CA1313753C - Process for pre-entangling a synthetic multifilament feed yarn and a yarn produced by the process - Google Patents
Process for pre-entangling a synthetic multifilament feed yarn and a yarn produced by the processInfo
- Publication number
- CA1313753C CA1313753C CA000572098A CA572098A CA1313753C CA 1313753 C CA1313753 C CA 1313753C CA 000572098 A CA000572098 A CA 000572098A CA 572098 A CA572098 A CA 572098A CA 1313753 C CA1313753 C CA 1313753C
- Authority
- CA
- Canada
- Prior art keywords
- yarn
- entangling
- entanglement
- bar
- texturing
- 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 - Fee Related
Links
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
- 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
-
- 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
- D02G1/20—Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Woven Fabrics (AREA)
Abstract
Abstract In a process for pre-entangling a synthetic multifilament yarn, the yarn is entangled under 0.5 to 3.0 bar preliminary to entry into the drawing, tex-turing and/or draw-texturing zone in such a way that satisfactory further processing to give a textile sheetlike structure free of markings is possible without a further entangling step after the texturing or drawing process.
(Figure 1)
(Figure 1)
Description
YISCOSUISSE 13137~3 CA 8793 The invention relates to a process for pre-entangling an undra~n or partially drawn (LOY, MOY, POY, FOY) synthetic multifilament feed yarn for the draw;ng, the texturing and/or the draw-texturing process for the production of a textured or smooth yarn for textile sheet-like structures and to the yarn produced by the process.
Trouble-free unwinding in the further processing of mu~tifilament synthetic yarn requires adequate yarn cohesion. Proven ways of producing multifilament yarns of adequate cohesion are twisting and sizing. However, both the methods are very demanding ;n terms of machine and transport resource requirements.
The intention of producing a usable yarn cohe-sion was also behind the development of aerodynamic pro-cesses in which the yarn, which is under a defined ten-sion, is entangled by means of compressed air from a jet.
This operation takes place after the texturing or draw-ing process.
EP-A-0,137,088 discloses an entanglement process whereby an undrawn or partially drawn feed yarn, for a false twist texturing process, ;s slightly entangled under an air pressure of about 0.5 bar in order not to disturb the actual texturing process with overly inten-sive sites of entanglement in the form of knobs. The knobs produced in the feed yarn must disappear again in the further processing of the yarns in order to avoid flaws. The object of the known process is to reduce the 13137~3 number of broken ends, in particular in the case of the finely fibrillate yarns. After texturing, these yarns then have to be entangled again, the resulting cohesion of the textured yarn having the same function as ~ith S the feed yarn, namely to improve and/or guarantee fur-ther processabil;ty. Ho~ever, the entangle~ent sites produced in the kno~n process have the disadvantage that they intertere ~ith the uniformity of the appearance of the final fabric, in particular in the case of fine 1Q deniers. It has hitherto not been possible to produce ~oven fabrics from textured yarns which are sufficiently entangled to give satisfactory un~inding ~ithout these ~oven fabrics having an unlevel appearance.
It is an object of the present invention to pro-vide a process ~hich ensures good yarn cohesion in a textured or dra~n filament yarn and ~hich, in the fur-ther processing of said yarn, guarantees trouble-free un~inding and makes it possible to produce a textile sheetlike structure ~hich ideally is free of markings.
This object is achieved according to the inven-tion ~hen the entangR ng takes place under an air pressure of ~.S to 3.0 bar preliminary to entry of the feed yarn into the drawing, texturing and/or dra~-texturing zone.
It has been possible, surprisingly, to increase the intensity of feed yarn entanglement in such a ~ay that, on the one hand, the texturing process is not interferred ~ith and, on the other, the textured yarn - 3 - CA 87g3 1~13~3 is given the requisite cohes;on for further processing without a further entangling process. This is also true for kno~n dra~ing processes ~here the feed yarns are drawn into smooth yarns. In the pre-entanglement according to the ;nvention, the entangling takes place preliminary to entry of the yarn into the texturing means and under an air pressure ~ithin the jet of about 0.5 to 3.0 bar, in particular of 1.0 to 2.5 bar, preferably of 1.5 to 2.0 bar.
It is advantageous and surprising that the pre- -entangled yarn, which may be not only a textured yarn but also a smooth yarn, shows a "continuous" entangle-ment characteristic. The term "continuous" entanglement as used herein covers a form of entanglement wh;ch has no pronounced entanglement sites, unlike existing en-tanglement processes for which distinctly visible knobs at period;c intervals are typica(.
~ ithin the preferred pressure range the number of snar~s likewise is at a minimum of about 80 snarls per 100,000 m of yarn length and produces a woven fabric without markings. Snarls are to be understood as mean-ing broken filaments and/or yarn elements protruding from the core of the yarn. The snarls were measured with a measuring head from TORAY, which orks in accor-dance ~ith the electro-optical principle. The test speed ~as 1,û00 m/min, and the length of yarn tested per variant was 1.6 x 105 m.
_ 4 - CA 8793 13137~3 The invention ~ill be further illustrated by reference to examples.
Example 1 The feed yarn-used ~as a POY polyester yarn having a nominal count of dtex 100 f 7Z. The most sui-table entanglement jets are enclosed t~o-hole jets, having for example an air passage diameter of 0.7 mm.
Ho~ever, it is also possible to use other commercia~y available entanglement jets ~hich guar\antee a constant pressure ~ithin the claimed range. The entanglement vas follo~ed by texturing at 500 mlmin on an FK6-CF textur-;ng machine from GARMAG AG.
For each variant, 8 packages of 1.8 kg each vere produced. The test results are sho~n in the table belo~.
~n the tables: cm = tenacity x~elongationi 1313~3 Table 1 Entanglement Unentangled Pre-entangled Conventional~r I I entangled Air pressure bar _ 0.5 1 0 1.5 2.0 2.5 2.5 inear densi~y-dtex 105.6 103.5 ~ l04.0 104.0 103.6103.2 Elongat;on X 24.5 24.2 23.8 26.7 26.7 27.0 27.6 Tenacity cN/
¦ tex 31.6 32.2 ~ 33.0 33.3 33.6 34.4 cm 156.4 158.4 157.1 170.5 172.1 174.6 180.7 Entanglement Knlm 21.0 30.0 39 0 51.0 51.0 65.0 87.0 Snarls/100,000 m 1 422.0 235.0 110.0 84.0 80.0 128.0 340.0 Broken endsl ¦ 100,000 m 4.6 0.5 0.34 0 0 0 0 The degree of entanglement ;ncreases continuously from a base value of 21 knobs/m, ;n the case of a yarn textured ~;thout entangling means, to 65 knobs/m at an a;r pressure of 2.5 bar. It ;s essent;al for further process;ng and ;t is surprising that the number of knobs is far lo~er than in a yarn conventionally entangled at Z.5 bar ~;thout deter;oration in unw;nd;ng. In the case of the variant referred to as conventional~y entangled, the entangling ;s effected in a conventional manner following texturing and before winding up.
131~7~3 Example 2 The feed yarn used ~as a POY polyester yarn hav-ing a nominal count of dtex 167 f 36 octolobal which was processed by the process according to the invention. The test results are sho~n in Table 2. The same trends were found in unwinding properties, the number of knobs and fabric appearance.
Table 2 \
. .
Entanglement Pre-entangled Conven-¦
l i tional Air pressure bar 0 1.0 1.5 2.0 2.5 2.1 Linear density dtex 176.0 176.0 176.0 176.0 177.0180.0 Elongation X 27.5 27.5 27.5 27.5 27.527.5 Tenacity cN/
tex 34 5 34.5 34.5 34.5 34.433.7 _ ,.
cm _ _ 180.9 _ _176.7 Texturmat crimping X 39.6 39.8 39.0 39.6 39.433.4 Crimp ¦ stabili_y X 184.9 84.4 84.1 84.8 84.277.6 Entanglement Knlm 15.6 29.0 29.4 _ 31.232.877.7 Broken ends/
1 100,000 m 1 1.3 0.2 _ 0 _ 0 .
- 7 - CA 87~3 13137~3 A summary of the examples is further illustrated in the drawings, ~here figure 1 sho~s a comparison bet~een the results measured for the entanglement according to the invention S and the prior art, Figure 2 shows a fabric comprising an unentang~ed yarn, Figure 3 shows a fabric produced by pre-entang~ement ac-cording to the invention under an air pressure of 2.5 bar, 1û Figure 4 sho~s a fabric produced by conventional entang~e-ment under an air pressure of 2.5 bar, and Figure 5 sho~s a variant of the measured results obtained from a different linear density than in Figure 1.
Figure 1 shows the essential difference bet~een a non-entangled yarn 1, a yarn 2 entangled under 2.5 bar according to the invention and a yarn 3 conventional~y entang~ed under 2.5 bar in terms of the measurements recorded on a yarn thickness measuring instrument. The measurements ~ere carried out on an entangeLement measur-ing instrument of type KMG-4 from VISCOSUISSE SA.
The fabric obtained according to Figure 2 from an un-entangled yarn is free of marking. Ho~ever, very poor un~inding during ~eft insertion (in ~eaving) on account of the frequent yarn breakages makes processing of such a - 25 yarn an uneconomical proposition.
Figure 3 sho~s the fabric resulting from pre-en-tanglement according to the invention under 2.5 bar. It is true that some entangelement knobs are st1ll visible, but the appearance of the fabric has to be classified as good.
Figure 4 depicts a variant produced by conven-S tional entanglement under 2.5 bar. This fabric is un-usable on account of the very strong marking ~ith en-tanglement knobs.
In a variant according to figure S, the yarn thickness measurement trace shows the typical difference betueen the tvo entanglement processes for a yarn having a nominal count of dtex 167 f 36. Curve 4 represents the pre-entanglement according to the invention, ~hile curve 5 applies to a conventionally entangled yarn.
All the samples sho~n ;n Figures 2 to 4 ~ere ~oven on a gripper projectile ~eaving machine ~ith ~eft insertion at 800 m/min and then dyed and set.
The textured yarn produced by the process accord-ing to the invention results in a satisfactory appearance of the ~oven fabric since it is evidently the case that, in the course of the texturing process, the entanglement sites introduced disappear only to such an extent that the residual entanglement remaining behind comes close to so-called "continuous" entanglement. An advantage of quasi-continuous entanglement is in particular the ~o~ degree of marking in the fabric coupled ~ith a degree of yarn cohesion ~hich is sufficient for satisfactory processing.
Trouble-free unwinding in the further processing of mu~tifilament synthetic yarn requires adequate yarn cohesion. Proven ways of producing multifilament yarns of adequate cohesion are twisting and sizing. However, both the methods are very demanding ;n terms of machine and transport resource requirements.
The intention of producing a usable yarn cohe-sion was also behind the development of aerodynamic pro-cesses in which the yarn, which is under a defined ten-sion, is entangled by means of compressed air from a jet.
This operation takes place after the texturing or draw-ing process.
EP-A-0,137,088 discloses an entanglement process whereby an undrawn or partially drawn feed yarn, for a false twist texturing process, ;s slightly entangled under an air pressure of about 0.5 bar in order not to disturb the actual texturing process with overly inten-sive sites of entanglement in the form of knobs. The knobs produced in the feed yarn must disappear again in the further processing of the yarns in order to avoid flaws. The object of the known process is to reduce the 13137~3 number of broken ends, in particular in the case of the finely fibrillate yarns. After texturing, these yarns then have to be entangled again, the resulting cohesion of the textured yarn having the same function as ~ith S the feed yarn, namely to improve and/or guarantee fur-ther processabil;ty. Ho~ever, the entangle~ent sites produced in the kno~n process have the disadvantage that they intertere ~ith the uniformity of the appearance of the final fabric, in particular in the case of fine 1Q deniers. It has hitherto not been possible to produce ~oven fabrics from textured yarns which are sufficiently entangled to give satisfactory un~inding ~ithout these ~oven fabrics having an unlevel appearance.
It is an object of the present invention to pro-vide a process ~hich ensures good yarn cohesion in a textured or dra~n filament yarn and ~hich, in the fur-ther processing of said yarn, guarantees trouble-free un~inding and makes it possible to produce a textile sheetlike structure ~hich ideally is free of markings.
This object is achieved according to the inven-tion ~hen the entangR ng takes place under an air pressure of ~.S to 3.0 bar preliminary to entry of the feed yarn into the drawing, texturing and/or dra~-texturing zone.
It has been possible, surprisingly, to increase the intensity of feed yarn entanglement in such a ~ay that, on the one hand, the texturing process is not interferred ~ith and, on the other, the textured yarn - 3 - CA 87g3 1~13~3 is given the requisite cohes;on for further processing without a further entangling process. This is also true for kno~n dra~ing processes ~here the feed yarns are drawn into smooth yarns. In the pre-entanglement according to the ;nvention, the entangling takes place preliminary to entry of the yarn into the texturing means and under an air pressure ~ithin the jet of about 0.5 to 3.0 bar, in particular of 1.0 to 2.5 bar, preferably of 1.5 to 2.0 bar.
It is advantageous and surprising that the pre- -entangled yarn, which may be not only a textured yarn but also a smooth yarn, shows a "continuous" entangle-ment characteristic. The term "continuous" entanglement as used herein covers a form of entanglement wh;ch has no pronounced entanglement sites, unlike existing en-tanglement processes for which distinctly visible knobs at period;c intervals are typica(.
~ ithin the preferred pressure range the number of snar~s likewise is at a minimum of about 80 snarls per 100,000 m of yarn length and produces a woven fabric without markings. Snarls are to be understood as mean-ing broken filaments and/or yarn elements protruding from the core of the yarn. The snarls were measured with a measuring head from TORAY, which orks in accor-dance ~ith the electro-optical principle. The test speed ~as 1,û00 m/min, and the length of yarn tested per variant was 1.6 x 105 m.
_ 4 - CA 8793 13137~3 The invention ~ill be further illustrated by reference to examples.
Example 1 The feed yarn-used ~as a POY polyester yarn having a nominal count of dtex 100 f 7Z. The most sui-table entanglement jets are enclosed t~o-hole jets, having for example an air passage diameter of 0.7 mm.
Ho~ever, it is also possible to use other commercia~y available entanglement jets ~hich guar\antee a constant pressure ~ithin the claimed range. The entanglement vas follo~ed by texturing at 500 mlmin on an FK6-CF textur-;ng machine from GARMAG AG.
For each variant, 8 packages of 1.8 kg each vere produced. The test results are sho~n in the table belo~.
~n the tables: cm = tenacity x~elongationi 1313~3 Table 1 Entanglement Unentangled Pre-entangled Conventional~r I I entangled Air pressure bar _ 0.5 1 0 1.5 2.0 2.5 2.5 inear densi~y-dtex 105.6 103.5 ~ l04.0 104.0 103.6103.2 Elongat;on X 24.5 24.2 23.8 26.7 26.7 27.0 27.6 Tenacity cN/
¦ tex 31.6 32.2 ~ 33.0 33.3 33.6 34.4 cm 156.4 158.4 157.1 170.5 172.1 174.6 180.7 Entanglement Knlm 21.0 30.0 39 0 51.0 51.0 65.0 87.0 Snarls/100,000 m 1 422.0 235.0 110.0 84.0 80.0 128.0 340.0 Broken endsl ¦ 100,000 m 4.6 0.5 0.34 0 0 0 0 The degree of entanglement ;ncreases continuously from a base value of 21 knobs/m, ;n the case of a yarn textured ~;thout entangling means, to 65 knobs/m at an a;r pressure of 2.5 bar. It ;s essent;al for further process;ng and ;t is surprising that the number of knobs is far lo~er than in a yarn conventionally entangled at Z.5 bar ~;thout deter;oration in unw;nd;ng. In the case of the variant referred to as conventional~y entangled, the entangling ;s effected in a conventional manner following texturing and before winding up.
131~7~3 Example 2 The feed yarn used ~as a POY polyester yarn hav-ing a nominal count of dtex 167 f 36 octolobal which was processed by the process according to the invention. The test results are sho~n in Table 2. The same trends were found in unwinding properties, the number of knobs and fabric appearance.
Table 2 \
. .
Entanglement Pre-entangled Conven-¦
l i tional Air pressure bar 0 1.0 1.5 2.0 2.5 2.1 Linear density dtex 176.0 176.0 176.0 176.0 177.0180.0 Elongation X 27.5 27.5 27.5 27.5 27.527.5 Tenacity cN/
tex 34 5 34.5 34.5 34.5 34.433.7 _ ,.
cm _ _ 180.9 _ _176.7 Texturmat crimping X 39.6 39.8 39.0 39.6 39.433.4 Crimp ¦ stabili_y X 184.9 84.4 84.1 84.8 84.277.6 Entanglement Knlm 15.6 29.0 29.4 _ 31.232.877.7 Broken ends/
1 100,000 m 1 1.3 0.2 _ 0 _ 0 .
- 7 - CA 87~3 13137~3 A summary of the examples is further illustrated in the drawings, ~here figure 1 sho~s a comparison bet~een the results measured for the entanglement according to the invention S and the prior art, Figure 2 shows a fabric comprising an unentang~ed yarn, Figure 3 shows a fabric produced by pre-entang~ement ac-cording to the invention under an air pressure of 2.5 bar, 1û Figure 4 sho~s a fabric produced by conventional entang~e-ment under an air pressure of 2.5 bar, and Figure 5 sho~s a variant of the measured results obtained from a different linear density than in Figure 1.
Figure 1 shows the essential difference bet~een a non-entangled yarn 1, a yarn 2 entangled under 2.5 bar according to the invention and a yarn 3 conventional~y entang~ed under 2.5 bar in terms of the measurements recorded on a yarn thickness measuring instrument. The measurements ~ere carried out on an entangeLement measur-ing instrument of type KMG-4 from VISCOSUISSE SA.
