EP0036517B1 - Method of producing highly-shrinkable tows of acrylonitrile polymerisates - Google Patents
Method of producing highly-shrinkable tows of acrylonitrile polymerisates Download PDFInfo
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- EP0036517B1 EP0036517B1 EP81101530A EP81101530A EP0036517B1 EP 0036517 B1 EP0036517 B1 EP 0036517B1 EP 81101530 A EP81101530 A EP 81101530A EP 81101530 A EP81101530 A EP 81101530A EP 0036517 B1 EP0036517 B1 EP 0036517B1
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- Prior art keywords
- acrylonitrile
- shrinkage
- process according
- stretch
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- 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
- D02G1/18—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by combining fibres, filaments, or yarns, having different shrinkage characteristics
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
- D01G1/06—Converting tows to slivers or yarns, e.g. in direct spinning
- D01G1/08—Converting tows to slivers or yarns, e.g. in direct spinning by stretching or abrading
Definitions
- the invention relates to a method for producing a tear pull by conventional spinning, post-treatment and tearing, the individual fibers of which have a cooking shrinkage of at least 35%.
- Yarns made from such single fibers are used in numerous article areas, e.g. B. in velor or fur imitation area used.
- the yarn is produced by spinning single fibers, which are usually obtained by cutting shrinkable fiber strands.
- Such a method is e.g. B. described in DE-OS 2 655 172.
- gentle drying must be carried out at temperatures below 60 ° C., which requires an undesirably long time.
- the object of the present invention was therefore the production of high-shrinkage fibers after a more economical drying process at higher temperatures, with higher strength in the shrinking yarn and the possibility of dyeing smaller batches. It has now surprisingly been found that a saturated steam fixation after stretching and before the tearing process gives a cable which meets these requirements.
- the invention therefore relates to a process for the production of high-shrinkage tears made of acrylonitrile polymers after conventional spinning, stretching and tearing, characterized in that after stretching and before tearing, saturated steam fixation is carried out between 115 and 140 ° C and the tearing at a heating zone delay (HZV ) of at least 30%.
- the steaming time is a maximum of 30 minutes.
- the heating zone of the tearing machine is preferably heated to 120 to 160 ° C.
- a cardiac output of 65% is usually not exceeded when tearing. Reless processing is advantageously carried out at a heating zone temperature of 120 to 150 ° C. and a cardiac output of 40 to 60%.
- Acrylonitrile polymers in the context of the process are polyacrylonitrile or preferably acrylonitrile copolymers with at least 50% by weight of polymerized acrylonitrile.
- Such copolymers contain one or more monomers copolymerizable with acrylonitrile, such as acrylic acid esters, vinyl esters or monomers with dye-affine groups. Dry-spun bundles of threads are preferably used.
- the threads obtained after dry spinning are passed through aqueous baths to extract the residual solvent, being drawn 2 to 6 times, preferably 2 to 3 times.
- the temperature of the aqueous baths is at most 100 ° C., preferably 65 to 75 ° C.
- the stretched threads are dried, as is usual with acrylic cables, by hot air at 140 to 150 ° C after they have been treated with a preparation necessary for further processing.
- the thread bundle is passed through a conventional stuffer box crimp.
- the cable is treated with saturated steam under pressure so that the cable is given the desired shrink height after the tear processing, i.e. the pull.
- a temperature of 115 to 140 ° C is maintained, since damage can occur at higher temperatures, which is reflected in a deterioration of the raw clay and a steaming time that is greater than 30 minutes, also in a reduction in the fineness-related maximum tensile force.
- sufficient shrinkage in the pull is no longer achieved at lower temperatures.
- the cable can be dyed using a foulard by one of the usual methods, such as pack dyeing or padding of the dye, it having no effect on the shrinkage behavior of the zipper, whether spinning or z.
- a coloring of the cable is selected in the bale.
- the dyeing is expediently carried out before the steaming step, because it is known that the dye is fixed by a steaming process.
- the shrinkage that can be achieved in the pull depends on various parameters. It has been found that the higher the comonomer content in the polymer, the lower the stretch ratio when the comonomer content is below 6% by weight, the higher the fixing temperature (saturated steam) and the higher the temperature and the HZV during the tearing process.
- the shrinking force is also important, since the shrinkage must be triggered against the resistance of the non-shrinking or less shrinking fibers. It has been shown that copolymers with a comonomer content between 6 and 10% by weight can be processed into tears with a higher shrinking force than those with a comonomer content between 2 and 6% by weight.
