Separating of fibers from a fiber-containing solid sample

Details Separating of fibers from a fiber-containing solid sample Separating of fibers from a fiber-containing solid sample

1990-04-23

1992-11-03

Dang, Thi

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

436174, 436175, 436178, 162 55, 422102, G01N 110

Patent

active

051605783

ABSTRACT:
A method is provided for separating fibers from a solid sample which includes a solid material having fibers embedded therein. A first chamber, containing the sample, and a second chamber are defined within an appropriate vessel(s) such that the first chamber is positioned generally above the second chamber, and a filter is positioned between the chambers. At least one conduit, having at least one valve associated therewith, is further provided which is in fluid communication with the second chamber. Closure of such valve(s) substantially seals the second chamber except for fluid communication of the second chamber with the first chamber through the filter. While the second chamber is in such a sealed condition, digestion liquid is introduced to the first chamber so as to at least partially immerse the sample, whereupon liquid flows through the filter and into the second chamber so as to progressively increase the gas pressure in the second chamber to thereby progressively decrease the flow of liquid into the second chamber. After a predetermined digestion period, the valve(s) is opened to allow withdrawal of gases from the second chamber to thereby reduce the pressure therein and allow liquid remaining in the first chamber to flow into the second chamber.

REFERENCES:
patent: 43015 (1864-06-01), Fuller et al.
patent: 4517053 (1985-05-01), Devine
patent: 4533643 (1985-08-01), Bell et al.
patent: 4578764 (1986-03-01), Hutchins et al.
patent: 4726732 (1988-02-01), Kato
patent: 4727494 (1988-02-01), Buote
patent: 4908099 (1990-03-01), Delong

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