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Novel polyethylene plastic greenhouse cloth and production method thereof

A technology of polyethylene plastic and shed cloth, applied in chemical instruments and methods, botanical equipment and methods, layered products, etc., can solve the problems of plastic films being easily broken by strong winds, short service life, and tearing, and achieve Good dripping anti-fog effect, long service life and good light transmittance

Inactive Publication Date: 2019-11-26
山东茂华塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional plastic greenhouses use polyethylene plastic film, which has poor strength and poor weather resistance. It is prone to problems such as tearing, abrasion, rapid decrease in light transmittance, and short service life during use. Moreover, the use of plastic film is easy to be blown by strong winds. Farmers bring catastrophic losses, and the film needs to be replaced every year, resulting in cost waste and environmental pollution

Method used

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  • Novel polyethylene plastic greenhouse cloth and production method thereof
  • Novel polyethylene plastic greenhouse cloth and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Production method of the present invention comprises the following steps:

[0022] (1) Preparation of anti-aging masterbatch. After blending various anti-aging additives in proportion according to the mass parts, the anti-aging masterbatch is obtained by granulating through an extruder;

[0023] (2) Drawing and mixing, mix the raw materials required for the middle layer 2 in proportion, and send them to a high-speed mixer to mix evenly;

[0024] (3) Wire drawing, feed the raw material prepared in step 2 into the extruder, heat and plasticize through the screw, the heating temperature is between 180-270 °C, and extrude into a film through the die head molding, and then cooled by water, the water temperature is 30 -45°C, use a blade to cut the film into embryo filaments, and set the draft ratio, stretch it into a flat filament that meets the technical requirements through an oven or a stretching plate, and then heat-set the flat filament to control the thermal shrinkage r...

Embodiment 2

[0029] Perform performance testing on the plastic greenhouses of the present invention and ordinary plastic greenhouses, compare the performance values ​​between the two, and only observe the performance differences. The comparison of the test data between the plastic greenhouse cloth of the present invention and the ordinary plastic greenhouse film is shown in the following table:

[0030]

[0031] It can be seen from the above results that the greenhouse cloth obtained in the present invention has better physical properties, strength index, thermal shrinkage rate and other indexes than ordinary plastic greenhouse film, high strength, good weather resistance, not easy to tear and wear, and good light transmittance. Although the initial light transmittance is slightly lower than that of plastic film, it has good wear resistance and slow light transmittance attenuation.

[0032] The present invention forms a three-layer composite structure by combining the outer layer 1 and t...

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Abstract

The invention discloses a novel polyethylene plastic greenhouse cloth and a production method thereof. The greenhouse cloth is of a three-layer composite structure, and comprises an outer surface layer, an intermediate layer and an inner surface layer; the outer surface layer and the inner surface layer are high-pressure low-density polyethylene lamination layers, the intermediate layer is a low-pressure high-density polyethylene woven cloth, the outer surface layer is prepared from, by mass, 86 parts of polyethylene and 14 parts of an anti-ageing mixture containing double antioxidants, the intermediate layer is prepared from, by mass, 96 parts of polyethylene and 4 parts of an anti-ageing agent, and the inner surface layer is prepared from, by mass, 65 parts of polyethylene and 35 parts of an anti-ageing mixture containing a drip anti-fogging agent. Accordingly, the produced greenhouse cloth is high in strength and good in weather resistance, the greenhouse cloth is reinforced so as to achieve the effects of being not likely to tear and wear, the light transmittance is good, decaying is slow, the service life is long, and the drip anti-fogging effect is good.

Description

technical field [0001] The invention relates to the technical field of plastic greenhouses, in particular to a novel polyethylene plastic greenhouse cloth and a production method thereof. Background technique [0002] Plastic greenhouse, commonly known as cold shed, is a simple and practical protective cultivation facility. Because of its easy construction, convenient use, and low investment, it is widely used by countries all over the world with the development of the plastic industry. It uses bamboo, wood, steel and other materials. And covered with plastic film, set up an arched shed for cultivation of vegetables, can be early or delayed supply, increase the yield per unit area, and help prevent natural disasters, especially in the northern region can supply fresh and tender vegetables in the off-season in early spring and late autumn. [0003] Traditional plastic greenhouses use polyethylene plastic film, which has poor strength and poor weather resistance. It is prone t...

Claims

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Application Information

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IPC IPC(8): A01G9/14B32B27/02B32B27/12B32B27/32B32B27/20B32B7/02B32B33/00B29C48/08B29C55/00B29B9/06
CPCA01G9/1438A01G2009/1453B29B9/06B29C55/00B29C48/0022B29C48/08Y02A40/25
Inventor 高华高嘉伟李涛黄勇李荣浩刘涛周琦
Owner 山东茂华塑料有限公司