JP3438322B2 - Polyester fiber, method for producing the same, and polyester continuous fiber woven fabric - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to a polyester fiber 維及 <br/> beauty its preparation and polyester filament fabrics.

[0002]

2. Description of the Related Art Polyester fibers have been widely used in addition to clothing applications due to their characteristics. Especially, supported by the recent boom of new synthetic fibers, the production volume is still increasing.

On the other hand, in order to improve productivity, labor saving due to labor shortage, and automation, a spinning direct drawing method (spin draw method) is adopted in which spinning is carried out without being wound once from the conventional two-step method of spinning and drawing. The production method is being actively changed to the: SPD) method. The production of fibers by this spinning direct drawing method has been expanded not only to the field of industrial materials such as fish nets such as rubber-reinforcing fibers, sewing threads, ropes and hoses, but also to the field of clothing.

In order to improve the productivity, the direct spinning / drawing method has recently reached a final winding speed as high as 6000 m / min or more.

[0005]

However, as the speed is increased, problems such as securing the heat setting time and increasing the difficulty of the winding technique occur, and the polyester fiber produced by the spinning direct drawing method is wound up. In this case, if the conventionally known winding conditions are adopted as they are, there is a problem that the quality is inferior to that of a yarn (burn yarn) obtained by a conventional spinning and drawing two-step method. For example, when polyester fibers produced by the spinning direct drawing method are used as warp yarns for long-fiber fabrics, the product bulges are insufficient compared to burn yarns, and only thin and poorly hand-held fabrics are produced, resulting in poor texture. There was a problem.

The object of the present invention is to solve the above-mentioned problems associated with speeding up, to allow polyester fibers obtained by the spinning direct drawing method to be wound up at high speed, and for warp and weft of long fiber woven fabric. When used for at least one of
It is an object of the present invention to provide a polyester fiber capable of obtaining a long fiber woven fabric having excellent texture and elasticity and a method for producing the same. Another object of the present invention is to provide a polyester continuous fiber woven fabric in which the above polyester fiber is used in at least one of warp and weft.

[0007]

DISCLOSURE OF THE INVENTION The inventors of the present invention have made a difference in the characteristics of the raw yarn and the texture between the yarn obtained by the conventional two-step spinning and drawing process and the polyester fiber obtained by the direct spinning process. As a result of diligent study, the difference in the shrinkage characteristics of the raw yarn is the main cause of the difference in texture, and even the fiber obtained by the direct spinning and drawing method has a specific structure and a specific shrinkage behavior. If it is a fiber, a long fiber woven fabric having an excellent texture can be obtained even under the same processing conditions as the fiber obtained in the conventional two steps. Further, if a fiber having a high single yarn denier is used as the above fiber, it is also elastic. It was found that an excellent long-fiber woven fabric can be obtained, and the present invention has been completed.

The polyester fiber obtained by the spinning direct drawing method for polyester long-fiber woven fabric according to the present invention has various physical properties such as intrinsic viscosity IVf 0.611 to 0.65 and heat shrinkage stress. Peak stress ^σ _max 0.35 to 0.47 g / d, boiling water shrinkage SHW 12 to 18 %, heat shrinkage characteristic value RSH16 3 to 6 %, and single yarn denier dpf 5 to 6 d It is what Here, the thermal shrinkage characteristic value RSH16, under 0.99 ° C. 10% relaxed fiber, shows the 160 ° C. dry heat shrinkage after the heat treatment of 5 seconds.

Polyester fiber according to claim 2
The manufacturing method of polyester fiber
A method for manufacturing fibrous material, which comprises spinning a melted polymer into a spinneret.
Discharge from the yarn, cool and solidify the discharged yarn, and apply oil to this yarn.
Is applied, and the take-up speed is 1500 to 3 by the take-off roller.
Take-off at 500m / min, 70-1 yarn after take-up
Heat to 00 ° C., draw heated yarn, 70-90
Heat set at ℃ for 0.01-0.1 seconds, then heat set
The yarn temperature to the glass without relaxing the orientation of the formed yarn.
It is characterized by being wound up after cooling below the transition point.
is there. Polyester long-fiber fabric according to the invention of claim 3
At least one of the warp and the weft, according to claim 1.
Characterized by the fact that polyester fibers are used
It is a thing. Hereinafter, the present invention will be described in detail. In the present invention, the polyester-based fiber is a fiber having an ethylene terephthalate unit as a main repeating unit, and specifically, a fiber made of polyester in which 80 mol% or more of all constituent units are ethylene terephthalate units. In particular, the main target is polyethylene terephthalate produced from terephthalic acid or its functional derivative and ethylene glycol or ethylene oxide, but in addition to terephthalic acid or its functional derivative as the acid component, the total amount of the acid component is the standard. Less than 20 mol%, preferably 10
Less than mol% of isophthalic acid, adipic acid, sebacic acid,
Azelaic acid, naphthalic acid, p-oxybenzoic acid,
2,5-dimethyl terephthalic acid, bis (p-carboxyphenoxy) ethane, 2,6-naphthalenedicarboxylic acid, 3,5-di (carbomethoxy) benzenesulfonate or functional derivatives thereof, and / or In addition to ethylene glycol as the glycol component, less than 20 mol%, preferably less than 10 mol% of diethylene glycol, propylene glycol, 1,4-butadiol, 1,4-hydroxymethylcyclohexane or other dihydric alcohol based on the total amount of the glycol component. It may be a copolymer produced by adding. Further, for example, a copolymer to which an aromatic polyphosphonate for imparting flame retardancy is added may be used. Further, an antioxidant, a matting agent, a coloring agent, a dyeability improving agent, a flame retardancy improving agent, an antistatic agent, etc. can be added to these polymers.

