JPS58174624A - Preparation of interlaced yarn in high-speed spinning - Google Patents

Abstract

PURPOSE:To obtain the titled yarns, having improved weaving property and knitting property, and capable of giving woven or knitted fabrics of high grade, by treating yarns prepared by melt spinning at a high speed with an aqueous oiling agent solution containing a specific water-soluble polyester consisting of a compound containing a sulfonic acid group, etc., and interlacing the treated fibers with a fluid. CONSTITUTION:In preparing synthetic fibers by melt spinning a polymer at >=4,000m/min speed, the extruded yarns are treated with an aqueous oiling agent solution containing 0.1-7wt%, based on the total oiling agent components, water-soluble polyester consisting of a dicarboxylic acid, e.g. terephthalic acid, an alkylene glycol, e.g. ethylene glycol, and a bifunctional compound, e.g. 5- sodium sulfoisophthalate, having an SO3M group (M is H or metallic ions) and/or polyalkylene glycol, e.g. polyethylene glycol, and then interlaced to give the aimed interlaced yarns.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing interlaced yarn in high-speed spinning of synthetic fibers, and its purpose is to improve weavability and knitting performance when weaving and knitting high-speed spun wound yarn. The objective is to improve the quality of woven and knitted fabrics.

Generally, when producing thermoplastic synthetic fibers, a method is used in which the fibers are melt-spun, wound once, and then stretched in an abrasive drawing machine. There are two types of drawing machines: one type with a draw twister that heats at the same time as drawing, and one type with a draw winder that does not heat.
1! The Drone Ista type, which has a high degree of heating, is generally advantageous because it causes less deterioration in rope properties.

However, even in a drawing machine with one type of draw winder, undrawn yarn is untwisted when the undrawn yarn is scaled, so that a certain amount of actual twist is imparted to the yarn.

However, in recent years, with the development of ultra-high-speed spinning winding machines, it has become clear that spun yarn with yarn quality close to that of conventional drawn yarn can be obtained using only the high-speed spinning process, and it has become possible to weave and bind high-speed spun yarn. It is proposed that. According to this method, the conventional stretching process is completely unnecessary, resulting in a significant cost reduction and re-examination.

However, in this high-speed spinning, the winding machine is a non-twist winder from the viewpoint of high speed, so the wound yarn is a completely non-twisted yarn and is produced*, which causes the single yarns of the multifilament yarn to come apart during production. This has the disadvantage that the 1'-formability is significantly inferior to that of conventional drawn yarns.

In order to solve this problem, attempts have been made to impart binding properties by sometimes using a fluid to interlace single yarns during winding.
? Since the weaving speed is extremely high at ++/min or more, generally 6000 yam/min or more, there is a problem in that almost no intertwining occurs, and weavability and manufacturability are still often poor.

On the other hand, attempts have been made to improve the spinning oil for synthetic 11lt fibers and impart conjugation properties to the yarn. For example, there have been attempts to add sizing agents to the spinning oil and to mix high-density waste materials such as wax into the oil. A generally known method is to carry out assimilative conjugation using heat treatment during elongation. However, such oil compositions contain many problems. That is,
When these spinning oils are used, sticky scum is generated during the manufacturing process and accumulates in large quantities on the fluid entanglement treatment nozzle and guide system, requiring frequent cleaning and severely reducing production efficiency. There is a bowl of noodles. In addition, especially in the method of using an oil containing a high melting point substance, no effect is exhibited at all in the high-speed spinning that is the object of the present invention because the heating means of the heater of the Sagi stretching machine is not used.

As mentioned above, the proposals to date to improve the conjugation of threads by improving the oil agent have not yielded fully satisfactory results.

Therefore, the present inventors focused on the combination of the conventionally known fluid entangling (interlacing) treatment and a conjugated spinning oil, and conducted various studies.

However, if these two treatments are simply combined, sufficient conjugation may not be obtained, or problems may occur (such as scum being deposited during the entangling process), resulting in a completely satisfactory result. I couldn't.

The present inventors have made extensive studies to resolve this vague point, and as a result, the degree of entanglement (interlace The inventors have discovered that the present invention has been developed based on the discovery that extremely excellent effects can be obtained.

That is, when producing a 11t fiber by spinning at a speed of 4,000 m/min or more, it is necessary to use a dicarbonate, an alkylene glycol, and a K110. A bifunctional compound having an M group (M represents hydrogen or a metal ion) and/or
Alternatively, after treatment with an aqueous oil solution containing a water-soluble polyester made of polyalkylene glycol in an amount of 0.1 to 5% by weight of the total oil agent function, a fluid entanglement treatment is performed.
This is a method for producing interlaced yarn in high-speed spinning with characteristics I.

The method of the present invention can be applied to all synthetic fibers that can be melt-spun, such as polyester fibers and polyamide fibers, but its effects are particularly remarkable when applied to polyester fibers.

The method of the present invention combines a treatment with a spinning oil containing a special water-soluble polyester and an entangling treatment.
The water-soluble polyester added to the spinning oil includes dicarbonate, alkylene glycol, and 110. It consists of a bifunctional compound having an M group (M is hydrogen or a metal ion) and/or polyalkylene glycol.

The dicarboxylic acid components are aromatic, aliphatic, and aliphatic dicarboxylic acids, such as oxalic acid, malon, dimethyl malon, adipic acid, trimethyl adipic acid, and pimeline.

2.2 dimethyl geltaric acid, azelaic acid, sebacic acid, fumaric acid, maleic acid, itaconic acid, 1.3 cyclopentanedicarboxylic acid, 1.2 cyclohexanedicarboxylic acid, 1.3 cyclopentanedicarboxylic acid, 1.4 Cyclohexane dicarboxylic acid, phthalic acid, terephthal Wkl inphthal #12.5 norbornanedicarboxylic acid, 1.4 naphthalyl siphenic acid, 4.4'oxybenzoic acid, diglycolic acid, thiodipropionic acid, 4.
Examples include 4'sulfonyl dibenzoic acid and 2.S-7thalene dicarpone, and among these, terephthalic acid and isophthalic acid are preferred.

As alkylene glycol components, ethylene glycol, propylene glycol, diethylene glycol, 2
- 4 dimethyl 2 ethylhexant 3 diol, 2 ethyl 2 butyl 37' ws pandiol, 2, 2 dimethyl 3 propane diol, 2 ethyl 2 isoptil 3 propane diol, 1 3 butanediol, 1 4 butane diol.

l・5bentanediol, trohexanediol.

2,2,4 trimethylto6 hexanediol, 1,2 cyclohexane dimetatool, 1,3 cyclohexane dimetatool, 1,4 Schif 1g 6'xane dimetatool,
2, 2, 4, 4 tetramethylto 3-cycouptanediol, 4, 4' thousand osyphenol, 4, 4' methylene diphenol, 4, 4' (2, norbornylidene) diphenol, 4, 4' dihydroxybiphenol.

・-, m- and tFp-dihydroxybenzene, 4・4'
Examples include inpropylidene diphenol, 4,4 isopylidene bis(2,6 dichlorophenol), 2,5 naphthalene diol, and p-xylene diol, and among these, ethylene glycol and diethylene glycol are preferred.

Examples of the polyalkylene glycol component include polyethylene glycol and polypropylene glycol.

The role of polyalkylene glycol is to strengthen the bond between the fibers and the water-soluble polyester, and also to provide flexibility to the water-soluble polyester.

Examples of bifunctional compounds having a -80,M group (M is hydrogen or a metal ion) include -40,M group-containing dicarboxylic acid diols and oxyacids.

As for M, LI”, Na”, K”, Mg+, C
a”, Cu”, Fe” or Fe”, and Na”
, Ll+ are preferred.

Examples of the compound include those in which the -80,M group is directly bonded to an aromatic nucleus and are represented by the general formula %.Specifically, sulfoisophthalic acid, sulfoterephthalic acid, sulfophthalic acid, or -Metal salts such as sulfonaphthalene 2.gamma dicarboxylic acid, 4-radiosulfophenyl-3-5-dicarbomethoxybenzenesulfonate, 4-lithiosulfophenyl 3.S-dicarpomethoxybenzenesulfonate and 6-radiosulfophenyl 3.S-dicarbomethoxybenzenesulfonate. 2-naphthyl 3,5 dicarbomethoxybenzenesulfone), 5-(4-(sodiosulfone)
-Phenoxy]dimethyl isoheptarate #5-((
Examples include dimethyl sodiosulfo)-phenoxycoterephthalate and [4-(sodiosulfo)phenoxy]isophthalate.

Among these, sodiosulfoisophthalic acid to which Na metal is bonded is particularly preferred. These compositions and ratios are not particularly limited as long as the obtained polyester is water-soluble, but a copolymerized polyester of 9120 to 40 mol of sodiosulfoisophthal is preferable.

The obtained polyester has an intrinsic viscosity (!V) of 0.15~
It is a stable polymer at room temperature in the order of 0.5 degrees, and when dissolved in water or hot water, it becomes transparent or in a suspended state.

The treated oil containing the skeleton polyester forms a strong film on the yarn, has a particularly good affinity for polyester fibers, and can greatly improve the binding properties and fuzz resistance of the yarn.

As the oil to which such water-soluble polyester is added and blended, conventional aqueous spinning oils can be used as they are. The aqueous oil solution containing the water-soluble polyester may be prepared by simultaneously emulsifying the oil component, the water-soluble polyester, and V in water, or by adding one of them from a bale. Even if K and □ are changed, the emulsion stability of the aqueous oil solution is not affected at all.

In this case, it is necessary that the blending ratio of the water-soluble polyester to the total oil component, that is, the effective oil component contained in the aqueous oil solution plus the water-soluble polyester, is 0.1 to 7% by weight. , 5 ~ z, o weight -
is preferred.

If the blending ratio of the water-bathable polyester is small, it will not be possible to obtain the 6b* conjugation properties and the effect of suppressing the generation of fluff, which are the objectives of the present invention in improving weavability and knitting properties.

On the other hand, if the blending ratio is too large, the problem arises that the rolled up package becomes sticky and the unwinding performance deteriorates, which is not preferable.

The total concentration of oil components in the aqueous oil solution is desirably about 5 to 15% by weight, and an amount of O, S to about 1.0% by weight attached to the fibers is sufficient.

After the spun yarn melt-spun at a speed of 40,001/share and above is treated with the above-mentioned aqueous oil solution, it is subjected to an entangling treatment before winding.

The present invention requires a combination of the specific aqueous oil solution treatment and entanglement treatment, and the object of the present invention cannot be achieved without either of them.

The fluid entanglement process refers to a process in which the single yarns constituting the yarn are entangled with each other by a fluid agitation flow to impart binding properties to the yarn. Examples are disclosed.

Here, when performing the fluid entanglement treatment, it is preferable to perform the entanglement treatment using a gas heated to a temperature higher than the glass transition point of the synthetic fiber to be treated. In contrast to the conventional entanglement treatment using compressed air at room temperature, when heated pressurized air or heated steam is used, the flexibility of m-fibers increases and entanglement occurs, especially for rkA8L, which has a temperature higher than the glass transition point of the synthetic fiber being treated. As the fiber strength increases, the affinity of the water-soluble polyester coating for the fibers increases, which has the important effect of dramatically improving yarn binding.

In the present invention e (e), the combination of an aqueous oil solution containing a water-soluble polyester and an entangling treatment can improve the binding property of yarns more than the combination of the two. It is important to note that the degree of interlace (interlace I!L) is greatly improved by this method.The reason for this is not clear, but it is probably because the water-soluble polyester attached to the fibers has a large effect on the interlace mechanism of the fibers. Giving(
・It seems that

As explained above, in the present invention, since the aqueous oil solution treatment containing a specific water-soluble polyester is combined with the entangling treatment, sufficient conjugation is achieved even in yarns running at high speeds of 4000*/min (・5). is obtained, and it is possible to avoid troubles such as yarn breakage due to single yarn peeling even when making paper or knitting as is.Furthermore, when it is entangled with a gas at a temperature higher than the glass transition point of the synthetic fiber being processed, it becomes even more dramatic. It becomes possible to increase the conjugation property and achieve extremely good weaving and knitting properties.

Hereinafter, the present invention will be explained in further detail with reference to Examples.

Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.64 was melt-spun, and aqueous oil solutions of various compositions shown in Table 1 were applied to the spun yarn using a conventional oil application device, and then spun with a pair of pulling rollers. After the yarn was taken up, the yarn was entangled using a fluid entangling nozzle, and a 1.75 denier 36 filament multifilament yarn was wound up at 5 ooo in 7 minutes. The amount of all the oil components attached to the yarn was adjusted to i, o weight -. Here, the water-soluble polyester was 9140 parts by weight of 5-sodiosulfoisophthal.

