Fully biodegradable aliphatic polycarbonate mulch film and preparation method thereof

A biodegradable polycarbonate technology, applied to plant protection covers, etc., can solve the problems of insufficient weather resistance and water resistance, and limit the scope of use, so as to improve mechanical properties and water resistance, low decomposition rate, and high melt strength Effect

Active Publication Date: 2012-01-11
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
  • Fully biodegradable aliphatic polycarbonate mulch film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh the components in 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, dibutyl tin 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] The preparation steps and conditions are:

[0029] Put the PBC, starch and PLA weighed in proportion into the high-speed mixer, start mixing at low speed, and add the weighed herbicide, opener, lubricant, plasticizer, heat-resistant stabilizer, and antioxidant while stirring. Stirring agent, coupling agent, biodegradation accelerator, and photodegradation agent at low speed for 5 minutes, then add it and stir at high speed for 10 minutes, stir evenly, and enter the same-rotating twin-screw extruder. Extrusion and granulation a...

Embodiment 2

[0033] Weigh the components according to the following parts by weight: PBC: 50.0, phosphate starch: 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] The preparation steps and conditions are:

[0035] Put the PBC, starch and PLA weighed in proportion into the high-speed mixer, start mixing at low speed, and add the weighed herbicide, opener, lubricant, plasticizer, heat-resistant stabilizer, and antioxidant while stirring. Stirring agent, coupling agent, biodegradation accelerator, and photodegradation agent at low speed for 10 minutes, then add it and stir at high speed for 15 minutes, after stirring, enter the same direction twin-screw extruder. Extrusion and granulation are performed at a temperature of 60-180°C, and then film blowing is performed using film blowing equipment to...

Embodiment 3

[0039] Weigh each component according to the following parts by weight: PBC: 40.0, starch acetate: 30, PLA: 35, acetochlor: 2.0, silicon dioxide: 2.0, stearic acid: 3.0, epoxidized 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] The preparation steps and conditions are:

[0041] Put the PBC, starch and PLA weighed in proportion into the high-speed mixer, start mixing at low speed, and add the weighed herbicide, opener, lubricant, plasticizer, heat-resistant stabilizer, and antioxidant while stirring. Stirring agent, coupling agent, biodegradation accelerator, and photodegradation agent at low speed for 5 minutes, then add it and stir at high speed for 5 minutes, after stirring, enter the same-rotating twin-screw extruder. Extrusion and granulation are performed at a temperature of 60-180°C, and then film blowing is performed using film blowing equipment to obtain the desired film. Se...

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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 mulching film, in particular to an aliphatic polycarbonate mulching film and a preparation method thereof. Background technique [0002] my country’s plastic film cultivation technology was introduced from Japan in 1978. After trial and demonstration, it has been quickly promoted and applied in my country. In 1983, the area covered by agricultural plastic film reached 9.437 million mu. With the application of this technology from the initial vegetable, peanut, and cotton covering, it has developed In more than 10 fields of cash crops such as sugar, tobacco, and grain, so far, my country's agricultural film covers more than 400 million mu of land. In 2010, it has reached about 2.7 million tons, ranking first in the world. However, with the large-scale application of mulch film, more and more of the residual film accumulates in the soil, resulting in soil moisture, the downward migration of nutrients is hinde...

Claims

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Application Information

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Patent Type & Authority Applications(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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