DE19833305A1 - Procedure for high speed false wire texturing - Google Patents

Abstract

The invention relates to a method for texturing yarns made of synthetic filaments, according to which a preparation containing at least a water-soluble lubricant (A) and a water-insoluble liquid (B) having a viscosity of between 2 and 50 mPas (20 DEG C, measured according to DIN 53015), and possibly emulsifiers and/or wetting agents and other additives is applied onto the yarn in the form of an aqueous emulsion, after which the filaments are subjected to texturing in accordance with the false twist principle on texturing machines having a short high-temperature heater.

Description

Field of the Invention

The present application relates to a method for high speed false wire texturing of yarns made of synthetic filaments and the use of a specific preparation for this texturing process.

Fine, bulky polyester yarns (PES) have been used for applications such as Clothing or upholstery fabrics mainly based on the so-called POY spinning process (partially oriented yarn) with subsequent false wire stretch texturing.

In the false wire stretch texturing, a PES-POY yarn is stretched at the same time and with bulk Mistake. The bulk is created by twisting the yarn intensively in the plastic state is then untwisted again in the cooled state. The plastic state of the yarn will achieved in that it is guided over a contact heating rail. The thread becomes predominant by means of friction discs made of ceramic or polyurethane (twisting unit). In recent years the speed of the false wire stretch texturing process (FT) was steadily increased (see the explanation of the basics of H. K. Rouette, Lexikon der Textilveredelung, 1995, pages 1524 to 1531 and 2180 to 2183). Until the mid-1990s, speeds were between 700 m / min and 900 m / min common for standard yarns. To achieve these speeds, it was necessary, very long, usually with diphyl heated heating rails (up to over 2.5 m) use. The cooling rails also had to be extended to over 1.5 m. Corresponding The machines became bulky and difficult to operate. Came in the early nineties False wire stretch texturing machines on the market, which are essential thanks to the use of new heaters are more compact. The length of the thread run in these machines is significantly reduced, which is one Reduced voltage build-up and a potential for increased speeds. in the  Contrary to traditional contact heaters, whose temperatures were between 180 and 230 ° C, the new heaters work almost without contact, but with temperatures up to 500 ° C. thanks to the very high temperatures their length could be reduced to about 1 m. Although the mechanical achievable maximum speed of the high-temperature machine generation usually 1500 m / min, it was found that in practice 900 to 1000 m / min are rarely exceeded can. The reason for this is that the yarn breakage rates are greatly increased, and that at higher speeds occur. It is known that before the increase in yarn breaks, usually an increase in Yarn tension peaks can be observed. So there was an urgent need for PES-POY- Yarns that were significantly reduced on the new high-temperature heating texturing machines Tendency to voltage peaks and consequently to have breaks processed.

In addition to improvements to the yarns and the spinning process, the preparations used in the spinning must be applied to the yarn and mainly a lubricating effect exercise, examined for opportunities for optimization. EP 826 816 A2, for example, describes Containing preparations for use in false twist texturing of synthetic yarns certain polyether compounds in admixture with cyclic polyorganosiloxanes in selected proportions. However, even with these preparations in practice only Yarn speeds up to 1000 m / min reached, especially because at temperatures around 350 ° C to 500 ° C polysiloxanes for hard silicate deposits on the thread guides of the high temperature heaters be degraded thermo-oxidatively.

The object of the present invention was to prepare preparations for false-wire texturing of synthetic yarns, which also under the conditions of High speed false wire texturing, especially on texturing machines with short High temperature heaters can be used and the number of yarn breaks is substantially reduced.

It has now surprisingly been found that the addition of a selected water-insoluble low-viscosity component leads to the known lubricants for preparations that fulfill the required requirement profile.

In a first embodiment, a method for texturing yarns from synthetic Filaments claimed, on the yarns a preparation containing at least one water-soluble lubricant (A) and a water-insoluble liquid (B) with a viscosity of 2  up to 50 mPas at 20 ° C measured according to DIN 53015, as well as emulsifiers and / or network and other auxiliaries, applied in the form of an aqueous emulsion and the filaments then texturing according to the false wire principle on a machine with short High temperature heaters are subjected.

The water-insoluble component (B) is particularly notable for its viscosity behavior. Low-viscosity liquids with a viscosity in the range from 2 to 50 mPas are preferred, but preferably in the range from 2 to 30 mPas and in particular in the range from 5 to 25 mPas, measured at 20 ° C according to DIN 53015 on a Höppler viscometer. Especially Water-insoluble components (B) having a viscosity of 5 to 10 mPas are advantageous.

