JPS6059120A - Modified polyester filament yarn for embroidery yarn and machine sewing thread - Google Patents

Abstract

PURPOSE:The titled filament yarns, obtained by using a copolymer of an isophthalic acid component containing a metallic sulfonate, having a specific intrinsic viscosity, strength, elongation and dye shrinkage after twisting, and capable of giving yarns having dyeing processability, sewability and providing processed products having improved appearance quality. CONSTITUTION:Modified polyester filament yarns, obtained by melt spinning polyethylene terephthalate containing 3.5-6.5mol% copolymerized isophthalic acid component containing metallic sulfonate groups, and drawing the resultant filaments, and having 0.35-0.45 intrinsic viscosity. The resltant yarns have 2.0- 3.5g/denier strength, 20-35% elongation, <=(1/10) of the above-mentioned elongation at (1/3) tenacity at break and 1.6-6.4% dye shrinkage after twisting. The cross-sectional shape of the filaments is preferably tri--pentalobed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a modified polyester filament used as a yarn for embroidery sewing thread. More specifically, the present invention relates to a modified polyester filament for producing an embroidery machine thread with excellent dyeing processability, and which improves the sewability, workability, and embroidery performance of the embroidery machine thread produced from the filament. The present invention relates to a modified polyester filament for producing embroidery sewing thread which has excellent appearance quality and durability of processed products. The embroidery machine thread referred to in the present invention is an embroidery machine thread used for machine embroidery such as single-head machine embroidery, multi-head machine embroidery, and sew-free embroidery.

Specifically, embroidery for the purpose of identification such as patches, epaulets, cap badges, names, blacks, dresses, blazers, etc.
Embroidery for clothing such as coats and underwear, wall materials, wall hangings,
Decorative embroidery for chair upholstery, chair covers, table cloths, table centers, futon covers, seat cushion covers, etc., shoes, bags, hats, neckbands, towels, cookies 7
This is an embroidery machine thread used for embroidery on personal items such as clothes.

[Prior art and its problems]

Conventionally, natural fibers such as silk and cotton, and recycled fibers such as rayon and polynosic have been used as raw threads for embroidery sewing threads, and rayon has been mainly used from the viewpoint of the appearance quality of embroidered products. However, when using embroidery sewing thread made of natural fibers or recycled fibers, there are the following problems: - Due to low strength and large strength variations, shock breakage occurs during embroidery processing, reducing the operability of embroidery processing. The embroidery products have low strength, so if worn or washed, the threads will fray and break, resulting in poor durability; they are water-absorbent; they shrink when exposed to water from rain or washing, and the embroidery process There are disadvantages such as the appearance of wrinkles on the surface and poor appearance quality.

As a means to solve these drawbacks, methods using polyester synthetic fibers, particularly polyethylene terephthalate filaments, have been studied. Although the above problems were solved by using this polyethylene terephthalate filament, the following new problem occurred.

The first problem is that polyethylene terephthalate filament cannot be dyed in deep colors unless it is at a high temperature of 120 to 140 degrees Celsius, and in order to obtain embroidery thread, embroidery machine thread (produced thread) must be dyed with a high-pressure dyeing machine. That's true. This high-pressure dyeing machine has to be maneuverable.
The operability (dying processability) of the dyeing process for obtaining embroidery sewing thread is greatly reduced. Industrial embroidery is usually carried out using a wide variety of embroidery machine threads with different colors ranging from several f to 107 units.
Since there are hundreds of types of embroidery machine threads with different colors, it is impossible to keep all of them on hand at the embroidery processing site. Therefore, in order to carry out embroidery on an industrial scale, a dyeing machine must be kept close to the embroidery processing site, and embroidery machine threads must be produced in different colors for each production. Therefore, if a dyeing machine with limited rotational speed has to be used in the dyeing process, the operability of the dyeing process will be greatly reduced. Currently, the embroidery industry mainly uses rayon, which can be dyed under pressure, as the thread for embroidery, so the only dyeing machine available is a pressure dyeing machine. Unfortunately, polyethylene terephthalate filament, which cannot be dyed without an expensive high-pressure dyeing machine, requires new equipment to be used as thread for embroidery, so it is currently not accepted by the embroidery industry.

The second problem is that the thread strength of polyethylene terephthalate filaments is too high, resulting in poor embroidery workability.

