Topically treated tissue product
A low-cost, in-line process for treating a fibrous web with a lotion is provided. The process generally involves passing a web through a nip formed by a pair of opposed surfaces, where one of the surfaces has been treated with a lotion having a penetration hardness greater than 5.0 mm. As the web passes through the nip, the lotion is transferred from one of the opposed surfaces to the surface of the web. In certain instances, the web may have a textured surface and only a portion of the web's textured surface is treated with a lotion.
1. A method of manufacturing a lotion treated web comprising the steps of:
a. providing a first lotion composition having a penetration hardness ranging from about 5 to about 30 mm;
b. providing nip between a steel calender roll and a polymer coated calender roll;
c. applying the first lotion to the steel calender roll;
d. conveying a textured fibrous web having an upper most surface through the nip whereby one outwardly facing surface of the web is contacted by the steel calender roll resulting in a transfer of the first lotion to the surface of the textured fibrous web.
2. The method of claim 1 wherein the steel calender roll is heated and has a surface temperature ranging from about 70° C. to about 100° C.
3. The method of claim 1 wherein the steel calender roll is heated and has a surface temperature ranging from about 70° C. to about 90° C.
4. The method of claim 1 wherein the lotion comprises from about 30 weight percent (wt %) to about 90 wt % oil and from about 10 wt % to about 40 wt % wax.
5. The method of claim 1 wherein the lotion has a penetration hardness from about 10 to about 20 mm and comprises at least one oil selected from the group consisting of mineral oil, animal oil, plant oil and silicone oil, at least one wax selected from the group consisting of natural wax, petroleum wax, silicone wax and synthetic wax and at least one fatty alcohol selected from the group consisting of cetyl alcohol, stearyl alcohol, behenyl alcohol and dodecyl alcohol.
6. The method of claim 5 wherein the lotion comprises from about 30 to about 90 weight percent oil, from about 10 wt % to about 40 wt % wax and from about 15 wt % to about 25 wt % fatty alcohol.
7. The method of claim 1 wherein the lotion comprises a high molecular weight polyethylene glycol or propylene glycol.
8. The method of claim 1 wherein the web has a first side to be contacted by a user in-use, the first side having an uppermost surface lying in a first surface plane and a second surface lying in a second surface plane, the second surface plane lying below the first surface plane, and a lotion selectively disposed on the uppermost surface.
9. The method of claim 1 wherein the web has a web caliper and the web caliper is reduced after being conveyed through the nip.
10. The method of claim 1 wherein the lotion is selectively disposed on the uppermost surface in an amount ranging from about 0.20 to about 3.0 grams per square meter of textured fibrous web.
11. The method of claim 1 wherein the web has a total surface area and the lotion is transferred to about 70 percent to about 95 percent of the total surface area of the web.
12. The method of claim 1 wherein the step of applying the lotion to the steel calender roll comprises urging the first lotion against the steel calender roll at a feed rate ranging from about 0.05 to about 0.2 mm per second.
13. The method of claim 1 wherein the web is conveyed through the nip at a speed ranging from about 15 to about 300 meters per minute (mpm).
14. The method of claim 1 further comprising the steps of providing a second lotion having a penetration hardness ranging from about 5 to about 30 mm and applying the second solid lotion to the steel calender roll, wherein the first and the second solid lotions are different.