EP1200333B1 - Elastane fiber spools provided with a variable application of a preparation - Google Patents

Abstract

The invention relates to elastane fiber spools which are placed on cylindrical tubes and which are provided with a varying content of preparation oil over the length of the thread, and to a method for the production thereof. According to the invention, the preparation oil is unevenly applied along the thread but noticeably increases on the outermost portion of the fiber wound on the tubes, said portion amounting to, in particular, at least 3 %, such that the application of oil in this area is at least 1.2 times greater than that in the remaining area of the spool. This results in the formation of a gradient of the application of the preparation on the spool that extends from the outside (high) to the inside (low).

Description

The invention relates to elastane spools on cylindrical sleeves with an over the thread length different content of preparation oil are provided, as well as a Process for their production. This preparation oil is not evenly along of the thread, but on the outermost, in particular at least 3% amount of the thread wound on the tubes significantly increased so that the oil application in this area is at least 1.2 times higher than in the rest Area of the coil. This creates a gradient of the preparation job the coil from the outside (high) to the inside (low).

Elastane threads or elastanes are understood to mean fibers or threads which are at least 85% by weight of segmented polyurethanes or polyurethane ureas consist. The elastic and mechanical properties of such fibers are achieved in that, for example, polyurea-polyurethanes are used to produce the elastane threads from aromatic diisocyanates can be used. such Elastanes are usually made by spinning solutions using the wet spinning process or preferably produced by the dew-spin process. As Solvents are suitable in both processes, polar solvents, e.g. B. dimethyl sulfoxide, N-methylpyrrolidone, dimethylformamide or preferably dimethylacetamide.

Commercial yarns made from such fibers have been around for many years known. The most important areas of application for these fibers are the elasticizing function for laundry, corsetry and bathing fabrics as well as for use in garters, Sock edges or elastic bands.

To be able to produce these goods in high quality, they have to be there used elastane spools meet important minimum requirements:

Because dry-spun elastane fibers have a very sticky surface have, it must be ensured that the thread wound on sleeves easily detaches from the spool and smoothly deflects all processing machines passes. To do this, the spinning material has to be spun already (see US-A-4,296,174) an anti-adhesive mostly in the form of alkaline earth metal soaps, be added. In addition, the thread, usually during winding, with lubricants such as B. provided silicone oils. The simultaneous application of lubricants and non-stick agents (see US-A-3 039 895) on the elastane thread has also been described.

The introduction of non-stick agents or the application of lubricants Silicone oil on the elastane thread must be done with high uniformity to ensure that the thread is equally sticky at every point on its bobbin travel (Liability) both towards the thread layers on the bobbin, of which it is must replace, as well as against the thread guide elements of the processing machines has. Maruyama et al in JP 63-66073 go on the uniformity of the oil application even so far, the different stretching of the elastane thread inside the Take the coil into account when applying the oil.

Which polysiloxanes are particularly suitable as lubricants for elastane threads describes e.g. B. the document US-A-3 296 063. The amount of oil application is of the order of magnitude between 2% and 10% of the total weight of the elastane thread.

In the usual dry spinning process, mostly made according to the elastane the oil is carried directly below the spinning shaft either by dipping, Spray or by touching a thread guide or a roller.

The patent describes an improvement of this standard method US-A-55 60 558.

In order to increase the processing reliability of elastane spools, it is proposed there the last 100 - 500 m of wound elastane thread on each spool only to be provided with a significantly reduced oil application, so that in the outer location of the Bobbin creates a stronger adhesion of the thread to its base and thereby a falling of the top layers over the coil school is avoided.

Surprisingly, it has now been found that it is important in elastane processing There are areas of application that have an opposite type of coil to that in US-A-55 60 558 described require.

One of the most important areas of application for elastane fibers is the use in Pantyhose bands. Thread thicknesses are usually in the range between 133 dtex and 270 dtex used.

To meet the high demands in the hosiery industry regarding the To be able to guarantee drainage properties are in this industry biconical coils with precision winding. Such special coils are usually not produced directly after the elastane dry spinning process; at this point, a sufficient for most processing forms, stable and inexpensive to produce coil with wild winding. For the Hosiery industry then has to be expensive in a second, however. production stage the thread from the bobbin with wild winding to one with precision winding be rewound.

One way to avoid this second complex production step is Use of the Digicone process (Melliand Textilberichte 6, 1985, p. 408), the is integrated into a winder, which is directly under an elastane dry spinning shaft is attached.

If you use this method, you apply an oil like in the elastane industry usual and sets the biconical precision coils thus produced for the production of pantyhose bands, however, it is found that only unsatisfactory Results will be obtained. The pantyhose fringes that come from the outside Location of such a coil are made much narrower than that come from material inside the coil. These differences in the Waist sizes (commonly referred to as "table size" in the hosiery industry) so large (> 0.5 cm) that the tights can be further processed under the same Conditions is no longer possible. It is particularly annoying that this disadvantageous Effect significantly increased if the bobbins are used for a long time before processing are stored, which is usually on the way from the elastane manufacturer to Processor is the case. After a storage period that is longer than approx. 2-3 weeks, then table dimension differences between the inner and outer position can occur up to 2 cm.

Surprisingly, it has now been found that this disruptive effect can be avoided that in the outer layer of an elastane coil, especially one Biconical elastane precision coil manufactured according to the Digicone process, on the outermost part of the thread length equal to at least 3% of the thread length of the thread wound on the tubes significantly increases the preparation order, that the oil application in this area is at least 1.2 times higher than in the interior Area of the coil.

The invention relates to elastane spools on cylindrical sleeves, made of elastane threads provided with a preparation oil by external application, characterized, that on the outermost at least 3%, preferably at least 5%, especially preferably at least 10% of the part wound on the sleeves Elastane thread the preparation oil content is increased so that the content on preparation oil applied to the fiber surface in this area at least that 1.2 times, preferably 1.5 times the content of the on the surface of the threads in inner area, in particular in the area of the at least 20% portion of the preparation oil applied to the innermost threads of the bobbin.

The elastane coil is preferably one produced by the Digicone process biconical elastane precision coil.

The content of the preparation oil on the outermost part of the coil is preferred Shape compared to the at least 30% of the innermost threads the coil increases.

The spandex threads of the bobbin in particular have a total titer of 100 to 350 dtex, preferably from 130 to 270 dtex.

Elastane coils in which the content of is on the surface are very particularly preferred of the applied preparation oil in the outermost amount of at least 3% Part of the thread length over a period of at least 25 days, in particular of at least 55 days after manufacture of the coils compared to the inner, in particular at least 20% portion of the thread length increased remains.

The following are preferably used as preparation oils:

Polysiloxanes, polyalkylsiloxanes and / or alkoxylated polysiloxanes, in particular polydimethylsiloxane and / or ethoxylated polydimethylsiloxane with a viscosity of 2 to 100 mPa.s (at 25 ° C), in particular from 2.5 to 50 mPa.s (at 25 ° C), particularly preferably from 2.5 to 30 mPa.s (at 25 ° C.),
or mineral oil with a viscosity of 2 to 2500 mPa.s (at 25 ° C), in particular from 2.5 to 2000 mPa.s (at 25 ° C), particularly preferably from 3 to 1 500 mPa.s (at 25 ° C),
or any mixture of the mineral oils and poly (alkyl) siloxanes mentioned.

The preparation oils described above can be further additives known in principle such as metal soaps effective as non-stick agents e.g. of higher fatty acids like Mg stearate, antistatic agents and / or dispersing agents are added.

Another object of the invention is a method for producing the invention Elastane spools by spray navigation, disposable preparation or application of Preparation oil by means of preparation rollers, characterized in that the Applying the preparation oil to the spandex thread to be wound on a bobbin, the outer 3%, preferably 5%, provided for the outer layer of the coil, in particular 10% of the thread by increasing the supply of the preparation oil to the Thread with at least 1.2 times the content of preparation oil provides in the ratio to the innermost part of the coil in particular to the at least 20% of the Bobbin part of the thread.

A preferred method is characterized in that the preparation oil is direct after spinning the elastane threads, especially in the lower area or on Output of the spinning shaft is applied.

The invention also relates to the use of the elastane spools according to the invention for the production of laundry, corsetry and bathing fabrics as well as for the production of garters, sock edges or elastic bands.

The method of applying the oil to the last at least 3% of the sleeve Increasing wound spandex depends on the technique used Oil application from. E.g. uses a spray method to spray the oil, So you open a valve that regulates the oil supply to the spraying device in question Area of thread a little wider.

The procedure is similar when you have a role, including a preparation godet or roller called, used for oil application. The bottom of the roll dips into one Tub that is always filled with preparation liquid, e.g. through continuous Delivery of the oil to the tub. By rotating the roller, it is wetted with oil; the faster the roller turns, the more oil it absorbs. The Elastane thread itself is usually made with constant speed and tension directly below the spinning shaft exit or even after the first deflection guided past the preparation roll by a godet and takes more or less high oil quantities depending on the speed of rotation of the roller on. To e.g. to achieve the oil application by a factor of 1.5 in the To increase the outer position of the coil, the speed of the preparation godet must be reduced this method by at least a factor of 2 compared to the speed of the Role in the preparation of the inner layers can be increased. A detailed description the preferred procedure can be found in the examples.

Preparation rolls for the roll application can be smooth or grooved according to the Principle known arrangements.

Another method of applying preparation oil is disposable preparation.

The thread is passed over a pen or shoe, one or more Contains holes for the supply of preparation oil. Through contact with the The oil is applied to the thread on the pen / shoe.

The preparation methods are basically known per se and for example presented in B.v. Falkai, "Synthesefaser", p. 111 ff., Verlag Chemie, Weinheim 1,981th

The determination of whether the desired oil application according to the invention has been achieved takes place, for example, according to the following method:

The preparation of the fiber samples is carried out using a Pulse NMR device QP 20+ from Oxford Instruments. Here, the resonance signal Protons in the liquid phase of a solid / liquid mixture for quantitative Determination of the liquid phase used.

When using this method, the device must first be calibrated become. For this, preparation-free spun elastane threads with different Amounts of preparation oil well wetted and the amount applied in each case determined by weighing and then carried out the NMR measurement. Within of the expected measuring range, this is done 10 to 12 times and thus one Preserved calibration curve.

For each preparation oil used and for each type of elastane used (e.g. Polyester or polyether elastane) must each have their own calibration curve become.

For the measurement itself, approx. Remove 0.8 to 2.0 g of thread material from the bobbin, into a glass tube from Diameter 16 mm spent and without further pretreatment using the Measure the Hahn echo pulse method. For a preparation determination, 20 FID's added up.

It is important to take these measurements within the first four days of making them Perform spinning bobbins, as diffusion effects within the bobbin Shift the oil content between the inner and outer layer over time.

As a result of the invention, modified compared to the prior art The Digicone process can be used as a substitute for the usual preparation job Process: Production of the primary coil with wild winding and subsequent Use rewinding to the biconical precision spool without using a processing Garter manufacturers have a disadvantage due to strongly fluctuating tights (Table dimensions) occurs.

The invention is explained in more detail below using the figures described.

