Title:
PAPER MACHINE DRYER FABRICS CONTAINING HOLLOW MONOFILAMENTS
Document Type and Number:
WIPO Patent Application WO1993017180
Kind Code:
A3
Abstract:
PCT No. PCT/CA93/00075 Sec. 371 Date Oct. 24, 1994 Sec. 102(e) Date Oct. 24, 1994 PCT Filed Feb. 25, 1993 PCT Pub. No. WO93/17180 PCT Pub. Date Sep. 2, 1993A paper machine dryer fabric includes hollow thermoplastic monofilaments to replace at least a portion of the wefts, also known as cross-machine direction strands. Fabrics including such monofilaments may be either a woven fabric, or a spiral fabric. The deformable nature of the hollow monofilaments decreaes the air permeability of the fabric, and in the case of spiral fabrics, improves monofilaments retention within the helical coils between the hinge yarns. The hollow monofilaments have a solidity in the range of from about 60% to about 75%. A suitable thermoplastic is polyethylene terephthalate. Hollow monofilaments do not have the disadvantages of other deformable yarns, such as spun yarns, multifilament yarns or plied monofilament yarns, each of which tend to hold and entrap within their structure both water and foreign matter.
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Inventors:
BAKER SAMUEL (CA)
HARRISON JAMES (CA)
HARRISON JAMES (CA)
Application Number:
PCT/CA1993/000075
Publication Date:
September 30, 1993
Filing Date:
February 25, 1993
Export Citation:
Assignee:
JWI LTD (CA)
International Classes:
D03D15/00; D03D1/00; D21F1/00; D21F7/08; (IPC1-7): D21F1/00
Foreign References:
| GB2216914A | 1989-10-18 | |||
| EP0036527A1 | 1981-09-30 | |||
| US4632716A | 1986-12-30 | |||
| DE8706893U1 | 1987-08-06 |
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