# US 2019/0169385 A1 · Blown films having improved haze, and articles made therefrom

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- Number: US 2019/0169385 A1
- Document ID: US20190169385A1
- Status: Published application
- Kind: A1
- Application number: 16/309,975
- Filed: 2017-08-04
- Published: 2019-06-06
- Earliest claimed: 2016-08-11
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Mustafa Bilgen; Mehmet Demirors; Teresa P. Karjala; Nermeen W. Aboelella
- Web page: https://patentgrep.com/patent/US20190169385A1

## CPC

- C08J 5/18: Manufacture of films or sheets
- C08F 110/02: Ethene
- C08F 210/16: Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
- C08L 23/06: Polyethylene
- C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond}
- C08F 2/04: Polymerisation in solution (C08F2/32 takes precedence)
- C08F 2500/03: Narrow molecular weight distribution, i.e. Mw/Mn < 3
- C08F 2500/07: High density, i.e. > 0.95 g/cm3
- C08F 2500/12: Melt flow index or melt flow ratio
- C08F 2500/26: Use as polymer for film forming
- C08J 2323/06: Polyethene
- C08J 2323/08: Copolymers of ethene (C08J2323/16 takes precedence)
- C08L 2203/16: used for films
- 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)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Disclosed herein is a blown film comprising at least 50 wt. % of a polyethylene composition comprising the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties: a melt index, I2, of from 0.1 to 2 g/10 min; a density of from 0.940 to 0.970 g/cm3; a melt flow ratio, I10/I2, of from 5.5 to 7.2; and a molecular weight distribution (Mw/Mn) of from 2.2 to 3.5.

## Claims

### Claim 1

A blown film comprising at least 50 wt. % of a polyethylene composition comprising the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties:
a. a melt index, I2, of from 0.1 to 2 g/10 min;
b. a density of from 0.940 to 0.970 g/cm3;
c. a melt flow ratio, I10/I2, of from 5.5 to 7.2; and
d. a molecular weight distribution (MWD) of from 2.2 to 3.5.

### Claim 2 (depends on 1)

The blown film of claim 1, wherein the polyethylene composition has a vinyl unsaturation of greater than 0.12 vinyls per one thousand carbon atoms.

### Claim 3 (depends on 1)

The blown film of claim 1 wherein the polyethylene composition has a melt index, I2, of from 0.1 to less than 1 g/10 min

### Claim 4 (depends on 1)

The blown film of claim 1, wherein the polyethylene composition has a melt index, I2, of from 0.5 to less than 1.5 g/10 min.

### Claim 5 (depends on 1)

The blown 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 6 (depends on 5)

The blown film of claim 5, wherein the solution polymerization occurs in a single reactor.

### Claim 7 (depends on 1)

The blown film of claim 1, wherein the blown film exhibits a total haze value of less than 30% for a 1 mil monolayer blown film.

### Claim 8 (depends on 1)

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

### Claim 9 (depends on 1)

The blown film of claim 1, wherein the blown film forms one or more layers of a multilayer film.