Improvements in flex oxygen barrier properties of polymeric films by microlayer coextrusion

被引：7

作者：

Lee, Patrick C. ^{[1
,7
]}

Dooley, Joseph ^{[2
]}

Robacki, Jeff ^{[3
,4
,5
]}

Jenkins, Steve ^{[6
]}

Wrisley, Robert ^{[7
]}

机构：

[1] Dow Chem Co USA, Core R&D, Midland, MI 48667 USA

[2] Dow Chem Co USA, Res & Dev Org, Dows Mat & Parts Proc Grp, Core R&D Org, Midland, MI 48667 USA

[3] Dow Chem Co USA, Business Units, Midland, MI 48667 USA

[4] Dow Chem Co USA, Core R&D Leadership, Midland, MI 48667 USA

[5] Dow Chem Co USA, Corp Management Enable Project Platforms Proc & P, Midland, MI 48667 USA

[6] Dow Chem Co USA, Performance Packaging R&D Grp, Midland, MI 48667 USA

[7] Dow Chem Co USA, Midland, MI 48667 USA

来源：

JOURNAL OF PLASTIC FILM & SHEETING | 2014年 / 30卷 / 03期

关键词：

Coextrusion; microlayer; nanolayer; EVOH; oxygen transmission rate; barrier; flex resistance; DIE;

D O I：

10.1177/8756087913506728

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study describes a process technology to maintain or improve the gas barrier property of ethylene vinyl alcohol (EVOH) barrier films after flexing. EVOH and polyethylene-grafted maleic anhydride (PE-g-MA) multi-and microlayer samples with 5, 19, and 35 layers were produced in a coextrusion line. Flexing was performed using a Gelbo flex tester (400 flexes). After flexing, pin hole tests were performed on the film and only those with fewer than two pin holes were re-tested for oxygen transmission rate (OTR). Pin holes decreased after 400 Gelbo flexes as the number of layers increased. The OTR on these films demonstrated that thin EVOH barrier layers can improve film flex crack resistance. This proves that for a given barrier resin total thickness the flex barrier property can be increased dramatically by microlayering.

引用

页码：234 / 247

页数：14

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