초록 ▼

Thermoformable laminates, suitable for use as automobile headliners, comprising a layer of non-woven fabric (acoustical pad bonded to one side of a foamed polymer sheet are disclosed. The non-woven fabric comprises a certain blend of staple fibers which provide an optimum balance of characteristics

Thermoformable laminates, suitable for use as automobile headliners, comprising a layer of non-woven fabric (acoustical pad bonded to one side of a foamed polymer sheet are disclosed. The non-woven fabric comprises a certain blend of staple fibers which provide an optimum balance of characteristics including cost and improved sound absorption characteristics which are important headliner characteristics, especially, for compact and subcompact automobile uses.

대표청구항 ▼

A thermoformable laminate comprising an acoustical layer of non-woven fabric bonded to at least one side of a sheet of foamed thermoplastic polymer, said fabric comprising a blend of low melting staple binder fibers and high melting staple fibers and having a weight ranging from 5 to 25 oz/yd2 (170

A thermoformable laminate comprising an acoustical layer of non-woven fabric bonded to at least one side of a sheet of foamed thermoplastic polymer, said fabric comprising a blend of low melting staple binder fibers and high melting staple fibers and having a weight ranging from 5 to 25 oz/yd2 (170 to 848 g/m2), said low melting binder fibers being characterized in comprising from 2 to 20% by weight of said blend and in having melting points above 90°C. and below 200°C. and said high melting fibers being characterized in not melting, decomposing or becoming tacky at temperatures below 400°F. (204°C.) and in having average deniers in the range of 1 to 15 and lengths in the range of 0.5 to 6 inches (1.2 to 15.2 cm), said deniers and lengths being selected to provide a laminate which, after thermoforming, has a desired balance of sound absorption and stiffness characteristics, said low melting binder fibers being selected such that during thermoforming of said laminate they do not bind such fabric unless subjected to a temperature in the range of 120°C. to 160°C. and a pressure of 5 psi (3515.5 kg/m2).