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High-air-barrier-property multilayer-co-extrusion packaging film

A gas barrier, multi-layer co-extrusion technology, used in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of high manufacturing cost and poor gas barrier properties, reduce production costs, improve gas barrier performance, and improve market competition. force effect

Inactive Publication Date: 2015-11-11
SUZHOU TIANJIA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-layer co-extruded packaging film with high gas barrier property, which aims to effectively solve the defects of poor gas barrier property and high manufacturing cost of the current co-extruded packaging film using a single core layer

Method used

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Embodiment 1

[0028] combine figure 1As shown, in the high gas barrier multilayer co-extruded packaging film of this embodiment, the thickness of the surface layer 1: 8 microns, the thickness of the inner layer 5 is 19 microns, the first core layer 2, the second core layer 3 and the third core layer 4 The thicknesses are all 3 microns, and the thickness of the adhesive layer 6 is 3 microns.

[0029] Raw materials for each layer, surface layer 1: polyamide 80kg; first core layer 2: polyamide 50kg; second core layer 3: ethylene-vinyl alcohol copolymer layer 100kg; third core layer 4: 98kg vinylidene chloride-malay Anhydride copolymer (melting point 150°C, density 1.7g / cm 3 ) and 2kg of epoxy soybean oil; inner layer 5: linear low density polyethylene 50kg, density 0.90g / cm 3 , the melt index is 0.35g / 10min; the raw materials of the adhesive layer 6 of each layer are the same, all are 5kg ethylene-vinyl acetate copolymer, and the density is 0.93g / cm 3 .

[0030] The raw materials of each l...

Embodiment 2

[0032] see figure 1 As shown, in the high gas barrier multilayer co-extruded packaging film of this embodiment, the thickness of the surface layer 1 is 9 microns, the thickness of the inner layer 5 is 20 microns, the thickness of the first core layer 2 is 3 microns, and the thickness of the second core layer 3 is 5 microns. The thickness of the third core layer 4 is 4 microns, and the thickness of the adhesive layer 6 is 4 microns.

[0033] Raw materials for each layer, surface layer 1: polyolefin 100kg in total, specifically 60kg ethylene-alpha olefin copolymer (alpha olefin is propylene), density is 0.88g / cm 3 , and 40kg of ethylene-methacrylic acid copolymer;

[0034] The first core layer 2: polyamide 40kg; the second core layer 3: ethylene-vinyl alcohol copolymer layer 80kg; the third core layer 4: 98kg vinylidene chloride-maleic anhydride copolymer (melting point 150 ° C, density 1.7 g / cm 3 ) and 2kg of epoxidized soybean oil; inner layer 5: a mixture of 40kg of linear...

Embodiment 3

[0037] see figure 1 As shown, in the high gas barrier multilayer co-extruded packaging film of this embodiment, the thickness of the surface layer 1: 10 microns, the thickness of the inner layer 5 is 24 microns, the first core layer 2, the second core layer 3 and the third core layer 4 The thicknesses are all 5 microns, and the thickness of the adhesive layer 6 is 5 microns.

[0038] Raw materials for each layer, surface layer 1: 40kg of polyamide, 40kg of polyolefin, 60kg of polyester (polyethylene terephthalate), wherein the polyolefin is specifically 10kg of ethylene-α-olefin copolymer (α-olefin is hexene-1) , with a density of 0.90g / cm 3 , and 30kg of ethylene-vinyl acetate copolymer;

[0039] The first core layer 2: polyamide 50kg; the second core layer 3: ethylene-vinyl alcohol copolymer layer 100kg; the third core layer 4: 98kg vinylidene chloride-maleic anhydride copolymer (melting point 150 ° C, density 1.7 g / cm 3 ) and 2kg of epoxidized soybean oil; inner layer 5...

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Abstract

The invention discloses a high-air-barrier-property multilayer-co-extrusion packaging film which includes a surface layer, an inner layer and a core layer. The core layer includes a first core layer, a second core layer and a third core layer, which are generated through co-extrusion composition, according to the thickness ratio of (1-3):(1-5):(1-4). Adhesive layers are used for respectively bonding the first core layer with the surface layer and the third core layer with the inner layer. The first core layer is a polyamide layer, the second core layer is an ethylene-vinyl alcohol co-polymer layer and the third core layer is a polyvinylidene chloride layer. The third core layer includes a mixture composed of 98 wt% of polyvinylidene chloride and 2 wt% of a processing aid, wherein the polyvinylidene chloride is a vinylidene chloride-maleic anhydride co-polymer, is 150 DEG C in melt point and is 1.7 g / cm<3> in density, and the processing aid is epoxidized soybean oil. In the invention, a polyvinylidene chloride core layer which is single in the prior art is improved, wherein the core layer is formed by compositing three functional core layers including polyamide, the ethylene-vinyl alcohol co-polymer and the polyvinylidene chloride according to the certain thickness ratio, so that the packaging film can improve air-barrier property and is further reduced in production cost by 25-30%.

Description

technical field [0001] The invention relates to a multi-layer co-extrusion packaging film with high gas barrier property. Background technique [0002] Commodity packaging plays an important role in the storage, transportation, quality assurance and beautification of commodities. The traditional packaging methods are mainly carton packaging and bundled packaging. However, with the development of the economy, the advancement of science and technology, the ever-changing products, and the fact that people's lives are becoming more convenient and leisurely, there are higher requirements for product packaging. Based on this, with the emergence of new materials, people began to use polyethylene (PE) packaging film to replace carton packaging and binding, which has many advantages such as saving materials, reducing costs, moisture-proof, hygienic, and convenient to use, but lacks excellent gas barrier properties. . Especially when packaging food (drug) products that have a stron...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/30B32B27/32B32B27/34B32B27/36B32B7/12B32B33/00B65D65/40
CPCB32B27/08B32B2270/00B32B2307/31B32B2307/40B32B2307/406B32B2307/412B32B2307/54B32B2307/558B32B2307/582B32B2307/7242B32B2307/7244B32B2307/7246B32B2323/00B32B2323/04B32B2323/046B32B2327/00B32B2367/00B32B2377/00
Inventor 冯春史保利刘建平
Owner SUZHOU TIANJIA NEW MATERIAL TECH CO LTD
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