JP2017101365A - Polyphenylene sulfide monofilament and package thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a PPS monofilament capable of manufacturing PPS gauze fabric small in variation of numerical aperture and optical for a high precision filter at good productivity.SOLUTION: There is provided a polyphenylene sulfide monofilament having scratch tensile force when passing a ceramic guide of 0.4 cN/dtex or less and scratch tensile force variation of less than 10% by CV value. There is provided a PPS monofilament more preferably having electrostatic generation amount when passing a chromium round bar guide which is a friction body of 300 V or less.SELECTED DRAWING: None

Description

  The present invention relates to a polyphenylene sulfide (hereinafter abbreviated as PPS) monofilament and its package, and more particularly to a PPS monofilament suitable for high-precision filter applications.

  PPS is widely used as a metal substitute material or a material that can withstand extreme environments because it is excellent in heat resistance, chemical resistance, electrical insulation, etc., and is excellent in mechanical strength and moldability. PPS fibers have also been proposed to be used for industrial materials such as filters, brush bristle materials, paper-making dryer canvases, and electrical insulating papers by utilizing these characteristics.

  In particular, PPS monofilaments have been actively studied as an alternative to SUS steel wires in filter applications used in manufacturing sites such as chemistry, electricity / electronics, automobiles, food, precision instruments, medicines / medicals, and the like. Further, in recent years, higher precision of filters has been desired, and fineness of PPS monofilament has been advanced, and high-quality and high-quality PPS monofilaments have been desired. For this reason, many techniques for improving the quality of monofilaments have been proposed.

  For example, Patent Documents 1 and 2 propose monofilaments in which a spinning oil containing a water-soluble polyether-modified silicone component is attached to reduce the yarn-thread friction coefficient in order to obtain an industrial fabric with excellent quality. . However, according to the study by the present inventors, the tension fluctuation at the time of passing through the yarn path guide during warping and weaving is large only by developing the spinning oil agent containing the modified silicone component described in Patent Documents 1 and 2. As a result, the yarn tension became unstable, and it was not possible to obtain an extremely high quality woven fabric that can be used as a high-precision filter as desired today. In order to obtain an extremely high quality woven fabric that can be used as a high-precision filter, the inventors of the present invention are extremely important to reduce the tension when passing through the yarn guide and to further reduce the tension fluctuation. I found out.

  On the other hand, since PPS has high insulating properties, static electricity is likely to be generated. In order to suppress this static electricity, Patent Document 3 adds an alkyl phosphate alkali metal salt as an antistatic agent to the spinning oil in an amount of 50% by mass or more. A method has been proposed. However, when the antistatic agent is added in such a concentration, the viscosity of the spinning oil agent increases, and the tension and the variation when passing through the yarn guide during warping and weaving increase. Couldn't get.

  Furthermore, Patent Document 4 proposes a method of adding alkylene bisalkanamides during PPS melt spinning. Although it was possible to reduce the yarn-thread friction coefficient and reduce the tension when passing through the yarn path guide by adding alkylene bisalkanamides, there was static electricity between the running yarn and the guide. Was generated in large quantities, making both warping and weaving difficult. Moreover, when 3 mass% or more of alkylene bisalkanamides are added, it will result in reducing the heat resistance and chemical resistance of PPS.

  Thus, a PPS monofilament suitable for a high precision filter has not been obtained so far, and a PPS monofilament suitable for a high precision filter is strongly desired.

JP 2007-270363 A International Publication No. 2011/086954 Japanese Patent Laid-Open No. 3-8870 Japanese Patent Laid-Open No. 10-60734

  An object of the present invention is to provide a PPS monofilament capable of providing a PPS woven fabric having a very small aperture variation rate optimal for a high-precision filter with high productivity.

In order to solve the above problems, the present invention takes the following forms.
(1) A polyphenylene sulfide monofilament having a scratch tension of 0.4 cN / dtex or less when passing through a ceramic guide and a CV value of less than 10%.
(2) The polyphenylene sulfide monofilament according to (1), wherein the amount of static electricity generated at the chrome guide outlet when passing through a chrome round bar guide as a friction body is 300 V or less.
(3) A drum-shaped package in which the polyphenylene sulfide monofilament is wound.

