EP0007725A1 - Spun-like yarn with variable denier filaments and process for making such a yarn - Google Patents
Spun-like yarn with variable denier filaments and process for making such a yarn Download PDFInfo
- Publication number
- EP0007725A1 EP0007725A1 EP79301304A EP79301304A EP0007725A1 EP 0007725 A1 EP0007725 A1 EP 0007725A1 EP 79301304 A EP79301304 A EP 79301304A EP 79301304 A EP79301304 A EP 79301304A EP 0007725 A1 EP0007725 A1 EP 0007725A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- filaments
- values
- regions
- large values
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 238000009987 spinning Methods 0.000 description 5
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
-
- 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
- D01D5/20—Formation of filaments, threads, or the like with varying denier along their length
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
- D02G1/024—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting with provision for imparting irregular effects to the yarn
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
- D02G1/0246—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting at least some of the filaments being simultaneously broken or cut, e.g. by stretching or abrading
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0286—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist characterised by the use of certain filaments, fibres or yarns
Definitions
- the invention relates to novel processes for making from a yarn consisting of essentially continuous filaments a yarn simulating one spun from staple fibers.
- a process for making a spun-like yarn comprising drawing a feed yarn, the feed yarn comprising a plurality of continuous filaments, each of this plurality of filaments having a cross-sectional area which varies repetitively from small values in thin regions to large values in thick regions along its length, the large values being at least 25% greater than the small values, the thick and thin regions being out of phase from filament to filament along the length of the yarn, the filaments being repeatedly broken to provide broken ends primarily in the thin regions, the broken ends protruding from the bundle.
- the yarn is false-twisted while being drawn.
- the yarn is false-twisted and heat-set while being drawn.
- the average distance between consecutive thick portions along each of the filaments is between 2 centimeters and 20 meters, and preferably between 20 centimeters and 5 meters.
- the large area values are at least 100% greater than the small area values, and preferably are between 300% and 500% of the small area values.
- polyester polymer as used herein means fiber-forming polymers at least 85% by weight of which is formable by reacting a dihydric alcohol with terephthalic acid. Polyester typically is formed either by direct esterification of ethylene glycol with terephthalic acid, or by ester interchange between ethylene glycol and dimethylterephthalate.
- FIGURES 1 and 2 illustrate the preferred embodiment of a spinneret design which can be employed for obtaining all aspects of the invention.
- the spinneret includes a large counterbore 20 formed in the upper surface 21 of spinneret plate 22.
- Small counterbore 24 is formed in the bottom of and at one side of large counterbore 20.
- a large capillary 26 extends from the bottom of large counterbore 20 at the side opposite small counterbore 24, and connects the bottom of large counterbore 20 with the lower surface 28 of plate 22.
- Small capillary 30 connects the bottom of counterbore 24 with surface 28.
- Capillaries 26 and 30 are each inclined four degrees from the vertical, and thus have an included angle of eight degrees.
- Counterbore 20 has a diameter of 0.113 inch (2.87 mm.), while counterbore 24 has a diameter of 0.052 inch (1.32 mm.).
- Capillary 26 has a diameter of 0.016 inch (0.396 mm.) and a length of 0.146 inch (3.81 mm.), while capillary 30 has a diameter of 0.009 inch (0.229 mm.) and a length of 0.032 inch (0.813 mm.).
- Land 32 separates capillaries 26 and 30 as they emerge at surface 28, and has a width of 0.0043 inch (0.108 mm.).
- Plate 22 has a thickness of 0.554 inch (14.07 mm.).
- Capillaries 26 and 30 together with counterbore 20 and 24 constitute a combined orifice for spinning various novel and useful filaments according to the invention, as will be more particularly described hereinafter.
- molten polyester polymer of normal textile molecular weight is metered at a temperature of 290°C. through a spinneret having 34 combined orifices as above specifically disclosed.
- the polymer throughput is adjusted to produce filaments of 8 average denier per filament at a spinning speed of 3400 yards per minute, the molten streams being conventionally quenched into filaments by transversely directed quenching air.