[0010] describes various physical properties of the polyester fiber. First, the intrinsic viscosity of polyester fiber I
Vf is 0.611 to 0.65. IVf is 0.6
Beyond that, the spinning operation requires a higher temperature than during melt spinning becomes considerably difficult, production of other Me good good quality of the fiber becomes difficult. Preferably, the intrinsic viscosity IVf is ≦
It is 0.62.

[0011] In addition, the peak stress of heat shrinkage stress of the fiber ^σ
_max is 0.35 to 0.47 g / d. ^σ _max
There is less than 0.35g / d, it is impossible to obtain a texture by the width purse, which is a feature of the fabric, it intends island become a poor fabric of a hand-held feeling.

[0012] In addition, boiling water shrinkage SHW of fiber, 12 to
18 %. The SHW is less than 12 percent, textile length, first in length, such as width purse particularly relaxing process, insufficient shrinkage in width purse is needed process, to become the texture of poor textile <br/> or cormorant.

[0013] In addition, the thermal shrinkage characteristic value of the fiber RSH16
Is 3 to 6 %. Usually, to finish the fabric,
For example, it goes through each process of relaxing → preset → weight reduction → dyeing → finishing, but it is necessary to control each process to obtain the final length and width. this is,
This is to prevent troubles in the process such as wrinkles.
The heat shrinkage characteristic value RSH16 of the fiber is a measure for optimizing the behavior when passing through these processes. If this value is less than 3%, the final length and width are insufficient and the texture is poor. want intends to become a fabric.

[0014] is et al., Single yarn denier dpf of fiber, 5
~ 6 d. A woven fabric excellent in elasticity can be obtained by using fibers of 5 to 6 d single yarn denier for at least one of the warp and the weft. If the single yarn denier is less than 5d,
Want intends to become a poor fabric resilient.

[0015] show to the next, as the silk factories of'm Lupo Riesuteru-based fibers in spinning direct drawing method. The molten polymer discharged from the spinneret, cooled ejection Deitojo, solidified, oil applied to the yarn,引取Ru with take-up roller. At this time, in order to improve migration of the oil agent after applying the oil agent, it is possible to install an interlace to which substantially no entanglement is applied in order to improve migration of the oil agent. The yarn thus drawn is stretched without winding and heat set. Furthermore, without relaxing the orientation of the yarn, after cooling the the yarn temperature below the glass transition point, coiling Ru in some relaxation.

The rate at Ru take-off above Symbol take-up roller, so greatly affects the thermal shrinkage characteristic value RSH16 of fibers, it is necessary to set the rate at which the RSH16 3% or more. Then , the speed at which crystallization (orientation crystallization) occurs during spinning is desirable. From this point of view, the take-off speed is preferably 3500 m / min or less, more preferably 2800 m / min or less and 1500 m / min or more.
The range is good.

[0017] The thread Jo引 after up, prior to stretching, to grant <br/> heat to the yarn. Uneven dyeing to a heating temperature of this and the glass transition point or higher, it is necessary in terms of quality, proper heating temperature is 7 0
~ 100 ° C. At less than 70 ° C. Gataku draw point is fixed, also the yarn swing becomes large and dyeing unevenness of 100 ° C. over is exceeded and the roller, as well as deterioration of the quality, also unfavorably to an increase in yarn breakage.

Next, the heated yarn is drawn and heat set. Stretching is adjusted to obtain the required high elongation
Furthermore, it is adjusted to obtain the required shrinkage behavior. In particular,
Heat set is not only about temperature but also about time.
, 0 . It is desirable to apply for 01 to 0.1 seconds. If the time is less than this time, the quality such as uneven dyeing becomes poor. The heat setting temperature is preferably 70 to 90 ° C.

