Patent US4123492A successfully refreshed from Google Patents.
US4123492A
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US
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Nylon 66 spinning process
Assignee: Monsanto Co
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Filing: 1975-05-22
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Granted: 1978-10-31
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Expires: 1995-05-22
Abstract
Abstract Polyamide yarn is melt spun at high speed and drawn almost immediately (between 0.002 and 0.25 seconds) after solidification. Turbine driven feed roll replaces conventional feed and separator roll. Process displays unusually low drawing tension, exceptionally uniform yarn.
Inventors
- 👤 Michael M. McNamara
- 👤 Wayne T. Mowe
- 👤 Darwyn E. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:23
CPC Classifications
D; D02; D02J; D02J13/00; D02J13/005; D01; D01D; D01D10/00; D01D10/02; D01D5/00; D01D5/12; D01D5/16; D01F; D01F6/00; D01F6/58; D01F6/60; D02J1/00; D02J1/22
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
112 words
A process for producing a yarn from a thermoplastic melt-spinnable polyamide polymer, said process comprising: a. extruding said polymer through a spinneret as a plurality of molten streams into a quench zone wherein the streams are cooled and solidified into spun filaments; b. forwarding said spun filaments with control means comprising a roll for controlling the spinning speed of said filaments by withdrawing said spun filaments from said quench zone at a spinning speed of at least 2285 meters per minute; c. feeding said filaments from said control means into an orientation zone between 0.002 and 0.25 seconds after solidfication of said filaments; and d. stretching said filaments in said orientation zone.
Claim 2
Dependent Claim
112 words
A process for producing a yarn from a thermoplastic melt-spinnable polyamide polymer, said process comprising: a. extruding said polymer through a spinneret as a plurality of molten streams into a quench zone wherein the streams are cooled and solidified into spun filaments; b. forwarding said spun filaments with control means comprising a roll for controlling the spinning speed of said filaments by withdrawing said spun filaments from said quench zone at a spinning speed of at least 2285 meters per minute; c. feeding said filaments from said control means into an orientation zone between 0.002 and 0.25 seconds after solidfication of said filaments; and d. stretching said filaments in said orientation zone.
Claim 3
Dependent Claim
22 words
The process defined in claim 1, wherein said filaments are fed into said orientation zone between 0.01 and 0.12 seconds after solidfication.
Claim 4
Dependent Claim
19 words
The process defined in claim 1, wherein said control means comprises an unpaired roll about which said filaments pass.
Claim 5
Dependent Claim
17 words
The process defined in claim 3 wherein said filaments contact said unpaired roll for less than 360°.
Claim 6
Dependent Claim
17 words
The process defined in claim 3, wherein a substantially constant torque is applied to said unpaired roll.
Claim 7
Dependent Claim
16 words
The process defined in claim 3, wherein said unpaired roll is driven by an air turbine.
Claim 8
Dependent Claim
30 words
The process defined in claim 6, wherein said air turbine applies a torque to said unpaired roll in a direction to oppose driving of said unpaired roll by said yarn.
Claim 9
Dependent Claim
67 words
The process defined in claim 1, further comprising: a. forwarding said filaments from said orientation zone to a heat treatment zone; and b. heating said filaments in said heat treatment zone while under a tension between 0.1 and 1.5 grams per final denier to a yarn temperature between 50° C. and 240° C. for a period of time sufficient to reduce the underdrive to less than 5%.
Claim 10
Dependent Claim
67 words
The process defined in claim 1, further comprising: a. forwarding said filaments from said orientation zone to a heat treatment zone; and b. heating said filaments in said heat treatment zone while under a tension between 0.1 and 1.5 grams per final denier to a temperature between 50° C. and 250° C. for a period of time sufficient to reduce the yarn retraction to less than 1%.
Claim 11
Dependent Claim
36 words
The process defined in claim 1, wherein said polyamide polymer is nylon, 66, and wherein the spinning speed is selected so that a final spun yarn sample has a crystalline orientation Fc of at least 0.78.
Claim 12
Dependent Claim
15 words
The process defined in claim 10, wherein said crystalline orientation Fc is at least 0.85.
Claim 13
Dependent Claim
15 words
The process defined in claim 2, wherein said crystalline orientation Fc is at least 0.85.
Claim 14
Dependent Claim
15 words
The process defined in claim 3, wherein said crystalline orientation Fc is at least 0.85.
Claim 15
Dependent Claim
15 words
The process defined in claim 4, wherein said crystalline orientation Fc is at least 0.85.
Claim 16
Dependent Claim
15 words
The process defined in claim 5, wherein said crystalline orientation Fc is at least 0.85.
Claim 17
Dependent Claim
15 words
The process defined in claim 6, wherein said crystalline orientation Fc is at least 0.85.
Claim 18
Dependent Claim
15 words
The process defined in claim 7, wherein said crystalline orientation Fc is at least 0.85.
Claim 19
Dependent Claim
15 words
The process defined in claim 8, wherein said crystalline orientation Fc is at least 0.85.
Claim 20
Dependent Claim
15 words
The process defined in claim 9, wherein said crystalline orientation Fc is at least 0.85.
Claim 21
Dependent Claim
51 words
The process defined in claim 1, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 22
Dependent Claim
51 words
The process defined in claim 2, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 23
Dependent Claim
51 words
The process defined in claim 3, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 24
Dependent Claim
51 words
The process defined in claim 4, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 25
Dependent Claim
51 words
The process defined in claim 5, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 26
Dependent Claim
51 words
The process defined in claim 6, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 27
Dependent Claim
51 words
The process defined in claim 7, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width so greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 28
Dependent Claim
51 words
The process defined in claim 8, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 29
Dependent Claim
51 words
The process defined in claim 9, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 30
Dependent Claim
51 words
The process defined in claim 10, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 31
Dependent Claim
51 words
The process defined in claim 11, wherein said polyamide polymer is nylon 66, and wherein said spinning speed is selected so that a final spun yarn sample has a crystallite hydrogen bonded sheet width no greater than 85% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 32
Dependent Claim
31 words
The process defined in claim 20, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 33
Dependent Claim
31 words
The process defined in claim 21, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 34
Dependent Claim
31 words
The process defined in claim 22, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 35
Dependent Claim
31 words
The process defined in claim 23, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 36
Dependent Claim
31 words
The process defined in claim 24, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 37
Dependent Claim
31 words
The process defined in claim 25, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 38
Dependent Claim
31 words
The process defined in claim 26, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 39
Dependent Claim
31 words
The process defined in claim 27, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 40
Dependent Claim
31 words
The process defined in claim 28, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
Claim 41
Dependent Claim
31 words
The process defined in claim 29, wherein said crystallite hydrogen bonded sheet width is no greater than 75% of the crystallite hydrogen bonded sheet width of a reference spun yarn sample.
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |