초록 ▼

The present invention relates to a stock material and a process for producing such stock material. The stock material comprises a first outer layer of polyamide resin, a second outer layer of polyolefin resin and a tie layer therebetween which comprises a copolymer of ethylene and maleic anhydride,

The present invention relates to a stock material and a process for producing such stock material. The stock material comprises a first outer layer of polyamide resin, a second outer layer of polyolefin resin and a tie layer therebetween which comprises a copolymer of ethylene and maleic anhydride, a polyamide resin and a polyolefin resin. The process of the invention comprises the steps of providing a particulate material having a layer of polyamide resin, a layer of polyolefin resin and a layer therebetween comprising a copolymer of ethylene and maleic anhydride; admixing the particulate material with a copolymer of ethylene and maleic anhydride to produce a tie layer composition; and coextruding a tie layer of the tie layer composition between and in contact with a first outer layer of polyamide resin and a second outer layer of polyolefin resin.

대표청구항 ▼

A stock material of indefinite running length, said stock material comprising: A. a first layer of polyamide resin; and B. a second layer of polyolefin resin; and C. a tie layer between the first layer and the second layer; wherein said tie layer constitutes means for bonding the first layer to the

A stock material of indefinite running length, said stock material comprising: A. a first layer of polyamide resin; and B. a second layer of polyolefin resin; and C. a tie layer between the first layer and the second layer; wherein said tie layer constitutes means for bonding the first layer to the second layer; and wherein said tie layer is a composition which is a mixture of: (1) a copolymer of ethylene and maleic anhydride; and (2) a particulate material comprising a first polyamide layer, a second polyolefin layer and a third layer of ethylene and maleic anhydride, said third layer being between the first polyamide layer and the second polyolefin layer.