JPH0284573A - Oiling agent suitable for high-speed friction false twisting - Google Patents

Abstract

PURPOSE:To obtain the subject oiling agent capable of providing textured yarns with hardly any fouling with heaters and occurrence of fluff or yarn breakage without causing weaving bars by adding a branched fatty acid ester to three specific kinds of polyether-based compounds. CONSTITUTION:An oiling agent obtained by blending (A) 30-70wt.% compound (the whole terminals are sealed with 1-12C alkyl groups through ether bonds), prepared by adding ethylene oxide and propylene oxide at (40/60)-(90/10) molar ratio to a polyhydric alcohol in the form of a block or random copolymer and having 1000-5000 molecular weight with (B) 2-10wt.% random copolymer (having 18000-28000 molecular weight) at (20/80)-(80/20) above-mentioned molar ratio, (C) 20-60wt.% random copolymer (having 2500-10000 molecular weight) at (20/80)-(80/20) afore-mentioned molar ratio and (D) 4-15wt.% branched fatty acid ester having 2-5cP viscosity at 75 deg.C.

Description

[Detailed Description of the Invention] <Industrial Field of Application> Akira Motonuma 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. The present invention relates to a lubricant for producing textured yarn, which can provide excellent uniformity of 11th order knitted fabrics and woven fabrics without any observed defects, and in particular to a lubricant for high-speed stretching and false twisting.

<Conventional technology> Conventionally, methods for obtaining processed yarns of polyester fibers include a method in which undrawn yarn after spinning is first turned into a drawn yarn and then false-twisted, and a method in which drawing and false-twisting are simultaneously or continuously performed from the spun raw yarn. However, due to recent advances in technology, the latter method of simultaneous stretching and false twisting has become the main method. The spindle false-twisting method and the Kensei false-twisting method have been adopted as methods for applying such stretch false-twisting, and in particular, by adopting the 4-flip false-twisting method, the JJ loe speed has been dramatically improved to 400 to 1000 m/min. It is being done.

<Problem to be solved by the invention> However, as the processing speed increases, the friction between the yarn and each woodcutter contact body (e.g. guide, roller heater) increases, causing damage to the fibers, causing fuzz and yarn breakage. The disadvantage is that the number of occurrences increases.

However, due to the increased false-twisting speed, conventional false-twisting oils can significantly contaminate the heater and, in extreme cases, cause tar build-up and sludge residue (hereinafter referred to as scum) to build up on the heater. However, this causes an increase in the occurrence of fuzz and yarn breakage in the processed yarn. Furthermore,
This causes abnormal crimping and dyeing spots, and streaks appear on knitted fabrics and 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 have been proposed, one of which is mainly composed of polyether compounds.

When polyester multifilament yarns coated with an oil agent containing polyether as a main component are drawn and false-twisted at the same time, good results are obtained against heater stains and effective in preventing yarn breakage and fluffing. ing. 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 an increasing demand for finer denier crimped yarns. When obtaining such fine denier textured yarn under high-speed frictional false twisting, if the above-mentioned polyether-based oil agent is used, heater fouling will worsen and yarn breakage will increase over time, making it difficult to obtain There will also be more fluff in the yarn that has been processed.

For this reason, it is extremely difficult and nearly impossible to produce fine denier yarn with a single fiber denier of 1.2 denier or less using high-speed friction false twisting at a processing speed of 500 m/min or higher. .

<Friendly Means to Solve 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 contamination, less fuzzing, less occurrence of yarn breakage, and even less crimping. As a result of the present invention, it is possible to obtain a processed yarn with uniform properties and without the formation of a line film. 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 suffer from the various disadvantages mentioned above when performing high-speed friction false-twisting at a speed 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, the following components (1) to (4) are blended and a lubricant is used.

■ Ethylene oxide (EO) and propylene oxide (PO) are added to polyhydric alcohol in a block copolymerized manner, and Maku is added in a random copolymerized manner, with a PO/EO (mole ratio) of 40/60 to 90/10. , substantially all of the terminals are blocked by ether bonds with alkyl groups having 1 to 12 carbon atoms, and the molecular weight is 1000 to 500.
30 to 70 weight tons of a compound with a polytetramethylene glycol (po/a), which is a polytetramethylene glycol in which ethylene oxide (EO) and propylene oxide (PO) are randomly copolymerized.

(molar ratio) of 20/80 to 80/20 and a molecular weight of 2,500 to 10,000.
Weight%, ■ Ethylene oxide (EO) and propylene oxide (PO) are added to polyhydric alcohol in a random copolymerized manner, and the PO/EO (molar ratio) is 20/80 to 80/
20, which is not substantially end-blocked, and has a molecular weight of 18,000 to 28,000.
0% by weight, 4 to 15% by weight of branched fatty acid ester with a viscosity of 2 to 5 centimeters/cm at 075°C. Below, the constituent components of the present invention (■ to ■), their roles, and the basis for specifying them will be explained. 0 First, component (2) has all terminal groups blocked by alkyl groups, which improves the smoothness of the yarn compared to gold, reduces fuzz and yarn breakage during high-speed friction false twisting, and also prevents abnormal crimping. It is possible to obtain a processed yarn with less generation of lines in knitted fabrics and lines in woven fabrics. The heater is in good condition with very little dirt. Here, P (J/EO (mole ratio)) gold 40
The reason for setting the ratio to be /60 to 90/10 is to reduce heater contamination. If the molecular weight of the compound (2) is less than 1000, it is preferable in terms of fluid lubricity such as friction against metal, 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 5,000, friction will increase, which is unsuitable. Such compounds■
The arrangement state of the EO units and PO units in may be block copolymerized or random copolymerized. All terminal ends 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 unsuitable if the terminal is partially blocked or unblocked, as this has 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. Specific examples of polyhydric alcohols that can be used as raw materials for compound (1) include glycerin, pentaerythritol, sorbitol, trimethylolpropane, and the like. -hydric alcohols are unsuitable due to poor lubricity. The amount of compound (1) to be blended is preferably 30 to 70% by weight in terms of preventing heater stains and smoothness.

Of course, in terms of compounds, one type of compound may be used alone, or two or more types of compounds may be used in combination.

Next, component O has the function of strengthening the oil tension and protecting the yarn surface, and exhibits a remarkable effect in preventing fuzzing during high-speed friction false twisting. The blending amount must be 20 to 60% by weight, and if it exceeds 60% by weight, it should be polyester unfilled filament. During spinning and winding, the coefficient of static friction between fibers becomes extremely low, resulting in poor winding 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) above. In the compound (2), the ethylene oxide (EO) units and the butyrene oxide (PO) units must be combined in a random copolymerization manner, and if they are added in a block copolymerization manner, the smoothness will be affected. It becomes defective. Also PO/EO (molar ratio)
must be in the range of 20/80 to 80/20, and if it is outside this range, the occurrence of D loe yarn fuzz will increase, which is not preferable. Polytetramethylene glycol, which is a raw material for this compound @, preferably has a molecular weight within the range of 500 to 3000 from the viewpoint of balance with PO/EO and smoothness.

The molecular weight of the Manen compound @ is preferably in the range of 2,500 to 10,000 from the viewpoint of effectiveness. If it is less than 2,500, it may cause fuzz in the processed yarn, and if it exceeds 10,000, it may affect the winding shape of the undrawn polyester filament. Both are unsuitable for the present invention due to their defects.

Next, compound (1) is used to further prevent fuzzing by strengthening the oil film during high-speed friction false twisting. This is because when spinning and winding the drawn filament, the coefficient of static friction becomes extremely low, resulting in a poor winding shape, and 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 a random copolymerization state is the same as in the case of the O compound. The reason for limiting PO/EO (molar ratio) is also mentioned above.
The same is true for . It is essential that the ends are substantially unblocked, but if the ends are blocked too much, a sufficient fuzz-preventing effect cannot be obtained. It is preferable that the molecule f of the compound is in the range of 18,000 to 28,000 from the viewpoint of effectiveness.If it is less than 18,000, it will cause fuzz in the processed yarn, and if it exceeds 28,000, it will cause poor polyester filament winding shape. In both cases, the purpose of the present invention cannot be achieved.

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.

Compound (■) does not provide sufficient smoothness to the yarn when using only the polyether compounds (■ to ■) above, and prevents fuzzing during high-speed friction false twisting and causes lines in knitted fabrics and streaks in woven fabrics due to abnormal crimp. It is used because it is impossible to completely prevent this. The heater stain prevention effect by adding this branched fatty acid ester is as follows
It is very good, being on the same level as polyether compounds.

Mineral oils and straight chain fatty acid esters that have been commonly used in the past cause severe heater contamination. When the viscosity of compound (1) at 75° C. is less than 2 centipoise, the smoothness is good, but the cohesiveness at high temperatures is poor. On the other hand, if the viscosity exceeds 5 centipoise, the heater will become contaminated, which is not preferable. The branched fatty acid-protecting ester is typically a synthetic ester consisting of a branched alcohol having 12 to 18 carbon atoms and a lower carboxylic acid having 1 to 8 carbon atoms, which is generally obtained by the oxo method. Preferred examples of the branched fatty acid ester of the present invention include instearyl adipate, isostearyl hexanate, isostearyl octanate, isohexadecyloctanate, and the like. The amount of compound (1) to be blended is preferably 5 to 30% by weight in terms of smoothness and heater staining.

