| 摘要 |
The present invention refers to a multi-layered material for making adequate packagings to bottle dry materials, which shows a protection to the upper dampness avoiding the migration of the fatty compounds through a barrier layer of ethylene/vinyl alcohol copolymer. This migration also provokes stains and a poor esthetic as well as hinders the packaging container force. The multi-layered material of the present invention is glued to convert it into a packaging container, but not in a most common way, which is by heat-sealing. In order to achieve this objective, the ethylene/vinyl alcohol copolymer layer (EVOH) is sandwiched between two cardboard or paper layers. In this way the cardboard or paper layers of this multi-layered material, constitute the exterior layers. When transforming said multi-layered material into a packaging container, starting from a single sheet the lower part of said container, made of cardboard or paper, can now be glued to the exterior part of said container, also made of cardboard or paper. The present invention therefore does not need, more sophisticated assembling techniques, such as heat-sealing to elaborate a cardboard packaging. |
