US4042737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing crimped metal-coated filamentary materials, and yarns and fabrics obtained therefrom
Assignee: Rohm and Haas Co
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Filing: 1975-04-01
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Granted: 1977-08-16
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Expires: 1995-04-01
Abstract
Abstract Process for the production of a crimped metal-coated continuous-filament or a crimped yarn of a plurality of metal-coated filaments which filament or yarn is adapted for combination with other filaments to form an improved yarn for use in making anti-static fabrics, such as pile carpets or the like, wherein the continuous-filament or yarn comprising a plurality of filaments is first made into a knitted fabric, the fabric is treated to deposit a continuous metal coating on the filament or yarn thereof, and the coated fabric thus obtained is deknitted, thereby yielding the metal-coated continuous-filament or yarn in a crimped disposition characteristic of the knitted loop construction existing in the knit fabric. Heat treatment of the crimped filament or yarn after the metal-coating step significantly improves its anti-static properties when incorporated into fabric.
Inventors
- 👤 Klane F. Forsgren
- 👤 Sidney Melamed
- 👤 Robert S. Weiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:29
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/002; D06; D06M; D06M11/00; D06M11/83; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23957; Y10T428/23986; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/2958; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
128 words
A process for producing a textured multi-filament yarn suitable for use in the production of textiles having an enhanced resistance to the accumulation of electrostatic charges, said process comprising: knitting a continuous filamentary material, suitable for use in carpet fiber or carpet yarn, to form a knitted fabric therefrom, depositing an electrically conductive oxidatively stable and non-toxic metal coating on said knitted fabric, deknitting the coated fabric to provide a textured, coated filamentary material, and incorporating said textured, coated filamentary material in a textured multifilament yarn, and wherein, after the metal coating step, the knitted fabric, deknitted filamentary material, or textured multifilament yarn is heat-treated such that shrinkage of the filamentary material according to the Leesona Skein Shrinkage test is no more than 1-5% measured after one hour.
Claim 2
Dependent Claim
128 words
A process for producing a textured multi-filament yarn suitable for use in the production of textiles having an enhanced resistance to the accumulation of electrostatic charges, said process comprising: knitting a continuous filamentary material, suitable for use in carpet fiber or carpet yarn, to form a knitted fabric therefrom, depositing an electrically conductive oxidatively stable and non-toxic metal coating on said knitted fabric, deknitting the coated fabric to provide a textured, coated filamentary material, and incorporating said textured, coated filamentary material in a textured multifilament yarn, and wherein, after the metal coating step, the knitted fabric, deknitted filamentary material, or textured multifilament yarn is heat-treated such that shrinkage of the filamentary material according to the Leesona Skein Shrinkage test is no more than 1-5% measured after one hour.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said metal coated filamentary material is heat-treated after knitting and before incorporating in said multifilament yarn.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein said filamentary material is continuous nylon filament and said metal coating is silver.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein said coated filamentary material is heat-treated after deknitting.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein said coated filamentary material is heat-treated at about 230°-270° F. for about 30-120 minutes.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein said filamentary material is continuous nylon filament and said metal coating is silver.
Claim 8
Dependent Claim
21 words
The process of claim 5 wherein said coating is deposited by reducing an aqueous solution of a silver salt with formaldehyde.
Claim 9
Dependent Claim
28 words
The process of claim 5 wherein said filamentary nylon is sensitized by treatment thereof with a solution of a tin salt before the depositon thereon of said coating.
Claim 10
Dependent Claim
31 words
A textured multifilament yarn, suitable for use in the manufacture of textiles having an enhanced resistance to the accumulation of electrostatic charge, produced in accordance with the process of claim 1.
Claim 11
Dependent Claim
31 words
A textured multifilament yarn, suitable for use in the manufacture of textiles having an enhanced resistance to the accumulation of electrostatic charge, produced in accordance with the process of claim 2.
Claim 12
Dependent Claim
31 words
A textured multifilament yarn, suitable for use in the manufacture of textiles having an enhanced resistance to the accumulation of electrostatic charge, produced in accordance with the process of claim 6.
Claim 13
Dependent Claim
31 words
A textured multifilament yarn suitable for use in the manufacture of textiles having an enhanced resistance to the accumulation of electrostatic charge, produced in accordance with the process of claim 3.
Claim 14
Dependent Claim
35 words
In a carpet characterized by a static electrical buildup of substantially less than 10,000 volts, the improvement comprising forming at least a portion of the pile thereof with the textured multifilament yarn of claim 9.
Claim 15
Dependent Claim
35 words
In a carpet characterized by a static electrical buildup of substantially less than 10,000 volts, the improvement comprising forming at least a portion of the pile thereof with the textured multifilament yarn of claim 10.
Claim 16
Dependent Claim
35 words
In a carpet characterized by a static electrical buildup of substantially less than 10,000 volts, the improvement comprising forming at least a portion of the pile thereof with the textured multifilament yarn of claim 11.
Claim 17
Dependent Claim
35 words
In a carpet characterized by a static electrical buildup of substantially less than 10,000 volts, the improvement comprising forming at least a portion of the pile thereof with the textured multifilament yarn of claim 12.
References Cited (Backward Citations)
GB396219A
Cited
US2907678A
Cited
US3438106A
Cited
US3582445A
Cited
US3582448A
Cited
US3666550A
Cited
US3686019A
Cited
US3792520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |