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Process for producing composite plastic pipe
| Details |
Inventors: Karino, Saburo; Ishida, Yoshiaki;
Assignee: Dainippin Ink and Chemicals Inc. (Tokyo, JP)
Primary Examiner: Thurlow; Jeffery
Assistant Examiner: Dailey; Patrick
Attorney, Agent or Firm: Sherman & Shalloway
A process for producing a composite plastic pipe, which comprises producing a thermoplastic resin pipe (I) by an extruder, covering the surface of the pipe (I) uniformly with a continuous fibrous reinforcing material (II) impregnated with a thermosetting resin in its axial direction by a draw molding method, helically winding a continuous fibrous reinforcing material (III) impregnated or not impregnated with a thermosetting resin uniformly on the layer of the resin fibrous reinforcing material (II) by a filament winding method, thereafter curing the thermosetting resin by irradiation of ultraviolet light and coating a thermoplastic resin (IV) on the resulting product within a crosshead die in an extruder. |
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DETAILED DESCRIPTION What is claimed is: 1.
A process for producing a composite plastic pipe, which comprises producing a thermoplastic resin pipe (I) by an extruder, covering the surface of the pipe (I) uniformly with a continuous fibrous reinforcing material (II) impregnated with a thermosetting resin selected from the group consisting of unsaturated polyester resins and unsaturated carboxylic acid-modified vinyl ester in its axial direction by a draw molding method, helically winding a continuous fibrous reinforcing material (III) impregnated or not impregnated with the thermosetting resin uniformly on the layer of the resin fibrous reinforcing material (II) by a filament winding method, thereafter curing the thermosetting resin by irradiation of ultraviolet light and coating a thermosplastic resin (IV) on the resulting product within a crosshead die in an extruder.
2.
A process for producing a composite plastic pipe, which comprises producing a thermoplastic resin pipe (I) by an extruder, covering the surface of the pipe (I) uniformly with a continuous fibrous reinforcing material (II) impregnated with a thermosetting resin selected from the group consisting of unsaturated polyester resins and unsaturated carboxylic acid-modified vinyl ester in its axial direction by a draw molding method, helically winding a continuous fibrous reinforcing material (III) impregnated or not impregnated with the thermosetting resin uniformly on the layer of the resin fibrous reinforcing material (II) by a filament winding method, thereafter curing the thermosetting resin by irradiation of ultraviolet light and then post-curing it by heating, and coating a thermoplastic resin (IV) on the resulting product within a crosshead die in an extruder.
3.
The process of claim 1 wherein the thermoplastic resin pipe (I) is produced by using as a main component at least one resin selected from the group consisting of an olefin resin, a styrene resin, a polyamide resin, a vinyl chloride resin, a fluorocarbon resin, a polyester resin, a polycarbonate resin, a polyphenylene oxide resin, a polyphenylene sulfide resin, a polyphenylene sulfone resin, a polyacetal resin and a methacrylate resin
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