Normally, in embroidery processing, when starting the embroidery process, the upper thread of the sewing machine and the lower thread of the sewing machine become intertwined and the sewing machine lower thread is intertwined, so that the needles can move smoothly.In order to prevent the needle thread from intertwining with the lower thread of the sewing machine, an excessive amount of the upper thread of the sewing machine is pulled out from the sewing machine upper thread bobbin in advance and fixed near the embroidery surface. After forming 5 to 6 stitches, the embroidery can proceed while removing the sewing machine needle thread that has been pulled out excessively at the beginning of the embroidery. If the sewing machine needle thread that has been pulled out excessively is fixed and remains for a long time, it will cause tension on the embroidery surface as the embroidery frame moves, causing misalignment of the embroidery machine thread and preventing needle movement. This can lead to sewing machine needle thread breakage. Therefore, this excessively drawn out needle thread of the sewing machine becomes unnecessary thread and must be removed immediately. Normally, this removal work is done by cutting with bare hands. If it is not possible to cut with bare hands, the embroidery machine must be stopped and the removal work done using a knife, which would interfere with the embroidery process. Sexuality decreases.

By the way, polyethylene terephthalate filament is usually 5. Since it has a strength greater than Or/d, removing unnecessary threads with bare hands during embroidery will inevitably damage your hands. Therefore, when polyethylene terephthalate filament is used as a raw thread for embroidery light, embroidery processability deteriorates. In order to solve this problem, a method of using polyethylene terephthalate filament with lower strength has been considered, but lowering the strength increases elongation and causes skipped stitches and thread breakage during embroidery processing, resulting in a decrease in sewability. .

The sixth problem is that polyethylene terephthalate filaments can only be dyed with disperse dyes for polyester, making it impossible to obtain embroidery threads with clear hues and deep tones. As is clear from the intended use, embroidered products are required to have a luxurious atmosphere and a glamorous appearance, and to achieve this, it is necessary to use embroidery sewing thread with clear hues and deep tones. be.

Therefore, polyethylene terephthalate filaments, which cannot produce embroidery sewing threads having such hues and tones, are unsuitable as raw threads for embroidery lights.

Therefore, in order to solve the above-mentioned problems, the present inventors investigated a method using polyester filaments copolymerized with a large amount of 5-sodium sulfoisophthalic acid component so as to enable normal pressure dyeing. However, JP-A-53
When a polyester filament copolymerized with a 5-sodium sulfoisophthalic acid component so as to be dyeable under normal pressure obtained by the method shown in Japanese Patent No. 55022 is used as a yarn for embroidery machine thread, When dyeing cheese, the difference in dyeing between the inner layer and the outer layer is large, resulting in poor dyeing processability, and when embroidered products are ironed, embroidery wrinkles occur, resulting in poor appearance quality.

Therefore, the present inventors investigated the copolymerization amount, intrinsic viscosity, strength, elongation, and
Modified polyester filament i. has properties suitable for use as a yarn for embroidery lights by setting the elongation under a T-load with high cutting strength and the dyeing shrinkage rate after twisting within specific ranges.
The present invention was achieved by discovering that the following can be obtained.

[Purpose of the invention]

゛ An object of the present invention is to provide a modified polyester filament with excellent dyeing processability, and to improve the sewability of an embroidery sewing thread produced from the filament in embroidery processing.
It is an object of the present invention to provide a modified polyester filament for producing embroidery sewing thread which is excellent in workability, appearance quality and durability of embroidered products.

[Structure of the invention]

In the present invention, 6.5 to 6.5 mol% of isophthalic acid components containing metal sulfonate groups are copolymerized, and the intrinsic viscosity is 0.
A modified polyester fiber having a molecular weight of 65 to 0.45,
Modified polyester for embroidery machine thread, characterized in that the elongation at a strength of 2.0 to 3.5 is 1 or less of the above elongation, 0 after twisting, and the dyeing shrinkage rate is 1.6 to 6.4%. It is a filament.