- the cable While supplying spray steam below 1 bar, the cable was crimped in a stuffer box and placed in a perforated can. After treatment with saturated steam at 120 ° C. in an autoclave, the cable was torn on a tearing machine (type Seydel 671 S) at a heating plate temperature of 120 ° C. and a cardiac output of 58%. The following values were found when testing the individual fibers of the tear cable:
- the fibers of the tear pull showed an average cooking shrinkage of 30%, a maximum cooking shrinkage of -36%, and the yarn spun from this yarn showed a cooking shrinkage of 38.7% with a shrinking force (180 ° C. hot air) of 5.9 mN / tex.
- An acrylonitrile polymer of the same composition as in Example 1 was spun by a conventional dry spinning process.
- the fiber bundle still contained 16.4% by weight of the solvent, which was washed out in a washing-stretching process using water at elevated temperature.
- the temperature in the washing tubs was 85 ° C, that in the stretching tubs 95 ° C.
- the speed quotient of the inlet and outlet in the washing-stretching system was 1: 5.0.
- the stretched and washed cable was then given an antistatic finish and was then steamed in a continuous pressure damper (System Tunnel, Serracant, Spain) at 120 ° C., the dwell time in the damper being 9.5 minutes.
- the hot, moist cable was dried with hot air from 140 ° C.
- Example 2 The tear pull obtained was spun into a yarn of titer 250 dtex. The yarn shrinkage was 43.4%.
- the tensile test of the shrunk yarn measured 26.0% elongation and 8.4 cN / tex tensile strength.
- a dry-spun fiber cable made of an acrylonitrile copolymer having the composition 93.6% by weight of acrylonitrile, 5.7% by weight of methyl acrylate and 0.7% by weight of sodium methallysulfonate is washed in water at 70 ° C. and at the same temperature around Stretched 5 times the initial length. The speed after the stretching process is 72 m / min. After applying an antistatic, the product is dried at max. 140 ° C with air, the outlet speed from the dryer is 25% lower than the inlet speed. Before the tear processing at a heating plate temperature of 140 ° C and a cardiac output of 44%, the 6.84 km long cable stored in a perforated can is treated with saturated steam at 125 ° C in an autoclave.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Stringed Musical Instruments (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Reißzuges durch übliches Spinnen, Nachbehandeln und Reißen, dessen Einzelfasern einen Kochschrumpf von wenigstens 35 % aufweisen. Garne aus solchen Einzeifasern werden in zahlreichen Artikelgebieten, z. B. im Velour- oder Pelzimitationsbreich, eingesetzt. Die Garnherstellung erfolgt durch Verspinnen von Einzeifasern, die üblicherweise durch Schneiden von schrumpffähigen Fasersträngen erhalten werden. Ein solches Verfahren ist z. B. in der DE-OS 2 655 172 beschrieben. Hierbei muß zur Erhaltung der Schrumpffähigkeit eine schonende Trocknung bei Temperaturen unter 60 °C durchgeführt werden, was eine unerwünscht lange Zeit erfordert.The invention relates to a method for producing a tear pull by conventional spinning, post-treatment and tearing, the individual fibers of which have a cooking shrinkage of at least 35%. Yarns made from such single fibers are used in numerous article areas, e.g. B. in velor or fur imitation area used. The yarn is produced by spinning single fibers, which are usually obtained by cutting shrinkable fiber strands. Such a method is e.g. B. described in DE-OS 2 655 172. In order to maintain the shrinkability, gentle drying must be carried out at temperatures below 60 ° C., which requires an undesirably long time.
Es ist bekannt, daß der erzielbare Faserkochschrumpf vom effektiven Streckgrad abhängt, derart, daß mit höherem Streckgrad dieser Schrumpf im allgemeinen abnimmt. Daraus ergibt sich ein weiterer Nachteil für Hochschrumpffasern : die wegen des niedrigen Streckgrades geringe Festigkeit.It is known that the achievable fiber cooking shrinkage depends on the effective degree of stretching, such that this shrinkage generally decreases with a higher degree of stretching. This results in a further disadvantage for high shrink fibers: the low strength due to the low degree of stretch.
Für verschiedene Einsatzbereiche bei der Artikelherstellung ist es wünschenswert, farbige Garne einzusetzen. Eine Färbung der geschnittenen Einzelfasern oder der Garne kann nicht durchgeführt werden, weil dadurch der vorhandene Schrumpf bereits ausgelöst würde. Hochschrumpffasern müssen deshalb gefärbt werden, bevor sie ihren Schrumpfcharakter erhalten, also üblicherweise in der Spinnmasse. Aus wirtschaftlichen Gründen ist es dabei nicht möglich, bestimmte Partiegrößen mit einer Färbung zu unterschreiten.For different areas of application in the production of articles, it is desirable to use colored yarns. The cut individual fibers or the yarns cannot be dyed because this would already trigger the existing shrinkage. High-shrinkage fibers must therefore be dyed before they get their shrinking character, i.e. usually in the dope. For economic reasons, it is not possible to go below certain batch sizes with a coloring.
Aufgabe der vorliegenden Erfindung war deshalb die Herstellung von hochschrumpfenden Fasern nach einem wirtschaftlicheren Trocknungsprozess bei höheren Temperaturen, mit höherer Festigkeit im Schrumpfgarn und der Möglichkeit, kleinere Chargen zu färben. Es wurde nun überraschenderweise gefunden, daß man durch eine Sattdampffixierung nach der Verstreckung und vor dem Reißprozess ein Kabel erhält, das diese Forderungen erfüllt.The object of the present invention was therefore the production of high-shrinkage fibers after a more economical drying process at higher temperatures, with higher strength in the shrinking yarn and the possibility of dyeing smaller batches. It has now surprisingly been found that a saturated steam fixation after stretching and before the tearing process gives a cable which meets these requirements.
Gegenstand der Erfindung ist daher ein Verfahren zur Herstellung von hochschrumpfenden Reißzügen aus Acrylnitrilpolymerisaten nach üblichem Spinnen, Strecken und Reißen, dadurch gekennzeichnet, daß nach der Verstreckung und vor dem Reißen eine Sattdampffixierung zwischen 115 und 140 °C vorgenommen und das Reißen bei einem Heizzonenverzug (HZV) von mindestens 30 % durchgeführt wird. Die Dämpfdauer beträgt maximal 30 Minuten. Die Heizzone der Reißmaschine wird vorzugsweise auf 120 bis 160 °C erwärmt.The invention therefore relates to a process for the production of high-shrinkage tears made of acrylonitrile polymers after conventional spinning, stretching and tearing, characterized in that after stretching and before tearing, saturated steam fixation is carried out between 115 and 140 ° C and the tearing at a heating zone delay (HZV ) of at least 30%. The steaming time is a maximum of 30 minutes. The heating zone of the tearing machine is preferably heated to 120 to 160 ° C.
Üblicherweise wird beim Reißen ein HZV von 65% nicht überschritten. Vorteilhaft erfolgt die Relßverarbeitung bei einer Heizzonentemperatur von 120 bis 150 °C und einem HZV von 40 bis 60%.A cardiac output of 65% is usually not exceeded when tearing. Reless processing is advantageously carried out at a heating zone temperature of 120 to 150 ° C. and a cardiac output of 40 to 60%.
Völlig überraschend ist, daß die Trocknung solcher Kabel bei für Hochschrumpffasern außergewöhnlich hohen Temperaturen von 140 bis 150°C ausgeführt werden kann, ohne daß die Schrumpffähigkeit des Reißzugs beeinträchtigt wird. Durch den hohen Verzug bei der Reißverarbeitung erhalten die Einzelfasern und damit die Schrumpfgarne eine ausgezeichnete Festigkeit. Es ist nach dem erfindungsgemäßen Verfahren ohne weiteres möglich, beliebig kleine Chargen nach den bei der Kabelfärbung üblichen Methoden anzufärben, wobei es ohne Einfluß auf das Schrumpfverhalten ist, ob die Färbung vor oder nach dem Dämpfschritt erfolgt, was einen besonderen Vorteil des Verfahrens darstellt.It is completely surprising that the drying of such cables can be carried out at temperatures of 140 to 150 ° C., which are exceptionally high for high-shrink fibers, without the shrinkability of the pull pull being impaired. Due to the high warping during tear processing, the individual fibers and thus the shrink yarns are given excellent strength. According to the method according to the invention, it is readily possible to dye batches of any size using the methods customary in cable dyeing, it having no effect on the shrinkage behavior whether the dyeing takes place before or after the steaming step, which is a particular advantage of the method.
Acrylnitrilpolymerisate im Sinne des Verfahrens sind Polyacrylnitril oder vorzugsweise Acrylnitrilmischpolymerisate mit mindestens 50 Gew.-% an polymerisiertem Acrylnitril. Solche Mischpolymerisate enthalten ein oder mehrere mit Acrylnitril copolymerisierbare Monomere, wie Acrylsäureester, Vinylester oder Monomere mit farbstoffaffinen Gruppen. Vorzugsweise werden trockengesponnene Fadenbündel eingesetzt.Acrylonitrile polymers in the context of the process are polyacrylonitrile or preferably acrylonitrile copolymers with at least 50% by weight of polymerized acrylonitrile. Such copolymers contain one or more monomers copolymerizable with acrylonitrile, such as acrylic acid esters, vinyl esters or monomers with dye-affine groups. Dry-spun bundles of threads are preferably used.
Die nach Trockenspinnen erhaltenen Fäden werden zum Extrahieren des Restlösungsmittels durch wäßrige Bäder geführt, wobei sie auf das 2- bis 6-fache, vorzugsweise auf das 2- bis 3-fache verstreckt werden. Die Temperatur der wäßrigen Bäder beträgt maximal 100 °C, vorzugsweise 65 bis 75 °C.The threads obtained after dry spinning are passed through aqueous baths to extract the residual solvent, being drawn 2 to 6 times, preferably 2 to 3 times. The temperature of the aqueous baths is at most 100 ° C., preferably 65 to 75 ° C.
Die verstreckten Fäden werden wie bei Acrylkabeln üblich durch heiße Luft von 140 bis 150 °C getrocknet, nachdem sie mit einer für die Weiterverarbeitung notwendigen Präparation behandelt wurden. Um den Einzelfäden eine ausreichende Querhaftung zu verleihen, leitet man das Fadenbündel durch eine herkömmliche Stauchkammerkräusel.The stretched threads are dried, as is usual with acrylic cables, by hot air at 140 to 150 ° C after they have been treated with a preparation necessary for further processing. In order to give the individual threads sufficient lateral adhesion, the thread bundle is passed through a conventional stuffer box crimp.
Damit das Kabel nach der Reißverarbeitung, also der Reißzug, die gewünschte Schrumpfhöhe erhält, wird das Kabel mit Sattdampf unter Druck behandelt. Dabei wird eine Temperatur von 115 bis 140 °C eingehalten, da bei höheren Temperaturen eine Schädigung eintreten kann, die sich in einer Verschlechterung des Rohtons und bei einer Dämpfdauer, die größer als 30 Minuten ist, auch in einer Verminderung der feinheitsbezogenen Höchstzugkraft zeigt. Andererseits wird bei niedrigeren Temperaturen kein ausreichender Kochschrumpf im Reißzug mehr erzielt. Besonders vorteilhaft bei dem erfindungsgemäßen Verfahren ist die Austauschbarkeit der Reihenfolge der Verfahrensschritte Präparieren, Kräuseln, Dämpfen, Trocknen. Es ist dem Hersteller überlassen, die für ihn günstigste Kombination zu wählen. So kann bei Einsatz eines Großautoklaven eine ausreichende Menge an Kabel gesammelt werden, um einen wirtschaftlich optimalen Dämpfprozess so durchzuführen, daß das Kabel danach sofort der Reißmaschine vorgelegt werden kann. Ebenso kann eine kontinuierliche Dämpfung in geeigneten Apparaten direkt nach der Verstreckung erfolgen und Avivierung, Kräuselung, Trocknung in beliebiger Reihenfolge anschließend erfolgen.The cable is treated with saturated steam under pressure so that the cable is given the desired shrink height after the tear processing, i.e. the pull. A temperature of 115 to 140 ° C is maintained, since damage can occur at higher temperatures, which is reflected in a deterioration of the raw clay and a steaming time that is greater than 30 minutes, also in a reduction in the fineness-related maximum tensile force. On the other hand, sufficient shrinkage in the pull is no longer achieved at lower temperatures. The interchangeability of the sequence of the process steps preparation, crimping, steaming, drying is particularly advantageous in the method according to the invention. It is up to the manufacturer to choose the most favorable combination for him. When using a large autoclave, a sufficient amount of cable can be collected in order to carry out an economically optimal steaming process so that the cable can then be presented to the tearing machine immediately. Likewise, a continuous Damping is carried out in suitable equipment directly after stretching and finishing, crimping, drying in any order subsequently.
Zur Herstellung eines gefärbten Hochschrumpfreißzuges kann das Kabel nach einer der üblichen Methoden, wie Packfärbung oder Aufklotzen des Farbstoffs mit Hilfe eines Foulards gefärbt werden, wobei es ohne Einfluß auf das Schrumpfverhalten des Reißzugs ist, ob dabei eine Spinngutfärbung oder z. B. eine Färbung des Kabels im Ballen gewählt wird. Zweckmäßigerweise führt man die Färbung jedoch vor dem Dämpfschritt durch, weil bekanntermaßen durch einen Dämpfprozess der Farbstoff fixiert wird.To produce a colored high shrink zipper, the cable can be dyed using a foulard by one of the usual methods, such as pack dyeing or padding of the dye, it having no effect on the shrinkage behavior of the zipper, whether spinning or z. B. a coloring of the cable is selected in the bale. However, the dyeing is expediently carried out before the steaming step, because it is known that the dye is fixed by a steaming process.
Der im Reißzug erzielbare Kochschrumpf ist von verschiedenen Parametern abhängig. Es wurde gefunden, daß der Kochschrumpf umso höher ist, je höher der Comonomergehalt im Polymerisat ist, je niedriger das Streckverhältnis ist, wenn der Comonomergehalt unter 6 Gew.-% liegt, je höher die Fixiertemperatur (Sattdampf) ist und je höher die Temperatur und der HZV beim Reißprozess sind.The shrinkage that can be achieved in the pull depends on various parameters. It has been found that the higher the comonomer content in the polymer, the lower the stretch ratio when the comonomer content is below 6% by weight, the higher the fixing temperature (saturated steam) and the higher the temperature and the HZV during the tearing process.
Für bestimmte Artikelbereiche, z. B. bei Pelzimitationen ist neben der Schrumpfhöhe im Reißzug bzw. im Schrumpfgarn auch die Schrumpfkraft von Wichtigkeit, da der Schrumpf gegen den Widerstand der nicht oder nur geringer schrumpfenden Fasern ausgelöst werden muß. Es hat sich gezeigt, daß Copolymerisate mit einem Comonomergehalt zwischen 6 und 10 Gew.-% zu Reißzügen mit höherer Schrumpfkraft verarbeitet werden können, als solche mit einem Comonomergehalt zwischen 2 und 6 Gew.-%.For certain article areas, e.g. B. in imitation fur, in addition to the height of shrinkage in the pull or in the shrinking yarn, the shrinking force is also important, since the shrinkage must be triggered against the resistance of the non-shrinking or less shrinking fibers. It has been shown that copolymers with a comonomer content between 6 and 10% by weight can be processed into tears with a higher shrinking force than those with a comonomer content between 2 and 6% by weight.
Aufgrund der geschilderten Zusammenhänge zwischen Herstellungsparametern und Schrumpfeigenschaften ist es nach dem erfindungsgemäßen Verfahren möglich, Produkte mit gezielten Eingenschaften zu erzeugen.Due to the described relationships between manufacturing parameters and shrink properties, it is possible according to the method according to the invention to produce products with specific properties.
Ein Acrylnitrilcopolymerisat auf 90,48 Gew.-% Acrylnitril, 9,0 Gew.-% Acrylsäuremethylester und 0,52 Gew.-% Natriummethallylsulfonat wurde nach dem üblichen Trockenspinnverfahren gesponnen. Das Spinnkabel mit einer Gesamtstärke von ca. 230 g/m wurde in einer Wasch-Streck-Anlage bei 85 °C in Wasser gewaschen und in zwei Stufen bei einer Temperatur von 95 °C 1 : 6,0 verstreckt. Nach Aufbringen einer antistatischen Avivage ließ man das Kabel in einem mit Dampf von 102 °C beschickten Rohr um 29% schrumpfen und anschließend unter Spannung mit Luft von 135 °C auf eine Feuchte von 1,2 Gew.-% trocknen. Unter Zuführung von Sprühdampf unter 1 bar wurde das Kabel in einer Stauchkammer gekräuselt und in eine perforierte Kanne abgelegt. Nach einer Behandlung mit Sattdampf von 120 °C in einem Autoklaven wurde das Kabel auf einer Reißmaschine (Typ Seydel 671 S) bei 120 °C Heizplattentemperatur und einem HZV von 58 % gerissen. Bei der Prüfung der Einzelfasern des Reißkabels wurden folgende Werte gefunden :An acrylonitrile copolymer onto 90.48% by weight of acrylonitrile, 9.0% by weight of methyl acrylate and 0.52% by weight of sodium methallylsulfonate was spun by the usual dry spinning process. The spinning tow with a total thickness of approx. 230 g / m was washed in water in a washing-stretching system at 85 ° C. and stretched in two stages at a temperature of 95 ° C. 1: 6.0. After applying an antistatic finish, the cable was allowed to shrink by 29% in a tube charged with steam at 102 ° C. and then dried under tension with air at 135 ° C. to a moisture content of 1.2% by weight. While supplying spray steam below 1 bar, the cable was crimped in a stuffer box and placed in a perforated can. After treatment with saturated steam at 120 ° C. in an autoclave, the cable was torn on a tearing machine (type Seydel 671 S) at a heating plate temperature of 120 ° C. and a cardiac output of 58%. The following values were found when testing the individual fibers of the tear cable:
Die Fasern des Reißzuges zeigten einen mittleren Kochschrumpf von 30 %, einen maximalen Kochschrumpf von -36%, das aus diesen ersponnene Garn einen Kochschrumpf von 38,7 % bei einer Schrumpfkraft (180°C Heißluft) von 5,9 mN/tex.The fibers of the tear pull showed an average cooking shrinkage of 30%, a maximum cooking shrinkage of -36%, and the yarn spun from this yarn showed a cooking shrinkage of 38.7% with a shrinking force (180 ° C. hot air) of 5.9 mN / tex.
Ein Acrylnitrilpolymerisat gleicher Zusammensetzung wie in Beispiel 1 wurde nach üblichem Trockenspinnverfahren versponnen. Das Faserbündel enthielt noch 16,4 Gew.-% des Lösungsmittels, welches in einem Wasch-StreckVerfahren mit Hilfe von Wasser bei erhöhter Temperatur ausgewaschen wurde. Die Temperatur in den Waschwannen betrug 85 °C, die in den Streckwannen 95 °C. Der Geschwindigkeitsquotient von Ein- und Auslauf in der Wasch-Streck-Anlage betrug 1 : 5,0. Danach erhielt das gestreckte und gewaschene Kabel eine antistatische Avivage und wurde anschließend in einem kontinuierlichen Druckdämpfer (System Tunnel, Fa. Serracant, Spanien) bei 120 °C gedämpft, wobei die Verwielzeit im Dämpfer 9,5 Minuten betrug. Das heiße, feuchte Kabel wurde mit Heißluft von 140 °C bis auf eine Restfeuchte von 0,9 Gew.-% getrocknet, gekräuselt und auf der in Beispiel 1 genannten Reißmaschine bei 160 °C 50 % zwischen den Heizplatten gedehnt. Der erhaltene Reißzug wurde zu einem Garn vom Titer 250 dtex versponnen. Der Kochschrumpf des Garns lag bei 43,4%. Bei der Reißprüfung des ausgeschrumpften Garns wurden 26,0% Dehnung und 8,4 cN/tex Reißkraft gemessen.An acrylonitrile polymer of the same composition as in Example 1 was spun by a conventional dry spinning process. The fiber bundle still contained 16.4% by weight of the solvent, which was washed out in a washing-stretching process using water at elevated temperature. The temperature in the washing tubs was 85 ° C, that in the stretching tubs 95 ° C. The speed quotient of the inlet and outlet in the washing-stretching system was 1: 5.0. The stretched and washed cable was then given an antistatic finish and was then steamed in a continuous pressure damper (System Tunnel, Serracant, Spain) at 120 ° C., the dwell time in the damper being 9.5 minutes. The hot, moist cable was dried with hot air from 140 ° C. to a residual moisture content of 0.9% by weight, crimped and stretched 50% between the heating plates at 160 ° C. on the tearing machine mentioned in Example 1. The tear pull obtained was spun into a yarn of titer 250 dtex. The yarn shrinkage was 43.4%. The tensile test of the shrunk yarn measured 26.0% elongation and 8.4 cN / tex tensile strength.
Ein Acrylnitrilcopolymerisat mit einer wie in den Beispielen 1 und 2 beschriebenen Zusammensetzung wurde trocken versponnen, in hei-βem Wasser von 85 °C-95 °C gewaschen und dabei auf das 6-fache seiner ursprünglichen Länge verstreckt. Das nasse, mit einem Antistatikum versehene Kabel wurde in einer üblichen Stauchkammer gekräuselt und dabei bis auf eine Restfeuchte von ca. 20 Gew.-% mechanisch entwässert. Anschließend erfolgte eine Färbung in wäßriger Flotte unter erhöhtem Druck von 2,1 bar nach dem bekannten « Kabelpack »-Verfahren. Nach einer spannungslosen Trocknung bei einer Lufttemperatur von 140 °G wurde das Kabel zu Reißzug verarbeitet. Die Heizplatten waren auf 120°C erwärmt, der HZV betrug 58 %. Der Reißzug schrumpfte um 41 %, das daraus hergestellte Garn um 43,4 %.An acrylonitrile copolymer with a composition as described in Examples 1 and 2 was spun dry, washed in hot water at 85 ° C.-95 ° C. and stretched to 6 times its original length. The wet, antistatic cable was crimped in a conventional stuffer box and mechanically dewatered to a residual moisture of about 20% by weight. This was followed by dyeing in an aqueous liquor under elevated pressure of 2.1 bar using the known “cable pack” method. After tension-free drying at an air temperature of 140 ° G, the cable was processed into a pull. The heating plates were heated to 120 ° C, the HZV was 58%. The pull shrank by 41%, the yarn made from it by 43.4%.
Ein trockengesponnenes Faserkabel aus einem Acrylnitrilcopolymerisat der Zusammensetzung 93,6 Gew.-% Acrylnitril, 5,7 Gew.-% Acrylsäuremethylester und 0,7 Gew.-% Natriummethallysulfonat wird in Wasser bei 70 °C gewaschen und bei gleicher Temperatur um das 2,5-fache der Ausgangslänge verstreckt. Die Geschwindigkeit nach dem Streckprozess beträgt 72 m/min. Nach Auftragen eines Antistatikums trocknet man das Produkt bei max. 140 °C mit Luft, wobei die Auslaufgeschwindigkeit aus dem Trockner um 25 % geringer ist als die Einlaufgeschwindigkeit. Vor der Reißverarbeitung bei 140 °C Heizplattentemperatur und einem HZV von 44 % wird das in einer perforierten Kanne abgelegte Kabel von 6,84 km Länge in einem Autoklaven mit Sattdampf von 125 °C behandelt. Dabei werden 5 Dampfstöße von je 2 min Dauer und 7 Evakuierphasen von je 2 min Dauer durchgeführt, um eine gleichmäßige Erwärmung der Einzelfasern zu gewährleisten. Die Einzelfasern des Reißzuges haben einen Kochschrumpf zwischen 32 und 38 %, wobei das Maximum der Verteilungskurve bei 36 % liegt. Nach der Ausspinnung eines Garns (250 dtex) aus diesem Reißzug wird ein Garnkochschrumpf von 43 % gemessen.A dry-spun fiber cable made of an acrylonitrile copolymer having the composition 93.6% by weight of acrylonitrile, 5.7% by weight of methyl acrylate and 0.7% by weight of sodium methallysulfonate is washed in water at 70 ° C. and at the same temperature around Stretched 5 times the initial length. The speed after the stretching process is 72 m / min. After applying an antistatic, the product is dried at max. 140 ° C with air, the outlet speed from the dryer is 25% lower than the inlet speed. Before the tear processing at a heating plate temperature of 140 ° C and a cardiac output of 44%, the 6.84 km long cable stored in a perforated can is treated with saturated steam at 125 ° C in an autoclave. 5 bursts of steam, each lasting 2 minutes, and 7 evacuation phases, each lasting 2 minutes, are carried out in order to ensure uniform heating of the individual fibers. The individual fibers of the pull have a shrinkage between 32 and 38%, the maximum of the distribution curve being 36%. After spinning a yarn (250 dtex) from this pull, a yarn boil shrinkage of 43% is measured.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT81101530T ATE5334T1 (en) | 1980-03-15 | 1981-03-04 | PROCESS FOR THE MANUFACTURE OF HIGH SHRINKABLE TEARS FROM ACRYLIC NITRILE POLYMERS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803010045 DE3010045A1 (en) | 1980-03-15 | 1980-03-15 | METHOD FOR THE PRODUCTION OF HIGH-SHRINKABLE ZIPPERS FROM ACRYLNITRILE POLYMERISATION |
| DE3010045 | 1980-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0036517A1 EP0036517A1 (en) | 1981-09-30 |
| EP0036517B1 true EP0036517B1 (en) | 1983-11-16 |
Family
ID=6097341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81101530A Expired EP0036517B1 (en) | 1980-03-15 | 1981-03-04 | Method of producing highly-shrinkable tows of acrylonitrile polymerisates |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4434530A (en) |
| EP (1) | EP0036517B1 (en) |
| JP (1) | JPS56144215A (en) |
| AT (1) | ATE5334T1 (en) |
| CA (1) | CA1156413A (en) |
| DE (2) | DE3010045A1 (en) |
| ES (1) | ES500335A0 (en) |
| IE (1) | IE50868B1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3225268A1 (en) * | 1982-07-06 | 1984-01-12 | Bayer Ag, 5090 Leverkusen | CONTINUOUS DRY SPINNING PROCESS FOR HIGH-SHRINKABLE ACRYLNITRILE THREADS AND FIBERS |
| GB2187481B (en) * | 1986-03-24 | 1989-12-06 | Sipa Societa Italiana Prodotti | Process for shrinking thermically shrinkable fibres |
| JP2552455Y2 (en) * | 1991-06-18 | 1997-10-29 | 旭化成工業株式会社 | towel |
| US6352948B1 (en) | 1995-06-07 | 2002-03-05 | Kimberly-Clark Worldwide, Inc. | Fine fiber composite web laminates |
| US5972499A (en) * | 1997-06-04 | 1999-10-26 | Sterling Chemicals International, Inc. | Antistatic fibers and methods for making the same |
| US7100246B1 (en) * | 1999-06-14 | 2006-09-05 | E. I. Du Pont De Nemours And Company | Stretch break method and product |
| US20060204753A1 (en) * | 2001-11-21 | 2006-09-14 | Glen Simmonds | Stretch Break Method and Product |
| KR20060124726A (en) * | 2004-02-27 | 2006-12-05 | 이 아이 듀폰 디 네모아 앤드 캄파니 | Spun yarn, and method and apparatus for the manufacture thereof |
| US20060165982A1 (en) * | 2005-01-21 | 2006-07-27 | Simmonds Glen E | Staple yarn manufacturing process |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3052512A (en) | 1960-06-14 | 1962-09-04 | American Cyanamid Co | Art of producing polyacrylonitrile filamentary materials |
| US3177555A (en) | 1960-08-09 | 1965-04-13 | Eastman Kodak Co | Process for treating textile filaments |
| US3302385A (en) * | 1961-08-26 | 1967-02-07 | Ruddell James Nelson | Modification of filaments |
| US3384694A (en) * | 1963-11-21 | 1968-05-21 | Asahi Chemical Ind | Method of producing aligned acrylonitrile polymer filament yarns |
| US3503100A (en) | 1966-09-08 | 1970-03-31 | Eastman Kodak Co | Method of processing large denier tow |
| JPS5037298B1 (en) * | 1970-05-09 | 1975-12-01 | ||
| UST884016I4 (en) * | 1970-06-29 | 1971-03-16 | Defensive publication | |
| DE2420472A1 (en) | 1974-04-27 | 1975-11-13 | Bayer Ag | METHOD OF MANUFACTURING LUXURY YARN |
| US4011294A (en) | 1974-06-18 | 1977-03-08 | E. I. Du Pont De Nemours And Company | Process for making high shrinkage acrylic fibers |
| DE2454322A1 (en) | 1974-11-15 | 1976-05-20 | Bayer Ag | Dry-spun nodacrylic fibres - from acrylonitrile vinyl chloride and chlorine and sulphur contg copolymers |
| DE2502195C2 (en) | 1975-01-21 | 1983-12-29 | Bayer Ag, 5090 Leverkusen | Process for the production of acrylic fibers or threads |
| US4071596A (en) | 1975-06-20 | 1978-01-31 | E. I. Du Pont De Nemours And Company | Process for making high shrinkage acrylic fibers |
| DE2622920A1 (en) | 1976-05-21 | 1977-12-01 | Bayer Ag | CROSS-LINKED ACRYLONITRILE COPOLYMERISATES |
| DE2655172A1 (en) | 1976-12-06 | 1978-06-08 | Du Pont | High-shrinkage acrylic fibre prodn. - by wash drawing at critical bath temp. cooling and drying under specified conditions |
| DE2658916A1 (en) | 1976-12-24 | 1978-07-06 | Bayer Ag | POLYACRYLNITRILE FILAMENT YARN |
-
1980
- 1980-03-15 DE DE19803010045 patent/DE3010045A1/en not_active Ceased
-
1981
- 1981-03-04 EP EP81101530A patent/EP0036517B1/en not_active Expired
- 1981-03-04 AT AT81101530T patent/ATE5334T1/en not_active IP Right Cessation
- 1981-03-04 DE DE8181101530T patent/DE3161396D1/en not_active Expired
- 1981-03-05 US US06/241,199 patent/US4434530A/en not_active Expired - Fee Related
- 1981-03-13 IE IE555/81A patent/IE50868B1/en unknown
- 1981-03-13 JP JP3547581A patent/JPS56144215A/en active Pending
- 1981-03-13 ES ES500335A patent/ES500335A0/en active Granted
- 1981-03-13 CA CA000373000A patent/CA1156413A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1156413A (en) | 1983-11-08 |
| EP0036517A1 (en) | 1981-09-30 |
| ES8201650A1 (en) | 1981-12-16 |
| JPS56144215A (en) | 1981-11-10 |
| DE3161396D1 (en) | 1983-12-22 |
| ATE5334T1 (en) | 1983-12-15 |
| IE810555L (en) | 1981-09-15 |
| ES500335A0 (en) | 1981-12-16 |
| US4434530A (en) | 1984-03-06 |
| DE3010045A1 (en) | 1981-09-24 |
| IE50868B1 (en) | 1986-08-06 |
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