Such liquids are selected, for example, from the group of water-insoluble esters of fatty alcohols with 16 to 24 carbon atoms and / or polyols with 2 to 6 carbon atoms and 2 to 6 hydroxyl groups with linear or branched, saturated or unsaturated C _6-22 fatty acids. Suitable fatty alcohols are e.g. B. palmityl, stearyl, arachidyl or behenyl alcohol. Suitable fatty acids are, for example, caprylic, pearlagon, capric, undecane, tridecane, myristic, pentadecane, palmitic, heptadecanoic, octadecanoic, nonanoic, arachic or behenic acid. Suitable polyols are, for example, glycol, diethylene glycol, glycerin, trimethylolpropane or pentaerythritol. The polyols can be completely or partially esterified, it is crucial that the compounds are water-insoluble and at the same time meet the viscosity criterion mentioned above. In the context of this application, water-insoluble is understood to mean those compounds which dissolve at 20 ° C. to a maximum of 5% by weight, preferably to a maximum of 1% by weight. Particularly preferred are esters from branched chain alcohols, which are accessible for example via Guerbet or oxo syntheses, with fatty acids, e.g. B. esters of 2-ethylhexyl alcohol with C _16-18 fatty acids, such as 2-ethylhexyl stearate. In particular, linear fatty acids of this section are preferred. In addition to these long-chain esters, methyl esters of linear or branched saturated or unsaturated fatty acids of chain length C ₈ to C _{22 can also be} suitable liquids of type (B). Dicarboxylic acid esters such as diisooctyl sebazate, diisotridecyl sebazate and diisooctlester of azelaic acid and the water-insoluble reaction products of these compounds with ethylene oxide and / or propylene oxide can also be used as liquids (B). Water-insoluble esters of thiodipropionic acid, for example with 2-ethylhexanol, decanol or isotridecyl alcohol, and the water-insoluble reaction products of these compounds with ethylene oxide and / or propylene oxide are also suitable. The water-insoluble esters of glycol, diglycol or triglycol with C _8-22 fatty acids and their alkoxides are also suitable.

Other suitable compounds for the liquids (B) are alkoxylated fatty acid esters of the formula (I)

R ¹ -COO- (C _n H _2n O) _m -R ² (I)

where R ^{1 is} a linear or branched, saturated or unsaturated alkyl radical of chain length C ₇ to C ₂₁ , R ^{2 is} a linear or branched, saturated or unsaturated alkyl radical of chain length C ₁ to C ₁₂ and n is the number 2 or 3 and m stands for a number between 1 and 10 and preferably 1 to 6. Compounds of the formula (I) in which R ^{2 is} a short-chain alkyl radical having 1 to 4 carbon atoms are particularly preferred. The alkoxylated, preferably ethoxylated or ethoxylated and propoxylated, esters can be prepared by known methods, in particular in accordance with the teaching of WO-A-90/13533. In the case of mixed alkoxides, the alkoxylation can take place in random or in block form.

Furthermore, water-insoluble low-viscosity liquids from the class of symmetrical or unsymmetrical dialkyl ethers with preferably a total of 12 to 44 carbon atoms are suitable, for example dioctyl ether, didecyl ether or diisotridecyl ether. Also dialkyl carbonates, such as Diisooctyl carbonate, dioctyl carbonate or diisotridecyl carbonate are suitable liquids (B). Also If the alkoxides of the ethers are insoluble in water and meet the viscosity criterion, be used. In addition to these compounds, other classes of substances, in particular Polyalphaolefins, for example poly-1-decenes, or mineral oils as water-insoluble liquid (B) be used in the method according to the invention. In general, the liquid (B) is also a May contain a mixture of several of the above liquids.

In addition to the water-insoluble liquid (B), the preparations used in the process according to the invention contain at least one lubricant (A), which is preferably selected from the group of water-soluble reaction products of fatty alcohols with a chain length of C ₄ to C ₂₂ or of polyols with 2 to 6 hydroxyl groups and 2 up to 6 carbon atoms with ethylene and / or propylene oxide, the reaction products having a molecular weight between 750 and 50,000. Water-soluble reaction products of glycol, ethylene and diethylene glycol or propylene glycol with ethylene and / or propylene oxide which have molecular weights in the range from 750 to 50,000 are also suitable. Ethylene oxide / propylene oxide block adducts are preferably used, it being advantageous with regard to the water solubility of the compounds that the proportion of ethylene oxide groups is at least 35% (by weight), preferably at least 45% (by weight), based on all alkoxide groups in the molecule . Compounds from the group of water-soluble polyether polycarbonates, as described, for example, in EP-0-743 992 B1, are also suitable lubricants of type (A).

