Fully biodegradable aliphatic polycarbonate mulch film and preparation method thereof

A biodegradable, polycarbonate technology, used in plant protection covers and other directions, can solve the problems of limited use range, insufficient weather resistance and water resistance, and achieve improved mechanical properties and water resistance, low decomposition rate, and long residual effect time. Effect

Active Publication Date: 2012-08-22
JIANGSU XINGYE PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one of the biggest weaknesses of Mater-Bi is that its temperature resistance, weather resistance and water resistance are not enough, which seriously limits its application range. , high temperature and high humidity environment

Method used

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  • Fully biodegradable aliphatic polycarbonate mulch film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh each component according to the following parts by weight: PBC: 50.0, corn starch: 10, PLA: 35, acetochlor (herbicide): 1.5, silicon dioxide (opening agent): 1.0, stearic acid (lubricant) : 1.5, polyethylene glycol (plasticizer): 4.0, dibutyltin maleate (heat-resistant stabilizer): 1.5, ethyl phosphite (antioxidant): 0.1, titanate coupling agent: 0.5, oxalic acid (biodegradation accelerator): 0.15, cerium stearate (photodegradation agent): 0.5.

[0028] Preparation steps and conditions are:

[0029] Put the PBC, starch and PLA weighed in proportion into the high-speed mixer, start stirring at a low speed, and add the weighed herbicide, anti-blocking agent, lubricant, plasticizer, heat-resistant stabilizer, antioxidant Agent, coupling agent, biodegradation accelerator, photodegradation agent, stirring at low speed for 5 minutes, then adding and stirring at high speed for 10 minutes, after stirring evenly, enter the co-rotating twin-screw extruder. Carry out extru...

Embodiment 2

[0033] Weigh each component according to the following parts by weight: PBC: 50.0, starch phosphate: 20, PLA: 20, alachlor: 1.0, superfine calcium carbonate powder: 1.5, zinc stearate: 2.0, polypropylene glycol adipic acid Ester: 6.0, zinc oxide: 2.0, ethyl phosphite: 0.8, titanate coupling agent: 0.8, oxalic acid: 0.8, cerium stearate: 1.0.

[0034] Preparation steps and conditions are:

[0035] Put the PBC, starch and PLA weighed in proportion into the high-speed mixer, start stirring at a low speed, and add the weighed herbicide, anti-blocking agent, lubricant, plasticizer, heat-resistant stabilizer, antioxidant Agent, coupling agent, biodegradation accelerator, photodegradation agent, stirred at low speed for 10 minutes, then added and stirred at high speed for 15 minutes, stirred evenly, and then entered the co-rotating twin-screw extruder. Carry out extrusion granulation at a temperature of 60-180°C, and then use film blowing equipment to blow film to obtain the require...

Embodiment 3

[0039] Weigh each component according to the following parts by weight: PBC: 40.0, acetate starch: 30, PLA: 35, acetochlor: 2.0, silicon dioxide: 2.0, stearic acid: 3.0, epoxy soybean oil: 7.0, hard Calcium fatty acid: 1.5, bisphenol A: 0.15, titanate coupling agent: 1.0, oxalic acid: 0.7, cerium stearate: 2.0.

[0040] Preparation steps and conditions are:

[0041] Put the PBC, starch and PLA weighed in proportion into the high-speed mixer, start stirring at a low speed, and add the weighed herbicide, anti-blocking agent, lubricant, plasticizer, heat-resistant stabilizer, antioxidant Agent, coupling agent, biodegradation accelerator, photodegradation agent, stirring at low speed for 5 minutes, then adding and stirring at high speed for 5 minutes, after stirring evenly, enter the co-rotating twin-screw extruder. Carry out extrusion granulation at a temperature of 60-180°C, and then use film blowing equipment to blow film to obtain the required film. The test results of the per...

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Abstract

The invention relates to a fully biodegradable aliphatic polycarbonate mulch film and a preparation method thereof. The mulch film comprises the following raw materials by weight ratio: 30-50 parts of aliphatic polycarbonate butanediol ester, 10-50 parts of starch, 10-50 parts of polylactic acid, 1-5 parts of herbicide, 1.0-3.5 parts of antiblocking agent, 0.5-6 parts of lubricant, 4.0-15 parts of plasticizer, 1.5-4 parts of heat-resistance stabilizing agent, 0.05-1.5 parts of anti-oxidant, 0.5-2.0 parts of coupling agent, 0.05-1.5 parts of biodegradation promoter and 0.5-5.0 parts of photodegradation agent. The Fully biodegradable aliphatic polycarbonate mulch film can be prepared by mixing and stirring the raw materials and extruding to granulate by a twin-screw machine. The fully biodegradable aliphatic polycarbonate mulch film of the invention has the advantages of low cost, good temperature toleration, temperature tolerance and water resistance, and is capable of regulating the degradation rate and has the function of weeding.

Description

technical field [0001] The invention relates to a completely biodegradable mulch film, in particular to an aliphatic polycarbonate mulch film and a preparation method thereof. Background technique [0002] my country's plastic film cultivation technology was introduced from Japan in 1978. After experiments and demonstrations, it was quickly popularized and applied in my country. In 1983, the area covered by agricultural plastic film reached 9.437 million mu. From economic crops such as sugar, tobacco, grain and more than 10 fields, so far, my country's agricultural film covers more than 400 million mu of land, and it has reached about 2.7 million tons in 2010, ranking first in the world. However, with the extensive application of mulch film, more and more of its residual film is accumulated in the soil, resulting in the obstruction of soil moisture and nutrient downward migration, and the decrease of soil porosity and permeability, which is not conducive to soil air circulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L3/02C08L3/06C08L3/10C08L3/04C08L67/04C08K13/02C08K5/098C08K5/20C08K5/10A01G13/02
Inventor 薛惠芳顾晓华卞方荣
Owner JIANGSU XINGYE PLASTIC
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