High-performance PE/EVA (Polyurethane/Ethylene Vinyl Acetate) composite multifunctional greenhouse film

A multi-functional, high-performance technology, applied in synthetic resin layered products, climate change adaptation, horticulture, etc., can solve the problems of reducing crop yield and quality, weakening greenhouse insulation effect, reducing film light transmittance, etc., and achieves significant thermal insulation. Performance, dripping and anti-fog longevity, good light transmission effect

Inactive Publication Date: 2012-03-14
ZIBO VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fog droplets refract light, greatly reducing the light transmittance of the film; fog droplets falling on crops will cause them to wither, reducing the yield and quality of crops; Humid

Method used

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  • High-performance PE/EVA (Polyurethane/Ethylene Vinyl Acetate) composite multifunctional greenhouse film
  • High-performance PE/EVA (Polyurethane/Ethylene Vinyl Acetate) composite multifunctional greenhouse film
  • High-performance PE/EVA (Polyurethane/Ethylene Vinyl Acetate) composite multifunctional greenhouse film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The composite multi-functional shed film of the present invention is composed of inner, middle and outer three-layer films through blow molding process, wherein the inner, middle and outer films are respectively made of the following raw materials in parts by weight :

[0022] inner layer:

[0023]

[0024] Middle:

[0025]

[0026]

[0027] Outer layer:

[0028] LLDPE 100 parts LDPE 57.11 parts

[0029] mLLDPE 58.42 parts Light stabilizer 783 1.08 parts

[0030] Antioxidant B215 0.3 parts Drip agent SPEL 2.1 parts.

[0031] The main performance indicators of the product in this example:

[0032] Tensile strength (MPa): 28.8 (longitudinal), 28.3 (transverse); Elongation at break (%): 603 (longitudinal), 761 (transverse); Right-angle tear strength (KN / m): 113.1 (longitudinal), Transmittance (%): 89.5; Haze (%): 18.72; Initial drop time (s): 165; Droplet failure time (d): 10.

Embodiment 2

[0034] The composite multi-functional shed film of the present invention is compounded by three-layer film blowing process of inner layer, middle layer and outer layer, wherein the inner layer, middle layer and outer layer film are respectively made of the following raw materials in parts by weight:

[0035] inner layer:

[0036]

[0037] Middle:

[0038]

[0039] Outer layer:

[0040] LLDPE 100 parts LDPE 57.11 parts

[0041] mLLDPE 58.42 parts Light stabilizer 783 1.08 parts

[0042] Antioxidant B215 0.3 parts Drip agent KF95 2.2 parts.

[0043] The main performance indicators of the product in this example:

[0044] Tensile strength (MPa): 29.5 (longitudinal), 28.7 (transverse); Elongation at break (%): 620.1 (longitudinal), 751.3 (transverse); Right-angle tear strength (KN / m): 103.1 (longitudinal), 114.0 (transverse direction); light transmittance (%): 90.0; haze (%): 14.01; first drop time (s): 181;

Embodiment 3

[0046] The composite multi-functional shed film of the present invention is compounded by three-layer film blowing process of inner layer, middle layer and outer layer, wherein the inner layer, middle layer and outer layer film are respectively made of the following raw materials in parts by weight:

[0047] inner layer:

[0048]

[0049] Middle:

[0050]

[0051] Outer layer:

[0052] LLDPE 100 parts LDPE 57.11 parts

[0053] mLLDPE 58.42 parts Light stabilizer 783 1.1 parts

[0054] Antioxidant B215 0.32 parts Drip agent KF96 2.1 parts.

[0055] The main performance indicators of the product in this example:

[0056] Tensile strength (MPa): 30.0 (longitudinal), 27.4 (transverse); Elongation at break (%): 650.1 (longitudinal), 760.2 (transverse); Right-angle tear strength (KN / m): 101.0 (longitudinal), Transmittance (%): 90.0; Haze (%): 14.02; Initial drop time (s): 153; Droplet failure time (d): 15.

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Abstract

The invention relates to an agricultural greenhouse film and a preparation method thereof, in particular to a PE/EVA (Polyurethane/Ethylene Vinyl Acetate) composite multifunctional greenhouse film, which is characterized by being formed by composting an inner layer of thin film, a middle layer of thin film and an outer layer of thin film, wherein a large quantity of EVA resin is added in the inner layer and the middle layer. The invention has the advantages that: by a scientific and reasonable formula design, various functional requirements of the greenhouse film are met, and no production equipment is additionally provided, so that the production cost is reduced. As the composite multifunctional greenhouse film contains higher quantity of EVA resin, compared with the polyolefin resin which has low EVA resin content or has no EVA resin, the greenhouse film has good light transmission property, high transparency, remarkable thermal insulation property and excellent low temperature resistance, longer service life, more excellent physical and mechanical property and compatibility and remarkably-prolonged dripping and fog dispersal lasting time.

Description

technical field [0001] The invention relates to an agricultural shed film and a preparation method thereof, in particular to a high-performance PE / EVA composite multifunctional shed film. Background technique [0002] my country is the country that uses the largest amount of agricultural plastic film in the world. The effect of heat preservation, moisture retention and production increase achieved by the application of plastic film in farmland has been recognized by agricultural production. The raw material for producing agricultural shed film is mainly polyolefin resin, and shed film is mostly used in winter and spring in northern my country. Due to the cold climate, there is a large difference in temperature and humidity inside and outside the greenhouse, resulting in a large number of fog droplets attached to the inner wall of the greenhouse film. Fog droplets refract light, greatly reducing the light transmittance of the film; fog droplets falling on crops will cause th...

Claims

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Application Information

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IPC IPC(8): A01G9/14B32B27/08B32B27/32B32B27/30B32B27/18
CPCY02A40/25
Inventor 巩玉红
Owner ZIBO VOCATIONAL INST
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