DE2726438C2 - Yarn oil for re-oiling textured, fine socking yarns - Google Patents

Description

The present invention relates to a yarn oil for re-oiling textured, fine socking yarns.

It is generally known that during the draw texturing process in the production of fine, textured sock yarns, the oil content of the yarn is approx. 0.8-1% decreases to approx. 0.1%. This is due to the fact that the lubricant component of the spin finish is almost completely in the texturing heating zone evaporates, especially if it is a so-called highly volatile "fuming" spin finish, as it is especially preferred for the friction stretch texturing technique. A textured yarn with an extremely low oil content would lead to processing difficulties for the customer on the knitting machines, for example due to electrostatic charges, poor drainage properties and abrasion. For these reasons it has has proven itself and it is the general state of the art to cut the yarns on the texturing machine with a Refill yarn oil, a so-called »flushing oil«.

The composition and the amount of oil applied by the flushing oil result from a series of very special requirements. For example, the flushing oil must give the yarn the best possible sliding properties, antistatic properties, convey excellent running properties and favorable storage properties. Beyond that, it must be technically good and safe to use in production.

The application, namely the use as an anhydrous or almost anhydrous oil, results in special requirements for the composition of the flushing oil. So the viscosity should be relative low, of the order of 20-100 mPas (at 20 ° C) and do not change during longer operating times, because otherwise different oil applications will be achieved with the same roller speed. The composition of a rinsing oil does not differ fundamentally from that of a spin finish. The »classic« lubricants are known to use mineral oils. Because of certain disadvantages, especially because of theirs Volatility, and because of thread migration, is a trend towards the transition to, for example, ester oils recognize. The emulsifier proportions are usually low, as there is no need for a stable "water in oil" emulsion.

The previously customary combinations of lubricant-emulsifier-antistatic agent are known to be used in in many cases contain up to 15% water, which is necessary to form a clear solution.

In addition to the known, yarn-improving properties, those known and used so far have But there are also certain disadvantages:

For example, in certain commercially available flushing oils, the sliding components are relative volatile or able to penetrate the thread polymer, which is particularly important after longer storage times FaIi is. The consequence of this are problems with the process of the head, high electrostatic charges on the Hosiery machines and abrasion, which soils the needle contours and deflection elements, cause high thread tensions, which ultimately leads to an inability to process due to the high number of thread breaks leads. For other types of flushing oil η is the On the other hand, the viscosity of the lubricant component is so high that at high processing speeds on the automatic stocking machine the friction on the Umlenkorganen finally becomes so high that processing becomes impossible here too, and again more inefficient, slower working speeds must be set. In addition, with such flushing oils, the incorporation of the Hosiery machines so unevenly that the resulting stocking lengths are different in their raw dimensions, which causes difficulties with the subsequent sewing technology, especially on the modern Takatori sewing machines exact seam.

The proportion of poorly sewn stockings can be considerable, which leads to a relatively high waste rate. If the sliding component of the flushing oil is too smooth, on the one hand the thread cohesion of the filament bandage is too low and, on the other hand, it is Adhesion of the individual thread layers to the thread body is too low. The lack of thread cohesion leads, especially in the modern, rational so-called onepiece automatic stocking knitting machines, to the necessary, loose knitting of the gusset parts single capillaries not detected (filamentation) lead to considerable knitting errors. The insufficient mutual adhesion of the threads on the yarn body can finally, because of falling layers of thread or uncontrolled caster, the so-called hanging processing on the stocking machines, as is the case with many Preferred by hosiery workers.

Other disadvantages are e.g. B. pushed washability due to insufficient emulsion stability m the aqueous dye liquors. The consequence of this are bad, unegais dyeings or the necessity of pre-washes. As further disadvantages of known through-wound oils, the spraying off of thread guides and deflection elements as well as should be mentioned insufficient biodegradability. In addition, the water-containing flushing oils are compatible with the The disadvantage is that when the water component evaporates, its viscosity changes in an uncontrolled manner and / or give rise to precipitations or deposits, or the corrosion of machine parts to promote due to rust formation.

The object of the present invention is now to provide a yarn oil or flushing oil for textured, fine To develop sock yarns that give the yarn excellent running properties even with very little oil application, i.e. H. evenly low drainage tension

from the head as well as uniformly low inlet tension in the stocking machine, high antistatic and low friction properties, even after longer storage times of 2 and more years, mediated, whereby the outer layers of the cops also dry out is not to be feared.

In particular, the yarn properties should be such as thread cohesion, yarn body adhesion and sliding properties be coordinated in such a way that perfect workmanship, even using the most modern hosiery techniques and stocking sewing techniques for different requirements, is guaranteed, such as on the high-speed, high-speed machines at working speeds of up to 800 m / min or on the modern ones one-piece stocking knitting machines or with the modern, automatic Takatori sewing technology.

This object is achieved by a yarn oil consisting of

a) 65 parts of i-butyl stearate,

b) 15 parts of an adduct of 5 mol Ethylene oxide an i Moi La urinal kohoi

c) 15 parts of an adduct of 7 moles of ethylene oxide and 1 mole of i-nonylphenol and

d) 5 parts of a complex phosphoric acid ester, obtained by phosphating a laurylpene glycol ether, Implementation of the ester formed with ethylene oxide to the tertiary ester and renewed phosphating.

The yarn oil is used to produce fine, textured filament yarns for the hosiery industry from synthetic, thermoplastic high polymers such as polyamides, polyesters and polyo'efins according to the usual, known stretch texturing process with improved properties in addition to durability and further processing on stocking machines and / or sewing machines.

The aforementioned, anhydrous, special mixture according to the invention forms a clear, almost colorless one Rinse oil, which has an almost unlimited shelf life and is made by the following physical methods measurable quantities can be characterized and controlled:

The viscosity at 20 ° C is 23 mPa s, the density at 20 ° C 0.900, the refractive index n _R ^2D 1.4568. The biodegradability is checked by BOD-20 determination according to the German standard method and amounts to 68%.

The inventive flushing oil is by means of Rolling or according to the methods of disposable preparation (e.g. DE-OS 2359276) immediately afterwards to the actual stretch texturing process and before winding in an amount of 0.8 to max. If desired, 1% can also be applied undiluted to the threads.

A particular advantage of the flushing oil according to the invention is the excellent constant viscosity to be mentioned, as due to the absence of water in the composition, evaporation, even with increased, process-related room temperatures are excluded.

The complex phosphoric acid esters used according to the invention are described in detail in DE-AS 2134854 described.

The advantage of the yarn oil according to the invention is an excellent storage stability of the textured yarns treated therewith. For example, after 1-2 years, even with fluctuating climatic conditions, the processing properties are still good. The loss of oil due to volatilization or migration, is extremely small and is of the order of magnitude of the accuracy of the analysis. the

"'Knitting yields on all standard hosiery machines, including high-speed stocking machines and one-piece machines, also with the so-called preferred hanging processing, are excellent. The machine stops in

The consequence of knitting errors is negligible. A twisting of the stockings in the exhaust pipe is largely excluded, the ejection from the cassette runs smoothly.

The stockings made are special

ι> stocking lengths, very even in the raw dimensions, so that they match in pairs quickly and exactly, placed congruently on top of one another and, for example, using the automatic Takatori sewing technique smooth and flawless with extremely dimensionally accurate

- '· Seams can be sewn. In the following In the dyeing process, the oil can be washed out completely and well in the aqueous liquor, so that it is good and level Dyeings are made possible without pre-washing. At the same time, because of the uniform and slender

^ i ken yarn character the disturbing influence on reason the so-called burdock effect of individually protruding curling arcs of isolated capillaries is almost completely suppressed. The biodegradability of the lubricant based on a fatty ester product is given and of

ι »great benefit in relation to the upcoming environmental protection legislation. The winding oil according to the invention is simple and safe to use; disturbing dripping down on the floor and none

Jj symptoms of opacity even after prolonged periods of use. The preparation rollers also show after long periods of operation of several months no network difficulties or deposits.

example 1

65 parts of i-butyl stearate

15 parts of an emulsifier, which was produced by the catalytic addition of 5 moles of ethylene oxide to one mole of lauryl alcohol,
15 parts of an emulsifier, which was produced by the catalytic addition of 7 moles of ethylene oxide to one mole of i-nonylphenol,

as

5 parts of a complex phosphoric acid ester, according to DE-AS 2134854, as obtained by phosphating of a lauryl pentaglycol ether, reaction of the ester formed with ethylene oxide to form the tertiary ester and repeated phosphating is obtained,

were mixed thoroughly with stirring.
5> The practically colorless flushing oil produced in this way has the following physical, characteristic parameters:

The viscosity at 20 ° C is 23 mPa s, the

Density at 20 ° C 0.900, the refractive index n _R ^w

t> o 1.4568. The biodegradability is checked

by BOD-20 determination according to the German standard method and is 68%.

