JPH076134B2 - Oil suitable for high-speed friction false twist - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention mainly relates to an oil agent suitable for high-speed stretch friction false twist of polyester fiber, and more specifically, it is almost free from heater stains during high-speed friction false twist. The present invention relates to an oil agent for producing processed yarn, particularly an oil agent for high-speed false-twisting, which can provide a uniform knitted fabric or woven fabric which is not observed.

<Prior Art> Conventionally, as a method for obtaining a processed yarn of polyester fiber, a method of once forming an undrawn yarn after spinning into a drawn yarn and then false twisting, and performing drawing and false twisting from a spinning base yarn are performed simultaneously or continuously. There is a method, and the latter is simultaneously drawn and false-twisted mainly due to the recent technological progress. The spindle false twisting method and the friction false twisting method are adopted as such a method of imparting drawn false twist, and in particular, by adopting the friction false twisting method, the processing speed is dramatically improved to 400 to 1000 m / min. It's starting.

<Problems to be Solved by the Invention> However, as the processing speed increases, the friction between the yarn and various contact bodies (for example, guides, rollers, and heaters) increases, so that fluff is generated due to fiber damage and yarn breakage occurs. The drawback is that the value increases. On the other hand, by increasing the false twisting speed, the conventionally well known false twisting oil agent contaminates the heater significantly, and in an extreme case, tar compounds and sludge residue (hereinafter referred to as scum) are accumulated on the heater. ,
Due to this, the occurrence of fluff and breakage of the processed yarn increases. Furthermore, it causes the generation of abnormal crimps and the occurrence of dyeing spots, which causes streaks and the like on the weft steps of the nit knitted fabric and the woven fabric. Therefore, it is necessary to stop the production and frequently clean the heater, which greatly impairs the operational life.

Recently, heat-resistant oil agents have been investigated, and various oil agents mainly containing one polyether compound have been proposed.
When the polyester multi-filament yarn to which an oil agent containing such a polyether as a main component is applied is simultaneously drawn and false-twisted, good results are obtained with respect to heater stains, and an effect of preventing yarn breakage and fluff is obtained. ing. However, as the processing speed of the simultaneous drawing and false twisting process has been increased in recent years, the heater temperature has also become a high temperature of 200 ° C. or higher, and the demand for fine denier of the crimped yarn is increasing. When such a fine denier processed yarn is obtained under high-speed friction false twist, if an oil agent containing the above-mentioned polyether as a main component is used, heater stains are aggravated and the number of broken yarns increases with the operation time. The fluff of the processed yarn also increases.

Therefore, it was extremely difficult and nearly impossible to produce a fine denier yarn having a single fiber denier of 1.2 denier or less by false twisting with a high-speed friction false twist having a processing speed of 500 m / min or more.

<Means for Solving the Problems> As a result of intensive studies aimed at solving these problems, the present inventor has found that the heater has less dirt, less fuzz and less yarn breakage, and further crimping. The present invention has reached the oil agent of the present invention, which is capable of obtaining a textured yarn in which wefts having uniform properties are not generated. That is, the present invention is a fine denier processed yarn, particularly a processed yarn having a single fiber fineness of 1.2 denier or less, a processing speed of 400 m / min to 10
An object of the present invention is to provide an oil agent for high-speed friction false-twisting, which does not cause the above-mentioned various problems when performing high-speed friction false-twisting at a speed of 00 m / min.

The present invention uses an oil agent containing the following components (a) to (e) in order to prevent the above-mentioned drawbacks when performing high-speed friction false twisting.

B. Ethylene oxide (EO) and propylene oxide (PO) are added to polyhydric alcohol in block copolymerization or random copolymerization, and PO / EO (molar ratio) is 4
0/60 to 90/10, with virtually all ends having 1 carbon atom
30 to 70% by weight of a compound having an ether bond blocked by an alkyl group of ~ 12 and having a molecular weight of 1000 to 5000, and ethylene oxide (EO) and propylene oxide (PO) in a random copolymer in polyhydric alcohol. It is polymerized and has a PO / EO (molar ratio) of 20/80 to 80/20, is virtually unterminated, and has a molecular weight of 7,000 to 12
10 to 30% by weight of a compound that is 000, ethylene oxide (EO) and propylene oxide (PO) are added in a random copolymer to a polyhydric alcohol, and PO / EO (molar ratio) is 20/80 to 80/20 with virtually no end caps and a molecular weight of 18000-2
2 to 10% by weight of a compound of 8000, 4 to 15% by weight of a branched fatty acid ester having a viscosity of 2 to 5 centipoise at 75 ° C, and 0.2 to 5% of a modified silicone having a viscosity of 100 centipoise or more at 30 ° C. %, 0.1 to 5% by weight of a salt of a carboxylic acid having 1 to 5 carbon atoms, the constituents I to F of the present invention, and their roles and the basis for specifying them will be described below.

First, component a has all terminal groups blocked by alkyl groups, which further improves the smoothness of the yarn, reduces fluff and broken yarn in high-speed friction false twist, and further reduces crimp abnormal products, It is possible to obtain a processed yarn with less generation of weft steps in a nit knitted fabric and streaks in a woven fabric. In addition, the heater is very clean and good. Here PO / EO (molar ratio) 40/60 ~ 90/1
The reason why it is set to 0 is to reduce the contamination of the heater. When the molecular weight of the compound (a) is less than 1000, it is preferable in terms of fluid lubricity such as friction against metal, but it is not preferable because it is poor in heat stability and rubber swelling property is deteriorated. On the contrary, if the molecular weight exceeds 5,000, friction increases, which is not suitable. The arrangement state of the EO units and PO units in the compound B may be block copolymerization or random copolymerization. Further, all terminals of the copolymer must be ether-bonded with an alkyl group, particularly an alkyl group having 1 to 12 carbon atoms, in order to reduce friction. If this is partially end-blocked or unblocked, it is not suitable because it has the drawback of high friction. Preferred specific examples of the blocked alkyl group include a methyl group, an ethyl group,
Examples thereof include propyl group and butyl group. In addition, specific examples of the polyhydric alcohol as one raw material of the compound (i) include glycerin, trimethylolpropane, pentaerythritol, sorbitol and the like. Monohydric alcohols are unsuitable for increasing friction. From the viewpoint of smoothness, the compounding amount of the compound A is preferably 30 to 70% by weight. Of course, even if one kind of compound is used alone as the compound a,
Moreover, you may use together 2 or more types of compounds.

Next, component B has a function of strengthening the oil film and protecting the yarn surface, and shows a remarkable effect in preventing fluff during high-speed friction false twisting. A major difference from the compound (a) is that the compound is not end-capped. The reason is that the compound (i) having all the ends blocked does not have sufficient fluff prevention, whereas the compound having no unblocked ends has a remarkable fluff prevention effect. And the blending amount must be 10 to 30 weight. If it exceeds 30% by weight, the static friction coefficient between fibers becomes extremely low when the polyester powder drawn filament is taken up by spinning, and the winding shape becomes defective, which may cause yarn breakage during high-speed friction false twisting. Is. In the compound (b), when the EO unit and the PO unit are added in the form of block copolymer, there is a defect of poor smoothness, and therefore, it is preferable in the state of random copolymerization. In the compound (2), the PO / EO (molar ratio) must be 20/80 to 80/20, and if it is out of this range, defective winding shape of the polyester unstretched filament and generation of fluff of processed yarn are not preferable. . Specific examples of the polyhydric alcohol which is one raw material of the compound (b) are the same as those exemplified in the above-mentioned compound (a). The compound (b) having a molecular weight in the range of 7,000 to 12000 is preferable in terms of effects, and a compound having a molecular weight of less than 7,000 has a large number of occurrences of processed yarn fluff, and more than 12,000 has a
Neither of the polyester unstretched filaments can achieve the object of the present invention in terms of defective winding shape.

