Degradable plastic film and preparation method thereof

A technology for plastic films and raw materials, applied in the field of degradable films, can solve the problems of low recycling efficiency and cannot be completely removed, and achieve the effects of improving strength, improving biodegradability, and reducing difficulty and time.

Inactive Publication Date: 2018-10-02
杨建军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a kind of degradable plastic film and preparation method thereof, to solve the problem of low recovery efficiency and inability to completely remove Na in the prior art. 2 SO 4 And other issues

Method used

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  • Degradable plastic film and preparation method thereof

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Effect test

Embodiment

[0023] A kind of degradable plastic film is provided in the present embodiment, the raw material of this degradable plastic film is constituted as follows according to mass fraction: thermoplastic polyurethane resin 47-62 parts, modified polylactic acid resin 10-25 parts, polyvinyl alcohol 7-15 parts 7-10 parts of plasticizer, 5-8 parts of inorganic filler, 5-8 parts of maltodextrin, 2-5 parts of chitosan oligosaccharide, and 2-5 parts of lignocellulose.

[0024] Among them: thermoplastic polyurethane resin is polyethylene adipate glycol ester TPU, polyethylene glycol propylene glycol adipate TPU, polyethylene adipate butylene glycol ester TPU, polyadipate Ethylene glycol diethylene glycol ester type TPU, polyethylene adipate neopentyl glycol ester type TPU, polyethylene succinate neopentyl glycol ester type TPU, polyethylene succinate propylene glycol ester type TPU, polyethylene succinate butylene glycol ester type TPU, polyethylene succinate diethylene glycol ester type TPU...

specific Embodiment 1

[0032] The present embodiment provides a kind of degradable plastic film, becomes by weight parts:

[0033] 62 parts of thermoplastic polyurethane resins, selected in the present embodiment is polyethylene adipate glycol ester type TPU;

[0034] 10 parts of modified polylactic acid resin;

[0035] 7 parts of polyvinyl alcohol, polyvinyl alcohol in the present embodiment is brand PVA124, degree of polymerization is 24,000-25,000, molecular weight is 105000, degree of alcoholysis is 99%, viscosity (4%, 20 ℃) ​​is 55-67mPa.s ;

[0036] 7 parts of plasticizer, in the present embodiment plasticizer is citric acid ester (WT-1);

[0037] 5 parts of inorganic fillers, in the present embodiment, the inorganic fillers are anatase titanium dioxide;

[0038] 5 parts of maltodextrin. In this example, maltodextrin is made from cornstarch, which is hydrolyzed and converted through enzymatic process control;

[0039] 2 parts of chitosan oligosaccharide, chitosan oligosaccharide is added a...

specific Embodiment 2

[0043] A kind of degradable plastic film, becomes by weight parts:

[0044] 47 parts of thermoplastic polyurethane resins, selected in the present embodiment is polyethylene adipate glycol neopentyl glycol ester type TPU;

[0045] 25 parts of modified polylactic acid resins;

[0046] 7 parts of polyvinyl alcohol, polyvinyl alcohol in the present embodiment is brand PVA124, degree of polymerization is 24,000-25,000, molecular weight is 105000, degree of alcoholysis is 99%, viscosity (4%, 20 ℃) ​​is 55-67mPa.s ;

[0047] 7 parts of plasticizer, in the present embodiment, plasticizer is epoxy soybean oil;

[0048] 5 parts of inorganic fillers, in the present embodiment, inorganic fillers are nano active calcium carbonate;

[0049] 5 parts of maltodextrin. In this example, maltodextrin is made from wheat starch, which is hydrolyzed and converted through enzymatic process control;

[0050] 2 parts of chitosan oligosaccharide, in this embodiment, chitosan oligosaccharide is spec...

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Abstract

The invention discloses a degradable plastic film and a preparation method thereof. The degradable plastic film is prepared from the following raw materials: 47-62 parts of thermoplastic polyurethaneresin, 10-25 parts of modified polylactic resin, 7-15 parts of polyvinyl alcohol, 7-10 parts of a plasticizer, 5-8 parts of inorganic filler, 5-8 parts of maltodextrin, 2-5 parts of chitosan oligosaccharide and 2-5 parts of lignocelluloses. The preparation method includes: adding the raw materials into a high-speed mixer for uniform mixing, then performing extrusion and granulation by a single screw extruder, and then conducting blowing molding or tape casting, thus obtaining the degradable plastic film. The degradable plastic film obtained by the invention is completely biodegradable and pollution-free, can achieve a degradation rate of 98% within 3-4 months, has the characteristics of excellent toughness, wear resistance, mechanical properties and thermoplastic processing properties, safety and environmental protection.

Description

technical field [0001] The invention relates to a film, especially a degradable film. Background technique [0002] With the rapid development of the plastic industry, while plastics bring convenience to people's lives, they also bring environmental problems. In order to put an end to the pollution of plastics, promoting the development of the plastics industry in terms of greening, reduction, and recyclability has become an urgent problem to be solved by the whole society. Degradable plastics are currently one of the main ways for the plastics industry to solve environmental pollution. Such materials can be used for daily necessities and industrial purposes, mainly including express bags, packaging films, agricultural films, disposable plastic bags and disposable plastic tableware. Not only does the performance meet the requirements of use, but also the performance remains unchanged during the shelf life, and it can be completely degraded into environmentally harmless subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L67/04C08L29/04C08L3/02C08L5/08C08L1/02C08L91/00C08K13/02C08K5/11C08K3/22C08K3/26C08K5/053C08J5/18
CPCC08J5/18C08J2375/06C08J2401/02C08J2403/02C08J2405/08C08J2429/04C08J2467/04C08J2491/00C08K5/053C08K5/11C08K13/02C08K2003/2241C08K2003/265C08K2201/011
Inventor 杨建军张建安何祥燕吴庆云吴明元刘久逸
Owner 杨建军
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