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Heat insulating mulching

A high thermal insulation, mulching technology, applied in applications, organic fertilizers, soil conditioning materials, etc., can solve problems such as affecting the growth and development of crop roots, large temperature difference between day and night in the soil under the film, and easy to lose a large amount of surface heat, so as to enhance the disease resistance of crops. capacity, increased yield and quality, and the effect of shortening the growth cycle of crops

Inactive Publication Date: 2006-10-18
兰州定元塑料制品有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has the following disadvantages in the application of agricultural production: since the surface heat at night is mainly lost in the form of infrared radiation heat, its radiation wavelength is between 3-40 μm, especially concentrated between 7-11 μm
This defect leads to a large amount of surface heat loss in the film at night, resulting in a relatively large temperature difference between day and night in the soil under the film, which seriously affects the growth and development of crop roots.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. First, take 40 kg of ethylene-vinyl acetate copolymer resin, 30 kg of heavy calcium carbonate, 15 kg of polyethylene wax and industrial white oil, and 15 kg of drip agent in proportion. After the four materials are fully mixed, use twin-screw granulation The unit is made into ethylene-vinyl acetate copolymer resin special thermal insulation masterbatch;

[0015] 2. Take again in proportion: 10kg of ethylene-vinyl acetate copolymer resin, 80kg of linear low-density polyethylene, and 10kg of special insulation master batch for ethylene-vinyl acetate copolymer resin. After mixing the three materials, pass through the film blowing unit. Processing and forming to obtain finished products.

Embodiment 2

[0017] 1. First, take 60kg of ethylene-vinyl acetate copolymer resin, 20kg of kaolin, 10kg of stearic acid and polyethylene wax, and 10kg of dripping agent in proportion. After the four materials are fully mixed, use a twin-screw granulation unit to make Thermal insulation masterbatch for ethylene-vinyl acetate copolymer resin;

[0018] 2. Take again in proportion: 25kg of ethylene-vinyl acetate copolymer resin, 60kg of linear low-density polyethylene, 15kg of special insulation master batch for ethylene-vinyl acetate copolymer resin, and pass through the blown film unit after mixing the three materials. Processing and forming to obtain finished products.

Embodiment 3

[0020] 1. First, take 45kg of ethylene-vinyl acetate copolymer resin, 15kg of sericite, 15kg of titanate coupling agent and stearic acid, and 25kg of dripping agent in proportion. After the four materials are fully mixed, use a twin screw to make The granulation unit is made into the special heat preservation master batch for ethylene-vinyl acetate copolymer resin:

[0021] 2. Take again in proportion: 25kg of ethylene-vinyl acetate copolymer resin, 60kg of linear low-density polyethylene, 15kg of special insulation master batch for ethylene-vinyl acetate copolymer resin, and pass through the blown film unit after mixing the three materials. Processing and forming to obtain finished products.

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Abstract

The heat insulating mulching has ethylene-vinyl acetate copolymer resin carrier and is prepared through preparing heat insulating agglomerate with ethylene-vinyl acetate copolymer 40-60 %, inorganic heat insulating agent 20-30 %, solubilizer 10-15 % and dripping agent 10-15 % and through mixing and extruding in a double screw extruder; mixing ethylene-vinyl acetate copolymer resin 10-25 %, linear low density polyethylene 60-80 % and the heat insulating agglomerate 10-15 % and processing with a blow molding machine. The present invention has excellent heat insulating performance and is favorable to crop root system growth and high crop yield and quality.

Description

Technical field [0001] The invention relates to the field of agricultural plastic ground covering films, in particular to a high-insulation ground film using ethylene-vinyl acetate copolymer. Background technique [0002] At present, the widely used agricultural plastic floor covering film processing materials are mainly linear low-density polyethylene (LLDPE) and a small amount of high-pressure low-density polyethylene (LDPE), high-density polyethylene (HDPE) two or three resin blends It is processed by extrusion and blow molding. It has the following shortcomings in agricultural production applications: Because the surface heat at night is mainly lost in the form of infrared radiant heat, its radiation wavelength is 3-40μm, especially concentrated between 7-11μm. The infrared transmittance of polyethylene to 3-40μm is between 85-90%. This defect causes the surface heat in the membrane to be easily lost at night, causing the soil under the membrane to have a large temperature di...

Claims

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Application Information

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IPC IPC(8): C08J5/18B29C49/00C08K3/34C08L23/08C09K17/52
Inventor 张智虎黄清史成成尹长宏张亚琴
Owner 兰州定元塑料制品有限责任公司
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