Process for forming laminated pipe

Details Process for forming laminated pipe Process for forming laminated pipe

B - Operations, Transporting

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C

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B29C 35/04 (2006.01) B29B 13/02 (2006.01) B29C 49/46 (2006.01) B29C 55/24 (2006.01) B29C 63/06 (2006.01) B29C 70/82 (2006.01) B32B 1/08 (2006.01) B32B 25/10 (2006.01) F16L 9/12 (2006.01)

Patent

CA 1152877

ABSTRACT A laminated tubular structure is obtained by a process in which a fabric sleeve is applied about a tube of thermoplastic polymer, following which plugs are inserted into the opposing ends of the liner. A liquid, such as water, is then introduced to the liner, and the liner is rotated about a horizontal axis while heat is applied to the exterior surface of the liner, causing the surface to become molten. The heat also causes vaporization of some of the liquid in the liner and the resulting vapor pressure causes the molten surface of the liner to expand radially into the interstices of the fabric sleeve. The inner surface of the liner remains solid and form-maintaining by reason of the liquid within the liner and heat absorbed on vaporization of liquid. Upon cooling, there is obtained a good mechanical bond between the liner and sleeve. The liner-sleeve composite can be further reinforced by a surrounding layer of a thermosetting resin containing reinforcing fibers, the resin layer being bonded to the composite by means of the sleeve.

388547

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