| 摘要 |
<p>PURPOSE: To provide a film having a matte surface layer including a frictional coefficient particularly applied to a treatment in a packaging unit by forming the matte surface layer substantially of a specific polymer, and incorporating at lest a specific molecular weight in a polyisobutylene. CONSTITUTION: The film comprises a matte surface layer substantially containing a blend of about 10 to 40% of polyisobutylene, 50 to 90% of high density polyethylene and 0 to 40% of propylene homopolymer. The polyisobutylene has a molecular weight of at least 50,000. This film has a frictional coefficient of preferably between about 0.2 and 0.7 or between 0.3 and 0.5. The matte layer has a low glossiness of lower than 10% or preferably 8%. A thickness of the film is preferably about 1.0 to 3.0 mil including a thickness of the matte layer of about 0.1 to 0.3 mil.</p> |
