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A kind of astigmatism cooling thermal radiation control film and preparation method

A technology of thermal radiation and astigmatism, applied in the agricultural field, can solve the problems of low reflectivity, bright white and bright white and bright pollution, and can not fully meet the needs of agricultural production.

Active Publication Date: 2017-08-25
SHANDONG WEIFANG ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although reflective films and sunshade nets are widely used in the agricultural field, they cannot meet the needs of modern agricultural production due to their technical and structural factors.
One is that the reflective film reflects light in a large area in agriculture, which will form bright and dazzling white pollution
The second is that the sunshade net has a limited sun-shading effect and cannot fully meet the requirements of agricultural production.
The third is that the reflective film has a large light loss, low reflectivity, and no thermal radiation emission capability; the sunshade net absorbs sunlight to generate a large amount of heat energy, which increases the temperature of the air around the net, and the far infrared rays generated will emit heat radiation in both directions, indirectly increasing the temperature of the facility
The cooling effect of the two is not significant
[0011] The existing technology has the following defects: (1) the covering effect is poor, and the covering rate of sunlight is low; (2) the metal film is prone to light pollution and heavy metal pollution; (3) the cooling and heat insulation effects are not good; (4) the function is single, Shading, heat insulation, cooling and heat resistance cannot be achieved at the same time

Method used

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  • A kind of astigmatism cooling thermal radiation control film and preparation method
  • A kind of astigmatism cooling thermal radiation control film and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Example 1 A kind of astigmatism cooling thermal radiation control film

[0068]The astigmatism cooling thermal radiation control film mainly contains broad-spectrum light-transmitting, low-refractive-index film-forming resin material, high-refractive-index micropowder material, far-infrared ray micropowder material, and trace light-absorbing micropowder material.

[0069] (1) The broad-spectrum light-transmitting, low-refractive-index film-forming resin material:

[0070] The film-forming resin can be selected from PVC, HDPE, LDPE, LLDPE and other resins. Low-density polyethylene (LDPE) is preferred, with a density of 0.915-0.940g / cm 3 Among them, the refractive index is 1.51, and the far-infrared transmittance in the 7.0~13.0μm band is high, which is similar to the far-infrared light-transmitting body.

[0071] (2) The high refractive index micropowder material:

[0072] Rutile titanium dioxide (refractive index 2.73), anatase titanium dioxide (refractive index 2.55...

Embodiment 2

[0089] Example 2 Formula of astigmatism cooling thermal radiation regulation film

[0090] Raw material formula of astigmatism cooling thermal radiation regulation film:

[0091] Recipe one:

[0092] The ratio of raw materials by weight of the astigmatism cooling thermal radiation regulation film is:

[0093] Rutile titanium dioxide 426 parts

[0094] LDPE 320 parts

[0095] LLDPE 183 parts

[0096] TPU 9 parts

[0097] Oleamide 13 parts

[0098] PE wax 27 parts

[0099] Far-infrared ceramic powder 20 parts

[0100] Carbon black 2 parts

[0101] Recipe 2:

[0102] The ratio of raw materials by weight of the astigmatism cooling thermal radiation regulation film is:

[0103] LDPE 31 parts

[0104] LLDPE 13 parts

[0105] EVA 7 parts

[0106] TPU 0.8 parts

[0107] 42 parts of rutile titanium dioxide

[0108] PE wax 2.7 parts

[0109] Oleic acid amide 1.3 parts

[0110] Far-infrared ceramic powder 1.9 parts

[0111] Carbon black 0.3 parts

[0112] Recipe three:...

Embodiment 3

[0133] Example 3 A preparation method of astigmatism cooling thermal radiation regulation film

[0134] Step 1. Raw material preparation

[0135] (1) Far-infrared ceramic powder and carbon black are selected from commercial color masterbatches, weighed according to the raw material formula of the astigmatism cooling heat radiation control film and the active ingredients of the two kinds of color masterbatches, and set aside.

[0136] (2) Weigh other raw materials according to the raw material formula of the astigmatism cooling thermal radiation control film, and set aside.

[0137] Step 2. Prepare masterbatch

[0138] Add the raw materials other than the far-infrared ceramic powder and carbon black weighed in step 1 into the single-screw extruder for melting and plasticization, and the materials extruded from the die of the machine head are shaped, cooled, drawn, and cut to obtain Light scattering layer masterbatch;

[0139] The helix angle of the single-screw extruder is 1...

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Abstract

The invention discloses a light-scattering, cooling and thermal-radiation regulating membrane. The regulating membrane comprises raw materials as follows: a film-forming resin material, a far-infrared micropowder material, a trace light-absorbing micropowder material and a high-refraction-index micropowder material, wherein the thickness of the regulating membrane is 80-150 mu m; the film-forming resin material is LDPE (low-density polyethylene), the high-refraction-index micropowder material is rutile type titanium dioxide, the far-infrared micropowder material is far-infrared ceramic micropowder, and the trace light-absorbing micropowder material is carbon black. With the adoption of the prepared light-scattering, cooling and thermal-radiation regulating membrane, the shading rate of sunlight can be up to 99%, and when agricultural facilities are covered, surface temperatures of the agricultural facilities are 17-25 DEG C lower than those of facilities not covered with the membrane.

Description

technical field [0001] The invention relates to an astigmatism cooling thermal radiation regulating film and a preparation method thereof, belonging to the technical field of agriculture. [0002] The astigmatism cooling thermal radiation control film mainly contains broad-spectrum light-transmitting, low-refractive-index film-forming resin materials, high-refractive-index micropowder materials, far-infrared micropowder materials, and trace light-absorbing micropowder materials. [0003] Astigmatism cooling thermal radiation control film is suitable for agricultural production in dark environments such as edible fungi and white asparagus in spring, summer, summer and autumn high temperature seasons, softening cultivation of garlic, leeks, celery and other vegetables, temperature control of animal husbandry facilities, and early or delayed dormancy adjustment of fruit trees. Temperature and other facility agriculture. Background technique [0004] In the 1950s, countries suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08L75/04C08L27/06C08K13/02C08K3/22C08K5/20C08K3/04
CPCC08J5/18C08J2323/06C08J2423/08C08L23/06C08L2203/16C08L2205/02C08L2205/025C08L2205/035C08L2207/066C08L23/0815C08L75/04C08K13/02C08K2003/2241C08K5/20C08K3/04
Inventor 魏永阳
Owner SHANDONG WEIFANG ACADEMY OF AGRICULTURAL SCIENCES