The fabric obtained according to Figure 2 from an un-entangled yarn is free of marking. Ho~ever, very poor un~inding during ~eft insertion (in ~eaving) on account of the frequent yarn breakages makes processing of such a - 25 yarn an uneconomical proposition.
Figure 3 sho~s the fabric resulting from pre-en-tanglement according to the invention under 2.5 bar. It is true that some entangelement knobs are st1ll visible, but the appearance of the fabric has to be classified as good.
Figure 4 depicts a variant produced by conven-S tional entanglement under 2.5 bar. This fabric is un-usable on account of the very strong marking ~ith en-tanglement knobs.
In a variant according to figure S, the yarn thickness measurement trace shows the typical difference betueen the tvo entanglement processes for a yarn having a nominal count of dtex 167 f 36. Curve 4 represents the pre-entanglement according to the invention, ~hile curve 5 applies to a conventionally entangled yarn.
All the samples sho~n ;n Figures 2 to 4 ~ere ~oven on a gripper projectile ~eaving machine ~ith ~eft insertion at 800 m/min and then dyed and set.
The textured yarn produced by the process accord-ing to the invention results in a satisfactory appearance of the ~oven fabric since it is evidently the case that, in the course of the texturing process, the entanglement sites introduced disappear only to such an extent that the residual entanglement remaining behind comes close to so-called "continuous" entanglement. An advantage of quasi-continuous entanglement is in particular the ~o~ degree of marking in the fabric coupled ~ith a degree of yarn cohesion ~hich is sufficient for satisfactory processing.
Claims (2)
1. The method of pre-entangling a partially drawn polyester-(POY) feed yarn for the draw-texturing process for the production of a yarn for textile fabrics, which comprises entangling the feed yarn at an air pressure of 1.0 to 2.0 bar.
2. An air-entangled polyester yarn which exhibits a homogeneously formed entanglement, said yarn having simultaneously less than 85 fluffs per 100,000 meters of yarn and less than 65 knobs per meter, said yarn having been produced at an entangling pressure of 1.0 to 2.0 bar.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH272387 | 1987-07-17 | ||
| CH02723/87-5 | 1987-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1313753C true CA1313753C (en) | 1993-02-23 |
Family
ID=4240156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000572098A Expired - Fee Related CA1313753C (en) | 1987-07-17 | 1988-07-15 | Process for pre-entangling a synthetic multifilament feed yarn and a yarn produced by the process |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0323986B1 (en) |
| JP (1) | JPH02500375A (en) |
| BR (1) | BR8807133A (en) |
| CA (1) | CA1313753C (en) |
| DE (1) | DE3879156D1 (en) |
| WO (1) | WO1989000620A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5518814A (en) * | 1993-07-23 | 1996-05-21 | Hoechst Aktiengesellschaft | Flat multifilament yarn having low opening tendency and good compaction |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI294926B (en) * | 2002-04-25 | 2008-03-21 | Teijin Fibers Ltd | Polyester fine false twisting textured yarn, and methods for producing the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2500229B2 (en) * | 1975-01-04 | 1978-01-19 | Bayer Ag, 5090 Leverkusen | PROCESS FOR SIMULTANEOUS DRAW TEXTURING OF SYNTHETIC YARN |
| EP0150301A2 (en) * | 1983-12-01 | 1985-08-07 | b a r m a g Barmer Maschinenfabrik Aktiengesellschaft | Apparatus for drawing bundles of synthetic yarns |
| EP0223301B1 (en) * | 1985-11-20 | 1990-01-31 | Viscosuisse Sa | Method for producing a weft thread from poy polyester |
-
1988
- 1988-07-08 BR BR888807133A patent/BR8807133A/en not_active Application Discontinuation
- 1988-07-08 DE DE8888905648T patent/DE3879156D1/en not_active Revoked
- 1988-07-08 JP JP50549288A patent/JPH02500375A/en active Pending
- 1988-07-08 WO PCT/CH1988/000121 patent/WO1989000620A1/en not_active Application Discontinuation
- 1988-07-08 EP EP19880905648 patent/EP0323986B1/en not_active Revoked
- 1988-07-15 CA CA000572098A patent/CA1313753C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5518814A (en) * | 1993-07-23 | 1996-05-21 | Hoechst Aktiengesellschaft | Flat multifilament yarn having low opening tendency and good compaction |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0323986A1 (en) | 1989-07-19 |
| JPH02500375A (en) | 1990-02-08 |
| BR8807133A (en) | 1989-10-31 |
| DE3879156D1 (en) | 1993-04-15 |
| EP0323986B1 (en) | 1993-03-10 |
| WO1989000620A1 (en) | 1989-01-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |