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A kind of environment-friendly heat-insulating plastic film and its preparation process

A technology of plastic film and preparation process, which is applied in the field of plastic film, can solve the problems that fully biodegradable plastic film can only be used in low temperature places, and the performance can not meet the requirements widely, low temperature, only 35-40 ℃, etc., to achieve good Enhanced toughness, compactness, and reduced polarity

Active Publication Date: 2021-01-26
东莞市华达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Many existing biodegradable plastic films cannot widely meet the requirements in terms of performance. For example, Chinese patent CN101235156 discloses a fully biodegradable plastic film based on polylactic acid and its preparation method.
However, due to the low glass transition temperature of polylactic acid and its brittleness at room temperature, the product has poor toughness and low tear strength, and the use temperature of the product is also greatly restricted.
Another example is CN200810051415.6, which discloses a fully biodegradable plastic film based on polypropylene carbonate and its preparation method. The flexibility and tear strength of polypropylene carbonate are high, but the glass transition temperature is higher than that of polylactic acid. It is still low, only 35-40°C, and the prepared fully biodegradable plastic film can only be used in low temperature places

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] An environmentally friendly heat-insulating plastic film, made of the following raw materials in parts by weight: 30 parts of polylactic acid (PLA), 20 parts of polybutylene terephthalate adipate (PBAT), 4 parts of glycerin, modified 8 parts of plant fiber, 1 part of antibacterial agent, 60 parts of chloroform;

[0058] The environmentally friendly heat-insulating plastic film is processed by the following steps:

[0059] Step S1, first dry polylactic acid and polybutylene terephthalate adipate in a vacuum oven at 60°C for 8 hours (in order to avoid hydrolytic degradation), place them in a twin-screw extruder after drying, add glycerin, Use a twin-screw extruder (length-to-diameter ratio is 32:1, screw diameter is 20mm, rotation speed is 100rpm) to extrude and granulate, extrude at 190°C, and the feed rate is 100g / min;

[0060] Step S2, put the plastic base particles obtained above into a vacuum oven at 70°C for 6 hours, add 2 / 3 of chloroform, and magnetically stir at ...

Embodiment 2

[0065] An environmentally friendly heat-insulating plastic film, made of the following raw materials in parts by weight: 35 parts of polylactic acid (PLA), 25 parts of polybutylene terephthalate adipate (PBAT), 5 parts of glycerin, modified 10 parts of plant fiber, 1.5 parts of antibacterial agent, 70 parts of chloroform;

[0066] The environmentally friendly heat-insulating plastic film is processed by the following steps:

[0067] Step S1, first dry polylactic acid and polybutylene terephthalate adipate in a vacuum oven at 60°C for 8 hours (in order to avoid hydrolytic degradation), place them in a twin-screw extruder after drying, add glycerin, Use a twin-screw extruder (length-to-diameter ratio is 32:1, screw diameter is 20mm, rotation speed is 100rpm) to extrude and granulate, extrude at 190°C, and the feed rate is 100g / min;

[0068] Step S2, putting the plastic base particles obtained above into a vacuum oven at 70°C for 6.5 hours to dry, adding 2 / 3 of chloroform, stirr...

Embodiment 3

[0073] An environmentally friendly heat-insulating plastic film, made of the following raw materials in parts by weight: 40 parts of polylactic acid (PLA), 30 parts of polybutylene terephthalate adipate (PBAT), 6 parts of glycerin, modified 8-12 parts of plant fiber, 2 parts of antibacterial agent, 80 parts of chloroform;

[0074] The environmentally friendly heat-insulating plastic film is processed by the following steps:

[0075] Step S1, first dry polylactic acid and polybutylene terephthalate adipate in a vacuum oven at 60°C for 8 hours (in order to avoid hydrolytic degradation), place them in a twin-screw extruder after drying, add glycerin, Use a twin-screw extruder (length-to-diameter ratio is 32:1, screw diameter is 20mm, rotation speed is 100rpm) to extrude and granulate, extrude at 190°C, and the feed rate is 100g / min;

[0076] Step S2, put the plastic base particles obtained above into a vacuum oven at 70°C for 7 hours, add 2 / 3 of chloroform, and magnetically stir...

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Abstract

The invention discloses an environment-friendly thermal-insulation plastic film. The plastic film is prepared from the following raw materials in parts by weight: 30-40 parts of polylactic acid, 20-30parts of polybutylene adipate terephthalate, 4-6 parts of glycerol, 8-12 parts of modified plant fibers, 1-2 parts of an antibacterial agent and 60-80 parts of trichloromethane. The invention furtherdiscloses a preparation process of the environment-friendly thermal-insulation plastic film. According to the invention, the polylactic acid and the polybutylene adipate terephthalate are adopted asa plastic film base body, both the polylactic acid and the polybutylene adipate terephthalate are biodegradable high polymers, and the polybutylene adipate terephthalate can effectively toughen the polylactic acid, so that the defect that polylactic acid is brittle is overcome; through enhancement by the modified plant fibers, the bending modulus of the polylactic acid (PLA) material is greatly improved, and the mechanical property of the composite material is enhanced; through the addition of the trace antibacterial agent, the film has antibacterial performance; and the thermal-insulation plastic film which is green and biodegradable, and has an excellent mechanical property and an antibacterial property is obtained by processing.

Description

technical field [0001] The invention belongs to the technical field of plastic films, and in particular relates to an environment-friendly heat-insulating plastic film and a preparation process thereof. Background technique [0002] Today, with the continuous development of science and technology, plastic film products have become a common and indispensable thing in people's lives. Plastic films such as disposable plastic bags and express packaging bags can be seen everywhere. The raw materials of traditional plastic film products are mostly various derivatives of petroleum. As we all know, petroleum is a non-renewable resource. Therefore, it is urgent to find suitable or even better plastic substitutes before petroleum resources are exhausted. On the other hand, with the enhancement of people's awareness of environmental protection, the era of purely pursuing product performance has passed, and now people need the environmental friendliness of plastic products themselves, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08L97/02C08K13/02C08K3/22C08K5/1545C08K5/053C08J5/18
CPCC08J5/18C08J2367/04C08J2467/02C08J2497/02C08K5/053C08K5/1545C08K13/02C08K2003/2241C08K2201/011
Inventor 罗志诚
Owner 东莞市华达新材料有限公司