JPH0680232B2 - Synthetic fiber for open-end spinning - Google Patents

Description

The present invention relates to synthetic fibers for open-end spinning, and in particular,
The present invention relates to a synthetic fiber for high-speed open-end spinning, which is suitable for high-speed open-end spinning with a rotor rotation speed of 60,000 RPM or more.

[Prior art]

The basic mechanism of the rotor-type open-end spinning consists of separating the supplied sliver with a combing roller, transferring it to the rotor chamber with an air stream, continuously accumulating it with the rotor, twisting it and drawing it out. There is.

Corresponding to such a mechanism, as an oil agent for open-end spinning, an oil agent has been researched mainly for suppressing the generation of powdery scum due to fiber cutting at the time of combing and preventing the winding of the fiber around the combing roller. . For example
52-12838 discloses an oil agent composition that suppresses the generation of powdery scum with a fatty acid ester and prevents the winding of fibers around a combing roller with a fatty acid polyamide. The composition of the oil agent that suppresses the generation of powdery scum by using the / EO block copolymer
In JP-A-57-37707, an oil agent composition that suppresses the generation of powdery scum with a POE alkyl ether or POE alkyl ester and a fatty acid ester, and prevents winding of fibers onto a combing roller with an alkyl phosphate potassium salt is disclosed. Proposed.

However, in recent years, in order to improve productivity, high-speed open-end spinning machines with a significantly high rotor speed have been adopted. In other words, the rotor speed is 30,000RP
From M, 60,000 to 80,000 RPM, early 80,000 to 1
Has reached 0,000 RPM or higher.

However, when polyester raw cotton treated with the above-mentioned open-end spinning oil was supplied to such a high-speed open-end spinning machine, the powdery scum in the rotor increased and the rotor rotation speed increased as the amount of fiber passing through increased. The spinning tension is greatly increased due to the friction with the guide, that is, the navel for pulling the yarn out of the rotor,
It was found that a part of the surface of the fiber was rubbed and plasticized. As a result, increase in thread breakage,
This will have a great adverse effect on the evenness of the yarn, the dyeing property, the yarn strength, and the like.

[Object of the Invention]

An object of the present invention is to provide a synthetic fiber suitable for high-speed open-end spinning, which improves the problems peculiar to such high-speed open-end spinning and enables high-quality spun yarn to be obtained with high efficiency.

[Structure of Invention]

As a result of intensive studies aimed at achieving the above object, the present inventors have achieved a desired fiber by increasing the oil film on the fiber surface under high speed and high tension, and by lowering the coefficient of friction against metal. .

Thus, according to the present invention, there is provided a synthetic fiber having a first coating layer made of a treating agent containing wax on the surface of the fiber, and a second coating layer made of a treating agent containing silicone oil on the surface of the first coating layer. There is provided a synthetic fiber for open-end spinning, characterized in that the first coating layer is attached at 0.10 to 0.30% by weight and the second coating layer is attached at 0.05 to 0.25% by weight based on the weight of the fiber.

Examples of the synthetic fiber in the present invention include polyester-based, polyamide-based, polyacrylonitrile-based, polyolefin-based, and polyvinyl chloride-based synthetic fibers.

In the present invention, the waxes used for the first coating layer include paraffin-based and vegetable oil-based waxes, and waxes having a melting point of 30 ° C. or higher are particularly preferable in order to exert the effect of strengthening the oil film. On the other hand, as the silicone oil used for the second coating layer, there are polysiloxane and various modified silicone oils, and among them, dimethylpolysiloxane is preferable, and in that case, in order to effectively reduce the friction against metal under high tension, 25 Particularly preferred is a high-viscosity dimethylsiloxane having a viscosity at 17 ° C. of 17 centistokes or more.

The treating agent containing these waxes and silicone oil usually oils in the form of emulsion. Therefore, as a treatment agent other than wax and silicone oil, a treatment agent satisfying emulsification, antistatic property, focusing property and smoothness is used. For this purpose, anionic, cationic, nonionic surfactants and mineral oils and fatty acid esters are usually used alone or as a mixture, but from the viewpoint of emulsion stability, polyoxyethylene alkyl ether or alkyl ester is used. Are preferably used alone or in combination.

Here, wax and silicone oil account for 30% or more and 95% (% by weight) or less, especially 40% or more and 90% or more of all active ingredients.
% Or less is desirable. In this case, the lower limit is regulated from the viewpoints of oil film strengthening and reduction of friction coefficient against metal, and the upper limit is regulated mainly from the viewpoint of antistatic ability.

The amount of treatment agent deposited on the first coating layer and the second coating layer is preferably 0.10 to 0.30% by weight for the former and 0.05 to 0.25% by weight for the latter.

For oiling, when forming the first coating layer, after a certain amount of adhesion is secured by a dipping method, drying and heat treatment are performed, and then a certain amount of adhesion is again given by a dipping method or a spray method, and then drying or heat treatment is performed. The second coating layer may be formed.

