Bayer Faser Gmbh

Bayer Aktiengesellschaft

Other

Wolfgang Anderheggen

Ulrich Reinehr

Toni Herbertz

Tilo Sehm

Gunter Turck

Gino Antolini

Wolfram Wagner

Roland Vogelsgesang

Michael Kraemer

Wolfgang Olges

G&uuml;nter Spilgies

Thomas Dragovic

Helmut Judat

Winand Hahn

Described are a process for producing elastane yarn having a linear density of at least 2500 dtex by the wet spinning process and the thereby producible coarse linear density elastane yarn having a wide cross section and a low residual solvent content. The process comprises the steps of spinning an up to 35% strength by weight stable-viscosity elastane solution into a coagulation bath, washing and optionally drawing, drying by contact heating, setting, spin finishing and winding the yarn, the filaments leaving the coagulation bath passing around a diverting roller disposed just above the coagulation bath liquid, the as-spun filament linear density amounting to not more than 1% of the value of the final linear density, the jet stretch ratio being within the range from 0.5 to 50, the contact heating temperature being at least 220&#xb0; C. and the contact time of the elastane yarn being at least 2 seconds.

Elastane yarn having a linear density of at least 2500 dtex and a cross-sectional width to height ratio of at least 4:1

Method and device for producing elastane threads from spinning solutions using recycled elastane material.

Method and device for producing elastane threads from recycling material

An elastance spool is described which comprises a winding of elastane threads having a titre of greater than 160 dtex, particularly from 160 dtex to 1400 dtex, and a bobbin weight of elastane threads of at least 1.5 kg, in which the elastane threads have a ribbon-shaped fiber cross-section, wherein the ratio of the width of the elastane threads to the thickness of the elastane threads in cross-section is at least three to one. The elastane spool is used for the production of textile sheet products and for the production of disposable articles of hygiene.

Elastane package

Described is wet-spun plural-end elastane yarn having a yarn linear density of up to 2500 dtex, high surface luster and a ribbony cross section and formed from bonded-together individual filaments having an oval to circularly round cross section, the width of the elastane yarn in cross section being at least four times the thickness of the elastane yarn.

Method of producing elastane fiber by wet spinning

There is described a method for the storing of elastan filaments with a titre of at least 2,500 dtex in drums with a filament line length of at least 10 km with the use of a displacing device, in which the filaments are stored meandering in layers, and in which the filaments are inlaid into the drum at a speed of at least eight per cent above the production speed of the filaments.

Method for the storing of elastan filaments with coarse tires

Described are a process for producing elastane yarn having a linear density of at least 2500 dtex by the wet spinning process and the thereby producible coarse linear density elastane yarn having a wide cross section and a low residual solvent content. The process comprises the steps of spinning an up to 35% strength by weight stable-viscosity elastane solution into a coagulation bath, washing and optionally drawing, drying by contact heating, setting, spin finishing and winding the yarn, the filaments leaving the coagulation bath passing around a diverting roller disposed just above the coagulation bath liquid, the as-spun filament linear density amounting to not more than 1% of the value of the final linear density, the jet stretch ratio being within the range from 0.5 to 50, the contact heating temperature being at least 220&deg; C. and the contact time of the elastane yarn being at least 2 seconds.

Process of making elastane yarn

Elastane fiber

A spinning noxxle apparatus for the production of elastane filaments from spinning solutions by the wet spinning method comprising a feed line (7) for the spinning solution, a filter unit (1) having a mixer element (2) and a filter element element (3), a spinning nozzle (5) for immersion in a precipation bath (11), and a connection piece (8) for the direct connection of the filter unit (1) and spinning nozzle (5), wherein the spinning nozzle (5) is joined to the connection piece (8) by a quick-release coupling connection (4), particularly a bayonet coupling (4).

Apparatus and a process for the production of elastane filaments

This invention relates to a new washing apparatus for the continuous production of elastane filaments which are produced by a wet-spinning process, which essentially consists of a stripping unit (10) and a washing unit (11) which are disposed in steps above the precipitation bath (1) of a wet-spinning device.

Apparatus and a process for washing continuously wet-spun elastane

The invention relates to a process for preparing multifilament, wet-spun elastane threads with increased spinning output, which is achieved by largely removing entrained water from the filaments after leaving the spinning bath and then fixing the threads on at least two rollers at a temperature of at least 200.degree. C. for at least 3 seconds.

Process for preparing multifilament, wet-spun elastane threads

The invention relates to a process for adjusting the viscosity of highly concentrated elastane solutions by reaction of the solution with secondary aromatic amines in order to produce spinning solutions for the dry or wet spinning of elastane fibres.

Process for adjusting the viscosity of highly concentrated elastane

Process for preparing multifilament wet-spun elastane threads

The invention relates to a process for adjusting the viscosity of highly concentrated elastane solutions by reaction of the solution with secondary aromatic amines in order to produce spinning solutions for the dry or wet spinning of elastane fibers.

This invention relates to processes for the production of mono- and multifilaments and also staple fibers of multifilaments based on polyarylene sulfides, preferably substantially linear polyarylene sulfides and, more preferably, substantially linear poly-p-phenylene sulfide by melt spinning, multistage stretching and optionally crimping and setting. As a result of the treatment by blowing of air onto the stabilized spun filaments in the first stretching stages at temperatures .ltoreq.100.degree. C. (preferably in stretching baths, more particularly in boiling water), the chain molecules are oriented; the orientation and crystallinity required for high strengths is achieved by afterstretching (in hot air) at elevated temperature. The residence times in the first stage required for effective stretching in accordance with the invention can only be varied within relatively narrow limits in order subsequently to achieve the calculated orientations and effects, particularly high strengths, crystallinities and densities. Overly long residence times at temperatures above 100.degree. C. result in elongation of the material with no additional orientation and hence with an inadequate increase in strength. To increase crystallinity and strength in the production of mono- and multifilaments, multistage stretching may be followed by a thermal aftertreatment; in the staple fiber process, the material is additionally crimped, set (in the absence of tension) and cut. Where an aerodynamic crimping nozzle is used, as is preferably the case, stretching has to be carried out in accordance with the invention in such a way that the fibers are left with sufficiently high shrinkage which is important for crimping and subsequent processing. Crimping is improved by setting in the absence of tension. Relatively high-tensile fibers with sufficiently high residual crimping for subsequent processing are obtained. Textile-denier fibers (up to about 20 dtex) having hitherto unknown strengths of &gt;6 cN/dtex, preferably &gt;6.2 cN/dtex and, more preferably, &gt;6.4 cN/dtex are claimed.

Processes for the production of mono- and multifilaments and staple

Processes for the production of mono- and multifilaments and also staple fibers of multifilaments based on polyarylene sulfides by melt spinning, multistage stretching and setting. As a result of the treatment by blowing of air onto the stabilized spun filaments in the first stretching stages at temperatures .ltoreq.100.degree. C., the chain molecules are oriented; the orientation and crystallinity required for high strengths is achieved by afterstretching at elevated temperature. The residence times in the first stage required for effective stretching can only be varied within relatively narrow limits in order subsequently to achieve the calculated orientations and effects. Overly long residence times at temperatures above 100.degree. C. result in elongation of the material with no additional orientation and hence with an inadequate increase in strength.

Growing community of inventors

Dormagen, Germany

Wolfgang Anderheggen