EP0088744A2
Expired / Lapsed
EP
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Easily splittable conjugate filament
Assignee: Monsanto Co
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Filing: 1983-03-04
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Granted: —
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Expires: 2003-03-04
Abstract
Abstract An easily splittable conjugate filament is melt-spun by merging molten sub-streams of incompatible polymers outside the spinneret to form a combined stream, then quenching the combined stream to form the conjugate filament.
Inventors
- 👤 James Ernest Bromley
- 👤 Jing-Peir Yu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 19:57
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/32; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
73 words
A process for melt-spinning an easily splittable conjugate filament from first and second incompatible polymers, comprising: a. generating first and second molten sub-streams of said first and second polymers converging to merge side-by-side as a combined stream no sooner than substantially coincident with extrusion from the face of a spinneret; b. quenching said combined stream to form a conjugate filament; c. withdrawing said filament from said combined stream at a predetermined spinning speed.
Claim 2
Dependent Claim
73 words
A process for melt-spinning an easily splittable conjugate filament from first and second incompatible polymers, comprising: a. generating first and second molten sub-streams of said first and second polymers converging to merge side-by-side as a combined stream no sooner than substantially coincident with extrusion from the face of a spinneret; b. quenching said combined stream to form a conjugate filament; c. withdrawing said filament from said combined stream at a predetermined spinning speed.
Claim 3
Dependent Claim
13 words
The process defined in claim 1, wherein said sub-streams merge below said face.
Claim 4
Dependent Claim
22 words
The process defined in claims 1 or 2, wherein said first sub-stream is a polyamide and said s.econd sub-stream is a polyester.
Claim 5
Dependent Claim
22 words
The process defined in claims 1 or 2, wherein said first sub-stream is nylon 66 and said second sub-stream is poly(ethylene terephthalate).
Claim 6
Dependent Claim
21 words
The process defined in claims 1 or 2, wherein said sub-streams have substantially the same speed upon extrusion from said face.
Claim 7
Dependent Claim
27 words
The process defined in claims 1 or 2, wherein one of said sub-streams has a speed at least twice the speed of the other of said sub-streams.
Claim 8
Dependent Claim
15 words
The process defined in claim 2, wherein said spinning speed is greater than 1000 YPM.
Claim 9
Dependent Claim
15 words
The process defined in claim 7, wherein said spinning speed is greater than 2500 YPM.
Claim 10
Dependent Claim
43 words
A conjugate filament comprising thermoplastic sub-filaments temporarily adhering side-by-side along the' length of said conjugate filament, the adhesion between said sub-filaments being sufficiently light that said conjugate filament splits substantially completely into said sub-filaments upon exposure to boiling water while under no tension.
Claim 11
Dependent Claim
43 words
A conjugate filament comprising thermoplastic sub-filaments temporarily adhering side-by-side along the' length of said conjugate filament, the adhesion between said sub-filaments being sufficiently light that said conjugate filament splits substantially completely into said sub-filaments upon exposure to boiling water while under no tension.
Claim 12
Dependent Claim
23 words
The filament defined in claim 9, wherein one of said sub-filaments is nylon 66 and the other of said sub-filaments is poly(ethylene terephthalate).
Claim 13
Dependent Claim
17 words
The filament defined in claim 9, wherein said filament has a substantially uniform denier along its length.
Claim 14
Dependent Claim
17 words
The filament defined in claim 9, wherein said filament has a substantially variable denier along its length.
References Cited (Backward Citations)
No citation records indexed.
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