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Process of manufacturing film containing evoh

A multi-layer film and polymer technology, applied in chemical instruments and methods, transportation and packaging, synthetic resin layered products, etc., can solve the problems of high cost of film products, difficulty in maintaining technical specifications, and difficulty in reusing films

Inactive Publication Date: 2012-05-16
JINDAL FILMS AMERICAS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, EVOH-containing membranes cavitated with polybutylene terephthalate (PBT) as a cavitation agent are difficult to recycle
Membranes prepared by recycling trimmed scraps containing EVOH membranes cavitated with PBT tend to crack due to degradation of the recycled material and have difficulty maintaining specifications on specifications
Without a recycle step, the membrane preparation method is unacceptably low in benefit and the membrane product cost is high

Method used

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Examples

Experimental program
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Embodiment Construction

[0014] This application discloses various specific embodiments, versions, and examples, including exemplary embodiments and uses, in order to understand the definition of the claimed invention. While the following detailed description sets forth specific preferred embodiments, those skilled in the art will appreciate that this is merely an exemplary embodiment and that the invention may be practiced in other ways. The scope of the specification is intended to determine infringement by virtue of any one or more of the appended claims, including their equivalents, and elements or limitations that are equivalent to those recited. Any reference to "the present invention" may relate to one or more, but not necessarily all, inventions as defined in the claims.

[0015] As used herein, the term "monomer" is a small molecule that can chemically bond to other monomers to form a polymer. Examples of monomers include ethylenic monomers such as ethylene, propylene, butene, 1-hexene, styr...

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PUM

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Abstract

This disclosure relates to a process of manufacturing polymeric film, the process comprises (a) co-extruding (i) a first polymeric composition having a non-organic cavitating agent, (ii) a second polymeric composition having EVOH to form a multilayer sheet; and (b) orienting the co-extruded sheet in MD, TD or both, wherein the first polymeric composition and / or the second polymeric composition comprises recycled polymeric composition having EVOH and the non-organic cavitating agent.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 184,121, filed June 4, 2009, the contents of which are incorporated by reference in their entirety. technical field [0003] The present disclosure relates to methods of making films comprising ethylene vinyl alcohol copolymer (EVOH). In particular, the method includes recycling EVOH-containing material produced by in-line trimming and / or recycling membrane material. Background technique [0004] Polymer films are used for packaging or labeling purposes. Polymeric films for packaging or labeling comprise one or more polymeric layers which are extruded or coextruded of polymeric resins to form polymeric sheets which are subjected to further Further processing such as production by orientation in the machine direction (MDO) or transverse direction (TDO) or both directions. For some applications, at least a single layer of the membrane is cavitate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/06B32B27/08C08J5/18C08L29/04C08K3/26B29C48/08B29C48/17B29C48/18B29C48/21
CPCB29C47/065B29C55/023B32B27/08B29C47/06B29C47/043B32B27/30B29K2029/00B32B27/20B29C55/005B29C47/0021B29K2105/04B29B17/0005B32B27/32B29K2067/006B29K2105/16Y02W30/62B32B27/18B32B27/205B32B27/306B32B2250/24B32B2264/10B32B2270/00B32B2272/00B32B2307/514B32B2307/546B32B2307/7244B32B2307/75B32B2519/00B32B2553/00B29C48/08B29C48/17B29C48/18B29C48/21B29C48/0022B29C48/277Y10T428/31855Y10T428/31909Y02P70/10
Inventor K·M·多诺万D·A·列斯特曼R·弗吉斯E·T·格尔R·F·布雷J·T·福特
Owner JINDAL FILMS AMERICAS LLC