KR20010071010A - Method for high-speed false twist texturing - Google Patents

Abstract

The invention relates to at least one water soluble lubricant (A) and to one water insoluble liquid (B) having a viscosity of 2 to 50 mPas (20 ° C., measured according to DIN 53015), and possibly emulsifiers and / or wetting agents and other additives. A process for the processing of yarns made of synthetic filaments, wherein the containing workpiece is applied to the yarns in the form of an aqueous emulsion, and then the filaments are processed according to the combustible principle on a machine with an instant hot heater.

Description

{METHOD FOR HIGH-SPEED FALSE TWIST TEXTURING}

The present invention relates to a fast false twist processing method for synthetic filament yarns and to the use of any finish for the processing method.

Since the early 80's, fine bulk polyester yarns (PES) for such applications as garment or furniture exteriors have been produced mainly by the so-called POY (partially oriented yarn) spinning process after twisting and stretching. Has been.

In false stretch processing, PES-POY yarns are stretched and bulked simultaneously. Bulk is provided by vigorously twisting the yarn in plastic and un-twisting after cooling. The plastic state of the yarn is achieved by passing the yarn through the contact heating rails. The twist is usually provided in ceramic or polyurethane friction discs (twisting units). Recently, the speed of flammable stretching (FT) has been gradually increased (a description of the basic principle can be found in HKRouette, Lexikon der Textilveredlung , 1995, 1524-1531 and 2180-2183). By the mid 90s, speeds of 700 m / min to 900 m / min were common for standard use. In order to achieve this speed, it was necessary to use the longest heating rail (> 2.5 m) which is usually heated by diphyl. The cooling rails also became longer by more than 1.5 m. The machines became correspondingly large and difficult to work with. In the early 90's, combustible telecompressors, much compressed, appeared on the market thanks to the use of new burners. By reliably reducing the length of the filament passage in the machine, the increase in tension is increased and the potential for increased speed is increased. In contrast to conventional contact heaters with temperatures between 180 and 230 ° C., new heaters with temperatures> 500 ° C. are operated substantially without contact. Due to the very high temperatures, the new heater can be reduced to a length of about 1 m. Although the maximum speed that can achieve the generation of hot machines is usually 1500 m / min, it has been found that in practice it rarely exceeds the speed of 900 to 1,000 m / min. The reason for this is the very high yarn break rate that occurs at high speeds. It is known that the yarn break rate increase usually precedes the spike in yarn tension peaks. Thus, there has been an urgent need for PES-POY yarns that can be processed in new high temperature heater processors which tend to have a clear decreasing tendency to tension peaks and therefore breaks.

In addition to improvements in yarn and spinning processes, workpieces that are applied to the yarn during spinning and which have a primarily lubricating effect are also optimistically contemplated. EP 826 816 A2, for example, describes workpieces for use in the combustible processing of synthetic yarns containing any polyether compound which is mixed with cyclic polyorganosiloxanes in selected amounts. However, even with the workpiece, it is only possible to achieve a speed of 1,000 m / min, in particular polysiloxanes at temperatures between 350 ° C. and 500 ° C., being thermally oxidative as hard silicate adhesives on yarn guides of high temperature heaters. Because it is degenerated into.

The problem described by the present invention is to provide a workpiece for combustible processing of synthetic yarns, which can be used under high speed combustion processing conditions, in particular instantaneous hot heaters, which substantially reduces the value of yarn breaking rate.

It has now been surprisingly found that the addition of selective water soluble low viscosity components to lubricants known per se results in a workpiece that meets the desired requirements.

In a first embodiment, the present invention relates to a water-insoluble liquid (B) which is at least one lubricant (A) and a viscosity of 2 to 50 mPas (measured according to DIN 53015 at 20 ° C.), and optionally an emulsifier and / or wetting agent. And a process containing synthetic auxiliaries in the form of an aqueous emulsion on the yarns, and then processing the filaments according to the combustible principle on a machine with an instant hot heater.

The water insoluble component (B) is particularly distinguished by its viscous action. Preferably, it is due to a low viscosity liquid with a viscosity in the range of 2 to 50 mPas, preferably 2 to 30 mPas and more particularly 5 to 25 mPas, measured at 20 ° C. according to DIN 53015 using a Hoppler viscometer. Particularly advantageous are water insoluble components (B) having a viscosity of 5 to 10 mPas.

Corresponding liquids are, for example, groups of water-insoluble esters of fatty alcohols having 16 to 24 carbon atoms and / or polyols having 2 to 6 carbon atoms and hydroxyl groups 2 to 6 and linear or branched, saturated or unsaturated C _6-22 fatty acids. Is selected from. Suitable fatty alcohols are, for example, palmityl, stearyl, arachidyl or behenyl alcohol. Suitable fatty acids include, for example, caprylic acid, pelagonic acid, capric acid, undecanoic acid, tridecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, Arachnic acid or behenic acid. Suitable polyols are, for example, glycols, diethylene glycol, glycerol, trimethylol propane or pentaerythritol. The polyols can be fully or partially esterified. The decisive factor is that the compound must be insoluble in water and at the same time satisfy the above mentioned viscosity characteristics. In the present specification, the water-insoluble compound is a compound in which 5% by weight or less and preferably 1% by weight or less are dissolved at 20 ° C. Particularly preferred water-insoluble compounds are esters of branched chain alcohols, for example obtainable by Guerbet or oxo synthesis with fatty acids, for example esters of C _16-18 fatty acids and 2-ethylhexyl alcohol, such as 2- Ethylhexyl stearate. Particular preference is given to linear fatty acids of the cut. In addition to the long chain esters above, methyl esters of linear or branched, saturated or unsaturated C _8-22 fatty acids are suitable liquids of type (B). Dicarboxylic acid esters, such as diisooctyl sebacate, diisotridecyl sebacate and diisooctyl esters of azelaic acid, and water insoluble reaction products of these compounds with ethylene oxide and / or propylene oxide may also be used as liquid ( B) can be used as. Thiopropionic acid and a water insoluble ester of, for example, 2-ethyl hexanol, decanol or isotridecyl alcohol, and a water insoluble reaction product of the compound with ethylene oxide and / or propylene oxide are also glycols, di Suitable as glycol or _triglycol and water insoluble esters of C _8-22 fatty acids and alkoxides thereof.

Other compounds suitable for liquid (B) are alkoxylated fatty acid esters corresponding to formula (I):

R ¹ -COO- (C _n H _2n O) _m -R ²

[Wherein R ¹ is a linear or branched, saturated or unsaturated C _7-21 alkyl group, R ² is a linear or branched, saturated or unsaturated C _1-12 alkyl group, n is 2 or 3 and m is 1 to 10 and Preferably 1 to 6]. Particularly preferred compounds of formula I are those wherein R ² is a short-chain alkyl group having 1 to 4 carbon atoms. Alkoxylation, preferably ethoxylated or ethoxylated and propoxylated esters can be obtained according to known methods, more particularly according to the teachings of WO-A-90 / 13533. In the case of mixed alkoxides, the alkoxylation can be carried out in random or block form.

Preferably water insoluble low viscosity liquids from the group of symmetric or asymmetric dialkyl ethers having 12 to 44 carbon atoms in total, for example dioctyl ether, didecyl ether or diisotridecyl ether, are also suitable liquids (B). Other suitable liquids (B) are dialkyl carbonates such as diisooctyl carbonate, dioctyl carbonate or diisotridecyl carbonate. Alkoxides of ethers may also be used provided they are insoluble in water and satisfy the viscosity characteristics. In addition to the above compounds, other kinds of compounds, more particularly poly-α-olefins such as poly-1-decene, or mineral oils, can be used as water-insoluble liquids (B) in the process according to the invention. Usually, liquid (B) may also contain a mixture of some of the liquids mentioned above.

In addition to the water-insoluble liquid (B), the workpieces used according to the invention are preferably water-soluble of polyols having 4 to 22 carbon atoms or hydroxyl groups of 2 to 6 and 2 to 6 carbon atoms with ethylene and / or propylene oxide. At least one lubricant (A) selected from the group of reaction products (molecular weights 750 to 50,000). Also suitable are water soluble reaction products of glycol, ethylene and diethylene glycol or propylene glycol with ethylene and / or propylene oxide in the molecular weight range of 750 to 50,000. Ethylene oxide and / or propylene oxide block adducts are preferably used. In this case, it is advantageous from the viewpoint of the water solubility of the compound that the fraction of the ethylene oxide groups is 35 (%) or more and preferably 45 (%) or more with respect to all the alkoxide groups in the molecule. For example, compounds from the water-soluble polyether polycarbonate group described in EP-0-743 992 B1 are also suitable lubricants (A).

Particularly preferred lubricants (A) contain the several reaction products described above. Thus, in one particularly advantageous embodiment, the workpiece comprises from 40 to 80% by weight of a water soluble reaction product having a molecular weight of 750 to 3,000, from 5 to 20% by weight of a water soluble reaction product having a molecular weight> 3,000 to 20,000 and a water soluble reaction product of a molecular weight> 20,000 to 50,000 Up to% by weight is contained as lubricant component (A). All the weight percentages are based on the lubricant (A).

The workpieces to be used in the process according to the invention preferably contain from 0.2 to 15% by weight and more preferably from 0.5 to 10% by weight of the water insoluble liquid (B). Lubricant (A) can be up to 99% by weight of the workpiece, although usually present in an amount of 30 to 90% by weight and preferably 35 to 60% by weight. In addition to components (A) and (B), the workpiece contains other optional ingredients, more particularly wetting agents and / or emulsifiers. Wetting agents are typically present in the workpiece at 3 to 20% by weight and emulsifiers at 5 to 30% by weight.

Suitable emulsifiers are any anionic, cationic or nonionic emulsifiers. Preferred emulsifiers are those which do not retain any inorganic residues below the prevailing temperature (ie 300 ° C. to 550 ° C.) in high temperature processing heaters. Particularly suitable are emulsifiers which have been completely decomposed (<0.2% ash) into a conventional incineration (900 ° C.) in a ceramic or platinum crucible. Thus, nonionic emulsifiers are particularly suitable. For example, fatty alcohol alkoxylates having less than 800 molecular weight, alkoxylated fatty acids, glycols or fatty amines and alkoxylated fatty amines are suitable.

Wetting agents used may be selected from any suitable compound known to those skilled in the art for spin processing. Water dispersible and especially water soluble compounds are preferably used. In addition to the above adjuvants, the workpiece may contain other typical additives, more particularly antistatic agents, filament compresses, pH adjusters, bactericides and / or corrosion inhibitors. If desired, the additive may be present in typical amounts in the workpiece. Usually they are present in a total amount of less than 15% by weight and preferably 1 to 10% by weight.

The workpiece is preferably used in the form of an aqueous emulsion containing 1-20% by weight and preferably 5-12% by weight of the workpiece in the process according to the invention. The emulsion is applied to the yarn in a conventional manner, i.e. in a lick roll or metering pump and applicator pin, and the yarn is then processed in a machine with an instant hot heater. Processing methods are described in the flammable principle and may optionally involve stretching. The claimed method is particularly suitable for combustible processing units which operate instantaneous high temperature heaters with little contact. The temperature of the high temperature heater is at least 300 ° C. in at least one zone. Thus, heaters of such machines are usually only 1 m or less in length. Suitable machines of this type are for example ICBT (e.g. ICBT FTF15 E2 HT), Teijin Seiki (Teijin Seiki HTS 1500 or HTS 15V), Barmag (e.g. Barmag AFK) or RPR (e.g. RPR 3 SDS) Available from. The high speed process in the context of the present invention is preferably to operate at yarn speeds above 600 m / min and preferably above 800 m / min and more particularly at 900 to 1500 m / min.

The workpiece is applied to the yarn by 0.25 to 0.45% by weight relative to the total weight by the process according to the invention. The workpieces are prepared by mixing the constituents mentioned in a known manner in any order with each other in the amounts indicated above at 18-35 ° C. and homogenizing the mixture with any known recipe.

Synthetic filaments, such as yarns of polyester or polyamide, preferably POY polyester yarns, are processed by the process according to the invention.

In another embodiment, the invention is a process equipped with at least one water soluble lubricant (A) and one water insoluble liquid (B) having a viscosity of 2 to 50 mPas as measured at 20 ° C. according to DIN 53015, and an instant hot heater. It relates to the use of a formulation containing emulsifiers and / or wetting agents and other auxiliaries as workpieces for the combustible processing of synthetic filament yarns in a machine. For this purpose, the formulation is preferably used in the form of an aqueous emulsion containing 1 to 20% by weight of the formulation, relative to the aqueous emulsion.

