Patent ID: 11858191
Assignee: KUHNE ANLAGENBAU GMBH
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 3:
4. The method according to claim 1, wherein the thermoplastic resin of the first layer has a melting temperature of more than 170° C.; and/or
the thermoplastic resin of the third layer is a polyolefin having a sealing temperature lower than the sealing temperature of the thermoplastic resin of the first layer; and/or
the thermoplastic resin of the third layer is a polyolefin having a melting temperature of less than 120° C.; and/or
the thermoplastic resin of the second layer has an oxygen permeability of less than 100 cm3/m2·d·bar or the thermoplastic resins of the plurality of the second layers each or in total have an oxygen permeability of less than 100 cm3/m2·d·bar; and/or
the second layer has an oxygen permeability of less than 100 cm3/m2·d·bar or the plurality of the second layers each or in total have an oxygen permeability of less than 100 cm3/m2·d·bar; and/or
the stretching is carried out simultaneously or successively in several stages; and/or
the composite film after stretching and relaxation has a shrinkage of less than 0.05 in the machine direction (MD); and/or
the composite film after stretching and relaxation has a shrinkage of less than 0.05 in the transversal direction (TD); and/or
the composite film after stretching and relaxation preferably has a sum of the shrinkage in the machine direction and the shrinkage in the transversal direction of less than 0.05.