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
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  • 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,

Method used

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  • 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.

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PUM

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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

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Application Information

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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
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