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Manufacturing method of biodegradable mulching film for rice

A technology of biodegradation and production method, which is applied in the production field of biodegradable mulch film for rice, can solve problems such as impact, and achieve the effects of reducing the adhesion of dew or water droplets, prolonging the life of mulch film and improving grain yield.

Inactive Publication Date: 2021-03-05
河南龙都天仁生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for making biodegradable mulch film for rice, which mainly solves the needs of rice planting and growth in Northeast China, is resistant to ultraviolet rays and temperature difference shocks, and prolongs the use time of mulch film. plowing with the soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for making a biodegradable mulch film for rice, comprising the following components in parts by weight: 60 parts of polylactic acid, 15 parts of degradable masterbatch, 2 parts of PVC smoothing agent, 1.5 parts of PET anti-hydrolysis agent, and 0.3 parts of PVC heat stabilizer , 0.5 parts of light stabilizer and 0.01 parts of antioxidant TNP. Step 1: Put the polylactic acid and the degraded masterbatch in a drying oven and dry at 50-75°C until the moisture content is lower than 400ppm; Step 2: Put the dried polylactic acid and the degraded masterbatch into the mixer for low-speed stirring; stir At the same time, add PVC lubricant, PET anti-hydrolysis agent, PVC heat stabilizer, light stabilizer and antioxidant TNP in turn, and put the mixed material into the feed port of the extruder; Step 3: Extrude the extruded After the material is cooled, it is put into a pulverizer for crushing. After the crushed material is dried in a drying oven at 50-75°C, the water con...

Embodiment 2

[0019] A method for making a biodegradable mulch film for rice, comprising the following components in parts by weight: 75 parts of the polylactic acid, 20 parts of a degradation masterbatch, 6 parts of a PVC smoothing agent, 4 parts of a PET anti-hydrolysis agent, and a PVC heat stabilizer 1.5 parts, 1 part of light stabilizer and 0.5 parts of antioxidant TNP. Step 1: Put the polylactic acid and the degraded masterbatch in a drying oven and dry at 50-75°C until the moisture content is lower than 400ppm; Step 2: Put the dried polylactic acid and the degraded masterbatch into the mixer for low-speed stirring; stir At the same time, add PVC lubricant, PET anti-hydrolysis agent, PVC heat stabilizer, light stabilizer and antioxidant TNP in turn, and put the mixed material into the feed port of the extruder; Step 3: Extrude the extruded After the material is cooled, it is put into a pulverizer for crushing. After the crushed material is dried in a drying oven at 50-75°C, the water ...

Embodiment 3

[0021] A method for making a biodegradable mulch film for rice, comprising the following components in parts by weight: 80 parts of the polylactic acid, 35 parts of a degradation masterbatch, 8 parts of a PVC smoothing agent, 6 parts of a PET anti-hydrolysis agent, and a PVC heat stabilizer 3 parts, 2 parts of light stabilizer and 1.5 parts of antioxidant TNP. Step 1: Put the polylactic acid and the degraded masterbatch in a drying oven and dry at 50-75°C until the moisture content is lower than 400ppm; Step 2: Put the dried polylactic acid and the degraded masterbatch into the mixer for low-speed stirring; stir At the same time, add PVC lubricant, PET anti-hydrolysis agent, PVC heat stabilizer, light stabilizer and antioxidant TNP in turn, and put the mixed material into the feed port of the extruder; Step 3: Extrude the extruded After the material is cooled, it is put into a pulverizer for crushing. After the crushed material is dried in a drying oven at 50-75°C, the water c...

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Abstract

The invention discloses a manufacturing method of a biodegradable mulching film for rice. The biodegradable mulching film is prepared from the following components, by weight: 60-80 parts of polylactic acid, 15-35 parts of degradable master batch, 2-8 parts of a PVC (Polyvinyl Chloride) smoothing agent, 1.5-6 parts of a PET (Polyethylene Terephthalate) anti-hydrolysis agent, 0.3-3 part of a PVC heat stabilizer, 0.5-2 part of a light stabilizer and 0.01-1.5 part of an antioxidant TNP. The modified material is obtained by mixing and stirring the polylactic acid and the degradable master batch and sequentially adding the PVC smoothing agent, the PET hydrolysis-resistant agent, the PVC heat stabilizer, the light stabilizer and the antioxidant TNP. The raw materials used in the invention are all biodegradable substances and have no pollution to the environment; the compatibility among the raw materials is good; the film is low in cost and low in product price, and all materials are non-starch substances.

Description

technical field [0001] The invention relates to the technical field of degradable materials, in particular to a method for making a biodegradable mulch film for rice. Background technique [0002] Agricultural mulch film has the functions of increasing ground temperature, water retention, soil protection, pest control, and weed growth inhibition, which can increase crop production and income. However, under normal circumstances, rice cannot be planted with plastic film, and the rice planting area is affected by geographical and climatic factors. Our country has a large area of ​​rice planting, and promoting the use of plastic film in rice planting can not only effectively increase food production, improve the economic income of local farmers, but also solve the problem of food crisis. [0003] However, mulch is widely used but not properly recycled, and the residue of mulch in farmland leads to white pollution. The mulch film currently used is generally made of polyethylen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/526C08K5/57C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2367/04C08K5/526C08K5/57Y02A40/28
Inventor 夏建平杨文军朱智勇周勇军
Owner 河南龙都天仁生物材料有限公司
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