Low-density web and method of applying an additive composition thereto
View Patent ↗Sheet-like products, such as tissue products made from a low-density web, are disclosed containing an additive composition. The additive composition, for instance, comprises an aqueous dispersion containing an alpha-olefin polymer, and an ethylene-carboxylic acid copolymer. The additive composition may be applied to the surface of the web so that it does not thoroughly or even substantially penetrate the web. For instance, the additive may be applied to one or both surfaces of the web by gravure printing, press coating, spraying or the like. The additive composition may improve the strength of the tissue web and/or improve the perceived softness of the web.
1. A web comprising greater than 50% cellulosic fibers having a bulk of greater than 3 cc/g and wherein said web comprises an aqueous polyolefin dispersion that is applied to the web by:
(a) presenting the web having a first surface and an opposite second surface, and
(b) applying the aqueous polyolefin dispersion on at least the first surface of the web without thoroughly penetrating the web, wherein the aqueous polyolefin dispersion has a viscosity of equal to or greater than a value calculated by an equation of y=40 e 0.07x , wherein y represents viscosity in a unit of centipoises, and x is a percentage of the emulsifier content calculated without water; and wherein the aqueous polyolefin dispersion comprises polyolefin particles having a size of 0.5 microns to 3 microns, and a solids level of 30% to 60%; and
(c) drying the web after the step of applying the aqueous polyolefin dispersion, wherein the particles are retained in particulate form.
2. The web of claim 1 wherein the step of drying the web is performed at ambient conditions.
3. The web of claim 1 wherein the step of drying the web is at a drying temperature of about 70° C.
4. The web of claim 1 wherein the web has a bulk of 3 cc/g to 20 cc/g.
5. The web of claim 1 wherein the step of applying the aqueous polyolefin dispersion on at least the first surface of the web is achieved by an application selected from the group consisting of spraying onto the web, extruding onto the web, foaming onto the web, and printing onto the web.
6. The web of claim 1 having an improvement in overall softness of 58% or greater than at least 0.2 according to the in Hand Ranking Test for Tactile Properties as defined herein.