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Modified starch compound mulching film

A starch and mulching film technology, applied in the field of polymer materials, can solve the problems of soil losing water and fertilizer retention properties, destroying the original structure of the soil, secondary soil salinization and the like, achieving low preparation cost, simple preparation process and easy operation. and control effects

Inactive Publication Date: 2017-01-04
欧小宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing mulch films are polymer refractory plastic films. After the crops are harvested, they remain in the soil, which is difficult to degrade, destroys the original structure of the soil, and makes the soil lose its water and fertilizer retention properties. In severe cases, it will cause groundwater to be difficult to infiltrate and Severe secondary salinization of soil and other consequences

Method used

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  • Modified starch compound mulching film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Raw materials are selected according to the following proportions:

[0018] 25 parts of polypropylene, 55 parts of acetate starch, 9 parts of polyvinyl alcohol, 7 parts of plasticizer, 2 parts of dispersant, 0.8 part of nano titanium dioxide;

[0019] Preparation steps:

[0020] 1) drying acetate starch at 80°C;

[0021] 2) Place polypropylene, acetate starch, plasticizer, dispersant, and nano-titanium dioxide in a high-speed mixer at a speed of 3000 rpm, stir for 6 minutes, and discharge;

[0022] 3) The mixture in step 2 is hot-melt extruded and blow-molded at 155°C to make a tubular mulch film, which is then cut and packaged.

Embodiment 2

[0024] Raw materials are selected according to the following proportions:

[0025] Polypropylene 22, acetate starch 58, polyvinyl alcohol 7, plasticizer 8 parts, dispersant 3 parts, nano titanium dioxide 1 part;

[0026] Preparation steps:

[0027] 1) drying acetate starch at 80°C;

[0028] 2) Place polypropylene, acetate starch, polyvinyl alcohol, plasticizer, dispersant, and nano-titanium dioxide in a high-speed mixer at a speed of 3500 rpm, stir for 5 minutes, and discharge;

[0029] 3) The mixture in step 2 is hot-melt extruded and blow-molded at 160°C to make a tubular mulch film, which is then cut and packaged.

Embodiment 3

[0031] Raw materials are selected according to the following proportions:

[0032] 30 parts of polypropylene, 52 parts of acetate starch, 5 parts of polyvinyl alcohol, 6 parts of plasticizer, 2 parts of dispersant, 0.8 part of nano titanium dioxide;

[0033] Preparation steps:

[0034] 1) drying acetate starch at 80°C;

[0035] 2) Place polypropylene, acetate starch, polyvinyl alcohol, plasticizer, dispersant, and nano-titanium dioxide in a high-speed mixer at a speed of 3800 rpm, stir for 6 minutes, and discharge;

[0036] 3) The mixture in step 2 is hot-melt extruded and blow-molded at 170°C to make a tubular mulch film, which is then cut and packaged.

[0037] The content provided above is only a preferred embodiment of the modified starch composite mulching film of the present invention and its manufacturing method. Of course, the scope of rights of the present invention cannot be limited by this. Therefore, the equivalent changes made according to the patent scope of th...

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Abstract

The invention provides a modified starch compound mulching film. The modified starch compound mulching film is prepared from, by weight, 20-30 parts of polypropylene, 50-60 parts of starch acetate, 5-10 parts of polyvinyl alcohol, 5-10 parts of plasticizer, 1-5 parts of dispersant and 0.5-1.5 parts of nano-titanium dioxide. The modified starch compound mulching film is easy to prepare, low in cost, degradable and safe in modified starch compounding.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a modified starch composite film and a preparation method thereof. Background technique [0002] Mulch film is a ground covering film, which is used for ground covering to increase soil temperature, maintain soil moisture, maintain soil structure, prevent pests from invading crops and diseases caused by certain microorganisms, etc., and promote plant growth. The promotion of plastic film covering technology has also effectively promoted the development of chemical industry, light industry, agricultural machinery manufacturing, agricultural materials supply and marketing, transportation and other related industries. [0003] Most of the existing mulch films are polymer refractory plastic films. After the crops are harvested, they remain in the soil, which is difficult to degrade, destroys the original structure of the soil, and makes the soil lose its water and fertili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/06C08L23/12C08L29/04C08K3/22
CPCC08L3/06C08L2201/06C08L2201/08C08L2203/16C08L2205/03C08L23/12C08L29/04C08K2003/2241
Inventor 欧小宇
Owner 欧小宇
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