JPH0967727A - Stretch-breaking of filament yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably perform stretch-breaking while random stretch-breaking property is maintained even in a low humidity by combining filament yarns treated with a finishing oil which is solid at normal temperature under the absolute dry condition with filament yarns treated with a finishing oil which is liquid at normal temperature under the absolute dry condition. SOLUTION: Filament yarns treated with a finishing oil which is solid at normal temperature under the absolute dry condition are combined with filament yarns treated with a finishing oil which is liquid at normal temperature under the absolute dry condition and the combined yarns are subjected to stretch- breaking. In the system, convergent property can be kept while the random stretch-breaking property is maintained even in low humidity and uniform spun- like finished yarns are obtained in high operability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drafting a filament yarn, and more particularly to a method for drafting a filament yarn to obtain a stable and high quality spun-like yarn.

[0002]

2. Description of the Related Art In recent years, the draft cutting process of filament yarn has been
As a new synthetic fiber material manufacturing method not only for the simple and low-cost production of fibers with a spun-like texture, but also for the easy production of spun-like processed yarns with unprecedented new texture and physical properties. , The development and deployment of technology.

In such a drafting method, an oil agent which has been frequently used for spinning has been applied to the filament yarn as it is, or an oil agent obtained by slightly modifying the conventional spinning oil agent has been applied. It was

For example, Japanese Examined Patent Publication No. 1-20264 proposes a processing agent for draft spinning containing an alkyl phosphate potassium salt and a fatty acid alkali metal salt. However, in the case of carrying out the drafting processing using this processing agent for drafting spinning, the drafting property is good when the drafting processing is carried out at room temperature and normal humidity, and a high quality spun-like processed yarn is obtained. When the drafting process is performed in an extremely dry state where the humidity is extremely low, the concentrating property of the treatment agent is lost, wrapping around the feed roller is likely to occur, the process productivity is deteriorated, and the obtained spun-like processed yarn is obtained. There was a problem that the quality of the product also deteriorated. The draft cutting process of filament yarn is
Usually, it is performed in a place where the relative humidity changes from 10 to 70% RH depending on the season, so this is a big problem in performing the drafting process.

On the other hand, an oil agent composition which is a liquid at room temperature and completely dried, has a redwood viscosity of 100 seconds or less as a main component, and has an adhesive force of 100 g / cm ² or less, based on the weight of fiber. A method of depositing 0.05 to 0.5% by weight and performing a drafting process (Japanese Patent Laid-Open No. 5-287619) has also been proposed. However, in this method, since the oil agent is a liquid, even if a low-adhesive agent is used, the adhesive force is still too high, the yarn is difficult to be opened during the check-cutting process, and the random check-cutting property is insufficient. Then, the quality of the obtained spun-like processed yarn is not enough, and further, when the adhesiveness of the oil agent becomes large, a large number of filaments are chopped at once, so-called collective chopping, and a chopping roller. There is still a problem that the threading rate frequently occurs at the shooter portion provided on the upper part of the machine and the processing productivity is reduced.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the problems of the prior art and enhances the bundle-converging property to the extent that it does not deteriorate the draft cuttability of the filament yarn at the time of draft cut processing even under low humidity. Stable processing is possible without wrapping around the feed roller or yarn breakage at the shooter. Furthermore, since random drafting property is maintained, high-quality spun-like processed yarn is obtained. It is an object to provide a cutting method.

[0007]

Means for Solving the Problems As a result of various studies to solve the above problems, the present inventors have found that a filament yarn provided with an oil agent which is solid at room temperature and an absolute dryness at room temperature and an absolute dryness. Surprisingly, when the filament yarn to which the oil agent which is a liquid is added is mixed and subjected to the drafting process, the filament yarn bundle is maintained in the bundled state even at the time of the drafting process even in a low humidity condition, and the random drafting is performed. The present invention has been completed by finding that stable drafting can be performed without lowering the cutting property.

