| 摘要 |
PURPOSE:To produce a wrap film that is excellent in adhesion, is transparent, and is free from any additive, by bringing a filmy item in contact with a cooling roller, and blowing air uniformly onto the item by an air knife so that the film surface is made smooth. CONSTITUTION:A polyethylene having a density of 0.926-0.935g/cm<3> that is obtained by the high-pressure polymerization process is used as a raw material. The polyethylene to which an antioxidant and an anti-fogging agent are not added is extruded from a T-die into a film. The film extruded from the T-die is brought in contact with a cooling roll and air is blown to the film from an air knife to make the film surface smooth. |