Fig. 1

Ein Diagramm des Gehalts an Präparationsöl in Abhängigkeit von der Fadenlänge bei vier verschieden lang gelagerten, konventionellen Spulen (Titer 195 dtex)

Fig. 2

Ein Diagramm wie in Fig. 1, jedoch ermittelt mit vier erfindungsgemäßen Spulen (Titer 195 dtex)

Fig. 3

Ein Diagramm wie in Fig. 2, mit vier erfindungsgemäßen Spulen (Titer 195 dtex)

Fig. 4

Ein Diagramm wie in Fig. 2 mit vier erfindungsgemäßen Spulen (Titer: 195 dtex)

Fig. 5

Ein Diagramm wie in Fig. 1, erstellt auf Basis von vier nicht erfindungsgemäßen Spulen (Titer: 195 dtex)

Show it:

Fig. 1

A diagram of the content of preparation oil as a function of the thread length for four conventional bobbins with different lengths (titer 195 dtex)

Fig. 2

A diagram as in FIG. 1, but determined with four coils according to the invention (titer 195 dtex)

Fig. 3

A diagram as in FIG. 2, with four coils according to the invention (titer 195 dtex)

Fig. 4

A diagram as in FIG. 2 with four coils according to the invention (titer: 195 dtex)

Fig. 5

A diagram as in FIG. 1, created on the basis of four coils not according to the invention (titer: 195 dtex)

Examples:

The following examples describe the preparation of the invention Elastane spools, they prove the beneficial effect of further processing Pantyhose bands.

Production of the fiber raw material:

In all examples, the coils were made from an elastane polymer that from a poly (tetramethylene ether) glycol of molecular weight 2000, capped with Methylene bis (-4-phenyldiisocyant) ("MDI") and chain extended with one Mixture of ethylenediamine (EDA) and diethylamine (DEA) was synthesized. The Synthesis procedure was the same for all examples:

There are 44.9 parts by weight of polyether diol of molecular weight 2000 with 8.9 Parts by weight of MDI and 31 parts by weight of dimethylacetamide mixed, at 50-55 ° warmed and 95 min. kept at this temperature to be an isocyanate capped To obtain polymer with an NCO content of 2.10%.

To prepare the polyurethane urea, a solution of 171.4 parts of DMAC, 0.97 parts of EDA and 1.385 parts of a 10% solution of DEA in dimethylacetamide and 0.00042 parts of the dye Makrolexviolett B (Bayer AG) is prepared at 25 ° cooled and presented. To slow the reaction rate, 1.1 parts of dry ice in pellet form can be added to this mixture. The previously prepared, already cooled prepolymer is then added to this mixture with vigorous stirring, so that a solution of the polyurethane Hamsioff in DMAC with a solids content of 22% is formed. By adding hexamethylene diisocyanate (HDI), the molecular weight of the polymer is adjusted so that the solution finally has a viscosity of 70 Pa.s / 25 ° and an inherent viscosity of η _mh = 1.21 dl / g.

After the preparation of the polymer described in the previous section this is mixed with a master batch of additives consisting of 0.52 parts of cyanox 1790 (1.3.5-tris (4-t-butyl-3-hydroxy-2,6-dimethylbenzyl) -1.3.5-triazine-2,4.6- (1H, 3H, 5H) trione, a stabilizer from Cytec Industries) and 4.7 parts of DMAC consists. A further additive is 0.5 parts of a 40% solution of a reaction product of 4-methyl-4-aza-heptanediol-2,6 with Desmodur W in dimethylacetamide added.

A second stock batch consisting of 22.75 parts is mixed into this spinning solution a 42% suspension of titanium dioxide type RKB 2 (Bayer AG) and 7.75 Share 30% spinning solution in such a way that the finished thread has a titanium dioxide content of 0.1% by weight, based on the polyurethane-urea polymer.

A further batch is now mixed into this spinning solution. It consists of 14.3 parts of 22% spinning solution, 14.2 parts of an 11.4% by weight suspension of Mg stearate and 1.62 parts of an ethoxylated polydimethylsiloxane, Silwet L 7607 from Witco Surfactants. The dosage to the polymer solution to be spun takes place in such a way that the Mg stearate content in the finished fiber is 0.4% by weight is.

Rewinding on precision winding:

Rewinding from wild wound cylindrical spools to precision wound ones biconical bobbins are made using a 5-digit Conorapid bobbin winder average take-off speed of 550 m / min. The bobbin is withdrawn via Head, the material is wound on cores of 160 x 73 mm.

