US 7,678,231 B2 · Process for increasing the basis weight of sheet materials

Abstract

Sheet-like products are disclosed containing an additive composition. In accordance with the present disclosure, the additive composition is applied to a creping surface. The additive composition includes at least an aqueous dispersion containing a thermoplastic polymer. A base sheet is then pressed against the creping surface for contact with the additive composition. The base sheet is then creped from the creping surface causing the additive composition to transfer to the base sheet. In particular, the additive composition is transferred to the base sheet in amounts greater than about 1% by weight, such as from about 2% to about 50% by weight. The additive composition may further include a lotion, a debonder, a softener, or mixtures thereof.

Claims23

Dependent claims

A process for producing a sheet product comprising:

applying an aqueous polyolefin dispersion to a moving creping surface, wherein said aqueous polyolefin dispersion comprises at least one thermoplastic resin, water, and at least one dispersing agent, wherein said aqueous polyolefin dispersion has an average particle size in the range of from 0.05 μm to 5 μm and a pH in a range of from 7 to 11, and wherein said dispersion comprises more than 25 percent by weight of water;
pressing a base sheet having an initial basis weight against the creping surface after the aqueous polyolefin dispersion has been applied, the aqueous polyolefin dispersion adhering the base sheet to the creping surface, wherein said base sheet comprises less than 50 percent by weight of cellulosic materials;
and
removing the base sheet from the creping surface, wherein the aqueous polyolefin dispersion transfers to the base sheet such that the basis weight of the base sheet increases by at least about 1 percent by weight.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

11/763,278Filed 14 Jun 2007 · continuation in part

Priority

15 Dec 2005

Published

US 2007/0137808 A113 Dec 2007

Granted

16 Mar 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

D21H 25/005
After-treatment of paper not provided for in groups D21H17/00 - D21H23/00: mechanical treatment
A47K 10/16
Body-drying implements; Toilet paper; Holders therefor: paper towels; Toilet paper; Holders therefor
B32B 5/22
Layered products characterised by the non- homogeneity or physical structure , i.e. comprising a fibrous, filamentary, particulate or foam…
D21H 21/146
Characterised by function or properties in or on the paper: crêping adhesives

Family

Application11/303,002Parent of this continuation-in-part · filed 15 Dec 2005

Application11/304,490Parent of this continuation-in-part · filed 15 Dec 2005

Application11/303,036Parent of this continuation-in-part · filed 15 Dec 2005

Application11/304,998Parent of this continuation-in-part · filed 15 Dec 2005

Application11/304,063Parent of this continuation-in-part · filed 15 Dec 2005

Application11/635,385Parent of this continuation-in-part · filed 7 Dec 2006

US 2007/0284069 A1Pre-grant publication · published 13 Dec 2007

US 2007/0137808 A1Published application

US 2007/0137809 A1Published application

US 2007/0137810 A1Published application

US 2007/0137811 A1Published application