| 摘要 |
PURPOSE:To obtain a porous film or sheet good in longitudinal and lateral strength balance and tear strength and free from stretching irregularity by combining a specific amt. of a polybutylene resin with a polyethylene resin. CONSTITUTION:A porous film or sheet is formed from a resin compsn. consisting of 99-20 pts.wt. of a polyethylene resin (a), 1-80 pts.wt. of a polybutene resin (b), 100-400 pts.wt. of a filler with respect to 100 pts.wt. of the sum total amt. of the resins (a), (b) and 1-100 pts.wt. of a plasticizer with respect to 100 pts.wt. of the sum total amt. of the resins (a), (b). The density of the polyethylene resin is 0.910-0.965g/cm<3> and the melt index thereof is 20g/10min or less and the density of the polybutene resin is 0.93g/cm<3> or less. |
