Low Coefficient of Friction Ethylene-Based Compositions

• US 20200131351A1
• Filed: 06/04/2018
• Published: 04/30/2020
• Est. Priority Date: 06/09/2017
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Inventors: Sharma, Rahul, Lee, Jong-Young, Weinhold, Jeffrey D., Kapur, Mridula Babli
• Granted Patent: US 11,466,147 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 15/043 of metal B32B15/01 takes precedence
• CPC Class Codes: B32B 15/06 of natural rubber or synthetic rubber
• CPC Class Codes: B32B 15/082 comprising vinyl resins; comprising acrylic resins
• CPC Class Codes: B32B 15/085 comprising polyolefins
• CPC Class Codes: B32B 15/088 comprising polyamides
• CPC Class Codes: B32B 15/09 comprising polyesters
• CPC Class Codes: B32B 15/12 of paper or cardboard
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2250/04 4 layers
• CPC Class Codes: B32B 2250/05 5 or more layers
• CPC Class Codes: B32B 2250/242 All polymers belonging to those covered by group B32B27/32
• CPC Class Codes: B32B 2250/248 All polymers belonging to those covered by group B32B25/00
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/31 Heat sealable
• CPC Class Codes: B32B 2307/538 Roughness
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 2307/744 Non-slip, anti-slip
• CPC Class Codes: B32B 2307/746 Slipping, anti-blocking, low friction
• CPC Class Codes: B32B 2439/70 Food packaging
• CPC Class Codes: B32B 25/042 : of natural rubber or synthetic rubber
• CPC Class Codes: B32B 25/06 : of paper or cardboard
• CPC Class Codes: B32B 25/08 : of synthetic resin
• CPC Class Codes: B32B 25/16 : comprising polydienes homopolymers or poly-halodienes homopolymers B32B25/12 takes precedence
• CPC Class Codes: B32B 2553/00 : Packaging equipment or accessories not otherwise provided for
• CPC Class Codes: B32B 27/08 : of synthetic resin
• CPC Class Codes: B32B 27/10 : of paper or cardboard
• CPC Class Codes: B32B 27/20 : using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/22 : using plasticisers
• CPC Class Codes: B32B 27/306 : comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/327 : comprising polyolefins obtained by a metallocene or single-site catalyst
• CPC Class Codes: B32B 27/34 : comprising polyamides
• CPC Class Codes: B32B 27/36 : comprising polyesters
• CPC Class Codes: B32B 29/005 : next to another layer of paper or cardboard layer
• CPC Class Codes: C08K 5/20 : Carboxylic acid amides
• CPC Class Codes: C08L 2203/16 : used for films
• CPC Class Codes: C08L 2205/025 : containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• CPC Class Codes: C08L 2207/062 : HDPE
• CPC Class Codes: C08L 2207/064 : VLDPE
• CPC Class Codes: C08L 23/0815 : Copolymers of ethene with aliphatic 1-olefins

Abstract

The present disclosure provides a composition containing a polymeric blend. The polymeric blend contains (A) from 50 wt % to 90 wt % of a first ethylene-based polymer having a density from 0.895 g/cc to 0.905 g/cc; and a melt index from 0.1 g/10 min to 50 g/10 min; (B) from 8 wt % to 48 wt % of a second ethylene-based polymer having a density from 0.935 g/cc to 0.967 g/cc; and a melt index from 0.1 g/10 min to 180 g/10 min; and from 0.01 wt % to 2.0 wt % of a slip agent, based on the total weight of the polymeric blend. The polymeric blend has (i) an overall density from 0.900 g/cc to 0.925 g/cc; and (ii) a coefficient of friction (COF) after aging for 1 week at 60° C. from 0.001 to 0.400. The present disclosure also provides a multilayer film with a first layer containing the composition.

Claims

1. A composition comprising:

a polymeric blend comprising

(A) from 50 wt % to 90 wt % of a first ethylene-based polymer having a density from 0.895 g/cc to 0.905 g/cc; and

a melt index from 0.1 g/10 min to 50 g/10 min;

(B) from 8 wt % to 48 wt % of a second ethylene-based polymer having a density from 0.935 g/cc to 0.967 g/cc; and

a melt index from 0.1 g/10 min to 180 g/10 min;

(C) from 0.01 wt % to 2.0 wt % of a slip agent, based on the total weight of the polymeric blend;

the polymeric blend having (i) an overall density from 0.900 g/cc to 0.925 g/cc; and

(ii) a coefficient of friction (COF) after aging for 1 week at 60°

C. from 0.001 to 0.400.

2. The composition of claim 1, wherein the polymeric blend has a difference between the density of the first ethylene-based polymer and the density of the second ethylene-based polymer (A Density) from 0.039 g/cc to 0.065 g/cc.

3. The composition of claim 1, wherein the polymeric blend has a difference between the melt index of the first ethylene-based polymer and the melt index of the second ethylene-based polymer (Δ

MI) from 0 g/10 min to 155 g/10 min.

4. The composition of claim 1, wherein the slip agent is selected from the group consisting of a fatty acid amide, a silicone, and combinations thereof.

5. The composition of claim 1, wherein the slip agent is a fatty acid amide.

6. The composition of claim 1, wherein the first ethylene-based polymer is an ethylene/octene copolymer having a density from 0.897 g/cc to 0.902 g/cc, and the second ethylene-based polymer is an ethylene/octene copolymer having a density from 0.942 g/cc to 0.958 g/cc.

7. The composition of claim 1, wherein the polymeric blend comprises:

(A) from 50 wt % to 85 wt % of the first ethylene-based polymer, the first ethylene-based polymer having a density from 0.897 g/cc to 0.902 g/cc;

(B) from 8 wt % to 30 wt % of the second ethylene-based polymer, the second ethylene-based polymer having a density from 0.942 g/cc to 0.958 g/cc;

(C) from 0.01 wt % to 2.0 wt % erucamide; and

the overall density of the polymeric blend is from 0.905 g/cc to 0.920 g/cc.

8. A multilayer film comprising a first layer comprising the composition of claim 1.

9. The multilayer film of claim 8, wherein the first layer has a coefficient of friction (COF) after aging for 1 week at 60°

C. from 0.050 to 0.400.

10. The multilayer film of claim 8, wherein the first layer has an initial COF from 0.001 to 0.400.

11. The multilayer film of claim 8, wherein the first layer has an initial surface roughness from 10 nm to 40 nm.

12. The multilayer film of claim 8, wherein the first layer has a surface roughness after aging for 1 week at 60°

C. from 10 nm to 45 nm.

13. The multilayer film of claim 8, wherein the first layer has a light transmission from 90% to 100% and a haze from 0.5% to 30%.

14. The multilayer film of claim 8, wherein the first layer is a seal layer.