# US 10,870,714 B2 · Cast films, and articles made therefrom

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- Number: US 10,870,714 B2
- Document ID: US10870714B2
- Status: Granted
- Kind: B2
- Application number: 16/066,868
- Filed: 2017-01-25
- Published: 2019-01-03
- Granted: 2020-12-22
- Earliest claimed: 2016-02-12
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Rajen M. Patel; Jacquelyn A. Degroot; Fabricio Arteaga Larios; Selim Bensason; Teresa P. Karjala; Mehmet Demirors; Chuan Yar Lai
- Web page: https://patentgrep.com/patent/US10870714B2

## CPC

- C08F 10/02: Ethene
- A61L 15/24: Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)}
- A61L 31/048: {obtained by reactions only involving carbon-to-carbon unsaturated bonds (A61L31/041 takes precedence)}
- B32B 5/022: {Non-woven fabric}
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- C08J 5/18: Manufacture of films or sheets
- C08L 23/04: Homopolymers or copolymers of ethene
- C08L 23/08: Copolymers of ethene (C08L23/16 takes precedence)
- C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers
- C08J 2323/06: Polyethene
- C08J 2323/08: Copolymers of ethene (C08J2323/16 takes precedence)
- C08K 2003/2241: {Titanium dioxide}
- C08L 2205/02: containing two or more polymers of the same C08L -group
- C08L 2207/066: LDPE (radical process)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

Disclosed herein is a cast film comprising a polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers, wherein said polyethylene composition is characterized by the following properties: a melt index, I2, measured according to ASTM D1238 (2.16 kg, 190° C.), of from 1 to 20 g/10 min; a density (measured according to ASTM D792) of from 0.935 to 0.970 g/cm3; a melt flow ratio, I10/I2, wherein I10 is measured according to ASTM D1238 (10 kg, 190° C.) of from 5.5 to 7.0; a molecular weight distribution (Mw/Mn) of from 2.2 to 3.5; and a vinyl unsaturation of greater than 0.12 vinyls per one thousand carbon atoms present in the backbone of the composition.

## Claims

### Claim 1

A cast film comprising a polyethylene composition comprising a reaction product of ethylene and optionally one or more alpha-olefin comonomers, wherein said polyethylene composition is characterized by the following properties:
a. a melt index, 12, measured according to ASTM D 1238 (2.16 kg, 190° C.), of from 1 to 20 g/10 min;
b. a density (measured according to ASTM D792) of from 0.940 to 0.970 g/cm3;
c. a melt flow ratio, I10/I2, wherein I10 is measured according to ASTM D1238 (10 kg, 190° C.) of from 5.5 to 7.0;
d. a molecular weight distribution (Mw/Mn) of from 2.2 to 3.5; and
e. a vinyl unsaturation of greater than 0.12 vinyls per one thousand carbon atoms present in a backbone of the polyethylene composition;
and wherein the cast film further comprises a low density polyethylene having a melt index, I2 range of from 0.1 to 20 g/10 min.

### Claim 2 (depends on 1)

The cast film of claim 1, wherein the cast film comprises from 5 to 30% of the low density polyethylene.

### Claim 3 (depends on 1)

The cast film of claim 1, wherein the polyethylene composition is formed in the presence of a catalyst composition comprising a multi-metallic procatalyst via solution polymerization in at least one reactor.

### Claim 4 (depends on 3)

The cast film of claim 3, wherein the solution polymerization occurs in a single reactor.

### Claim 5 (depends on 3)

The cast film of claim 3, wherein the polyethylene composition has a metal catalyst residual of greater than or equal to 1 parts by combined weight of at least three metal residues per one million parts of polyethylene polymer, wherein the at least three metal residues are selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, and combinations thereof, and wherein each of the at least three metal residues is present at greater than or equal to 0.2 ppm.

### Claim 6 (depends on 3)

The cast film of claim 3, wherein the multi-metallic procatalyst has an Al:Ti ratio of from 6 to 15.

### Claim 7 (depends on 1)

The cast film of claim 1, wherein the cast film is a monolayer film.

### Claim 8 (depends on 1)

The cast film of claim 1, wherein the cast film is a multilayer film.

### Claim 9 (depends on 1)

The cast film of claim 1, wherein the cast film is a cast embossed film.

### Claim 10 (depends on 1)

A laminate comprising the cast film of claim 1.

### Claim 11 (depends on 1)

An article made from the cast film according to claim 1.