Production of pantyhose waistbands and measurement of pantyhose waistbands (Table size):

The tights are made on a 4-system type 301 Lonati knitting machine. A polyamide 44 dtex f 13 with a bond number of 3: 1 is used as the base material. Processing takes place at a knitting machine speed of 400 revolutions / min. Depending on the titer used, the elastane thread is passed through a Plasmeca tension regulator before it enters the knitting machine. The thread brake is set for elastanes with the titer shown on the left: Dtex 150 3.2 Dtex 195 3.6 Dtex 230 3.8 Dtex 270 4.0 Dtex 320 4.0

5 stockings are produced from each test setting and then the Waists measured in a relaxed state. The averages from these 5 measurements Collar dimensions are referred to as table dimensions and represent an important processing criterion for the processing hosiery industry. "Table size, outside "means that the knitted socks were made from the outer layer of the bobbin, "Table size, middle" means the stockings were made from spool material at which the bobbin was pulled off to about half the winding weight and "Table size, inside" means that the stockings are made of elastane, the Coils originated, which were stripped to around 100 to 150 g winding weight were.

Example 1 (not according to the invention. Standard method)

The elastane spinning solution described above is spun into a thread of 195 dtex by means of the dry spinning process. For this purpose, the spinning solution is pressed through a nozzle with 24 holes with a diameter of 0.3 mm, in a 5 m long spinning shaft which is heated to 230 ° from the outside and is also charged with approximately 390 ° hot air from above. The 24 individual capillaries created in this process are combined to form a coalesced filament yarn by means of a swirl organ attached under the shaft mouth. Subsequently, this yarn, which is drawn out of the shaft at a constant speed by means of a diverting godet, whose speed of rotation is 480 m / min, and provided with the silicone oil Baysilone M 20 via a roller preparation (diameter of the roller 8 cm, speed of rotation: 20 revolutions per minute) and then on an SSM Digicone winder from Schweiter using the Digicone process described in Melliand Textile Reports 6 , 1985 page 408 ff. and a winding speed of 540 m / min. wound. In order to produce a bobbin with a weight of 1 kg, for example, spinning is carried out for 95 minutes, then the thread run is interrupted, the full bobbin is removed, a new empty tube is placed on the winding mandrel and the thread is put on. The time recording is restarted and the wrapping process starts again.

As described in the previous section, the threads will then become Made tights and determined the corresponding table dimensions. Likewise the preparation is applied along the thread wound on the bobbin (see Figure 1) measured. The one furthest in the diagrams (Figures 1 to 5) The value on the right indicates the oil application in the area of the thread length corresponds to about 100 g of residual winding on the spool.

1 shows the preparation oil distribution after 4 days, 11 days, 26 days and 55 days depending on the thread length for different bobbins produced in the same way. Outside center Inside Table dimension after 1 day storage time of the coil 11.0 cm 11.6 cm 11.6 cm Outside center Inside Table dimension after 26 days of storage of the spool 10.8 cm 11.6 cm 11.6 cm

In this case, the oil application in the first 2,000 m is significantly lower than in the Coil inner layer, in the further outer coil layer, in the same order of magnitude as in the inner layer of the coil (see FIG. 1), and there are, both after a short (1 day) as well as longer storage time of the spool (26 days) table size differences of over 0.5 cm measured between the inner and outer layer of elastane garters, so that there is no satisfactory processing of this product at any time is.

Example 2

As described in Example 1, an elastane spool is made with a thread of fineness Made 195 dtex. This time, however, for 80% of the life of the coil Preparation godet speed to 10 rpm and for the last 20% of the coil run time set to 28 rpm. Do you want e.g. Make spools with a weight of 1 050 g, this means that the rotation of the preparation godet for 80 min at 10 Must run rpm and then at 28 rpm for 19 min. Then the Coils removed and the process restarted. Depending on the life of the coil the oil application in the outermost 15,000 spool meters between 13% and 19% of the Total weight of the coil and in the inner layer at approx. 7% of the total weight of the Kitchen sink.

The oil application quantities shown in Fig. 2 are according to those specified there Storage times of the bobbins are then measured along the thread path.

The table dimensions that result when the bobbins are knitted after different storage times are given in the following table: Outside center Inside Table dimension after 1 day storage time of the coil 11.4 cm 10.9 cm 10.9 cm Table dimension after 7 days of storage of the coil 11.2 cm 11.2 cm 11.1 cm Table dimension after 25 days of storage of the spool 11.2 cm 11.1 cm 11.2 cm Table dimension after 60 days of storage of the spool 11.1 cm 11.2 cm 11.2 cm

It can be seen that the table size differences after only 1 day of storage of the coil only 0.5 cm between the inner and outer layer. In contrast to those in example 1 (comparison) coils described, the table size is initially higher when processing the elastane of the spool outer layer compared to material made of elastane Inner layer. If the spool is stored for a longer period, it will be the same as the table size of the Material made of elastane on the inner layer. It is much more important that after storage times of over a week, as practiced between manufacturing the coil and processing occur at the customer, these differences are only 0.1 cm. The The quality of the coil increases with its storage time.

Example 3

As described in Example 1, an elastane spool with a fineness of 195 dtex is produced. This time, the preparation godet speed becomes 80% of the running time of the coil set to 9 rpm and for the last 20% of the coil running time to 31 rpm. Do you want e.g. Producing bobbins with a weight of 1 050 g, this means that one the rotation of the preparation godet must run at 9 rpm for 80 min and thereafter 19 min at 31 rpm. Then the coils are removed and the Process restarted.

The amount of oil residue shown in Fig. 3 is then at different Bobbins along the thread run after the specified bobbin storage times measured. Depending on the life of the spool, the oil application is in the extreme 10,000 Coil metal between 11% and 19% and in the inner layer at approx. 5%.

The table dimensions that result when the bobbins are knitted after different storage times are given in the following table: Outside center Inside Table dimension after 3 hours storage time of the coil 11.7 cm 11.0 cm 11.0 cm Table dimension after 7 days of storage of the coil 11.1 cm 11.0 cm 11.2 cm Table dimension after 14 days of storage of the spool 11.0 cm 11.1 cm 11.0 cm

It can be seen that even after storage periods of over a week, as in the Practice that occurs between manufacturing the coil and processing at the customer Make a table dimension difference between the inner and outer position of a maximum of 0.1 cm.

Example 4

As described in Example 1, an elastane spool with a fineness of 195 dtex is produced. This time the preparation godet speed becomes 90% of the running time of the coil set to 10 rpm and for the last 10% of the coil running time to 22 rpm. Do you want e.g. Producing bobbins with a weight of 1 050 g, this means that one must run the rotation of the preparation godet at 10 rpm for 90 minutes and then for 9 minutes at 22 rpm. Then the coils are removed and the process restarted.

The oil application quantities shown in Fig. 4 are then along the Thread run measured after the bobbin storage times specified there. Depending on the service life the oil application in the outermost 10,000 spool meters lies between the spool 5% and 9% and in the inner layer at approx. 4%.

The table dimensions that result when the bobbins are knitted after different storage times are given in the following table: Outside center Inside Table dimension after 1 day storage time of the coil 11.0 cm 10.9 cm 11.0 cm Table dimension after 11 days of storage of the coil 10.8 cm 11.0 cm 11.1 cm Table dimension after 26 days of storage of the spool 10.5 cm 11.0 cm 11.0 cm

It can be seen that after storage periods of over a week, as in practice between the manufacture of the coil and processing at the customer, the table size differences between 0.3 and 0.5 cm between the inner and outer layer, Values that are still tolerable for regular processing and the status of Correspond to technology for rewound goods. The complex rewinding falls however gone.

