JPS638234B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a fiber processing agent for spinning yarn used when spinning thermoplastic synthetic fibers.
More specifically, the present invention relates to a fiber treatment agent for false-twisted yarn that can prevent troubles such as heater staining during false-twisting and can impart good antistatic properties to the yarn. [Prior Art] In the spinning process for producing thermoplastic synthetic fibers to be subjected to false twisting, a fiber treatment agent is applied to impart smoothness, antistatic properties, etc. to the fibers. This fiber treatment agent contains at least a smoothing agent and an antistatic agent. In the case of fibers that are applied with a fiber treatment agent and run in contact with the heater, such as fibers for false twisted yarn, a component that remains on the heater and does not turn into sludge is suitable as the fiber treatment agent. As a type of smoothing agent component that is difficult to form sludge, there is a polyether compound disclosed in US Pat. No. 3,338,830, and this polyether compound is widely used. However, since the antistatic properties of this polyether compound alone are insufficient, it has actually been used as a fiber treatment agent to which other components such as antistatic agents are added. As the antistatic agent, phosphoric acid ester salts of higher alcohols or alkylimidazolines are generally used. These antistatic agent components are all compounds that have little loss on heating, so like the polyether compounds mentioned above,
When used in combination with a smoothing agent component that has good thermal decomposition properties and is difficult to form into a sludge, only these antistatic agent components remain on the heater and form a sludge. The sludge thus formed was white in the case of the phosphoric acid ester salt and adhered in a band shape along the yarn path. These slugs cause problems with yarn running and reduce the efficiency of yarn heating, and especially when false twisting fine denier yarns, they often cause the yarn to sway on the heater and break. The heater had to be cleaned frequently to remove sludge. On the other hand, the fabrication of women's seamless socks, which is the main use for synthetic fiber crimped yarns, has progressed significantly, and as a result, false-twisted fibers are becoming increasingly finer in denier. More and more countermeasures are being required. [Problems to be Solved by the Invention] The present invention provides a fiber for spinning that can significantly suppress the formation of sludge on the heater during post-processing, and that can be easily removed even if dirt is attached. Its main purpose is to provide processing agents. [Means for Solving the Problems] In order to achieve the above object, the present invention provides an antistatic agent used as a component of a fiber treatment agent for yarn spinning.
It consists of using one or more compounds represented by the following general formulas (1) and (2). (However, R is an alkyl group having 8 to 13 carbon atoms, n is an integer of 1 to 10, and M is Na or K, respectively.) [Action] Compounds shown in (1) and (2) above (hereinafter, Alkylphenol type phosphates (called alkylphenol type phosphates) have excellent heat resistance, so they do not turn into sludge even if they remain on the heater. Potassium phosphate salt of octylphenol (EO) (abbreviated as _potassium triphosphate). Similarly, the n-mole adduct of ethylene oxide is abbreviated as (EO) _o ], nonylphenol (EO) _triphosphate sodium salt, nonylphenol (EO) _{tetraphosphate} potassium salt, dodecylphenol (EO) _triphosphate Potassium salt, tridecylphenol (EO) _5- phosphate sodium salt, etc. These compounds may be those represented by the structural formula of formula (1) above, or may be those represented by the structural formula of formula (2) above, or may be those represented by the structural formula of formula (1) above. It may be a mixture of the compound of the formula and the compound of the formula (2) above. The amount of this alkylphenol type phosphate to be blended may be about 1 to 7% by weight, more preferably 3 to 5% by weight, based on the active ingredients in the processing agent.
If this amount is too large, a large amount remains on the heater, and this residual liquid tends to cause yarn sway, which is not preferable. On the other hand, if the amount is too small, it is difficult to obtain a sufficient antistatic effect. This alkylphenol type phosphate contributes as an antistatic agent, but the charging performance will vary depending on the type of smoothing agent used, so an antistatic aid such as an alkyl sulfonate compound should be used at a concentration of 1% by weight. May be used together as a limit. As the smoothing agent used in combination with the alkylphenol type phosphate, a compound with good thermal decomposition or thermal volatility is preferable from the viewpoint of preventing sludge formation on the heater. As the smoothing agent, for example, a polyether smoothing agent, an ether ester smoothing agent, an ester of a monohydric alcohol and a monobasic fatty acid, a mineral oil having a redundant viscosity of 40 to 60 seconds, etc. are used. Among the polyether smoothing agents mentioned above, one of random or block copolymers having a copolymerization ratio of propylene oxide and ethylene oxide of 90/10 to 30/70 and an average molecular weight of 300 to 20,000, or two of these A smoothing agent formed by mixing more than one species is preferred. Further, as the ether ester smoothing agent, butyl alcohol (EO) ₃ propionate,
Examples include lauryl alcohol (EO) _3- decanoate, lauryl alcohol (EO) _3- octanoate, and stearyl alcohol (EO) _2- laurate. Further, as the esters of monohydric alcohol and monobasic fatty acid mentioned above, octyl laurate, isooctylelaurate, lauryl laurate, isooctyl myristylate, isopropyl palmitate, normal octyl palmitate,
Examples include isopropyl stearate and isooctyl stearate. In addition, when using the fatty acid ester type smoothing agent or mineral oil, a nonionic emulsifier may be used together as the emulsifier. The blending amount of these smoothing agents may be about 30 to 96% by weight based on the active ingredients in the processing agent. In addition to the above-described smoothing agent and alkylphenol type phosphate, the fiber treatment agent according to the present invention may contain a small amount of other additives depending on the intended use, such as an antioxidant. Further, the treatment agent of the present invention is preferably applied as a water emulsion type oil agent during the manufacturing process of synthetic fibers such as polyamide fibers, but it may be applied as an oil agent diluted with a solvent other than water to adjust the viscosity. Good too. The oiling means may be an oiling roller method or a guide oiling method. [Effects of the Invention] The synthetic fibers produced using the fiber treatment agent of the present invention do not form sludge on the heater even when subjected to post-processing such as false twisting, and moreover, they do not cause stains on the heater. Even if it sticks, it can be easily removed. In other words, the fiber treatment agent according to the present invention has a great effect on suppressing stains on the heater during post-processing, and since even a small amount of stain attached to the heater does not turn into sludge, the fiber treatment agent on the heater does not become sludge. It is unlikely to cause shaking or thread breakage. Therefore, even when applied to fine denier yarn for false twisting,
It does not cause troubles such as yarn shaking or yarn breakage during false twisting. Furthermore, cleaning on the heater becomes easier and the cleaning cycle can be extended. [Example] Example (and Comparative Example) 1 Undrawn nylon 66 yarn melt-spun in a conventional manner was coated with water at a concentration of 5% by weight having the composition shown in Table 1 (each component is shown in parts by weight). The emulsion type oil was oiled and then stretched to 30 denier.
A drawn yarn with 10 filaments and an oil coating amount of 0.5% by weight was obtained. The obtained yarn was processed at a yarn speed of 600 m/min using a circumscribed 3-axis friction processing machine consisting of 9 metal disks.
Heater length 2m, heater temperature 205℃, stretch rate
False twisting was performed under the conditions of 7.0% and yarn speed ratio of 2.10. The staining of the heater during false twisting, the degree of difficulty in cleaning the heater, and the degree of yarn breakage were measured using the following methods, and the results are shown in Table 1. ●Condition of heater: The surface condition of the heater was determined visually after approximately 100 hours of processing. 〇: Almost no deposits △: White deposits are loosely adhered ×: White deposits are clearly visible●Level of difficulty in cleaning the heater: After determining that the heater is dirty, clean the heater groove with a glass fiber. It was cleaned and judged based on the number of times it was rubbed. ○: Items that fall off after being rubbed 2 to 3 times ×: Items that require strong pressure bonding 4 or more times and rubbing and cleaning ●Year breakage rate: The number of thread breakages per 20 kg of processed yarn was measured. - Yarn breakage rate: This is the yarn breakage rate when processing 5 to 6 tons of processed yarn, and was determined according to the following criteria. 〇: Yarn breakage rate less than 5% △:〃 5% to less than 8% ×: 8% or more In the case of Nos. 1 to 5 using the fiber treatment agent according to the present invention, there was less dirt adhering to the heater. , the heater is easy to clean, and there are fewer thread breaks.
It had good workability. On the other hand, No. 6 using a fiber treatment agent other than the present invention
In the case of No. 7 and No. 8, there was a lot of dirt on the heater, which was difficult to remove, and there were many thread breaks during processing.

[Table] Example (and Comparative Example) 2 Each component of the antistatic agent used in the present invention, a conventional antistatic agent other than the present invention, and a smoothing agent preferably used in the present invention was subjected to static heating. The results are shown in Table 2. ●Static heating method: Place 3g of sample in a small metal plate and heat to 220℃.
Heat for 24 hours in a dryer maintained at . Thereafter, it was cooled and weighed, and the weight loss upon heating was expressed as a heating weight loss rate in %. In addition, the state after heating was observed with the naked eye. As can be seen from the results in Table 2, the antistatic agent component used in the present invention had good heat resistance and did not form a sludge. On the other hand, antistatic agent components other than those of the present invention were formed into sludge. In addition, all of the smoothing agent components listed in Table 2 have good thermal decomposition properties and are volatilized by heating, leaving almost no residue, so they are excellent in preventing stains on the heater.

【table】

Claims (1)

[Scope of Claims] 1. A fiber processing agent for spinning yarn comprising at least a smoothing agent and an antistatic agent, wherein the antistatic agent is one or more of the compounds represented by the following general formulas (1) and (2). A fiber processing agent for silk spinning characterized by using the following. (However, R represents an alkyl group having 8 to 13 carbon atoms, n represents an integer of 1 to 10, and M represents Na or K, respectively.)