Example

In order to demonstrate the advantageous effects of the process according to the invention, the following workpieces are tested. The test workpiece consists of pack 1 and pack 2. Pack 1 is stored unchanged and the wetting agent (C _12-14 fatty alcohol ethoxylate containing 6 moles of ethylene oxide per mole of fatty alcohol), the high pressure lubricant (water soluble ethylene oxide / molecular weight 5,000 to 20,000 per pentaerythritol / Propylene oxide adducts), water soluble methyl capped polyethylene glycol pelagonate and C _16-18 fatty alcohol starting block ethylene oxide / propylene oxide emulsifier (ethylene oxide (EO per mole of fatty alcohol) ) 5 mol, propylene oxide (PO) 9 mol). Pack 1 constitutes 47% of the total workpiece. Pack 2, representing 53% of the total workpiece, consists of four components:

(I) Water soluble butanol initiated EO / PO adduct, MW about 1,000

(II) Water soluble butanol initiated EO / PO adduct, MW about 1,700

(III) Water Soluble Tetrol Initiated EO / PO Additive, MW approximately 7,000

(IV) 2-ethylhexyl stearate, 20 ° C. Viscosity: 15-17 mPas.

Component (IV) represents the water insoluble component (B) according to the invention of the workpiece. The composition of the test workpiece is set in Table 1. The combination of pack 1 and lubricants (I) and (III) is tested by reference.

(Number = weight percent) I II IV III Pack 1 Reference. 65.0 6.0 29.0 One 40.0 9.0 5.0 46.0 2 41.0 3.0 10.0 46.0 3 40.0 9.0 5.0 46.0 4 29.5 9.50 7.5 7.5 46.0 5 46.0 3.0 5.0 46.0 6 36.0 3.0 15.0 46.0 7 20.5 20.5 3.0 10.0 46.0 8 36.0 3.0 15.0 46.0 9 38.0 6.0 10.0 46.0 10 30.0 9.0 15.0 46.0 11 21.5 21.5 6.0 5.0 46.0 12 9.5 29.5 7.5 7.50 46.0 13 15.0 15.0 6.0 9.0 46.0 14 46.0 6.0 3.0 46.0 15 30.0 6.0 9.0 46.0

All workpieces mentioned above apply to typical PES-POY yarns during spinning. The additional amount is 0.3%. The main spinning parameters and POY data are as follows:

Spinning and POY Yarn Parameter 1:

Spinning Speed: 3500 m / min

Yarn Form: 256 dtex, 36 filaments

Strength: about 23.5 cN / tex

Elongation rate: about 103%

Finish: Barmag gear pump and ceramic applicator

Emulsion Concentration: 10%

Finishing amount added: 0.30%

After storage for more than 24 hours, all yarns are continuously stretched at the same 8 stations of the RPR SDS HTSH machine. Adjust the machining parameters as follows:

Machining Parameter 1:

Machine form: RPR 3 SDS

Friction Unit: Temco FTS 521 M

Unit Orientation: 1-6-1, Temco 630F 9 mm Polyurethane Work Disc

Elongation limit for fault alarm: +/- 2 cN

Winding speed: 1000 m / min

D / Y Ratio: 1.80

Extension rate: 1.61

Burner temperature: 500 ℃-first zone

500 ℃-second zone

Fixed heater temperature: power off

The following values are measured during processing (Tables 2a and 2b).

Workpiece Reference. One 2 3 4 5 6 7 t1 [cN] 79 82 82 80 80 80 83 78 t2 [cN] 56 53 52 56 53 53 52 54 t2 / t1 0.71 0.65 0.63 0.71 0.67 0.67 0.63 0.69 S _a t2 [cN] 0.5 0.5 0.4 0.4 0.4 0.4 0.4 0.4 CV [%] 0.8 1.0 0.8 0.7 0.8 0.8 0.8 0.8 Average olt / posit. 58.9 11.0 37.6 8.3 9.1 16.3 12.9 14.6 Denier [dtex] 167.4 168.0 164.2 168.7 169.8 164.8 168.2 164.9 Strength [cN / tex] 41.2 41.0 42.1 40.9 40.0 41.7 40.8 41.8 CV [%] 3.5 3.1 2.6 2.8 4.4 5.5 3.9 2.8 Elongation [%] 20.4 20.7 20.4 20.7 20.7 20.5 20.5 20.6 CV [%] 4.9 4.5 5.7 5.2 6.5 6.8 5.4 5.2 Crimp Shrink [%] 38.4 39.4 37.7 39.9 39.4 40.1 40.1 38.5 Crimp Stability [%] 88.9 89.3 88.2 89.8 89.5 89.7 89.5 88.9 Fluping [1/100 km] 7.5 5.0 7.5 0.0 7.5 0.0 15.0 7.5 Snalling [1/100 km] 0.0 2.5 2.5 0.0 0.0 0.0 0.0 0.0 Surging [m / min] 1150 1200 1150 1200 1150 1150 1150 1150

Workpiece 8 9 10 11 12 13 14 15 t1 [cN] 81 81 81 81 81 81 80 81 t2 [cN] 54 56 52 55 53 55 56 54 t2 / t1 0.67 0.70 0.65 0.69 0.65 0.68 0.70 0.67 S _a t2 [cN] 0.4 0.4 0.4 0.4 0.5 0.5 0.4 0.4 CV [%] 0.7 0.7 0.8 0.7 0.9 0.8 0.8 0.7 Average olt / posit. 21.6 9.6 4.7 16.9 7.0 1.63 15.6 2.5 Denier [dtex] 164.9 164.5 164.6 167.8 164.4 167.3 167.6 168.0 Strength [cN / tex] 42.0 42.4 42.4 41.1 42.4 41.5 40.9 41.6 CV [%] 2.6 2.5 2.7 4.0 2.6 3.1 9.3 3.0 Elongation [%] 21.1 20.9 20.9 20.6 21.0 21.0 20.4 21.0 CV [%] 5.0 4.9 4.7 6.8 5.5 5.5 5.9 4.9 Crimp Shrink [%] 38.3 39.0 38.9 39.2 39.4 38.8 39.2 39.4 Crimp Stability [%] 88.7 89.5 89.3 89.0 89.3 89.2 89.3 89.5 Fluping [1/100 km] 2.5 0.0 2.9 0.0 0.0 2.5 2.5 2.5 Snalling [1/100 km] 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Surging [m / min] 1150 1150 1150 1150 1150 1150 1150 1100

Acronym Description:

t1: Yarn tension before unit processing

t2: Yarn tension after processing the unit

t2 / t1: ratio between two tensions

Average olt / posit. : Tension limit number exceeds 4 hours

S _a : standard deviation

CV: coefficient of change

Surging: The rate at which a process becomes unstable

As shown from the results, the table, process and yarn data are at very good levels. In particular, the number of times of exceeding the tension limit, which is responsible for the yarn break rate, is clearly reduced compared to conventional workpieces.

In order to demonstrate the comprehensive effectiveness of the claims that the addition of a water insoluble liquid (B) to the workpieces reduces the frequency of yarn tension peaks, the following four workpieces are tested on another PES-POY spinning machine: see, 13 , 3 and 9.

Spinning and POY Yarn Parameter 2:

Spinning Speed: 3300 m / min

Yarn Form: 167 dtex, 30 filaments

Finish: Barmag Gear Pump and Ceramic Applicator

Emulsion Concentration: 10%

Finishing amount added: 0.30%

Machining Parameter 2:

Machine form: Barmag FK6 V80 with high temperature heater

Friction Unit: Temco type 8

Unit orientation: 1-6-1, Hokushin 9 mm polyurethane work disc

Tension limit for fault alarm: +/- 3 cN

Winding speed: 900 m / min

D / Y Ratio: 1.8

Extension rate: 1.76

Burner temperature: 380 ℃-first zone

400 ℃-second zone

Fixed heater temperature: power off

result:

Workpiece Reference 13 3 9 Tension limit count exceeds 4 hours 108 18 17 18

In this case also, the advantageous effect of the process according to the invention in clearly reducing the frequency of tension peaks during the machining process is evident.

The test is carried out with another water insoluble low viscosity component (B). Workpiece 9 is selected as the base formulation (wt% quantification).

9 16 Viscosity (mPas) of component (B) at 20 ° C (I) 38.0 38.0 (III) 10.0 10.0 3-ethylhesyl stearate 6.0 15 to 17 Octyl caprylate 6.0 4 to 7 Pack 1 46.0 46.0

All four workpieces are applied on a POY spinning machine equipped with spinning and POY yarn parameter 2. The yarn is then processed on an RPR 2 SDS high temperature heater machine.

Machining Parameter 3:

Machine form: RPR 3 SDS

Friction Unit: Temco FTS 521 M

Unit Orientation: 1-6-1, Temco 630F 9 mm Polyurethane Work Disc

Tension limit for fault alarm: +/- 3 cN

Winding speed: 1000 m / min

D / Y Ratio: 1.76

Burner temperature: 500 ℃-first zone

500 ℃-second zone

Fixed heater temperature: power off

result:

Workpiece 9 16 Tension limit count exceeds 4 hours 36 25

It can be seen that the decrease in viscosity of component (B) also reduces the number of times of exceeding the tension limit and thus reduces the risk of yarn breaking rate.