- the slower stream attenuates between the points of attachment 38 and the loops of the faster stream become straightened until the faster stream is brought into continuous contact with the slower stream.
- the slower stream attenuates more between the points of first attachment than at the points of first attachment so that the resulting combined stream has a cross- section which is larger at the points of first attachment than in the regions between these points.
- the resulting combined stream is then further attenuated somewhat until it is solidified into a filament 40 by the transverse quench air.
- Each solidified filament 40 has non-round cross-sectional areas which vary repetitively along its length. As illustrated qualitatively in FIGURE 5, when using the above spinning conditions, the filament cross-sectional area repetitively varies at a repetition rate of about one per meter, although this can be varied by modifying the spinning conditions and the geometry of the spinneret passages.
- a multiple orifice spinneret will typically provide somewhat different repetition rates among the several resulting streams and filaments.
- An example of this is qualitatively shown in FIGURE 6, wherein is shown that various orifices produce somewhat different repetition rates as determined by stroboscopic examination of the combined streams just below the spinneret face. The repetition rate is proportional to the stroboscope frequency bringing about apparent cessation (or freezing) of movement of the thick and thin regions of.the filament.
- each filament has a cross-sectional area which varies repetitively from small values in thin regions to large values in thick regions along its length, the large values being at least 25% greater than the small values.
- Improved spun-like effects in the ultimate textured yarn are obtained when the large values are at least 100% greater than the small values, with optimum results when the large values are between 300% and 500% of the small values.
- the above feed yarn is simultaneously draw-textured on a Barmag FK-4 texturing machine, using as the false-twist device a friction aggregate of the type disclosed in Yu U.S. patent 3,973,383, the disclosure of which is incorporated herein by reference.
- the draw ratio is set at 1.60 with a winding speed of 385 ypm (about 350 meters per minute). Both heaters are set at.200°C., with an overfeed to the second heater of 10.47% and an overfeed to the winder of 6.79%.
- the aggregate speed is set such that the yarn tensions just before and just after the aggregate are equal.
- the resulting yarn has numerous filament breaks primarily in the thin regions, the broken ends protruding from the yarn bundle.
- the filaments are broken with considerably more control than those in the patents referred to above, and, because of the variable denier, fabrics made from the. resulting yarns have a much more soft and luxurious hand than those made from prior art yarns with the same average denier per filament. This softness of hand is particularly evident when the cross-sectional areas of the thick portions of the filaments are at least 100% greater than those of the thin portions, and values between 300% and 500% greater are particularly preferred.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
Description
- The invention relates to novel processes for making from a yarn consisting of essentially continuous filaments a yarn simulating one spun from staple fibers.
- It is known to treat certain types of continuous filament yarns by various processes to produce yarns which simulate to some degree yarns spun from staple fibers. Typical prior art processes which break the filaments so as to leave the broken ends protruding from the yarn bundle are Heinrich U.S. patent 3,857,232; Cardinal U.S. patent 3,857,233; and Yasuzuka U.S. patent 3,967,441, the disclosures of which are incorporated herein by reference. Fairley British Specification 971,573 discloses a similar process - wherein the broken filament ends are stated to be entangled within the yarn bundle, rather than protruding from the bundle. In each of these and other known processes wherein filaments are broken, the breakable filaments are substantially uniform from end to end. That is, there is made no provision for preferred locations of breakage along the breakable filaments, and hence, less control of breakage than might be desired.
- According to the present invention, this and other difficulties in the prior art are avoided by using a feed yarn having preferred locations for breakage along the breakable filaments.
- According to a first major aspect of the invention, there is provided a process for making a spun-like yarn comprising drawing a feed yarn, the feed yarn comprising a plurality of continuous filaments, each of this plurality of filaments having a cross-sectional area which varies repetitively from small values in thin regions to large values in thick regions along its length, the large values being at least 25% greater than the small values, the thick and thin regions being out of phase from filament to filament along the length of the yarn, the filaments being repeatedly broken to provide broken ends primarily in the thin regions, the broken ends protruding from the bundle.
- According to another aspect of the invention, the yarn is false-twisted while being drawn.
- According to another aspect of the invention, the yarn is false-twisted and heat-set while being drawn.
- According to another aspect of the invention, the average distance between consecutive thick portions along each of the filaments is between 2 centimeters and 20 meters, and preferably between 20 centimeters and 5 meters.
- According to another aspect of the invention, the large area values are at least 100% greater than the small area values, and preferably are between 300% and 500% of the small area values.
- Other aspects of the invention are in part set forth below and will in part be obvious from the following description taken in connection with the accompanying DRAWINGS wherein:
- FIGURE 1 is a vertical sectional view of the preferred embodiment of a spinneret usable to make the feed yarns according to the invention;
- FIGURE 2 is a bottom plan view of the FIGURE 1 spinneret, looking up;
- FIGURE 3 is a cross-sectional view of a filament according to certain aspects of the invention;
- FIGURE 4 is a side elevation view of the molten streams issuing from the FIGURE 1 spinneret according to certain aspects of the invention;
- FIGURE 5 is a graph illustrating the variation in denier along a representative filament according to certain aspects of the invention; and
- FIGURE 6 is a graph illustrating the distribution of the fluctuations illustrated in FIGURE 4 for a representative multiple orifice spinneret according to certain aspects of the invention.
- The feed yarn for the process invention will be specifically exemplified using polyester polymer, it being understood that certain aspects of the invention are applicable to the class of melt-spinnable polymers generally. "Polyester" as used herein means fiber-forming polymers at least 85% by weight of which is formable by reacting a dihydric alcohol with terephthalic acid. Polyester typically is formed either by direct esterification of ethylene glycol with terephthalic acid, or by ester interchange between ethylene glycol and dimethylterephthalate.
- FIGURES 1 and 2 illustrate the preferred embodiment of a spinneret design which can be employed for obtaining all aspects of the invention. The spinneret includes a
large counterbore 20 formed in theupper surface 21 ofspinneret plate 22.Small counterbore 24 is formed in the bottom of and at one side oflarge counterbore 20. Alarge capillary 26 extends from the bottom oflarge counterbore 20 at the side oppositesmall counterbore 24, and connects the bottom oflarge counterbore 20 with thelower surface 28 ofplate 22.Small capillary 30 connects the bottom ofcounterbore 24 withsurface 28.Capillaries Counterbore 20 has a diameter of 0.113 inch (2.87 mm.), whilecounterbore 24 has a diameter of 0.052 inch (1.32 mm.). Capillary 26 has a diameter of 0.016 inch (0.396 mm.) and a length of 0.146 inch (3.81 mm.), while capillary 30 has a diameter of 0.009 inch (0.229 mm.) and a length of 0.032 inch (0.813 mm.).Land 32 separatescapillaries surface 28, and has a width of 0.0043 inch (0.108 mm.).Plate 22 has a thickness of 0.554 inch (14.07 mm.).Capillaries counterbore - As a specific example, molten polyester polymer of normal textile molecular weight is metered at a temperature of 290°C. through a spinneret having 34 combined orifices as above specifically disclosed. The polymer throughput is adjusted to produce filaments of 8 average denier per filament at a spinning speed of 3400 yards per minute, the molten streams being conventionally quenched into filaments by transversely directed quenching air.