Lubricants (A) which are more than one of those described above are particularly preferred Implementation products included. So it is particularly advantageous if in the preparation as Lubricant component (A) 40 to 80 wt .-% of a water-soluble reaction product of Molecular weight range from 750 to 3000 are included, 5 to 20 wt .-% of a water-soluble Reaction product with molecular weights of <3000 to 20,000 and a maximum of 5% by weight of one water-soluble reaction product with molecular weights of <20,000 to 50,000. The Weight specifications refer to the lubricant (A).

The preparations of the method according to the invention contain the water-insoluble liquid (B) preferably in amounts of 0.2 to 15% by weight, preferably of 0.5 to 10% by weight, based on the entire preparation. The lubricant (A) can make up to 99% by weight of the preparation, however, it is usually in amounts of 30 to 90% by weight and in particular 35 to 60% by weight contain. In addition to components (A) and (B), the preparations also contain other, optional Components, in particular wetting agents and / or emulsifiers. The wetting agents are usually in Amounts of 3 to 20 wt .-% and the emulsifiers in amounts of 5 to 30 wt .-% in the Preparations included.

All emulsifiers which are either anionic, cationic or nonionic come as emulsifiers can question. The emulsifiers are preferably those which are used at the temperatures in High temperature texturing heaters are common (i.e. 300 ° C to 550 ° C) with no inorganic residues leave. Emulsifiers are particularly suitable, which are used in classic ashing (at 900 ° C) Ceramics or platinum crucibles can be decomposed almost completely (below 0.2% ash). Non-ionic Emulsifiers are therefore particularly suitable. There are, for example, fatty alcohol alkoxylates Molecular weights up to 800, alkoxylated fatty acids, glycols or fatty amines and alkoxylated Suitable fatty amines.  

As far as the wetting agents are concerned, all suitable ones known to those skilled in the art for spin finishes are suitable Connections can be used. We prefer water-dispersible ones in particular water-soluble substances selected. In addition to these aids, other common ones can also be used Additives may be contained in the preparations, in particular antistatic agents, thread closing agents, pH Regulators, bactericides and / or corrosion inhibitors. These additives can, if necessary, in usual amounts can be contained in the preparations. As a rule, the amount of additives is up to 15% by weight in total, but the proportion is preferably 1 to 10% by weight.

In the process according to the invention, the preparations are preferably in the form of an aqueous Emulsion containing 1 to 20 wt .-%, preferably 5 to 12 wt .-% of the preparation used. This Emulsion is made in the usual way, i.e. by means of godets (so-called lick rolls) or metering pump and Application pens applied to the yarns, which are then used in a texturing process in machines shortly be subjected to high temperature heaters. These are texturing processes according to the false wire principle, which can optionally be carried out together with an extension. The claimed method is particularly suitable for such false-wire texturing units that work with almost contactless short high temperature heaters. The temperature in High temperature heater is at least in one zone 300 ° C or more. The heaters of this machine are therefore usually only a maximum of one meter long. Suitable machines of this type will be for example from the companies ICBT (e.g. lOBT FTF15 E2 HT), Teijin Seiki (Teijin Seiki HTS 1500 or HTS 15 V), Barmag (e.g. Barmag AFK) or RPR (e.g. RPR 3 SDS). High-speed processes within the meaning of the present application are preferably those which with a yarn speed of more than 600 m / min, preferably of more than 800 m / min and especially work with a yarn speed of 900 to 1500 m / min.

The method according to the invention makes the preparations in quantities between 0.25 and 0.45 % By weight, based on the weight of the yarn, applied to the yarn. The preparations are on known way prepared by the specified ingredients in the specified amounts at temperatures between 18 and 35 ° C mixed in any order and in any be homogenized in a known manner.

In the method according to the invention, yarns made of synthetic filaments such as polyester or Textured polyamide. These are preferably POY polyester yarns.  

In a further embodiment, the present invention relates to the use of agents containing at least one water-soluble lubricant (A) and one water-insoluble liquid (B) with a viscosity of 2 to 50 mPas measured at 20 ° C according to DIN 53015, and optionally Emulsifiers and / or wetting agents and other auxiliaries as a preparation for the false wire texturing of Yarns made of synthetic filaments on texturing machines with short high-temperature heaters. The Agent is preferably in the form of an aqueous emulsion containing 1 to 20 wt .-% of the agent based on the aqueous emulsion used.  

