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US 5,348,801 AGranted
Tape for reinforcing pressure-supporting hollow bodies and a method for repairing deteriorated pipes
AssigneeSnam S.p.A.
InventorsStefano Venzi, Adalberto Colombo
Life of this patent
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Abstract
A method for repairing and reinforcing pressure-supporting hollow bodies, in particular deteriorated underwater pipelines, using a tape formed from a plurality of layers.
Claims11
A multi-layer tape which maintains its structure in an apparatus which applies a tension of between 50 and 250 kg to the tape, for reinforcing pressure-supporting hollow bodies, comprising:
- a) a first layer of profiled strips composed of continuous unidirectional fibers embedded in a thermoplastic resin, said fibers having a softening point exceeding that of the thermoplastic resin;
- b) a second adhesive layer comprising rubber based compositions;
- c) a third layer comprising a thermoplastic polymeric composition;
- and
- d) a fourth adhesive layer comprising rubber based compositions.
2 more elements
A multi-layer tape which maintains its structure in an apparatus which applies a tension of between 50 and 250 kg to the tape, for reinforcing pressure-supporting hollow bodies, comprising:
- a) a first layer of profiled strips composed of continuous unidirectional fibers selected from the group consisting of asbestos fibers, glass fibers, boron fibers, carbon fibers, graphite fibers, and aromatic polyamide fibers embedded in a thermoplastic resin;
- b) a second adhesive layer comprising rubber based compositions;
- c) a third layer comprising a thermoplastic polymeric composition;
- and
- d) a fourth adhesive layer comprising rubber based compositions.
2 more elements
Dependencies are inferred from the claim text.