JPH06299468A - Filament yarn for stretch-bleak processing - Google Patents

Abstract

PURPOSE:To provide filament yarn for stretch-breaking spun yarn where the filaments can be stretch-broken randomly in the stretch-breaking process and give processed yarns of good quality with scum and fluff formation reduced. CONSTITUTION:The filament yarns for stretch-breaking spun yarn to which a finishing oil consisting of more than 80% potassium alkylphosphate where the carbon number of the alkyl group is 8 to 22 and the proportion of the monoester is more than 60% is attached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filament raw yarn for drafting, which is suitable for obtaining a spunlike yarn by subjecting it to drafting. More specifically, the present invention relates to a filament raw yarn which has random drafting properties and is useful for drafting processing with less scum and cotton wool during spinning and drafting.

[0002]

2. Description of the Related Art In recent years, the draft cutting process of filaments has been carried out not only simply and at low cost to produce fibers having a spun yarn-like texture, but also by using a mixed filament yarn of different filaments as a raw yarn. Technology has been developed and developed as a method for producing a new synthetic fiber material for easily producing spun-like yarn having new texture and physical properties that have never existed before.

[0003] As the raw yarn to be subjected to such stretch-cutting processing,
In the process from spinning-drawing-winding-unwinding, maintaining the focusing property,
In the stretch-cutting process, it is required that the fiber can be easily opened while exhibiting good antistatic property. In order to satisfy such a requirement, a method of applying an oil agent which has been frequently used for spinning as it is or a slightly deformed oil agent, for example, an alkyl phosphate potassium salt and an alkyl salt having an average carbon number of the alkyl group in the range of 12 to 18 is used. The average carbon number of the group is 8
A method of applying an oil agent containing a fatty acid alkali metal salt in the range of 18 to 18 has been proposed (Japanese Patent Publication No. 1-220).
No. 64). However, according to the study by the present inventors, even if such an oil agent is liquid as an aqueous emulsion and is applied to the yarn, when the spun yarn is subjected to air pressure treatment, a part of the oil agent is not air pressure. It scatters and adheres to the yarn guides and guides around the compressed air nozzle, which is further concentrated in compressed air and adheres and deposits as a highly sticky substance or a solid scum, which hinders the running stability of the yarn. Also, in the process of winding and drafting the yarn, there is a problem that part of the oil agent component on the fiber surface falls off and adheres and accumulates as scum on the yarn guide, causing even single yarn breakage and yarn breakage. It has been found that it is necessary to reduce the amount of adhesion, and on the other hand, if the amount of adhesion is reduced, it is difficult to stably produce yarn and the occurrence of fly cotton increases.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art, and its object is to sufficiently bundle the filament raw yarn until it is wound after spinning. On the other hand, when it is subjected to stretch-cutting processing, its bundling property is easily released and it is randomly cut (check-cutting), so that it is possible to efficiently produce a processed yarn of good quality with less generation of process scum and cotton wool. An object of the present invention is to provide a filament yarn that can be stretch-cut.

[0005]

Means for Solving the Problems As a result of intensive studies for achieving the above object, the present inventors have found that conventionally used alkyl phosphate potassium salts are concentrated due to their low monoester salt content. High viscosity is apt to occur, and it was found that this is a cause of scum generation and unwinding ability, and as a result of further studies, it was concentrated even if the alkyl phosphate potassium salt contained a large amount of its monoester salt. Even if it does, the increase in viscosity is small, and since it shows a solid state at the time of absolute drying, its cohesive force is small, so that a checkered processed yarn of good quality can be efficiently produced without the occurrence of process scum. It has been found that the use of amine oxide in combination reduces scum and cotton wool even further, and thus reached the present invention.

That is, according to the present invention: An oil agent containing 80 wt% or more of an alkyl phosphate potassium salt having an alkyl group having 8 to 22 carbon atoms and a monoester content of 60 wt% or more based on the oil agent active ingredient is 0.1 to 0. 5% by weight (relative to the weight of the fiber) of the filament raw yarn for stretch-breaking processing, characterized in that it is attached. 2. The filament raw yarn for stretch-breaking processing according to claim 1, wherein the oil agent contains trialkylamine oxide in an amount of 2 to 10% by weight based on the active ingredient of the oil agent. Will be provided.

The important properties required for the oil agent used in the present invention are excellent in smoothness, bundling property and antistatic property before being wound up by a winding machine in the spinning process, while in the drafting process, the yarn Means that they can be easily opened and randomly cut. For this reason, it is important for the oil agent to maintain a solid state at room temperature and absolute dryness.However, if an ordinary alkyl phosphate potassium salt is used, as described above, the compressed air treatment in the spinning and the stretch winding are performed. In addition, scum is liable to occur in each step of the draft cutting process, which not only causes breakage of single yarns and breakage of yarns, but also increases cohesive force when the amount attached to the yarns increases, resulting in poor opening of fibers and drafting. There is a problem that the cutting processing stability is reduced.

