JPS5824557B2 - Processing method for undrawn yarn for crimping - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an undrawn yarn suitable for crimping, particularly a "drawn false twisting" 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 this undrawn yarn at high speed, it is possible to reduce fluctuations in various tensions such as winding tension due to fluctuations in friction with contact bodies, and thereby to provide a crimped yarn with no nests. In addition, a method for processing undrawn yarn for crimping that provides good shape uniformity (referred to as winding shape) of the winding package during high-speed spinning, excellent unwinding properties during crimping, and extremely minimal yarn breakage problems. It is related to.

Conventionally, crimped yarn has been produced through a series of steps in which undrawn yarn spun in a spinning process is once processed by various crimping methods in a subsequent drawing process.

However, recently, in order to improve production efficiency by shortening these steps, a method of manufacturing crimped yarn by sequentially or simultaneously performing drawing and false twisting has been developed.
"Stretch false-twisting" processing began to be carried out.

It is generally advantageous to use an undrawn yarn spun at a higher speed (1700 rn for 7 minutes or more) than conventionally as the undrawn yarn used in this drawn false twisting process.

This is because productivity is improved and the undrawn yarn has excellent initial loss resistance 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 nests.

The present inventor conducted various analyzes on the causes of such tufts, and found that tufts are largely due to physical property changes that occur over time while the spun undrawn yarn undergoes drawing and false twisting. Although this change in physical properties over time tends to be small in undrawn yarns spun at high speeds,
On the other hand, various tensions such as winding tension increase, and friction fluctuations with various guides during winding, such as thread separation guides, traverse hooks, etc., become large, and when the winding is severe, the fibers are scraped and white powder is generated on these guides. The undrawn yarn will have larger stress unevenness due to the increase in tension fluctuation caused by the accumulation, which will induce nests in the crimped yarn produced by the subsequent drawing and false twisting process. I understand.

In other words, the time that the undrawn yarn supplied to the drawn and false-twisted process is left to stand after being spun until it is processed is the same as that used to obtain crimped yarn by false-twisting the drawn yarn in the past. , depending on transportation and long-term storage, it may take 1 to 2 months, or even 6 months.
Generally, it is aged for a long period of about a month.

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, in knitted fabrics and fabrics in which processed yarns with different degrees of dyeing obtained from undrawn yarns of different ages are used at the same time, there are many sushi-like nests 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 dividing the undrawn yarn into lofts over time are required, but such operations are extremely complicated and not only reduce production efficiency, but also require the current complicated fiber distribution mechanism. It is no exaggeration to say that it is almost impossible.

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 oil applied to the undrawn yarn during 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 found that when using an oil mainly composed of a specific high-molecular-weight polyether that has propylene oxide groups and ethylene oxide groups in the molecule, changes over time The present invention was achieved by discovering that this can be suppressed.

[That is, in the present invention, undrawn synthetic fiber yarn is made of (a) 35 to 95% by weight of a polyether having a molecular weight of 1300 or more, which is a reaction copolymer of an alcohol having 4 or more hydroxyl groups, and ethylene oxide and propylene oxide. ,(
b) Nonionic alkylene oxide adducts of compounds having at least one aromatic ring in the molecule, alkylene oxide adducts of partial ester polyhydric alcohols, and aliphatic carboxylic acid esters of alkylene oxide adducts of polyhydric alcohols. 4 to 50% by weight of one or more selected from the group consisting of activators, (C) 1 to 30% by weight of a higher alcohol with ethylene oxide and propylene oxide added or a phosphonate metal salt of alkylphenol; d) A method for treating undrawn yarn for crimping, characterized by treating it with a treatment agent containing 1 to 30% by weight of an alkyl sulfonate metal salt.

"Synthetic fiber undrawn yarn" as used herein refers to all synthetic fiber undrawn yarns that can be stretched and false-twisted.
The present invention is particularly effective for undrawn polyester yarns, where changes in undrawn yarns over time are an important problem.

In the present invention, as a processing agent for treating such undrawn synthetic fiber yarn, a 1300-molecular-weight compound obtained by random or block copolymerization of ethylene oxide and propylene oxide to an alcohol having four or more hydroxyl groups is used.
It is important to use polyethers mainly composed of the above polyethers.

The alcohol which is the addition base constituting the polyether is a compound having at least four or more hydroxyl groups in the molecule, such as pentanylthritol, dipentaerythritol, sorbitol, and aliphatic carboxylic acid esters thereof. ethylene oxide and propylene oxide are added thereto in the form of random or block copolymerization.

At least 130 o
It is necessary to have a molecular weight of lfl, and it is preferable that the polymerization ratio of ethylene oxide and propylene oxide is increased.

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 because there is no diffusion and permeation of the dye, and changes in physical properties that would cause changes in dyeing over time are suppressed.