The polyester constituting the modified polyester filament of the present invention is a polyester containing ethylene glycol as the main glycol component and terephthalic acid or its ester as the main dicarboxylic acid component. A part of this dicarboxylic acid component is replaced with a dicarboxylic acid component other than the isophthalic acid component containing a metal sulfonate group, such as isophthalic acid, diphenylcarboxylic acid, glutaric acid, naphthalene dicarboxylic acid, adipic acid, within a range that does not impair the effects of the present invention. , dicarboxylic acids such as sebacic acid, dodecanoic acid, and azelaic acid or their esters; oxycarboxylic acids or their esters such as p-oxybenzoic acid and p-β-oxethoxybenzoic acid; A portion of the 1,4-cy! Glycols such as lohexanedimethanol, diethylene glycol, triethylene glycol, propylene glycol, tetraethylene glycol, neopentyl glycol, 1,4-cyclohexanediol, and bisphenol A1 polyalkylene glycol may be used instead. Furthermore, it is also possible to use a small amount of a chain branching agent such as pentaerythritol, trimethylolpropane, trimellitic acid, trimesic acid, etc. in the polyester as long as the effects of the present invention are not impaired. Furthermore, in the synthesis of the modified polyester of the present invention, catalysts, color inhibitors, ether bond by-product inhibitors such as alkali metal salts, antioxidants, matting agents such as titanium dioxide, flame retardants, etc., which are well known in the art, may be used. can be used as appropriate. In particular, alkali metal salts are preferably used because they have the effect of suppressing by-products such as diethylene glycol. The isophthalic acid component containing a metal sulfonate group (hereinafter referred to as S component), which is a copolymerization component in the present invention, is a compound represented by the following formula, and specifically, dimethyl (5-sodium sulfo) isophthalate, bis -2-hydroxyethyl (5-sodium sulfo) isophthalate, bis-4-hydroxybutyl (5-sodium sulfo) inophthalate, dimethyl (5-lithium sulfo) isophthalate, and the like.

03M [However, M represents an alkali metal such as Na or Li1,
A, A' is H, an alkyl group or -(CH2) n O
H, and n represents an integer of 2 or more. ] Preferred S components include dimethyl (5-storium sulfo) isophthalate, bis-2-hydroxyethyl (5
-Sodium sulfo)inophthalate. S
The ingredients are 5. for the obtained polyester filament.
It is necessary to copolymerize 5 to 6.5 mol%, and 4.
0 to 6.0 mol% is more preferable. If the copolymerized amount of the S component is less than 6.5 moles, the modified polyester filament cannot be dyed in a sufficiently deep color, and embroidery sewing thread cannot be made using an atmospheric dyeing machine. On the other hand, if the copolymerization amount of the S component exceeds 6.5 mol%, the physical properties of the polyester filament, especially the heat resistance, will deteriorate, resulting in thread breakage during stretching, and the embroidery machine will not be able to handle the needle heat during embroidery processing. The thread deteriorates and breaks during the embroidery process, reducing sewability. It is necessary that the intrinsic viscosity 1d of the modified polyester filament in the present invention is 0.35 to 0.45. If the intrinsic viscosity is less than 0.35, the elongation of the resulting polyester filament will be lower than 2.0 g/d when the elongation is 20% or more, and if the intrinsic viscosity is higher than 0.45, the elongation will be reduced to 35%. When the strength is set below, the strength becomes higher than 3.5 P/d, and the objects and effects of the present invention cannot be achieved. It is necessary that the strength of the modified polyester filament in the present invention is 2.0 to 6.5 f/d. If the strength is less than 2.0 g/d, the embroidery sewing thread made from the filament will break during the embroidery process, resulting in poor stitchability during the embroidery process, and the embroidery thread may still be damaged due to wear and washing. The product becomes fluffy and the threads break, resulting in poor durability. On the other hand, if the strength exceeds 6.5 f/d, when performing embroidery using embroidery machine thread made from the filament, it is impossible to remove unnecessary thread at the beginning of embroidery without damaging the bare hands. . Unfortunately, it is necessary to temporarily stop the embroidery machine and use scissors to remove unnecessary threads, which reduces the operability of the embroidery process. The elongation of the modified polyester filament in the wood invention must be 20 to 65%, and the elongation is 20 to 65%.
~60% is more preferred. If the elongation is less than 20%, fluff and thread breakage will occur during drawing, resulting in a marked decrease in yarn reeling operability, and the embroidery sewing thread obtained from the filament will break due to shock during embroidery, making it difficult to sew the embroidery process. Sexuality decreases. On the other hand, if the elongation exceeds 35%, the embroidery sewing thread obtained from the filament will be greatly elongated as the sewing machine needle descends during the embroidery process, so that it will form when the sewing machine needle moves from the bottom dead center to the upward direction. The shape of the needle thread loop of the sewing machine becomes unstable, and - in headstand sewing machines and multi-head sewing machines, it becomes difficult for the tip of the shuttle to which the sewing machine bobbin thread is attached to catch the sewing machine needle thread loop. It becomes difficult for the shirt with the attached thread (thread) to pass through the thread loop of the sewing machine.

