JPS6119874A - Oil agent for thermoplastic synthetic fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a lubricant for thermoplastic synthetic fibers.

In more detail, we will introduce an oil agent that provides stable operability in the production and processing of thermoplastic synthetic fibers, especially for fine denier textured yarn for socks (100 deniers or less) produced using the friction false twisting process. This invention relates to an oil agent suitable for production.

[Conventional technology]

The lubricant for processed yarn used in the production of processed yarn using a friction false twisting machine capable of high-speed processing has traditionally been required to have anti-tar properties and high twistability. Bisphenol derivatives shown in Publication No. 47-29474 and polyethers shown in U.S. Patent No. 8,888,880 are widely used, but although these components have very good heat resistance, It also has a high viscosity and is characterized by a high coefficient of friction.

However, in recent friction-type false twisting machines, it is not necessarily necessary to maintain a high level of twistability by devising the number of disk shapes, but rather, it is not necessary to maintain a high level of twistability due to the high viscosity of the oil and high coefficient of friction. Yarn breakage and processed yarn breakage are becoming major obstacles. In particular, in the field of women's socks, which is the main use of polyamide fibers, there has been a noticeable trend toward finer deniers as socks become more fashionable. Due to the stickiness of the oil deposited on the 1&roll and guide, thread breakage increases and thread threading workability is significantly reduced.

In addition, in friction-type false twisting machines, the yarn surface is scraped off due to the contact pressure between the yarn, the processing machine guide, and the rotating disk, producing white powder, which is mixed with oil and becomes a highly viscous scum. It accumulates on the disk surface, leading to the occurrence of machining caps and an increase in yarn breakage.Furthermore, when the yarn breaks, the white powder accumulated on the disk becomes an obstacle, making it difficult to thread the yarn, which is a major hindrance to machining operation. Ta.

[Problem that the invention seeks to solve]

The present invention achieves stable operability in the production of raw yarn and processed yarn, and produces false-twisted yarn with a low quality yarn. We aim to provide all possible oils.

[Means for solving all problems and their effects] The object of the present invention is to solve the following problems: A General formula R'(OC2H4)ffl (OC3H6
)y1□ A polyether represented by H, R
is hydrogen or an alkyl group having 1 to 18 carbon atoms, and the ratio of the molecular weights of polypropylene oxide and polyethylene oxide is determined. ~5015o, and the total molecular weight is 30
0-2500 polyether 250-70 parts by weight B An ester of an alcohol having 3 to 18 carbon atoms and a fat III having 2 to 12 carbon atoms, with ethylene oxide and/or propylene oxide added to the alcohol residue, The main component of the oil agent is 80-95 parts by weight of the total weight of the oil agent, which consists of 230-50 parts by weight of ether ester whose total molecular weight is less than 500, and the viscosity is 30-150 parts by weight at 30°C.
This was achieved using Centivoice, an oil for thermoplastic synthetic fibers.

The polyether used as component A of the present invention is a relatively low viscosity polyether, for example, ]lc%. (
4% o) Random 2000 (This polyether is a random copolymer of 40:60 (hereinafter abbreviated as 4%0) of ethylene oxide (hereinafter abbreviated as EO) and propylene oxide (hereinafter abbreviated as PO) and has a molecular weight of 2000. It means polyether. The same shall apply hereinafter. However, below, the term "block" means a block copolymer.]
Butyl alcohol 19/P. (4 (4o) random 14
00, octyl alcohol EO/P. (5% o) Random 1400, inoctyl alcohol EO/P. (2%
5) Block 1700, lauryl alcohol /P.

(5915o) Random 700, lauryl alcohol 1
% (4% o) block 1600, stearyl alcohol 0% (5% 0) random 1200, trimethylolpropane F'. /P. (807, o) Random 2000
Examples include.

In the polyether which is component A of the present invention, it is necessary that the molecular weight ratio of polypropylene oxide and polyethylene oxide is 9 (/1o to 5o15o), and the richer the polyethylene oxide, the higher the viscosity. , which is not preferable because it tends to turn into tar.

Moreover, if this ratio exceeds 99/Lo and the polypropylene oxide becomes rich, the emulsifying property becomes poor, which is not preferable.

Further, as an example of the ether ester which is component B of the present invention, butyl alcohol (KO) 3 propionate [this compound means a compound in which three molecules of ethylene oxide are added to a butyl group.

The same applies hereinafter], butyl alcohol EO2P03 caprylate, inoctyl alcohol EO2P02 caprylate, lauryl alcohol (Eo) 2 octanoate, lauryl alcohol (KO) 3 decanoate, lauryl narcol (] 1 cO) 2 laurate, lauryl alcohol (EO) )3 adipate, stearyl alcohol (UO, )2 laurate, and the like.

The total molecule M of the ether-forming ester, which is component B of the present invention, must be 500 or less. This is because a viscosity of 500 or less is appropriate and has excellent lubricity. Furthermore, the ether ester of the present invention generates less smoke during heat treatment than ordinary fatty acid esters, and has excellent thermal decomposition properties.

In the present invention, the proportions of both components A and B affect the viscosity of the blended oil. If the ratio of component A is high, the viscosity will increase, which may affect workability, and if the ratio of component B is high, the tackiness will decrease, but the coefficient of friction will be too low, resulting in poor twistability. As a result, the elasticity recovery rate of the processed yarn decreases, which poses a problem.

As a result, the viscosity of the blended oil was 30 to 15 at 80°C.
0tz Nayano ° It is necessary to fake, preferably 50 to 1
20 and 7 fs between each other.

It is preferable to add 3 to 10% by weight of a phosphate antistatic agent, which is generally used as an antistatic agent, to the oil agent according to the present invention. Further, depending on the purpose, a small amount of antioxidant may be added.

Further, the oil according to the present invention can be used without any problem for oiling by a guide oiling method as well as oiling by a commonly used oiling roller method.

[Actual example]

Next, the present invention will be explained in more detail based on examples.

Examples and Comparative Examples Polycapramide of ηr255 was fed to a normal melt spinning machine and melt-spun at 265°C. In this case, after applying D-G (comparative example) with a normal oil roller, it was taken off at a take-up speed of 4,200%, and subsequently rotated at a peripheral speed faster than this take-up reroller. After the yarn was stretched 107 times with a stretching roller, it was rolled up into one wine goo to obtain a drawn yarn of 17 denier and 5 filaments.

This thread has a total diameter of 50mm and a thickness of 7U urethane disk 6
Yarn speed 600% with a circumscribed type 7 riction processing machine consisting of
The yarn was drawn at an o1 heater temperature of 170° C., a heater length of 1 m, and a stretch rate of 20% to produce a processed yarn of 14 denier and 5 filaments. Table 1 shows the raw yarn production operability and processed yarn production operability for each blended oil side split at this time.

In addition, in this example, viscosity and stretchability.

The coefficient of friction against metal, disk scum during machining, thread breakage and yarn hooking success rate were measured by the following methods.

(1) Viscosity Using a rotational viscometer manufactured by Tokyo Keiki Co., Ltd., measure 20% of the sample.
- It was taken and measured under the condition of 3°C ± 0.1°C.

(2) Stretchability After continuous operation for 10 days, the yarn breakage rate was evaluated as follows.

○: Thread breakage rate 006 times/day, less than △: Thread breakage rate
006 to 012 times/day/Rokin ×: Thread breakage rate 012 times/
(3) Friction coefficient against metal: Human tension when running in contact with a draw pin with a matte surface finish of 13 mm in diameter at a contact angle of 180°C at a thread speed of 800'4+l per minute.

The traveling force was measured and converted into a coefficient of friction.

(4) Disc scum Continuous processing was performed for 100 hours, and the following judgments were made based on the state of white powder adhesion on the disc.

○: Slightly adhered Δ: Slightly adhered ×: Significantly adhered (5) Yarn breakage The number of yarn breakages per gram of processed yarn is 25 when processed continuously for 100 hours. I judged it.

○: Number of thread breaks: 3 times or less △: Number of thread breaks: 4 to 5 times ×: Number of thread breaks: 6 times or more I judged it by doing it.

○: Threading success rate 90% or more △: Threading success rate 70-80% ×: Threading success rate 60% or less Compounded oil B (invention) Compounded oil C (invention) Compounded oil D (Comparative Example 2A) When the ratio of components is low) Compounded oil agent E (Comparative example: When the ratio of component A is high) Compounded oil agent F (
Comparative example) Compounded oil agent G (comparative example) [Effects of the invention] According to the thermoplastic synthetic U & miscellaneous oil agent according to the present invention, excellent drawability can be imparted to the yarn at the yarn manufacturing stage, and t It is possible to suppress inconveniences such as disk scum and yarn breakage during the fabricated yarn production stage, and excellent yarn hooking can impart properties.

Claims (1)

[Claims] A General formula R(OC_2H_4)_m(OC_3H_6
)_n-H, R is hydrogen or an alkyl group having 1 to 18 carbon atoms, the molecular weight ratio of polypropylene oxide to polyethylene oxide is 90/10 to 50/50, and the total molecular weight is 30
0-2500 polyether: 50-70 parts by weight B An ester of an alcohol having 3 to 18 carbon atoms and a fatty acid having 2 to 12 carbon atoms, with ethylene oxide and/or propylene oxide added to the alcohol residue, The main component of the oil agent is ether ester whose total molecular weight is less than 500: 80-95% by weight of the total weight of the oil agent, and the viscosity is 30-15% at 30°C.
0 centipoise oil for thermoplastic synthetic fibers.