  By using the PPS monofilament of the present invention, it is possible to provide a PPS woven fabric that has heat resistance and chemical resistance, has an extremely small opening fluctuation rate, and is optimal for a high-precision filter with high productivity. .

FIG. 1 is a schematic view of a scratch tension measuring device. Fig. 2 is a schematic diagram of a device for measuring the amount of static electricity generated

  The PPS used in the present invention has a basic repeating structural unit composed of p-phenylene sulfide, and may contain other copolymer structural units. For example, examples of the copolymer structural unit include aromatic sulfides such as m-phenylene sulfide and biphenylene sulfide, alkyl substitution products thereof, halogen substitution products, and the like. Further, other polymers may be added by mixed spinning, composite spinning, etc. Examples of the other polymers include polyester, polyamide, polyolefin, polyimide, and the like. The amount of copolymerization component and the amount of polymer added are preferably 3% by mass or less, and good heat resistance and chemical resistance can be maintained within this range. More preferably, it is 1 mass% or less, More preferably, it is not adding.

In order to obtain a highly precise filter using a PPS monofilament, it is essential to reduce the abrasion tension. For this reason, the PPS monofilament of the present invention needs to have a scratch tension of 0.4 cN / dtex or less. By setting it to 0.4 cN / dtex or less, the fretting tension at the time of passing through the yarn path guide is reduced in the warping and weaving process, the yarn does not remain distorted, and there is no occurrence of defects such as vertical and horizontal distortion. A low-cost cocoon fabric is obtained. Furthermore, PPS fibers are less susceptible to scraping than general-purpose fibers such as nylon and polyester, so if the abrasion tension exceeds 0.4 cN / dtex, the threads are scraped due to abrasion with the guide, thread breakage occurs, and the weaving speed is increased. It must be dropped, and the productivity becomes worse. The abrasion tension is more preferably 0.1 to 0.3 cN / dtex.
Further, it is necessary that the variation in the abrasion tension is less than 10% in terms of the CV value. By setting it to less than 10%, in the warping and weaving process, the fluctuation in tension when passing through the yarn path guide is reduced, the yarn tension state is stabilized, and the aperture fluctuation rate is reduced without causing defects such as vertical and horizontal distortion. A small kite fabric can be obtained. More preferably, it is 8% or less.

  The fretting tension referred to in the present invention is a tension at a point of 50 cm after the PPS monofilament passes through a rubbing body (ceramic guide) at a traveling speed of 600 m / min and passes through the yarn path regulation guide. The tension of is substituted. The measurement method will be described with reference to FIG.

  The distance L (unwinding distance) from the end surface of the yarn package 1 to the first guide 2 was set to 30 cm, and then the tensor guide 3 was passed through, and the tension (T1) at the exit of the tensor guide 3 was adjusted to 0.1 cN / dtex. After that, the yarn is run alternately up and down on the yarn path regulating alumina pin guide 4 (diameter 3 mm, 4 intervals of 10 mm) attached at a position 80 cm from the exit of the tensor guide 3. Bent at 60 ° to the alumina pin guide 6 located 15 cm below the alumina yarn path regulation guide 5-1, 5-2 through the alumina yarn path regulation guide 5-1 attached 15 cm from the pin guide 4 outlet. To pass the yarn, and run the yarn through the alumina yarn path regulating guide 5-2. The yarn is caused to run while controlling the running speed to 600 m / min by rotating around the speed regulating roller 7, and the tension (T2) is measured at a position 50 cm from the guide 5-2. The scratch tension value was sampled every 0.1 seconds, and the average value obtained per minute was divided by the fineness. Also, the fretting tension variation was a value obtained by calculating the standard deviation of the sampled numerical values and dividing the average value by 100.

In order to obtain a PPS monofilament suitable for an extremely high-precision filter, which is an object of the present invention, with high productivity, it is essential to set the scratch tension and the scratch tension variation within such ranges.
A method for controlling the scratch tension within such a range will be described in detail later, but it is preferable to use water-soluble polyether-modified silicone as a smoothing agent used in the spinning oil agent. In order to control the scratch tension variation, the fiber surface is spun. It is preferable that the oil agent is uniformly attached.

  The PPS monofilament of the present invention preferably has a static electricity generation amount of 300 V or less. By setting it to 300 V or less, in the warping and weaving process, static electricity is not generated between the running yarn and the yarn path guide, and stable warping and weaving are possible. The amount of static electricity generated is more preferably 200 V or less.

  The amount of static electricity referred to in the present invention is the amount of static electricity at the 5 cm point after passing through the friction body (chrome round bar guide) at a traveling speed of 300 m / min in a 20 ° C. × 40% RH environment. The measurement method will be described with reference to FIG.

Under an environment of 20 ° C. × 40% RH, the distance L (unwinding distance) from the end surface of the yarn package 8 to the first guide 9 is set to 30 cm, and then the tensor guide 10 is passed through. ) Is adjusted to 0.3 cN / dtex, then 90 ° bend is attached to the chrome round bar guide 11 (diameter 50 mm) mounted at a position 80 cm from the exit of the tencer guide 10 and the yarn runs at a speed of 300 m / min. Let A value obtained by measuring the amount of generated static electricity with an electrostatic machine measuring instrument (device name: digital electrostatic potential measuring instrument KSD-2000 manufactured by Kasuga Electric Co., Ltd.) at a position V of 5 cm from the chromium guide 11 was defined as the amount of static electricity generated.
As a preferable method for controlling the amount of generated static electricity within such a range, as will be described in detail later, it is preferable to appropriately select the silicone concentration and antistatic agent type in the spinning oil.

  The fineness of the PPS monofilament of the present invention is preferably 6 to 33 dtex, more preferably 6 to 22 dtex. In the case of a fineness PPS monofilament with such a range, the contact area with the guide per cross-sectional area of the yarn becomes large, so the abrasion tension during warping, weaving, and passing through the guide tends to be high, and during running Static electricity is easily generated between the yarn and the guide. Therefore, it was difficult to obtain a high-quality koji fabric, and the productivity was likely to be lowered. In order to obtain a woven fabric suitable for a high-accuracy filter with a very low aperture fluctuation rate, which is the subject of the present invention, with high productivity, it can be achieved by setting the scratch tension and the scratch tension variation within the above-mentioned ranges.

The strength of the PPS monofilament is preferably 3.0 cN / dtex or more, and more preferably 3.5 cN / dtex or more. By setting the strength to 3.0 cN / dtex or more, the durability of the filter can be improved.
Further, the boiling water shrinkage of the PPS monofilament is preferably 20% or less, and more preferably 16% or less. By setting the boiling water shrinkage to 20% or less, the dimensional stability of the filter is improved during use in a high temperature environment.

  In order to achieve the object of the present invention, the winding shape of the PPS monofilament is also extremely important, and the winding shape is preferably a drum shape. By adopting the drum shape, it is possible to suppress a sink-like defect called “Pernbique” that occurs in the Pann shape.

  The production method of the PPS monofilament preferably uses a one-step method. Here, the one-step method is a method for continuously producing spinning and stretching, and is a method for stretching a yarn extruded from an extruder without being wound once. By using the one-step method, basic physical properties such as high elongation can be obtained stably, and the productivity is also greatly improved. There is also a method of obtaining a monofilament through a splitting step after obtaining a multifilament once, but since a high elongation reduction occurs in the splitting step, as described above, a one-step method of directly spinning a monofilament is used. It is preferable.

  An example of a preferred method for producing the PPS monofilament of the present invention and its package will be described below.

In melt spinning, known methods can be used for melt extrusion of PPS. The melt-extruded polymer is measured by a known measuring device such as a gear pump through a pipe, and after passing through a foreign matter removing filter, is led to a base.
Subsequently, the yarn discharged from the die is cooled and solidified by cooling air, taken up by the heated first roller, and continuously drawn between the first roller and the second roller. Here, in order to obtain excellent mechanical properties, the take-up speed of the first roller is preferably 300 to 1000 m / min, and more preferably 400 to 800 m / min. The draw ratio is preferably 2.5 to 4.5 times, and more preferably 3.5 to 4.0 times. The heating temperature of the first roller is preferably a glass transition temperature of the polymer of −10 ° C. or higher and Tg + 20 ° C. or lower. Furthermore, the heating temperature of the second roller is preferably 140 ° C. or higher and 250 ° C. or lower.

As the winder, a known winder can be used, but the drum shape is suitable as the winder shape as described above.
In order to obtain the PPS monofilament of the present invention, it can be realized by setting the components of the spinning oil agent, the adhesion amount, the oil supply method, and the like to specific conditions. Details will be described.

  The spinning oil used in the PPS monofilament of the present invention is composed of a smoothing agent, an emulsifier, and an antistatic agent. Examples of the smoothing agent used in the spinning oil include fatty acid esters, ether esters, alkyl ethers, nonionic surfactants, PEG esters, mineral oils, modified silicones, and the like, and at least a modified silicone must be used. By using the modified silicone, it is possible to improve the lubricity of the fiber surface and suppress the abrasion tension with the guide during warping and weaving. The modified silicone is preferably an organically modified silicone so that the silicone remains when added to the spinning oil. Organic modified silicone includes alkyl modified silicone, alkyl / aralkyl modified silicone, alkyl / polyether modified silicone, polyether modified silicone, fluoro modified silicone, amino modified silicone, monoamine modified silicone, diamine modified silicone, carboxyl modified silicone, carbinol. Although there are modified silicones and the like, it is particularly preferable to use polyether-modified silicone and amine-modified silicone.

  The proportion of the modified silicone is preferably 0.1 to 5.0% by mass in the active ingredient of the spinning oil. By setting the content to 0.1% by mass or more, it is possible to suppress the rubbing tension with the yarn path guide during warping and weaving, and to obtain a woven fabric with less defects such as vertical lines and horizontal shrinkage, with no strain remaining on the yarn. Can do. Moreover, the amount of static electricity generation can be suppressed by setting it as 5.0 mass% or less, and problems, such as clogging of oil agent piping, are eliminated in the oil supply process of melt spinning. Preferably, it is 1.0-3.0 mass%. Moreover, it is preferable that the ratio of a smoothing agent shall be 40-70 mass% in the active ingredient of a spinning oil agent.

  The adhesion amount of the modified silicone with respect to the fiber mass is preferably 5 to 500 ppm, and more preferably 30 to 300 ppm. By setting it as such a range, it is possible to achieve both reduction of the scratch tension, warping, and suppression of the amount of static electricity generated during weaving. The amount of the modified silicone attached can be controlled by the ratio of the modified silicone in the spinning oil, the amount of oil supplied, and the like.

  As the antistatic agent used in the spinning oil, known ionic surfactants such as anionic surfactant, cationic surfactant, and amphoteric surfactant can be used. Since the silicone used in the present invention has a high volumetric efficiency and easily generates static electricity, the selection of the type of antistatic agent is also an important factor. Since silicone generates negative static electricity, it is preferable to use a cationic activator. Examples of the cationic activator include amine salts and amino ethers, and phosphate-type amine salts having good compatibility with silicone and excellent boundary lubrication are preferable.

  Although the addition amount of the antistatic agent with respect to an oil agent component can be suitably set according to the static electricity generation amount, it is preferable to set it as 3-12 mass%. The target antistatic effect is acquired by setting it as 3 mass% or more. Moreover, by setting it as 12 mass% or less, the viscosity of an oil agent does not become high too much and favorable high-order passage property is obtained. More preferably, it is 5-10 mass%.