Example 2

bj For the production of a textured split length yarn of titer dtex 22 f 5 made of polyamide 6 I for fine stockings The Duirchspulöl according to the invention described in Example 1 or fine tights is used

in the post-oil system of a normal, commercially available Given a draw texturing machine. The texturing takes place according to the principle of the simultaneous internal friction method, Spinning bobbins of raw denier dtex 66 f 5 for a final denier dtex 22 f 5, Das The stretching ratio is set accordingly to a ratio of 1: 3.0. The outlet speeds are 600 m / min.

The speed of rotation of the oil rollers is set so that a thread layer of the fresh textured, fine hosiery yarn in cop make-up on average 0.8% with a fluctuation range from 0.6-1%. The winding hardness is programmed with a spindle of 55-60 Shore. After a storage time of the textured sock yarn produced in this way with a dtex 22 f 5 titer of 6 months Under normal storage conditions in a room climate, the bobbins become one with hanging processing 4-system stocking knitting machines presented. Run at working speeds of 600 m / min also the top layers of the cops according to the invention without any problems, up to the last layer on the cop; the thread reserve easily initiates the transition to the next cop.

The dimensions in the longitudinal and transverse dimensions are based on both the raw stocking and the finished stocking conforming well to the equipping process.

An analytical oil determination method gives a after the aforementioned 6-month storage period oil content of 0.7% of the cop material.

Example 3

For the production of a textured trouser yarn of titer dtex 44 f 10 from polyamide 6 for fine stockings or fine tights, the procedure is generally as in Example 2, but serves as a supply bobbin a spinning material of raw titer dtex 132 f 10 for a final titer of titer dtex 44Π0.

The applied oil content of the flushing oil according to the invention is 0.8%. The trouser yarn produced in this way in coping is used together with the length yarn produced in Example 2 for Production of complete stockings with a 4-system automatic knitting stocking machine at 480 rpm and standing Processing submitted. The thread unwinding tensions are relatively close together and are each for the outer layers for the dtex 22 f 5 0.1-0.3 p, for the dtex 44 f 100.3-0.4 p. The corresponding Infeed tensions in the stocking machines are also very even and amount to the titer dtex 22 f 5 0.4-0.9 ρ and for the titer dtex 44 f 10 0.8-2.1 p.

The knitting reliability is excellent, thread stops due to knitting errors did not occur; the machine yield per unit of time of flawless stockings is 99%, based on the theoretical Value.

The individual raw stocking lengths that have been preserved are in good agreement in terms of their dimensions and can be used Put them in pairs on top of each other without any problems. In a preferred processing method, the obtained Raw stockings before being put on top of each other in pairs using a so-called rocketing process short shaped. The paired, almost congruent, superimposed single stockings are now pushed onto the mounting arm of a Takatori sewing machine. When spreading into the sewing position,

The edges of the stocking are congruent, without the slightest distortion, and are called the sewing shoe recorded safely. The seams are very precise down to the last stitch. The next ones are just as safe Operations such as cutting and filing. The finished, raw, complete tights are now placed on top of each other in predetermined dozen units and put in the so-called dye pack in the dye liquor given. After dyeing and tumbling dry, the tight-fitting tights can be removed Separate them perfectly without so-called pulling (picks and puis) and pack them without any problems. the Ausfärbur.gen are very evenly, the dye liquor no oil admixtures are to be noted.

Example 4

The procedure is basically as in Example 3, but processing is carried out according to the invention sock yarn manufactured using the so-called one-piece technique on a modern one-piece machine with hanging processing. Π -. =. · .- working speed is 350 m / min. The tir-iautensions are very uniform and amount to 0.3-0.7 ρ for the titer dtex 22 f 5 and for the titer dtex 44 f K) 0.6-1.5 ρ in relation to the outer layers. It will be polyamide 5 yarn used. When the machine or system stops, the thread layers adhere well to the thread body, Falling thread layers or thread layer trailing are not observed.

Starting from the 1st stocking foot tip, the Processing over the length part up to the knitting of the trousers part including the special loosely knitted gusset parts and finally over the 2nd length part to the 2nd tip of the foot without any problems and error-free with a high level of utilization of the machine. The machine usage is 98%, based on the theoretical values.

