JPH03152231A - Machine sewing filament yarn and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject machine sewing yarn free of a twisted yarn structure and excellent in sewing under a high tension at a low cost by winding the yarn while carrying out fusion between synthetic fiber multi-filaments using low melting heat-adhesive filaments and subsequently dyeing the wound yarn. CONSTITUTION:(A) Synthetic fiber multi-filament yarns and (B) heat-adhesive filaments having a lower melting point than that of the component (A) are subjected to fluid-turbulence treatment to be collected. While fusion between the synthetic multi-filaments of the component (A) is subsequently carried out by continuous heat treatment using the component (B), the resultant yarn is wound around a dyeing cheese at 0.10-0.30 winding density. The wound yarn is subsequently dyed, thus obtaining the objective machine filament yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a filament sewing thread that does not have a twisted yarn structure, is non-torque, can be dyed at low cost, and is excellent in sewing under high tension, and a method for producing the same. It is something.

Conventional technology Sewing threads have traditionally been mostly made of natural fibers such as cotton and net, but in recent years synthetic fibers such as nylon and polyester have become mainstream. When these synthetic fibers are used for sewing thread, the filaments are usually twisted, and in order to make the entire sewing thread non-torque, after first twisting, first twisting and twisting are performed to balance the twist, and then heat setting is performed to create a torque. Some yarns have their expression suppressed, and some yarns are coated with a resin or the like after twisting.

However, these filament sewing threads are handled under high tension during sewing, and because they have a twisted structure, movement of the twist occurs, the torque is reproduced, and so-called fraying occurs, reducing sewing performance and resulting in uncut pieces. There are drawbacks that can be connected.

On the other hand, spun sewing thread made of synthetic fibers has a large number of fuzz and loops on the surface of the thread, so it fits well to the product to be sewn and there are few problems such as pulling out or movement, but it is destined to be used for mending and twisting. Therefore, the problem of torque buildup is unavoidable, and there are also drawbacks such as uneven strength in the yarn length direction.

In order to compensate for the above-mentioned drawbacks, spun-like filament sewing threads treated with a jet stream have recently been proposed.
Publication No. 839 discloses that one synthetic mat multifilament
A filament sewing thread is disclosed that is subjected to fluid agitation treatment in a feed overfeed state to mix fibers or form loops, and then is continuously heat set. It is true that the sewing threads produced by these methods are spun-like filament sewing threads due to the mixed fibers or loop configurations, but when exposed to high tension during sewing, they are subject to turbulent processing of one feed of fluid t$1. Since it is a filament sewing thread that is heat-set only, the fibers open in pieces, which naturally results in poor sewability. On the other hand, there are methods for improving the spreadability of filament sewing threads, such as JP-A No. 62-238839, JP-A No. 62-243842, and JP-A No. 62-257434.
No. 63-92744, synthetic fiber multifilament is divided into a core thread and a sheath thread, subjected to fluid agitation treatment in a two-feed overfeed state, and filament sewing thread that is continuously heated and heated is produced. Disclosed. However, although the loops of the sheath threads formed by the fluid agitation process are formed by mixing the core threads, the loops of the sheath threads may shift during sewing at high speeds and under high tension.
This has the disadvantage that it gets caught in the sewing machine needle hole, reduces sewing performance, and even ends up being uncut.

In addition, in the above proposal, when dyeing sewing thread,
The sewing thread is further wound into dyed cheese using a soft winder and then dyed using a dyeing machine. However, when dyed, the synthetic fiber multifilament shrinks under high temperature and high pressure, causing the entangled sewing thread to come apart due to the shrinkage, making it insufficiently suitable as a sewing thread. In addition, when turning dyed cheese using the soft winder mentioned above, it is necessary to
′:! Rubbing also leads to a decrease in the strength of the sewing thread and the opening of the interlaced thread, and the addition of the winding process also causes the formation of interribs in the threads.

