Integrally foamed article having threefold-laminated cover material
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United States of America Patent
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Mar 3, 1992
Grant Date -
N/A
app pub date -
Dec 28, 1989
filing date -
Mar 10, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An integrally foamed article comprises a threefold-laminated cover material and a body foam bonded together thereto. The threefold-laminated cover material is preliminarily configured into a substantially closed hollow shape corresponding to a desired final contour into which a foamable mixture such as reactive polyurethane stock is poured and allowed to foam and expand to adhere integrally therewith without any penetration into said cover material. The threefold-laminated cover material is composed of an outermost permeable cover fabric such as knitted or woven fabric, an intermediate thin foam layer bonded to the inside of said fabric, and an innermost shielding film such as polyvinyl chloride or polyurethane film formed therein with a number of minute air holes permitting gases and air to be passed therethrough, but not permitting said foamable mixture to enter. The shielding film is strongly bonded to the inside of said intermediate thin foam layer, and not only assures excellent fluidity of the foamable mixture poured therein due to its smoothness, but also prevents penetration of said foamable mixture into said intermediate layer and cover fabric so as to ensure production of formed article, particularly of thin thickness, having uniform resiliency and softness and comfortable touch.
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