- Under these spinning conditions a remarkable phenomenon occurs, as illustrated in FIGURE 4. Due to the geometry of the spinneret construction, the polymer flowing through the
smaller capillaries 30 has a higher velocity than that flowing through the larger capillaries. The speeds and momenta of the paired streams issuing from each combined orifice and the angle at which the streams converge outside the spinneret are such that theslower streams 34 travel in substantially straight lines after the points at which the paired streams first touch and attach, while each of the smaller and faster of thestreams 36 forms sinuous loops back and forth between successive points ofattachment 38 with its associated larger streams. This action can be readily observed using a stroboscopic light directed onto the streams immediately below thespinneret face 28. As the molten streams accelerate away from the spinneret, the slower stream attenuates between the points ofattachment 38 and the loops of the faster stream become straightened until the faster stream is brought into continuous contact with the slower stream. The slower stream attenuates more between the points of first attachment than at the points of first attachment so that the resulting combined stream has a cross- section which is larger at the points of first attachment than in the regions between these points. The resulting combined stream is then further attenuated somewhat until it is solidified into afilament 40 by the transverse quench air. - Each
solidified filament 40 has non-round cross-sectional areas which vary repetitively along its length. As illustrated qualitatively in FIGURE 5, when using the above spinning conditions, the filament cross-sectional area repetitively varies at a repetition rate of about one per meter, although this can be varied by modifying the spinning conditions and the geometry of the spinneret passages. - Due to minor differences between combined orifices, temperature gradations across the spinneret, and other like deviations from exactly the same treatment for each pair of streams, a multiple orifice spinneret will typically provide somewhat different repetition rates among the several resulting streams and filaments. An example of this is qualitatively shown in FIGURE 6, wherein is shown that various orifices produce somewhat different repetition rates as determined by stroboscopic examination of the combined streams just below the spinneret face. The repetition rate is proportional to the stroboscope frequency bringing about apparent cessation (or freezing) of movement of the thick and thin regions of.the filament. A number of such frequencies are plotted along the horizontal axis of Figure 6, and on the vertical axis are plotted the number of orifices giving filaments wherein such freezing was observed, at each given stroboscope frequency. In the resulting multifilament yarn, each filament has a cross-sectional area which varies repetitively from small values in thin regions to large values in thick regions along its length, the large values being at least 25% greater than the small values. Improved spun-like effects in the ultimate textured yarn are obtained when the large values are at least 100% greater than the small values, with optimum results when the large values are between 300% and 500% of the small values.
- The above feed yarn is simultaneously draw-textured on a Barmag FK-4 texturing machine, using as the false-twist device a friction aggregate of the type disclosed in Yu U.S. patent 3,973,383, the disclosure of which is incorporated herein by reference. The draw ratio is set at 1.60 with a winding speed of 385 ypm (about 350 meters per minute). Both heaters are set at.200°C., with an overfeed to the second heater of 10.47% and an overfeed to the winder of 6.79%. The aggregate speed is set such that the yarn tensions just before and just after the aggregate are equal.
- The resulting yarn has numerous filament breaks primarily in the thin regions, the broken ends protruding from the yarn bundle. The filaments are broken with considerably more control than those in the patents referred to above, and, because of the variable denier, fabrics made from the. resulting yarns have a much more soft and luxurious hand than those made from prior art yarns with the same average denier per filament. This softness of hand is particularly evident when the cross-sectional areas of the thick portions of the filaments are at least 100% greater than those of the thin portions, and values between 300% and 500% greater are particularly preferred.