Examples

In order to demonstrate the advantageous effect of the method according to the invention, the following preparations were examined: The experimental preparations consisted of a package 1 and a package 2. The package 1 was kept unchanged and consisted of the combination of a wetting agent (C _12-14 fatty alcohol ethoxylate with 6 moles of ethylene oxide per mole of fatty alcohol), a high-pressure lubricant (a water-soluble ethylene oxide / propylene oxide adduct with a molecular weight in the range from 5000 and 20,000 based on pentaerythritol), a water-soluble methyl-locked polyethylene glycol pelargonate and a C _16-18 fatty alcohol-started block ethylene oxide / propylene oxide emulsifier (5 mol Ethylene oxide (EO), 9 moles of propylene oxide (PO) per mole of fatty alcohol). Package 1 was 47% of the total preparation. Package 2, which represented 53% of the total preparation, consisted of four components:

• A) - Water-soluble butanol-started EO / PO adduct with MG approx. 1000
• B) - Water-soluble butanol-started EO / PO adduct with MW about 1700
• C) - Water-soluble tetrol-started EO / PO = adduct with MG approx. 7000
• D) - 2-ethylhexyl stearate, viscosity at 20 ° C: 15 to 17 mPas.

Component (IV) represents the water-insoluble component (B) according to the invention Preparation. In Table 1 are the compositions of the preparations examined listed. A combination of package 1 with lubricants (I) and (III) was used as a reference. examined.

Table 1

(Figures in% by weight)

All of the preparations listed above were spun onto a typical PES-POY yarn applied. The circulation was 0.3%. The main spinning parameters and POY yarn data were as follows:

Spinning and POY yarn parameters 1

Spinning speed: 3500 m / min
Yarn type: 256 dtex, 36 filaments
Strength: approx.23.5 cN / tex
Elongation: approx. 103%
Preparation: Barmag gear pumps and ceramic applicator
Emulsion concentration: 10%
Preparation pad: 0.30%

After storage for at least 24 hours, all the yarns were successively placed on the same 8 Positions of an RPR 3 SDS HTSH machine with stretch texturing. The texturing parameters were as follows set:

Texturing parameters 1

Machine type: RPR 3SDS
Friction unit: Temco FTS 521 M
Unit configuration: 1-6-1, Temco 630F 9 mm polyurethane working discs
Voltage limit for error message: +/- 2 cN
Winding speed: 1000 m / min
D / Y ratio: 1.80
Stretch ratio: 1.61
Heater temperature: 500 ° C - first zone
500 ° C - second zone
Fuser heater temperature Turned off

The following measured values were determined during texturing (Table 2):  

Table 2

As can be seen in the table of results, the process and yarn data are at a very good level in particular, the number of tension overshoots that are responsible for yarn breaks, significantly reduced compared to conventional preparations.

To the general validity that the addition of a water-insoluble liquid (B) too Texturing preparations significantly reduce the frequency of yarn tension peaks, to verify the following four preparations were tested on another PES-POY spinning system: reference, 13, 3 and 9.

Spinning and POY yarn parameters 2

Spinning speed: 3300 m / min
Yarn type: 167 dtex 30 filaments
Preparation: Barmag gear pumps and ceramic applicator
Emulsion concentration: 10%
Preparation pad: 0.30%

Texturing parameters 2

Machine type: Barmag FK6 V80 with high temperature heaters
Friction unit: Temco Type 8
Unit configuration: 1-6-1, Hokushin 9 mm polyurethane working discs
Voltage limit for error message: +/- 3 cN
Winding speed: 900 m / min
D / Y ratio: 1.8
Stretch ratio: 1.76
Heater temperature: 380 ° C - first zone
400 ° C - second zone
Fuser heater temperature Turned off

Results

In this case too, the advantageous effect of the method according to the invention is evident in that leads to a significant reduction in voltage peaks during the texturing process.  

Experiments were carried out with a further water-insoluble, low-viscosity component (B). Preparation 9 was chosen as the basic recipe (data in% by weight):

All four preparations were made on a POY spinning system with the spinning and POY yarn parameters 2 applied. The yarns were then run on an RPR 3 SDS high temperature heater textured:

Texturing parameters 3

Machine type: RPR 3SDS
Friction unit: Temco FTS 521 M
Unit configuration: 1-6-1, Temco 630F 9 mm polyurethane working discs
Voltage limit for error message: +/- 3 cN
Winding speed: 1000 m / min
D / Y ratio: 1.76
Heater temperature: 500 ° C - first zone
500 ° C - second zone
Fuser heater temperature Turned off

Results

It turns out that a reduction in the viscosity of component (B) also the number of Exceeding the tension limit and thus reducing the risk of yarn breakage.