That is, according to the present invention, (1) when a plurality of filament yarns are mixed and subjected to a check-cut process to produce a spun-like processed yarn, an oil agent which is solid at room temperature and absolute dryness is added. (2) Stretch-cutting method of filament yarn, characterized by mixing and filament-filament yarn and filament yarn to which an oil agent that is a liquid is added at room temperature to dry, The filament yarn draft check processing method according to (1), wherein the ratio of the number of single yarns of the filament yarns to which the oil agent which is a liquid is applied is 10 to 50% of the number of single yarns of all the filament yarns. And (3) the filament yarn is made of polyester (1) or (2)
Provided is a method for drafting a filament yarn as described.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An oil agent (hereinafter referred to as a liquid oil agent) used in the present invention which is liquid at room temperature and absolutely dry includes
For example, an oil agent described in JP-A-5-287619 can be mentioned. That is, an aliphatic alkyl ether-based activator obtained by adding an alkylene oxide to an alcohol such as lauryl alcohol, oleyl alcohol, and other synthetic alcohols and an alkylene oxide containing a low-viscosity mineral oil as a main component (65 to 80% by weight). At least one of nonionic activator components such as ether ester activator which is a reaction product of added aliphatic alkylene alcohol and fatty acid, reaction product of polyethylene glycol and fatty acid such as lauric acid and oleic acid (20 to 30% by weight), and if necessary,
Anionic activators such as phosphates, sulfonates, and sulphates, cationic activators, and emulsification modifiers such as fatty acids and alcohols are appropriately added.

On the other hand, as the oil agent (hereinafter referred to as a solid oil agent) which is solid at room temperature and absolutely dry in the present invention, for example, a metal salt of an alkyl phosphate ester described in Japanese Patent Publication No. 52-31999. Examples thereof include an oil agent containing the main component and an oil agent containing 40% by weight or more of an alkyl phosphate potassium salt and a fatty acid alkali metal salt described in JP-B-1-20264. In the latter case, examples of the alkyl group of the alkyl phosphate potassium salt include a lauryl group, cetyl group, and stearyl group, and examples of the fatty acid of the fatty acid alkali metal salt include capric acid, lauric acid, myristic acid, and palmitic acid. , Oleic acid, ricinoleic acid, stearic acid, isostearic acid and the like. This oil agent further includes mineral oil, fatty alcohol,
Nonionic activators such as ethylene oxide adducts of fatty acids and ethylene oxide-propylene oxide copolymers, and cation activators such as quaternary ammonium salt type cation compounds and amine salt type cation activators can be added. Other than this, examples of solid oil agents include ethylene oxide adducts of fatty acids.

In the case of a liquid oil agent, these oil agents are in the form of an aqueous emulsion, a straight or a low-viscosity solvent solution (emulsion is preferable from the viewpoint of handleability and operability),
In the case of solid oil solutions, in the form of an aqueous emulsion, the dipping method,
It is applied to the filament yarn by an oiling roller method, a spray method, a nozzle oiling method or the like. In the former case, the amount of the oil agent attached is preferably 0.01 to 0.3% by weight, more preferably 0.01 to 0. 1% by weight, and in the latter case, it is preferably 0.05 to 0.5% by weight, more preferably 0.1 to 0.3% by weight.

The filament yarn used in the present invention is any filament yarn such as polyamide, polyester, polyacrylonitrile, etc. In particular, polyester is preferably used from the viewpoint of feeling. As polyester,
Polyesters containing terephthalic acid as a main acid component and ethylene glycol, trimethylene glycol, tetramethylene glycol and other alkylene glycols as a main glycol component are preferable, and specifically, polyethylene terephthalate, polybutylene terephthalate, and a small amount of these polyesters Examples thereof include copolymerized polyesters obtained by copolymerizing isophthalic acid, 5-sodium sulfoisophthalic acid and the like. These various polymers may be used as a mixture, usually used matting agent, stabilizer,
You may contain additives, such as an antistatic agent, a coloring agent, and a flameproofing agent.

