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Completely biodegradable heat shrink film material, completely biodegradable heat shrink film and preparation method

A heat-shrinkable film and biodegradable technology, applied in the field of heat-shrinkable film materials, can solve the problems of polluted environment and difficult degradation of heat-shrinkable film

Pending Publication Date: 2022-04-01
山东哈工生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first technical problem to be solved by the present invention is to provide a completely biodegradable heat-shrinkable film material, which solves the problem that heat-shrinkable film is difficult to degrade and pollutes the environment in the past.

Method used

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  • Completely biodegradable heat shrink film material, completely biodegradable heat shrink film and preparation method

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preparation example Construction

[0032] A preparation method of a fully biodegradable heat-shrinkable film:

[0033] (1) Raw material modification: mix corn pollen polysaccharide, enteromorpha powder, starch, and plasticizer for modification, and the raw material modification temperature is 80-100°C to obtain a modified mixture;

[0034] (2) Mixing: In the modified mixture obtained in step 1), add polylactic acid, polybutylene terephthalate, antioxidant, chain extender, anti-blocking agent, mix uniformly, and the mixing temperature 80-100°C to obtain a blended mixture;

[0035] (3) Granulation and film blowing: the mixed mixture prepared in step 2) is extruded and granulated by a twin-screw granulator, and blown by a film blowing machine. A transparent fully biodegradable heat shrinkable film is obtained.

[0036] Among them, the enteromorpha powder is obtained by drying and crushing the fresh enteromorpha. After the fresh enteromorpha is washed, the water content is 90%-95%, and it is centrifugally dehydra...

Embodiment 1

[0039] Weigh 1 part of corn pollen polysaccharide, 5 parts of Enteromorpha powder, 17 parts of starch, 0.5 part of water, 4.5 parts of glycerin, 1 part of citric acid and mix and modify at 80 ° C; add 10 parts of polylactic acid, polyethylene terephthalate 58.7 parts of butylene diacid, 0.1 part of antioxidant 1010, 0.4 part of antioxidant 168, 0.5 part of BASF ADR4468, 0.3 part of erucamide, mixed evenly, put into twin-screw granulator, granulation temperature 150 ℃, blown film The temperature is 150°C to produce a fully biodegradable heat-shrinkable film.

Embodiment 2

[0041] Weigh 3 parts of corn pollen polysaccharide, 4 parts of Enteromorpha powder, 15 parts of starch, 1 part of polyethylene glycol, 2 parts of acetyl tributyl citrate, and 5 parts of glycerin and mix and modify at 90 ° C; add 5 parts of polylactic acid , 63.1 parts of polybutylene terephthalate, 0.2 parts of 10100.2 parts, 0.2 parts of 168, 1 part of BASF ADR4468, 0.2 parts of erucamide, and 0.4 parts of stearic acid amide were mixed evenly, and put into a twin-screw granulator to make The particle temperature is 140°C, and the film blowing temperature is 140°C, to produce a fully biodegradable heat shrinkable film.

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Abstract

The invention discloses a completely biodegradable heat shrink film material, a completely biodegradable heat shrink film and a preparation method, the completely biodegradable heat shrink film material comprises the following components in parts by mass: 1-3 parts of corn pollen polysaccharide, 3-5 parts of enteromorpha powder, 15-20 parts of starch, 3-15 parts of polylactic acid, and 50-70 parts of polybutylene terephthalate. The transparent full-biodegradable heat shrinkage film is obtained through raw material modification, material mixing, granulation and film blowing, the full-biodegradable heat shrinkage film can be completely biodegraded and is excellent in performance, the light transmittance is larger than 95%, the relative biological decomposition rate is larger than 90%, and the shelf life is two years.

Description

technical field [0001] The invention relates to a fully biodegradable heat-shrinkable film material, a fully biodegradable heat-shrinkable film and a preparation method. Background technique [0002] At present, heat shrinkable film is mostly used for heat shrinkable label film, and the total market consumption is about 280,000 tons per year. The main types are polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), modified poly Ethylene phthalate (PET), oriented polystyrene (PS), these traditional materials are difficult to degrade in the natural environment, and a large amount of harmful gases will be produced during the incineration process, polluting the environment. In recent years, plastic waste has become an important cause of environmental pollution. More than 67 countries and regions including China, the United States, Japan, Germany, France, and South Korea have successively introduced policies related to plastic restrictions or even banning plastic produ...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L3/02C08L67/04C08L5/00C08K5/134C08K5/526C08K5/20C08K5/053C08J5/18
Inventor 卢卫红金少瑾周凯张振博张友源徐翠翠
Owner 山东哈工生物科技有限公司
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