US3960482A
Expired / Lapsed
US
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Durable press process employing high mositure content fabrics
Assignee: American Laundry Machinery Co
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Filing: 1974-07-05
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Granted: 1976-06-01
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Expires: 1994-07-05
Abstract
Abstract Cellulosic fiber-containing fabrics are made wrinkle resistant by a durable press process which comprises impregnating the fabric with an aqueous solution containing a water soluble acid, acid salt, or mixture thereof, capable of catalyzing the cross-linking reaction between formaldehyde and cellulose, and then exposing the impregnated fabric, while the fabric has a moisture content of above 20% by weight where the cellulose fibers are substantially completely swollen, to formaldehyde vapors and curing.
Inventors
- 👤 George Louis Payet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:57
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/127
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
113 words
A durable-press process for cellulosic fiber-containing fabrics, comprising, impregnating a cellulosic fiber-containing fabric with an aqueous solution containing a water soluble normally solid catalyst selected from the group consisting of acids, acid salts and mixtures thereof which are capable of catalyzing the cross-linking reaction between formaldehyde and cellulose, to provide from 0.1 to about 10.0 percent of said catalyst in said fabric on a dry weight basis, then exposing said impregnated fabric, while said fabric has a moisture content of about 20 percent by weight where the cellulose fibers are substantially completely swollen, to formaldehyde vapors and curing under conditions at which formaldehyde reacts with cellulose in the presence of the catalyst to
Claim 2
Dependent Claim
113 words
A durable-press process for cellulosic fiber-containing fabrics, comprising, impregnating a cellulosic fiber-containing fabric with an aqueous solution containing a water soluble normally solid catalyst selected from the group consisting of acids, acid salts and mixtures thereof which are capable of catalyzing the cross-linking reaction between formaldehyde and cellulose, to provide from 0.1 to about 10.0 percent of said catalyst in said fabric on a dry weight basis, then exposing said impregnated fabric, while said fabric has a moisture content of about 20 percent by weight where the cellulose fibers are substantially completely swollen, to formaldehyde vapors and curing under conditions at which formaldehyde reacts with cellulose in the presence of the catalyst to
Claim 3
Dependent Claim
39 words
The process of claim 1, wherein the catalyst is an acid salt selected from the group consisting of ammonium, magnesium, zinc, aluminum and alkaline earth metal chlorides, bromides, bifluorides, nitrates, sulfates, fluorates, phosphates and fluoroborates, and aluminum and zirconium
Claim 4
Dependent Claim
24 words
The process of claim 1, wherein the catalyst is a water soluble acid selected from the group consisting of sulfamic acid, citric acid, oxalic
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein the catalyst is a mixture of magnesium
Claim 6
Dependent Claim
26 words
The process of claim 1, wherein the moisture content of the fabric at the time of exposure to formaldehyde is above about 30 percent by weight.
Claim 7
Dependent Claim
12 words
The process of claim 1, wherein the fabric is a cotton-polyester blend.
Claim 8
Dependent Claim
11 words
The process of claim 1, wherein the temperature during the cross-linking
Claim 9
Dependent Claim
10 words
The process of claim 1, wherein the catalyst is aluminum
Claim 10
Dependent Claim
24 words
The process of claim 1, wherein the impregnated fabric is dried and then remoistened to a moisture content of about 20 percent by weight
Claim 11
Dependent Claim
25 words
The process of claim 1, wherein the impregnated fabric is dried and formed into a garment and then remoistened to a moisture content of above
Claim 12
Dependent Claim
13 words
The process of claim 1, wherein the fabric is exposed to an atmosphere
Claim 13
Dependent Claim
13 words
The process of claim 1, wherein the fabric is exposed to and atmosphere
Claim 14
Dependent Claim
12 words
The process of claim 1, wherein the fabric is a resinated material.
Claim 15
Dependent Claim
21 words
The process of claim 1, wherein the fabric is substantially immediately exposed to the formaldehyde vapors after being impregnated with the
Claim 16
Dependent Claim
117 words
A durable-press process for cellulosic fiber-containing fabrics, comprising: impregnating a cellulosic fiber-containing fabric with an aqueous solution containing a water soluble, normally solid acid or acid salt catalyst capable of catalyzing the cross-linking reaction between formaldehyde and cellulose to provide from about 1.0 to 6.5 percent by weight of said catalyst and at least about 60 percent by weight of water in said fabric, based on the dry weight of the fabric, then exposing said fabric while containing said amount of water to formaldehyde vapors and curing at a temperature in the range of about 240°F. to 275°F. to cause cross-linking between the cellulose and formaldehyde while the fibers are in a swollen state to thereby improve
Claim 17
Dependent Claim
117 words
A durable-press process for cellulosic fiber-containing fabrics, comprising: impregnating a cellulosic fiber-containing fabric with an aqueous solution containing a water soluble, normally solid acid or acid salt catalyst capable of catalyzing the cross-linking reaction between formaldehyde and cellulose to provide from about 1.0 to 6.5 percent by weight of said catalyst and at least about 60 percent by weight of water in said fabric, based on the dry weight of the fabric, then exposing said fabric while containing said amount of water to formaldehyde vapors and curing at a temperature in the range of about 240°F. to 275°F. to cause cross-linking between the cellulose and formaldehyde while the fibers are in a swollen state to thereby improve
Claim 18
Dependent Claim
11 words
The process of claim 17, wherein the fabric is continuously conveyed
Claim 19
Dependent Claim
13 words
The process of claim 4, wherein the fabric is exposed to an atmosphere
Claim 20
Dependent Claim
21 words
The process of claim 19, wherein the fabric contains from about 5.0 to about 6.0 percent by weight of said catalyst.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |