Vacuum bonded non-woven batt

Details Vacuum bonded non-woven batt Vacuum bonded non-woven batt

1986-04-16

1987-05-26

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

5448, 156285, 264517, 264518, 428280, 428282, 428284, 428286, 428287, 428288, 428296, B32B 702

Patent

active

046685626

ABSTRACT:
A dense, resilient, non-woven staple polymer fiber batt is formed of either of a plurality of overlayed, relatively thin webs or at least one relatively thick web. The web or webs comprise at least first and second staple polymer fiber constituents blended to form a homogenous mixture. The first fiber constituent has a relatively low melting temperature and the second fiber constituent has a relatively high melting temperature. The fibers of the first fiber constituent are fused by heat to themselves and to fibers of a second fiber constituent to interconnect the fibers while in a vacuum-compressed state. The heat is sufficient to melt the fibers of the first fiber constituent but not high enough to melt the fibers of the second fiber constituent. Therefore, the fibers of the first fiber constituent retain a plastic memory of the batt in its compressed state to hold the interconnected web layers together at the compressed thickness of the batt, and the fibers of the second fiber constituent retain the plastic memory of the fibers in their non-compressed state to provide substantial resilience.

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