Fluff-type organic insulating pulp and method of fabrication and application
US5272852A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Jul 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/244
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An insulating pulp for insulating buildings and other type structures and wherein the pulp is formed of organic fibers having a fiber length of from about 1.0 mm to 3 mm. Such pulp is obtained by a chemi-thermomechanical pulping process and the pulp may be supplied in fluff form or compressed sheet form which is later defibrillized. A fire retardant additive and a corrosive buffing agent is added to the pulp. A major characteristic of such insulating pulp is that it has a density in the range of from about 0.6 to 4.0 lbs/ft.sup.3 and has an excellent thermal insulation value of about R3 to R4 per inch. The chemi-thermomechanical wood pulp is produced from debarked trees which are primarily black spruce which have these long and strong fibers. The pulp is applied by injecting it through a compressed air conduit and at the same time an adhesive is injected in the pulp to form a binding agent. Because of the property of the fibers and the fiber distribution in the fluff, the pulp is also an excellent acoustical insulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.