Heat-insulation water-control degradable mulch preparation method

A technology for degrading mulch and heat preservation, applied in botany equipment and methods, plant protection, plant protection covers, etc., can solve the problems of low degradation rate and untargeted production and preparation methods, achieve high degradation rate and improve overall mechanical properties Effect

Active Publication Date: 2017-10-17
成都硕谷农业科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0004] Aiming at the problems of low degradation rate and non-targeted production and preparation methods in the above prior art, the present invention proposes

Method used

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  • Heat-insulation water-control degradable mulch preparation method

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Example Embodiment

[0027] Examples:

[0028] This embodiment discloses a method for preparing a heat-preserving and water-controlling degradable mulch film, the steps of which include:

[0029] 1. Select raw materials and pre-process

[0030] First select the raw materials according to the mass score:

[0031] Polylactic acid 20%-40%;

[0032] Polycarbonate 25-30%;

[0033] Polyethylene adipate 20-35%;

[0034] Graft type compatibilizer 15-18%.

[0035] All raw materials are dried first to avoid the poor quality of subsequent granulation caused by excessive moisture. Then, the dried polylactic acid and polycarbonate were put into vacuum drying equipment, and the secondary baking was performed at 76°C for 17 hours, in order to improve the compatibility during subsequent melt copolymerization.

[0036] 2. Stir and mix the raw materials

[0037] Then the baked polylactic acid is taken out, and the prepared polyethylene adipate, grafted compatibilizer and polylactic acid are mixed, put into a high-speed mixer and...

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Abstract

The invention discloses a heat-insulation water-control degradable mulch preparation method. The method includes steps: 1) selecting raw materials including polylactic acid, polycarbonate, polyethyleneglycol adipate and a grafting compatibilizer according to mass fractions; 2) subjecting polylactic acid and polycarbonate to step-by-step baking in a vacuum environment; 3) stirring polylactic acid, polyethyleneglycol adipate and the grafting compatibilizer in a stirrer according to a weight ratio; 4) subjecting well mixed raw materials to primary melt copolymerization in a melt granulator; 5) well stirring particles of a product A and baked polycarbonate in the stirrer, and subjecting to secondary melt copolymerization in the melt granulator; 6) transferring particles of a product B to a film blowing machine for film blowing to obtain a mulch; 7) subjecting a prepared mulch product to strength detection. The prepared mulch is high in degradation rate, high in integral mechanical performance and great in water retaining property.

Description

technical field [0001] The invention belongs to the field of chemical methods, and in particular relates to a preparation method of a degradable plastic film for heat preservation and water control. Background technique [0002] The use of agricultural mulch film reaches more than 1 million tons per year, and is continuing to develop at a relatively high speed. However, while the use of plastic film has brought huge economic benefits to the society, it has also brought serious "white pollution". When the plastic film covering cultivation technology is becoming more and more perfect, the problem of residual film pollution must be solved, so that all functions of plastic film cultivation can be fully realized. Give full play to improve crop production conditions and increase crop yield in a larger space. In order to solve the "white pollution" problem caused by ordinary mulch, scientists proposed the concept of degradable plastics. The use of degradable plastic film is an ef...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L69/00C08L67/02C08L23/08A01G13/02B29C55/28
CPCA01G13/0275B29C55/28C08J5/18C08J2367/02C08J2367/04C08J2369/00C08J2423/08C08L67/02C08L67/04C08L69/00C08L2201/06C08L2203/16C08L2205/08C08L23/0869
Inventor 吴艳蓉杜德新
Owner 成都硕谷农业科技有限公司
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