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Biodegradable plastic film and preparation method thereof

A plastic film and biological technology, applied in the field of biodegradable plastic film and its preparation, to achieve the effects of cost reduction, excellent performance, easy application and production

Pending Publication Date: 2021-12-07
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of biodegradable plastic film and preparation method thereof, aim to solve the problem that PBAT and PLA are fully compatible in the prior art, by adding cross-linking agent dicumyl peroxide and compatibilizer PLA -g-MAH to improve the performance of blended materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A biodegradable plastic film, comprising the following components in parts by weight: 220 parts of modified starch, 60 parts of polylactic acid, 600 parts of polybutylene adipate terephthalate, 20 parts of compatibilizer, 4 parts of antioxidant, 6 parts of lubricant, 20 parts of monoglyceride fatty acid ester, 2 parts of dicumyl peroxide.

[0017] The present invention also proposes a method for preparing a biodegradable plastic film, the main steps of which are:

[0018] (1) Add 60g polylactic acid, 600g polybutylene adipate terephthalate, 20g compatibilizer, 6g lubricant, 2g dicumyl peroxide into parallel twin-screw extruder, melt blend Extrusion granulation to prepare chemically cross-linked modified PBAT / PLA masterbatch, the temperature of each zone of the extruder is 170 ° C, 172 ° C, 175 ° C, 175 ° C, 172 ° C, 172 ° C, 171 ° C, the head temperature 170°C;

[0019] (2) Pre-blend corn starch and starch plasticizer, then put it aside for a period of time and add it...

Embodiment 2

[0024] A biodegradable plastic film, comprising the following components in parts by weight: 300 parts of modified starch, 100 parts of polylactic acid, 600 parts of polybutylene adipate terephthalate, 20 parts of compatibilizer, 4 parts of antioxidant, 6 parts of lubricant, 20 parts of monoglyceride fatty acid ester, 2 parts of dicumyl peroxide.

[0025] The present invention also proposes a method for preparing a biodegradable plastic film, the main steps of which are:

[0026] (1) Add 100g polylactic acid, 600g polybutylene adipate terephthalate, 20g compatibilizer, 6g lubricant, 2g dicumyl peroxide into parallel twin-screw extruder, melt blend Extrusion granulation to prepare chemically cross-linked modified PBAT / PLA masterbatch, the temperature of each zone of the extruder is 170 ° C, 172 ° C, 175 ° C, 175 ° C, 172 ° C, 172 ° C, 171 ° C, the head temperature 170°C;

[0027] (2) Pre-blend corn starch and starch plasticizer, then put it aside for a period of time and add ...

Embodiment 3

[0032] A biodegradable plastic film, comprising the following components in parts by weight: 350 parts of modified starch, 300 parts of polylactic acid, 600 parts of polybutylene adipate terephthalate, 20 parts of compatibilizer, 4 parts of antioxidant, 6 parts of lubricant, 20 parts of monoglyceride fatty acid ester, 2 parts of dicumyl peroxide.

[0033] The present invention also proposes a method for preparing a biodegradable plastic film, the main steps of which are:

[0034] (1) Add 300g polylactic acid, 600g polybutylene adipate terephthalate, 20g compatibilizer, 6g lubricant, 2g dicumyl peroxide into parallel twin-screw extruder, melt blend Extrusion granulation to prepare chemically cross-linked modified PBAT / PLA masterbatch, the temperature of each zone of the extruder is 170 ° C, 172 ° C, 175 ° C, 175 ° C, 172 ° C, 172 ° C, 171 ° C, the head temperature 170°C;

[0035] (2) Pre-blend corn starch and starch plasticizer, then put it aside for a period of time and add ...

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PUM

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Abstract

The invention is suitable for the field of fully biodegradable plastics, and provides a biodegradable plastic film and a preparation method thereof. The biodegradable plastic film is prepared from the following components in parts by weight: 150 to 300 parts of modified starch, 50 to 300 parts of polylactic acid, 500 to 800 parts of poly (butylene adipate-co-terephthalate), 10 to 40 parts of compatilizer, 2 to 5 parts of antioxidant, 5 to 20 parts of lubricant, 10 to 40 parts of fatty acid monoglyceride and 1 to 4 parts of dicumyl peroxide. According to the method, DCP chemical crosslinking is adopted, the mechanical performance of the thin film material is improved, operation is easy, and cost is saved.

Description

technical field [0001] The invention relates to the technical field of thermoplastic biodegradable plastics, in particular to a biodegradable plastic film and a preparation method thereof. Background technique [0002] In recent years, petroleum-based plastics have been widely used in various fields. While polyethylene, polypropylene, polyamide and other polymer materials permeate daily life, the waste generated by them also brings serious environmental problems. In particular, a large number of discarded plastic products such as mulch film in agricultural production seriously damage the soil structure, endanger the growth of crops, and affect the balance of the soil micro-ecological system. With the improvement of people's awareness of environmental protection, biodegradable polymer materials have attracted widespread attention. Biodegradable plastic refers to a type of plastic that is degraded by the action of microorganisms such as bacteria, fungi and algae that exist in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L3/02C08K5/103C08K5/14C08J5/18
CPCC08J5/18C08J2367/02C08J2467/04C08J2403/02C08K5/103C08K5/14
Inventor 宋伟强刘箫华孙东泽
Owner HENAN UNIVERSITY OF TECHNOLOGY
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