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1. WO2020112526 - FILM À BASE DE POLYMÈRE AYANT DES PROPRIÉTÉS ÉQUILIBRÉES

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A film comprising:

20.0 weight percent to 69.5 weight percent linear low density polyethylene (LLDPE) based polymer, wherein the LLDPE based polymer comprises

a high density fraction (HDF) from 3.0% to 8.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integration at temperatures from 93 °C to 119 °C,

an I10/I2 ratio from 5.5 to 6.9, wherein I2 is the melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190 °C and I10 is the melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190 °C, and

a short chain branching distribution (SCBD) of less than or equal to 8.0 °C, wherein the short chain branching distribution is measured by CEF full width at half height;

0.0 weight percent to 10.0 weight percent low density polyethylene (LDPE) based polymer; and

30.0 weight percent to 70.0 weight percent pore former.

2. A film according to claim 1, wherein the film comprises from 40.0 weight percent to 60.0 weight percent LLDPE based polymer.

3. A film according to any one of claims 1 and 2, wherein the LLDPE based polymer has a zero shear viscosity ratio from 1.1 to 3.0.

4. A film according to any one of claims 1 to 3, wherein the LLDPE based polymer has a I10/I2 ratio from 5.5 to 6.5.

5. A film according to any one of claims 1 to 4, wherein the LLDPE based polymer has a density of 0.910 to 0.925 g/cm3, wherein density is measured according to ASTM D792, Method B.

6. A film according to any one of claims 1 to 5, wherein the LLDPE based polymer has an h from 1.0 to 6.0 g/10 mins, wherein h is measured according to ASTM D 1238 at a load of 2.16 kg.

7. A film according to any one of claims 1 to 6, wherein the LLDPE based polymer has an h from 3.0 to 4.0 g/10 mins.

8. A film according to any one of claims 1 to 7, wherein the film is a machine-direction oriented film.

9. A film according to claim 8, wherein the film has a machine-direction orientation ratio from 2.5x to 6. Ox, wherein machine-direction orientation ratio is calculated as ratio of the velocity of the film existing the MDO unit to the velocity of the film entering the MDO unit

10. A film according to any one of claims 1 to 9, wherein the film has an average machine-direction tear greater than or equal to 5.0 gf, wherein the average machine-direction tear is measured according to Elmendorf Tear ASTM D 1922 measured at 14 gsm.

11. A film according to any one of claims 1 to 10, wherein the film has an average machine-direction force at 10% elongation of greater than or equal to 16.0 Newtons, wherein average machine-direction force at 10% elongation is measured according to ASTM D 638 at a tensile speed of 20 inch/minute and measured at 14 gsm.

12. A film according to any one of claims 1 to 11, wherein the film has an average water vapor transmission rate of greater than or equal to 15,000 g/m2/day wherein average water vapor transmission rate is measured according to ASTM D6701 measured at 14 gsm, 100% RH, and 38 °C.

13. A film according to any one of claims 1 to 12, wherein the film has a hydrostatic pressure of greater than or equal to 120 cm water, wherein the hydrostatic pressure is measured according to ISO 1420 measured at 14 gsm.

14. A film according to any one of claims 1 to 13, wherein

the film has a loudness of less than 5.9 sones, wherein the loudness is measured at gsm and a machine direction orientation ratio of less than or equal to 5.2x, or

the film has a loudness of less than 6.3 sones, wherein the loudness is measured at gsm and a machine direction orientation ratio greater than 5.2x and less than or equal to 5.8x.

15. A hygiene absorbent product comprising the film according to any one of claims 1 4.