초록 ▼

Improved multi-wall containers and pipes for transporting fluids which have to be protected against leakage and mechanical forces, have an inner and outer wall separated by a continuous foam layer integrated into the containers. Improved strength and resistance to axial inertial pressure is provided

Improved multi-wall containers and pipes for transporting fluids which have to be protected against leakage and mechanical forces, have an inner and outer wall separated by a continuous foam layer integrated into the containers. Improved strength and resistance to axial inertial pressure is provided by the method of manufacture using chopped glass fibers, continuous windings of glass fibers and suitable polyester resins and circumferential ribs spaced at stress points and integrally incorporated into the containment walls. Vessels produced according to the methods of the invention have a moment of inertia strength of about 4.67 in4 substantially eliminating torquing, buckling and rupture.

대표청구항 ▼

A process for making multi-walled vessels of improved circumferential and axial strength for transporting and storing fluids, comprising the steps of: (a) Assembling on a cylindrical form or mold an overlay comprising a first sheet to receive a first layer of glass fiber reinforced resinous material

A process for making multi-walled vessels of improved circumferential and axial strength for transporting and storing fluids, comprising the steps of: (a) Assembling on a cylindrical form or mold an overlay comprising a first sheet to receive a first layer of glass fiber reinforced resinous material; (b) Applying a resinous material with chopped glass fibers over said first sheet to form a highly chemically resistant barrier; (c) Applying over said highly chemically resistant barrier, a resinous material with chopped glass fibers and continuous strands of glass fibers; (d) Curing said resinous material containing said chopped glass fibers and continuous strands of glass fibers to form a first containment wall; (e) Applying at predetermined points on said first containment wall substantially circumferential preformed continuous rib shaped foam, and securing said foam to said first containment wall; (f) Applying over said rib shaped foam chopped and continuous glass fibers with a resinous material to form a plurality of substantially circumferential ribs integrally bonded to said first containment wall; (g) Applying and securing bridging foam to said first containment wall between said ribs up to the level of the top of said ribs; (h) Applying over said bridging foam and said ribs, a resinous material with chopped glass fibers and continuous strands of glass fibers; and (i) Curing said resinous material containing said chopped glass fibers and continuous strands of glass fibers to form a second containment wall integrally bonded to said ribs.