Degradable high-barrier composite film and preparation method thereof

A high-barrier composite film and degradable polymer technology, applied in the field of packaging films, can solve the problems of complex processing, high price, and difficult recycling of different materials, achieve peel strength between layers, good barrier properties, and ensure compost degradability. Effect

Pending Publication Date: 2022-03-22
RES INST OF ZHEJIANG UNIV TAIZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve a series of shortcomings in the background technology, and specifically solve the problems of complex processing in the field of food composite packaging, difficult recycling of different materials and high prices

Method used

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  • Degradable high-barrier composite film and preparation method thereof
  • Degradable high-barrier composite film and preparation method thereof
  • Degradable high-barrier composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A biodegradable high-barrier composite film has an A / C double-layer structure.

[0038] The layer A has a thickness of 50 μm and is processed from modified polybutylene terephthalate-adipate copolymer particles with an average particle size of 1 mm, an intrinsic viscosity ([η]) of 0.9 dl / g, and a molecular weight of 150,000 become. The A layer includes the following components in parts by weight: 50 parts of polybutylene terephthalate-adipate copolymer, 60 parts of thermoplastic starch, 2 parts of ethylene-methyl acrylate-glycidyl methacrylate, 3.1 parts of ethylene-vinyl acetate copolymer, 1.5 parts of auxiliary materials.

[0039] The C layer has a thickness of 6 μm and contains the following components in parts by mass: 23 parts of polyglycerol sebacate, 17 parts of polylactic acid-caprolactone copolymer, 4 parts of cellulose nanocrystals, and 9 parts of carbon nanotubes , 12.8 parts of trihydroxyethylmethyl quaternary ammonium methyl sulfate, 3.2 parts of N,N-hexa...

Embodiment 2

[0047] A biodegradable high-barrier composite film has an A / B / C three-layer structure.

[0048] The layer A has a thickness of 55 μm, and is processed from modified polybutylene terephthalate-adipate copolymer particles with an average particle size of 3 mm, an intrinsic viscosity ([η]) of 1.2 dl / g, and a molecular weight of 100,000 become. The A layer includes the following components in parts by weight: 103 parts of polybutylene terephthalate-adipate copolymer, 20 parts of thermoplastic starch, 3 parts of γ-aminopropyl triethoxysilane, alginic acid 0.5 parts of sodium, 26.3 parts of auxiliary materials.

[0049] The B layer has a thickness of 400 μm and is made of cellulose film.

[0050] The thickness of the C layer is 230 μm, including the following components in parts by mass: 12 parts of polylactic acid-caprolactone copolymer, 50 parts of polyhydroxyalkanoate, 10 parts of nano-intercalated montmorillonite, 2 parts of carbon nanotubes 5.6 parts of N,N-hexadecylethylmor...

Embodiment 3

[0059] A biodegradable high-barrier composite film has an A / B double-layer structure.

[0060] The layer A has a thickness of 100 μm, and is processed from modified polybutylene terephthalate-adipate copolymer particles with an average particle size of 2 mm, an intrinsic viscosity ([η]) of 1.5 dl / g, and a molecular weight of 180,000 become. The A layer includes the following components in parts by weight: 80 parts of polybutylene terephthalate-adipate copolymer, 30 parts of thermoplastic starch, 6 parts of γ-aminopropyltriethoxysilane, ethylene- 8.6 parts of vinyl acetate copolymer, 35.5 parts of auxiliary materials.

[0061] The B layer has a thickness of 300 μm and is made of paper.

[0062] The preparation method of above-mentioned degradable high-barrier composite film, comprises the following steps:

[0063] S1: Dry the starch with a linearity of 25% at 60°C for 48 hours, weigh it with stearic acid and urea at a ratio of 30:9:4, add it to a high-speed mixer and stir fo...

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Abstract

The invention discloses a degradable high-barrier composite membrane and a preparation method thereof.The composite membrane is of a layer structure of one of A/B, A/C, A/B/C and A/B/A/C. The layer A is a modified poly (butylene terephthalate)-adipate copolymer and comprises, by mass, 50-103 parts of poly (butylene terephthalate)-adipate copolymer, 20-109 parts of thermoplastic starch and 2-10 parts of compatilizer; 0.5 to 10 parts of a tackifier and 1.5 to 42 parts of an auxiliary material; the layer B is paper or a cellulose membrane; and the layer C is a composite material and comprises the following components in parts by mass: 40-150 parts of a full-biodegradable polymer, 12-60 parts of a reinforcing filler, 2-16 parts of an antistatic agent and 0.1-15 parts of an ultraviolet light absorber. The composite film disclosed by the invention has good barrier property and relatively high interlayer peel strength, and can be applied to the field of packaging of liquid and fresh foods.

Description

technical field [0001] The invention relates to a degradable high-barrier composite film and a preparation method thereof, belonging to the field of packaging films. Background technique [0002] High barrier packaging is critical to extending the shelf life and shelf life of food, pharmaceuticals and cosmetics. In order to achieve multiple functions such as water barrier, oxygen barrier, upright, light-proof, low-temperature heat sealing, etc., usually high-barrier packaging uses aluminum foil and plastic film as the barrier layer, polyethylene or polypropylene as the heat-sealing layer and printing layer, and paper as the middle layer , Composite materials formed by dry or extrusion compounding processes. The rapid marketization of paper-aluminum-plastic composite flexible packaging has provided great convenience to people's daily life, but at the same time, composite flexible packaging with different materials and characteristics is difficult to separate and recycle thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/10B32B27/08B32B27/18B32B27/20B32B9/00B32B9/04B32B29/00C08L67/02C08L3/02C08L67/04C08L71/08C08L1/02C08K3/34C08K3/04C08J5/18B29D7/01
CPCB32B27/10B32B27/08B32B27/18B32B27/20B32B9/00B32B9/045B32B29/00C08J5/18B29D7/01C08J2367/02C08J2403/02C08J2303/02C08J2371/08C08J2467/04C08J2367/04C08J2471/08B32B2439/70B32B2307/716B32B2307/7246
Inventor 贺晓艳黄然唐黎盛
Owner RES INST OF ZHEJIANG UNIV TAIZHOU
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