The single yarn denier of these filament yarns is preferably 0.3 to 15 de from the viewpoint of drafting property and feeling,
Particularly, 1 to 3 de is preferable. Further, the filament yarn provided with the liquid oil agent and the filament yarn provided with the solid oil agent may have the same single yarn denier or different denier. The ratio of the number of single filament yarns to which the liquid oil is applied is 10 to 5 of the number of single filament yarns of all filament yarns.
It is preferably 0%, more preferably 20 to 40.
%. When the ratio of the number of single yarns of the filament yarn to which the liquid oil agent is applied is too small, the influence of the solid oil agent becomes strong, and conversely, when the ratio of the number of single yarns of the filament yarn to which the liquid oil agent is applied is too large, the liquid oil agent The influence of
The random drafting property tends to decrease, the quality of the obtained spun-like processed yarn tends to deteriorate, and the processing productivity tends to become unstable.

When the filament yarn is cut off,
The filament yarn to which the solid oil agent is applied and the filament yarn to which the liquid oil agent is applied need to be mixed in advance. The method is as follows: (1) 2 groups of filament yarns spun from the spinneret In which the solid oil agent is applied to one side and the liquid oil agent is applied to the other side, and then the yarn is spun and wound up, and then drawn, in the method of (2) and (1), after the spinning and spun yarn. A method of continuously drawing without winding once, (3) a method of applying a solid oil agent and a liquid oil agent, respectively, and spinning, and a method in which both wound filament yarns are combined and drawn, (4) a solid oil agent It is possible to use a method in which both liquid filaments are applied and spun, and both filament yarns that are drawn and wound are combined and mixed.

In order to mix the filament yarn to which the solid oil agent is applied and the filament yarn to which the liquid oil agent is applied, it is preferable to actively mix both filament yarns through a fluid nozzle or the like. Both filament yarns are sufficiently mixed due to the winding tension and the drawing tension even if the yarns are combined.

In this way, after the filament yarn to which the solid oil agent is applied and the filament yarn to which the liquid oil agent is applied are mixed, a check-cutting process is performed. The check-cutting process is shown in FIG. 1, for example. It can be carried out using such a drafting device.

In FIG. 1, reference numeral 1 denotes a package in which a yarn obtained by mixing a filament yarn to which a solid is applied and a filament yarn to which a liquid oil agent is applied is wound, and a mixed fiber unwound from the package 1. Thread Y to feed roller 2
After the sheet is stretched between the sheet feeding roller 3 and the sheet feeding roller 3, the air nozzle 4 binds the sheet, and the winding roller package 7 is wound around the winding roller 5 and the guide 6. Reference numeral 8 denotes a shooter provided on the top of the drafting roller 3.

The drafting speed (peripheral velocity of the drafting roller 3) is usually 200 to 800 m / min, and the drafting magnification between the feed roller 2 and the drafting roller 3 is about 5 to 20 times. is there.

In the above description, the mixed filament yarn after stretching is once wound up in the package and then checked by the checker. However, it is continuously wound after drawing without being wound into the package. You may turn it off.

[0020]

The reason why the method of the present invention can improve the processing stability during the draft while maintaining the random draft is not yet fully clarified, but it is estimated as follows. can do.

That is, by mixing the filament yarn to which the solid oil agent is applied and the filament yarn to which the liquid oil agent is added, the random drafting workability originally possessed by the filament yarn to which the solid oil agent is added is provided. Rolling-off roller for filament yarns with liquid oil agent that has high bundling property under low humidity while being held, and surrounding filament yarns with solid oil agent that has insufficient bundling property under low humidity It is thought that the change in focusing property due to changes in humidity is minimized. At this time, the collective check-off of the filament yarn provided with the liquid oil agent having a high bundling property is
It is suppressed by the opening force of the filament yarn provided with the solid oil agent.

