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Mulching film

A technology of mulch and vinyl acetate, applied in coatings, plant protection covers, etc., can solve problems such as difficult recycling, refractory mulch degradation, soil and environmental damage, etc., to avoid white pollution, good moisture permeability, increase aggregate structure and The effect of breathability

Active Publication Date: 2015-12-30
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of mulch film is extremely difficult to degrade and difficult to recycle, causing damage to the soil and the environment, and is recognized as "white pollution".

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Moisture retention test of plastic film

[0027] Take 3 parts of sand and weigh them separately. Sample No. 1 is a blank test site. Mix 6 parts by weight of vinyl acetate-ethylene-vinyl tert-carbonate with 94 parts by weight of water to uniformly make pulp, respectively according to 1kg / m 2 and 1.5kg / m 2 Spray on the surface of No. 2 and No. 3 sandy soil, and form a plastic film after the surface of No. 2 and No. 3 samples is solidified, and spray the same amount of water on the 3 samples. Then place the sample in sunny weather with high temperature to dry naturally, weigh every 1 hour, and calculate the evaporation of the sample.

[0028] Take 3 parts of sand and weigh them separately. Sample No. 1 is a blank test site. Mix 4 parts by weight of vinyl acetate-vinyl tert-carbonate-maleic acid ester with 96 parts by weight of water to make pulp uniformly, respectively according to 1kg / m 2 and 1.5kg / m 2 Spray on the surface of No. 2 and No. 3 sandy soil, a...

Embodiment 2

[0032] Embodiment 2 insulation test

[0033] Draw 3 blocks of 10m in a certain outdoor plot 2 The first piece of land was used as a blank test. On the second piece of land, use 15 parts of vinyl acetate-ethylene-vinyl tert-carbonate emulsion and 85 parts of water to uniformly mix the emulsion according to 1.5kg / m 2 Spray evenly on the surface of the land to cure the conjunctiva. On the third piece of land, use 15 parts of vinyl acetate-ethylene-vinyl tert-carbonate emulsion and 85 parts of water to uniformly mix the emulsion according to 3kg / m 2 Spray evenly on the surface of the land to cure the conjunctiva. The thermometers were inserted 10cm below the surface of the three lands, and the temperature of the three soils was recorded at the same time every hour, and the soil temperature and time curves were obtained as shown in figure 2 . The test results show that the temperature of the soil sprayed with the emulsion is 0.4-1.6°C higher than that of the soil without the ...

Embodiment 3

[0035] Embodiment 3 replaces traditional plastic mulch test

[0036] Draw the same three equal parts on the land, fertilize and water first during the sowing season, then sow corn on demand, and finally cover the soil. The first part of the land is used as a blank test, and 6 parts of vinyl acetate-acrylic octyl Mix ester copolymer emulsion and 94 parts of water evenly, according to 2kg / m 2 The dosage is sprayed on the soil surface, and the third piece of land is covered with general agricultural plastic mulch. Three points of land respectively insert the thermometer 10cm below the surface. According to the management of traditional agricultural planting methods, the soil temperature is measured regularly, and the emergence rate of corn is recorded. According to the test, the maize emergence rate in the test site 1 was 82%, that in the test site 2 was 98%, and that in the test site 3 was 97.5%. The soil temperature and time curve obtained from the test is shown in image 3...

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Abstract

Mulching film is prepared from, by weight, 2-15 parts of vinyl acetate-ethylene-vinyl versatate and 85-98 parts of water, or 2-15 parts of vinyl acetate-vinyl versatate-mleic acid ester and 85-98 parts of water, or 2-15 parts of vinyl acetate-acrylic ester and 85-98 parts of water, or 2-15 parts of vinyl acetate-ethylene-acrylic ester and 85-98 parts of water. By means of the mulching film, traditional plastic mulching film which is difficult to degrade for recycling is replaced, the functions of the mulching film for soil moisture conservation and temperature conservation of soil are achieved, and white pollution is avoided. In addition, the mulching film is left on a consolidation layer on the surface of sandy soil or the soil, when the mulching film enters the sandy soil or the soil, increasing of granular structures and improvement of breathability are facilitated, and improvement of the sandy soil and the soil and the plant growth are facilitated.

Description

technical field [0001] The invention relates to a mulch film, which can be widely used in agricultural and industrial fields. Background technique [0002] Soil moisture preservation and heat preservation are important means to improve planting effectiveness in agriculture, forestry, and horticulture. At present, plastic mulch (such as PE, PP, etc.) is mainly used to cover. However, this kind of mulch is extremely difficult to degrade, difficult to recycle, and causes damage to the soil and the environment, which is recognized as "white pollution". [0003] At present, vinyl acetate polymers and their derivatives are mainly used in traditional fields such as adhesives, coatings, paper, chewing gum bases and fabric finishing agents. Contents of the invention [0004] The purpose of the present invention is to provide an environmentally friendly and degradable mulch film with moisture retention, good thermal insulation effect and good moisture permeability. [0005] The ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D131/04C08L31/04A01G13/02
Inventor 刘斌曹勇宁威邱萱贺德彬
Owner CHINA PETROCHEMICAL CORP
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