JPH05287619A - Filament yarn for stretch-breaking spinning - Google Patents

Abstract

(57) [Summary] [Purpose] A single yarn can be randomly drawn at the time of the drafting process, and the fabric can be obtained with good quality during post-processing such as twisting, weaving, dyeing, etc. To provide a filament raw yarn for processing. [Structure] An oil agent composition containing a mineral oil having a redwood viscosity of 100 seconds or less as a main component and having an adhesive force of 100 g / cm ² or less and which is liquid at room temperature and absolute dryness is used in an amount of 0.05 to 0.5% by weight. Attached filament yarn for stretch-cutting processing. [Effect] As the main component is mineral oil of a specific viscosity, the openness of the single yarn is good and the random drafting is performed during the drafting process without deteriorating the processability such as twisting, weaving and dyeing. Is possible.

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, it has a random drafting property and is less likely to cause scum during spinning, drafting, twisting, and weaving, and has less dyed spots during dyeing, and is useful as a drafting process that does not require Corning oil. Filament raw yarn.

[0002]

2. Description of the Related Art In recent years, the stretch-cutting process of filaments has been carried out not only by simply producing fibers having a spun yarn texture at low cost, but also by using a mixed filament yarn of different filaments as a raw yarn. Technology has been developed and deployed as a new synthetic fiber material manufacturing method for easily manufacturing spun-like yarns with new textures and physical properties not found in the market.

[0003] As a raw yarn to be subjected to such stretch-cutting processing,
In the process from spinning-drawing-winding-unwinding, maintaining the bundling property,
In the drafting 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 widely used for spinning as it is or an oil agent which is slightly deformed, for example, an alkyl phosphate potassium salt and an alkyl group having an alkyl group having an average carbon number of 12 to 18 are used. The average carbon number of the group is 8
A method of applying an oil agent containing an aliphatic alkali metal salt in the range of 18 to 18 has been proposed (Japanese Patent Publication No. 1-220-202).
No. 64). However, according to the studies by the present inventors, such an oily agent exhibits a solid state at the time of absolute drying, and has high cohesive force but also high brittleness. Therefore, in order to satisfy the bundling property and the unwinding property at the same time, It is necessary to make the applied amount extremely small, and since this proper applied amount is a small amount compared to the applied amount of the oil agent that is usually applied during filament raw yarn production, stable spinning is considerably difficult, etc. There was found. Further, some of the same oils absorb moisture under normal temperature and normal humidity to increase the tackiness, resulting in a decrease in unwinding property.
Also, since the oil component is solid, even if the yarn is lubricated in a liquid form as an aqueous emulsion, if the spun yarn is to be subjected to pressure treatment, part of the oil will scatter in pressure and It adheres to the yarn guides and guides around the nozzle, which is further concentrated in the compressed air and adheres and deposits as a highly adhesive substance or a solid scum, which impairs the running stability of the yarn. Alternatively, there is a problem that in the process of winding and drafting the yarn, a part of the oil agent component on the fiber surface drops off and adheres and accumulates as scum on the yarn guiding guide, causing even single yarn breakage and yarn breakage. Was also found.

Further, there has been a problem that it is necessary to add a smoothing agent mainly composed of mineral oil called post-processing Corning oil so that the post-processing step can smoothly pass through.

[0005]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the problems of the above-mentioned prior art, in which the filament raw yarn is sufficiently bundled until it is wound up after spinning, while the draft cutting is performed. When processed, the bundling property is easily released and randomly cut (drafting), and it is possible to efficiently produce processed yarn of good quality without generating scum in the process. When weaving and weaving using the processed yarn, it is possible to pass the process in a stable manner without the accumulation of yarn-guided scum and fluffing, and without the need for Corning oil. An object of the present invention is to provide a stretch-cutting processed yarn which has good adhesion and has less dyeing unevenness during dyeing.

[0006]

Means for Solving the Problems As a result of intensive studies for achieving the above-mentioned object, the present inventors have found that even if an oil agent which is liquid at room temperature and absolute dryness, an oil agent having specific characteristics is cut off. It was found that a good spun-like yarn can be obtained without impairing the processability, and as a result of further studies, it was found that by using a specific mineral oil as a main component, it was not necessary to add Corning oil, and weaving The inventors arrived at the present invention by knowing that the properties and stains are also good.

That is, according to the present invention, an oil agent composition which is a liquid at room temperature and absolutely dry and which contains a mineral oil having a redwood viscosity of 100 seconds or less as a main component and an adhesive force of 100 g / cm ² or less is added to a fiber weight. On the other hand, it is a filament raw yarn for stretch-breaking processing which is adhered by 0.05 to 0.5% by weight.

