Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Water-soluble biodegradable material, and its preparing method and sheet-like shaped product

A biodegradable material and biodegradable technology are applied in the fields of water-soluble biodegradable materials and their preparation and sheet-like molded products, and can solve the problems of poor flow performance, poor plasticity, and inability to be used for sheet-like molded products, etc. achieve good plasticity

Inactive Publication Date: 2007-03-28
BEIJING HONGHUA BIOMATERIAL
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of poor fluidity and plasticity of water-soluble biodegradable materials in the prior art, and cannot be used for sheet shaped products, and provide a kind of water-soluble biodegradable material with good fluidity, good plasticity, and can be used for sheet materials. Water-soluble biodegradable material for shaped articles, method for producing the same, and sheet-like shaped articles containing the material of the present invention

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the water-containing polyvinyl alcohol of the present invention comprises: contacting water and polyvinyl alcohol under stirring conditions, mixing uniformly, and swelling to obtain the water-containing polyvinyl alcohol. The purpose of fully contacting water and polyvinyl alcohol is to expand the intricately intertwined polyvinyl alcohol molecular chains to the greatest extent through water, thereby achieving the purpose of reducing the melting temperature of polyvinyl alcohol. In order to fully swell the polyvinyl alcohol, the weight ratio of polyvinyl alcohol to water is 0.5-5, preferably 1-4. When the feed weight ratio of polyvinyl alcohol and water was far less than 0.5, polyvinyl alcohol was dissolved in water to form a solution state rather than the swelling state required by the present invention; when the feed weight ratio of polyvinyl alcohol and water was far greater than 5, The polyvinyl alcohol cannot all be swollen sufficiently. ...

Embodiment 1

[0038] This example is used to illustrate the preparation of the water-soluble biodegradable material of the present invention.

[0039] (1) 20 parts by weight of pure water was added to 40 parts by weight of polyvinyl alcohol with a degree of alcoholysis of 86% and a median degree of polymerization of 1950 under a stirring condition of 500 rev / min and stirred for 7 minutes to obtain water-containing polyethylene Alcohol, wherein the weight ratio of polyvinyl alcohol to water is 2.85:1. Add 5.0 parts by weight of sorbitol, 5.0 parts by weight of glycerin and 5.0 parts by weight of pentaerythritol into 15.0 parts by weight of the above-mentioned water-containing polyvinyl alcohol, stir and mix evenly at a speed of 50 rpm and place it at room temperature After 24 hours, 70.0 parts by weight (dry basis weight) of ordinary cornstarch with a number average molecular weight of 150,000 were added to the mixture and stirred evenly. The mixer was first mixed at a low speed of 100 rpm f...

Embodiment 2

[0042] This example is used to illustrate the preparation of the water-soluble biodegradable material of the present invention.

[0043] (1) Add 35 parts by weight of pure water to 35 parts by weight of polyvinyl alcohol with a degree of alcoholysis of 88% and a median degree of polymerization of 2050 under stirring conditions at 550 rpm and stir for 3 minutes to obtain water-containing polyvinyl alcohol , wherein the weight ratio of polyvinyl alcohol to water is 1.25:1. Then 5.0 parts by weight of sorbitol and 5.0 parts by weight of glycerin are added to 22.0 parts by weight of the water-containing polyvinyl alcohol obtained above, and after stirring and mixing at a speed of 80 rpm, 60.0 parts by weight (dry basis weight) ) the common wheat starch that the number average molecular weight is 150,000 joins in the above-mentioned mixture and stirs, and then the carboxymethyl cellulose of 3.0 weight parts, the zinc stearate of 2.0 weight parts, the calcium stearate of 2.0 weight ...

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 relates to water solubility biodegradable material. The material contains the outcome formed by mixture fusing which contains starch, polyhydric alcohol, and aqueous polyvinyl alcohol which has hydrophilicity. Using the mixture total weight as the criterion, the content of the polyhydric alcohol is between 10wt% and 19wt%. Its fusing temperature is 140-190 degree centigrade; decomposition temperature is 250-400 degree centigrade. Thus it can be used to make sheet material series forming product which has better simply supported beam impact strength, yield strength in tension, water solubility and biodegradability.

Description

technical field [0001] The invention relates to a water-soluble biodegradable material, a preparation method thereof, and a sheet shaped product containing the material. Background technique [0002] CN1405230A discloses a water-soluble, pollution-free plastic molding material that can be completely hydrolyzed and biodegradable in a short period of time. The material contains polyvinyl alcohol, glycerol, diethylene glycol, sorbitol, fiber, Silica, superfine calcium, modified starch. CN1405230A also discloses the preparation method of the material: add 1-30 parts of glycerol to the polyvinyl alcohol raw material, stir at high temperature, make it fully wet, and then add an appropriate amount of auxiliary plasticizer, crosslinking agent, Reinforcing agents, modifiers, fillers, etc.; then, blending and reacting at a temperature range of 25-65°C for 5-50 minutes, and then adding the obtained materials to a single-screw or twin-screw extruder for granulation, and Film blowing a...

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
IPC IPC(8): C08L3/02C08L29/04C08K5/11B29B9/12B29C47/40B29D7/01B29C48/40
CPCC08L2201/06C08L3/02C08L29/04C08K5/053C08L101/16B29B7/46B29C48/40B29B7/007B29B7/86B29B9/06B29B9/12C08L2666/04C08L2666/26
Inventor 李小鲁
Owner BEIJING HONGHUA BIOMATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com