Partially fire resistant insulation material comprising unrefined virgin pulp fibers and wood ash fire retardant component
US8388807B2 · kind B2 · utility
6Cited by
88References
37Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 8, 2011 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Feb 28, 2031 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/34
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A partially fire resistant cellulosic fiber thermal insulation material from a fibrous web of unrefined virgin softwood and hardwood provides fibers which provides an R-value (as measured by the ASTM C518 test) of at least about 3, and a wood ash fire retardant component present in and/or on the fibrous web in an amount of at least about 1.5% by weight of the fibrous web and sufficient to impart at least partial fire resistance (as measured by the ASTM E970-08A test) to the fibrous web. Also, a process for preparing this at least partially fire resistant thermal insulation material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.