JPH0291273A - Lubricant suitable for high-speed frictional false-twisting - Google Patents

Abstract

PURPOSE:To obtain a lubricant for high-speed frictional false-twisting by compounding a specific random or block copolymer of EO and PO to a polyhydric alcohol, a specific EO.PO random copolymer of polytetramethylene glycol and a specific EO.PO block copolymer of a polyhydric alcohol at specific wt.%. CONSTITUTION:The objective lubricant is produced by mixing (A) 30-70wt.% of a compound having a molecular weight of 1,000-5,000, a PO/EO molar ratio of 40/60-90/10 and all terminals blocked with ether bond using a 1-12C alkyl group and produced by adding ethylene oxide(EO) and propylene oxide(PO) to a polyhydric alcohol in a state of block copolymer or random copolymer, (B) 20-60wt.% of a compound having a molecular weight of 2,500-5,000 and a PO/EO molar ratio of 20/80-80/20 and produced by adding EO and PO to polytetramethylene glycol in a state of random copolymer and (C) 20-10wt.% of a compound having a molecular weight of 18,000-28,000 and a PO/EO molar ratio of 20/80-80/20, containing terminals in unblocked state and produced by adding EO and PO to a polyhydric alcohol in a state of random copolymer.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention mainly relates to an oil agent suitable for high-speed drawing friction false-twisting of polyester fibers, and more specifically, it relates to an oil agent suitable for high-speed friction false-twisting of polyester fibers. The present invention relates to a lubricant for producing processed yarn, in particular a lubricant for crystal speed stretching and false twisting, which can produce knitted fabrics and knitted fabrics with excellent uniformity without being observed.

<Prior art> Conventionally, methods for obtaining processed yarns of polyester fibers include a method in which an undrawn yarn after spinning is discharged as a drawn yarn and then false-twisted, and a method in which drawing and false-twisting are performed simultaneously or continuously from a spun raw yarn. However, due to recent advances in technology, the latter, simultaneous stretching and false twisting, has become the main method. -The JX false-twisting method has been adopted, and the processing speed is increasing dramatically to 400 to 1000 m/min, especially by adopting the frictional false-twisting method. As speed increases, the thread and various contact objects (
For example, the disadvantage is that increased friction with guides, roller heaters) increases the occurrence of fuzz and yarn breakage due to damage to the fibers.

On the other hand, due to the increased false-twisting speed, conventionally well-known false-twisting oils can cause significant contamination of the heater, and in extreme cases can lead to the accumulation of tar and sludge residue (hereinafter referred to as scum) on the heater. This increases the occurrence of fuzz and yarn breakage in the processed yarn. Furthermore,
It causes abnormal crimping and uneven dyeing, and causes lines in knitted fabrics and sieves in woven fabrics. Therefore, production must be stopped and heaters must be cleaned frequently, which greatly impairs operability.

Recently, heat-resistant oils have been studied, and various oils based on polyether compounds have been proposed.

Then, an oil agent containing such polyether as a main component is applied, and the polyester multifilament yarn is stretched simultaneously [-
When carried out, good results were obtained for heater stains fL, and effects were obtained for preventing yarn breakage and fuzz. However, in recent years, as the processing speed of simultaneous drawing and false twisting has increased, the heater temperature has also increased to a high temperature of 200° C. or more, and there is a growing demand for finer denier crimped yarns. When obtaining such +iF1 denier textured yarn under high-speed friction false twisting, if the above-mentioned oil agent mainly composed of polyether is used, heater contamination will worsen, yarn breakage will increase over time, and yarn breakage will increase over time. The fluff of the processed yarn that has been twisted also increases.

For this purpose, single JI1. The fiber denier is 1.2 denier Ll.

It has been extremely difficult and nearly impossible to produce the fine denier yarn shown below by false twisting at high speed friction false twisting at a processing speed of 1,000 minutes or more.

<Means for Solving the Problems> As a result of intensive research aimed at solving these problems, the inventor of the present invention has found that there is less heater dirt, less fuzzing, less occurrence of yarn breakage, and even less crimping. The oil agent of the present invention has been achieved which allows processed yarns with uniform properties and no streaks to be produced. That is, the present invention processes fine denier processed yarn, particularly processed yarn with a single fiber fineness of 1.2 denier or less, at a processing speed of 400 m.
The present invention provides an oil agent for high-speed friction false-twisting that does not cause the various disadvantages mentioned above when performing high-speed friction false-twisting at speeds of 1000 m/min to 1000 m/min.

In the present invention, in order to prevent the above-mentioned drawbacks when performing high-speed friction false twisting, an oil agent containing the following components (1) to (1) is used.