As a result, it is possible to carry out a stable drafting process such that winding around the feed roller does not occur while maintaining the random drafting property even in a low humidity condition, and a spun-like processed yarn of good quality is stable. It is thought to be obtained.

The effect of the present invention cannot be obtained when the filament yarn provided with the mixed oil agent of the solid oil agent and the liquid oil agent is cut off. This point is very important in considering the action of the present invention. Seems to be.

[0024]

The present invention will be described in more detail with reference to the following examples. In addition, random drafting, feed roller winding,
The shooter breakage was evaluated according to the following criteria.

(1) Random stretch-breaking property ⊚: The spreadability is extremely good, and sufficiently random stretch-cutting is performed to obtain an extremely high-quality spun-like processed yarn. ◯: Good spreadability, random drafting is performed, and a high-quality spun-like processed yarn is obtained. X: Poor spreadability, random drafting is not performed, and a spun-like processed yarn with poor quality is obtained.

(2) Wound with feed roller ◎: Less than 0.5 times / hour of thread breakage due to winding of the feed roller ○: 0.5 times / hour or more than less than 2 times / hour of thread breakage due to winding of the feed roller X: Thread breaks due to winding of the feed roller 2 times / hour or more (3) Shooter breaks ◎: Less than 0.5 breaks / hour in the shooter section due to collective drafting ○: Breakage in the shooter section due to collective drafting 0.5 times / hour or more and less than 2 times / hour X: Thread breakage at the shooter portion due to collective drafting 2 times / hour or more

[Examples 1 to 6 and Comparative Examples 1 to 3] Polyethylene terephthalate having an intrinsic viscosity of 0.64 (containing 0.3% of TiO ₂ as a matting agent) was melted, and then the hole diameter was 0.18 mm.
Is discharged from a die having 72 pores and is cooled by side-blow cooling air, and then a 2% by weight aqueous emulsion of the following composition A is used as a solid oil agent so that the amount of the oil agent deposited becomes 0.14% by weight. Nozzle oiling method was applied, and after passing through a swirling nozzle, it was drawn 3.00 times and heat treated at 130 ° C.
It was wound up at a speed of 4000 m / min. The single filament denier of the obtained filament yarn was 2.1 de.

Further, as a liquid oil agent, 2 of the following composition of B is used.
Wt% Aqueous emulsion with 0.12 wt% oil coating
A liquid oil agent B-applied filament was obtained in the same manner as above except that the filament was applied so that Solid oil agent A Lauryl phosphate potassium salt 100% by weight Liquid oil agent B Ethylene oxide / propylene oxide copolymer (copolymerization ratio 1/1: average molecular weight 2000) 97% by weight Oleyl phosphate potassium salt 2% by weight Laurylsulfonate sodium salt 1% by weight

After the filaments to which the above-mentioned solid oil agent has been applied and the filaments to which the liquid oil agent has been applied are mixed and mixed at the ratios shown in Table 1, by the drafting device shown in FIG.
At a room temperature of 18 ° C and 18% RH, a check-off speed of 298 m / min,
The draft was cut at a draft ratio of 17.0.

On the other hand, for comparison, a filament yarn provided with only the solid oil agent of the composition A (Comparative Example 1), a filament yarn provided with only the liquid oil agent of the composition B (Comparative Example 2) and the above solid A filament yarn (Comparative Example 3) provided with an oil agent in which an oil agent and a liquid oil agent were mixed at a ratio of 3: 1 was subjected to drafting under the same conditions as in the above-mentioned Examples.

The results are shown in Table 1, and those obtained by mixing the solid oil agent-applied filament yarns and the liquid oil agent-applied filament yarns (Examples 1 to 6) gave good results even under high humidity. In particular, excellent results were obtained when the ratio of the number of filament yarns provided with the liquid oil agent was 10 to 50% (Examples 2 to 5).

