JPS5810512B2 - kenshiyukukakoyoumienshinshinoshiyorihouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an undrawn yarn suitable for crimping, particularly a ``stretched false twist'' process in which a crimped yarn is produced by sequentially or simultaneously stretching and false twisting. The present invention relates to a processing method that can provide undrawn yarn suitable for supply to.

More specifically, the elapsed time until the spinning winding diameter crimping process,
In particular, this is a method for processing undrawn yarn that shows little change in physical properties even when left in a high-temperature environment over time, and thus can always yield crimped yarn with uniform physical properties and the same degree of dyeing. When spinning Hoko's undrawn yarn at high speed, it is possible to reduce fluctuations in various tensions such as winding tension due to frictional fluctuations with the contact body, thereby providing crimped yarn without dyeing spots, In addition, the present invention relates to a method for processing undrawn yarn for crimping, which has good shape uniformity (referred to as winding shape) of the winding package during high-speed spinning, has good unwinding properties during crimping, and has extremely low yarn breakage problems. It is something.

Conventionally, crimped yarn has been produced through a series of processes in which undrawn yarn spun in a spinning process is stretched twice in a subsequent drawing process, and the resulting drawn yarn is processed by various crimping methods. It has been manufactured over the years.

However, recently, in order to improve production efficiency by shortening these processes, a method of manufacturing crimped yarn by sequentially or simultaneously performing drawing and false twisting has been developed, that is, ``stretched false twisting''. started to take place.

It is generally advantageous to use an undrawn yarn spun at a higher speed (1700 m/min or more) than conventionally as the undrawn yarn used in this drawn false twisting process.

This is due to the fact that productivity is improved and the undrawn yarn has excellent threading properties at the initial motion during drawing and false twisting.

However, knitted fabrics and woven fabrics made from crimped yarns obtained by drawing and false twisting such undrawn yarns often have a large number of streaks.

The present inventor conducted various analyzes on the causes of such streaks, and found that the streaks are thicker (and thicker) due to changes in physical properties that occur over time while the spun undrawn yarn is stretched and false-twisted. For undrawn yarns produced by high-speed spinning, this change in physical properties over time tends to be small, but on the other hand, various tensions such as winding tension increase, and various guides such as thread guides and traverse hooks are required during winding. When frictional fluctuations with contact objects such as the like become large and extreme, white powder from the fibers is deposited on these guides, and the accompanying increase in tension fluctuations causes the undrawn yarn to have larger stress spots. Therefore, it was found that this induced streaks in the crimped yarn produced by the subsequent drawing and false twisting process.

That is, the time for which the undrawn yarn to be supplied to the drawn and false-twisted process is left to stand after being spun before being processed is the same as in the case of obtaining crimped yarn by false-twisting the drawn yarn in the past. Due to transportation and long-term storage, it is common for products to be aged for 1 to 2 months, or even 6 months.

However, the physical structure of undrawn yarn is more unstable than that of conventional drawn yarn, and it tends to change over time after spinning, especially as the environmental temperature increases, and these changes in properties tend to It was found that this effect even affects the properties of the processed yarn obtained by subsequent drawing and false twisting.

That is, it has been found that the degree of dyeing of drawn and false-twisted yarns made from undrawn yarns that have been aged for a long time after spinning tends to be darker than those from undrawn yarns that have been aged for a shorter time.

For this reason, knitted fabrics and woven fabrics in which processed yarns with different degrees of dyeing obtained from undrawn yarns at different ages are used at the same time have many sushi-like streaks due to the difference in the degree of dyeing.

In order to eliminate these troubles, it is necessary to always use undrawn yarn of the same age during the drawing and false twisting process, or to use crimped yarn when producing knitted or woven fabrics using crimped yarn. Management considerations such as sorting undrawn yarn into lots over time are required, but such operations are extremely complicated and not only reduce production efficiency, but also reduce the distribution of complex fibers such as tweezers. It is no exaggeration to say that it is almost impossible for a mechanism to do so.

The present inventor investigated various factors that affect changes in the physical properties of undrawn yarn over time, which causes changes in the physical properties of undrawn yarn over time, especially changes in dyeing of processed yarn obtained by drawing and false twisting. It has been found that the components of the fiber treatment agent (oil agent) applied to the undrawn yarn in the process and the combination thereof have a very large influence.

