n.d. XCS [wt.-%] 41.7 42.1 C2 of XCS [wt.-%] 21.6 24.5 IV of XCS [dl/g] 1.9 1.6 C2 of GPR 2 [wt.-%] 32.1 35.4 30.7  C2 content [wt.-%] 12.1 12.9 8.0 Split Loop/GPR [wt.-%] 32/48/20 38/43/20 34/51/15 1/GPR 2 MFR.sub.2 after [g/10 min] 7.4 9.7 7.5 visbreaking

(33) TABLE-US-00002 TABLE 2 Properties IE 1 IE 2 CE 1 Tm [° C.] 142 133 139 Hm [J/g] 60.8 63.8 72.0 Tc [° C.] 102 94 98.9 Hc [J/g] 54.7 56.1 60.9 C2 tot [wt.-%] 11.7 11.8 8.5 XCS/wt % [wt.-%] 39.7 37.0 20.9 IV of XCS [dl/g] 1.64 1.07 1.5 C2 of XCS [wt.-%] 23.4 25.7 28.3 C6 (FDA). 100 μm CF [wt.-%] 6.9 5.0 3.5 Flex. Mod. 23° C. [MPa] 259 239 480 Charpy NIS. 23° C. [kJ/m.sup.2] 77.3 76.46 12.8 Charpy NIS. −20° C. [kJ/m.sup.2] 2.12 2.09 1.6 Haze (IM) [%] 40 45 69 Transparency (IM) [%] 82 82 83 Clarity (IM) [%] 97 97 93 Haze (film) [%] 4.0 3.6 3.8 Transparency (film) [%] 94 94 93 Clarity (film) [%] 97 94 93 Tens. Mod. (film, MD). 23° C. [MPa] 179 171 320 Tens. Mod. (film, TD). 23° C. [MPa] 151 148 270 Wbreak (Dynatest) 0° C. [J/mm] 17 15 15