Example 5 (not according to the invention; corresponding to US 5560 558) 99.5% with 20 rpm 0.5% with 0 rpm

If, for example, you want to produce bobbins with a weight of 1 050 g, this means that you have to run the rotation of the preparation godet at 20 rpm and switch off the preparation roller 30 seconds before the calculated end of the bobbin running time of 99 min, so that preparation does not have any length on the last thread meter more is applied. After the end of the bobbin running time, the bobbins are removed and the process can be restarted. Outside center Inside Table dimension after 4 days of storage of the coil ends down 11.5 cm 11.5 cm

In this experiment, no garters could be found from the outer layer of the spool be produced because the elastane thread when it enters the knitting machine demolished continuously. Further attempts were made with coils produced in this way therefore not employed.

Example 6 (comparison, prior art)

As described in Example 1, an elastane spool with a fineness of 195 dtex is produced. This time, however, the spool will be made as in the section after manufacture "Rewinding on precision winding" described rewound and only afterwards processed.

The oil application quantities shown in FIG. 5 are then along the Thread run measured.

The table dimensions that result when the bobbins are knitted after different storage times are given in the following table: Outside center Inside Table dimension after 1 day storage time of the coil 11.2 cm 11.5 cm 11.5 cm Table dimension after 7 days of storage of the coil 11.0 cm 11.6 cm 11.6 cm Table dimension after 25 days of storage of the spool 10.9 cm 11.6 cm 11.6 cm Table dimension after 60 days of storage of the spool 10.9 cm 11.6 cm 11.6 cm

During a day of storage of the coil, the table size differences between The inner and outer layers of the coil are still comparatively moderate, they also rise here after a longer storage time up to 0.7 cm, so that after long storage too this, according to the state of the art coils, no perfect processing more is guaranteed.

Claims (8)

1. Elastane packages on cylindrical tubes, consisting of elastane filaments provided with a finishing oil by way of an outer coat, characterised in that the finishing oil content is increased on the outermost part, constituting at least 3 %, preferably at least 5 %, with at least 10 % being particularly preferred, of the elastane filament wound onto the tubes such that the content of finishing oil applied to the filament surface in this region constitutes at least 1.2 times, preferably 1.5 times the content of the finishing oil applied to the surface of the filaments in the inner region of the package, in particular in the region of the part of the innermost package filaments constituting at least 20 %.
2. Elastane package according to Claim 1, characterised in that the elastane package is a pineapple elastane precision package produced according to the digicone method.
3. Elastane packages according to Claim 1 or 2, characterised in that the content of finishing oil on the outermost part of the package is increased with respect to the part of the innermost package filaments constituting at least 30 %.
4. Elastane packages according to any one of Claims 1 to 3, characterised in that the elastane filaments have a total titre of 100 to 350 dtex, preferably of 130 to 270 dtex.
5. Elastane packages according to any one of Claims 1 to 4, characterised in that the content of finishing oil applied to the surface of the filaments in the outermost part of the filament length, constituting at least 3 %, remains increased over a period of at least 25 days, in particular at least 55 days, after producing the packages with respect to the inner part of the filament length constituting in particular at least 20 %.
6. Method for producing elastane packages according to any one of Claims 1 to 5 through spray finishing, a one-way finish or a coat of finishing oil by means of finishing rolls, characterised in that, when applying the finishing oil to the elastane filament to be wound onto a package, the outer 3 %, preferably 5 %, of the filament intended for the outer layer of the package is provided with at least 1.2 times the content of finishing oil as the innermost part of the filament, in particular the part of the filament constituting at least 20 % of the package, by increasing the feed of finishing oil to the filament.
7. Method according to Claim 6, characterised in that the finishing oil is applied directly after the elastane filaments have been spun, in particular in the lower region or at the outlet of the spinning chamber.
8. Use of the elastane packages according to any one of Claims 1 to 5 to produce underwear, support garment and bathing wear materials and to produce hosiery bands, sock tops or elastic tape.

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