Process for applying chemical papermaking additives to web substrate
First Claim
1. A process for applying a chemical additive to a fibrous web, the process comprising the steps of:
- (a) providing a fibrous web having a first side and a second side opposite to the first side;
(b) providing a chemical additive;
(c) depositing the chemical additive only to the first side of the fibrous web;
(d) maintaining the chemical additive deposited onto the first side of the web in a transferable condition such that a ratio of an open time to a drop absorbency time less than 3.0;
(e) causing the first side of the fibrous web to contact the second side of the fibrous web thereby partially transferring the chemical additive from the first side to the second side of the fibrous web such that both the first side and the second side of the fibrous web comprise the chemical additive in a functionally sufficient amount.
1 Assignment
0 Petitions
Accused Products
Abstract
A process for applying a chemical additive, such as a softener, to a fibrous web comprises the steps of: providing a fibrous web having a first side and a second side opposite to the first side; providing a chemical additive; depositing the chemical additive only to the first side of the fibrous web; causing the first side of the fibrous web to contact the second side of the fibrous web thereby partially transferring the chemical additive from the first side to the second side of the fibrous web such that both the first side and the second side of the fibrous web comprise the chemical additive in a functionally sufficient amount. Preferably, the step of causing the two sides of the web to contact comprises winding the web into a roll.
-
Citations
25 Claims
-
1. A process for applying a chemical additive to a fibrous web, the process comprising the steps of:
-
(a) providing a fibrous web having a first side and a second side opposite to the first side; (b) providing a chemical additive; (c) depositing the chemical additive only to the first side of the fibrous web; (d) maintaining the chemical additive deposited onto the first side of the web in a transferable condition such that a ratio of an open time to a drop absorbency time less than 3.0; (e) causing the first side of the fibrous web to contact the second side of the fibrous web thereby partially transferring the chemical additive from the first side to the second side of the fibrous web such that both the first side and the second side of the fibrous web comprise the chemical additive in a functionally sufficient amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A process for applying a chemical additive to a fibrous web, the process comprising the steps of:
-
(a) providing a fibrous web having a first side and a second side opposite to the first side; (b) providing a softening composition selected from the group consisting of lubricants, plasticizers, cationic debonders, noncationic debonders, and mixtures thereof; (c) depositing the softening composition only to the first side of the fibrous web in the amount of at least 0.05 gram of the softening composition per square meter of the web; (d) maintaining the softening composition disposed on the first side of the fibrous web in a transferable condition such that a ratio of an open time to a drop absorbency time less than 3.0; (e) continuously winding the fibrous web into a roll thereby causing the first side of the fibrous web to contact the second side of the fibrous web such that the softening composition disposed on the first side is partially transferred therefrom to the second side of the web, wherein the amount of the softening composition transferred from the first side to the second side of the fibrous web is such that a ratio of a surface concentration of the chemical additive on the second side to a surface concentration of the chemical additive on the first side is at least 1;
4. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
Specification