| 摘要 |
A double-walled paper container produced by placing a preformed paper container in a shaping die set cavity of a vacuum draw shaping apparatus, positioning a single piece of synthetic resin film or sheet on the top of said paper container, holding the film at the peripheral edge thereof, heating the film to make the plastic film, stretching the film and applying negative pressure to the film to line said preformed paper container with the film is in water-tight fashion and wherein the lined paper container has a good shape holding ability and is hygienic for the user thereof. |
