| 摘要 |
A laminated structure for use in barrier packaging, the structure comprising a first layer 1 providing oxygen barrier properties and at least one second layer 3 providing moisture barrier properties, wherein the first layer has an oxygen permeability of no more than 5 cm3/m2/day and a tensile stiffness in the machine direction of greater than about 2800 MPa, and the second layer has a water vapour transmission rate of no more than 10 g/m2/day. The preferred materials are cellulose or cellulose derivatives for the first layer and a polyolefin (e.g polyethylene, PE, LDPE, polypropylene, PP, or polybutylene, PB), most preferably LLDPE. The laminate may be formed from biodegradable and/or renewable and/or reclaimed material. The second layer may be a heat-sealable layer. The laminate may comprise a tie layer 2 between the first and the second layer, e.g. a maleic anhydride-substituted polyolefin. The laminate may be used in a barrier packaging of a tube-shaped container. Further layers may be added such as ink 4 and lacquer layers 5. The laminate is formed by extruding, co-extruding or laminating the first layer with the second layer. |
