| 摘要 |
<p>Resealable packaging sheet with a weldable sheet comprising a welding film and a gas barrier film which is e.g. a copolyester. Laminated packaging sheet (14) which is resealable and comprises a support film (24) next to a welded film (26) between which is interposed in at least one of the zones, a layer (28) of a permanent adhesive attached to the film support (24) and the welded film (26), characterized in that the welded film (26) has a welding layer (36) and at least one gas barrier layer (37), where at least one of the barrier layers is a composition selected from vinyl alcohol/ethylene copolymer, polyvinylidene chloride, polyvinyl alcohol, silica, aluminum oxide, polyester and copolyester. An INDEPENDENT claim is included for packaging (10) especially a sachet type, with an external wall (16) defining an opening (15) characterised in that the opening is closed by laminated sheet (14) such that it welds to the external wall (16) at the periphery of the opening (15) by means of the weldable film (26) in a part of the sheet which is filled with a permanent adhesive (28).</p> |