As a result, skipped stitches and thread breakage occur during embroidery, resulting in poor sewability during embroidery. It is necessary to be less than one of the modified polyester filaments in the wood invention. If the elongation at the cutting force of 0 1 τ load is larger than the elongation before, when embroidery is performed using embroidery thread obtained from filament, the embroidery thread will rise in a bowed shape from the surface of the embroidery base fabric. The embroidery machine threads become disarrayed on the embroidered product, resulting in a deterioration in the quality of the appearance of the embroidered product. For example, the penetration resistance of the sewing machine needle is high for fabrics with high weave density such as Rainco-1 fabric, medium-weight fabrics such as jeans and work clothes, and coated fabrics such as Hibaro/, Neop-V, and urethane. When a large piece of fabric is used as the embroidery base fabric, the embroidery sewing thread is sandwiched between the sewing machine needle and the base fabric at the needle hole, and is stretched greatly on the side that penetrates the base fabric. The embroidery sewing thread with a length comparable to this stretched length will remain as a slack thread on the embroidery surface side, and the elongation under one load of cutting force is one or more of the elongation. When used, a problem arises in that the embroidery sewing thread stands up from the surface of the embroidery base fabric in a bow-like shape. The dyeing shrinkage rate after twisting of the modified polyester filament in the present invention needs to be 1.6 to 6.4%, and if the dyeing shrinkage rate after twisting is less than 1.6%, the polyester filament When dyeing cheese after twisting, the tightness of the cheese due to shrinkage during dyeing is too small, so when the dyed cheese is pulled up from the dye solution, the dyed cheese often falls off the bobbin and the twisted threads often fall off the surface of the cheese. For this reason, the production yield of dyed cheese decreases, and the dyeing processability deteriorates. On the other hand, if the dyeing shrinkage rate after twisting exceeds 6.4%, a difference in dyeing will occur between the inner layer and the outer layer of the dyed cheese when the polyester filament is dyed with cheese after twisting. If the shrinkage rate of the polyester filament exceeds the upper limit of the present invention, the embroidery sewing thread obtained from the polyester filament will tend to stretch during the embroidery process, resulting in skipped stitches and thread breakage during the embroidery process, resulting in poor sewability during the embroidery process. descend. Furthermore, when the modified polyester filament of the present invention is twisted and has a dry heat shrinkage rate of 4% or less after dyeing, the embroidered product obtained from the filament is less likely to shrink when ironed. Since the embroidery is low, embroidery wrinkles do not occur on the surface of the embroidery base fabric, and the appearance quality is further improved, which is preferable. Furthermore, when the cross-sectional shape of the single fiber of the modified polyester filament of the present invention is set to a 6-5 lobe cross-section, the amount of light reflected on the surface of the embroidered product obtained from the polyester filament is increased, and the embroidered product has an excellent luster. This is preferable because it improves the quality of the embroidered product and improves the appearance quality of the embroidered product. In particular, a six-lobed cross section provides a mild luster similar to rayo silk. In addition, the single fiber fineness of the modified polyester filament of the present invention is 1.5 to 1.5.
A denier of 5 denier is preferable because it gives the embroidered product obtained from the polyester filament excellent gloss and appearance quality. If the single fiber fineness is less than 1.5 denier, light scattering on the surface of the embroidered product will become more difficult, resulting in a decrease in appearance quality, which is not preferable. The novel modified polyester filament for embroidery sewing thread of the present invention described above can be industrially advantageously produced, for example, by the following method. That is, a modified polyester having an intrinsic viscosity of 0.36 to 0.46 is produced by copolymerizing 6.5 to 6.5 mol% of an isophthalic acid component containing a metal sulfonate group, and this After drying the polyester under vacuum, it is melt-spun in a conventional manner. The obtained undrawn filament was heated to 70 to 100°C with a supply roller.
It is stretched to 1.4 to 3.2 times between the first stage stretching rollers at 0 to 140°C, and then the total stretching ratio is 2.2 to 3.2 times between the second stage stretching rollers at 200 to 230°C. Stretched so that
Perform a limited contraction of ~10%. The contact residence time of the second stage stretching roller is preferably 0.03 to 2 seconds.

Note that since the intrinsic viscosity usually decreases during melt spinning, the intrinsic viscosity of the polyester used to produce the modified polyester filament of the present invention is preferably set to 0.36 to 0.46.

