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Degradable mulch film and preparation method thereof

A technology for degrading plastic film and polyethylene, applied in the direction of plant protection cover, etc., can solve the problems of difficult degradation of plastic film and low strength, and achieve the effect of fast degradation speed and high strength

Inactive Publication Date: 2013-01-02
苏州市德莱尔建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above comments on the prior art, the technical problem to be solved by the present invention is: the conventional plastic film is not easy to degrade, and the strength is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh each component according to the following weight and prepare the film: 10 parts of polyethylene, 10 parts of polypropylene, 3 parts of polyvinyl alcohol, 2 parts of polymethylethylene carbonate, 3 parts of polylactic acid, 3-hydroxybutyrate - 1 part of 4-hydroxybutyrate copolymer, 6 parts of chitosan, 4 parts of polyolefin resin, 2 parts of polypropylene glycol, 0.5 part of nano-scale titanium dioxide, 0.5 part of photodecomposition agent, 15 parts of inorganic filler, 5 parts of starch .

[0025] The molecular weight of the above-mentioned polypropylene glycol is 1000-2000, and the functionality is 2; the molecular weight of the above-mentioned polylactic acid is 200000-300000; the molecular weight of the above-mentioned polymethylethylene carbonate is 100000-300000; the above-mentioned starch is corn starch; The above-mentioned polyethylene is high-density polyethylene; the above-mentioned photodecomposing agent is iron acetylacetonate; the above-mentioned inorg...

Embodiment 2

[0027] Weigh each component according to the following weight and prepare the film: 20 parts of polyethylene, 20 parts of polypropylene, 2 parts of polyvinyl alcohol, 1 part of polymethylethylene carbonate, 5 parts of polylactic acid, 3-hydroxybutyrate - 2 parts of 4-hydroxybutyrate copolymer, 4 parts of chitosan, 2 parts of polyolefin resin, 4 parts of polypropylene glycol, 0.5 parts of nano-sized titanium dioxide, 0.5 parts of photodecomposition agent, 5 parts of inorganic filler, 15 parts of starch . The difference with Example 1 is: the above-mentioned starch is potato starch; the above-mentioned polyethylene is linear low-density polyethylene; the above-mentioned photodecomposing agent is 2-hydroxyl-4-methyl acetophenone oxime iron; It's talc.

Embodiment 3

[0029] Weigh each component according to the following weight and prepare the film: 15 parts of polyethylene, 15 parts of polypropylene, 3 parts of polyvinyl alcohol, 1 part of polymethylethylene carbonate, 4 parts of polylactic acid, 3-hydroxybutyrate - 2 parts of 4-hydroxybutyrate copolymer, 5 parts of chitosan, 3 parts of polyolefin resin, 3 parts of polypropylene glycol, 0.5 parts of nano-scale titanium dioxide, 0.5 parts of photodecomposition agent, 10 parts of inorganic filler, 10 parts of starch . The difference from Example 1 is: the above-mentioned starch is tapioca starch; the above-mentioned polyethylene is high-density polyethylene; the above-mentioned photodecomposing agent is iron stearate; the above-mentioned inorganic filler is calcium silicate.

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Abstract

The invention provides a degradable mulch film and a preparation method thereof, which belongs to the technical field of high polymer materials. The degradable mulch film comprises, by weight, 10 to 20 parts of polyethylene, 10 to 20 parts of polypropylene, 2 to 3 parts of polyvinyl alcohol, 1 to 2 parts of poly propylene carbonate, 3 to 5 parts of polylactic acid, 1 to 2 parts of poly(3-hydroxybutyrate-co-4-hydroxybutyrate), 4 to 6 parts of chitosan, 2 to 4 parts of methyl-polyolefin resin, 2 to 4 parts of polypropylene glycol, 0.5 part of nanometer titanium dioxide, 0.5 part of a photolysis agent, 5 to 15 parts of an inorganic filling material and 5 to 15 parts of starch. The degradable mulch film provided by the invention has the following advantages: 1, a fast degradation fast, and a fast degradation rate of more than 35% within 120 d; 2, high strength, transverse tensile strength of more than 16 MPa and vertical tensile strength of more than 17 MPa.

Description

technical field [0001] The invention provides a degradable plastic film and a preparation method thereof, in particular to a titanium dioxide-added plastic film and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Plastic film plays an important role in the process of agricultural production in our country. It not only has the functions of heat preservation, moisturizing and fertilizer preservation, but also has the functions of preventing diseases and insect pests, preventing drought and waterlogging, which can promote the growth and development of crops, increase crop yield and increase production efficiency. [0003] Traditional agricultural mulch is made of polyethylene plastic. With the large-scale use of mulch, a large number of mulch fragments will remain in the soil. Under natural conditions, traditional polyethylene plastics are difficult to decompose, which will not only damage the soil structure, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/12C08L29/04C08L69/00C08L67/04C08L5/08C08L23/00C08L71/08C08L3/02C08K3/22C08K3/26C08K3/34A01G13/02
Inventor 计慷
Owner 苏州市德莱尔建材科技有限公司
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