60 parts by weight of terephthalate, 56 parts by weight of ethylene glycol, and 0.57 parts by weight of catalyst were reacted, and after the transesterification reaction, the temperature was raised to 285'C to carry out a polymerization reaction, resulting in an intrinsic viscosity of 0. IIIS water-soluble polyester was used. On the other hand, as a paste oil agent, the following composition amount, which has been conventionally used, was used.

The winding machine is an 8W 41S 880 winder made by Barmarg with a traverse stroke length of 1709, and the fluid entanglement treatment nozzle is a Japanese Patent Publication No. 36-12230.
The nozzle shown in Figure 37 was used, the air pressure of the nozzle was 5 kty/d, and the running yarn tension at the nozzle portion was 12 gr.

The degree of interlacing and conjugation of the obtained yarn were measured by the methods described later, and the results are shown in Table 1. Next, it was woven in a water jet loom using a threaded weft. The results are also shown in Table 1. The water jet loom was of the LW-41 type (5,000 warp yarns were drawn from ordinary polyester fabric, 75 denier, 36 filamen). The loom rotation speed is 4s.

Plain weave taffeta was woven at a speed of 300 threads per minute. In addition, each experiment with a mark of 1 indicates that it is a comparative example.

As is clear from Table 1, according to the method of the present invention, the degree of interlacing increases several times and yarns with excellent conjugation properties are obtained, and it is possible to obtain threads with excellent interlacing properties, and to avoid problems caused by weft defects during the weaving process. It is clear that the effects of the present invention are remarkable, as there are fewer problems, the loom operating rate is good, and there are no troubles such as reed scum accumulation. Note that when the blending ratio of water-soluble polyester is high, the binding of the yarn is good (), but the entire pancage becomes sticky and the unwinding performance deteriorates, resulting in an increase in loom stoppages and reeds. Scum accumulates and is harmful.

In addition, the interlacing degree and conjugation property of the yarn were measured by the method described below.

<Interlacing degree of yarn> Entang! made by RoTHscaxt, n. Rement tester (IN〒＾NGI, ΣMI
Nτ ding! Using 8T]C1)H2onoJ, measurements were taken at the sO point of each sample under the conditions of a running tension of 10gr and a lift-off force of 18gr, and the average value is shown.

<Compatibility of threads> The threads were gently floated in a 1-meter water bath, and the state in which the threads opened and separated due to the surface tension of the water was visually determined. Violet indicates good conjugation, and S indicates no conjugation required, on a five-point scale.

*11sf4 x High-speed spinning was performed in exactly the same manner as in Example 1, except that water vapor was used as the fluid for the entanglement treatment and the spinning speed was 600011/min. The temperature of the water vapor was variously changed as shown in Table 2 using an electric heater installed immediately before the entangling treatment nozzle. Table 2 shows the properties of the obtained yarn and the test results on a water jet loom loom. The amount of water-soluble polyester added is 5.0 in each case.
Weight%.

As is clear from Table 2, by using water vapor as the entangling fluid at a temperature higher than the glass transition point (73°C) of the polyester fiber used in this experiment, aooo*/
It is clear that even at high speeds of minutes, the degree of interlacing and the conjugation of fibers are dramatically improved, there are fewer stops due to the weft diagram in the weaving process, and the loom operating rate is good, so it is clear that the effects of the present invention are remarkable. .

Claims (1)

[Claims] 1.4000. / When producing synthetic fibers by melt spinning at a preparative speed, the spun yarn is mixed with dicarboxylic acid, alkylene glycol, and 80%. Treatment with an aqueous oil solution containing a water-soluble polyester made of a bifunctional compound having an M group (M represents hydrogen or a metal ion) and/or polyalkylene glycol in an amount of 0.1 to 7% by weight of the total oil component. A method for producing an entangled yarn in high-speed spinning, which comprises performing a fluid entangling treatment after the above-mentioned steps. 2. Claims jl! in which the fluid entanglement treatment is carried out using heated gas at a temperature higher than the glass transition point of the synthetic fibers! The method described in 1M.