〔Effect of the invention〕

(1) The modified polyester filament of the present invention contains an inophthalic acid component containing a metal sulfonate group of 6.5 to
Since it is copolymerized at 6.5 mol %, it is possible to dye a sufficiently deep color at a temperature of 100° C. or lower. Therefore, it is a polyester filament with improved dyeing processability that can be dyed using an atmospheric pressure dyeing machine with a small rotation speed, and can be used without introducing new equipment for the embroidery industry, where only an atmospheric pressure dyeing machine is always available.

(2) The modified polyester filament of the present invention contains an isophthalic acid component containing a metal sulfonate group of 6.5 to
Because it is copolymerized with 6.5 mol%, the filament can be dyed with basic dyes to produce clear hues and deep tones, and the embroidered products obtained from the filament have a luxurious atmosphere and splendor. It has a high quality appearance.

(3) Since the modified polyester filament of the present invention is hydrophobic, the embroidered product obtained from the filament does not shrink when wet with water, and no embroidery wrinkles occur on the surface of the embroidery base fabric. And the appearance quality is excellent. For this reason, it is ideal as a raw thread for embroidery when embroidering quick-drying clothing.

The filament has a thread strength of 2.0 to 3.5 g/d, and the embroidery thread obtained from the filament has excellent sewability without causing shock breakage during embroidery processing. Further, since unnecessary threads at the beginning of embroidery can be removed with bare hands during embroidery, the operability of embroidery is improved. In addition, the embroidered product has excellent durability because it does not become fluffed or break due to wear and tear due to washing.

(5) The modified polyester filament of the present invention has an elongation of 20 to 65%, and has good thread-spinning operation.The embroidery sewing thread obtained from the filament does not suffer from shock breakage during embroidery processing, and does not suffer from skipped stitches. It has excellent sewability in embroidery processing with less occurrence of thread breakage.

(6) The modified polyester filament of the present invention ■The following is obtained from the filament, and it does not lift up from the base fabric surface. , the appearance quality of embroidered products is excellent.

However, since the elongation is 20 to 35%, it has a cutting strength of 1.
Elongation under load (elongation at low load) is low. Normally, the tension applied to embroidery sewing thread during embroidery processing is approximately 7 loads, which is the strength of embroidery sewing thread. Difficult to stretch.

As a result, there are fewer skipped stitches and thread breakages during the embroidery process, and there is also less embroidery machine thread lifting from the embroidery base fabric surface during the embroidery process, which improves the sewability of the embroidery process and the appearance of the embroidered product. Excellent quality.

(Strength) The dyeing shrinkage rate of the modified polyester filament of the present invention after twisting is 1.6 to 6.4%, and the dyed cheese does not come off from the bobbin during cheese dyeing, and the inner and outer layers of the dyed cheese There is no difference in dyeing and processability is excellent.In addition, the elongation is 20 to 35%, and the elongation at the final load of cutting strength is less than 1 of the elongation. , This 0 The embroidery sewing thread obtained from the modified polyester filament of the invention is difficult to stretch during the embroidery process. Therefore, the elongation recovery (instantaneous recovery, delayed recovery) of the embroidery sewing thread after the embroidery process is small, and the embroidery machine thread after the embroidery process is The appearance quality of the embroidered product is excellent because embroidery wrinkles do not occur due to elongation recovery of the embroidery sewing thread that occurs when the embroidery frame is removed.

(8) Furthermore, by setting the dry heat shrinkage rate of the twisted yarn of the modified polyester filament of the present invention to 4% or less after dyeing, the embroidered product obtained from the filament will not touch the surface of the embroidery base fabric when ironing. Embroidery wrinkles are less likely to occur, and the appearance quality of the embroidered product is further improved.

(9) Furthermore, by making the modified polyester filament of the present invention have a single fiber cross section of 3 to 5 leaves, the embroidered product obtained from the filament has excellent luster, and has a more luxurious atmosphere and splendor. This further improves the appearance quality. In particular, a 6-leaf cross-section will give you a strong luster similar to rayon, while a 5-leaf cross-section will give you a silk-like mild luster.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

The method for measuring each characteristic value in the examples is as follows.

[Limiting viscosity]

The polyester or polyester filaments are dissolved in orthochlorophenol and the values are expressed as measured at 25°C.

[melting point]

Using Perkin-Eltr DSC-1B,
Using sample polyester 10cm, the temperature was raised from room temperature at a rate of 16°C/min in a nitrogen gas atmosphere. Using a constant speed extension type tensile tester, the sample length was 200y+on and the crosshead speed was 200m.
m/min, a tensile speed of 100%/min, and a chart speed of 200%/min. Strength is expressed as the value obtained by dividing the maximum strength by the denier before the reading test, and elongation is expressed as the value of elongation at the time of maximum strength. Expressed in degrees.

