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US 5,865,950 AGranted
Process for creping tissue paper
AssigneeThe Procter & Gamble Company
InventorsKenneth Douglas Vinson, Khosrow Parviz Mohammadi, Paul Thomas Weisman
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Abstract
A process for dry creping tissue paper comprising the application of creping adhesives in at least two steps. The adhesive applied in at least one of the steps is a polyvinyl alcohol while the adhesive applied in at least one other step comprises a water-soluble, thermosetting, cationic polyamide resin. The process provides high adhesion and doctorability for dry creping.
Claims21
A process for creping a tissue paper web from a heated drying surface comprising the steps of:
- a) providing a semi-dry embryonic tissue paper web wherein said semi-dry embryonic tissue paper web is comprised of a wet laid web that is dried to less than about 40% moisture content;
- b) applying a first creping adhesive to the heated drying surface or to said semi-dry web, said first adhesive comprising a polyvinyl alcohol which forms an adhesive film and which has a degree of hydrolysis of at least about 80%;
- c) applying a second creping adhesive to the heated drying surface or to said semi-dry web, said second adhesive comprising a water-soluble, thermosetting, cationic polyamide resin wherein said water-soluble, thermosetting, cationic polyamide resin is added in sufficient amount to comprise from about 5% to about 50% by weight based on the solid weight of said water-soluble, thermosetting, cationic polyamide resin relative to the solid weight of the total applied creping adhesive composition, adding said polyvinyl alcohol in an amount sufficient to comprise from about 30% to about 95% by weight based on the solid weight of said polyvinyl alcohol relative to the solid weight of the total applied creping adhesive composition and applying the total creping adhesive composition at a rate of about 0.1 to about 10 pounds per ton based on the dry weight of the total creping adhesive composition and the dry weight of said semi-dry web;
- d) securing said semi-dry embryonic web by means of said first and second creping adhesives to the surface of said heated drying surface whereupon drying of said embryonic web is completed;
- e) creping the dry web from said heated drying surface by means of a flexible creping blade.
2 more elements
Dependencies are inferred from the claim text.