From the above, in order to achieve the rubbing tension and the amount of static electricity generated according to the present invention, it is necessary to add an appropriate amount of modified silicone to the oil agent and an appropriate amount of an appropriate antistatic agent.
As the emulsifier used in the spinning oil, a known nonionic surfactant can be used. Nonionic surfactants include PEG type, ester type, and amide type, and ester type is preferred from the viewpoints of emulsion stability, compatibility with antistatic agents, and compatibility with oligomers. Moreover, it is preferable that the ratio of an emulsifier shall be 20-30 mass% with respect to the spinning oil agent mass.

  The spinning oil used in the PPS monofilament of the present invention can be used in any form of commonly used processing agents such as emulsion and straight. An emulsion system is preferable from the viewpoint of deterioration of the working environment due to the mineral oil that volatilizes in the spinning process and reduction of the global environmental load. When emulsifying, it is preferable to dilute with pure water. Moreover, it is preferable that an emulsion density | concentration shall be 3-20 mass% with respect to the spinning oil agent mass. The oil supply position is preferably supplied in front of the first roller.

  In order to obtain the PPS monofilament of the present invention, it is necessary to uniformly apply the spinning oil to the fiber surface. As a method for supplying the spinning oil, it is preferable to use a known oil supply device represented by an oil supply roller and an oil supply guide, and to use face-to-face oil supply that simultaneously applies the spinning oil by a pair of oil supply devices facing each other across a traveling monofilament. In the case of single-sided oil supply, the amount of the spinning oil decreases from the monofilament oil supply side to the opposite side and sometimes does not adhere to the opposite side. As a result, the adhesion of the spinning oil is generated, and the variation in abrasion tension becomes large. On the other hand, in the case of face-to-face lubrication, it becomes possible to uniformly apply the spinning oil to the fiber surface, and it is possible to suppress fretting tension variation.

The adhesion spots of the spinning oil (hereinafter referred to as oil adhesion spots) can be evaluated by measuring the oil adhesion amount in the longitudinal direction of the PPS monofilament of the same package. The oil agent adhesion spots are preferably 0.10 or less with a standard deviation. By setting it within this range, the warp and weaving processes have a small variation in tension when passing through the yarn path guide, a stable yarn tension state, and no small vertical fluctuation or horizontal shrinkage defect. Can be obtained. More preferably, it is 0.08 or less.
The oil adhesion amount of the PPS monofilament of the present invention is preferably 0.30 to 1.50 mass% with respect to the fiber mass. Oil adhering spots can be reduced by setting it to 0.30% by mass or more, and by setting it to 1.50% by mass or less, oil droplets and scum during warping and weaving can be suppressed, and productivity of silk fabric can be improved. improves. More preferably, it is 0.35-1.00 mass%. The oil adhesion amount can be controlled by oil supply conditions (oil supply method, spinning oil supply amount, concentration in the case of an emulsion system) and the like.

  The PPS monofilament thus obtained is warped by a warping machine so as to have a desired opening, and after weft driving with a rapier loom or a water jet loom, it is cut into an arbitrary shape and becomes a filter. As an application of this filter, it is used as, for example, an injection filter of an automobile engine or a filter in a medical field.

Hereinafter, the present invention will be described in detail by way of examples. In addition, the measuring method in an Example is as follows.

(1) Opening fluctuation rate Warp the PPS monofilament to 380 lines / inch (2.54 cm) with a warping machine, and 380 lines / inch (2.54 cm) with a rapier loom (the opening is square. Weaving so that This trial fabric was observed with a scanning electron microscope (Nikon ESEM-2700) at a magnification of 1000 times, and the distance between fibers at each of 20 openings (the widest part of each opening) Each was measured on the order of 0.1 μm. The opening fluctuation rate was calculated by the following equation.
(Opening fluctuation rate) = (Standard deviation) / (Average value) × 100
Note that the aperture fluctuation rate was 3% or less, which is an index of a high-precision filter, as acceptable.

(2) Abrasion tension, Abrasion tension variation (CV value)
The abrasion tension was measured with a measuring apparatus shown in FIG. The distance L (unwinding distance) from the end surface of the yarn package 1 to the first guide 2 was set to 30 cm, and then the tensor guide 3 was passed through, and the tension (T1) at the exit of the tensor guide 3 was adjusted to 0.1 cN / dtex. After that, the yarn is run on an alumina pin guide 4 (diameter 3 mm, 10 mm interval 4) for yarn path regulation attached at a position 80 cm from the exit of the tensor guide 3, and an alumina yarn attached at a position 15 cm from the exit of the pin guide 4. Via the path regulation guide 5-1, the friction body 6 of the alumina pin guide (diameter 3mm) located 15cm below the alumina thread path regulation guide 5-1, 5-2 is bent by 60 ° and passes through the yarn. The yarn is caused to travel through the alumina yarn path regulation guide 5-2, and is circulated by the speed regulation roller 7 to take the yarn while controlling the running speed to 600 m / min. (Take-up device is not shown), to tension (T2) measured at a 50cm from the guide 5-2. The scratch tension value was sampled every 0.1 seconds, and the average value obtained per minute was divided by the fineness. Also, the fretting tension variation was a value obtained by calculating the standard deviation of the sampled numerical values and dividing the average value by 100.

(3) Static electricity generation amount Static electricity generation amount was measured with the apparatus shown in FIG. The static electricity amount is 5 cm after passing through the friction body (chrome round bar guide) through the PPS monofilament at a traveling speed of 300 m / min in a 20 ° C. × 40% RH environment. The measurement method will be described with reference to FIG.

  Under an environment of 20 ° C. × 40% RH, the distance L (unwinding distance) from the end surface of the yarn package 8 to the first guide 2 is set to 30 cm, and then the tensor guide 10 is passed through. ) Is adjusted to 0.3 cN / dtex, and 90 ° bend is attached to the chrome round bar guide 11 (diameter 50 mm) mounted at a position 80 cm from the exit of the tencer guide 10 to control the traveling speed to 300 m / min. While supplying the yarn (yarn supplying device is not shown), the electrostatic machine measuring device (device name: digital electrostatic potential measuring device KSD- manufactured by Kasuga Electric Co., Ltd.) at a position V of 5 cm from the chrome round bar guide 11 2000), the amount of static electricity measured.

(4) Fineness Calculated according to JIS L 1013 (2010) 8.3.1 A method.

(5) Strength Measured according to JIS L 1013 (2010) 8.5.1.

(6) Boiling water shrinkage rate Measured according to JIS L 1013 (2010).

(7) Oil content, oil content spots PPS monofilaments of the same package were sampled 3 times in the longitudinal direction 10 times each, the oil content was measured with MQC-23 manufactured by OXFORD, and the average value was defined as the oil content. In addition, oil adhesion spots were the standard deviation values.

(8) Modified silicone adhesion amount The silicone adhesion amount was measured using fluorescent X-ray analysis.

(9) Warping speed A fiber package is mounted on the warping machine, the warping speed is set at 100 m / min for 10 minutes, and it is judged whether the warping can be performed stably without trouble such as generation of static electricity or yarn sticking. If possible, the upper limit speed at which the warping can be stably performed by increasing the speed every 50 m / min was set as the upper limit of the warping speed. In the case where it was not possible, the upper limit speed at which the warping could be performed stably by decreasing the speed every 50 m / min was taken as the upper limit of the warping speed, and the evaluation was made in the following three stages.
○: 250 m / min or more Δ: 200 m / min or more and less than 250 m / min x: less than 200 m / min.
○ and △ indicate good weaving productivity, and × indicate poor weaving productivity.

[Example 1]
E2280 manufactured by Toray Industries, Inc. was used as the PPS polymer pellet, and melt spinning was performed at a spinning temperature of 320 ° C. and a single hole discharge rate of 3.9 g / min. For spinning, a round hole die having 8 holes, a hole diameter (D) of the die hole of 0.40 mm, and L / D of 6.0 was used, and the polymer discharged from the die was cooled by a cooling air blowing device. Next, the oil was supplied with a pair of facing oil supply guides facing each other. The spinning oil comprises 1% by mass of a water-soluble polyether-modified silicone having an average molecular weight of 3200 as a smoothing agent and 64% by mass of a fatty acid alkyl ester, 7% by mass of a phosphate type amine salt as an antistatic agent, and a polyvalent ester 28 as an emulsifier. A spinning oil composition comprising 5% by mass is emulsified at a concentration of 5% by mass. Then, it pulled at 834 m / min with the 1st roller heated at 100 degreeC, and it extended | stretched 3.6 times between the 2nd rollers heated to 200 degreeC continuously. The drawn yarn was wound as it was using a microcam traverse type winder to obtain a 13 dtex PPS monofilament, a winding width of 130 mm, a winding thickness of 40 mm and a winding amount of 1.0 kg as a drum package. .

  The warp machine was used to warp the PPS monofilament to 380 pieces / inch (2.54 cm), and it was woven using a rapier loom so as to obtain 380 pieces / inch (2.54 cm). Table 1 shows the raw yarn characteristics and weaving evaluation results of the obtained PPS monofilament.

The obtained PPS monofilament had a rubbing tension of 0.24 cN / dtex, a variation of 7.9%, and a static electricity generation amount of 190 V.
Further, a warp woven fabric having a warping speed of 300 m / min, good weaving productivity, and an aperture variation rate of 1.5%, which is an extremely small aperture variation rate, which is a quality requirement of a high precision filter, was obtained.

[Example 2]
A 13 decitex PPS monofilament and drum-shaped package were obtained in the same manner as in Example 1 except that the water-soluble polyether-modified silicone was 5% by mass and the fatty acid alkyl ester was 60% by mass.
Table 1 shows the raw yarn characteristics and weaving evaluation results of the obtained PPS monofilament.
The rubbing tension of the obtained PPS monofilament was 0.19 cN / dtex, the variation was 7.7%, and the amount of static electricity generated was 290V.
A warp woven fabric suitable for a high precision filter having a warping speed of 250 m / min, good weaving productivity, and an aperture fluctuation rate of 1.7% was obtained.

[Example 3]
A 13 dtex PPS monofilament and drum-shaped package were obtained in the same manner as in Example 1 except that the water-soluble polyether-modified silicone was 0.5% by mass and the fatty acid alkyl ester was 64.5% by mass.
Table 1 shows the raw yarn characteristics and weaving evaluation results of the obtained PPS monofilament.
The obtained PPS monofilament had a rubbing tension of 0.33 cN / dtex, a variation of 8.4%, and a static electricity generation amount of 160 V.
A warp woven fabric suitable for a high-precision filter having a warping speed of 300 m / min, good weaving productivity, and an aperture fluctuation rate of 2.2% was obtained.

[Example 4]
A 13 dtex PPS monofilament and drum-shaped package were obtained in the same manner as in Example 1 except that 0.1% by mass of water-soluble polyether-modified silicone and 64.9% by mass of fatty acid alkyl ester were used.
Table 1 shows the raw yarn characteristics and weaving evaluation results of the obtained PPS monofilament.
The rubbing tension of the obtained PPS monofilament was 0.39 cN / dtex, the variation was 9.1%, and the amount of static electricity generated was 140V.
A warp woven fabric suitable for a high-precision filter having a warping speed of 250 m / min, good weaving productivity, and an aperture fluctuation rate of 2.6% was obtained.

[Example 5]
A 13 decitex PPS monofilament, drum-like package was obtained in the same manner as in Example 1 except that oil was supplied by a pair of facing oiling rollers facing each other.
Table 1 shows the raw yarn characteristics and weaving evaluation results of the obtained PPS monofilament.
The obtained PPS monofilament had a rubbing tension of 0.27 cN / dtex, a variation of 9.8%, and a static electricity generation amount of 190 V.
A warp woven fabric suitable for a high-precision filter having a warping speed of 300 m / min, good weaving productivity, and an aperture fluctuation rate of 2.7% was obtained.

[Example 6]
A 13 dtex PPS monofilament and drum-shaped package were obtained in the same manner as in Example 1 except that the modified silicone component of the smoothing agent was a water-soluble amine silicone spinning oil having a molecular weight of 3100.
Table 1 shows the raw yarn characteristics and weaving evaluation results of the obtained PPS monofilament.
The rubbing tension of the obtained PPS monofilament was 0.28 cN / dtex, the variation was 7.7%, and the amount of static electricity generated was 200V.
A warp woven fabric suitable for a high-precision filter having a warping speed of 300 m / min, good weaving productivity, and an aperture fluctuation rate of 1.8% was obtained.

[Example 7]
A 13 dtex PPS monofilament, drum-shaped package was obtained in the same manner as in Example 2 except that the antistatic agent was a sulfonate sodium salt spinning oil.
Table 1 shows the raw yarn characteristics and weaving evaluation results of the obtained PPS monofilament.
The obtained PPS monofilament had a rubbing tension of 0.21 cN / dtex and a variation of 8.3%, but the amount of static electricity generated was 320V.
For this reason, the aperture fluctuation rate was as good as 1.8%, but the warping speed was 200 m / min, and the productivity was slightly inferior.

[Comparative Example 1]
A 13 decitex PPS monofilament, drum-shaped, in the same manner as in Example 1, except that 0.05% by weight of water-soluble polyether-modified silicone having a molecular weight of 3200 and 64.9% by weight of fatty acid alkyl ester are used as the smoothing agent component. Got the package.
The obtained PPS monofilament has a rubbing tension of 0.46 cN / dtex, and the surface of the PPS monofilament fiber is scraped by rubbing with the guide. Many yarn breaks occur during weaving. The result was inferior. In addition, a woven fabric satisfying an opening fluctuation rate of 3.7% was not obtained.

[Comparative Example 2]
A 13 dtex PPS monofilament, drum-shaped package was obtained in the same manner as in Example 1 except that the oil was supplied by a single-sided guide oil supply device.
The obtained PPS monofilament has a fretting tension variation of 11.3%, oil adhesion spots as high as 0.12, unstable yarn tension when passing through the guide, and a satisfactory change in the opening rate of the fabric of 4.1%. No woven fabric was obtained.

[Comparative Example 3]
A 13 dtex PPS monofilament, drum-shaped package was obtained in the same manner as in Example 1 except that the modified silicone component of the smoothing agent was not added.

  The obtained PPS monofilament has a rubbing tension of 0.60 cN / dtex, and its variation is as high as 10.3%. The surface of the PPS monofilament fiber is scraped off by rubbing with the guide, resulting in frequent yarn breaks during weaving, and a weaving speed of 150 m / Min, the result was inferior in productivity. In addition, the yarn tension when passing through the guide was unstable, and a woven fabric satisfying an opening fluctuation rate of 5.2% was not obtained.

  Since the PPS monofilament obtained by the present invention has heat resistance and chemical resistance and has a very small opening fluctuation rate, it is possible to manufacture high-precision filters. Used in manufacturing sites for automobiles, food, precision equipment, medicine and medical care.

1: Yarn package 2: First guide 3: Tensor guide 4: Pin guide 5-1: Alumina yarn path regulation guide 5-2: Alumina yarn path regulation guide 6: Friction body (alumina pin guide)
7: Speed regulating roller 8: Yarn package 9: First guide 10: Tensor guide 11: Chrome round bar guide T1: Tensor guide tension T2: Tension after passing through friction body L: Unwinding distance Y: Running yarn direction

Claims (3)

  A polyphenylene sulfide monofilament having a scratch tension of 0.4 cN / dtex or less when passed through a ceramic guide and a CV value of less than 10%.   2. The polyphenylene sulfide monofilament according to claim 1, wherein the amount of static electricity generated at a chromium round bar guide outlet when passing through a chromium round bar guide as a friction body is 300 V or less. 3.   A drum-shaped package in which the polyphenylene sulfide monofilament according to claim 1 or 2 is wound.

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