[Dyeing shrinkage rate after twisting]

Multifilament was used as a set of yarn (with a spindle rotation speed of 9600 rpm, number of twists (T = 60).
00/V stone (D is the total denier of the multifilament) and twist in the S direction. Two of the obtained twisted yarns were combined, and the spindle was rotated 7 times using an Itari complete yarn machine.
2 0 0 rprn, E ri number (T2) =
0. Twist the yarn in the Z direction at 8 2 X Tt and wind it around a bobbin to produce a single twisted yarn. The single twisted yarn wound around the bobbin is set in a fiber setter to prevent twisting for heat treatment in warm water at a temperature of 55° C. for 40 minutes.

The single twisted yarn of length to, which was measured by applying a load corresponding to the minus number of the denier of the single twisted yarn set to prevent twisting, was heated at 98℃ under no tension.
, 5% OWF at a bath ratio of 1:50 for 60 minutes, then taken out and left in standard atmosphere for 4 hours, and then applying the above load again and measuring the length Ll, the formula ( (to-t+)/4o) x 1o It is expressed as a profit value using o.

[Dry heat shrinkage rate after twisting and dyeing treatment]

Using the single-strand twisted yarn after twist fixing set obtained by the method of measuring the dyeing shrinkage rate after twisting in 1.
%owf at a bath ratio of 1:50 for 60 minutes. Then, it was taken out of the hot water and left in standard atmosphere for 4 hours, and a sample of length Ao, which was measured by applying a load of 0, which corresponds to the number of ± of the denier of a single-strand twisted yarn, was
After being left in air at 80°C for 20 minutes, taken out from the air and left in standard atmosphere for 3 hours, the above load was again applied and the measured length tl was calculated using the formula ((to-tl)/4
o ] x100 and expressed as a profit value.

[Stainability]

A cylindrical knitted fabric was made from the filament to be evaluated using a 27-gauge sock knitting machine, and mixed with 2% nonionic activator [Sandets G-900 (manufactured by Sanyo Kasei ■)] and 0.2% using a conventional method.
Scour by boiling for 5 minutes in boiling water containing Noda ash, then rinse with water and dry. The obtained tubular knitted fabric was treated with malachite green 10% owf, acetic acid 0.51 novl/L, acetic acid nose CJ, 2? Dyeing is carried out for 60 minutes with a hot aqueous solution at 98° C. in a bath ratio of 1:50 consisting of /l. Next, the dye concentration in the dyed residual liquid after pulling up this tubular knitted fabric is measured, and the dye exhaustion rate of the tubular knitted fabric is calculated.

[Sewability] Using an embroidery sewing machine controlled by a conopiture machine, Model BeatlO1 manufactured by Paldan Co., Ltd., the number of revolutions per minute was 6.
Stitch a rose pattern consisting of 7,250 stitches at a speed of 0.00 stitches/minute. In addition, the sewing machine needle is made by Organ D.
D K-5, #11 is used, and the embroidery base fabric is date 275P, which is a blend of 80% polyester and 20% cotton.
Use 7'yyz" medium weight work clothes fabric with a dense weave.The sewability is determined by repeating 5 times for each embroidery machine thread.
It is expressed as the total number of defects (thread breakage, skipped stitches) during 5 repetitions.

Example 1 150 kg of dimethyl terephthalate, 97 kg of ethylene glycol, 7502 lithium acetate dihydrate, 15 g of manganese acetate tetrahydrate, and antyl trioxide (5-sodium sulfo) inphthalate were added, and the mixture was heated from 140°C at atmospheric pressure to 2
The temperature was raised to 65° C. over 4 hours with stirring to complete the transesterification reaction.

