Patent US5966096A successfully refreshed from Google Patents.
EP0080274A2
Expired / Lapsed
EP
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Process of melt spinning of a blend of a fibre-forming polymer and an immiscible polymer and melt spun fibres produced by such process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1982-10-28
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Granted: —
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Expires: 2002-10-28
Abstract
Abstract A process of melt spinning a fibre-forming thermopias- tic polymer, more particularly polyethylene terephthalate, polyhexamethylene adipamide or polypropylene, at a minimum wind up speed of 1 kilometre per minute in which there is added to the fibre-forming polymer, between 0.1 % and 10% by weight of another polymer which is immiscible in a melt of the fibre-forming polymer, such other polymer having a particle size of between 0.5 and 3 microns in the melt with the fibre-forming polymer immediately prior to spinning and novel melt spun fibres produced by such a process and in which the other polymer is in the form of microfibrlls.
Inventors
- 👤 Harry Brody
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 15:56
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01F; D01F1/00; D01F1/02; Y; Y10; Y10S; Y10S264/00; Y10S264/29
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A process of melt spinning a fibre-forming thermoplastic polymer at a minimum wind up speed of 1 kilometre per minute characterised in that, before melt spinning, there is added to the fibre-forming polymer, between 0.1% and 10% by weight of another polymer which is immiscible in a melt of the fibre-forming polymer, such other polymer having an average particle size of between 0.5 and 3 microns in the melt with the fibre-forming polymer immediately prior to spinning.
Claim 2
Dependent Claim
77 words
A process of melt spinning a fibre-forming thermoplastic polymer at a minimum wind up speed of 1 kilometre per minute characterised in that, before melt spinning, there is added to the fibre-forming polymer, between 0.1% and 10% by weight of another polymer which is immiscible in a melt of the fibre-forming polymer, such other polymer having an average particle size of between 0.5 and 3 microns in the melt with the fibre-forming polymer immediately prior to spinning.
Claim 3
Dependent Claim
44 words
A process as claimed in Claim 1 characterised further in that the extensional viscosity of the other polymer is such that the molten spheres of the other polymer, in which form it exists immediately prior to melt spinning, deform into microfibrils during melt spinning.
Claim 4
Dependent Claim
20 words
A process of melt spinning polyethylene terephthalate, polyhexamethylene adipamide or polypropylene as claimed in either Claim 1 or Claim 2.
Claim 5
Dependent Claim
25 words
A process of melt spinning polyethylene terephthalate as claimed in Claim 3 characterised in that the additive polymer is polyethylene, polyethylene glycol or polyhexamethylene adipamide.
Claim 6
Dependent Claim
20 words
A process of melt spinning polyhexamethylene adipamide as claimed in Claim 3 characterised in that the additive polymer is polyethylene.
Claim 7
Dependent Claim
20 words
A process of melt spinning polypropylene as claimed in Claim 3 characterised in that the additive polymer is polyhexamethylene adipamide.
Claim 8
Dependent Claim
37 words
Melt spun fibres of a fibre-forming thermoplastic polymer containing between 0.1% and 10% by weight of another polymer which is immiscible in a melt of the fibre-forming polymer, such other polymer being in the form of microfibrils.
Claim 9
Dependent Claim
37 words
Melt spun fibres of a fibre-forming thermoplastic polymer containing between 0.1% and 10% by weight of another polymer which is immiscible in a melt of the fibre-forming polymer, such other polymer being in the form of microfibrils.
Claim 10
Dependent Claim
14 words
Rough-surfaced fibres of polyethylene terephthalate, polyhexamethylene adipamide or polypropylene as claimed in Claim 7.
Claim 11
Dependent Claim
18 words
Melt spun fibres produced by a process as claimed in any one of Claims 4, 5 or 6.
References Cited (Backward Citations)
No citation records indexed.
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