Based on this knowledge, the present inventor conducted various studies on oils for textile treatment, and as a result, the inventors of the present invention have developed a method based on a specific high molecular weight polyether having a propylene oxide group and an ethylene oxide group in the molecule, and a certain type of lubricant. The present invention was achieved by discovering that the use of a processing agent suppresses changes over time.

That is, in the present invention, an undrawn synthetic fiber yarn is made of (a) a polyether which is a reaction copolymer of an alcohol having 4 or more hydroxyl groups and ethylene oxide and propylene oxide and has a molecular weight of 1,300 or more by weight of 30 to 80%; %, (b) Mineral oil with redwood viscosity 60" or more, aliphatic carboxylic acid ester of monohydric or polyhydric alcohol, aliphatic alcohol ester of aliphatic dicarboxylic acid, aliphatic alcohol ester of aromatic carboxylic acid with molecular weight 360 or higher and kinematic viscosity 10
10 centistokes or more of one or more selected from the group consisting of dimethyl silicone and modified silicone.
~50% by weight, (c) a nonionic activator that is an alkylene oxide adduct of a compound having at least one aromatic ring, an alkylene oxide adduct of a partially esterified polyhydric alcohol, or an alkylene oxide adduct of a polyhydric alcohol. The nonionic surfactant which is an aliphatic carboxylic acid ester of 10
~40% by weight, (d) 1-30% by weight of a monometallic salt of a higher alcohol or alkylphenol added with propylene oxide and ethylene oxide, and (e) 1-30% by weight of an alkylsulfonate metal salt. This is a method for treating undrawn yarn for crimping, characterized in that it is treated with a treatment agent consisting of %.

The term "synthetic fiber undrawn yarn" as used herein is a general term for all synthetic fiber undrawn yarns that can be stretched and false-twisted, but in the present invention, the change over time of the undrawn yarn is particularly important. The effect is remarkable on undrawn polyester yarn.

The polyether of component (a) in the treatment agent used in the present invention uses a tetrahydric or higher alcohol as an addition base, such as pentaerythritol, sorbitol, dipentaerthritol, and aliphatic carboxylic acid esters thereof. It is a compound having at least four or more hydroxyl groups in the molecule, and addition of ethylene oxide and propylene oxide to it is carried out in the form of random or block polymerization.

In order to achieve the object of the present invention, a small molecular weight (both 1300 or more) is required, and the polymerization ratio of ethylene oxide and propylene oxide is preferably such that the ratio of propylene oxide is large.

The effect of using the polyether in the present invention is that it has a high molecular weight and becomes a sterically bulky molecule in which ethylene oxide and propylene oxide are added to four or more hydroxyl groups, so that it can be absorbed into the interior of the undrawn yarn. It is presumed that this is to suppress changes in physical properties that would cause changes in dyeing over time since there is no diffusion and penetration.

If the molecular weight is less than 1300, this effect is not sufficient, and if the alcohol as the addition base is trivalent or less, this steric effect is small, and the undrawn yarn will not be able to stand in a high temperature environment of 40°C or more. If left untreated, sufficient effects may not be achieved due to changes in dyeing over time.

In addition, as component (b), mineral oil with a redwood viscosity of 60" or more and carboxylic acid esters of various alcohols preferably have a molecular weight of 360 or more. For example, as an aliphatic carboxylic acid ester of a monohydric alcohol, octyl stearate, isotridecyl stearate,
Examples include lauryl laurate, isocetyl stearate, instearyl palmitate, and oleyl oleate. Examples of aliphatic carboxylic acid esters of polyhydric alcohols include diethylene glycol didecanoate, neopentyl glycol dilaurate, and trimethylolproban trisocaate. Examples of alcohol esters of aliphatic dicarboxylic acids include dioctyl adipate, diisotritecyladipate, diisooctyl acelate, dioctyl sebacate, and diisocetyl sebacate; examples of aromatic carboxylic acid esters include dioctyl phthalate and Examples include octyl trimellitate and tritesyl trimellitate.