Next, 6,567 ml of ethylene glycol slurry containing 150f (trimethyl phosphor) and 16% by weight of titanium dioxide was added, and then the pressure in the system was reduced to 500 mmHr, and 30 kg of ethylene glycol was distilled off. After that, the temperature was increased from 11℃ to 280℃ for 1.5 hours, and the pressure was reduced from 760 to 1171℃ over 11 hours, maintaining the reduced pressure below i,In. and 28
A polycondensation reaction was carried out at 0°C for 90 minutes. Table 1 shows the intrinsic viscosity and melting point of the polyester obtained. Next, each polyester was dried in vacuum, and the width of each knot was 0.1
6 holes, slit length 0.276 holes, [1 hole depth 0.60
Using a Y-hole mouthpiece, the discharge amount was 40 q/1 nin, the spinning temperature was 300°C, and the spinning speed was 1400? Melt spinning was performed at n/min. This undrawn yarn was drawn in two stages at a drawing speed of 60,077 Z/min using a supply roller and a second roll type drawing machine to obtain a drawn yarn of 110 denier and 36 filaments. At this time, the roller temperature is 92℃ for the supply roller,
The stretching roller was set at 120°C, the second stretching roller at 210°C, and the take-up roller at 25°C. In addition, the total stretching ratio was 2.5 times, and the stretching ratio between the supply roller and the first stretching roller was 1.74.
times, the stretching ratio between the first stretching roller and the second stretching roller is 1
．． 44 times more. The shrinkage rate between the second stretching roller and the take-off roller was still 4.5%.

Table 1 shows the properties and spinning properties of the obtained drawn yarn.

Note that the yarn spinning properties in Table 1 are yarn breakage during stretching when 100 undrawn yarns of i Kg volume are stretched.

It is expressed as the percentage of the number of drawn yarns that did not have defects such as single yarn breakage or fuzz.

Next, the dyeability of each drawn yarn was evaluated and the results are shown in Table 1.

As is clear from Table 1, Experiment Nos. 2 to 4, which satisfied the requirements of the present invention, had good spinning properties and dyeing properties. On the other hand, experiment number 1 is dimethyl (5-sodium sulfo)
Since the copolymerized amount of inphthalate is less than the range of the present invention, the dyeability is unsatisfactory and normal pressure dyeing is impossible. However, in Experiment No. 5, the copolymerization amount of dimethyl (5-sodium sulfo) isophthalate exceeded the upper limit of the present invention, and the spinning property was poor. Using these drawn yarns, the spindle speed was 9.60 Or
A first twisted yarn was prepared with a pm% twist number of 571 T/m and the twist direction being the S direction. The two first-twisted yarns were pulled together and twisted at a spindle rotation speed of 720 rpm and a twist number of 468 T/m so that the twist direction was in the Z direction to create a single twisted yarn, which was heat-treated in warm water at 55° C. for 40 minutes using a fiber setter. I did a set to prevent it from twisting.

Using a soft winder, 6601 windings of each of the twist-stopping set yarns were wound around dyed tubes at a winding density of 0.64. Soft-rolled dyed cheese is listed as i':l”m' in the specification.
C) No change in content) Attach to cheese dyeing machine and use Kayac
rylYellow 3GS 1.5%owf Bath ratio 1
: 30.98°C x 60 minutes to obtain embroidery/sewing thread.

An r*+ stitchability test was conducted using these embroidery sewing threads, and the results are shown in Table 2.

As is clear from Table 2 of Table 162, in Experiment No. 5, the copolymerized amount of dimethyl (5-sodium sulfo) isophthalate exceeded the upper limit of the present invention, and the purity was poor.

Example 2 The same procedure as in Example 1 was carried out except that the copolymerization amount of dinotyl (5-sodium sulfo)isophthalate was changed to 5.0 mol%, and the polycondensation reaction time was changed to achieve an intrinsic viscosity of 0.30. .0.4D, 0.4D, 0.51 polyesters were produced. Next, each of these polyesters was spun in the same manner as in Example 1 to obtain drawn yarn. The polymer properties, thread properties, and spinnability of the obtained polyester were evaluated in the sixth
Shown in the table. Embroidery sewing thread was obtained from the obtained drawn thread in the same manner as in Example 1, and its sewability was measured. The results are shown in Table 3.

As is clear from Table 6 below, Experiment No. 7.8, which satisfies the requirements of the present invention, had good yarn-spinning properties and sewing thread processability. On the other hand, in Experiment No. 6, the intrinsic viscosity of the thread was lower than the lower limit of the present invention, so the strength was lower than the lower limit defined by the present invention, and the thread workability was poor. In addition, in Experiment No. 9, the intrinsic viscosity of the thread exceeded the upper limit specified by the present invention, the 1 strength was higher than the upper limit specified by the present invention, and the workability of sewing thread processing was poor. The operability of sewing machine workability mentioned here means whether unnecessary threads at the beginning of the embroidery process can be cut with bare hands without damaging the thread during the sewingability test. It means no.