The one-piece tights produced in this way show good recovery potential after finishing with excellent fits. The corresponding expansion dimensions are all within the specified standard.

Comparative example! 1

4 ~ <The procedure is basically as in example 2, however, instead of the flushing oil according to the invention, an oil is used on the basis of a lighter one volatile mineral oil fraction with the following key figures:

viscosity
Refractive index
density

at 20 ⁰ C: 5,9mPas at 20 ° C: 1.4641 at 20 ° C: 0.820.

The volatility of the mineral oil is: residue in% 95 90 80 70

at temp. ° C 140 157 175 187

These values were determined by thermo _b0 gravimetric analysis as follows. For this purpose, 50 mg of the substance are weighed into a platinum basket and heated under a nitrogen flow of 0.2 liters per minute at a heating rate of 10 ° C. per minute. At the same time, the weight loss is gravimetric profiled kontrol _h5. The result is information about the amount of residue at certain temperatures.

The coefficient of friction is 0.32 and the following method is used to determine it: One

A ¹ ^ ige solution of the substance to be tested in isopropanol is applied to a preparation Perlon filament dte. 44 f 9. This results in an oil application of i), H% on the Perlon filament. After a conditioning time of 3 days at 2.1 "C and 50% relative humidity, the coefficient of friction of the filament is measured with an F-meter, the bias being 5 p, the deflection angle 180 ° C, the measuring speed 20 m per minute and as a friction body an agate stick of 10 mm diameter is used.

The oil application of the freshly produced single-length yarn of denier earth tex 22 f 5 amounts to i), H ^r ' _r . After a period of Λ months under normal storage conditions, the bobbins are processed on a normal knitting machine. In the process, membranous thread breaks appear on oruntl of dried-on toppings. In doing so, twisting of the stockings in the so-called suction tube reads automatic stocking machines as a result of excessive electrostatic charges. In addition, deposits form on the deflection organs and on the needle roller and cage assemblies, which lead to further knitting difficulties and thread breaks. The <ilgehalt the cops, ilei / u difficulties gave rise. was only only 0.1 ''. Overall, mch resulted in a proportion of around ΙΟ'ί defective bobbins.

Comparative example 2

Hs is basically proceeded as in example .1, ! «- but instead of the through- • ■ piilöles an oil used on the basis of a poorly lit mineral oil fraction with the following key figures

The volatility of the mineral oil, determined by your Comparative example I described method, contributes:

Backlog in ", 95

80

70

at temp. 'C 20 «224 241

252

viscosity

Refractive index

density

at 20 C: VVS mPa
at 20 C: 1.4692
at 20C: U.K45.

The coefficient of friction, determined according to the Staiulardmelhode given in Comparative Example I. lic carries 0.45.

The Olgehall is approx. 1.5'v. Even after a l.ager / eit of 6 months, the oil content is almost unchanged, he cheats l, 4 ^r i. On the 4sy- '. Temigen Strickautcuiaten, with knitting gears of 4HO rpm, the inlet spans are inconsistent and the tension peaks at the reversing parts are for ile liters iite \ 11 I ^ up to Λ p. for the Tiler dtex 44 f K) liis to 4 μ min and again the machine stops due to a load breakage. especially with i.ku increased thread tension when the last thread layer has run off from the cop in connection with the thread reserve or cop transition.

Some of the pieces that have been preserved show different raw dimensions, and when they are laid on top of each other, the edge of one of the stocking stands up to ^! cm across. When pushed onto the facator arms, the larger, unusual vaccine shows a slight ripple. When the activator arms are spread out into the working position, the waviness of the "large" F-mzel triimple remains, the sewing foot only partially grasps the parts to be sewn, and very often the seam slides out of the guide in an uncontrolled manner, which then leads to faulty seams . The Aiistalliiuote determined in this way was KKy.

Claims (1)

Claim: Yarn oil for re-oiling textured finer Stocking game, consisting of a) 65 parts of i-butyl stearate, b) 15 parts of an adduct of 5 mol ethylene oxide with 1 mol lauric alcohol c) 15 parts of an adduct of 7MoI ethylene oxide with 1 mole of i-nonylphenol and d) 5 parts of a complex phosphoric acid ester obtained by phosphating a Lauryl pentaglycol ether, reaction of the ester formed with ethylene oxide to form the tertiary ester and renewed phosphating.