Claims (16)

A workpiece containing at least one water soluble lubricant (A) and one water insoluble liquid (B) having a viscosity of 2 to 50 mPas (20 ° C., measured according to DIN 53015), and optionally emulsifying and / or wetting agents and other auxiliaries ( A method of processing a synthetic filament yarn, characterized in that the filament is processed according to the combustible principle in a machine with an instantaneous high temperature heater after the finish is applied to the yarn in the form of an aqueous emulsion. The process according to claim 1, wherein the workpiece contains a water insoluble liquid (B) having a viscosity of 2 to 30 mPas, preferably 5 to 25 mPas and more preferably 5 to 10 mPas, measured at 20 ° C in accordance with DIN 53015. Characterized in that. 3. The process according to claim 1, wherein the workpiece is a linear or branched, saturated or unsaturated C _6-22 fatty acid with a fatty alcohol having 16 to 24 carbon atoms and / or a polyol having 2 to 6 carbon atoms and hydroxyl groups 2 to 6. A water insoluble liquid (B) selected from water insoluble esters. 4. Process according to any of the preceding claims, characterized in that the workpiece contains liquid (B) selected from water insoluble C _16-18 fatty acid esters with 2-ethylhexyl alcohol. The process according to any one of claims 1 to 4, wherein the workpiece contains liquid (B) selected from the group of water-insoluble compounds corresponding to formula (I): [Formula I] R ¹ -C0O- (C _n H _2n O) _m -R ² [Wherein R ¹ is a linear or branched, saturated or unsaturated C _7-21 alkyl group, R ² is a linear or branched, saturated or unsaturated C _1-12 alkyl group, n is 2 or 3 and m is 1 to 10 and Preferably 1 to 6]. The process according to claim 1, wherein the workpiece is from a group of water-insoluble dialkyl ethers, dialkyl carbonates, dicarboxylic acid esters, diesters of thiodipropionic acid, poly-α-olefins or mineral oils. Characterized in that it contains the selected liquid (B). The water-soluble reaction product (molecular weight 750) according to any one of claims 1 to 6, wherein the workpiece is a C _4-22 fatty alcohol or a hydroxyl group of 2 to 6 and a polyol having 2 to 6 carbon atoms with ethylene and / or propylene oxide. To at least one lubricant (A) selected from the group of: 50,000). 8. The reaction product according to any one of claims 1 to 7, wherein the workpiece has a reaction product of 40 to 80% by weight of the reaction product having a molecular weight of 750 to 3,000, 5 to 20% by weight of the reaction product of a molecular weight> 3,000 to 20,000 and a molecular weight of> 20,000 to 50,000. A lubricant (A) containing 5% by weight or less. The method according to any one of claims 1 to 8, wherein the workpiece contains 0.2 to 15% by weight and preferably 0.5 to 10% by weight of the water-insoluble liquid (B) relative to the workpiece. 10. The workpiece according to claim 1, in addition to components (A) and (B), contains 5 to 30% by weight of an emulsifier and / or 3 to 20% by weight of a wetting agent relative to the workpiece. Characterized in that the method. Process according to any of the preceding claims, characterized in that the workpiece is used in the form of an aqueous emulsion containing 1-20% and preferably 5-12% by weight of the workpiece relative to the aqueous emulsion. . The method according to claim 1, wherein the workpiece contains other typical additives such as antistatic agents, yarn compresses, bactericides and / or corrosion inhibitors. The process according to claim 1, wherein polyester filament yarns are selected. 14. A process according to any one of the preceding claims wherein the workpiece is applied to the yarn in an amount of 0.25 to 0.45% by weight relative to the weight of the yarn. Workpiece for combustible processing of synthetic filament yarns in processing machines with instant hot heaters, at least one water-soluble lubricant (A) and one water-insoluble with a (Brookfield) viscosity of viscosity 2 to 50 mPas (20 ° C.). Use of a combination comprising liquid (B) and optionally emulsifiers and / or wetting agents and other auxiliaries. Use according to claim 15, characterized in that the formulation is used in the form of an aqueous emulsion containing 1 to 20% by weight of the formulation.