Problems to be Solved by the Invention The present invention solves the above-mentioned problems, and therefore produces a filament sewing thread that does not deteriorate in sewing properties or remain uncut even when sewn under high tension, using a thread entangled by fluid agitation. The purpose is to

Means for Solving the Problems In order to solve the above problems, the filament sewing thread of the present invention has a synthetic fiber multifilament whose constituent filaments are bundled by fluid agitation treatment, and a thermal bond with a lower melting point than this synthetic fiber multifilament. It is characterized in that it is made of thermoadhesive filaments, and the low melting point thermoadhesive filaments are fused and dyed.

In addition, the method for producing filament sewing thread of the present invention involves subjecting a synthetic fiber multifilament and a heat-adhesive filament having a lower melting point than the synthetic fiber multifilament to a fluid agitation treatment, converging the constituent filaments, and then continuously heat-treating the filament. The synthetic fiber multifilament is fused with a low melting point heat-adhesive filament and wound around a dyeing cheese at a winding density of 0.10 to 0.30, and then dyed. .

The present invention will be explained in detail below.

The synthetic fiber multifilament in the present invention is made of polyamide, polyester, polyacrylonitrile, polyolefin, or the like. The thermoadhesive filament having a lower melting point than the synthetic fiber multifilament is one made of hot melt resin that can be produced into filaments by melt spinning, such as polyamide polyvinyl butyral, acrylic resin, polyester, ethylene-vinyl acetate, etc. Examples include polymers, ethylene-acrylic acid ester copolymers, polyurethane resins, etc., and these are used alone or as a mixture by adding rubber components such as butyl rubber and polyisobutylene, or natural resin rosin, etc. be done.

These low melting point thermoadhesive filaments may be selected depending on the type of synthetic fiber multifilament.For example, in the case of synthetic fibers made of nylon 6 or nylon 66, polyamide copolymer resins and polyurethane resins have a high affinity with the fibers. In particular, in the case of polyester fibers, polyester copolymer resins and ethylene-vinyl acetate copolymer resins are preferred.

In any case, a suitable heat-welding filament may be selected in consideration of #J melting temperature, adhesion, texture, and cost.

In the present invention, the mixing ratio of low melting point thermally adhesive filaments to the synthetic*m multifilament is 3 in terms of denier.
~30%, preferably 5-25%.

If the blend ratio of the low-melting-point thermoadhesive filament is 3% wood, the synthetic fiber multifilament cannot be sufficiently fused. If the blending ratio exceeds 30%, sufficient fusion can be obtained, but the texture after thermal bonding becomes hard, making it unsuitable for filament sewing thread.

The fluid disturbance treatment in the present invention means an air injection method,
The processing method will be briefly explained. That is, a synthetic fiber multifilament and a thermoadhesive filament with a lower melting point than the synthetic fiber multifilament are introduced from each feed roller into an air injection nozzle, and fluid disturbance processing is performed while overfeeding between them and a delivery roller. , synthetic fiber multifilament and low melting point thermoadhesive filament are entangled, intertwined and bundled, then continuously fed to a heating zone, overfeeded or underfeeded with a take-up roller to loosen or The low melting point thermoadhesive filament is fused while being subjected to elongation heat treatment, and is wound onto the dyeing cheese by a winding roller in an overfeed state between a winding roller and a reroller.

In the above-mentioned fluid agitation process using the air injection nozzle, that is, entangling and entangling process, the feed rate between the feed roller and the delivery roller is +3 to 20% for synthetic fiber multifilament, preferably 5 to 10%. Yes, low melting point thermoadhesive filaments have a lower feed rate or the same rate. When the feed rate is less than +3%, the synthetic fiber multifilament and the low melting point thermoadhesive filament become tangled by the air injection, hardly any intertwining occurs, and the fusion of the low melting point thermoadhesive filament is weak, causing problems during sewing. The filaments tend to open up and become difficult to sew, and if the feed rate exceeds +20%, the air jets will cause enough entanglement, but the air jets will cause more damage and tend to reduce the strength of the sewing thread. Is recognized.

The pressure of the air supplied to the air injection nozzle is 3 to 10 kg/
The range of ad is preferable and may be adjusted in consideration of the processing speed of the filament.

Next, the heating range for fixing the entanglement and entanglement of the low melting point thermoadhesive filament of the yarn, that is, the longer the heater, the greater the ability. In order to increase the fusion of the material, the heat set feed rate between the delivery roller and the take-up roller may be adjusted to the target shrinkage within the range of +5% to -15%, although this will vary depending on the synthetic fiber multifilament supplied. The temperature of the heat treatment using a heater varies depending on the dry heat melting temperature of the synthetic fiber multifilament or low melting point thermoadhesive filament to be supplied, but it is usually preferable to perform the treatment at 100°C to 200°C.
When the heat treatment temperature is less than 100°C, it takes time to fuse the low melting point thermoadhesive filament, and the entanglement of the synthetic fiber multifilament cannot be sufficiently fixed.
Furthermore, during dyeing, the synthetic fiber multifilament is fused with a low melting point thermoadhesive filament in a contracted state, so the heat treatment temperature is 200%, which is not suitable for sewing with high tension.
If the temperature exceeds .degree. C., the low melting point thermoadhesive filament will be sufficiently melted and fused, but the synthetic fiber multifilament will also be exposed to high temperatures, resulting in thermal deterioration of the filament, which is unfavorable in terms of yarn quality.

The interlaced yarn guided by the take-up roller 17 and to which the low-melting point thermoadhesive filament has been touched is wound up by a wind-up roller so as to be dyed with cheese, and then wound into cheese. The winding feed rate at this time is 0 to -17%, the winding density value A[A-(g/ρ)/V, g is the winding weight (duram), and ρ is the ratio of the winding fiber - F, ■ is I? 8 Toryo J1 ((!
1')) is wound to fall within the range of 0.10 to 0.30. When the paper is rolled up at such a density, dyeing can be carried out smoothly in the subsequent process. Winding density value A is 0
．． In the case of 30E or more, the winding density value is too large and the dye does not penetrate uniformly and sufficiently into the inside of the winding, resulting in uneven dyeing, making the thread unsuitable in appearance as a sewing thread. Moreover, depending on the type of rolled fiber, shrinkage of the fibers during dyeing may cause damage to the rolled cheese. If the winding density value is 0.10 or less, the dye will penetrate uniformly and sufficiently into the inside of the winding, but the winding foot rate cannot be well controlled between the take-up roller and the winding roller during winding. However, there is a problem in processing that winding cannot be done properly. Winding density value is 0.10~0
．． The intertwined threads wound into dyeing cheese to a dyeing size of 30 mm are dyed using a high-pressure cheese dyeing machine in the usual manner, and then the filament of the present invention is obtained by adding an oil agent and winding the yarn into an arbitrary winding pattern. Sewing machine type is available.

In the present invention, resin may be applied to the intertwined yarn led out from the air injection nozzle using a resin roller in order to further improve the cohesiveness. The resin to be applied is mainly urethane resin, polyester resin, silicone resin, melamine resin, polyamide resin, etc., and it is sufficient to use at least one of these resins. Desirable in terms of sex, V! J
The amount of fat deposited is preferably less than 10%; if the amount of fat deposited exceeds 10%, even if the binding property is sufficient, the yarn becomes stiff, which tends to cause defects in sewing properties, which is not preferred.

The injection processing feed rate, heat set feed rate, and winding feed rate in the present invention are based on the following formulas.

Injection processing feed 41 (%) Heat set feed rate (%) Winding feed rate (%) Function The filament sewing thread of the present invention is not only non-torque, but also entangled by fluid boundary treatment,
The fibers are tightly bundled together and the fibers are firmly fused with a low melting point thermoadhesive filament.
Layer entanglement is strengthened.

Therefore, even if the dyeing cheese is continuously wound up and dyed, the intertwined threads will not open at that time, so even if the sewing thread is sewn under high force with sewing thread, it will not be sewn. There will be no reduction in elasticity or yarn breakage. In addition, by carrying out the process for obtaining these cheeses for dyeing in a continuous process, it is possible to obtain both the effects of improving productivity and reducing processing costs.

EXAMPLES The present invention will be explained below using examples. The performance of the samples in the examples was measured and evaluated in the following manner.

(1) Determination of staining spots A 21 qr sample rolled up using dyed cheese is dyed using a cheese dyeing machine, then rolled up in several stages from the outer layer of cheese to the innermost layer using a cone winder, and the hue is observed with the naked eye. Please judge based on the following criteria.