[Operation and effect of invention]

The present invention is a high speed, oil film reinforcement of the fiber surface under high tension,
At the same time, the reduction of the friction coefficient against metal was satisfied.

Therefore, by forming a first coating layer on the surface of the fiber with a treatment agent containing wax and further forming a second coating layer on the surface with a treatment agent containing silicone oil, oil film strengthening and anti-metal friction It was found that the coefficient reduction could be satisfied at the same time. That is, the first coating layer is an oil film reinforcement,
The second coating layer plays a role of lowering the coefficient of Masashi to metal.

Therefore, by using the synthetic fiber for high-speed open-end spinning of the present invention, plasticization of the fiber due to rubbing with the navel under the high-speed condition of the rotor rotation speed of 60 to 100,000 RPM and accompanying reduction in spun yarn strength and It is possible to obtain a high-quality spun yarn with extremely few dyeing abnormalities, and to suppress the accumulation of powdery scum in the rotor and the yarn breakage.

〔Example〕

Next, the present invention will be specifically described with reference to examples, but of course the present invention is not limited to these examples.

Example 1. Polyester fiber (single yarn denier 1.5 denier) in a tow state was immersed in an aqueous solution of oil A shown in the following table,
After squeezing so that the amount of applied oil agent is 0.15% by weight and drying and heat treatment with a hot roller heated to 200 ° C, it is immersed in an aqueous solution of oil agent B shown in the following table, and the amount of applied oil agent is 0.
Squeeze to 10% by weight and then crimp it at 110 ° C for 3
A hot air drying treatment was performed for 0 minutes. The raw cotton for spinning obtained by cutting this tow into a length of 35 mm was opened in the usual way, and the sliver passed through the card was passed through the kneading machine twice.
When 300 glen / 6 yard slicer was made and applied to a high-speed open-end machine, the results shown in the following table were obtained.

Here, the high-speed open-end spinning machine uses an auto roller manufactured by Shurraf Oost, and the rotation speed of the combing roller is set.
Under the conditions of 8,000RPM, rotor diameter 40mm, rotor rotation speed 80,000RPM, with a twist coefficient of 4.0, one English 16th thread (192 spindles),
Spinned for 5 hours. When yarn breakage occurred during this time, yarn joining was immediately performed, and the value obtained by converting the total number of yarn breakages per unit per hour was defined as the number of yarn breaks (threads / unit, Hr). On the other hand, the generation of powdery scum was visually judged after spinning for 5 hours, and the amount of scum in the rotor was arbitrarily selected by 20 weights. The thread strength is
The average value of 20 arbitrary weights was used for the determination, and the plasticization phenomenon on the fiber surface was determined by the following method. The spun yarn is made into a cylindrical knitted knit with a diameter of 10 cm, and samples of each level are arranged in the longitudinal direction in order.
Weave 10 cm each.

Then, the knitted knit is treated with a disperse dye (Eastman Polyeste
r Blue GLF) 1% owf for 60 minutes at 100 ° C. Then, the surface of the knitted fabric is observed with an optical microscope at a magnification of 10 to 30 times, and the number of plasticized and deeply dyed portions is counted, and the number of dark color portions per 1 m of the yarn length is used for the determination.

As is clear from the above results, the oil agent No. 1 according to the present invention exhibits extremely excellent spinnability and yarn quality.

With No.4 oil, static electricity was generated on the card, causing sliver spots due to cylinder winding, and increased thread breakage.

Example 2 In the No. 1 oil agent of Example 1, when the type and ratio of wax of A oil agent and the viscosity and ratio of silicone oil of B oil agent were changed, the results shown in Table 2 were obtained. The composition and ratio other than the changes were unchanged.

As described above, extremely good results were obtained in all cases.

Example 3 In the No. 1 oil agent of Example 1, the oil agent adhesion amount was changed to
The results in the table were obtained.

As described above, extremely good results were obtained in all cases.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takamitsu Kondo 3-4-1, Omihara, Ibaraki-shi, Osaka Inside Textile Processing Laboratory, Teijin Limited (56) Reference JP-A-55-62234 (JP, A) Kai 55-34228 (JP, A)

Claims (3)

[Claims] 1. A synthetic fiber having a first coating layer made of a treatment agent containing wax on the surface of a fiber, and a second coating layer made of a treatment agent containing silicone oil on the surface of the first coating film. The first coating layer is 0.10-0.
Synthetic fiber for open-end spinning, characterized in that 30% by weight and 0.05 to 0.25% by weight of the second coating layer are attached. 2. The synthetic fiber for open-end spinning according to claim 1, wherein the melting point of the wax is 30 ° C. or higher. 3. The synthetic fiber for open-end spinning according to claim 1, wherein the silicone oil is dimethylpolysiloxane having a viscosity at 25 ° C. of 10,000 centistokes or more.