GB1179615A - Producing Conjugate Filaments by Melt Extrusion - Google Patents
Producing Conjugate Filaments by Melt ExtrusionInfo
- Publication number
- GB1179615A GB1179615A GB5531167A GB5531167A GB1179615A GB 1179615 A GB1179615 A GB 1179615A GB 5531167 A GB5531167 A GB 5531167A GB 5531167 A GB5531167 A GB 5531167A GB 1179615 A GB1179615 A GB 1179615A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conjugate
- filaments
- polyester
- viscosity
- stream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Multicomponent Fibers (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
1,179,615. Melt spinning conjugate filaments. IMPERIAL CHEMICAL INDUSTRIES Ltd. 28 Nov., 1968 [5 Dec., 1967], No. 55311/67. Heading B5B. Conjugate filaments (which may be of the " side-by-side " or of the " sheath-core " type) are made by a process wherein the conjugate components result from the splitting of a single stream of a molten, fibre-forming polymer into individually metered sub-streams, modifying at least one of the sub-streams by incorporation into it of a metered proportion of a compound in the liquid state, said compound being capable under the conditions of melt extrusion of altering the melt viscosity of the polymer by reaction with it, thereafter bringing together the separate sub-streams to form at least one conjugate stream, and converting the conjugate stream or streams into conjugate filaments. The fibre-forming polymer may be a polyester and the liquid metered into one of the substreams of molten polyester may be a reactant capable under the conditions of melt extrusion of lowering the molecular weight and therefore the melt viscosity of the polyester. The polyester may be poly (ethylene terephthalate). The conversion of the conjugate stream into conjugate filaments may be effected by feeding the stream to a multi-hole spinneret adapted for the spinning of conjugate filaments or by feeding the stream to a straight or annular extrusion slot with production of a conjugate film which is thereafter slit to form conjugate filaments. The reactant used when the fibre-forming polymer is a polyester may be a glycol, a polyglycol, bis- #-hydroxy alkyl terephthalate, or an oligomer, which may be that of the polyester or of a second polyester. The reactant should preferably have a molecular weight of at least 500. When the filaments to be produced are crimped filaments the difference between the intrinsic viscosities of the polyesters in the two streams should be at least 0À05 units of intrinsic viscosity, this viscosity being defined as limit where C is concentration in grams per decilitre, # is the viscosity of the solution of the polymer and # 0 is the viscosity of the pure solvent, viscosity determinations being carried out in orthochlorophenol solution at 25‹ C. The normal melt-spinning temperature is about 280- 300‹ C. Conjugate filaments may be produced in which crimp is developed merely on subjecting them to the normal drawing stage or in which the crimp is enhanced or wholly developed during a heat treatment subsequent to the drawing stage.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5531167A GB1179615A (en) | 1967-12-05 | 1967-12-05 | Producing Conjugate Filaments by Melt Extrusion |
NL6817305A NL6817305A (en) | 1967-12-05 | 1968-12-03 | |
FR1594124D FR1594124A (en) | 1967-12-05 | 1968-12-05 | |
DE19681812996 DE1812996A1 (en) | 1967-12-05 | 1968-12-05 | Composite filaments esp from polyesters of different |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5531167A GB1179615A (en) | 1967-12-05 | 1967-12-05 | Producing Conjugate Filaments by Melt Extrusion |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1179615A true GB1179615A (en) | 1970-01-28 |
Family
ID=10473540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5531167A Expired GB1179615A (en) | 1967-12-05 | 1967-12-05 | Producing Conjugate Filaments by Melt Extrusion |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1812996A1 (en) |
FR (1) | FR1594124A (en) |
GB (1) | GB1179615A (en) |
NL (1) | NL6817305A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4867925A (en) * | 1985-04-04 | 1989-09-19 | Akzo N.V. | Process for the manufacture of polyester industrial yarn |
US5762734A (en) * | 1996-08-30 | 1998-06-09 | Kimberly-Clark Worldwide, Inc. | Process of making fibers |
-
1967
- 1967-12-05 GB GB5531167A patent/GB1179615A/en not_active Expired
-
1968
- 1968-12-03 NL NL6817305A patent/NL6817305A/xx unknown
- 1968-12-05 DE DE19681812996 patent/DE1812996A1/en active Pending
- 1968-12-05 FR FR1594124D patent/FR1594124A/fr not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4867925A (en) * | 1985-04-04 | 1989-09-19 | Akzo N.V. | Process for the manufacture of polyester industrial yarn |
US5092381A (en) * | 1985-04-04 | 1992-03-03 | Akzo N.V. | Polyester industrial yarn and elastomeric objects reinforced with said yarn |
US5762734A (en) * | 1996-08-30 | 1998-06-09 | Kimberly-Clark Worldwide, Inc. | Process of making fibers |
Also Published As
Publication number | Publication date |
---|---|
FR1594124A (en) | 1970-06-01 |
NL6817305A (en) | 1969-06-09 |
DE1812996A1 (en) | 1969-07-03 |
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