초록 ▼

The invention relates to a laminated material which comprises a carrier layer of paper or cardboard and an outside layer of extruded polythene applied to one side of the carrier layer. To the other side of the carrier layer is applied a first binder layer of polythene and a layer of aluminum foil pl

The invention relates to a laminated material which comprises a carrier layer of paper or cardboard and an outside layer of extruded polythene applied to one side of the carrier layer. To the other side of the carrier layer is applied a first binder layer of polythene and a layer of aluminum foil placed against the binder layer. A second binder layer of EAA is provided for the bonding together of the aluminum foil with an inner polythene layer which has been produced by blowing and which has a substantially higher modulus of elasticity and strength than the slot-extruded polythene layer. The invention also relates to a method for the manufacture of the laminate by making use of the heat content of the first slot-extruded binder layer of polythene for heating up the second binder layer of EAA to such a temperature that an effective bonding on the aluminum foil is obtained.

대표청구항 ▼

A method of forming a packing web, comprising the steps of: providing a first laminate including a thermoplastic film and a first binder layer, said first binder layer having a softening temperature; providing a second laminate including a carrier layer; interposing a layer of metallic foil between

A method of forming a packing web, comprising the steps of: providing a first laminate including a thermoplastic film and a first binder layer, said first binder layer having a softening temperature; providing a second laminate including a carrier layer; interposing a layer of metallic foil between said first binder layer and said carrier layer while extruding a second binder layer of thermoplastic material in a heated condition between said layer of aluminum foil and said carrier layer to form an intermediate web; bonding said first and second laminates with said layer of metallic foil by compressing said intermediate web while conducting heat from said second binder layer to said first binder layer through said metallic foil to raise said first binder layer to at least said softening temperature.