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Thermochromic greenhouse film and preparation method thereof

A technology of temperature-sensitive discoloration and greenhouse film, applied in botany equipment and methods, greenhouse cultivation, climate change adaptation, etc., can solve problems such as the inability to reduce the temperature in the greenhouse, and achieve the effect of increasing the effect of sterilization and deodorization

Inactive Publication Date: 2018-05-29
聊城华塑工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to seek a temperature-sensitive color-changing greenhouse film and its preparation method, and to solve the problem that the existing greenhouse film materials can only keep warm and cannot reduce the temperature in the greenhouse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Use a 65 / 90 / 65 three-layer blow molding agricultural film unit to produce 100 square meters of aquaculture greenhouse film with a width of 7 meters and a thickness of 0.08mm, and a thin inner spray coating (the thickness of the thermochromic coating is about 200nm). :

[0020] (1) Effectively disperse 2g of coupling compounding agent, 5g of 10%wt nano-scale titanium dioxide sol in 5g of acrylic acid emulsion, then add 28g of water and 60g of 95% ethanol, and stir for 20min to obtain a uniformly mixed thermochromic solution. The thermochromic solution is poured into a stainless steel bucket for storage;

[0021] (2) The high-pressure pump injects the temperature-sensitive color-changing solution into the rotary splitter of the high-pressure rotary spray device through precise metering, and sprays the high-pressure airless nozzle of the high-pressure rotary spray device in the film bubble, and the formed direct spray droplets are directly attached to the rising...

Embodiment 2

[0024] Use 150 blow molding units to produce 100 square meters of shed film with a width of 8 meters and a thickness of 0.08mm, and a thick inner spray coating (the thickness of the thermochromic coating is 450nm):

[0025] (1) Effectively mix 5g of coupling compounding agent, 10g of nano-scale zinc dioxide sol with a mass fraction of 20wt%, and 5g of acrylic acid emulsion, then add 20g of water and 60g of 95% ethanol, and stir for 20min to obtain a uniformly mixed thermochromic solution , inject the thermochromic solution into a stainless steel barrel and store it for later use;

[0026] (2) Use an ordinary pump to inject the precisely metered thermochromic solution into the rotary splitter, and at the same time use an air compressor with controllable air volume to transport the gas into the rotary splitter, and mix the thermochromic solution and gas in the rotary splitter, Then the air-liquid nozzle is sprayed into the film bubble, and the formed direct spray droplets are di...

Embodiment 3

[0029] Use the single-roll polyethylene film that has already been produced, and dip-coat the antistatic coating on the outer layer to prepare a special greenhouse film for high-clean surface light-effect sterilization and breeding of 100㎡:

[0030] (1) Mix 3g of antistatic agent (B215), 10g of 15%wt nano-scale silica sol and 5g of acrylic acid emulsion, then add 32g of water and 60g of 95% ethanol, and stir for 20min to obtain a uniformly mixed thermochromic solution, Inject the thermochromic solution into a stainless steel bucket for storage;

[0031] (2) Place the polyethylene film whose inner layer has been sprayed on the passive roller, and use the unfolding device to put the polyolefin film into the liquid tank for double-sided immersion treatment to make it generate a self-assembled surface;

[0032] (3) Then the film is introduced into the dryer through the guide roller, and made into a finished product through a winding or folding device. Due to the addition of antis...

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Abstract

The invention discloses a thermochromic greenhouse film. The thermochromic greenhouse film comprises a polyolefin film body and thermochromic coating on the surface of the polyolefin film body, wherein the thermochromic coating is obtained by spraying with a thermochromic solution; the thermochromic solution is obtained by mixing the following raw materials in parts by weight: 5 parts of an acrylic emulsion, 60 parts of ethanol with the concentration of 95%, 5-10 parts of a thermochromic material and 2-5 parts of an additive; the raw materials are supplemented to 100 parts by water; the additive is one or more of a coupling compounding agent, an antioxidant, a photografting aid and an antistatic agent; the thermochromic material is one or more of nanoscale titanium sol with the concentration of 5-20wt%, silica sol with the concentration of 5-20wt% and zinc sol with the concentration of 5-20wt%. The thermochromic greenhouse film is prepared by uniformly spraying the surface of the polyolefin film with the thermochromic solution and drying. The thermochromic greenhouse film effectively filters out light through change of the color so as to adjust the temperature therein.

Description

Technical field: [0001] The invention belongs to the technical field of material preparation, and in particular relates to a greenhouse film capable of adjusting indoor temperature and a preparation method thereof. By coating the surface of an ordinary greenhouse film with a thermochromic solution, the color of the greenhouse film will deepen when the temperature is too high to block strong light. Enter the greenhouse to achieve the purpose of cooling. Background technique: [0002] Polyolefin film is used to make plastic greenhouses and greenhouses to provide crops with a microclimate environment with good temperature, humidity and light quality, thereby improving the yield and quality of crops, such as providing the best growth temperature for vegetables - 15-30°C. However, the general greenhouse film is only suitable for heat preservation in the north, and has no cooling effect. Excessively high temperature will also affect the yield and quality of crops. Invention cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D133/00C09D5/14C09D7/61A01G9/14A01K61/00A01K31/00B05D5/06B05D7/24B05D7/04
CPCA01G9/1438A01K31/002A01K61/00B05D5/065B05D7/04B05D7/24B05D2502/00B05D2601/02C08J7/0427C08J2323/06C08J2323/08C08J2433/00C08K3/36C08K2003/2241C08K2003/2296C08K2201/011Y02A40/25Y02A40/81
Inventor 武庆东郭锋邵月华朱红举陈晓俊
Owner 聊城华塑工业有限公司
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