Process for the treatment of a fibrous sheet obtained by papermaking process, with a view to improving its dimensional stability, and application of said process to the field of floor and wall-coverings

• US 4,710,422 A
• Filed: 01/16/1986
• Issued: 12/01/1987
• Est. Priority Date: 01/18/1985
• Status: Expired due to Term

• Current Assignee: Cascades Sainte Marie SA
• Original Assignee: Arjomari-Prioux
• Inventors: Fredenucci, Pierre
• Primary Examiner(s): Page, Thurman K.
• Application Number:
  US06/819,349
• Time in Patent Office: 684 Days
• Field of Search: 427/389.9, 427/392, 427/391, 427/393.1, 427/393.4, 428/240, 428/265, 428/288, 428/289
• US Class Current: 442/119
• CPC Class Codes: D21H 17/28 Starch
• CPC Class Codes: D21H 17/34 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: D21H 17/55 Polyamides; Polyaminoamides; Polyester-amides
• CPC Class Codes: Y10T 442/2492 Polyether group containing

Abstract

The invention relates to a treatment process for improving the dimensional stability of a fibrous sheet obtained by papermaking process, and of which at least part of the fibers are cellulosic fibers, said process consisting in impregnating the sheet with a chemical composition containing at least one wetting agent and one binder.

Claims

1. A process for improving the dimensional stability of a fibrous sheet obtained by a papermaking process, said sheet being made of fibers, at least a part of which are hydrophilic fibers, wherein said sheet is impregnated with a non-foaming chemical composition containing at least one wetting agent selected from the group consisting of polyglycols and derivatives thereof, and an aqueous solution of polyamide-polyamine-epichlorhydrin resin.

2. A process for improving the dimensional stability of a fibrous sheet containing cellulosic fibers for coating supports for floor and wall coverings obtained by a papermaking process which comprises impregnating said sheet with a chemical composition containing polyethylene- glycol and an aqueous solution of polyamide-polyamine-epichlorhydrin resin.

3. A process for improving the dimensional stability of a fibrous sheet containing cellulosic fibers for coating supports for floor and wall coverings obtained by a papermaking process which comprises impregnating said sheet with a chemical composition containing at least one wetting agent selected from the group consisting of polyglycols and derivatives thereof, and at least one organic binder selected from the group consisting of SBR, acrylic and PVC polymers, vinylactate-vinylchloride-ethylene terpolysers, wherein the impregnating mixture contains at least 15 parts by weight of wetting agent for 100 parts by dry weight of binder and wetting agent, and the binder is in the form of a synthetic latex which has a surface tension of less than 40 mN/m.

4. A floor or wall covering support formed from a fibrous sheet containing cellulosic fibers obtained by a papermaking process which comprises impregnating said sheet with a chemical composition containing at least one wetting agent select from the group consisting of polyglycols and derivatives thereof, and at least one organic binder selected from the group consisting of SBR, acrylic and PVC polymers, vinyl-acetate-vinylchloride-ethylene terpolymers, starch, polyvinylic alcohols, and polyamide-polyamine-epichlorhydrin resins.