Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of PLA fully degradable plastic and production method thereof

A production method and a fully degradable technology, applied in the field of plastics, can solve problems such as low output and high energy consumption, and achieve the effects of good quality plastics, reduced mass use, and excellent performance

Inactive Publication Date: 2017-01-18
FUYANG SHANGNUO IND DESIGN CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is energy-intensive and yields low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of PLA fully degradable plastic and production method thereof
  • A kind of PLA fully degradable plastic and production method thereof
  • A kind of PLA fully degradable plastic and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A fully degradable PLA plastic, composed of the following raw materials in mass percentage: straw starch 5.5%, lactic acid 2.3%, polyvinyl chloride 0.5%, PVA 15%, citrate 0.3%, polyether 0.2%, silicon-calcium-carbon composite deoxidation Agent 0.05%, organic pigment 0.03%, water balance.

Embodiment 2

[0030] A fully degradable PLA plastic, composed of the following raw materials in mass percentage: straw starch 6.1%, lactic acid 2.6%, polyvinyl chloride 0.7%, PVA 13%, citrate 0.5%, polyether 0.25%, silicon-calcium-carbon composite deoxidation Agent 0.75%, organic pigment 0.05%, water balance.

Embodiment 3

[0032] A fully degradable PLA plastic, composed of the following raw materials in mass percentage: straw starch 6.7%, lactic acid 3.0%, polyvinyl chloride 1.0%, PVA 10%, citrate 0.7%, polyether 0.3%, silicon-calcium-carbon composite deoxidizer 0.1%, organic pigment 0.07%, water balance.

[0033] Such as image 3 Shown is the flow chart of the production method of PLA fully degradable plastics in the embodiments of the present invention, and the specific steps are as follows:

[0034] (1) Hydrolyze straw starch into glucose with amylase in proportion, and ferment glucose with Lactobacillus, add NaOH solution to generate lactic acid at the same time, esterify and dehydrate to generate L-lactic acid mixture with a concentration of more than 90%, at a high temperature of 300°C Crack to generate lactide, add PVA and polyvinyl chloride, and concentrate in a vacuum device to become polylactic acid;

[0035] (2) Put the polylactic acid into the spiral high-speed mixer, add plasticiz...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses plastic allowing PLA to be fully degraded and a production method thereof. The plastic is composed of straw starch, lactic acid, polyvinyl chloride, PVA, plasticizers, lubricant, deoxidizing agents, organic pigment and water according to the mass ratio; the straw starch is hydrolyzed into glucose by using amylase, after the glucose is fermented, a NaOH solution is added, the glucose and the NaOH solution react to generate lactic acid, the lactic acid is esterified and hydrolyzed to generate an L-lactic acid mixture, the L-lactic acid mixture is pyrolyzed at high temperature to generate lactide, the PVA and the polyvinyl chloride are added, and the mixture is concentrated into polylactic acid in a vacuum device; the polylactic acid is placed into a spiral high-speed mixer, the plasticizers, the deoxidizing agents, the lubricant and the organic pigment are added, the mixture is mixed, stirred and then placed into a double-screw-rod extruding machine to be mixed together and pelletized, and drying is carried out to obtain the plastic. According to the method, the quantity of the adopted additives is reduced greatly, expense for using the additives is saved correspondingly, cost is saved, and the produced plastic is good in quality and excellent in performance.

Description

technical field [0001] The invention relates to the field of plastics, in particular to a fully degradable PLA plastic and a production method thereof. Background technique [0002] At present, PLA degradable plastics (biodegradable plastic polylactic acid) have been practically produced and used in industry. With the rapid development of economy, my country's demand for PLA degradable plastics is increasing. At present, there are mainly the following production methods for PVA degradable plastics: [0003] (1) Lactic acid direct polymerization method [0004] The direct polymerization method has been studied as early as the 1930s and 1940s, but because key technologies such as water removal in the reaction have not been well resolved, the molecular weight of its products is low (all below 4000), The strength is extremely low, easy to decompose, and has no practicality. [0005] (2) Ring-opening polymerization method [0006] The ring-opening polymerization method is cur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L29/04C08L27/06
Inventor 贾尚
Owner FUYANG SHANGNUO IND DESIGN CO LTD