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US 6,585,076 B2Granted
Cardable fiber blend and a moldable fiber batt and the process for making a moldable fiber batt
AssigneeE. I. Du Pont de Nemours and Company
InventorAnil Kohli
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Abstract
The present invention provides a cardable fiber blend which forms a moldable fiber batt, the blend comprising fibers having a modulus of 550 g/denier or more with fibers of a thermoplastic polymer wherein the high modulus polymer fibers are all uncrimped fibers or a mixture of crimped and uncrimped fibers. The moldable batt is useful in making speaker cones.
Claims1
A speaker cone formed by
- (a) blending together high modulus polymer fibers having a modulus of 550 g/denier or more with fibers of a crimped thermoplastic polymer wherein the high modulus polymer fibers are all uncrimped fibers or a mixture of crimped and uncrimped fibers,
- (b) passing the blend through a device to open the fibers, and
- (c) forming the fibers into a batt,
- wherein after step (c), the batt is molded in a high temperature, high pressure mold and wherein the high modulus polymer fibers are selected from the group consisting of p-aramid and aromatic polyester fibers.
1 more element
Dependencies are inferred from the claim text.