The oil agent composition used in the present invention is required to maintain a liquid state under normal temperature and absolute dry conditions. If it is solid, as described above, during the air pressure treatment during spinning, during the drawing, winding and draft cutting processes, some of the agent on the fiber surface falls off and adheres to the yarn guide as scum. Not only is it a cause of pile-up and breakage of single yarn and breakage of yarn, but if the amount attached to the yarn is too large, the cohesive force will be large, resulting in poor opening, and the check-cut process cannot be performed smoothly. You'll be out of tune. Further, even when the paste-like or gum-like form is exhibited, not only the same scum trouble as described above occurs, but also the friction between the yarn and the yarn guiding guide during traveling becomes large, so that the process stability is lowered. However, it is not preferable because the quality of the obtained yarn is deteriorated.

The main component of the above oil agent composition is
It is important to use a low viscosity mineral oil with a redwood viscosity of 100 seconds or less. Here, if it exceeds 100 seconds, the viscosity is too high and the binding force between the single yarns becomes too large, so that it is difficult for the yarn to be opened during the stretch-cutting process, and the quality of the obtained processed yarn deteriorates. On the other hand, when the other component, for example, a dimethyl silicone-based or fatty acid ester-based smoothing agent as a main component, the process tone during the yarn making and draft cutting process is good, and a finished yarn of good quality is obtained. When subjected to post-processing such as twisted yarn and knitting and weaving, unless Corning oil is applied, the process passability is deteriorated, and only the product with deteriorated quality is obtained, which is not preferable. There is also a problem that when sizing is applied during weaving, the sizing tends to come off and the weaving process deteriorates, and especially when dimethyl silicone is used in combination, stains are likely to occur during dyeing. ..

Further, in the present invention, it is important that the adhesive force of the oil agent composition measured by the following method is 100 g / cm ² or less, preferably 50 g / cm ² or less. When the adhesive strength exceeds 100 g / cm ² , the bundle-forming property is good and the yarn-forming property up to the production of the filament raw yarn is good, but the binding force between the single yarns / single yarns becomes too large.
Since it is difficult to open the fiber during the drafting process, multiple single yarns are likely to be cut at a time, and as a result, the quality of the resulting processed yarn decreases, and in extreme cases, the yarn breaks and the yield decreases. Not preferable.

Measurement of adhesive strength 12.5 g of an aqueous emulsion oil composition having a concentration of 2% by weight
Is collected in a glass petri dish having a diameter of 90 mm, air-dried for 24 hours and further dried at 105 ° C. for 2 hours. Then 2
A sample for measurement is prepared by controlling the humidity for 4 days in an atmosphere of 0 ° C. and 65% RH. A 25 g weight, which is obtained by adhering a polyester film having an area of 2.27 cm ² to the bottom of the same area, is placed on the above sample, further weighted so that the total load will be 100 g, and placed for 1 minute. This load was removed, and then the 25 g weight was pulled up at a speed of 75 mm / min. The value obtained by subtracting 25 g from the maximum pulling tension at this time and dividing by the area was taken as the adhesive strength.

As described above, the oil agent composition according to the present invention contains a low-viscosity mineral oil as a main component, preferably 65-
Although it contains 80% by weight (based on the oil agent composition), any emulsifier component can be used in combination as long as it is in a liquid state and satisfies the requirements of adhesive strength. For example,
Lauryl alcohol, oleyl alcohol and other synthetic alcohols and other alcohols such as alkylene oxide-added aliphatic alkyl ether activators, alkylene oxide-added aliphatic alkylene alcohol and fatty acid reaction products, polyethylene glycol and lauric acid and 20 to 30% by weight of one or more nonionic activator components such as ether ester activators, which are reaction products with fatty acids such as oleic acid, can be added. In addition, anionic activators such as phosphates, sulfonates, and sulfates, cationic activators, emulsification modifiers such as fatty acids and alcohols, and the like can be appropriately selected and used.

