| 摘要 |
PROBLEM TO BE SOLVED: To provide a stretch film being a non-polyvinyl chloride single-layered stretch film, not torn when stretched by overlap packaging in both of automatic packaging and hand lap packaging and good in other packaging properties. SOLUTION: By forming the stretch film by T-die extrusion molding using a pinning apparatus, even if a film taking-over speed is increased, a draw resonance phenomenon varying the width of the film is suppressed and the tensile stress ratio (TD/MD ratio) in the lateral and longitudinal directions of the film can be brought to a constant level or more. By this constitution, the film hard to generate tearing at the time of overlap packaging is obtained. Further, from a viewpoint of other packaging properties, it is preferable to use a resin composition comprising straight chain low density polyethylene or high-pressure polyethylene with a specific composition. |
