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US4023927A
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US
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Textile cleaning process
Assignee: Celanese Corp
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Filing: 1975-05-08
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Granted: 1977-05-17
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Expires: 1995-05-08
Abstract
Abstract A dry cleaning process is provided which is effective for preventing wet-soil redeposition and improving stain-release characteristics of polyester textile material. The process advantages are accomplished by a dry cleaning solvent system contaning hydroxypropyl methyl cellulose as an anti-soiling agent.
Inventors
- 👤 Alex S. Forschirm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:39
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0036; D; D06; D06L; D06L1/00; D06L1/02; D06L1/04; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/05; D06M15/09; D06M23/00; D06M23/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A process for preventing wet-soil redeposition and improving stain-release characteristics of polyester textile material which comprises incorporating into the polyester textile material between about 0.0001 and 10 weight percent of hydroxypropyl methyl cellulose based on the weight of polyester fiber in the textile material, by contacting the said textile material with a dry cleaning solvent containing between about 10 - 7 and 1.0 weight percent hydroxypropyl methyl cellulose and between about 0.1 and 1.5 weight percent water, based on the total weight of dry cleaning solvent, prior to the time said textile material is wet laundered.
Claim 2
Dependent Claim
96 words
A process for preventing wet-soil redeposition and improving stain-release characteristics of polyester textile material which comprises incorporating into the polyester textile material between about 0.0001 and 10 weight percent of hydroxypropyl methyl cellulose based on the weight of polyester fiber in the textile material, by contacting the said textile material with a dry cleaning solvent containing between about 10 - 7 and 1.0 weight percent hydroxypropyl methyl cellulose and between about 0.1 and 1.5 weight percent water, based on the total weight of dry cleaning solvent, prior to the time said textile material is wet laundered.
Claim 3
Dependent Claim
36 words
A process in accordance with claim 1 wherein between about 0.1 and 2 weight percent hydroxypropyl methyl cellulose is incorporated into the polyester textile material, based on the weight of polyester fiber in the textile material.
Claim 4
Dependent Claim
15 words
A process in accordance with claim 1 wherein the polyester textile material is poly(ethylene terephthalate).
Claim 5
Dependent Claim
14 words
A process in accordance with claim 1 wherein the dry cleaning solvent is perchloroethylene.
Claim 6
Dependent Claim
43 words
A textile cleaning process which comprises in a first step treating the textile material with a dry cleaning solvent in accordance with the process of claim 1, and in a second step subjecting the dry cleaned textile material to a wet laundering cycle.
References Cited (Backward Citations)
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Cited
US3473175A
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US3715186A
Cited
GB1314897A
Cited
US3707508A
Cited
US3668000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |