Anaerobic fermentation co-extrusion degradation bag and preparation method thereof

A technology of anaerobic fermentation and extrusion temperature, applied in the field of plastic bags, can solve the problems of non-degradable and slow degradation of plastic bags, and achieve the effect of low degradation threshold, good toughness and fast speed

Pending Publication Date: 2021-10-29
GUANGZHOU TONGYUAN PLASTIC PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing plastic bags degrade very slowly and canno

Method used

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  • Anaerobic fermentation co-extrusion degradation bag and preparation method thereof
  • Anaerobic fermentation co-extrusion degradation bag and preparation method thereof

Examples

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Effect test

example 1

[0021] First, the mass parts are: 100 parts of polybutylene adipate terephthalate, 40 parts of polylactic acid, and 60 parts of thermoplastic starch resin are added to a high-speed mixer and stirred at room temperature for 20 minutes. After mixing evenly, the material is discharged, and the mixture is added to In a twin-screw extruder, extrude and granulate at 140°C-180°C. Then, 100 parts of modified PVA were dried in a blast drying oven at 60° C. for 5 hours. Then the dried modified PVA is added to the middle layer extruder hopper of the three-layer co-extrusion blown film machine, and the mixture is respectively added to the outer layer and the inner layer extruder funnel of the three-layer co-extrusion blown film machine, and extruded at the same time, The extrusion temperature of the outer layer is 110°C-130°C, the middle layer is made of water-soluble degradation material, the extrusion temperature is 125°C-160°C, the inner layer extrusion temperature is 110°C-130°C, at 1...

example 2

[0023] First, the mass parts are: 110 parts of polybutylene adipate terephthalate, 50 parts of polylactic acid, and 40 parts of thermoplastic starch resin are added to a high-speed mixer and stirred at room temperature for 20 minutes. After mixing evenly, the material is discharged, and the mixture is added to In a twin-screw extruder, extrude and granulate at 140°C-180°C. Then, 100 parts of modified PVA were dried in a blast drying oven at 60° C. for 5 hours. Then the dried modified PVA is added to the middle layer extruder hopper of the three-layer co-extrusion blown film machine, and the mixture is respectively added to the outer layer and the inner layer extruder funnel of the three-layer co-extrusion blown film machine, and extruded at the same time, The extrusion temperature of the outer layer is 110°C-130°C, the middle layer is made of water-soluble degradation material, the extrusion temperature is 125°C-160°C, the inner layer extrusion temperature is 110°C-130°C, at 1...

example 3

[0025] First, the mass parts are: 120 parts of polybutylene adipate terephthalate, 60 parts of polylactic acid, and 20 parts of thermoplastic starch resin are added to a high-speed mixer and stirred at room temperature for 20 minutes. After mixing evenly, the material is discharged, and the mixture is added to In a twin-screw extruder, extrude and granulate at 140°C-180°C. Then, 100 parts of modified PVA were dried in a blast drying oven at 60° C. for 5 hours. Then the dried modified PVA is added to the middle layer extruder hopper of the three-layer co-extrusion blown film machine, and the mixture is respectively added to the outer layer and the inner layer extruder funnel of the three-layer co-extrusion blown film machine, and extruded at the same time, The extrusion temperature of the outer layer is 110°C-130°C, the middle layer is made of water-soluble degradation material, the extrusion temperature is 125°C-160°C, the inner layer extrusion temperature is 110°C-130°C, at 1...

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Abstract

The invention discloses an anaerobic fermentation co-extrusion degradation bag and a preparation method thereof, the degradation bag comprises an outer layer, a middle layer and an inner layer, the outer layer and the inner layer are prepared by mixing three raw materials of poly (p-butyl adipate) (PBAT), polylactic acid (PLA) and thermoplastic starch resin, the middle layer is prepared from a modified PVA raw material, and the inner layer is prepared from a modified PVA raw material. The outer layer and the inner layer are prepared from the following raw materials in parts by mass: 50 to 60 parts of poly (butylene adipate-co-terephthalate), 20 to 30 parts of polylactic acid and 10 to 30 parts of thermoplastic starch resin. The inner layer and the outer layer are decomposed under the environment of light, heat, microorganisms and the like, when the outer layer is damaged, if the middle layer meets water molecules, the middle layer can be dissolved by water, the degradation rate is increased, fermentative degradation can be carried out within a week, biogas is generated, and the method is friendly to nature and microorganisms. According to the method, water in the natural world is used as a carrier for degradation, the degradation threshold is lower, the speed is higher, environmental protection and saving are achieved, and meanwhile the degradation bag has good toughness and heat sealability.

Description

technical field [0001] The invention relates to the technical field of plastic bags, in particular to an anaerobic fermentation co-extruded degradation bag and a preparation method thereof. Background technique [0002] Plastic bags are widely used in supermarkets and markets, bringing convenience to people's lives. However, plastic bags are buried in the ground as garbage after they are discarded. The natural degradation time of plastic bags takes a hundred years to complete. Existing plastic bags degrade very slowly and cannot be degraded in the natural environment for a long time. Contents of the invention [0003] In order to achieve the above object, the present invention adopts the following technical solutions: 1. a kind of anaerobic fermentation co-extrusion degradation bag, it is characterized in that: comprise outer layer, middle layer and inner layer, wherein outer layer and inner layer are all made of polyadipate It is prepared by mixing three raw materials: b...

Claims

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Application Information

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IPC IPC(8): B32B27/30B32B27/36B32B27/08C08L67/02C08L67/04C08L3/02C08J5/18B29C48/92B29C49/04
CPCB32B27/30B32B27/36B32B27/08C08J5/18B29C48/0017B29C48/92B29C49/04C08J2367/02C08J2467/04C08J2403/02B29C2948/92704
Inventor 叶芃陈英杰
Owner GUANGZHOU TONGYUAN PLASTIC PROD CO LTD
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