Degradable film containing starch and preparation method of degradable film

A technology for degrading film and starch, which is applied in the field of polymer materials, can solve the problems of poor water resistance, difficult processing, poor mechanical properties, etc., and achieve the effect of excellent strength

Inactive Publication Date: 2013-08-28
SUZHOU FUTONG NEW MATERIALS & HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, for biodegradable mulches, starch and other natural polymer materials are generally used as raw mat

Method used

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  • Degradable film containing starch and preparation method of degradable film

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Experimental program
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Embodiment Construction

[0018] The weight proportion of table 1 embodiment 1~embodiment 3

[0019]

[0020] In the foregoing embodiment, cornstarch is used for vegetable starch; carboxymethyl cellulose is used for cellulose; ethylene glycol is used for plasticizer; the particle size of titanium dioxide is 10 to 50 microns; 550.

[0021] The preparation steps are:

[0022] S1: Mix vegetable starch, polyethylene, polyacrylamide, polycyclic lactone, phenolic resin, soybean protein, polybutylene succinate, methyl acrylate, polyethylene wax, plasticizer, and coupling agent evenly ;

[0023] S2: Put the mixture obtained in step S1 into the hopper of the twin-screw extruder, then put calcium carbonate, titanium dioxide, and cellulose into the side feeding hopper of the extruder, and perform melting, mixing, extrusion, cooling, and drying , Diced into pellets, and you get it. The screw temperature of the twin-screw extruder is controlled between 190-210° C., and the screw speed is controlled at 140-16...

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Abstract

The invention provides an agricultural film material and particularly relates to a degradable film material containing starch serving as a raw material, belonging to the technical field of high molecular materials. The degradable film comprises the following raw materials in parts by weight: 20-30 parts of plant starch, 20-30 parts of polyethylene, 5-10 parts of calcium carbonate, 2-4 parts of polyacrylamide, 2-4 parts of poly cyclic lactone, 4-8 parts of phenol aldehyde resin, 3-6 parts of soybean protein, 2-3 parts of polybutylene succinate, 4-6 parts of methyl acrylate, 5-10 parts of polyethylene wax, 3-5 parts of titanium dioxide, 8-14 parts of cellulose, 2-4 parts of plasticizer and 2-4 parts of coupling agent. The degradable film provided by the invention has excellent strength, the tensile strength of the degradable film can be higher than 16MPa, the light transmittance can be higher than 88%, and the degradable film can be generally degraded within 4-6 months.

Description

technical field [0001] The invention provides an agricultural film material, in particular a degradable film material containing starch as a raw material, belonging to the technical field of polymer materials. Background technique [0002] Agricultural plastic mulch was adopted in agricultural production in the 1950s. In 1955, Japan first applied it to strawberry production, and then, in the early 1960s, countries such as France, Italy, and the United States began to use plastic film in the cultivation of vegetables, strawberries, coffee, tobacco, and cotton. my country introduced agricultural mulch film from Japan in 1978, and it is widely used in domestic crop cultivation. In order to make full use of the production-increasing effect of plastic mulch and eliminate the problems of land fertility decline and environmental pollution caused by plastic mulch, developed countries have successively begun to study degradable mulch. [0003] At present, the main degradable mulch ...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L23/06C08L33/26C08L67/04C08L61/06C08L89/00C08L67/02C08L1/28C08K13/02C08K3/26C08K5/101C08K3/22
Inventor 陈健张建光杨文乾
Owner SUZHOU FUTONG NEW MATERIALS & HIGH TECH
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