Next, compound C is used to obtain a further fluff prevention effect by strengthening the oil film in high-speed friction false twist, and the compounding amount was set to 2 to 10% by weight. This is because the static friction coefficient becomes extremely low during spinning and winding, and the wound shape becomes defective, and it also causes yarn breakage during high-speed friction false twisting. The reason why the bonding state of the EO unit and the PO unit is limited to the random copolymerization is the same as in the case of the compound (2). The reason for limiting the PO / EO (molar ratio) is the same as in the case of the above-mentioned item b. The reason for not blocking the ends is also the same. Compound C having a molecular weight in the range of 18000 to 28000 is preferable in terms of effects, and compounds having a molecular weight of less than 18000 are preferable in terms of prevention of processed yarn fluff.
Those exceeding 8,000 cannot achieve the object of the present invention because of unsatisfactory winding shape of the polyester unstretched filament.
Specific examples of the polyhydric alcohol which is one raw material of the compound (c) include the same ones as those in the above (a) and (b).

Compound D is not sufficient in smoothness for yarns only with the above polyether compounds of A to C, and prevents fuzz in high-speed friction false-twisting and causes streaks in nit knitted fabric and woven fabric due to abnormal crimping. It is used because it is impossible to completely prevent. The effect of preventing the heater from becoming dirty by adding the branched fatty acid ester is very similar to that of the polyether compounds of the above (a) to (c).
Conventionally commonly used mineral oils and linear fatty acid esters cause severe heater contamination. When the viscosity of the compound D at 75 ° C. is less than 5 centipoise, the smoothness is good, but the focusing property at high temperature is poor. On the other hand,
When the viscosity exceeds 5 centipoise, it is not preferable because it causes heater stains. This branched fatty acid ester is
In general, a synthetic ester consisting of a branched chain alcohol having 12 to 18 carbon atoms and a lower carboxylic acid having 1 to 8 carbon, which is obtained by the oxo method, is represented. Preferred examples of the branched fatty acid ester of the present invention include isostearyl adipate, isostearyl hexanate, isostearyl octanate, isohexadecyl octanate, and the like. From the viewpoint of smoothness, the compounding amount of the compound D is preferably 5 to 30% by weight.

The following compound (e) is added to improve the heater stain prevention during high-speed friction false twisting significantly, because the heater stain prevention is not sufficient only with the above-mentioned polyether compounds (a) to (c) and the above-mentioned compound (d). It is a thing. Its viscosity
If it is less than 100 centipoise at 30 ° C, scattering on the heater is large and the effect of preventing heater stains is insufficient. Preferred examples of the modified silicone include polyglycol-modified silicone, higher alcohol-modified silicone, fatty acid-modified silicone, polyethylene-modified silicone and polyether-modified silicone. From the standpoint of preventing heater fouling, the compounding amount of the compound (e) is preferably 0.2 to 5% by weight based on the whole oil agent.

And the last compound has the effect of preventing the accumulation of scum on the heater. Examples of the carboxylic acid salt having 1 to 5 carbon atoms include monocarboxylic acids having 1 to 5 carbon atoms represented by the general formula R-COOM (M: alkali metal, ammonium group, R: H, alkyl group, alkenyl group, etc.). Acid salt and general formula
MOOC-R-COOM (M: alkali metal, ammonium group, R:
Examples thereof include a salt of a dicarboxylic acid having 2 to 5 carbon atoms represented by an alkylene group, an alkenylene group, etc.). Specific examples thereof include potassium malonate, potassium maleate, potassium succinate, potassium glutarate, potassium lactate and the like. The content of the compound in the total oil agent is preferably 0.1 to 5% by weight from the viewpoint of preventing heater fouling.

The present invention provides an oil agent composed of the compounds a to f to a polyester-based undrawn yarn in an amount of about 0.3 to 0.8% to reduce the occurrence of fluff and yarn breakage due to high-speed friction false twist, and to provide crimp abnormalities. It is possible to obtain an evenly textured yarn that does not have a weft step of a knitted fabric or a streak of a woven fabric.

It should be noted that the oil agent of the present invention may be blended with an alkyl sulfonate salt or an alkyl phosphate salt which are generally known for the prevention of static electricity. Further, in order to obtain a new effect, other oil agent units, modifiers and the like may be added to the oil agent of the present invention.

The above-mentioned oil agent of the present invention has some effect even if it is used for purposes other than the present invention, for example, as a spindle type false twisted raw yarn treating agent or a synthetic yarn spinning or drawing raw yarn treating agent.

The present invention will be described below with reference to examples and comparative examples.

Examples 1 to 4 and Comparative Examples 1 to 4 Polyethylene terephthalate was spun at a spinning speed of 3500 m / min by a conventional method, and at that time, eight kinds of oil agent compositions A to H shown in Table 1 were respectively spun into the spinning base yarns. On the other hand, the amount of oil adhered is 0.
It was added so as to be 45% by weight. Using a friction false twisting machine equipped with a urethane rubber disc, draw each of the obtained spinning yarns (116 denier / 72 filament) with a draw ratio of 1.6 times, a heater temperature of 210 ° C, and a drawing speed of 600 m / min while rubbing. False twisting was performed. Each spinning raw yarn is continuously operated for 20 days to check the stretch false twisting property (fluff, yarn breakage, heater stain, crimping property, etc.), and the obtained false twisted yarn is dyed as a knitted fabric. Then, the situation of the latitudinal occurrence was investigated. The results are shown in Table 1. Of the oil agents A to H shown in Table 1, A to D are representative oil agents of the present invention, and E to H are oil agents of comparative examples.

The results of these experimental examples will be considered below.

(1) Oil agents A, B, C, and D are oil agents of the present invention, and the occurrence of false twisting yarn fluff and false twisting breakage yarn is small, there is almost no heater stain, and when crimped and knitted Good results were obtained without any reason.

(2) Oil agent E is mainly composed of polyether with all ends blocked, but has a molecular weight of 7,000 to 12000 and 18,000 to 2800.
Since 0 is not used, many processed yarn fluffs occur. In addition, it does not use the salt of modified silicon and carboxylic acid, but instead uses a generally known alkyl sulfonate, and as a result, there are few yarn breaks at the beginning of false twist, and wefts are not observed. However, as the number of false twist days increased, the number of heater scums and oil drops increased, the crimpability also varied, and the wefts of the knitted fabric and streaks of the knitted fabric occurred.

(3) As the oil agent F, one having a molecular weight of 18,000 to 28,000 was never used. In this case, the processed yarn fluff was reduced as compared with the E oil agent, but it was still generated.

(4) Oil agent G was a case where the compounds corresponding to a and d were not blended, but in this case, false twisting fluff was generated and false twisting yarn was increased due to lack of smoothness. On the other hand, crimp defects, weft steps of the knitted fabric, and streaks of the knitted fabric occurred.

(5) Oil agent H is a case where a part of the compound of (a) is replaced with a low molecular weight polyether. In this case, heater stains occur in a short time, and false twisted yarn fluff and false twisted yarn are generated. It increased rapidly with the heater dirt. At the beginning of the false twist, the crimpability and the weft pattern of the knitted fabric were good, but the crimpability deteriorated with the occurrence of soiling of the heater, and the weft pattern of the knitted fabric and the streaks of the woven fabric were generated. Also, the rubber swelling property was poor.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location D06M 15/643 D06M 13/16 13/20

Claims (1)

[Claims] 1. The following constituents (a) to (f) and constituent ratios (a) Ethylene oxide (EO) and propylene oxide (PO) are added to a polyhydric alcohol in a block copolymerization or in a random copolymerization. EO (molar ratio) is 4
0/60 to 90/10, with virtually all ends having 1 carbon atom
30 to 70% by weight of a compound having an ether bond blocked by an alkyl group of ~ 12 and having a molecular weight of 1000 to 5000, and ethylene oxide (EO) and propylene oxide (PO) in a random copolymer in polyhydric alcohol. It is polymerized and has a PO / EO (molar ratio) of 20/80 to 80/20, is virtually unterminated, and has a molecular weight of 7,000 to 12
10 to 30% by weight of a compound that is 000, ethylene oxide (EO) and propylene oxide (PO) are added in a random copolymer to a polyhydric alcohol, and PO / EO (molar ratio) is 20/80 to 80/20 with virtually no end caps and a molecular weight of 18000-2
2 to 10% by weight of a compound of 8000, 4 to 15% by weight of a branched fatty acid ester having a viscosity of 2 to 5 centipoise at 75 ° C, and 0.2 to 5% of a modified silicone having a viscosity of 100 centipoise or more at 30 ° C. %, 0.1 to 5% by weight of a salt of a carboxylic acid having 1 to 5 carbon atoms, and an oil agent suitable for high-speed friction false twisting.