| 摘要 |
<p>PURPOSE:To stabilize the sealing conditions of the heat-adhesive parts of a paper container, by providing an air vent hole, at least reaching the base board, at the outermost resin layer constituting the heat-adhesive part. CONSTITUTION:A paper container is provided with a packing material 7 composed of inner film 2 made of polyethylene resin, drawn plastic film 3 made of drawn polyester resin, adhesive 4, base paper 5, superficial layer 6 made of polyolefin resin as a layer structure of this order from the inside of container. A plurality of air vent slit holes 10 reaching the base paper on the superficial resin layer 6 of the sticking area as the external side at the side seal 8. The air vent holes are provided earlier than the side seal is applied. The steam generated from the base paper 5 due to the side seal heat when applying the side seal, is removed outward through the air vent holes 10. And hence, that prevents the inner film 2 from separating from the base paper 5.</p> |