In the present invention, in order to solve the above point, the alkyl group has 8 to 22 carbon atoms, preferably 12 to 12 carbon atoms.
18 and the oil agent containing the alkyl phosphate potassium salt having a monoester ratio of 60% by weight or more, preferably 60 to 80% by weight with respect to the oil agent active ingredient must be attached. . When the number of carbon atoms in the alkyl group is less than 8, the tackiness of the oil agent under normal temperature atmosphere increases and the cut-off processability decreases, while when it exceeds 22, the thread becomes a solid scum when concentrated, as a solid scum. It is not preferable because it is liable to adhere to and accumulate on guides and guides, which impairs the running stability of the yarn and reduces the spinnability. When the proportion of the monoester is less than 60% by weight, the content of polyphosphoric acid component is increased in view of the general method for producing alkyl phosphate (reacting alcohol with phosphorus pentoxide), and the adhesion of potassium salt of alkyl phosphate is increased. Property and cohesive force increase, which causes scum generation, unwinding property reduction, and check-cutting processability, which is not preferable.

The proportion of the alkyl phosphate potassium salt with respect to the active ingredient of the oil agent must be 80% by weight or more, preferably 90% by weight or more. Content rate is 80
If it is less than wt%, the cohesive force becomes large, the spreadability is deteriorated, and the stability of the draft cutting process is deteriorated, so that the object of the present invention cannot be achieved.

The oil agent according to the present invention described above includes
Any oil agent component within a range that does not impair the object of the present invention, for example, an alkylene oxide-added aliphatic alkyl ether-based activator obtained by adding an alkylene oxide to an alcohol such as lauryl alcohol, oleyl alcohol or other synthetic alcohol, and an alkylene oxide are added. Nonionic activator components such as ether ester activators which are reaction products of aliphatic alkylene alcohols and fatty acids, polyethylene glycol and fatty acids such as lauric acid and oleic acid,
In addition, emulsification modifiers such as fatty acids and alcohols, metal friction reducing agents such as trialkylamine oxides, and the like can be appropriately selected and used. Among them, trialkylamine oxide has a large effect of firmly adhering to the metal surface to reduce the friction between the fiber and the metal, and improves the uniform adhesion of the oil agent to the fiber surface. It is preferable because workability is also improved. When the molecular weight of the trialkylamine oxide is too small, the compatibility with the alkyl phosphate potassium salt decreases, while when it is too large, the viscosity of the oil agent tends to increase, so a linear alkyldimethylamine oxide such as dimethyllaurylamine oxide is preferable. , The addition amount is 2 to 10 with respect to the oil component active ingredient.
Weight% If it is less than 2% by weight, the effect of the amine oxide cannot be obtained. On the other hand, if it exceeds 10% by weight, the viscosity tends to increase and the stretch-cutting workability tends to deteriorate.

Next, the amount of the oil agent attached to the filament raw yarn is 0.1% by weight or more and 0.5% by weight or less, preferably 0.15% by weight or more and 0.35% by weight, based on the weight of the fiber.
Must be: When the adhesion amount is less than 0.1% by weight, it is difficult to evenly apply the oil agent and the sizing property is deteriorated, so that the single yarns are likely to be loosened and it is difficult to uniformly stretch the raw yarn during the production of the raw yarn. Therefore, problems such as defective yarn unevenness of the original yarn, single yarn breakage, or yarn breakage easily occur, which is not preferable. On the other hand, if it exceeds 0.5% by weight, the single yarns are strongly bundled and the single yarns are not sufficiently opened during the drafting process, so random cutting cannot be expected, resulting in poor quality and poor yield of the processed yarn. It is not preferable because it will cause damage.

In the present invention, the above-mentioned oil agent may be applied to the yarn in the form of an emulsion or a form dissolved in a low-viscosity diluting solvent, but an emulsion form is preferable. It is preferable in terms of productivity and operability. In addition, as the oil supply method, in addition to roller oil supply, nozzle oil supply, any known oil supply method such as a spraying method or a dipping method can be adopted.
In applying it, it is necessary to attach the oil agent as uniformly as possible.

The polymer constituting the filament yarn of the present invention is not particularly limited, and may be any of polyamide, polyester, polyacrylonitrile, aromatic polyamide and polyester. Among them, polyester is preferable from the viewpoint of feeling. Polyester here means terephthalic acid as the main acid component,
At least one glycol, particularly preferably ethylene glycol, trimethylene glycol, refers to those having a main glycol component alkylene glycol selected from tetramethylene glycol, specifically, polyethylene terephthalate, polybutylene terephthalate, etc.,
Or these polyesters with a little isophthalic acid,
A copolyester obtained by copolymerizing 5-sodium sulfoisophthalic acid and the like can be mentioned. Also, a mixture of these various polymers may be used. These polyesters may be added with commonly used additives such as matting agents, stabilizers, antistatic agents and the like.

[0014]

In the conventional drafting yarn, a small amount of an oil agent, which has been widely used for spinning, is often used. However, the conventionally proposed oil agent has a high cohesive force even though it exhibits a solid state when completely dried, and therefore, in order to improve the fiber openability at the time of draft cutting, it is necessary to extremely reduce the amount of adhesion thereof. Inevitably, it is inferior in terms of yarn formability. Of course, if the applied amount is increased, the aspect of this silk-forming property is improved, but before the spin-forming property is improved to a sufficient level, the cut-off processability is reduced, and part of the oil agent component falls off. Accumulated as scum, causing yarn breakage.

The present invention overcomes such disadvantages, satisfies the sizing property to the extent that the process condition during spinning can be favorably maintained, and allows the yarn to be sufficiently opened and random at the time of the drafting process. It is possible to obtain a textured yarn that is cut into pieces and has a good quality with less generation of scum and cotton wool in the process.

The reason why such a characteristic effect is exhibited has not been completely clarified yet, but it is presumed as follows. That is, since the alkyl phosphate potassium salt compounded in the oil agent added to the yarn of the present invention has a monoester ratio of 60% by weight or more, it shows a solid state in an absolutely dry state, but its aggregation. Since the force is not so large, even if an oiling agent is added until the filament raw yarn is manufactured, the single yarn is sufficiently opened during the check-cutting process, and the check-out stress for each single yarn is increased. Since the loads can be applied independently, the quality is good but the textured yarn can be obtained stably. Also, since the oil agent does not increase in viscosity even when concentrated,
The scum is not accumulated on the guides and the like, and the process condition in each of the yarn making process and the drafting process is also improved. Especially when a trialkylamine oxide is used together, not only the uniform adhesion to the fiber surface is improved, but also the amine oxide is strongly adhered to the surface of the guide, heater, etc., and the friction between the fiber and metal is also reduced. Therefore, the occurrence of scum is further reduced.

Hereinafter, the present invention will be described in more detail with reference to examples.

[0018]

Example After melting polyethylene terephthalate having an intrinsic viscosity of 0.64 (containing 0.3% by weight of TiO ₂ as a matting agent), a hole diameter of 0.18 mm and 80 holes and a hole diameter of 0.39.
It was discharged from the same die having 4 mmφ holes. After the discharged filament is cooled by the side blowing cooling air,
The oil agent composition shown in Table 1 below was nozzle-oiled in the form of an aqueous emulsion having a concentration of 2% by weight so that the amount of adhesion shown in Table 2 or Table 3 was obtained. Then, after passing through the swirling flow pressure air nozzle,
Stretched 1.33 times, heat treated at 120 ° C, 4000m
It was wound at a speed of / minute. The wound yarn is 0.48dex
The number was 80 and 4.0 de × 4.

This raw yarn was applied to the drafting machine shown in FIG. 1 to carry out drafting. That is, after the paper was cut off between the feed roller 2 and the cut-off roller 3, it was tied up by the air nozzle 4, passed through the take-up roller 5 and the guide 6, and taken up by the winder. The obtained results are shown in Tables 2 and 3.

[0020]

[Table 1]

[0021]

[Table 2]

[0022]

[Table 3]

Here, OPU represents the amount of the oil agent composition attached, and each evaluation item was in accordance with Table 4.

[0024]

[Table 4]

From the results shown in Tables 2 and 3, the filament raw yarn of the present invention has random drafting property, less scum during spinning and processing, and less amount of fly cotton during processing. It is clear that the material has extremely excellent properties for use in drafting.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a process of draft cutting a raw yarn in an example.

[Explanation of symbols]

 1 filament raw yarn package 2 feed roller 3 drafting roller 4 air nozzle 5 take-up roller 6 yarn guide roller 7 drafting processing package

Claims (2)

[Claims] 1. An oil agent containing 80 wt% or more of an alkyl phosphate potassium salt having an alkyl group having 8 to 22 carbon atoms and a monoester content of 60 wt% or more based on the oil agent active ingredient is 0. 1 to 0.5% by weight (relative to the weight of the fiber) of the filament yarn for stretch-breaking processing, characterized in that it is attached. 2. The oil agent contains trialkylamine oxide in an amount of 2 to 10% by weight based on the active ingredient of the oil agent.
The filament raw yarn for stretch-cutting processing described.