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Heat insulation material for agriculture and horticultural facility

A thermal insulation material, agricultural and horticultural technology, applied in horticulture, agriculture, application, etc., can solve problems such as low weather resistance, decreased light transmittance, and poor thermal insulation effect

Inactive Publication Date: 2005-08-03
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the pigment or copper proposed in the above-mentioned gazette has low weather resistance and is prone to aging due to ultraviolet rays or heat, so when it is contained in a resin and used as a heat insulating material, if it is exposed outdoors for a long time, there is a heat insulating effect. The problem of early variation
In addition, when pigment is contained, it is easy to spread
The surface of the resin is whitened, which has the disadvantage of extremely reducing the light transmittance
Therefore, it is difficult to use resin films containing pigments or copper ions for a long time, especially as materials for agricultural and gardening facilities.

Method used

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  • Heat insulation material for agriculture and horticultural facility
  • Heat insulation material for agriculture and horticultural facility
  • Heat insulation material for agriculture and horticultural facility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] LaB 6 Microparticles (specific surface area 30m 2 / g) 20 parts by weight, 75 parts by weight of toluene, and 5 parts by weight of a dispersant were mixed, and after dispersion treatment, a dispersion liquid A having an average dispersed particle diameter of 80 nm was obtained. The solvent component was removed from this dispersion liquid A using a vacuum dryer at 50°C, and the dispersion-treated LaB 6 Powder A. In addition, the average dispersed particle diameter was measured with the dynamic light scattering method measuring apparatus (Otsuka Electronics Co., Ltd. (manufactured) ELS-800), and the average value was taken.

[0049] Dry mix the LaB with a V-blender 6 0.01 kg of powder A and 8.7 kg of ETFE (tetrafluoroethylene-ethylene copolymer) resin. Then, the mixture was sufficiently airtight mixed at 320° C. near the melting temperature of the ETFE resin, and the mixture was extruded at 320° C. to form a film with a thickness of about 50 μm. LaB in the film 6 Th...

Embodiment 2

[0055] With the LaB in embodiment 1 6 0.005kg of powder A and 8.7kg of PTFE resin were dry-mixed with a V-type mixer. Then, in the same manner as in Example 1, the mixture was sufficiently airtight mixed at 320° C. near the melting temperature of the ETFE resin, and the mixture was extruded at 320° C. to form a film with a thickness of about 50 μm. LaB in the film 6 The content of fine particles is equivalent to 0.05g / m 2 .

[0056] The obtained film-shaped heat insulating material was evaluated in the same manner as in Example 1. The visible light transmittance was 80% and the solar radiation transmittance was 65%. It blocks 35% of the direct incident light of the sun's rays and has a high thermal insulation effect. In addition, the transmittance in the ultraviolet region is 34% at a wavelength of 290nm and 43% at a wavelength of 320nm. This is the range in which bees etc. can have sufficient pollination activity. Furthermore, the base value is 4.1%, and the transparenc...

Embodiment 3

[0058] Except that PET (polyethylene terephthalate) resin was used instead of ETFE resin in Example 2, and the heating temperature was increased to the temperature at which PET was fully softened (about 300°C), the film was produced in the same way as in Example 2. . LaB in the film 6 The content of microparticles is the same as in Example 2, which is equivalent to 0.05g / m 2 .

[0059] The obtained film-shaped heat insulating material was evaluated in the same manner as in Example 1. The visible light transmittance was 79% and the sunlight transmittance was 65%. It blocks 35% of the direct incident light of the sun's rays and has a high thermal insulation effect. In addition, the transmittance in the ultraviolet region is 0% at a wavelength of 290nm and 35% at a wavelength of 320nm, and 0% at a wavelength of 290nm is due to the influence of PET resin as a resin base material. Furthermore, the base value is 2.5%, and the transparency is very high.

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Abstract

A heat insulation material for agricultural and horticultural facility having a heat insulation layer formed of a resin base material containing particulate heat insulation fillers diffused therein. The heat insulation fillers are formed of a material selected from a group consisting of lanthanum hexaboride and antimony-added tin oxide. This heat insulation material for agricultural and horticultural facility has as the insulation index the solar transmittance of 10-80%, the visible light transmittance of 30-90%, and the light transmittance in the ultraviolet ray range of 5-80% at wavelength of 320 nm and 0-70% at wavelength of 290 nm.

Description

technical field [0001] The present invention relates to a film-shaped or plate-shaped material used for roofing and outer wall materials of greenhouses for agriculture and gardening, and particularly relates to a heat insulating material for agricultural and gardening facilities having a heat insulating effect. Background technique [0002] Conventionally, agricultural and horticultural facilities, mainly greenhouses for agriculture and horticulture, generally use resin films or resin boards as roof or outer wall materials. Typical materials include vinyl chloride resins, polyethylene resins, polyester resins, and fluororesins. Recently, fluororesins that are excellent in weather resistance and light transmission in the ultraviolet range have also attracted attention. [0003] Most of the materials used for the roof and outer wall materials of these agricultural and gardening facilities are designed for thermal insulation. However, the purpose of heat preservation can be la...

Claims

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Application Information

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IPC IPC(8): A01G13/02A01G9/14B32B27/18C08J5/18C08K3/38C08K9/02C08L101/00
CPCA01G9/1438Y02A40/25
Inventor 武田广充
Owner SUMITOMO METAL MINING CO LTD
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