■Ethylene oxide (aO) and propylene oxide (PO) are copolymerized into polyhydric alcohol! 9 is added in a random copolymerized manner, the PO/EO (molar ratio) is 40/60 to 90/10, and substantially all terminals are blocked by ether bonds with alkyl groups having 1 to 12 carbon atoms. and has a molecular weight of 1000 to 5000
30 to 70 weights of a compound (polytetramethylene glycol to ethylene oxy)
"(EO) Tobropyre/oxide (PO) is added in a random copolymerized manner, the PO/EO (mole ratio) is 20/80 to 80/20, and the molecular weight is 250.
Ethylene oxide (EO) and propylene oxide (PO) are added to the polyhydric alcohol in a random copolymerized manner, and the PO/EO (molar ratio) is 20 to 60 times the compound with a molecular weight of 0 to 10,000. /80~80/
Compounds t-2 to 20, which are not substantially end-blocked and have a molecular weight of 1sooo to 28,000
10 times 1 inch, the following are the constituent components of the present invention:
I will explain its role and the basis for specifying it. First, all terminal groups of the component are blocked by alkyl groups, which improves the smoothness of the yarn and prevents fuzz and breakage during high-speed friction false twisting. It is possible to reduce the number of yarns, reduce the number of abnormal crimps, and obtain a processed yarn with fewer lines in knitted fabrics and lines in woven fabrics. Also, there is very little dirt on the heater, which is good. Here, PO/EO (molar ratio) is 40/
The reason for setting the ratio to 60 to 90/10 is to reduce contamination of the heater. If the molecular weight of the compound (1) is less than 1,000, it is preferable in terms of fluid lubricity such as friction against metals, but it is not preferable because it has poor thermal stability and deteriorates rubber swelling properties. On the other hand, if the molecular weight exceeds 5000, friction will increase, which is unsuitable. Such compounds Q)
The arrangement state of the EO units and PO units in may be a block copolymer or a random copolymer. All terminals of the copolymer must be ether bonded by alkyl groups, particularly alkyl groups having 1 to 12 carbon atoms, in order to reduce friction. It is not suitable if the ends are partially closed or unblocked, as they have the drawback of high friction. Preferred specific examples of the blocking alkyl group include methyl group, ethyl group, propyl group, butyl group, and the like. Further, specific examples of the polyhydric alcohol which is a raw material for compound (1) include glycerin, tetramethylene glycol, pentaerythritol, and sorbitol. -hydric alcohols are unsuitable in terms of smoothness. The amount of compound (1) to be blended is preferably 30 to 70 weights in terms of heater stains. Of course, as compound (2), one type of compound may be used alone, or two or more types of compounds may be used in combination.

Next, the component (→ has the function of completely strengthening the oil film and protecting the yarn surface, and shows a remarkable effect in preventing fuzz during high-speed friction false twisting. Its blending amount is 20 to 600 to 60% by weight. However, if it exceeds 60% by weight, the coefficient of static friction between the fibers becomes extremely low when undrawn polyester filaments are spun, resulting in poor rod shape and causing yarn breakage during high-speed friction false twisting. More preferably, the amount added is smaller than the amount of the compound (①) added. n
If it is added as a block copolymer, the smoothness will be poor. Also, PO/go (molar ratio) must be between 20/80 and 80/20,
If it is out of this range, it is not preferable because processed yarn fuzz will increase. Polytetramethylene glycol, which is the main ingredient of this compound, preferably has a molecular weight in the range of 500 to 300Q from the viewpoint of balance with P O/E O and smoothness.

In addition, compounds (→) with a molecular weight in the range of 2,500 to 10,000 are preferable in terms of effectiveness, those with a molecular weight of less than 2,500 are preferable in terms of the generation of processed yarn fuzz, and those with a molecular weight of 4 over 10,000 are preferable for undrawn polyester filaments. Both of them are not suitable for the present invention because of their poor rod shape.

Next, Compound 0 is used to ensure that -1110 fluff is prevented by strengthening the oil film during high-speed friction false twisting, and its blending amount is 2 to 10% by weight (7).
This is because when pt-hi is blended, the static friction coefficient becomes extremely low when spinning and winding polyester undrawn filaments, resulting in poor rod shape, and also causes yarn breakage during high-speed friction false twisting. . The bonding state of the EO unit and PO unit is limited to random copolymerization for the same reasons as in the case of the @ compound. The reason for limiting the PO/EO (molar ratio) is the same as in the case of (Φ) above. It is essential that the terminals are substantially unblocked, but if a large number of terminals are blocked, A sufficient anti-fuzz effect cannot be obtained. The molecular weight of compound (1) is preferably in the range of 18,000 to 28,000 from the viewpoint of effectiveness. If it is less than 18,000, it may cause fuzz in the processed yarn, and if it exceeds 28,000, it may be used for polyester filament. In both cases, the object of the present invention cannot be achieved due to the poor shape of the rod.

Specific examples of the polyhydric alcohol that is a raw material for compound (1) include the same ones as in the case of (2) above.

