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Dry-type fused water-soluble biodegradable film and preparation method thereof

A biodegradable and water-soluble technology, applied in the field of dry-melting water-soluble biodegradable film and its preparation, can solve the problems of high energy consumption, high cost, low production efficiency, etc., and achieve the effect of wide application range

Inactive Publication Date: 2011-08-03
ZHUHAI BIOGER BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both dry and wet casting methods have the disadvantages of low production efficiency, high energy consumption, high cost and lack of market competitiveness.
At present, there is no water-soluble biodegradable film blown by dry melt granulation and its preparation method in China.

Method used

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Effect test

Embodiment Construction

[0045] 1. Recipe

[0046] A formulation of a dry-melting water-soluble biodegradable film (in mass percent):

[0047] Refined starch 10-20%;

[0048] Polyvinyl alcohol 60-70%;

[0049] Glycerol 5-10%;

[0050] Compounding additives 5%, which include; plasticizers, dispersants, release agents, reinforcing agents;

[0051] Deionized water 5-10%;

[0052] The refined starch is non-transgenic corn starch, tapioca starch, and transgenic corn starch.

[0053] 2. Preparation method:

[0054] An embodiment of a method for preparing a dry molten water-soluble biodegradable film of the present invention comprises the following steps:

[0055] The first step: take by weight 700 parts of polyvinyl alcohol;

[0056] Step 2: Weigh 100 parts of refined starch by weight, and refine it into granules of more than 1000 meshes by a starch refiner;

[0057] The third step: Weigh 100 parts of deionized water by weight;

[0058] Step 4: Add the aqueous solution, refined starch, and polyviny...

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Abstract

The invention relates to a dry-type fused water-soluble biodegradable film and a preparation method thereof. The main formula components in the film comprise poval and starch. In the preparation method, the poval is subjected to pre-plasticization processing so as to reduce the melting point of the poval, so that the poval is not subjected to decomposition in a temperature interval in the process of co-extrusion, materials maintain required flowability and shearing force, the expected mixing speed and evenly mixing degree are achieved, and finally, a molecule-grade interpenetrating network formed between the starch and the poval is obtained; and on the other hand, the entire plasticization of the starch and the poval is finally obtained through changing the production process and equipment, thereby achieving poval dry fused granulation on a two-screw extruder and processing of a single-layer or multi-layer film product on special film-blowing equipment and completing industrial production. The film has a wide application range, can be used in pesticides, fertilizers, pigments, garden nursing chemical reagents and the like, and also can be used as vegetable seed and plant bags and clothes or food packaging bags.

Description

technical field [0001] The invention relates to the technical field of biodegradable materials, in particular to a dry melting water-soluble biodegradable film and a preparation method thereof. Background technique [0002] In the prior art, water-soluble films are produced by using polyvinyl alcohol as the main raw material. Since the melting temperature of polyvinyl alcohol is very close to the decomposition temperature, it is generally produced by steel plate casting or extrusion T-head casting method. to fulfill. Both dry and wet casting methods have the disadvantages of low production efficiency, high energy consumption, high cost and lack of market competitiveness. At present, there is no water-soluble biodegradable film and preparation method using dry melt granulation for film blowing in China. SUMMARY OF THE INVENTION [0003] Aiming at the deficiencies of the above existing steel plate casting or extrusion T-head casting methods, the purpose of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/02C08K5/053B29B9/06B29C47/92B29C49/78B29C48/92
CPCB29C48/0017B29C48/10B29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 冯硕杨育军路连峰
Owner ZHUHAI BIOGER BIOTECH
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