| 摘要 |
PURPOSE:To prepare a resin composition giving an oriented product, especially a biaxially oriented film which can be made antistatic by the use of only a small amount of antistatic agent, by compounding a polypropylene resin containing an antistatic agent with a specific crystalline wax. CONSTITUTION:The objective composition is prepared by compounding (A) 100 parts by weight of an isotactic polypropylene pref. having heptane extraction residue of >=95% and a melt flow index of 0.1-5.0g/10min, (B) 0.5-5.0, pref. 1.3-3.0 parts of crystalline wax composed of 45-60C saturated straight-chain hydrocarbons synthesized by Fischer-Torpsch process, and (C) 0.1-2.0 parts of an antistatic agent. The antistatic agent migrates to the wax in the course of forming the undrawn film, and the wax migrates to the surface of the oriented product during drawing, thereby forming a wax layer containing the antistatic agent in relatively high concentration and giving sufficiently high antistatic effect to the film. |
