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1. (WO2017150165) GREENHOUSE, PLANT CULTIVATION METHOD USING SAID GREENHOUSE, AND HEAT-RAY REFLECTING FILM STRUCTURE

Pub. No.:    WO/2017/150165    International Application No.:    PCT/JP2017/005192
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Feb 14 00:59:59 CET 2017
IPC: A01G 9/14
A01G 9/18
A01G 9/22
A01G 9/24
Applicants: TEIJIN FILM SOLUTIONS LIMITED
帝人フィルムソリューション株式会社
Inventors: OKUMURA, Hisao
奥村 久雄
KOBAYASHI, Yutaka
小林 豊
Title: GREENHOUSE, PLANT CULTIVATION METHOD USING SAID GREENHOUSE, AND HEAT-RAY REFLECTING FILM STRUCTURE
Abstract:
According to this greenhouse and this plant cultivation method using said greenhouse, in the interior of the greenhouse, at least a CO2 supplying means for supplying carbon dioxide, a heat-ray shielding means, and a dehumidifying/cooling means for cooling the greenhouse interior are provided. The heat-ray shielding means is formed using a heat-ray reflecting film having an average transmittance of 80% or more for light in the wavelength range of 400-700 nm, and an average reflectance of 70% or more for light in the wavelength range of 800-1200 nm. A plurality of through-holes are formed in the heat-ray shielding means with a predetermined spacing therebetween. Therefore, the amount of energy input per harvested amount of plants is decreased, and it is thus possible to economically and efficiently cultivate plants. Since it is possible to decrease the amount of water supplied to plants, plants can be cultivated even in an arid region or the like, and a decrease in quality such as discoloration and deterioration due to condensation can be prevented. In addition, this heat-ray reflecting film structure is formed from a woven fabric that is organized in a woven manner using, as warps or wefts, narrow strip-like tapes obtained by cutting a raw film and using filament threads or spun threads as the wefts or the warps, wherein, in the raw film, a lubricating layer is provided at least on one surface of a multilayer laminated film that is obtained by alternately laminating at least two types of resin layers with different refractive indexes and that has an average transmittance of 80% or more for visible light (light in the wavelength range of 400-750 nm), and an average reflectance of 70% or more for heat rays (light in the wavelength range of 800-1100 nm). The thickness of the filament threads or the spun threads is 0.01-0.30 times the width of the narrow strip-like tapes, and the spacing between adjacent narrow strip-like tapes is 0.1-0.5 times the width of the narrow strip-like tapes. With this structure, it is possible to economically and efficiently cultivate plants in a greenhouse utilizing sunlight.