Infrared absorption heat preservation film

A technology of infrared absorption and thermal insulation film, applied in the direction of plant protection cover, synthetic resin layered products, layered products, etc., can solve the problems of unfavorable crop growth, temperature drop, etc., achieve good absorption and reflection ability, reduce the ratio, and reduce production cost effect

Inactive Publication Date: 2012-10-31
上海普拉斯克塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at night or when there is no sunlight, when the temperature difference between day and night is large, the temperature in the shed will drop a lot due to heat loss, which is not conducive to the growth of crops.

Method used

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  • Infrared absorption heat preservation film

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Experimental program
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Effect test

preparation example Construction

[0024] The preparation method of the infrared absorption thermal insulation film is as follows: various resins such as EVA, PE and related functional masterbatches such as anti-infrared masterbatches, dripping anti-fogging agents, anti-aging agents and other related masterbatches are put into the warehouse and automatically batched. Among them, the infrared absorbing heat preservation agent is added in the form of an anti-infrared masterbatch using LDPE or LLDPE as a carrier, and the mass ratio of the infrared absorbing heat preservation agent in LDPE or LLDPE is 40-60%; it is weighed and sent into a three-layer co-extrusion The screw of the film blowing equipment is mixed and extruded to be plasticized into a melt; the filter is filtered, and then diverted to the die head through the flow channel, and extruded to form a composite film; the extruded film is then blown, drawn, folded, and rolled to form Finished insulation film.

[0025] The preparation of the thermal insulatio...

Embodiment 1

[0028] An infrared absorbing thermal insulation film with a three-layer co-extruded composite film structure comprising an inner layer, a middle layer and an outer layer. Among them, the outer layer material is PE with 12% anti-aging agent and 3% slow-release agent, and the middle layer material is added with 8% infrared absorbing heat preservation agent, 12% anti-aging agent, 10% dripping anti-fogging agent, 3% The PE and EVA of the slow release agent, the inner layer is made of PE with 12% anti-aging agent, 10% dripping anti-fogging agent, and 3% slow release agent. In the middle layer, EVA and PE are used in a weight ratio of 1:2.

[0029] Among them, the infrared absorbing thermal insulation agent is a masterbatch formed by plasticizing one or more of calcium carbonate, diatomite, and talcum powder with LDPE as the carrier. The weight ratio of calcium carbonate, diatomite, and talcum powder is 75:20:5; and the mass ratio of the infrared absorbing thermal insulation agent ...

Embodiment 2

[0033] An infrared absorbing thermal insulation film with a three-layer co-extruded composite film structure comprising an inner layer, a middle layer and an outer layer. Among them, the outer layer material is PE with 10% anti-aging agent, 2% slow-release agent, and 1% opening agent, and the middle layer material is added with 4% infrared absorbing heat preservation agent, 10% anti-aging agent, and 10% dripping anti-aging agent. Fog agent, EVA with 5% heat preservation agent, the inner layer is made of EVA and PE with 10% anti-aging agent, 10% dripping anti-fogging agent, 2% slow-release agent, and 1% opening agent. In the inner layer, the weight ratio of EVA and PE is 1:2.2.

[0034] Among them, the infrared absorbing heat preservation agent is a masterbatch formed by mixing and plasticizing one or more of calcium carbonate, hydrotalcite, and diatomite with LLDPE as the carrier. The weight ratio of calcium carbonate, hydrotalcite, and diatomite added is It is 70:20:10; and ...

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Abstract

The invention discloses an infrared absorption heat preservation function film which is in an integrated thin film structure which is formed by three layers including an outer layer, a middle layer and an inner layer in a co-extruding and compounding way; and an infrared absorption material is introduced into the middle layer of the thin film when the polyethylene thin film is machined, so that a formed thin film can effectively absorb and reflex infrared light, and therefore, the loss of heat energy in a greenhouse and the quick reduction of the greenhouse temperature due to the infrared heat energy radiation can be effectively avoided, and the aim of the heat preservation of the greenhouse can be realized. Meanwhile, the infrared absorption material added into the heat preservation film has a certain scattering effect, and certain incident light generates the diffusion after passing through the heat preservation thin film disclosed by the invention, so that the 'shadow' problem in the greenhouse can be solved, crops in the greenhouse can obtain even photosynthesis, and the balance growth of the crops can be promoted. Compared with the conventional greenhouse thin film, the infrared absorption heat preservation function film disclosed by the invention can greatly reduce the production cost.

Description

technical field [0001] The invention relates to a film, in particular to an infrared absorbing heat preservation film. The invention belongs to the technical field of agricultural film preparation. Background technique [0002] my country's functional agricultural film was developed on the basis of ordinary greenhouse film in the late 1970s. At present, most of the films used in agricultural thermal insulation greenhouses are multi-layer plastic films, because the plastic film has a good thermal insulation effect, and the film is filled with heat-insulating air, even in the cold season, due to the heating effect of sunlight during the day , The film shed can also maintain a high temperature, which is conducive to the growth of crops. But at night or when there is no sunlight, when the temperature difference between day and night is large, the temperature in the shed will drop a lot due to heat loss, which is not conducive to the growth of crops. [0003] Since the loss of...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/18A01G13/02
Inventor 杨炳文江涛朱平沈燕
Owner 上海普拉斯克塑料有限公司
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