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Weeding master batch for biodegradable agricultural film, and preparation method thereof

A biodegradable and agricultural film technology is applied in the field of herbicidal biodegradable agricultural film masterbatch and its preparation, which can solve the problems of rarely being effectively utilized, and achieve high light resistance, lower production costs, and low light transmittance. Effect

Inactive Publication Date: 2019-04-30
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The pulp and paper industry separates about 140 million tons of cellulose from plants every year, and at the same time obtains a large amount of by-products of papermaking waste, but so far, more than 95% of papermaking waste is still directly discharged into rivers or concentrated and burned. less effective use

Method used

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  • Weeding master batch for biodegradable agricultural film, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A kind of masterbatch for herbicide biodegradable agricultural film of the present embodiment is made up of the raw material of following parts by weight:

[0076] 60 parts of poly(butyleneadipate-co-terephthalate), PBAT, 10 parts of corn starch, 20 parts of pulping waste liquid extract, 10 parts of calcium carbonate, 2 citrates 1 part, 1 part of o-hydroxybenzophenone, 1 part of zinc stearate, 2 parts of phosphite.

[0077] The preparation method of the weeding biodegradable agricultural film masterbatch of the present embodiment is as follows:

[0078] Step 1, drying, pulverizing and sieving the pulping waste liquid extract to obtain the pulping waste liquid extract of 4500-5000 mesh;

[0079] 60 parts of PBAT, 10 parts of corn starch, 20 parts of pulping waste extract, 10 parts of calcium carbonate, 2 parts of citrate, 1 part of o-hydroxybenzophenone, 1 part of zinc stearate and 2 parts of phosphorous acid The ester is added into the high-speed blender in proportion...

Embodiment 2

[0082] A kind of masterbatch for herbicide biodegradable agricultural film of the present embodiment is made up of the raw material of following parts by weight:

[0083] 60 parts of polybutylene adipate / terephthalate (PBAT), 10 parts of tapioca starch, 20 parts of pulp residue, 10 parts of kaolin, 2 parts of citrate, 1 part of o-hydroxybenzophenone, stearic acid 1 part of zinc, 2 parts of phosphite.

[0084] The preparation method of the weeding biodegradable agricultural film masterbatch of the present embodiment is as follows:

[0085] Step 1, drying, pulverizing and sieving pulp residue to obtain pulp residue of 50-100 mesh;

[0086] Add 60 parts of PBAT, 10 parts of tapioca starch, 20 parts of pulp residue, 10 parts of kaolin, 2 parts of citrate, 1 part of o-hydroxybenzophenone, 1 part of zinc stearate and 2 parts of phosphite into the high-speed In a blender, mix for 10 minutes at a temperature of 10°C and a rotation speed of 10 rpm to obtain an initial mixture;

[00...

Embodiment 3

[0089] A kind of masterbatch for herbicide biodegradable agricultural film of the present embodiment is made up of the raw material of following parts by weight: polyadipate / butylene terephthalate (PBAT) 50 parts, polylactic acid (polylactic acid, PLA ) 10 parts, tapioca starch 10 parts, pulping waste liquid extract 20 parts, kaolin 10 parts, citrate 2 parts, o-hydroxybenzophenone 1 part, zinc stearate 1 part, phosphite 2 parts.

[0090] The preparation method of the weeding biodegradable agricultural film masterbatch of the present embodiment is as follows:

[0091] Step 1, drying, pulverizing, and sieving the pulping waste liquid extract to obtain a pulping waste liquid extract of 400 to 500 mesh;

[0092] 50 parts of PBAT, 10 parts of PLA, 10 parts of tapioca starch, 20 parts of pulping waste extract, 10 parts of kaolin, 2 parts of citrate, 1 part of o-hydroxybenzophenone, 1 part of zinc stearate and 2 Parts of phosphite were added in proportion to the high-speed blender, ...

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Abstract

The invention relates to a weeding master batch for a biodegradable agricultural film. The weeding master batch comprises, by weight, 30-90 parts of a degradable material, 10-70 parts of papermaking wastes, 0-30 parts of starch, 0-30 parts of inorganic mineral matters and 0.5-15 parts of assistants. The invention also relates to a preparation method of the weeding master batch for the biodegradable agricultural film. The preparation method has the advantages of great reduction of the production cost of the weeding master batch for the biodegradable agricultural film by adding the papermaking wastes, starch and inorganic mineral matters to the degradable material, effective utilization of the papermaking wastes and reduction of the environment pressure; and the papermaking waste composite weeding master batch has a low light transmittance and a strong light blocking property, so the prepared biodegradable agricultural film has a good weeding property, can block the contact of weeds withlight, and make the weeds unable to photosynthesize.

Description

technical field [0001] The invention relates to the technical field of degradable composite materials, in particular to a masterbatch for weeding and biodegradable agricultural films and a preparation method thereof. Background technique [0002] According to the statistics of the Food and Agriculture Organization of the United Nations, the world's average annual yield reduction due to weed damage is 10-15%. Due to the long-term, large-scale, excessive, and continuous use of herbicides, weeds develop resistance, and the toxic and negative effects of herbicide residues become more prominent, harming crops; organic chlorine, organic phosphorus pollution in soil and water, Fatal damage has been done to microbial populations and crops in the soil, while weeds have become more resistant to pesticides, polluting the environment and destroying soil textures. [0003] The agricultural mulch currently used mostly uses polyethylene (PE), which can achieve a certain heat preservation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08L97/02C08K3/26C08K5/11C08K5/132C08K5/524C08K13/02C08K3/34C08J3/22
CPCC08J3/226C08K13/02C08K2003/265C08J2403/02C08J2467/02C08K3/346C08K5/11C08K5/132C08K5/524B29B7/002B29B7/7461B29B7/90B29B7/92B29B9/12B29B9/06B29B7/10B29B7/48B29B9/16
Inventor 施晓旦郝鲁峰郑璐
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD
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