may be produced utilizing apparatus generally similar to that disclosed in mills et al u s pat no 3 347 274 which discloses apparatus for winding three narrow film strips about the periphery of a mandrel employing a winding belt wrapped about the strips and mandrel and driven by a driving wheel in order to provide the continuous inner layer 14 minor modifications are made in the extrusion apparatus shown in said mills et al patent so that a continuous inner layer is solution extruded onto the inner surface of the spirally wound outer layer the invention will be further illustrated by the following non limiting example a formulation for preparing a soft inner layer 14 was produced by mixing the following components ______________________________________polyvinyl acetate methyl alcohol solution 77 12 50 solids solid polyvinyl acetate polymer 6 28 plasticizer phthalate ester 9 93 adogen no 572 n oleyl propylene diamine 0 95 cab o sil silica thickener 6 47 red dye 0 05 ______________________________________ this formulation was solution extruded onto the inner surface of a spirally wound polyethylene terephthalate tube just after the point of tube formation utilizing a mandrel and a winding belt to produce the spirally wound tube the methyl alcohol solvent was evaporated leaving a laminated tubular product having a spirally wound polyvinyl terephthalate outer layer and a relatively soft inner layer consisting essentially.