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

Polyvinyl alcohol film and preparation method thereof

A polyvinyl alcohol film and polyvinyl alcohol resin technology, applied in the field of materials, can solve the problems of lack of research results with independent intellectual property rights, manufacturing costs, unsuitable product prices, weak research strength, etc., and achieve good gloss and transparency, Excellent mechanical properties, reduced equipment costs and energy consumption

Active Publication Date: 2009-11-18
无锡高拓新材料股份有限公司
View PDF0 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, our country started late and the research force is weak. So far, only a few research units and enterprises have some small-scale production after tracking foreign technology, and there is no research result with independent intellectual property rights.
Moreover, the manufacturing cost and product price cannot adapt to the national conditions of our country.

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
  • Polyvinyl alcohol film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 180g of latent solvent DMF (Shanghai Reagent Factory), 60g of polyvinyl alcohol resin PVA17-88 (Sichuan Vinylon Factory), 4g of glycerin, 0.1g of n-butanol and 1g of borax into a 500mL three-necked flask, stirring at 800 rpm Then, gradually heat the temperature up, and use the back distillation method to dissolve the PVA resin at a high temperature of 130-140°C for 2 hours to make a completely dissolved high-concentration PVA solution. Stop stirring, maintain a temperature of about 130°C, and let the PVA solution stand to naturally remove bubbles in the solution for 1 to 1.5 hours. Then, at this temperature, the PVA solution with all bubbles removed is added to a Pingfeng casting mold preheated to a temperature of 100~110℃, and it is poured onto a mirror steel plate at a temperature of 10~20℃. It quickly becomes condensed after being quenched. Glue film. Then peel off the gel film from the steel plate, fix it with a metal frame, and put it in an oven at a temperature of...

Embodiment 2

[0027] The method is the same as in Example 1, except that the latent solvent is NMP (Shanghai Reagent Factory), the plasticizer is dioctyl phthalate, the defoamer is n-octanol, the gel enhancer is boric acid, and the dissolution temperature is It is 145~150℃.

Embodiment 3

[0029] The method is the same as in Example 1, except that the latent solvent is DMAC (Shanghai Reagent Factory), and the dissolution temperature is 135-145°C.

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 a polyvinyl alcohol film, which comprises the following compositions by weight portion: 10 to 50 portions of polyvinyl alcohol resin, 0.5 to 2 portions of plasticizer, 0.01 to 0.05 portion of defoaming agent, and 0.05 to 0.5 portion of gel intensifier. The invention also discloses a method for preparing the polyvinyl alcohol film, which comprises the following steps: preparing PVA solution by taking the polyvinyl alcohol resin, cosolvent and the plasticizer as main compositions; preparing the solution into a gel film to ensure that the gel film has a stable structure and strong self-maintenance capability before solvent is removed; and removing the solvent progressively through hot air drying, thereby obtaining the polyvinyl alcohol film with excellent performance. The film and the method greatly reduce equipment cost and energy consumption for producing the PVA film, and improve the production efficiency.

Description

Technical field [0001] The invention belongs to the technical field of materials, and specifically relates to a polyvinyl alcohol film and a preparation method thereof. Background technique [0002] According to the different polymerization degree, alcoholysis degree and production method of polyvinyl alcohol resin, it can be made into a variety of excellent performance vinyl alcohol (PVA) films, which are widely used in various fields. PVA is the only material with biodegradable properties among the known synthetic polymer materials, and it is water-soluble, non-toxic and harmless. Therefore, the PVA film with excellent water solubility at low temperature is an ideal green product. Only my country's annual demand for PVA film as a variety of packaging materials will reach tens of thousands of tons. The PVA film that dissolves in water at a higher temperature has excellent properties such as good transparency, toughness, high gloss, resistance to static electricity, and good resi...

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): C08L29/04C08K5/053C08K5/05C08K3/38C08K5/12C08J5/18
Inventor 沈国强
Owner 无锡高拓新材料股份有限公司
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