Method of making stretchable and compressible elongate member
AssigneeOwens-Corning Fiberglas Corporation
InventorAlfred Marzocchi
Life of this patent
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Abstract
A longitudinally stretchable and transversely compressible member is made by coating each of a bundle of generally parallel, continuous, non-interengaged strands with a vaporizable material (blowing agent), applying a thermosetting elastomeric material to the bundle so as to impregnate and surround the bundle and to separate the strands. A vapor impermeable skin is formed on the surface and the vaporizable material vaporized to form randomly disposed voids and to cause the strands to take an undulating path.
Claims10
A method of making a stretchable cord comprising:
- supplying a bundle of generally parallel continuous glass filaments;
- applying a coating of vaporizable material to filaments;
- subsequently applying a thermosetting elastomeric material to the bundle such that the material impregnates and surrounds the bundle and separates the filaments;
- forming a vapor impervious skin on the outer surface thereof;
- and
- applying energy to heat such bundle sufficient to effect curing the elastomeric material and such that at least a portion of the vaporizable material will vaporize to form irregular voids randomly located in the elastomeric material whereby the filaments assume undulating paths in the vicinity of the voids and whereby bulbous enlargements are formed at the outer suface of the cord in the vicinity of the voids.
The method of making a longitudinally stretchable and transversely compressible elongate member comprising:
- supplying a body of filaments;
- applying a vaporizable material to at least some of the filaments;
- subsequently impregnating such body with a thermosetting resilient matrix material;
- forming a vapor impervious skin at the outer surface of the matrix material;
- and
- subsequently heating such body sufficiently to effect curing of the thermosetting material and to vaporize at least some of the vaporizable material whereby voids are formed within the thermosetting material.
Dependencies are inferred from the claim text.