The above component (b) does not diffuse into the interior of the polymer in the undrawn yarn and does not have any effect of reducing neck strength, so it does not cause physical changes that cause dyeing changes over time. It has a suppressing effect.

It is appropriate to mix the same components (a) and (b) so that component (a) is 30 to 80% by weight in the treatment agent (non-aqueous component) and component (b) is 10 to 50% by weight. .

With such a combination, the lubricity at room temperature is better due to the combination of component (b) than in the case of component (a) alone, and wear of various guides during stretch false-twisting and the like can be reduced.

When undrawn yarn is treated with the above-mentioned treatment agent in the spinning process, it is generally used as an aqueous emulsion, and (e) a surfactant is used as an emulsifier.

In this case, in order to further enhance the effects of the present invention, a nonionic surfactant which is an alkylene oxide adduct containing at least one aromatic ring in the molecule [for example, ethylene oxide of alkylphenol] is used as a surfactant. or a low molar adduct of propylene oxide, a low molar adduct of benzylphenylphenol with ethylene oxide or propylene oxide], an alkylene oxide adduct of a partially esterified polyhydric alcohol, or an aliphatic carboxylic acid ester of an alkylene oxide adduct of a polyhydric alcohol. [e.g. ethylene oxide added sorbitan monoalkylate, ethylene oxide added sorbitan trialkylate, ethylene oxide added trimethylolpropane monoalkylate, ethylene oxide added trimethylolpropane trialkylate, ethylene oxide added pentanyl thritol sial] Chelate, or (ethylene oxide trimethylolpropane) tristearate, (
(ethylene oxide trimethylolpropane) distearate, (ethylene oxide trimethylolpropane) monostearate dipalmitate, (ethylene oxide trimethylolpropane) trilaurate, (ethylene oxide pentanyl thritol) ) dilaurate, (ethylene oxide-added glycerol) monolaurate, etc.] alone or in combination.
~40% by weight is used.

In addition, when using the processing agent in high speed spinning,
It has the advantage that there is no deterioration in the shape of the roll that occurs when treated with general polymeric polyether.

Although the reason for this is not necessarily clear, in general, the winding appearance tends to deteriorate as the filaments become more slippery due to the lubricating agent. It is presumed that this is because the friction between the filaments increases due to the steric effect based on molecular branching caused by the use of an adduct of tetrahydric or higher alcohol.

On the other hand, the present inventor discovered that at high speed spinning (1700 m/min or higher, tension such as winding tension increases, especially at 2500 m/min or higher).
As a result of extremely high friction between the yarn and various contact objects such as yarn guides, traverse hooks, etc., tension fluctuations increase and cause stress unevenness in the wound undrawn yarn. The crimped yarn obtained by twisting often appears as streaks, and it has been recognized that this tendency increases as the spinning speed increases. In order to implement it more advantageously, in order to reduce this tension fluctuation as much as possible (d)
We have found that it is desirable to include special phosphonate metal salt activators.

That is, it has been found that the presence of 1 to 30% by weight or more of a higher alcohol with propylene oxide and ethylene oxide added or a phosphonate metal salt of alkylphenol in the treatment agent improves the lubricity and exhibits an extremely desirable effect.

This effect is particularly noticeable when the treatment agent is used as an aqueous emulsion.

Further, in the present invention, it is desirable to contain an ionic activator in the treatment agent in order to suppress static electricity generated during stretching and false-twisting. 1% by weight of alkyl sulfonate Na salt or salt obtained from No. 18 olefins
It is desirable to use the above.

If such an ionic activator is used in an amount exceeding 30% by weight, there will be a problem with heat resistance, so it is desirable to use an amount less than this.

When treating undrawn yarn with a treatment agent containing each of the above-mentioned components, the treatment agent is used as an aqueous emulsion, and the undrawn yarn after spinning and before winding is treated with an oiling roller, spray, or other means. It is appropriate to apply the agent uniformly.

Generally, it is desirable to adjust the amount of the treatment agent attached to the undrawn yarn so that the weight of the treatment agent (non-aqueous component) per fiber weight is 0.2 to 1.0% by weight.

According to the present invention as described above, the change over time of undrawn yarn is significantly reduced, and even when aged under high temperature environmental conditions exceeding 40°C, it is possible to semi-permanently impart a degree of dyeing. As a result, crimped yarns and knitted fabrics with small streaks can be obtained.

