Creping process utilizing low temperature-curing adhesive
US6187140A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1998 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Dec 7, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of increasing the wet strength of a creped sheet, which method involves providing a sheet which includes cellulosic fibers, which sheet has a first side and a second side; applying a low temperature-curing latex adhesive binder composition to the first side of the sheet in a fine, spaced-apart pattern occupying from about 20 to about 50 percent of the surface area of the sheet; adhering the first side of the sheet to a creping surface; and creping the sheet from the creping surface. The binder composition is adapted to adhere the sheet to the creping surface and includes a functional group-containing latex, a functional group-reactive crosslinking agent, and a volatile base. In addition, the creping surface is heated at a temperature no greater than about 100.degree. C. The low temperature-curing latex adhesive binder composition is adapted to have cured to a level, by the time the sheet is removed from the creping surface, which imparts to the creped sheet a cross-direction wet tensile strength which is at least about 50 percent that of an identical creped sheet which has been heated at about 150.degree. C. for three minutes, in which the cross-direction wet tensile is te…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.