JP2021161572A - Fiber package made of polyphenylene sulfide monofilament, and method of producing the same - Google Patents

Abstract

To provide, with high productivity, a fiber package of a polyphenylene sulfide monofilament, in which bobbin collapsing and bobbin tightening are prevented, a sink mark at unwinding is improved, and a streak break and a thread break during weaving are improved.SOLUTION: There is provided a fiber package in which a polyphenylene sulfide monofilament whose main constituent unit is a p-phenylene sulfide unit is wound on a pan-shaped bobbin, in which the fiber package of the polyphenylene sulfide monofilament has a winding width of 100 to 250 mm, a taper angle of 30 to 140°, a twill angle of 0.8 to 2°, and a heat shrinkage stress ratio of innermost and outermost layers of 0.85 to 1.15.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fiber package made of a polyphenylene sulfide monofilament and a method for producing the same.

As industrial filters, mesh woven fabrics made of polyphenylene sulfide, polyvinylidene fluoride, liquid crystal polyester, etc. are often used at present from the viewpoints of chemical resistance, dimensional stability, thermal durability, and the like. In particular, a mesh woven fabric made of polyphenylene sulfide is widely used because it has excellent chemical resistance, dimensional stability and cost performance, and is suitable for fields requiring high filter performance. Further, in recent years, since the productivity of fine monofilaments is very low, it is expected that the cost can be reduced by shortening the process by using the direct spinning and drawing method.
Generally, as a method for producing a monofilament having a fineness of 50 dtex or less, a conventional method in which a yarn is melt-spun, the yarn is cooled by cold air, an undrawn yarn is wound up and then drawn, or a main yarn made of a multifilament is used. Is directly spun and drawn, and then the main yarn is split to obtain a monofilament.
Patent Document 1 describes a polyphenylene sulfide monofilament having a fineness of 25 dtex or less, a strength of 3.0 cN / dtex or more, an elongation of less than 30%, and the like, and is conventional as a method for producing this monofilament. It is stated that the method is used.
Further, in Patent Document 2, a package in which a polyphenylene sulfide monofilament obtained by a direct spinning drawing method in which the obtained undrawn yarn is continuously drawn without being wound once and wound by a winder is wound into a drum shape. Is described.

Japanese Patent No. 4844515 JP-A-2017-101365

However, in the monofilament pan-shaped fiber package obtained from Patent Document 1, pan pulling is likely to occur when the innermost layer portion is unraveled. Further, if the main yarn made of multifilaments is separated by the conventional method as described in Patent Document 1 or by the direct spinning and drawing method, the number of production steps increases, so that the yield decreases and the cost increases. do.
In the case of a drum shape as described in Patent Document 2, poor unwinding of the yarn may occur due to the yarn falling from the wound end surface (twilling), which may cause a problem during weaving.

Therefore, the present invention solves the above-mentioned problems, can be obtained by the direct spinning and drawing method with high production efficiency, prevents the bobbin from collapsing, and improves the sink mark at the time of unwinding. The purpose of the present invention is to obtain a high-quality polyphenylene sulfide monofilament fiber package capable of suppressing the generation of streaks.

In the fiber package of polyphenylene sulfide monofilament, the present inventor sets the oil-fat adhesion rate and winding tension to a specific thread, and by specifying the fiber package of the bobbin, there is no sink mark, streak, or scum, and the winding is tightened. , It has been found that a fiber package that does not collapse can be obtained by a direct spinning and drawing method.
That is, the present invention is a fiber package in which a polyphenylene sulfide monofilament whose main constituent unit is a p-phenylene sulfide unit is wound around a pan-shaped bobbin, and has a winding width of 100 to 250 mm and a taper angle of 30 to 140 °. Polyphenylene sulfide monofilament having a twill angle of 0.8 to 2 ° and a ratio of heat shrinkage stress values between the innermost layer and the outermost layer of the package (heat shrinkage stress ratio of the innermost and outer layers) of 0.85 to 1.15. It is a fiber package.
The second aspect of the present invention is the above-mentioned fiber package in which the fineness of the polyphenylene sulfide monofilament is 6 to 35 dtex.
The third aspect of the present invention is the above-mentioned fiber package in which the breaking strength of the polyphenylene sulfide monofilament is 3.4 cN / dtex or more and the breaking elongation is 24 to 40%.
Fourth, the fiber package having a 5% modulus of 1.0 to 1.8 cN / dtex and a 10% modulus of 1.4 to 2.6 cN / dtex.
Fifth of the present invention, a polyphenylene sulfide resin whose main constituent unit is a p-phenylene sulfide unit is melt-extruded, cooled and solidified, and then the obtained undrawn yarn is continuously drawn without being wound up to a winder. This is a method for producing a fiber package made of polyphenylene sulfide monofilament by a direct spinning and drawing method in which a bobbin is wound with a winding tension of 0.1 to 0.5 cN / dtex.
Sixth of the present invention, the obtained undrawn yarn is adhered with oil and fat so that the oil and fat adhesion rate of the polyphenylene sulfide monofilament is 0.15 to 0.45% by mass, then stretched and wound on a bobbin. This is a method for producing the above-mentioned fiber package made of a characteristic polyphenylene sulfide monofilament.
Seventh of the present invention, a polyphenylene sulfide resin whose main constituent unit is a p-phenylene sulfide unit is melt-extruded, cooled and solidified, and then the obtained undrawn yarn is continuously drawn without being wound up and panned by a winder. A method for producing a fiber package made of polyphenylene sulfide monofilament by a direct spinning drawing method in which the undrawn yarn is wound on a bobbin, and the oil / fat adhesion rate of the polyphenylene sulfide monofilament is 0.15 to 0 before the undrawn yarn is wound on the bobbin. Apply oil and fat so that it is .45% by mass, and wind it into a bobbin in a pan shape so that the winding width is 100 to 250 mm, the taper angle is 30 to 140 °, and the twill angle is 0.8 to 2 °. It is a method for producing a fiber package made of a characteristic polyphenylene sulfide monofilament.

According to the fiber package made of the polyphenylene sulfide monofilament of the present invention, it can be produced by the direct spinning and drawing method, the winding operability of the monofilament is improved, the bobbin is prevented from being rolled up and tightened, and the sink mark at the time of unwinding is also prevented. It can be improved and the occurrence of streaks, thread breaks, and scum during weaving can be suppressed.

It is a schematic front view of the polyphenylene sulfide monofilament fiber package of this invention.

Hereinafter, the present invention will be described in detail.

The polyphenylene sulfide resin in the present invention is a polyphenylene sulfide composed of a polymer having a phenylene sulfide unit as a main repeating unit. Examples of the phenylene sulfide unit include a p-phenylene sulfide unit and an m-phenylene sulfide unit. The polyphenylene sulfide may be a homopolymer composed of a p-phenylene sulfide unit, an m-phenylene sulfide unit, or the like, or a copolymer having these, but from the viewpoint of heat resistance, processability, and economy. Repeating units of p-phenylene sulfide are preferred.

The polymer type of polyphenylene sulfide includes a crosslinked type, a semicrosslinked type, and a linear type (linear type), and the linear type is preferable in terms of spinning and stretchability.

Further, as long as the effects of the present invention are not impaired, various metal oxides, kaolin, silica and other inorganic substances, colorants, matting agents, flame retardants, antioxidants, ultraviolet absorbers, infrared absorbers, crystal nucleating agents , Fluorescent whitening agent, terminal group encapsulant, compatibilizer and other various additives may be contained in a small amount in polyphenylene sulfide.

The melt flow rate (MFR) of the polyphenylene sulfide resin in the present invention is preferably 100 to 250 g / 10 min. More preferably, it is 130 to 200 g / 10 min. From the viewpoint of easy spinning, 100 g / min or more is preferable. 250 g / min or less is preferable from the viewpoint of maintaining the strength of the fiber and giving strength durability to a mesh woven fabric such as a filter for preferable use.

The water content of the pellet of the polyphenylene sulfide resin before spinning in the present invention is preferably 100 ppm or less, more preferably 10 to 50 ppm. If it exceeds 100 ppm, the spinning operability may be lowered due to the cause of yarn breakage in spinning and the mixing of bubbles (air bubbles).

The pellet of the polyphenylene sulfide resin in the present invention is preferably pre-dried from which low molecular weight components are removed by vacuum drying as much as possible, and the drying temperature is preferably 130 to 190 ° C. and the drying time is preferably 6 to 12 hours.

The cross-sectional shape of the polyphenylene sulfide monofilament in the present invention is not particularly limited, but the outer shape of the fiber is preferably circular.

The fineness of the polyphenylene sulfide monofilament in the present invention is preferably 6 to 35 dtex from the viewpoint of being preferably used for a filter or the like. When it is 35 dtex or less, it is easy to solidify by cold air, and it is easy to obtain a high-quality monofilament suitable for products such as filters.

The breaking strength of the polyphenylene sulfide monofilament in the present invention is 3.4 cN / dtex or more, more preferably 3.8 cN / dtex or more, from the viewpoint of durability of a mesh such as a filter. When the strength was less than 3.4 cN / dtex, the durability of the mesh such as the filter tended to decrease.

The elongation at break of the polyphenylene sulfide monofilament in the present invention is 24 to 40%. More preferably, it is 30 to 35%. If the elongation at break is less than 24%, yarn breakage occurs frequently during spinning, and reeds may be scraped during weaving or the weavability may be deteriorated. If the elongation at break exceeds 40%, the dimensional stability of the mesh may deteriorate due to the increase in the amorphous portion of the filament, and the durability may decrease.

The 5% modulus of the polyphenylene sulfide monofilament in the present invention is preferably 1.0 to 1.8 cN / dtex, more preferably 1.2 to 1.6 cN / dtex. The 5% modulus is preferably high from the viewpoint of mesh durability, but is preferably 1.8 cN / dtex or less from the viewpoint of preventing sink marks that occur when the inner layer of the bobbin is unraveled. From the viewpoint of maintaining the dimensional stability and strength durability of the mesh, 1.0 cN / dtex or more is preferable, and within this range, misalignment can be easily suppressed.

The 10% modulus of the polyphenylene sulfide monofilament in the present invention is preferably 1.4 to 2.6 cN / dtex, more preferably 1.7 to 2.1 cN / dtex. The 10% modulus is preferably high from the viewpoint of mesh durability, but is 2.6 cN / dtex or less from the viewpoint of obtaining a high-quality mesh without causing sink marks that occur when the inner layer of the bobbin is unwound. It is preferable to have. It is preferably 1.4 cN / dtex or more from the viewpoint of maintaining the dimensional stability and strength durability of the mesh and easily suppressing the misalignment.

The hydrothermal shrinkage of the polyphenylene sulfide monofilament in the present invention is preferably 10% or less. More preferably, it is 2 to 8%. The hot water shrinkage rate is preferably low from the viewpoint of dimensional stability of the mesh. If it exceeds 10%, the dimensional stability of the mesh tends to deteriorate, which may result in a poor quality filter.

The ratio of the heat shrinkage stress value of the polyphenylene sulfide monofilament in the present invention between the innermost layer and the outermost layer (heat shrinkage stress ratio of the innermost and outer layers) is preferably 0.85 to 1.15. More preferably, it is 0.9 to 1.1. If the heat shrinkage stress ratio of the innermost and outer layers is out of the range, it may contribute to rolling collapse and tightening, and distortion may occur in the mesh fabric due to the stress difference, resulting in poor quality mesh fabric.

The oil / fat adhesion rate is preferably 0.15 to 0.45% by mass from the viewpoint of the post-process passability of the polyphenylene sulfide monofilament in the present invention and the point of obtaining a mesh woven fabric having good quality. More preferably, it is 0.25 to 0.35% by mass. If it is less than 0.15% by mass, static electricity is likely to be generated, and the handleability of weaving and the like tends to be inferior. If it exceeds 0.45% by mass, scum tends to occur during weaving, which may affect the quality of mesh fabrics and industrial filters, and may cause bobbin collapse in the spinning and winding process.

A suitable oil agent for the polyphenylene sulfide monofilament in the present invention contains 30% by mass or more of a fatty acid ester-based smoothing agent from the viewpoint of smoothness and prevention of reed threading, and an antistatic agent or an emulsifier may be added as appropriate. good. In addition, it is more preferable to add 1 to 3% by mass of the modified silicone with respect to the stock solution of the oil agent to further improve the smoothness. If the amount of the modified silicone is excessively added, the yarn may slip in the bobbin during winding, which may cause the winding to collapse. Therefore, the above range is preferable. As a suitable method for applying an oil agent, a method of forming an emulsion of 5 to 20% by mass with ion-exchanged water and applying it with an oiling nozzle directly above the pretension roll can be mentioned.

The polyphenylene sulfide monofilament in the present invention is produced by a direct spinning and drawing method in which an undrawn yarn obtained by spinning is drawn without being wound once to obtain a monofilament.
After the undrawn yarn is drawn, it is wound on a bobbin with a winder to obtain a fiber package. In the winding process, the winding tension when the yarn coming out of the final goded roll is wound with a winder is 0.1. ~ 0.5 cN / dtex. More preferably, it is 0.2 to 0.3 cN / dtex. When the take-up tension is less than 0.1 cN / dtex, the tension between the goded roll and the winder is too low, so that the bobbin is often unwound and the thread is broken, and it is difficult to collect the monofilament normally. If it exceeds 0.5 cN / dtex, the bobbin is tightened and it is difficult to pull out the bobbin from the bobbin holder of the winder.

The bobbin shape of the fiber package made of the polyphenylene sulfide monofilament of the present invention is preferably a pan shape that is tapered around a paper tube used in a commonly used direct spinning and drawing method. Generally, in the direct spinning and drawing method, a drum-shaped bobbin is used, but in the case of a drum-shaped bobbin, when a monofilament is wound, the yarn tends to fall from the bobbin end face (twill drop). When this occurs, the yarn is caught on the end face at the time of unwinding, causing yarn breakage, weaving failure, and streaks, resulting in deterioration of post-process passability such as weaving and deterioration of product quality.

As a winding condition of the fiber package made of the polyphenylene sulfide monofilament of the present invention, the winding width of the innermost layer portion of the paper tube is 100 to 250 mm. More preferably, it is 150 to 200 mm. If the winding width is less than 100 mm, the winding amount cannot be increased unless the taper angle is increased. It causes thread breakage and streaks, resulting in poor weavability. Considering that the number of ends of the winder and the length of the winder are limited, the upper limit of the winding width is preferably 250 mm from the viewpoint of the productivity and cost of the fiber package.

The taper angle of the fiber package of the present invention is 30 to 140 °. More preferably, it is 45 to 100 °. If the taper angle is less than 30 °, the winding collapse does not occur, but before the regular winding amount is wound, the winding width at both ends approaches, contacts, and collapses as the winding thickness increases, resulting in productivity. Inferior. When the taper angle exceeds 140 °, the yarn tends to fall from the taper portion and the winding collapse occurs. For reference, under the condition of 180 ° (corresponding to drum-type winding), the winding collapse due to the twill drop occurs frequently.

The twill angle of the fiber package of the present invention is 0.8 to 2 °. More preferably, it is 0.9 to 1.2 °. If the twill angle is less than 0.8 °, ribbon-shaped threads will stick to the surface of the package, resulting in poor unwinding of the bobbin and poor appearance. If it exceeds 2 °, when the traverse moves the yarn to both ends, the yarn is ejected by the force of the thread, and the yarn falls from the tapered portion, causing winding collapse, and it tends to occur frequently especially at a fineness of 20 dtex or more.

Hereinafter, the present invention will be specifically described with reference to examples. The present invention is not limited to the examples described below. The physical characteristics and evaluation of the filament in the examples were as follows.
A. MFR
According to JIS-K-7210 (1999), the MFR value was measured under the conditions of a temperature of 315.5 ° C. and a load of 5000 g.
B. Fineness According to JIS-L-1013, the sample was wound up at a speed of 120 times / min using a measuring machine with a frame circumference of 1.125 m, and its mass was weighed to determine the fineness. This was measured 5 times and the average value was calculated.
C. Breaking strength, breaking elongation, 5% modulus, 10% modulus According to JIS-L-1013, using AGS-1KNG autograph tensile tester manufactured by Shimadzu Corporation, sample yarn length 20 cm, constant speed tensile speed 20 cm / min. Measure under conditions. The value obtained by dividing the maximum value of the load on the load-elongation curve by the fineness is defined as the breaking strength (cN / dtex), the elongation at that time is defined as the breaking elongation (%), and the strength when the elongation is 5% is 5. % Modulus (cN / dtex), and the intensity when the elongation rate is 1% is 10% modulus (cN / dtex).
D. The heat-accommodating stress specific heat shrinkage stress of the innermost and outer layers is measured using a KE-II type shrinkage stress measuring device manufactured by Kanebo Engineering. An initial load of fineness x 2/30 (cN) is applied to a sample in which the thread ends are tied in a loop shape with a length of 5 cm, and the heat shrinkage force when heated from room temperature at a heating rate of 120 ° C./min is measured. do. The highest point of the measured heat shrinkage force is defined as the heat shrinkage force peak (cN), and the temperature at that time is defined as the heat shrinkage force peak temperature (° C.). Then, the value obtained by dividing the maximum value of the heat shrinkage force by twice the fiber fineness was defined as the heat shrinkage stress (cN / dtex), and the value was measured 5 times and the average value was defined as the heat shrinkage stress. The heat collection stress ratio (Sr) of the innermost and outer layers is calculated by the following equation 1.
Sr = Si / So ・ ・ ・ Equation 1
(Sr: heat collection stress ratio of the innermost and outer layers, Si: heat shrinkage stress of the innermost layer of the package [measure the point of winding thickness 1 mm from the outer diameter of the paper tube], So: heat shrinkage stress of the outermost layer of the package [package Measure the point after 1 decomposition of the surface layer of
E. Winding state of fiber package The winding operability was evaluated as "○" if the winding shape was good, "△" for slight winding collapse and insufficient winding amount, and "×" for severe winding collapse and unwinding.
F. Weavability and appearance evaluation
Using the obtained polyphenylene sulfide monofilament, a sulzer type loom at a rotation speed of 300 rpm, 420 mesh / 2.54 cm (less than 11 dtex), 225 mesh / 2.54 cm (11 dtex or more, less than 21 dtex), 150 mesh / 2. A mesh fabric of 54 cm (21 dtex or more, 35 dtex) was woven. At that time, the state of the scum of the reed, the warp yarn, and the weft yarn breakage was visually confirmed and evaluated as the weavability. The appearance of the obtained woven fabric (knots, sink marks, streaks, etc.) was visually confirmed and evaluated as an appearance evaluation.
If both the weavability and appearance evaluation were good, it was rated as "○", if either was bad, it was rated as "Δ", and if both were poor, it was rated as "x".
G. Mesh performance evaluation Using the mesh woven fabric obtained in F, heat setting is performed at 160 ° C. for 20 minutes, and the appearance of the processed mesh woven fabric (before and after the heat setting) after the elongation recovery cycle is evaluated. The elongation recovery cycle conforms to JIS-L-1013, and uses an AGS-1KNG autograph tensile tester manufactured by Shimadzu Corporation under the conditions of a sample length of 20 cm, a width of 5 cm, and a constant velocity tensile speed of 20 cm / min. Perform the cycle 5 times. The appearance of the mesh woven fabric at that time was visually observed. Those without misalignment, distortion or damage were marked with "○", those with distortion or slight damage were marked with "x", and those without distortion or damage could be marked with "△".
H. Comprehensive evaluation Regarding the items of spinning operability, weavability and appearance evaluation, and mesh performance evaluation, all the items judged as 〇 are "○", those with one or more △ and no × are "△", one item. However, those with x were marked as "x".

[Example 1]
A p-polyphenylene sulfide resin (moisture content: 20 ppm) having an MFR of 160 g / 10 min was prepared and melted at a spinning temperature of 328 ° C. The molten polyphenylene sulfide was discharged using a spinning mouthpiece (L / D = 0.65 mm / 0.65 mm) having two pores at a discharge amount having a fineness of 33 dtex after stretching. The discharged polyphenylene sulfide yarn is cooled by a uniflow type cooling device, an emulsion oil is applied (OPU = 0.3% by mass), and then the yarn is put into an unheated pretension roll at a speed of 1040 m / min. After winding and continuing to apply tension between Goded Roll 1 (speed 1058 m / min, 115 ° C), main stretching and heat setting are performed with Goded Roll 2 (speed 3520 m / min, 135 ° C), and Goded Roll 3 (speed 3500 m). It was relaxed with / min (without heating) and relaxed, and wound on a bobbin with a winder (speed 3495 m / min) at a winding tension of 0.2 cN / dtex. At this time, the bobbin shape was a pan shape with a tapered end face, and the bobbin was wound with a winding width of 200 mm, a taper angle of 60 °, and a twill angle of 1 ° to obtain a fiber package.

[Example 2]
A fiber package was obtained in the same manner as in Example 1 except that the taper angle was adjusted to 120 °, the winding speed was adjusted, the winding tension was changed to 0.4 cN / dtex, and the oil / fat adhesion rate was changed to 0.4% by mass. ..

[Comparative Example 1]
A fiber package was obtained in the same manner as in Example 1 except that the taper angle was changed to 180 °, the bobbin shape was changed to a drum type, and the twill angle was changed to 5 °.

[Comparative Example 2]
A fiber package was obtained in the same manner as in Example 1 except that the taper angle was changed to 180 ° and the bobbin shape was changed to a drum type.

[Comparative Examples 3 and 4]
A fiber package was obtained in the same manner as in Example 1 except that the taper angles were changed to 160 ° and 20 °.

[Comparative Examples 5 and 6]
A fiber package was obtained in the same manner as in Example 1 except that the twill angles were changed to 0.5 ° and 2.5 °.

[Example 3]
A p-polyphenylene sulfide resin having an MFR of 160 g / 10 min was prepared and melted at a spinning temperature of 328 ° C. The molten polyphenylene sulfide was discharged using a spinning mouthpiece (L / D = 0.35 mm / 0.31 mm) having two pores at a discharge rate of 10 dtex after drawing. The discharged polyphenylene sulfide yarn is cooled by a uniflow type cooling device to obtain an undrawn yarn, and then an emulsion oil is applied, and the undrawn yarn is not once wound up but is subjected to a drawing step and a relaxing step. It was wound on a bobbin with a winder to obtain a fiber package consisting of 10 dtex polyphenylene sulfide monofilaments. In the drawing step, the yarn is first wound on an unheated pretension roll (speed 940 m / min), tension is applied to the next goded roll 1 (speed 970 m / min, 100 ° C.), and then the goded roll 2 Main stretching and heat setting are performed at (speed 3110 m / min, 130 ° C.), relaxed with Goded Roll 3 (speed 3100 m / min, unheated) in the relaxing process, and winder (winder winding tension 0.4 cN / dtex). It was wound on a bobbin at a speed of 3100 m / min). The bobbin shape was a pan shape with a tapered end face, with a winding width of 200 mm, a taper angle of 60 °, and a twill angle of 1 °.

[Example 4]
A p-polyphenylene sulfide resin having an MFR of 160 g / 10 min was prepared and melted at a spinning temperature of 328 ° C. The molten polyphenylene sulfide was discharged using a spinning mouthpiece (L / D = 0.4 mm / 0.37 mm) having two pores at a discharge rate of 13 dtex after drawing. The discharged polyphenylene sulfide yarn is cooled by a uniflow type cooling device to obtain an undrawn yarn, and then an emulsion oil is applied, and the undrawn yarn is not once wound up but is subjected to a drawing step and a relaxing step. It was wound on a bobbin with a winder to obtain a fiber package consisting of a 13 dtex polyphenylene sulfide monofilament. In the drawing step, the yarn is first wound on an unheated pretension roll (speed 920 m / min), tension is applied between the next goded roll 1 (speed 940 m / min, 103 ° C.), and then the goded roll 2 (speed 920 m / min). Main stretching and heat setting are performed at a speed of 3110 m / min, 135 ° C., relaxed with Goded Roll 3 (speed 3100 m / min, unheated) as a relaxing step, and winder (speed 3100 m / min) with a winding tension of 0.3 cN / dtex. It was rolled up at min). The bobbin shape was a pan shape with a tapered end face, with a winding width of 200 mm, a taper angle of 60 °, and a twill angle of 1 °.

[Comparative Examples 7 and 8]
A fiber package was obtained in the same manner as in Example 1 except that the winding width was changed to 70 mm and 300 mm.

[Example 5]
A fiber package was obtained in the same manner as in Example 1 except that the winding speed was adjusted and the winding tension was 1.2 cN / dtex and the twill angle was 1.2 °.

[Comparative Examples 9 and 10]
An attempt was made to wind the bobbin in the same manner as in Example 1 except that the winding speed was adjusted and the winding tension was changed to 0.05 cN / dtex and 0.65 cN / dtex.

[Comparative Examples 11 and 12]
A fiber package was obtained in the same manner as in Example 1 except that the oil and fat adhesion rate to the yarn was changed to 0.1% by mass and 0.6% by mass.

Table 1 shows the production conditions, yarn characteristics, and the results of each evaluation of the polyphenylene sulfide monofilaments of Examples 1 to 5 and Comparative Examples 1 to 12.

Breaking strength, breaking elongation, 5, 10% modulus and other physical properties, bobbin shape, winding tension during winder winding, winding such as oil and fat adhesion rate to threads, winding width, taper angle, twill angle, etc. The monofilament of the fiber package of the polyphenylene sulfide monofilament obtained from Examples 1 to 5 obtained by controlling the winding conditions can be produced by the direct spinning and drawing method, and is a high-strength, low-knot, high-quality monofilament. there were. These fiber packages have a good winding shape, do not have shape defects such as tightening and collapse, have good unwindability, and have a good heat shrinkage stress ratio of the innermost and outer layers, and are uniform and of high quality. It was a good one. In addition, the mesh woven fabric obtained from the polyphenylene sulfide monofilament wound in a pan-shaped package with a tapered portion does not generate scum, does not generate vertical and horizontal thread breakage, and is due to sink marks and other factors in appearance. It was of good quality with no streaks, thick threads, abnormal gloss, etc. Further, the strength was sufficient, the dimensional stability was good, the durability as a filter was high, and the quality was good.
Among them, in Examples 1 and 5, a polyphenylene sulfide mesh woven fabric having good fiber physical characteristics, no sink marks, streaks, etc., and particularly excellent performance was obtained.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 1 in which the fiber package is a drum type and has a large twill angle is thought to be due to the drum type and the twill angle of 5 °, but the traverse movement speed is high. As a result, the threads were easily washed out by the momentum, and twilling was likely to occur, resulting in a package with poor thread unraveling. Due to the poor unresolvability from the package during weaving, streaks and thread breaks occurred, resulting in poor quality. It seems that this was accompanied, but the mesh performance was not very good.
It is considered that the fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 2 in which the fiber package is a drum type is a drum type. It became a package with poor susceptibility. The weavability was a little poor from the bobbin, so streaks and thread breaks occurred, resulting in poor quality. It seems that this was accompanied, but the mesh performance was not very good.
It is considered that the fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 3 of the Pan type, in which the fiber package is close to the drum type, is close to the drum type. , It became a package with a little poor unraveling property of the thread. The weavability was a little poor from the bobbin, so streaks and thread breaks occurred, resulting in poor quality. Along with that, the mesh performance was not very good.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 4 having a very small taper angle has a good winding shape, but the taper angle is low, so that a sufficient amount of winding cannot be wound, resulting in poor cost and production. It became inefficient. For this reason, since the amount of winding is small during weaving, knots are mixed in the yarn joint due to bobbin switching and the work efficiency is lowered.
In the fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 5 in which the twill angle was very small, streaks due to the bobbin were generated in the center of the surface on the surface of the winding bobbin, and continued to be generated during winding. As a result, the appearance was poor and the unresolvability was a little poor. For this reason, streaks and thread breaks occur during weaving, resulting in poor quality. The mesh performance was also not very good.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 6 having a large twill angle had a slight twill drop in the tapered portion, resulting in a package having poor yarn unraveling property. For this reason, some streaks and thread breaks occur during weaving, resulting in poor quality. The mesh performance was also not very good.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 7 in which the winding width of the package is small has a good winding shape, but the winding width is low, so that a sufficient winding amount cannot be wound, resulting in high cost and high production efficiency. It got worse. For this reason, since the amount of winding is small during weaving, knots are mixed in the yarn joint due to bobbin switching and work efficiency is reduced. The mesh performance was good.
The polyphenylene sulfide monofilament fiber package obtained from Comparative Example 8 in which the winding width of the package is large has a good winding shape, but sink marks are likely to occur when the innermost layer is unwound, and streaks are generated in the mesh fabric after weaving. However, it became a poor quality one.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 9 having a high winding tension to the winder has a 10% modulus increase due to the high winding tension, and when 1 kg or more is wound, the fiber package is tightened to the winder. The fiber package could not be collected. Further, the heat shrinkage stress ratio of the innermost and outer layers was greatly collapsed, resulting in a poor quality monofilament.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 10 having a low winding tension on the winder has a low winding tension, which causes the yarn to loosen between the GR3 and the winder, making it difficult to wind the fiber package on the winder. Could not be collected.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 11 having a low oil / fat adhesion rate to the yarn has a low oil / fat adhesion rate, so that the yarn breaks due to the yarn swinging on the goded roll occurred. In addition, the threads unwound from the fiber package generate static electricity, which reduces the passability of the weaving process. Along with that, the mesh performance was also not very good.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 12 having a high oil-and-fat adhesion rate to the yarn has an appearance in which the yarn wound on the bobbin becomes slippery, causing the yarn to fall from the taper portion. It became defective. In addition, the bobbin had poor unresolvability, and streaks, thread breaks, and scums occurred during weaving, resulting in poor quality. Along with that, the mesh performance was also not very good.

As described above, the fiber packages of the polyphenylene sulfide monofilaments obtained from Examples 1 to 5 do not have tightness, insufficient winding amount, weft threads, and twill drop, and the innermost and outer layers have little variation in product, and are used during weaving. There was no thread breakage during unraveling, and there were almost no sink marks or streaks, reed scraping, scum, or thread breakage due to unraveling during weaving, and it was a high-quality product with combined strength. The obtained mesh woven fabric before and after processing has almost no abnormal appearance such as streaks due to misalignment or sink marks, has excellent dimensional stability, and has strength, so it can be used for high-performance filter applications. It was of dignity.

Claims (7)

A fiber package in which a polyphenylene sulfide monofilament whose main constituent unit is a p-phenylene sulfide unit is wound on a pan-shaped bobbin. The winding width is 100 to 250 mm, the taper angle is 30 to 140 °, and the twill angle is 0.8 to 2. A polyphenylene sulfide monofilament fiber package having a thermal shrinkage stress ratio of 0.85 to 1.15 for the innermost and outer layers. The fiber package according to claim 1, wherein the polyphenylene sulfide monofilament has a fineness of 6 to 35 dtex. The fiber package according to claim 1 or 2, wherein the polyphenylene sulfide monofilament has a breaking strength of 3.4 cN / dtex or more and a breaking elongation of 24 to 40%. The fiber package according to any one of claims 1 to 3, wherein the 5% modulus is 1.0 to 1.8 cN / dtex and the 10% modulus is 1.4 to 2.6 cN / dtex. A polyphenylene sulfide resin whose main constituent unit is a p-phenylene sulfide unit is melt-extruded, cooled and solidified, and then the obtained undrawn yarn is continuously drawn without being wound once, and the winding tension to the winder is 0.1 to 1. A method for producing a fiber package made of a polyphenylene sulfide monofilament by a direct spinning and drawing method in which a pan-shaped bobbin is wound at 0.5 cN / dtex. The fifth aspect of claim 5, wherein the fat and oil are attached to the obtained undrawn yarn so that the oil and fat adhesion rate of the polyphenylene sulfide monofilament is 0.15 to 0.45% by mass, and then the yarn is drawn and wound on a bobbin. A method for producing a fiber package consisting of a polyphenylene sulfide monofilament. A polyphenylene sulfide resin whose main constituent unit is a p-phenylene sulfide unit is melt-extruded, cooled and solidified, and then the obtained undrawn yarn is continuously drawn without being wound once and wound directly on a pan-shaped bobbin by a winder. A method for producing a fiber package made of polyphenylene sulfide monofilament by a spinning drawing method so that the oil / fat adhesion rate of the polyphenylene sulfide monofilament becomes 0.15 to 0.45% by mass before the undrawn yarn is wound on a bobbin. From a polyphenylene sulfide monofilament, which is characterized in that the bobbin is wound into a bobbin so that the winding width is 100 to 250 mm, the taper angle is 30 to 140 °, and the twill angle is 0.8 to 2 °. A method of manufacturing a fiber package.

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