In the present invention, by applying approximately 0.3 to 0.8 degrees of an oil agent consisting of such compounds (1 to 0) to undrawn yarn, high-speed frictional false twisting reduces the occurrence of fuzz and set folded yarn, resulting in abnormal crimping. It is possible to obtain a uniformly processed yarn without any creases in knitted fabrics or streaks in woven fabrics.

In addition, the oil agent of the present invention may be blended with an alkyl sulfonate salt or an alkyl phosphate salt, which are generally known next to antistatic agents. Further, in order to obtain further effects such as Ifr, other oil units, modifiers, etc. may be added to the oil agent of the present invention.

The present invention uses the above-mentioned compounds 1 to 0, and the above-mentioned effects can be obtained by using the compounds 1 to 0. Conventionally, various compounds have been used to prevent tar-like substances and sludge residue (called scum) from accumulating on the heater during stretching or false twisting, which causes fluff and yarn breakage. However, in the case of the oil agent of the present invention consisting of It is not necessary to add a compound.However, if necessary, such a compound may be added for the purpose of obtaining a more -1 effect or a new effect.

The above-mentioned oil agent of the present invention can be used for purposes other than the present invention, for example, as a yarn treatment agent for spindle-type false twisting) or a yarn treatment agent for spinning and drawing of synthetic fibers. .

The present invention will be fully explained below with reference to Examples and Comparative Examples.

Examples 1 to 4 and Comparative Examples 1 to 6 Polyethylene terephthalate 13200m/
At this time, 10 types of oil compositions A and J shown in Table 1 were applied to the spun yarn so that the amount of oil applied was 0.45 times. . Each of the obtained fibers was spun: yarn (116 denier/72 filaments) was drawn using a drag false twister equipped with a urethane rubber disc at a stretching ratio of 1.6 times, a heater temperature of 210°C, and a processing speed of 6001 Tl/min. Friction false twisting was performed while stretching. The spun yarn of Step 11 was continuously operated for 20 days each to examine the drawing false twisting properties (fuzz, yarn breakage, heater stains, crimpability, etc.), and the resulting false twisted yarn was used as a knitted fabric. It was dyed and finished, and the occurrence of four stages was examined. The results are shown in Table 1. Among the oils A to I shown in Table 1, A,
D is a typical oil agent of the present invention, E (1) oil agent A,
B, C, and D are oil agents of the present invention, which have little occurrence of false twist yarn fluff and false twist breakage, almost no heater stains, and good crimpability and no line film when knitted. A good result was obtained.'i''Lfc0(2) Oil agent E has all terminals blocked and is mainly composed of polyether, but the @ of the present invention
Since a compound corresponding to O is not used, a large amount of processed yarn fluff is hidden.

(8) The oil agent F does not contain the compound corresponding to (1) in the present invention, is mainly composed of terminal-unblocked polyether, and also does not contain the compound corresponding to (→).

In this first case, although the amount of fuzz on the processed yarn was reduced compared to the oil agent E, a large amount was still generated, and there were also a large number of yarn breaks and scum accumulation.

(4) Oil agent G does not contain the compound corresponding to (■), but in this case, due to insufficient smoothness, false twist fuzzing and false twist breakage were slightly more likely to occur. ) Oil agent H does not contain a compound corresponding to compound 0 of the present invention. In this case, a rather large amount of processed yarn fuzz and false-twisted broken yarn occurred. (6) This is the case where the oil processing compound was not used, and a large amount of reloye yarn fuzz occurred.

(γ) Oil agent J is a case where the compounding amount of the compound (■) is too small, and heater stains occur in a short period of time, and false-twisted yarn and processed yarn fuzz rapidly increase along with heater stains. At the beginning of false twisting, the processed yarn fuzz, the false twisted broken yarn, the crimpability, and the 4th row of the knitted fabric were good, but as the heater dirt increased, the crimpability deteriorated, and the 4th row of the knitted fabric and the 4th row of the knitted fabric were good. Streaks occurred. Furthermore, the engraving properties of Rubber 1 were poor.

Remaining days below

Claims (1)

[Scope of Claims] Constituent components and constituent ratios of the following [a] to [c] [a] Ethylene oxide (EO) and propylene oxide (PO) are block copolymerized or random copolymerized in a polyhydric alcohol It is added and PO/EO (
molar ratio) is 40/60 to 90/10, substantially all terminals are blocked by ether bonds with alkyl groups having 1 to 12 carbon atoms, and the molecular weight is 1000 to 50.
Ethylene oxide (EO) and propylene oxide (PO) are added to polytetramethylene glycol in a random copolymerized manner, and the PO/EO (molar ratio) is 20 to 70% by weight. /80 to 80/20 and has a molecular weight of 250
20 to 60% by weight of a compound having a molecular weight of 0 to 10,000; 20/80-8
0/20, the end is not substantially blocked,
and a compound having a molecular weight of 18,000 to 28,000.
~10% by weight, an oil agent suitable for high-speed friction false twisting.