| 摘要 |
PROBLEM TO BE SOLVED: To provide a covering material which is used for protected horticulture, has an excellent antifogging property, and scarcely deteriorates the antifogging property for a long period, even when opening and closing works comprising the winding and unwinding of the covering material are repeated for ventilation, heat insulation, soil control by the feeding of rain water, and by the utilization of the differences of temperatures, for the coloration promotion, the sugar contents improvement and dormancy breaking. SOLUTION: This covering material is obtained by forming an antifogging coating film on the uneven surface of a thermoplastic resin film having a specific uneven shape, is used for winding and unwinding works, because the antifogging coating film is protected by the uneven shape. |
