Extrudable multilayer tubing

Abstract

Method of fabricating a polymeric tube for attachment to a prefabricated tubular polymer body comprising: selecting an ethylene copolymer functionalized with a conjugated vinyl moiety, and coextruding an outer tubular layer comprised of the selected functionalized ethylene copolymer together with at least one inner tubular layer comprised of a thermoplastic elastomeric material to form a mating tube having an outer surface comprised of the functionalized ethylene copolymer, a central tubular passage having a longitudinal axis and opposing ends.

1 - 7 . (canceled) 
     
     
         8 . A bonded tubular assembly comprising:
 a prefabricated tubular body defining a hollow central tubular passage having a longitudinal axis bounded by an inner wall that is comprised of one or more of a polycarbonate, an acrylic or a copolymer containing an acrylonitrile,   a coextruded multilayer mating tube comprised of an outer tubular layer comprised of an ethylene copolymer functionalized with a conjugated vinyl moiety coextruded with at least one inner tubular layer comprised of a thermoplastic elastomeric material, the mating tube having an outer surface comprised of the functionalized ethylene copolymer, and a central tubular passage having a longitudinal axis and opposing ends,   wherein one of the ends of the mating tube has a treated outer surface along a selected axial llength, the treated surface comprising an alcohol or ketone or a UV or visible light curable containing material that causres the treated outer surface to adhere to the inner wall of the tubular body on curing or drying, and   wherein the one end with the treated outer surface is coaxially disposed within the central tubular passage of the prefabricated tubular body and the treated outer surface of the one end of the mating tube is bonded by curing or drying with the inner wall of the tubular body along a selected axial length of the mating tube   
     
     
         9 . The tubular assembly of  claim 8  wherein the ethylene copolymer is functionalized with a methyl acrylate containing moiety, an ethyl acrylate containing moiety or a vinyl acetate containing moiety. 
     
     
         10 . The tubular assembly of  claim 8  wherein the thermoplastic elastomeric material is comprised of a polyolefinic elastomeric material. 
     
     
         11 . The tubular assembly of  claim 8  wherein the outer layer of the mating tube is comprised of at least about 18% by weight of the conjugated vinyl moiety. 
     
     
         12 - 15 . (canceled) 
     
     
         16 . A polymeric tube for attachment to a prefabricated tubular polymer body, the prefabricated body defining a central tubular passage having a longitudinal axis bounded by an inner wall that is comprised of one or more of a polycarbonate, an acrylic or a copolymer containing an acrylonitrile, the polymeric tube comprising:
 an outer tubular layer comprised of a selected ethylene copolymer functionalized with a conjugated vinyl moiety,   wherein the outer layer is co-extruded together with at least one inner tubular layer that is comprised of a thermoplastic elastomeric material,   the outer and inner co-extruded layers being adhered to each other to form a mating tube having an outer surface comprised of the functionalized ethylene copolymer, and a central tubular passage having a longitudinal axis and opposing ends for insertion of at least one end into a central passage of the prefabricated tubular polymer body, wherein the outer surface of at least the outer tubular layer is treated with an alcohol or ketone or a UV or visible light curable containing material that causes, on curing or drying of the material treated on the outer surface when mated with the inner surface, the treated outer surface to adhere to the inner wall of the tubular body on insertion of the one end of the outer tubular layer along a selected axial length of the tubular body.   
     
     
         17 . The polymeric tube of  claim 16  further wherein the functionalized ethylene copolymer is functionalized with a methyl acrylate containing moiety, an ethyl acrylate containing moiety or a vinyl acetate containing moiety. 
     
     
         18 . The polymeric tube of  claim 16  wherein the thermoplastic elastomeric material to is comprised of a polyolefinic elastomeric material. 
     
     
         19 . The polymeric tube of  claim 16  wherein the functionalized ethylene copolymer is comprised of at least about 18% by weight of the conjugated vinyl moiety. 
     
     
         20 . The tubular assembly of  claim 8  wherein the alcohol or ketone of the containing material comprises an aliphatic alcohol or ketone. 
     
     
         21 . The tubular assembly of  claim 20 , wherein the containing material comprises an acrylate containing moiety.