Green biodegradable plastic film and processing technology thereof

A technology of biodegradation and plastic film, applied in the field of plastic film, can solve the problems of difficult to ensure the fixed conditions of plastic film degradation, processing performance, mechanical properties and poor thermoplasticity, etc., to improve mechanical properties, excellent strength, and improve polymer properties Effect

Pending Publication Date: 2019-06-25
谷水英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The degradable plastic film produced by the prior art is an additive-type degradable plastic film, which has poor processing performance, mechanical properties and thermoplasticity, and biodegradation requires certain conditions and takes a long time. It is difficult to en

Method used

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  • Green biodegradable plastic film and processing technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The green biodegradable plastic film is made of the following raw materials in parts by weight: 60-70 parts of polyadipate / butylene terephthalate (PBAT), 20-30 parts of polylactic acid (PLA), modified starch 16-24 parts, 4-7 parts of reinforcing filler, 5-8 parts of glycerin, ethylene glycol, propylene glycol, stearic acid amide, methylene bis-stearamide, 2-3 parts of ethylene bis-stearamide, hindered amines 1-2 parts of light stabilizer;

[0051] Described green biodegradable plastic film is made by following steps:

[0052] Step S1, drying poly(butylene adipate / terephthalate), polylactic acid, modified starch and reinforcing filler in a vacuum oven at 60°C, 45°C, 40°C and 80°C for 6 hours, respectively;

[0053] Step S2, adding the dried polybutylene adipate / terephthalate, polylactic acid, modified starch and reinforcing filler into the twin-screw extruder at the same time, and then adding plasticizer, lubricant and light stabilizer, Melt blending, the blend is extr...

Embodiment 2

[0057] The green biodegradable plastic film is made of the following raw materials in parts by weight: 60-70 parts of polyadipate / butylene terephthalate (PBAT), 20-30 parts of polylactic acid (PLA), modified starch 16-24 parts, 4-7 parts of reinforcing filler, 5-8 parts of glycerin, ethylene glycol, propylene glycol, stearic acid amide, methylene bis-stearamide, 2-3 parts of ethylene bis-stearamide, hindered amines 1-2 parts of light stabilizer;

[0058] Described green biodegradable plastic film is made by following steps:

[0059] Step S1, drying poly(butylene adipate / terephthalate), polylactic acid, modified starch and reinforcing filler in a vacuum oven at 60°C, 45°C, 40°C and 80°C for 6 hours, respectively;

[0060] Step S2, adding the dried polybutylene adipate / terephthalate, polylactic acid, modified starch and reinforcing filler into the twin-screw extruder at the same time, and then adding plasticizer, lubricant and light stabilizer, Melt blending, the blend is extr...

Embodiment 3

[0064] A green biodegradable plastic film is made of the following raw materials in parts by weight: 70 parts of polyadipate / butylene terephthalate (PBAT), 30 parts of polylactic acid (PLA), 24 parts of modified starch, reinforced 7 parts of filler, 8 parts of propylene glycol, 3 parts of ethylene bisstearamide, 2 parts of hindered amine light stabilizer;

[0065] Described green biodegradable plastic film is made by following steps:

[0066] Step S1, drying poly(butylene adipate / terephthalate), polylactic acid, modified starch and reinforcing filler in a vacuum oven at 60°C, 45°C, 40°C and 80°C for 6 hours, respectively;

[0067] Step S2, adding the dried polybutylene adipate / terephthalate, polylactic acid, modified starch and reinforcing filler into the twin-screw extruder at the same time, and then adding plasticizer, lubricant and light stabilizer, Melt blending, the blend is extruded and granulated by a twin-screw extruder to obtain plastics;

[0068] Step S3, vacuumize...

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Abstract

The invention discloses a green biodegradable plastic film. The green biodegradable plastic film is prepared from, by weight, 60-70 parts of butylene polyadipate/terephthalate, 20-30 parts of polylactic acid, 16-24 parts of modified starch, 4-7 parts of a reinforcing filler, 5-8 parts of a plasticizer, 2-3 parts of a lubricant and 1-2 parts of a light stabilizer. The invention also discloses a processing technology of the green biodegradable plastic film. The butylene polyadipate/terephthalate and polylactic acid, adopted as the matrix in the invention, are completely biodegradable plastics, are green and environmentally friendly, and are mixed according to a certain ratio to form a film matrix, so the respective defects are compensated, and the mutual complementation of the mechanical performances and the barrier performance is achieved; addition of the proper amount of the modified starch can improve the mechanical properties of the film and obtain the completely degraded plastic ofPBAT; and the strength and the barrier property of the film can be improved under the assistance of a tiny amount of the reinforcing filler in order to obtain the green biodegradable plastic film withexcellent performances.

Description

technical field [0001] The invention belongs to the technical field of plastic films, and in particular relates to a green biodegradable plastic film and its processing technology. 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, so biodegradable plasti...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L3/02C08K13/06C08K9/04C08K3/34C08K3/26C08K5/053C08K5/20C08J5/18
Inventor 不公告发明人
Owner 谷水英
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