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US92293778A | 1978-07-10 | 1978-07-10 | |
US922937 | 1978-07-10 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0007725A1 true EP0007725A1 (en) | 1980-02-06 |
EP0007725B1 EP0007725B1 (en) | 1984-08-29 |
EP0007725B2 EP0007725B2 (en) | 1988-11-02 |
Family
ID=25447827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79301304A Expired EP0007725B2 (en) | 1978-07-10 | 1979-07-06 | Spun-like yarn with variable denier filaments and process for making such a yarn |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0007725B2 (en) |
JP (1) | JPS5516990A (en) |
AU (1) | AU528268B2 (en) |
CA (1) | CA1108833A (en) |
DE (1) | DE2967197D1 (en) |
ES (1) | ES482359A1 (en) |
IL (1) | IL57811A0 (en) |
ZA (1) | ZA793442B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0067557A2 (en) * | 1981-06-12 | 1982-12-22 | Celanese Corporation | Spinneret and melt spinning process |
US4562029A (en) * | 1980-06-06 | 1985-12-31 | Celanese Corporation | Self-crimping polyester yarn |
US4720314A (en) * | 1980-06-06 | 1988-01-19 | Celanese Corporation | Process for producing self-crimping polyester yarn |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4364998A (en) * | 1981-07-20 | 1982-12-21 | E. I. Du Pont De Nemours And Company | Spunlike yarns |
JPS60224808A (en) * | 1984-04-16 | 1985-11-09 | Teijin Ltd | Manufacture of bulky composite yarn |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB971573A (en) * | 1962-08-14 | 1964-09-30 | British Nylon Spinners Ltd | Improvements in or relating to the manufacture of bulked yarns |
US4000960A (en) * | 1972-08-04 | 1977-01-04 | Mitsubishi Rayon Co., Ltd. | Apparatus for manufacturing synthetic tow for stretch-cut spinning process |
US4059950A (en) * | 1975-12-11 | 1977-11-29 | Toray Industries, Inc. | Multifilament yarn having novel configuration and a method for producing the same |
US4084622A (en) * | 1975-06-11 | 1978-04-18 | Toray Industries Inc. | Textured polyester yarns and process for the production thereof |
-
1979
- 1979-07-06 EP EP79301304A patent/EP0007725B2/en not_active Expired
- 1979-07-06 DE DE7979301304T patent/DE2967197D1/en not_active Expired
- 1979-07-09 AU AU48776/79A patent/AU528268B2/en not_active Ceased
- 1979-07-09 CA CA331,411A patent/CA1108833A/en not_active Expired
- 1979-07-09 JP JP8737579A patent/JPS5516990A/en active Granted
- 1979-07-10 ZA ZA793442A patent/ZA793442B/en unknown
- 1979-07-10 ES ES482359A patent/ES482359A1/en not_active Expired
- 1979-07-16 IL IL57811A patent/IL57811A0/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB971573A (en) * | 1962-08-14 | 1964-09-30 | British Nylon Spinners Ltd | Improvements in or relating to the manufacture of bulked yarns |
US4000960A (en) * | 1972-08-04 | 1977-01-04 | Mitsubishi Rayon Co., Ltd. | Apparatus for manufacturing synthetic tow for stretch-cut spinning process |
US4084622A (en) * | 1975-06-11 | 1978-04-18 | Toray Industries Inc. | Textured polyester yarns and process for the production thereof |
US4059950A (en) * | 1975-12-11 | 1977-11-29 | Toray Industries, Inc. | Multifilament yarn having novel configuration and a method for producing the same |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4562029A (en) * | 1980-06-06 | 1985-12-31 | Celanese Corporation | Self-crimping polyester yarn |
US4720314A (en) * | 1980-06-06 | 1988-01-19 | Celanese Corporation | Process for producing self-crimping polyester yarn |
EP0067557A2 (en) * | 1981-06-12 | 1982-12-22 | Celanese Corporation | Spinneret and melt spinning process |
EP0067557A3 (en) * | 1981-06-12 | 1984-03-28 | Celanese Corporation | Spinneret and melt spinning process |
Also Published As
Publication number | Publication date |
---|---|
DE2967197D1 (en) | 1984-10-04 |
IL57811A0 (en) | 1979-11-30 |
AU4877679A (en) | 1980-01-17 |
ZA793442B (en) | 1980-11-26 |
EP0007725B2 (en) | 1988-11-02 |
ES482359A1 (en) | 1980-04-01 |
AU528268B2 (en) | 1983-04-21 |
JPS6330403B2 (en) | 1988-06-17 |
CA1108833A (en) | 1981-09-15 |
EP0007725B1 (en) | 1984-08-29 |
JPS5516990A (en) | 1980-02-06 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
Designated state(s): BE CH DE FR GB IT NL |
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17P | Request for examination filed | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FIBER INDUSTRIES, INC. |
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ITF | It: translation for a ep patent filed | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CELANESE CORPORATION |
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GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
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AK | Designated contracting states |
Designated state(s): BE CH DE FR GB IT NL |
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