Next, the amount of the oil agent composition deposited on the filament raw yarn is 0.05% by weight or more and 0.5% by weight or less, preferably 0.10% by weight or more and 0.
It should be 35% by weight or less. When the adhesion amount is less than 0.05% by weight, it is difficult to uniformly apply the oil agent composition and the sizing property is deteriorated, so that the single yarns are likely to be loosened and uniformly drawn during the production of the raw yarn. Becomes difficult, and troubles 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, when the content 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, in order to apply the above-mentioned oil agent composition to the yarn, it may be applied in any form of emulsion, straight or dissolved in a low-viscosity diluting solvent. Is preferable in terms of handleability and operability. In this case, it is desirable that the water viscosity is 100,000 centipoise (cp) or less, preferably 10,000 cp or less. When the fluidity exceeds 100,000 cp and the fluidity is lost, the oil agent composition tends to be deposited around the compressed air nozzle when the compressed air treatment is performed, thereby hindering stable running of the yarn. Further, as the oil supply method, any known oil supply method such as roller oil supply, nozzle oil supply, spraying method, dipping method, etc. can be adopted, and it is necessary to apply the oil agent as uniformly as possible when applying the oil supply method.

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.
The polyester as referred to herein is one having terephthalic acid as a main acid component and at least one glycol, particularly preferably ethylene glycol, trimethylene glycol, or an alkylene glycol selected from tetramethylene glycol as a main glycol component, Specific examples thereof include polyethylene terephthalate, polybutylene terephthalate, and the like, or copolymerized polyesters obtained by copolymerizing these polyesters with a small amount of isophthalic acid, 5-sodium sulfoisophthalic acid, and the like. Also,
It may be a mixture of these various polymers. These polyesters may be added with additives such as matting agents, stabilizers, antistatic agents and the like which are usually used.

[0016]

As a raw yarn for drafting, a small amount of an oil agent, which has been widely used for spinning, is often used. However, since such an oil agent is solid and has a high cohesive force at the time of absolutely dryness, it is necessary to extremely reduce the adhered amount of the oil agent in order to improve the fiber openability at the time of the draft cutting process. You cannot avoid being inferior. Of course, if the added 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 decreases and part of the oil agent component falls off. Accumulated as scum, causing thread 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 yarns to be sufficiently opened and random during the drafting process. Thus, the processed yarn of good quality can be stably obtained. In addition, the obtained processed yarn has a feature that it can be stably post-processed without causing troubles in the twisting process and the weaving / knitting process without applying the Corning oil which has been conventionally required. Further, when the obtained yarn is sewn and woven, the adhesiveness of the sizing is good, the weaving property does not deteriorate, and even when the obtained fabric is dyed, a silicone-based smoothing agent is not used in combination. Therefore, it has a feature that stain spots are less likely to occur.

The reason why such a characteristic effect is exerted has not been completely clarified yet, but it is presumed as follows. That is, the oil agent composition applied to the yarn of the present invention is mainly composed of low-viscosity mineral oil and has an adhesive force of 100 g / cm.
^Since it exhibits a liquid state of ² , it has sufficient focusing and smoothness in the stage up to filament filament production, and can be stably spin-stretched.
Since the binding force between the single yarns is not large, the fibers can be easily opened, and the check stress can be independently applied to each single yarn. It is considered that the quality is extremely improved. Moreover, since the main component is mineral oil, it is considered that sufficient smoothness is exhibited even if no Corning oil (usually mineral oil) is added. Furthermore, since the oil agent composition is in a liquid state, the oil agent composition does not deposit on the guide as a solid scum even when the traveling yarn is rubbed against the thread guides and the like. The process condition in is also improved.

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

[0020]

[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 a diameter of 80 holes and a hole diameter of 0.39 mm
It was discharged from the same die having 4 holes of φ. The discharged filament was cooled by side-blow cooling air, and then the oil agent composition shown in Table 1 below was nozzle-lubricated in the form of an aqueous emulsion having a concentration of 3% by weight so as to have the adhesion amount shown in Table 2.
Then, after passing through a swirling flow pressure air nozzle, it was drawn 1.33 times, heat-treated at 120 ° C., and wound at a speed of 4000 m / min. The wound yarn is 0.48 de x 80 threads, 4.0
It was 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 bound 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.

[0022]

[Table 1]

[0023]

[Table 2]

[0024]

[Table 3]

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

[0026]

[Table 4]

From the results shown in Tables 2 and 3, the filament raw yarn of the present invention has a random drafting property and less scum during spinning, processing, twisting and weaving.
It is clear that it has extremely excellent properties for use in drafting and does not require after oil.

[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 (1)

[Claims] 1. An oil agent composition which is a liquid at room temperature and absolutely dry and which contains a mineral oil having a redwood viscosity of 100 seconds or less as a main component and an adhesive force of 100 g / cm ² or less, based on the fiber weight. 0.05 to 0.5% by weight of the filament raw yarn for stretch-breaking processing.