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EP0004480A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for treating papermaking fabrics

Assignee: Asten Inc
•
Filing: 1979-03-28
•
Granted: —
•
Expires: 1999-03-28
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Abstract

Abstract A process for treating papermaking fabrics, in particular dryer fabrics, includes, coating the back surface of the fabric with a thickened resin mixture. To reduce the air permeability of a woven dryer fabric, the fabric is impregnated within a thickened resin mixture to close up a portion of the interstices between the woven yarns. By applying a thickened resin mixture having a viscosity of between 1,000 and 5,000 centipoise to the back surface of the dryer fabric, the fabric is impregnated in a single pass with a sufficient quantity of the mixture to reduce the air permeability to the desirable level. …<??>The fabric (8) is drawn over a treating roller (9) in contact with a roller (15) partially immersed in a pool (10) of the resin mixture. The fabric (8) is held against the roller (9) with the assistance of a pressure roller (12) and a doctor knife (13) is arranged downstream of the roller (12) (figure 4).

Inventors

  • 👤 Frederick D. Rotar

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 12:46
CPC Classifications
D; D06; D06B; D06B1/00; D06B1/10; D06B1/14; D06B1/142

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 114 words
Process for treating a papermaking fabric, in which an untreated woven fabric having an air permeability of between 82.6 and 377.6 1/s is coated with a resin in fluent state, and dried, said dried resin partially filling the interstices of the fabric to reduce its air permeability, characterised in that said fabric is coated only on its rear surface with a resin mixture having a viscosity of 1000 to 5000 centipoise in such a manner as to form a continuous resin film over the interstices of the fabric while maintaining the front surface of the fabric substantially uncoated, the said resin film being caused to shrink and break open within the interstices when dried.
Claim 2
Dependent Claim 114 words
Process for treating a papermaking fabric, in which an untreated woven fabric having an air permeability of between 82.6 and 377.6 1/s is coated with a resin in fluent state, and dried, said dried resin partially filling the interstices of the fabric to reduce its air permeability, characterised in that said fabric is coated only on its rear surface with a resin mixture having a viscosity of 1000 to 5000 centipoise in such a manner as to form a continuous resin film over the interstices of the fabric while maintaining the front surface of the fabric substantially uncoated, the said resin film being caused to shrink and break open within the interstices when dried.
Claim 3
Dependent Claim 27 words
Process according to claim 1 characterised in that the permeability of the fabric is reduced to 14.16 to 70.8 1/s in a single coating of the fabric.
Claim 4
Dependent Claim 25 words
Process according to claim 1 or 2, characterised in that the resin in fluent state has a solids content of 10% to 20% by weight.

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