| 摘要 |
PROBLEM TO BE SOLVED: To provide a greenhouse-covering material for agriculture, having excellent effects of preventing useless pest insects from invading, insulating the inside when it is cold, and preventing rain water caused by wind and rain from invading, and having sufficiently kept air-permeability and moisture permeability. SOLUTION: The greenhouse-covering material comprises a film formed of a thermoplastic resin, and has≤30% total light transmittance. The film has micropores formed of a three-dimensional net structure comprising stem fibrils extending in one direction and branch fibrils connecting the stem fibrils, regulated so that the formed density of the branch fibrils may be higher than that of the stem fibrils. COPYRIGHT: (C)2004,JPO |