In addition, fluctuations in various tensions during the spinning process are reduced, and the winding appearance of the winding package is improved, resulting in greatly improved properties (particularly streaks) of the final crimped yarn, resulting in an excellent finished yarn. can be obtained.

The present invention is most effectively adopted when performing a drawn false twisting process using undrawn yarn spun at high speed. The method of obtaining crimped yarn also has excellent heat resistance properties and can be employed as a sufficiently advantageous processing method.

Next, a specific explanation will be given with reference to examples.

Note that % in the examples represents weight % unless otherwise specified.

Example 1 After cooling the yarn obtained by spinning molten polyethylene terephthalate from a spinneret, it was treated with a 15% aqueous emulsion of oil agent A using an oiling roller, and then at a circumferential speed of 1
An undrawn polyester system A with a total tenier of 350 denier and a number of single yarns of 30 was obtained by winding through a take-up roller rotating at 800 m/min. 6 In the same manner, threads B to G were obtained by treating with oil agents B to G. Ta.

These undrawn yarns A-G were aged within 1 day after spinning, and the stretching ratio was 2.4 times and the heater temperature was 19.
5℃, spinner rotation speed 320,000 rpm, number of twists 2550
A crimped yarn was obtained by simultaneously carrying out stretching and false twisting under the conditions of 1/m.

In addition, the undrawn yarns A-G were heated at a temperature of 40 to 45°C and a relative temperature of 45°C.
After being left in a room at ~90% RH for one month, the yarn was drawn and false-twisted simultaneously under the same conditions to obtain a crimped yarn.

Next, the crimped yarn obtained from the undrawn yarn aged within 1 day and the undrawn yarn aged 1 day was made into a circular knitted knitted yarn having a width of 10 cm, and this was dyed in the same dyeing bath under the conditions described below. Ta.

Table 1 shows the changes in the beam floor and degree of dyeing.

Dyeing conditions Dye Eastman Polyester Blue LS Bath concentration 2% aqueous solution Bath ratio 1:100 Immerse in the above 70°C dye bath in a high-pressure winch, heat up to 100°C for 20 minutes, and continue dyeing for 90 minutes.
Next, washing was carried out at 40°C in a 187/l monogen bath, and then thoroughly washed with water.

Oil composition content P, 0 is propylene oxide group, E, O is ethylene oxide group, P, 0/E, 0 is their copolymerization molar ratio,
() represents weight ratio.

Oil agent A (example of the present invention) Pentanylthritol P, 0/E, 0 (80/20) random adduct 50% (molecular weight 1
500) Isotridecyl stearate 30E・0 (2 mol) added nonylphenol 3-l E・0 (5 mol) added nonylphenol 7-l P, 0 (2 mol) E, O (4 mol) added 5-added lauryl phos Hate salt alkyl sulfonate Na 5 oil agent B
(Example of the present invention) Sorbitol P, 0/E, 0 (60/40) random adduct 55% (molecular weight 5
000) Mineral oil 120 seconds 25E, 0 (2 mol) addition nonylphenol 11-l P, 0 (2 mol) / E, 0 (6 mol) 6-addition lauryl phos-) K salt to alkyl sulfonate salt 3 Oil agent C (Example of the present invention) Dipentaerthritol P, 0/E, 0 (75/25) random addition 60% product (molecular weight 6000) Trimethylolpropane trideca 20 Noate E, O (7 mol) Benzyl phenyl 12 Phenol P , 0 (3 mol)/E, 0 (2 mol) Salt added to isocetyl phosphate 3 Alkyl sulfone) Na salt 5 Oil agent D (example of the present invention) Pentanylthritol P, O/E, 0 (85 /15) Block adduct 40% (molecular weight 5
000) Pentanylthritol P, O/E, 0 (75/25) block adduct 20 (molecular weight 20
00) Dioctyl sebacate 20E, 0 (10
mol) Penzylphenylated 5-ruphenol (E, 0 (24 mol) addition trimethylolpropane) distearate P, 0 (5 mol) / E, O (4 mol) 8-addition lauryl phosphate Na salt alkyl sulfone) Km 2 oil agent E (
Comparative example) Butanol P, 0/E, 0 (501 50) random adduct (molecular weight 80% 1500) E, O (6 mol) addition lauryl 12% Cole E, 0 (10 mol) addition nonyl phenylene 5Nol E, O (3 mol) added lauryl salt 3 phosphate salt oil agent F (comparative example) Trimethylolpropane P, O/E, 0 (60/40) random addition 75% (molecular weight 1300) E, O (8 mol) added oleyl alkaline 1゜Col E, 0 (20 mol) addition castor oil 5 dioctyl sulfosuccinate 1゜Na salt oil agent G (comparative example) Butanol P, 0/E, 0 (501 50) random adduct (molecular weight 20% 1000) In Butyl stearate 50E, 0 (8 mol) addition oleyl alcohol 1° Col E, 0 (10 mol) addition laurate 10E, 0 (5 mol)
Mol) Addition sorbitant 5 lyolate E, 0 (5 mol) Addition lauryl fluoride Salt to 5 sthate Explanation of evaluation items *1 Dyeing stockinette knit from undrawn yarn 1 month after dyeing spun to dyed stockinette knit from stretched false-twisted yarn Each thread is graded from 1.0 to 5.0 for dyed stockinette knits made from a mixture of processed yarns from undrawn yarns that have been worn for less than one day and those that have been aged for one month. I did it.

