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Completely degradable biobased heat shrink film

A heat-shrinkable film, complete degradation technology, applied in the field of bio-based heat-shrinkable film, to achieve a good heat shrinkage rate, conducive to sustainable development

Inactive Publication Date: 2017-03-15
TIANJIN GREENBIO MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a fully degradable bio-based heat-shrinkable film, which solves the environmental protection problem of using a large amount of non-renewable petroleum-based raw materials to prepare disposable heat-shrinkable films in the prior art

Method used

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  • Completely degradable biobased heat shrink film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A fully degradable bio-based heat-shrinkable film, the heat-shrinkable film is composed of an inner film and an outer film;

[0042] The outer film is made of raw materials comprising the following parts by weight: 3-hydroxybutyric acid-4-hydroxybutyric acid copolymer (viscosity-average molecular weight 300000, monomer content in the copolymer is 70% and 30% respectively) 40 Parts, 100 parts of outer layer polylactic acid (weight average molecular weight 100000), 10 parts of tributyl citrate; 4 parts of glycidyl methacrylate, 0.8 part of hydrazide nucleating agent;

[0043] The inner film is made of raw materials comprising the following parts by weight: 3-hydroxybutyric acid-4-hydroxybutyric acid polymer (viscosity average molecular weight 350000, monomer content in the copolymer is 80% and 20% respectively) 60 Parts, 50 parts of inner layer polylactic acid (weight average molecular weight: 150000), 15 parts of tributyl citrate; 9.6 parts of laurate, 0.5 part of succin...

Embodiment 2

[0049] A fully degradable bio-based heat-shrinkable film, the heat-shrinkable film is composed of an inner film and an outer film;

[0050] The outer film is made of raw materials comprising the following parts by weight: 3-hydroxybutyric acid-3-hydroxyvaleric acid copolymer (viscosity average molecular weight 300000, monomer content in the copolymer is 85% and 15% respectively) 70 Parts, 70 parts of outer layer polylactic acid (weight average molecular weight 100000), 15 parts of tributyl citrate; 2 parts of glycidyl methacrylate, 0.2 part of boron nitride;

[0051] The inner layer film is made of raw materials comprising the following parts by weight: 3-hydroxybutyric acid-3-hydroxyvaleric acid polymer (viscosity average molecular weight 350000, monomer content in the copolymer is 75% and 25% respectively) 40 Parts, 70 parts of polylactic acid (weight average molecular weight: 150000) in the inner layer, 25 parts of tributyl citrate; 8.5 parts of laurate, 0.5 part of succini...

Embodiment 3

[0057] A fully degradable bio-based heat-shrinkable film, the heat-shrinkable film is composed of an inner film and an outer film;

[0058] The outer film is made of raw materials comprising the following parts by weight: 3-hydroxybutyric acid-3-hydroxyhexanoic acid copolymer (viscosity average molecular weight 250000, monomer content in the copolymer is 90% and 10% respectively) 70 Parts, 70 parts of outer layer polylactic acid (weight average molecular weight 100000), 10 parts of tributyl citrate; 2 parts of glycidyl methacrylate, 0.4 part of boron nitride;

[0059] The inner layer film is made of raw materials comprising the following parts by weight: 3-hydroxybutyric acid-3-hydroxyhexanoic acid polymer (viscosity average molecular weight 250000, monomer content in the copolymer is 85% and 15% respectively) 40 Parts, 70 parts of inner layer polylactic acid (weight average molecular weight 150000), 15 parts of tributyl citrate; 9.6 parts of laurate, 0.5 part of succinic anhy...

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Abstract

The invention provides a completely degradable biobased heat shrink film. The heat shrink film is composed of an inner film and an outer film. The outer film is prepared from the following raw materials by weight: 0-70 parts of outer biobased copolyester, 30-100 parts of outer polylactic acid, 1-25 parts of an outer plasticizer, 0-3 parts of an outer lubricant, 0-2 parts of an outer nucleating agent, 0-5 parts of an outer chain extender, and 0.2-5 parts of an outer stabilizer. The inner film is prepared from the following raw materials by weight: 5-80 parts of inner biobased copolyester, 20-100 parts of inner polylactic acid, 1-30 parts of an inner plasticizer, 0-3 parts of an inner lubricant, 0-2 parts of an inner nucleating agent, 0-5 parts of an inner chain extender, and 0.2-11 parts of an inner stabilizer. The completely degradable biobased heat shrink film provided by the invention adopts completely degradable materials, and realizes production of multi-layer co-extruded heat shrink films.

Description

technical field [0001] The invention belongs to the field of bio-based heat-shrinkable films, in particular to a fully degradable bio-based heat-shrinkable film. Background technique [0002] Heat-shrinkable film has the characteristics of shrinking when heated, good flexibility, impact resistance, strong tear resistance, moisture resistance, and large shrinkage rate. At the same time, it can meet the function of transparent display of goods. It is widely used in product packaging, especially biaxial stretching Multi-layer co-extruded polyolefin shrink film has been rapidly popularized and used due to its excellent properties such as high gloss, high strength, and good cold resistance. [0003] At present, heat shrinkable films are mostly made of traditional petroleum-based materials, such as polyvinyl chloride (PVC), polyethylene (PE), polycondensation of terephthalic acid and ethylene glycol (PET), polystyrene (PS), etc. . As a kind of film material, heat shrinkable film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/20B32B27/36C08L67/04C08K13/02
CPCB32B27/08B32B27/20B32B27/36B32B2250/02B32B2250/244B32B2307/5825B32B2307/736C08J5/18C08J2367/04C08J2467/04C08L67/04C08L2203/16C08L2205/025C08K13/02
Inventor 张业刚侯哲胡文艳
Owner TIANJIN GREENBIO MATERIAL CO LTD
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