Process for applying a thin film containing polysiloxane to tissue paper
US5246546A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1992 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Aug 27, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/56
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a process for making soft tissue paper which includes providing a dry tissue web and then applying a sufficient amount of a polysiloxane softener compound to the dry web. The softener application process includes the steps of diluting a polysiloxane compound with a suitable solvent, applying the diluted polysiloxane solution to a heated transfer surface, evaporating the solvent from the dilute solution to form a film, and then contacting the dry tissue web with the heated transfer surface. Preferably, the tissue web is dried to a moisture level below its equilibrium moisture content before application of the polysiloxane material. The process may further include the steps of applying an effective amount of a surfactant material to enhance softness and/or wettability control; and/or an effective amount of a binder material such as starch, for linting control, and/or to contribute tensile strength to the tissue paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.