| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet for preventing high-temperature injury to crops having a high transmittance of visible rays to block heat rays so as to prevent high-temperature injury to crops without spoiling the growth of the crops. SOLUTION: The sheet for preventing high-temperature injury to crops is formed so that thermoplastic resin uniaxial drawing yarns vertically and horizontally cross one another, and comprises a cloth-like body having a porosity of 5-80% shown in the following formula: porosity (%)=[(A×B)/(25.4×25.4)]×100, wherein A=25.4-(the number of warp (/25.4mm)×tape width (mm)), and B=25.4-(the number of weft (/25.4mm)×tape width (mm)). The uniaxial drawing yarns respectively contain inorganic powder having small shielding power against visible rays each with a wavelength of 400-780 nm and large shielding power against near-infrared rays each with a wavelength of 780-2,000 nm. COPYRIGHT: (C)2006,JPO&NCIPI
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