[0019] The the yarn temperature without orientation relaxation heat the set yarn to be below the glass transition point, is essential in order to obtain a high heat shrinkage stress. For this purpose, after the heat set rollers, further heating roller installed, the speed of the rollers is the same, the glass transition point the yarn temperature by the temperature of the installation roller set at a temperature below the glass transition point The following temperatures are used. Here, when the installation roller is not installed, or at a temperature exceeding the glass transition point , it is necessary to lower the tension for winding to adjust the shape of the package at the time of winding, so that the orientation relaxation is remarkably reduced. fibers of become high heat shrinkage stress is not be obtained.

Since the single yarn denier becomes thicker, in the conventional two-step method, twist accumulation occurs at the time of drawing and the number of yarn breakage increases, but this problem is solved by directly connecting spinning and drawing by the direct spinning method. Therefore, it is suitable for thick multifilament of single yarn denier.

[0021]

In the spinning direct drawing method , the final roller is usually a heating roller for the reason of securing a heat setting time, and
The temperature is set to be the highest compared to the other rollers. On the other hand, from the viewpoint of winding, taking into consideration the winding shape and tightening, the winding is performed with a relatively low tension. Therefore, usually, the winding speed is set lower than the speed of the final roller to control the tension. As a result, conventional spinning
The yarn obtained by the direct drawing method (SPD yarn) was substantially relaxed by the final roller, and the orientation of the amorphous portion was relaxed.

In the present invention, the orientation relaxation of the amorphous portion is eliminated to obtain a fiber having a high heat shrinkage stress, and a trouble occurs during the stretching which occurs in two steps (for example, the standing time is exceeded, a mistake in setting the twisting machine, etc.). ), And by controlling the shrinkage characteristics in the post-processing steps (particularly dyeing processing), it is excellent even under the same process conditions as the fibers obtained in the conventional two steps, even though it is a direct spinning method. It has a texture, or one resilient in excellent fabric can be obtained.

[0023]

EXAMPLES The present invention will be described in more detail below with reference to examples. In addition, the physical-property value in each Example and a comparative example was measured by the following method. <Intrinsic viscosity> It measures at 30 degreeC using the mixed solution of phenol / tetrachloroethane 60/40.

[0024] The peak stress ^sigma _max thermal shrinkage stress <peak stress ^sigma _max thermal shrinkage stress>, is measured by the following method, in the curve of the temperature-shrinkage stress, the highest stress value (peak stress) Say. Thermal stress measuring machine (eg S
II TMA / SS100) and a recording device linked to this are used for measurement. The sample to be measured has a total denier of 75
Alignment between chucks is 2 so that it falls within the range of ~ 125d.
Both ends are sandwiched so as to have a length of cm and set in a thermal stress measuring machine. While maintaining a constant length by applying an initial load of 1/30 g per denier to the sample, the temperature is raised from room temperature to 300 ° C. at a temperature rising rate of 20 ° C./min. The stress generated at this time is recorded and the maximum stress point (peak stress) is read.

<Boiling water shrinkage SHW> It is measured according to JIS-L1013.

<Heat Shrinkage Characteristic Value RSH16> Using a twisting machine or the like, the fiber is set to 1% under 10% relaxation.
After heat treatment at 50 ° C. for 5 seconds, the dry heat shrinkage ratio under dry heat at 160 ° C. is measured.

Next, each embodiment, the arrangement of rollers used in Comparative Example will be described with reference to FIG. 1 及 beauty Figure 2. Figure 1
In, (NZ) is spinneret, as viewed in the traveling direction of the yarn (1), the heating roller (GR1), the heating roller (GR2), the heating roller (GR 3), the winding roller (2) and the take Tori cheese (3) is arranged in this order. 2 is the same as FIG. 1 except that the heating roller (GR3) of FIG. 1 is not arranged.

[Examples 1 to 4] Polyethylene terephthalate having an intrinsic viscosity IVp = 0.635 was extruded at a spinning temperature of 280 ° C., and the roller arrangement shown in FIG. 1 was used.
5f finished yarn was obtained. Physical properties of the resulting yarn are shown in Table 2. Next, the obtained fiber and 30d / 18f self-expanding yarn are mixed and added with a twist of 500 T / m, and then glued,
The warp was warped. A strong twist yarn of 75d / 72f is used as a weft, and it is used as a raw material. Relaxed under heat of 120 ° C, 190
After presetting under dry heat at 0 ° C. and dyeing by weight loss, finishing processing was performed to obtain a woven fabric. Weft density, texture,
Elasticity is also shown in Table 2.

[Comparative Examples 1 to 4] With the arrangement of the rollers shown in FIG. 1, the conditions were changed as shown in Table 1 and the conditions were changed to 30 d / d.
5f finished yarn was obtained. Physical properties of the resulting yarn are shown in Table 2. Next, a woven fabric was obtained from the obtained fibers in the same manner as in the example. Table 2 also shows the weft density, texture and elasticity of this woven fabric.

[Comparative Examples 5 and 6] With the arrangement of the rollers shown in FIG. 2, the conditions were changed as shown in Table 1, and the conditions were changed to 30 d / d.
5f finished yarn was obtained. Physical properties of the resulting yarn are shown in Table 2. Next, a woven fabric was obtained from the obtained fibers in the same manner as in the example. Table 2 also shows the weft density, texture and elasticity of this woven fabric.

In each of the polyester fibers obtained in Examples 1 to 4, the intrinsic viscosity IVf , the peak stress ^σ _max of the heat shrinkage stress, the boiling water shrinkage SHW, and the heat shrinkage characteristic value R were obtained.
SH16 has excellent Property values of 及 beauty single yarn denier dpf, polyester filament fabrics produced from the fibers,
It has an excellent texture as well as excellent elasticity.
On the other hand, all of the polyester fibers obtained in Comparative Examples 1 to 6 have ^σ _max , SHW, RSH16,
Since the inferior to any of the physical properties of 及 beauty single yarn denier, polyester filament fabrics produced from the fibers,
It is inferior in texture and elasticity.

[0032]

As described above, the polyester fiber of the present invention has an intrinsic viscosity IVf and a peak stress ^{σ of} heat shrinkage stress.
_max , boiling water shrinkage SHW, heat shrinkage characteristic value RSH16
It is excellent in each physical property values of the 及 beauty single yarn denier dpf. Therefore, Der those polyester fibers were obtained by spinning direct drawing method of the present invention while seeking, from the fibers, even in the obtained fiber and the same process conditions in a conventional two-step method, it has excellent texture, or one resilient excellent polyester filament fabrics may be produced. Thus, according to the present invention, the spinning
High productivity of polyester fiber by yarn direct drawing method ,
The polyester long-fiber woven fabric obtained therefrom can be compatible with the quality.

[0033]

[Table 1]

[0034]

[Table 2]

[Brief description of drawings]

1 is a diagram showing the arrangement of a roller used in Examples 1-4 及 beauty Comparative Examples 1-4.

FIG. 2 is a diagram showing the arrangement of rollers used in Comparative Examples 5 and 6.

[Explanation of symbols]

(NZ) ... Spinneret (GR1)… Heating roller (GR2)… Heating roller (GR3)… Heating roller (1) ... yarn (2)… Winding roller (3)… Rolled cheese

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 62-110914 (JP, A) JP 62-191511 (JP, A) JP 3-167341 (JP, A) JP 1- 292113 (JP, A) JP 7-216643 (JP, A) JP 7-70821 (JP, A) JP 5-106114 (JP, A) JP 58-220815 (JP, A) JP-A-2-139409 (JP, A) JP-A-6-116811 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D01F 6/62 301-308

Claims (3)

(57) [Claims] 1. Direct spinning of polyester filament fabrics
Polyester fiber obtained by the elongation method , wherein the physical properties of the fiber are: intrinsic viscosity IVf 0.611 to 0.65 , peak stress ^σ _max of heat shrinkage stress 0.35 to 0.47 g / d, Boiling water shrinkage SHW 12 to 18 %, heat shrinkage characteristic value RSH16 3 to 6 %, and single yarn denier dpf 5 to 6 d, polyester fiber, wherein heat shrinkage characteristic value RSH16 is 10% fiber
The dry heat shrinkage ratio at 160 ° C. after heat treatment at 150 ° C. for 5 seconds under relaxation is shown. 2. A method for producing a Yorupo Riesuteru fiber spinning directly drawing method, a spinneret molten polymer
Discharge from the yarn, cool and solidify the discharged yarn, and apply oil to this yarn.
Is applied, and the take-up speed is 1500 to 3 by the take-off roller.
Take-off at 500m / min, 70-1 yarn after take-up
Heat to 00 ° C., draw heated yarn, 70-90
Heat set at ℃ for 0.01-0.1 seconds, then heat set
The yarn temperature to the glass without relaxing the orientation of the formed yarn.
It is characterized in that it is wound up after cooling below the transition point,
Method for producing ester fiber . To 3. At least one of the warp and weft, characterized in that the polyester fiber according to claim 1 Symbol placement is used, polyester filament fabrics.