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Preparation method of light regulation function conversion film for greenhouse

A light-adjusting conversion and functional film technology, applied in the field of agricultural production, can solve the problems of affecting plant growth rate, high red light transmittance of film, poor plant photosynthesis, etc. The effect of excellent energy storage performance

Inactive Publication Date: 2019-02-12
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a light-adjustable conversion functional film for greenhouses in order to overcome the defects of the above-mentioned prior art, which solves the problem that the red light transmittance of the current agricultural greenhouse film is too fast and the temperature rise in the greenhouse is too fast. It affects the growth rate of plants, and at the same time, the heat preservation is poor at night, and the heat source outside the greenhouse needs to be kept warm, and the photosynthesis of plants at night is poor, etc.

Method used

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  • Preparation method of light regulation function conversion film for greenhouse
  • Preparation method of light regulation function conversion film for greenhouse
  • Preparation method of light regulation function conversion film for greenhouse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The thickness of the agricultural film with dimming conversion function for greenhouses is 0.1mm, the infrared light filtering rate is 90%, the energy conversion rate from infrared light to visible light is 80%, the visible light transmittance rate is 80%, and the light storage performance is 10 minutes of natural light radiation. The light intensity is 3000mcd / m 2 , After 10 hours, the light intensity is reduced to 45% of the original, the energy storage performance energy storage transition temperature is 15-35°C, and the dimming conversion performance is from yellow to purple when it is lower than 15°C, and from yellow to infrared when it is higher than 35°C , It is yellow between 15°C and 35°C.

[0035] The agricultural film with dimming conversion function for greenhouses contains resin, energy storage and dimming materials, anti-aging agents, plasticizers, and other additives; the preferred resin is one of polyethylene, polypropylene, and polyvinyl chloride, and t...

Embodiment 2

[0052] The thickness of the agricultural film with dimming conversion function for greenhouses is 1.5mm, the infrared light filtering rate is 75%, the energy conversion rate from infrared light to visible light is 50%, the visible light transmittance is 70%, and the light storage performance is natural light radiation for 10 minutes The light intensity is 3000mcd / m 2 , After 10 hours, the light intensity is reduced to 45% of the original, the energy storage performance energy storage transition temperature is 15-35°C, and the dimming conversion performance is from yellow to purple when it is lower than 15°C, and from yellow to infrared when it is higher than 35°C , It is yellow between 15°C and 35°C.

[0053] The agricultural film with dimming conversion function for greenhouses includes resin, energy storage and dimming material, anti-aging agent, plasticizer, and other additives; the preferred resin is one of polyethylene, polypropylene, and polyvinyl chloride. The preferre...

Embodiment 3

[0070] The thickness of the agricultural film with dimming conversion function for greenhouses is 1.0mm, the infrared light filtering rate is 80%, the energy conversion rate from infrared light to visible light is 80%, the visible light transmittance is 80%, and the light storage performance is natural light radiation for 10 minutes The light intensity is 3000~50000mcd / m 2 , After 10 hours, the light intensity is reduced to 60% of the original, the energy storage performance energy storage transition temperature is 15-35°C, and the dimming conversion performance is from yellow to purple when it is lower than 15°C, and from yellow to infrared when it is higher than 35°C , It is yellow between 15°C and 35°C.

[0071] The agricultural film with dimming conversion function for greenhouses contains resin, energy storage and dimming materials, anti-aging agents, plasticizers, and other additives; the preferred resin is one of polyethylene, polypropylene, and polyvinyl chloride, and ...

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Abstract

The invention relates to a preparation method of a light regulation function conversion film for a greenhouse. An energy storage light regulation material is prepared by prepared upper conversion fluorescence light storage function powder bodies; then, a fusion extrusion film blowing method is used; resin, energy storage light regulation materials and processing auxiliary agents are used as raw materials to prepare the light regulation function conversion film through film blowing by a double-screw extruding machine. Compared with the prior art, the preparation method has the advantages that the red light utilization rate is great; the energy storage performance is excellent; the night fluoresce emission effect is achieved; wide application prospects are realized in the fields of agricultural mulching films, greenhouse heat insulation films and the like.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to a preparation method of a light-adjusting conversion functional film for greenhouses. Background technique [0002] my country's facility agriculture has become the largest solar energy utilization project in the world, and its technical level is getting closer and closer to the world's advanced level. The development of facility agriculture has greatly alleviated the contradiction of my country's large population and small land. Among them, the greenhouse plastic film is to promote the growth of crops and increase production. and the key to increasing income. However, at present, the low light utilization rate of crops in greenhouses and overheating of greenhouses seriously restrict the further development of protected agriculture. Especially after sunlight passes through the greenhouse film, the proportion of infrared light increases while the proportion of visib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L27/06C08K3/30C08K3/22C08K3/16C08K5/10C08K5/06C08K13/02C08J5/18A01G9/14
CPCA01G9/1407A01G9/1438C08J5/18C08J2323/06C08J2323/12C08J2327/06C08K3/16C08K3/22C08K3/30C08K5/06C08K5/10C08K13/02Y02A40/25
Inventor 饶品华张延风王润锴严丽丽江振林陆杰张文启王锦成孙彦刚
Owner SHANGHAI UNIV OF ENG SCI
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