| 摘要 |
Abstract Disclosed is a method of manufacturing a flexible plastic film. This includes forming a length of first primary film by a blown film extrusion process, wherein the first primary film comprises at 5 least a first layer and a second layer; and forming a length of second primary film by a blown film extrusion process, wherein the second primary film comprises at least a first layer and a second layer. The method includes connecting an outer edge of the second layer of the first primary film to an outer edge of the first layer of the second primary film by a substantially continuous heat sealing operation. The result is a secondary film having at least four layers is 0 formed. co - iL |