Claims (16)

1. A method for texturing yarns from synthetic filaments, characterized in that a measurement containing at least one water-soluble lubricant (A) and a water-insoluble liquid (B) with a viscosity of 2 to 50 mPas at 20 ° C after measured on the yarns DIN 53015, and optionally emulsifiers and / or wetting agents and other auxiliaries, is applied in the form of an aqueous emulsion and the filaments are then subjected to texturing according to the false wire principle on a machine with a short high-temperature heater. 2. The method according to claim 1, characterized in that the preparation is water-insoluble Liquid (B) with a viscosity of 2 to 30 mPas, preferably of 5 to 25 mPas and contains in particular from 5 to 10 mPas, each measured at 20 ° C. according to DIN 53015. 3. The method according to any one of claims 1 or 2, characterized in that the preparation contains a water-insoluble liquid (B) which is selected from water-insoluble esters of fatty alcohols with 6 to 24 C atoms and / or polyols with 2 to 6 C- Atoms and 2 to 6 hydroxyl groups with linear or branched, saturated or unsaturated fatty acids C _6-22 . 4. The method according to any one of claims 1 to 3, characterized in that the preparation contains a liquid (B) which is selected from the water-insoluble fatty acid esters from C ₁₆ to C ₁₈ fatty acids with 2-ethylhexyl alcohol. 5. The method according to any one of claims 1 to 4, characterized in that the preparation contains a liquid (B) which is selected from the group of water-insoluble compounds of the general formula (I)
R ¹ -COO- (C _n H _2n O) _m -R ² (I)
where R ^{1 is} a linear or branched, saturated or unsaturated alkyl radical of chain length C ₇ to C ₂₁ , R ^{2 is} a linear or branched, saturated or unsaturated alkyl radical of chain length C ¹ to C ¹² and n is the number 2 or 3 and m stands for a number from 1 and 10, preferably from 1 to 6. 6. The method according to any one of claims 1 to 5, characterized in that the preparation is a Contains liquid (B), which is selected from the group of water-insoluble dialkyl ethers, Dialkyl carbonates, dicarboxylic acid esters, diesters of thiodipropionic acid, polyalphaolefins or of Mineral oil. 7. The method according to claim 1 to 6, characterized in that the preparation contains at least one lubricant (A) that is selected from the group of water-soluble reaction products of fatty alcohols of chain length C ₄ to C ₂₂ or of polyols with 2 to 6 hydroxyl groups and 2 to 6 carbon atoms with ethylene and / or propylene oxide, the reaction products having a molecular weight of 750 to 50,000. 8. The method according to any one of claims 1 to 7, characterized in that the preparation Lubricant (A) contains from 40 to 80 wt .-% reaction products of the molecular weight 750 to 3000, from 5 to 20 wt .-% reaction products of molecular weight <3000 to 20,000 and a maximum of 5% by weight of reaction products with a molecular weight of <20,000 to 50,000 contains. 9. The method according to any one of claims 1 to 8, characterized in that the preparation water-insoluble liquid (B) in amounts of 0.2 to 15% by weight, preferably 0.5 to 10 Wt .-%, based on the preparation contains. 10. The method according to any one of claims 1 to 9, characterized in that the preparation in addition the components (A) and (B) emulsifiers in amounts of 5 to 30 wt .-%, and / or Contains wetting agents in amounts of 3 to 20% by weight, each based on the preparation. 11. The method according to any one of claims 1 to 10, characterized in that the preparation in Form of an aqueous emulsion which contains 1 to 20% by weight, preferably 5 to 12% by weight, of the preparation, based on the aqueous emulsion, is used. 12. The method according to any one of claims 1 to 11, characterized in that the preparation contains further conventional additives, such as antistatic agents, thread-closing agents, bactericides and / or Corrosion inhibitors.   13. The method according to any one of claims 1 to 12, characterized in that yarns Polyester filaments are selected. 14. The method according to any one of claims 1 to 13, characterized in that the preparation in Amounts between 0.25 and 0.45% by weight, based on the weight of the yarn, are applied to the yarn becomes. 15. Use of an agent containing at least one water-soluble lubricant (A) and one water-insoluble liquid (B) with a (Brookfield) viscosity of 2 to 50 mPas (20 ° C), and optionally emulsifiers and / or wetting agents and other auxiliaries, as a preparation for the False wire texturing of yarns made of synthetic filaments on texturing machines with short high temperature heaters. 16. Use according to claim 15, characterized in that the agent in the form of an aqueous Emulsion containing 1 to 20 wt .-% of the agent is used.