Reinforced thermoplastic polyolefin elastomer film

Patent metadata

Field	Value
Publication number	US-10954367-B2
Application number	US-201716320736-A
Country	US
Kind code	B2
Filing date	Aug 11, 2017
Priority date	Aug 11, 2016
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A thermoplastic polyolefin elastomer film includes a continuous phase that includes a thermoplastic polyolefin elastomer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains, wherein each discrete domain is elongated with a long axis, wherein the axes are aligned in the machine direction (MD) when the film is relaxed, and wherein the axes are aligned in the cross direction (CD) when the film is stretched in the CD. Also, an article includes the thermoplastic polyolefin elastomer film.

First claim

What is claimed is:

1. A thermoplastic polyolefin elastomer film comprising: a continuous phase that includes a thermoplastic polyolefin elastomer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains, wherein each discrete domain is elongated with a long axis, wherein the axes are aligned in a machine direction (MD), and wherein the axes are aligned in a cross direction (CD) when the film is stretched in the CD and reversibly re-orient to return to be aligned in the MD when the film is relaxed.

2. The film of claim 1 , wherein the nanoinclusion additive includes a plurality of nanoinclusions having an average cross-sectional dimension of about 800 nanometers or less.

3. The film of claim 1 , wherein the polyolefinic elastomer is a polypropylene elastomer.

4. The film of claim 1 , wherein the nanoinclusion additive is a terpolymer of ethylene, acrylic ester, and glycidyl methacrylate.

5. The film of claim 1 , wherein the nanoinclusion additive constitutes from about 0.05 wt. % to about 20 wt. % of the film, based on the weight of the continuous phase.

6. The film of claim 1 , further comprising a microinclusion additive dispersed within the continuous phase in the form of discrete domains.

7. The film of claim 6 , wherein the microinclusion additive is a polymer.

8. The film of claim 7 , wherein the polymer of the microinclusion additive is a styrenic copolymer, functionalized polyolefin, or polyester.

9. The film of claim 7 , wherein the polymer of the microinclusion additive is polylactic acid.

10. The film of claim 1 , wherein the nanoinclusion additive is a polymer having a nonpolar component.

11. The film of claim 10 , wherein the polymer is a microcrystalline polyolefin wax.

12. The film of claim 10 , wherein the polymer further contains a polar component.

13. The film of claim 10 , wherein the polymer is a functionalized polyolefin.

14. The film of claim 13 , wherein the functionalized polyolefin is a polyepoxide.

15. The film of claim 1 , wherein the thermoplastic polyolefin elastomer film further comprises a compatibilizer.

16. The film of claim 1 , wherein the thermoplastic polyolefin elastomer film further comprises an interphase modifier.

17. An article comprising a polyolefinic elastomeric film including a continuous phase that includes a thermoplastic polyolefin elastomer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains, wherein each discrete domain is elongated with a long axis, wherein the axes are aligned in a machine direction (MD) when the film is relaxed, and wherein the axes are aligned in a cross direction (CD) when the film is stretched in the CD and reversibly re-orient to return to be aligned in the MD when the film is relaxed.

18. The article of claim 17 , wherein the article is a laminate.

19. The article of claim 17 , wherein the article is a package.

20. The article of claim 17 , wherein the article is an absorbent article.

Assignees

• Kimberly Clark Co

Inventors

• Zhou Peiguang
• Lee Wanduk
• Nhan Davis Dang H
• Topolkaraev Vasily A
• Shlepr Michael G

Classifications

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C08L23/14

  Copolymers of propene (C08L23/16 takes precedence) · CPC title

• C08L23/12 Primary

  Polypropene · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• C08J2323/14

  Copolymers of propene (C08J2323/16 takes precedence) · CPC title