| 摘要 |
PURPOSE:To obtain inexpensively a film having a high moisture permeability and a high flexibility, by stretching a sheet comprising a linear low-density polyethylene, an inorganic filler and a specified polybutadiene. CONSTITUTION:This film can be formed by stretching a sheet comprising 100pts. wt. linear low-density polyethylene, 50-300pts.wt. inorganic filler and 5-200pts. wt. polybutadiene of an average-MW >=50,000 and a crystallinity <30% in at least one direction. As said inorganic filler, powdery one having a particle size <=20mum is desirable. The stretch ratio is preferably about 120-500%, and the thickness of the moisture-permeable film is preferably about 10-100mum. |