In the present invention, by applying an oil agent consisting of such compounds (1) to (0) to undrawn yarn in a degree of variation of 0.3 to 0.8, the occurrence of fuzz and yarn breakage is reduced during high-speed friction false twisting, and abnormal crimp is prevented. It is possible to obtain a uniformly processed yarn without lines in knitted fabrics or streaks in woven fabrics.

It should be noted that the oil agent of the present invention may be blended with a commonly known alkyl sulfonate salt or alkyl phosphate salt in order to prevent static electricity. Furthermore, in order to obtain new effects, other oil units, modifiers, etc. may be added to the oil agent of the present invention.

The present invention uses the nine compounds (1) to (2) described above, and thereby the effects as described above can be obtained. Traditionally, tar-like substances and sludge residue (called scum) accumulate on the heater during stretching and false twisting, which causes fluff and yarn breakage, and various compounds are added to the oil agent to prevent this. Although it is proposed to do so, ■~■ of the present invention
In the case of an oil agent consisting of, it is sufficient to prevent the accumulation of tar-like substances and scum, and there is no need to add such compounds. However, if necessary, such compounds may be added for the purpose of obtaining further effects or new effects.

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

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

Examples 1-4 and Comparative Examples 1-6 Polyethylene terephthalate e3200m/
At this time, ten types of oil compositions A and J shown in Table 1 were applied to the spun yarn so that the amount of oil adhesion was 0.45 weight tS. The nine obtained spinning yarns (116 dennies/L//72 filaments) were drawn using a friction false twister equipped with a urethane rubber disk at a stretching ratio of 1.6 times, a heater temperature of 210°C, and a processing speed of 600 m/min. Perform friction false twisting while stretching.
Continuous operation was carried out for each spun yarn for 20 days each, and the drawing and false twisting properties (fuzz, yarn breakage, heater stains, crimpability, etc.) were examined, and the resulting f'L7 was knitted with the false twisted yarn. The specimen was dyed and finished, and the development of line membranes was examined. The results are shown in Table 1. Among the oils A and J shown in Table 1, A~
D is a typical oil agent of the present invention, and E to J are oil agents of comparative examples.

The results of these experimental examples will be discussed below.

(1) Oil agents A, B, C, and Di are oil agents of the present invention, which cause less occurrence of false twist yarn fluff and false twist breakage, almost no heater stains, and improved crimpability and knitting properties. Good results were obtained with no streaks.

(2) Oil agent E is all terminal-blocked and is mainly composed of polyether, but many fluffs are generated in the finished yarn, which does not use the compounds corresponding to @ and ○ of the present invention.

8) Oil agent F does not contain any compound corresponding to (2) in the present invention, is mainly composed of terminal-unblocked polyether, and does not contain any compound corresponding to (2) or @. In this case, although the amount of processed yarn fuzz was reduced compared to that of oil agent E, a large amount still occurred, and occurrence of yarn breakage and accumulation of scum were also very large.

(4) Oil agent G does not contain the compound corresponding to (2), but in this case, due to the lack of smoothness, the occurrence of false twist fluff and false twist breakage is slightly increased.

(5) Oil agent H does not contain a compound corresponding to the @ compound of the present invention. In this case, slightly more fuzz and false-twisted broken yarn are generated.

(γ) Oil agent J does not use the compound corresponding to O of the present invention, and the amount of compound (■) is too small, and heater stains occur in a short period of time, causing false twisting (thread breakage and processing). Please note that thread fuzz increases rapidly with heater contamination.

At the beginning of false-twisting, the processed yarn fuzz, the false-twisted broken yarn, the crimpability, and the line film of the knitted fabric were good, but as the heater dirt increased, the crimp property deteriorated, and the line film of the silk fabric and the line film of the fabric were good. A friend that happens. Furthermore, the rubber swelling property was poor.

Margin below

Claims (1)

[Scope of Claims] Constituent components and constituent ratios of the following [a] to [d] "a" polyhydric alcohol containing ethylene oxide (EO) and propylene oxide (PO) in a block copolymerization form or a random copolymerization form. 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 5000. % by weight, ethylene oxide (EO) and propylene oxide (PO) are added to polytetramethylene glycol in a random copolymerized manner, and the PO/EO (molar ratio) is 20/80 to 80/20.
and 20 to 60% by weight of a compound having a molecular weight of 2,500 to 10,000; /EO (molar ratio) is 20/80 to 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, [d] 4 to 15% by weight of a branched fatty acid ester having a viscosity of 2 to 5 centipoise at 75°C;
An oil agent suitable for high-speed friction false twisting, characterized by the following: