US4096311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wipe dry improvement of non-woven, dry-formed webs
Assignee: Kimberly Clark Tissue Co
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Filing: 1975-10-31
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Granted: 1978-06-20
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Expires: 1995-10-31
Abstract
Abstract Wipe-dry characteristics of non-woven, dry-formed webs are improved by a post-treatment process that adds water and a surfactant to the web followed by wet-working the web. The effectiveness of the surfactant for improving the wipe-dry capability is noticeably enhanced by working the web while it is still wet with the water and the surfactant. Preferred surfactant addition is from about 0.5% to about 3% by weight surfactant based upon the weight of the web.
Inventors
- 👤 Eugene J. Pietreniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:10
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/049; D; D21; D21H; D21H25/00; D21H5/00; D21H5/26; D21H5/265; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2484
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
63 words
A method of improving the wipe dry characteristic of a dry-formed, adhesively bonded, web having a density less than about 0.16 grams/cubic centimeter, comprising; wetting the web with water and with from about 0.5% to about 3% of a surfactant, working the wet web to cause relative movement of the fibers comprising the web with respect to each other, and drying the web.
Claim 2
Independent Claim
63 words
A method of improving the wipe dry characteristic of a dry-formed, adhesively bonded, web having a density less than about 0.16 grams/cubic centimeter, comprising; wetting the web with water and with from about 0.5% to about 3% of a surfactant, working the wet web to cause relative movement of the fibers comprising the web with respect to each other, and drying the web.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein the surfactant is an anionic surfactant.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein the surfactant is a cationic surfactant.
Claim 5
Dependent Claim
12 words
The method of claim 1, wherein the surfactant is a nonionic surfactant.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein the surfactant is an amphoteric surfactant.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein the surfactant is added to the web prior to the addition of water.
Claim 8
Dependent Claim
17 words
The method of claim 1, wherein the surfactant addition onto the web is about 2% by weight.
Claim 9
Dependent Claim
58 words
The method of claim 1, wherein the wet working comprises compressing the web by passing the wetted web through rollers having a gap between rollers less than the thickness of the web, said compressing being insufficient to increase the density of the web by 30% in comparison to the density of the wet web prior to wet working.
Claim 10
Dependent Claim
27 words
The method of the claim 8, wherein the wet working is repeated at least three times by passing the web through at least three sets of rollers.
Claim 11
Dependent Claim
28 words
The method of claim 1, wherein the web is embossed to produce densified regions on the surface of the web prior to wetting and treating with the surfactant.
Claim 12
Dependent Claim
31 words
The method of claim 1, wherein the drying removes sufficient moisture to result in a web having less than about 5% moisture content based upon the dry weight of the web.
Claim 13
Dependent Claim
46 words
The method of claim 1, wherein the adhesive has been dried and cured prior to wet working to impart sufficient bonding of the fibers in the web so that the web has sufficient machine direction strength to permit creping of the web from a creping surface.
Claim 14
Dependent Claim
17 words
The method of claim 1, wherein the drying of the web further cures or dries the adhesive.
Claim 15
Dependent Claim
40 words
The method of claim 1, wherein the surfactant is an ethoxylated secondary alcohol produced by ethoxylating a mixture of linear secondary alcohols containing from 11 carbon atoms to 15 carbon atoms with a hydrophylic moiety containing 15 ethylene oxide groups.
Claim 16
Dependent Claim
15 words
The method of claim 1, wherein the surfactant is a liquid solution containing modified akylarylsulfonate.
Claim 17
Dependent Claim
31 words
The method of claim 1, wherein the surfactant is N-alkyl trimethyl ammonium chloride in which the alkyl group is a mixture of about 6% hexadecyl, 93% octadecyl and about 1% octadecenyl.
Claim 18
Dependent Claim
30 words
The method of claim 1, wherein the wetting of the web with water is sufficient to add at least about 30% water based upon the dry weight of the web.
Claim 19
Dependent Claim
18 words
The method of claim 1, wherein the wet working comprises passing the web through an embossing roll step.
Claim 20
Dependent Claim
11 words
The improved web produced according to the method of claim 1.
Claim 21
Dependent Claim
16 words
The improved web of claim 19 having a basis weight of from 80 to 120 pounds/ream.
Claim 22
Dependent Claim
11 words
The improved web produced according to the method of claim 8.
Claim 23
Dependent Claim
11 words
The improved web produced according to the method of claim 13.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |