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US 5,470,656 AGranted
Moisture-stable flexible structural adhesive strand
AssigneeE. I. Du Pont de Nemours and Company
InventorsJeffrey L. Kennard, George K. Kodokian, Peter Popper, Kalika R. Samant
Life of this patent
Estimating the term…
Abstract
This invention is a moisture-stable, flexible, structural adhesive strand which is suitable for use in the manufacture of an elongated pile article. The strand of this invention is comprised of a core of reinforcing multifilaments and a sheath of moisture-sensitive thermoplastic resin. The cross-sectional area ratio of reinforcing filaments to thermoplastic resin is in the range of about 0.04 to less than 0.3.
Claims5
A moisture-stable, flexible, structural adhesive strand comprising:
- a core consisting essentially of continuous moisture-insensitive reinforcing filaments, said core having a periphery and an interior portion;
- and a sheath of a moisture-sensitive, thermoplastic resin, said sheath surrounding said core and adhered to the periphery of said core so that reinforcing filaments at the interior portion of said core are movable relative to said sheath, said strand having a cross-sectional area ratio of reinforcing filaments to moisture-sensitive thermoplastic resin in the range of about 0.04 to less than 0.30 whereby said strand has a change in length response from maximum expansion to maximum shrinkage of less than 2.0%, relative to a starting length measured at 20.degree. C., 50% RH, due to changes in temperature and humidity over a relative humidity range of 0-100% and a temperature range from 5.degree. C. to 40.degree. C.
Dependencies are inferred from the claim text.