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

A multi-layer co-extrusion, high barrier technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of high manufacturing cost and poor barrier property, reduce production cost, improve gas barrier performance, and improve impact strength Effect

Inactive Publication Date: 2015-11-11
SUZHOU TIPACK
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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 high-barrier multi-layer co-extrusion packaging film, which aims to effectively solve the defects of poor gas barrier property and high manufacturing cost of the current co-extrusion packaging film using a single core layer

Method used

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Examples

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Effect test

Embodiment 1

[0029] combine figure 1 As shown, in the high-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, and the thickness of the first core layer 2, the second core layer 3 and the third core layer 4 Both are 3 microns, and the thickness of the adhesive layer 6 is 3 microns.

[0030] Raw materials for each layer, surface layer 1: polyamide 80kg; first core layer 2: polyamide 50kg; second core layer 3: linear low-density polyethylene 50kg, density 0.90g / cm 3 , the melt index is 0.35g / 10min; the third core layer 4: 98kg vinylidene chloride-maleic anhydride copolymer (melting point 150 ℃, 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...

Embodiment 2

[0033] see figure 1 As shown, in the high-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.

[0034] 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;

[0035] The first core layer 2: polyamide 40kg; the second core layer 3: a mixture of ultra-low density polyethylene 35kg and linear medium density polyethylene 25kg, density 0.915g / cm 3 , the melt index is 0.55g / 10min; the third core layer 4: 98kg vinylidene chloride-maleic anhydride copolymer (melting point 150 ℃, de...

Embodiment 3

[0038] see figure 1 As shown, in the high-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, and the thickness of the first core layer 2, the second core layer 3 and the third core layer 4 Both are 5 microns, and the thickness of the adhesive layer 6 is 5 microns.

[0039] 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;

[0040] The first core layer 2: polyamide 50kg; the second core layer 3: linear medium density polyethylene 50kg, density 0.92g / cm 3 , the melt index is 0.70g / 10min; the third core layer 4: 98kg vinylidene chloride-maleic anhydride copolymer (melting point 150 ℃, density 1.7g / cm 3 ) an...

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Abstract

The invention discloses a high-barrier-property multilayer-co-extrusion packaging film which includes a surface layer, an inner layer and a core layer, wherein the core layer includes a first core layer, a second core layer and a third core layer which are successively bonded to each other through adhesive layers. The thickness ratio of the three core layers is (1-3):(1-5):(1-4). The adhesive layers are also 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 high-barrier multilayer co-extruded packaging film. 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 strong odor and require b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/32B32B27/34B32B27/36B32B7/12B32B33/00B65D65/40
CPCB32B27/08B32B2270/00B32B2307/31B32B2307/40B32B2307/412B32B2307/416B32B2307/54B32B2307/558B32B2307/582B32B2307/7242B32B2307/7244B32B2307/7246B32B2323/00B32B2323/04B32B2323/046B32B2327/00B32B2367/00B32B2377/00
Inventor 史保利冯春谢景泉
Owner SUZHOU TIPACK
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