If the molecular weight is less than 1300, this effect will not be sufficient, and if the added base alcohol is trivalent or less, this steric effect will be small, and the undrawn yarn will not be left in a high temperature environment of 40°C or more. If this is done, sufficient effects cannot be achieved in terms of changes in dyeing over time.

The content of the polyether in the treatment agent (non-aqueous component) is 35
~95% by weight is preferred.

When the treatment agent is used in the spinning process in the present invention, the treatment agent is generally used in the form of an aqueous emulsion, and in this case, 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 low molar adducts of propylene oxide, low molar adducts of benzylphenylphenol with ethylene oxide or propylene oxide], or alkylene oxide adducts of partially esterified polyhydric alcohols, or aliphatic carboxylic acids of alkylene oxide adducts of polyhydric alcohols. Nonionic surfactants that are esters [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 penquerthritol Dialkylate, or (methylolpropane with ethylene oxide binding) tristearate, (methylolpropane with ethylene oxide) distearate, (ethylene oxide with calotrimethylolpropane) distearate, (methylolpropane with ethylene oxide) ) Monostearate dipalmitate, (ethylene oxide added sorbitol) trilaurate, (ethylene oxide 14t770 pentanyl thritol) dilaurate, (ethylene oxide added sorbitol) monolaurate, etc. may be used alone or in combination. is desirable.

Suitably, such surfactants are present in an amount of 4 to 50% by weight during treatment.

The above-mentioned processing agent has the advantage that when used in high-speed spinning, there is no deterioration in the winding appearance that occurs when processing with general polymeric polyethers.

The reason for this is not necessarily clear, but in general, the winding tends to deteriorate as the filaments become more slippery due to the lubricating agent. It is assumed that this is because the friction between the filaments increases due to the steric effect based on molecular branching due to the addition of an alcohol with a higher alcohol content.

On the other hand, the present inventor discovered that at high speed spinning (1,700 m/min or higher, tension such as winding tension increases, especially at 2,500 m/min).
(This tendency becomes more pronounced at speeds exceeding 1 minute)
For example, as a result of extremely high friction in the yarn parting guide, traverse hook, etc., tension fluctuations increase, causing stress unevenness in the wound undrawn yarn, which causes the crimping effect obtained by the subsequent drawn and false twisting process. Recognizing that this tendency often increases as the spinning speed increases, in order to carry out the present invention more advantageously in such a high-speed spinning-false twisting process, It has been found that it is desirable to contain a special phosphonate metal salt activator in order to reduce this tension fluctuation as much as possible.

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

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

Furthermore, in the present invention, it is desirable to contain an ionic activator in the treatment agent in order to suppress static electricity generated during the stretching and false-twisting process. 1% by weight of alkyl sulfonate Na salt or Na salt obtained from
It is desirable to use the above.

When using such an ionic activator, if the amount exceeds 30% by weight, there will be a problem with heat resistance, so it is preferable to use 30% by weight or less.

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. The amount of treatment agent to be applied to undrawn yarn is generally such that the amount of treatment agent (non-aqueous component) per weight of fiber is 0.2 to 0.2 to 100.
It is desirable to adjust the content to 1.0% by weight.

According to the present invention as described above, the change over time of the undrawn yarn is significantly reduced, and even when the undrawn yarn is aged under high-temperature environmental conditions exceeding 40°C, the same degree of dyeing is semi-permanently maintained. Therefore, the crimped yarn with small nest tufts and
Also, knitted and woven fabrics 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 a significant improvement in the tufts of the final crimped yarn, resulting in a good quality yarn. be able to.

The present invention is most effectively used when performing a drawing 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.

Example 1 After spinning molten polyethylene terephthalate from a spinneret to form yarn and passing it through a cooling zone, a 15% by weight aqueous emulsion of oil agent A was treated using an oiling roller, and then at a circumferential speed of 1800 m/min. It is wound through a take-up roller that rotates in
A denier undrawn polyester yarn A was obtained.

Yarn B-G was obtained by similarly treating with oil agents B-G.

These undrawn yarns A-G were aged within one day after spinning, and then stretched at a stretching ratio of 2.4 times, a heater temperature of 195°C, a spinner rotation speed of 320,000 rpm, and a number of twists of 2,550 pieces/m. Stretching and false twisting were performed simultaneously to obtain a crimped yarn.

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

Next, the crimped yarns obtained from the undrawn yarn aged within 1 day and the undrawn yarn aged 1 month were made into circular knitted knitted yarn with a width of 10 mm, and this was dyed in the same dyeing bath under the conditions described below. I did it.

Table 1 shows the nests and changes in the degree of staining.

Dyeing conditions Dye: Eastman Polyester Blue GLS 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, continue dyeing for 90 minutes, and then After washing at 40° C. in a 189/l monogen bath, the sample was thoroughly washed with water.