Example 2 Using the polymer of Experiment Nn7, yarn was produced in the same manner as in Example 1 except that the temperature of the second stretching roller was changed, and the dyeing shrinkage rate after twisting was 8.5%, 5. .5%%
Drawn yarns of 6.7% and 1.4% were obtained. Table 4 shows the properties of the drawn yarn obtained.

Reprint of the specification (no change in content) In addition, (4) The drawn yarn was twisted and dyed in the same manner as in Example 1.

Table 4 As is clear from Table 4, Experiment No. 11.12, which satisfies the requirements of the present invention, has good dyeability, but Experiment No. 10.12, which does not satisfy the requirements of the present invention, has good dyeability. No. 13 is inferior in dyeing processability.

In Experiment No. 13, the dyed cheese was smeared on the bobbin when the dyed cheese was pulled out of the dyeing solution, so it was judged that the dyeing processability was poor. Further, in Experiment No. 10, when the dyed cheese was visually judged, there was a difference in dyeing between the inner layer and the outer layer, so it was judged that the dyeing processability was poor.

Example 4 In Example 2, with the polymer of experiment Nn7.

A drawn yarn was obtained by spinning in the same manner as in Example 1, except that the shrinkage rate between the second stretching roller and the take-up roller was changed as shown in Table 5.

Table 5 shows the properties of the drawn yarn obtained. Using this drawn yarn, an embroidery sewing thread was obtained in the same manner as in Example 1.

Using this embroidery sewing thread, an embroidered product was obtained in the same manner as in the sewability test.

The embroidered products obtained from the drawn yarn of margin experiment Nn14 are as follows:
The embroidery sewing thread was floating above the surface of the embroidery base fabric, and the appearance of the embroidered product was poor. On the other hand, the appearance of the embroidered product obtained from the drawn yarn of Experiment N1115.16 was good.

Comparative Example 1 In Example 2, using the polymer of Experiment NCL7, the total stretching ratio was 2.8 times, the stretching ratio between the supply roller and the first stretching roller was 1.94 times, and the stretching ratio between the first stretching roller and the second stretching roller was Silk spinning was carried out in the same manner as in Example 1 except that the stretching ratio between the rollers was 1.44 times.

The yarn strength of the obtained polyester drawn yarn was 2.7y/ds
The elongation was 18%, and the spinning property was 76%, which was poor. An embroidery sewing thread was prepared from this drawn thread in the same manner as in Example 1, and its sewability was examined. The number of thread breaks was 8, indicating that the sewability was poor.

Comparative Example 2 In Example 2, using the polymer of Experiment 8, the total stretching ratio was 2.1 times, the stretching ratio between the supply roller and the first stretching roller was 1.6 times, and the stretching ratio between the first stretching roller and the second stretching roller was 1.6 times. Silk spinning was carried out in the same manner as in Example 1 except that the stretching ratio between the stretching rollers was 1.51 times.

The yarn strength of the obtained polyester drawn yarn was 2.4 fI/d.
, the elongation was 58%. Example 1
When we made embroidery thread using the same method as above and examined its sewability, we found that the number of skipped stitches was 6, indicating that the sewability was poor.

Patent Applicant Toshi Co., Ltd., Tesho Hizan L "Yen (Bandai) 11jlill! 39 U I 2 J'l"l fi
l CI Special 5'1 Agency Officer Ru Kazuhito Sugi 1, Indication of 'i'1 l Old 058 Year No. 1'1 Application No. 1667! ,->6r
32. Name of the invention: Modification for embroidery sewing machine thread (iPo January Sui) Lenor Ramen'1-3,? Person 1'1 and Gate 1 Series Q'5 n'l Applicant 〒1
03 11 Location Tokyo Chuo University 11 Honbashi Muromachi 2 J Lll
2 jnJ Demei Shin 1 store 1 Komei details 1'l % i'j
υsu11 ON+1'16, content of correction

Claims (3)

[Claims] (1) 6.5 to 6.5 mol% of isophthalic acid component containing metal sulfonate group is copolymerized, and the intrinsic viscosity is 0.65.
-0.45, the strength is 2.0 to 3.5 r/d, the elongation is ± or less of the elongation, and the dyeing shrinkage after twisting is 1.6 A modified polyester filament for embroidery sewing thread, characterized in that it has a content of ~6.4%. (2) The modified polyester filament for embroidery sewing thread according to claim (1), wherein the dry heat line penetration rate after the dyeing treatment of the twisted yarn is 4% or less. (3) The modified polyester filament for embroidery machine thread according to claim (1) or claim (2), wherein the cross-sectional shape of the single fiber is 3 to 5 lobes.