| 摘要 |
PROBLEM TO BE SOLVED: To provide an unstretched polypropylene film which has an excellent whitening resistance and highly balanced physical properties in practical use, such as heat sealability, slipperiness, and antiblocking properties. SOLUTION: This film, substantially unstretched, is prepared from a resin composition containing a polypropylene resin and a lubricant. The differenceΔH between the haze just after film formation and that after conditioning at 40 deg.C for 7 days, the amount C of the lubricant contained, and the film thickness D satisfy the relation represented by a specific equation. The film has a blocking strength of 400 g/10 cm<2> or lower and can be heat sealed at a temperature lower than 130 deg.C.
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