Claims
- 1. Thermal insulation that comprises:
- a corrugated nonwoven web and a means for retaining the corrugated shape of the corrugated nonwoven web;
- the corrugated nonwoven web having a solidity of 0.1 or less and containing microfiber and crimped staple fibers that have a percent crimp of at least fifteen percent, the shape-retaining means being secured to valleys of the corrugations in the corrugated nonwoven web such that the shape-retaining means is not coextensive with the corrugated nonwoven web.
- 2. The thermal insulation of claim 1, wherein 25 to 75 weight percent of the fibers in the nonwoven web are crimped staple fibers having a percent crimp of at least fifteen percent, and 75 to 25 weight percent of the fibers are microfibers.
- 3. The thermal insulation of claim 2, wherein the corrugated nonwoven web has a solidity in the range of 0.008 to 0.07.
- 4. The thermal insulation of claims 3, wherein the corrugated nonwoven web has a peak to valley height of 4 to 50 millimeters.
- 5. The thermal insulation of claim 4, wherein the corrugated nonwoven web has a pore size of 15 to 100 micrometers.
- 6. The thermal insulation of claim 2, wherein the corrugations are generally parallel corrugations and the shape-reining means is intermittently bonded to the valleys of the corrugations.
Parent Case Info
This a division of application Ser. No. 08/093,398 filed Jul. 19, 1993 which is a continuation-in-part of application Ser. No. 07/925,384, filed Aug. 4, 1992, abandoned, the disclosures of which are incorporated here by reference.
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
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0 079 414 |
May 1983 |
EPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
93398 |
Jul 1993 |
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Continuation in Parts (1)
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Number |
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Parent |
925384 |
Aug 1992 |
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