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US 6,475,315 B1Granted
Method for making nonwoven fibrous product
AssigneeBoricel Corporation
InventorsJames Harvey Kean, Tod Mitchell Kean, Kenneth Roger Williams
Life of this patent
Estimating the term…
Abstract
Process for making nonwoven fibrous webs having substantial strength in the direction normal to their planes. The webs exhibit good acoustical insulation properties.
Claims16
A process for forming a nonwoven web of fibrous material comprising:
- (a) admixing about from 50% by weight of at least one support fiber for a period sufficient to disentangle and open the fibers and subsequently admixing with about from 5 to 35% by weight of at least one binder fiber to provide a substantially homogeneous mixture of fibers;
- (b) conveying the mixture of fibers into a shaker chute positioned at an angle of about from 90 to 150 degrees with respect to horizontal;
- (c) oscillating the fibers in the shaker chute for a period of about from 5 seconds to 1 minute to form a fiber web;
- (d) depositing the resulting fiber web onto a substantially horizontal planar surface at a substantially uniform thickness of about from ⅛ to 6 inches;
- (e) heating the fibers for a time and at a temperature sufficient to fuse at least some of the fibers;
- and
- (f) cooling the web to a substantially ambient temperature.
4 more elements
A process for forming a nonwoven web of fibrous material comprising:
- (a) admixing about from 65% to 95% by weight of at least one support fiber for a period sufficient to disentangle and open the fibers and subsequently admixing with 5 to 35% by weight of at least one binder fiber to provide a substantially homogeneous mixture of fibers;
- (b) conveying the mixture of fibers into a shaker chute positioned at an angle of about from 90 to 150 degrees with respect to horizontal;
- (c) oscillating the fibers in the shaker chute for a period of about from 5 seconds to 1 minute to form a fiber web;
- (d) depositing the resulting fiber web onto a substantially horizontal planar surface at a substantially uniform thickness of about from ⅛ to 6 inches to form a web;
- (e) heating the fibers for a time and at a temperature sufficient to fuse at least some of the fibers;
- and
- (f) cooling the web to a substantially ambient temperature.
4 more elements
Dependencies are inferred from the claim text.