Oxygen barrier plastic material

An oxygen barrier and oxygen scavenging technology, applied in the field of plastic materials and products, which can solve the problems of poor moisture or UV-Vis activation requirements, compromised film mechanical properties, and lack of clarity.

Pending Publication Date: 2019-04-02
CLARIANT PLASTICS & COATINGS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these systems have at least one or several disadvantages including poor processing properties, compromise of film mechanical properties, lack of barrier effect if exposed to a certain relative humidity or temperature, insufficient absorption of oxygen, moisture or UV - Visible activation needs and most of them also have poor clarity and lack of recyclability

Method used

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Examples

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Embodiment

[0146] All produced samples were 107 to 128 μm five-layer cast films with LDPE / bond / EVOH / bond / LDPE structure and respective thicknesses of 50 μm / 6 μm / 5 to 7 μm / 6 μm / 50 μm. This multilayer system is equivalent to figure 1 A three-layer system, but with two additional adhesive layers (tie layers).

[0147]In all constructions the low density polyethylene used is LDPE 2420 (LyondellBasell), whose M.F.I. is 4g / 10min, 190°C, 2.16Kg; the density is (ASTMD3236-88). The ethylene-vinyl alcohol copolymer (EVOH) used is H171B, with an ethylene content of 38mol%, its M.F.I. is 1.7g / 10min, 190°C, 2.16Kg; density is 1.17g / cm 3 (ISO 1183). The binder resin used is AT1707 (Mitsui), its M.F.I. is 4.3g / 10min, 190°C, 2.16Kg; density is 0.91g / cm 3 (ASTM D1505).

[0148] The weight % mentioned in the following examples is based on the total weight of the mixture, composition or product; parts are parts by weight;

[0149] Unless otherwise indicated, "ex" means example; "cpex" mean...

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Abstract

The invention relates to a multilayer packaging film comprising at least three different types of layers (A), (B), and (C): (A) is at least one outer layer, (B) is at least one passive oxygen barrierlayer, (C) is at least one active oxygen scavenging layer, characterized in that - the at least one outer layer (A) is a thermoplastic polymer; - the at least one passive oxygen barrier layer (B) is selected from the group consisting of ethylene vinyl alcohol copolymers, polyvinylchloride, copolymers of polyvinyl chloride, polyvinyl alcohol, polyvinylidene dichloride, copolymers of polyvinylidenedichloride, polyacrylonitrils, copolymers of polyacrylonitrils, polyethylene terephthalate, polyethylene naphthalate, polyethylenefuranoate, polysiloxanes, and polyamides; - the at least one active oxygen scavenging layer (C) comprises a) a plastic material which is a polyolefin, a polyolefin copolymer or a polystyrene, and additives (b) and (c), wherein b) is a polyterpenic resin; and c) is a transition metal catalyst.

Description

technical field [0001] The present invention relates to oxygen barrier plastic materials comprising organic polymers and polyterpenic resin active oxygen barriers to enhance the quality and shelf life of oxygen sensitive products in packaging applications. The present invention also relates to oxygen barrier plastic materials that can be processed into multilayer rigid containers or flexible films to impart oxygen barrier properties at enhanced clarity compared to other oxygen barrier compositions known in the art. Furthermore, the invention relates to the use of the oxygen barrier composition in food, beverage and pharmaceutical packaging and to plastic materials and articles comprising said oxygen barrier composition. [0002] For the purposes of the present invention, a masterbatch (MB) is a composition comprising a polymeric or liquid carrier and additives, wherein said additives are present in a higher concentration than in the final application or in the final product m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B9/02B32B27/06B32B27/18B32B27/28B32B27/30B32B27/32B32B27/34B32B27/36
CPCB32B9/02B32B27/06B32B27/08B32B27/283B32B27/302B32B27/304B32B27/306B32B27/308B32B27/32B32B27/34B32B27/36B32B2307/7244B32B2307/74B32B2439/00B32B2439/70B32B2439/80B32B27/18B32B1/02B32B27/20B32B27/28B32B2270/00B32B2250/24B32B2250/05B32B2250/246B32B2250/40B32B2439/40C08J3/22
Inventor A·德科尔特斯T·穆勒
Owner CLARIANT PLASTICS & COATINGS LTD
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