The larger the number, the better.

*2 Dyeing degree For the dyed knitted fabric obtained by the same dyeing as the nest tassels above, the dyeing degree is graded from 1.0 to 15.0 (numbers are dark dyed) and the dyeing is done within 1 day. The difference in dyeing degree from the undrawn yarn after one month of aging was defined as the change in dyeing degree.

The larger the number, the greater the change in dyeing degree. Show that.

Furthermore, during drawing and false twisting, the metal guides were significantly worn when processing undrawn yarns treated with oils E and F, and yarn breakage occurred frequently in undrawn yarns treated with oil G.

Example 2 350 treated with oil agents A, B, F, and G in Example 1
An undrawn polyester yarn with a single yarn count of 30 and a total denier of 250 spun at a take-up speed of 0 m/min was aged under the same conditions as in Example 1, at a draw ratio of 1.6 times, and under the same conditions as in Example 1. Table 2 shows the results of the same evaluation as in Example 1 for the crimped yarn obtained by drawing and heating processing.
It was shown to.

On the other hand, when yarn of 500 ky was continuously spun using the same oil agent and the same spinning machine, white powder was deposited on the traverse hook of the winding section due to the unevenness of the yarn surface, and when treated with oil agents A and B, there was only a slight amount of tension Fluctuations were small, but oils F and G
In the case of the treatment, a very large amount was deposited and the tension fluctuation was large.

Furthermore, during the drawing and false twisting process, yarn breakage frequently occurred in the undrawn yarns treated with F and G.

Claims (1)

[Scope of Claims] 1 Synthetic fiber undrawn yarn is made of (a) polyether which is a reaction copolymer of alcohol having 4 or more hydroxyl groups and ethylene oxide and propylene oxide and has a molecular weight of 1300 or more. 80% by weight, (b) Mineral oil with a redwood viscosity of 60" or more, aliphatic carboxylic acid ester of monohydric or polyhydric alcohol, aliphatic alcohol ester of aliphatic dicarboxylic acid, aliphatic alcohol ester of aromatic carboxylic acid with a molecular weight of 360 or more and a kinematic viscosity of 10
10 centistokes or more of one or more selected from the group consisting of dimethyl silicone and modified silicone.
~50% by weight, (e) a nonionic activator that is an alkylene oxide adduct of a compound having at least one aromatic ring, an alkylene oxide adduct of a partially esterified polyhydric alcohol, or an alkylene oxide adduct of a polyhydric alcohol The nonionic surfactant which is an aliphatic carboxylic acid ester of 10
~40% by weight, (d) 1 to 30% by weight of a phosphonate metal salt of a higher alcohol or alkylphenol added with propylene oxide and ethylene oxide, and (e) 1 to 30% by weight of an alkyl sulfonate metal salt. A method for treating undrawn yarn for crimping, comprising treating it with a treatment agent.