| 摘要 |
PROBLEM TO BE SOLVED: To provide a film roll which is good in an anti-blocking property and a sliding property, is free from rumples, and has good processability. SOLUTION: The film roll is made by a polypropylene based resin made by a gas phase method, which forms a substrate layer and a sealing layer, where a haze value is adjusted in a given range. When a coefficient of dynamic friction at 40°C, an amount of an anti-clouding agent existing on the surface of the film and an air-vent index are measured on samples in which 10 of a sample cutting part are formed with an equal regular interval from a starting point to an ending point of winding the film, and about the sample cut from each of cutting part, a mean value of the coefficient of dynamic friction, a rate of variation in the coefficient of dynamic friction, a mean value of the amount of the surface anti-clouding agent, a variation of the amount of the surface anti-clouding agent, a mean value of an air vent index, a variation of the air vent index respectively are regulated to be fallen in a given range. A variation of thickness in the longitudinal direction is regulated to be fallen in a given range. COPYRIGHT: (C)2009,JPO&INPIT |