On the other hand, when the solid oil agent alone (Comparative Example 1), the liquid oil agent only (Comparative Example 2) and the mixed oil agent of the solid oil agent and the liquid oil agent (Comparative Example 3) were used, random drafting property was not obtained. It was inferior, and stable check-off could not be performed.

[0033]

[Table 1]

[Examples 7 to 10] After polyethylene terephthalate having an intrinsic viscosity of 0.64 (containing 0.3% of TiO ₂ as a matting agent) was melted, pores having a pore diameter of 0.18 mm were formed.
It is discharged from a die having two pieces and cooled by side-blow cooling air, and then the solid oil agent (2% by weight aqueous emulsion) shown in Table 2 is nozzle-lubricated so that the amount of the oil agent attached becomes 0.14% by weight. After applying through the swirling nozzle,
Stretched 3.00 times and heat-treated at 130 ℃, 4000m
It was wound up at a speed of / minute. The filament yarn obtained had a single yarn denier of 2.1 de.

On the other hand, after melting the above-mentioned polyethylene terephthalate, fine holes having a hole diameter of 0.18 mm were discharged from a die unique to 72 and cooled by side-blow cooling air, and then Table 2
The liquid oil agent (2% by weight aqueous emulsion) shown in 1 is applied by the nozzle oiling method so that the amount of the oil agent attached becomes 0.03% by weight, and after passing through the swirling nozzle, it is stretched to 3.0 times and stretched 130 times. It was heat-treated at ℃ and wound up at a speed of 4000 m / min. The obtained filament yarn has a single yarn denier of 2.1.
It was de.

After mixing both filament yarns with an interlace nozzle, a drafting speed of 2 using a drafting device shown in FIG.
The draft was performed at 98 m / min and a draft ratio of 8.5.

The results are shown in Table 2, and all of them were able to carry out a stable drafting under a low humidity, and to obtain a high quality spun-like processed yarn.

[0038]

[Table 2]

The compositions of the solid oil solutions C and D and the liquid oil solutions E and F are as follows. Solid oil agent C Lauryl phosphate potassium salt 50% by weight Potassium laurate 50% by weight Solid oil agent D Stearyl phosphate potassium salt 100% by weight Liquid oil agent E oleyl oleate 60% by weight Ethylene oxide 10 mol addition nonyl alcohol 35% by weight Oleyl phosphate potassium salt 5% by weight % Liquid oil F Octyl stearate 70% by weight Ethylene oxide / propylene oxide copolymer (copolymerization ratio 1/3: average molecular weight 9000) 10% by weight Ethylene oxide 10 mol added nonyl alcohol 10% by weight Ethylene oxide 10 mol added castor oil Ether 10% by weight

[0040]

According to the present invention, since the filament yarn can be kept bundled at the time of drafting even when the humidity is low, the yarn is not wound around the feed roller or broken at the shooter portion and is stable. It is possible to perform various stretch-cutting processing, and obtain a high-quality processed yarn.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of an apparatus for carrying out the present invention.

[Explanation of symbols]

 1 Mixed filament filament yarn package 2 Feed roller 3 Checking roller 4 Air nozzle 5 Take-up roller 6 Guide 7 Winder package 8 Shooter

Claims (3)

[Claims] 1. When a plurality of filament yarns are mixed and subjected to a stretch-cutting process to produce a spun-like processed yarn, a filament yarn to which an oil agent that is solid at room temperature and absolute drying is added, and a filament-like yarn that is dried at normal temperature. A method of drafting a filament yarn, which comprises mixing a filament yarn to which an oil agent, which is a liquid, is mixed with the filament yarn and performing a drafting process. 2. The filament yarn according to claim 1, wherein the ratio of the number of single yarns of the filament yarn to which the oil agent which is liquid at room temperature is applied is 10 to 50% of the number of single yarns of all the filament yarns. Stretching method for strips. 3. The method of drafting a filament yarn according to claim 1, wherein the filament yarn is made of polyester.