Oil composition content P, 0 is propylene oxide group, E, 0 is ethylene oxide group, P, 07E, 0 is their copolymerization ratio, ()
represents the weight ratio.

The blending ratio of the components was expressed in weight %.

Oil agent A (example of the present invention) Pentanylthritol P, 0/E, (X80/20) random adduct (molecular weight 1500) 80% E, 0
(10 mol) Added nonylphenol 12P,0 (2
mol)/E, 0 (3 mol) added lauryl phosphate to salt 5 alkyl sulfone-to-Na salt 3 Oil agent B (example of the present invention) Sorbitol P, 0/E, 0 (60/40) random adduct ( Molecular weight 5000) 70% E, 0 (5 mol) nonylphenol 6(E, 0 (24 mol) addition trimethylolpropane) distearate
9 P, 0 (2 mol) / E, 0 (6 mol) addition isocetyl phosphate Na 10 Salt to alkyl sulfonate 5 Oil agent C (example of the present invention) Dipentaerthritol P, 0 / E, 0 (75 /2
5) Random adduct (molecular weight 6000) 50%E, 0
(10 mol) Added pendyl phenylphenol
25 (yeE, 0 (6 mol) added nonyphenol 20P, 0 (3 l)/E, 0 (2
mole) addition of salt to lauryl phosphate 3
Alkyl sulfonate Na salt 2 oil agent D
(Example of the present invention) Pentanylthritol P, O/E, 0 (85/15) block adduct (molecular weight 5000) 40% Pentanylthritol P, 0/E, 0 (75/25) block adduct ( Molecular weight 2000) 20E, 0 (
10 moles) benzylphenylphenol
19E, 0 (5 mol) Benzyl phenylphenol
10P,0 (5 mol) E,0 (4 mol) Addition of salt to lauryl phosphate
7-alkyl sulfone) Na salt
4 Oil agent E (comparative example) Butanol P, 0/E, 0 (50150) random adduct (molecular weight 1500) 80% E, 0 (6 mol) addition lauryl alcohol 12E, 0 (10 mol) Attachment 71JI] Nonphenol 5E ,0 (3 moles)
Addition of salt to lauryl sulfate
3 Oil agent F (comparative example) Trimethylolpropane P, 0/E, 0 (60/40) random adduct (molecular weight 1300) 75% E, 0
(8 mol) Addition oleyl alcohol 10E, 0 (2
0 mol) Added castor oil 5 Dioctylsulfosuccinate N 10 Oil agent G (Comparative example) Diethylene glycol P, 0/E, 0 (30/70) adduct (molecular weight 1700) 60% E, 0 (10 mol) Added sorbitan Monolaurate
25E, 0 (8 mol) added lauryl alcohol 10.

E, 0 (5 mol) added salt to lauryl forsshite
5 Explanation of evaluation items *1 Dyeed stockinette knit from false-twisted yarn obtained by stretching and false-twisting undrawn yarn that has been aged for one month after splotching,
For dyed stockinette knits using a mixture of processed yarns from undrawn yarns aged within 1 day and after 1 month, the nests were graded from 1.0 to 5.0.

The larger the number, the better.

*2 Dyeing degree For dyed knitted fabrics obtained by the same dyeing as the nests above, the dyeing degree is graded from 1.0 to 15.0 (number holes are dark dyed) and the aging and aging are 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.

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 false twisting.
It was shown to.

On the other hand, when 500 kg of yarn was continuously spun using the same oil and the same spinning machine, white powder was deposited on the traverse hook at the winding section due to the scratches on the yarn surface, and oil agent A was used.

In the case of treatment with oil B, the fluctuation in tension was slight and small, but in the treatment with oils F and G, a large amount was deposited and the fluctuation in tension was large.

In addition, packages treated with oils A and B had good winding appearance, while oils F and G resulted in many packages with poor winding appearance due to twilling.

For this reason, in the latter case, yarns with poor unwinding properties during drawing and false twisting frequently occurred.

Claims (1)

[Claims] 1 Synthetic fiber undrawn yarn is made of (a) 35 to 95% by weight of a polyether having a molecular weight of 1300 or more which is a reaction copolymer of alcohol having 4 or more hydroxy groups and ethylene oxide and propylene oxide, (b) molecule From nonionic activators that are alkylene oxide adducts of compounds having at least one aromatic ring therein, alkylene oxide adducts of partial ester polyhydric alcohols, and aliphatic carboxylic acid esters of alkylene oxide adducts of polyhydric alcohols. 4 to 50% by weight of one or more selected from the group consisting of (C) 1 to 30% by weight of a higher alcohol with ethylene oxide and propylene oxide added or a phosphonate metal salt of alkylphenol; and (d) alkyl. 1 sulfonate metal salt
A method for treating an undrawn yarn for crimping, the method comprising treating an undrawn yarn for crimping with a treatment agent containing ~30% by weight.