O: No difference in hue was observed Δ: A slight difference in hue was observed ×: A clear difference in hue was observed (2) Thread breakage tension 48.8m+,
Two seat belts with a thickness of 1.15 m + and a weave density of 172 warp/inch 18.5 thread/inch are stacked and the sewing machine rotation speed is 200.
The a-high thread breakage tension when sewn at 01 t/min and 12 go/101 stitches was measured using a Checkmaster tensiometer manufactured by Kanegata-L Machine Co., Ltd. and rated.

(3) Thread breakage speed: 1-needle, lockstitch, vertical feed sewing machine, 1-system tension: 300
At ↓-Place the two seat belts in item (2) above,
The number of revolutions at which the yarn broke when sewing was performed at 11,120 stitches/10 cs was measured using a tachometer manufactured by Ono Seiki Co., Ltd. and evaluated.

(4) Using a high-stitch single-needle lockstitch top-feed sewing machine, overlap two seat belts from item (2) above with a width of 53, and repeat at a rotation speed of 2000 stitches/
Minute, I! (2) Sewn seatbelts were made with vI stitches of 15 (6 stitches), and the lower L of the sewn seat belt was pulled using an autograph manufactured by R: J Tsu Seisakusho (2), and the seam strength was measured and evaluated.

Further, FIG. 1 is a schematic diagram illustrating an apparatus used in manufacturing the filament sewing thread of this embodiment.

In FIG. 1, a feed roller 1.1' has an air injection nostle 2, a delivery roller 3, a resin roller 8, a heater 4, a take-up roller 5, a wind-up roller 6, and a dyeing cheese 7 arranged in this order.

Then, the synthetic fiber multifilament Y1 and the low melting point thermoadhesive filament Y2 are placed on feed rollers 1 and 1, respectively.
1' to the air injection nozzle 2, and performs fluid agitation treatment while overfeeding each with the delivery roller 3, forming entanglements and entanglements, and bonding the synthetic fiber multifilament Y1 with low melting point thermal adhesiveness. The filaments Y2 are bundled and bundled, and then over- or under-feeded between a take-up roller 5 by a heater 4 and subjected to relaxation or moderate heat treatment, while fusing the synthetic fiber multifilaments with a low melting point thermal adhesive filament. Heat set, then dyeing cheese 7 with I-removal roller 6
It is possible to obtain continuous filament sewing thread by winding it up so that it can be dyed. Incidentally, in order to further improve the cohesiveness of the filament sewing thread, a resin may be added using Resin 1]-Ra 8.

The longer the length of the heater 4, the greater its capacity, but due to problems such as on processing equipment, the heater 4 is
It is preferable to turn the inside several times, and when turning the yarn by the turn roller 4a in the heater 4 in order to flatten the yarn without 1f, the first half of the heat treatment is the J1 contact type, and the second half is the contact type (heating plate 4b). ) is preferable.

Example 1 Herajet 341 type [Heparin] was used as the air injection nozzle 2.
A nylon multifilament of 840 denier/192 filament as the synthetic fiber multifilament Y1 and a dry heat melting temperature of 10 (1'c A thermoadhesive filament 100 denier/12 filament (product name: Flor M, manufactured by Unitika ■) consisting of a polyamide copolymer resin) was supplied, and the feed rate of the nylon multifilament Y1 was 6% polyamide copolymer resin. Heat-adhesive filament 1
~Y2 feed $3%, air pressure 5 kg/c
d.

Tangle caused by fluid disturbance treatment at machining speed of 100 m/1 m1n.

Form entanglement, bundle and converge, then use a heater 4 with a length of 50 cm at a temperature of 160°C, make 2.5 reciprocations with a turn roller 4a, and heat the first two reciprocations in a non-contact manner.
During the latter 0.5 reciprocation, the low melting point thermoadhesive filament Y2 was fused and passed through contact with the 50011 hot plate 4b. The heat set feed rate at this time was 1+-1.0%. Subsequently, the interlaced yarn after the fusing process Fl was wound up onto the dyeing cheese 7 via the winding roller 6 at a winding feed rate of +4.0%. The winding density value at this time is 0.25゜l! The amount was 2 kg. Note that the above treatment was carried out in a continuous process. moreover,
The interlaced yarn wound into dyeing cheese 7 was put into a high-temperature, high-pressure cheese dyeing machine model 5AX-F+Kl (manufactured by Hunmura Kagaku Kikai Kogyo ■), and scouring and dyeing were performed according to the following recipe.

[Scouring prescription]

Sunmoor FL [manufactured by EI Huahuaji 2] 1tr/Q Scouring temperature 60℃ Scouring time 30 minutes [Dyeing recipe] 5uninol 1ast Navy Blue H1
, 0% owf [acidic dye, manufactured by Jujutsu Kagaku ■] Levelan NKD 2% owf [
Level dyeing agent, manufactured by Marubishi Yuka Kogyo@] Acetic acid 0.5 cc / ρ (P; 1 adjustment) Dyeing temperature 100°C Dyeing time 60 minutes bath Ratio 1:5 Next, hot water wash, 1 water wash, dehydration, Dry and use a regular corn winder. ! While performing Fα treatment, 1.0% of Merry A F-715 oil manufactured by Maruoi Yuka Kogyo ■ was added to obtain a filament sewing thread of the present invention. The performance of the obtained filament sewing thread was measured and the results are shown in Table 1.

Example 2 Nylon multifilament 840 denier/192 filament and thermoadhesive filament 50 denier/6 filament made of polyamide copolymer resin [trade name: Flor M, manufactured by Unitika ■] were used, and the same processing machine as in Example 1 was used. , entanglement processing was carried out under the same conditions, and then 3% of a resin solution prepared by adjusting 1 part of Hytran AP The cheese was coated and fixed, and rolled up onto dyeing cheese at a winding feed rate of +2.5%, a winding density of i 0.21, and a winding amount of 2, and then scouring and dyeing were carried out using the same recipe as in Example 1. , a filament sewing thread of the present invention was obtained. The performance of the obtained filament sewing thread was measured and the results are shown in Table 1.

Comparative Examples 1 to 2 Nylon multifilament 8 was used as synthetic fiber multifilament Y1 in the same device as used in Example 1 above.
40 denier/192 filament quantity supplied, #! The winding density value at this time is 0.3%.
A filament sewing thread for comparison was obtained using the same thread 1'1 as in Example 1 except that the thread number was 32 (Comparative Example 1). Further, a filament sewing thread for comparison was obtained under exactly the same conditions as in Example 1, except that the winding feed rate was -2,096 and the winding density value at this time was 0.43 (Comparative Example 2). . The performance of the filament sewing threads of Comparative Examples 1 and 2 thus obtained was measured, and the results are shown in Table 1.

As is clear from Table 1, all of the filament sewing machine systems of the present invention have superior performance in severe sewing under high tension and at high speeds, compared to the sewing threads of comparative examples, and also have + ! It was a filament sewing thread that did not cause dyeing spots even if the repair process was omitted.

Effects of the Invention As described above, the filament sewing thread of the present invention has excellent thread breakage performance even when made from Yl under high tension and at high speed.

Furthermore, in the method for manufacturing filament sewing thread of the present invention,
Since the material is continuously rolled up to an appropriate winding density value and dyed as is, it is possible to improve productivity and reduce processing costs.

[Brief explanation of the drawing]

FIG. 1 is an IRQ explanatory diagram showing an example of an apparatus for manufacturing filament sewing thread of the present invention.

Claims (1)

[Scope of Claims] 1. Consisting of a synthetic fiber multifilament whose constituent filaments are bundled by fluid agitation treatment and a thermoadhesive filament having a lower melting point than the synthetic fiber multifilament, the low melting point thermoadhesive filament is fused. A filament sewing thread characterized by being colored and dyed. 2. A synthetic fiber multifilament and a thermoadhesive filament with a lower melting point than the synthetic fiber multifilament are subjected to a fluid agitation treatment, the constituent filaments are bundled, and then continuously heat treated to synthesize the thermoadhesive filament with a lower melting point. A method for producing a filament sewing thread, which comprises winding the fiber multifilaments together at a winding density of 0.10 to 0.30 on a dyeing cheese, and then dyeing the thread.