초록 ▼

A multilayer film is prepared by coextruding nylon with a chemically modified polyolefin which has functional groups added to the basic polymer to provide strong adhesion to the nylon after coextrusion. The multiple layer film combines the strength and protection properties of the nylon with desired

A multilayer film is prepared by coextruding nylon with a chemically modified polyolefin which has functional groups added to the basic polymer to provide strong adhesion to the nylon after coextrusion. The multiple layer film combines the strength and protection properties of the nylon with desired properties in the modified polyolefin. Multiple layer films may be produced by coextruding nylon layers with multiple layers of the modified polyolefin, and with additional layers of nonmodified polyolefins and other polymers. Suitable commercially available modified polyolefins for use in the multilayer film include Plexar-1 and Plexar-3 described in U.S. patent application Ser. No. 616,035, and Plexar-2 described in U.S. patent application Ser. No. 616,374, both filed in September, 1975, now abandoned, and respective continuation-in-parts thereof Ser. No. 808,080, now U.S. Pat. No. 4,087,588, and Ser. No. 808,079, now U.S. Pat. No. 4,087,587.

대표청구항 ▼

A process for producing a multilayer film, comprising: coextruding nylon and a chemically modified polyolefin selected from the group consisting of ethylene vinyl acetate polymer, high density polyethylene and rubber modified high density polyethylene, each chemically modified by the provision of fu

A process for producing a multilayer film, comprising: coextruding nylon and a chemically modified polyolefin selected from the group consisting of ethylene vinyl acetate polymer, high density polyethylene and rubber modified high density polyethylene, each chemically modified by the provision of functional groups to the polymer which have a strong affinity for nylon and which will form a strong bond to nylon under heat and pressure of coextrusion. A multilayer film comprising: a coextrusion of nylon and a chemically modified polyolefin selected from the group consisting of ethylene vinyl acetate polymer, high density polyethylene, and rubber modified high density polyethylene, each chemically modified by the provision of functional groups to the polymer which have a strong affinity for nylon and which will form strong bonds to nylon under the heat and pressure of coextrusion.