JPH03180530A - Chenille yarn - Google Patents

Abstract

PURPOSE:To obtain chenille yarn having excellent void filling characteristics, handle after void filling, etc., in chenille yarn using polyethylene terephthalate- based yarn, etc., as decorative yarn and core yarn, by using a specific polyhexamethylene terephthalate-based polymer as pressing yarn. CONSTITUTION:In chenille yarn using polyethylene terephthalate-based yarn or polybutylene terephthalate-based yarn as decorative yarn and core yarn, the decorative yarn and the core yarn are fixed by using a polyhexamethylene terephthalate-based polymer which has >=130 deg.C, preferably 135-150 deg.C melting point and contains preferably >=90mol% terephthalic acid in acid component and >=90mol% 1,6-hexadiol in glycol component as pressing yarn to give chenille yarn having excellent dimensional stability even under high-temperature and high pressure hot water treating condition, excellent shape stability and good dyeability.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a polyester-based mole yarn, and its purpose is to dye it under high-temperature, high-pressure heat at 100 to 130°C, which is the usual dyeing condition for polyester. It has dimensional stability even under water treatment, maintains morphological stability, is easy to dye, and has sealing properties that prevent filament pulling out by dry heat treatment at 130-160℃. It is an object of the present invention to provide a polyester-based malleable yarn which is characterized by having extremely good elasticity, flexibility and good feel even after sealing.

(Prior Art) Molle yarn has been widely used in high-quality sheet materials and high-grade curtain materials in the shell. The method for manufacturing the mall yarn is as follows: - Using a device as shown in Fig. 14 inside the shell, filament yarn, core yarn, presser yarn (the presser yarn substantially constitutes a part of the core yarn, so In the present invention, O-filament is a fiber material with a structure as shown in Fig. 15, which is composed of three parts (the presser thread is included in the core thread), but the thread is not pulled out from the core thread. In addition, it is necessary to use a fiber that exhibits a binder effect as the presser yarn, which is usually a part of the core yarn, to seal the core yarns together. If the adhesion effect of this presser thread is insufficient, the filament may come loose during the process of being used as a product, and not only will the textile product have a poor appearance, but also the filament The problem with removing scraps is that a large amount of fibers are generated during the removal process, making them unusable.

Conventionally, in order to prevent the above-mentioned troubles from occurring, low-temperature hot-melt type polyamide modified fibers that melt at low temperatures were used as presser threads, and the polyamide modified fibers were melted by dry heat treatment at about 100°C. A commonly used method is to fix the joining point between the yarn and the core yarn to prevent the filament from slipping out. However, presser threads made of such modified polyamide fibers melt at low temperatures of around 100°C, so when using polyamide fibers such as nylon 6 for filaments and core threads, they cannot be used at temperatures below 100°C. This did not pose much of a problem because it can be dyed with acid dyes, but when using polyester fibers such as polyethylene terephthalate, dyeing with disperse dyes is required under high-temperature, high-pressure hot water at a dyeing temperature of usually 100°C or higher. Because this treatment had to be carried out, the pressing thread made of the modified polyamide fibers softened and melted during the dyeing process, causing the polymer to flow out, resulting in a significant loss of the sealing effect after the dyeing process, which was a problem. . In addition, since conventional presser threads are mainly made of modified polyamide fibers, if the filaments and core threads are made of polyamide fibers such as nylon 6, they exhibit excellent thermal adhesive properties due to their good compatibility. However, when the filaments and core yarns are made of polyester, the thermal adhesion is insufficient due to poor compatibility between the polymers, and the reality is that only the low melting point polymer of the presser yarn can be expected to have a fixing effect. there were.

For the above-mentioned reasons, polyamide-based fiber products have conventionally been mainly used as mall threads, and polyester-based products have not been used much at present. However, in recent years, the role of polyester fibers such as polyethylene terephthalate (hereinafter abbreviated as PET) has grown in the textile field, and polyester fibers are also strongly desired for molle yarns from the viewpoints of production efficiency, energy savings, and excellent fiber properties. was.

(Problems to be Solved by the Invention) The present inventors have determined that in order to obtain a polyester-based mall yarn that has good processability to the level that can be commercially produced and is also good as a textile product, what kind of material should be used and what kind of structure should be used. This study has determined what should be done. In particular, even under high-temperature, high-pressure hot water treatment at 100 to 130°C, which is the usual dyeing condition for polyester fibers, the fibers of the thermoadhesive polymer component that make up the mall yarn do not melt and flow.
By maintaining the morphological stability of the mall yarn, making it easy to dye, and performing dry heat treatment at 130 to 160°C,
In order to have excellent thermal adhesion to polyester fibers and to exhibit a sealing effect, and to ensure that the flexibility and texture of the molle yarn are not substantially impaired even after sealing. This study determined what kind of material should be used.

(Means for Solving the Problems) The present invention provides a mole yarn in which the filaments and the core yarn are made of polyethylene terephthalate fibers or polybutylene terephthalate fibers, the filaments and the core yarn having a melting point of 13
A polyester-based mall thread characterized by being fixed by a polyhexamethylene terephthalate-based polymer having a temperature of 0° C. or higher, and in which the filaments and the core yarn are made of polyethylene terephthalate-based fibers or polybutylene terephthalate-based fibers, The present invention is a polyester-based mall yarn characterized in that the filament yarn or the core yarn contains the following fibers (a) or (b).

(a) (b) A fiber made of a polyhexamethylene lenticulate polymer with a melting point of 130° C. or higher, a fiber made of a polymer layer of the above (a) and a thermoplastic polymer layer with a melting point higher than that of the polymer of the above (a). To explain the present invention more specifically, the multi-component fiber is a heat-adhesive polymer having a soaked sealing effect, and the acid component is mainly terephthalic acid (TA). component, glycol component is 1
．． A polyhexamethylene terephthalate polymer containing 6-hexanediol (I(D)) as a main component is used, and a polymer having a copolymerization amount of a third component other than TA%HD of 20 mol% or less is particularly desirable. It is necessary that the melting point is 130°C or higher to prevent melt flow during dyeing.In addition, the heat of crystal fusion (ΔHu) must be 2caQ
/g or more, and the shortest crystallization time is preferably 90 seconds or less.

Various polyester fibers have been known so far. The present invention provides that, among conventionally known polyester adhesive fibers, polyhexamethylene terephthalate fibers are particularly excellent in sealing properties for molle yarns, and do not impair the flexibility of molle yarns or the performance of filaments. What I discovered is that there is no such thing.

In addition, the copolymerization mol% referred to in the present invention refers to the amount of T added for copolymerization that accounts for the dicarboxylic acid constituting the polyester.
The total number of moles of dicarboxylic acids other than A and the mol% of diols other than HD added for copolymerization in the diols constituting the polyester, when oxycarboxylic acids are used as copolymerization components. is the ratio of the number of moles of oxycarboxylic acid to the number of moles obtained by multiplying the total number of moles of dicarboxylic acid, diol, and oxycarboxylic acid constituting the polyester by 0.5.

In the present invention, the polyester constituting the fiber used as a filler for the molle yarn is the total acid component of the produced polyester (if it contains an oxyacid, half of it is an acid component,
% of copolymerization (considering 1/2 as diol component)
Hereinafter, copolymerization % is expressed as mol % based on the total acid composition), and those containing TA of 80 mol % or more, preferably 85 mol % or more, and more preferably 90 mol % or more are preferably used.

If the TA content is less than 80 mol%, the physical properties of the polymer, the quality of w&fibers, and processability are not good, and the cost is also not appropriate.

In addition, the proportion of HD in the glycol component is 80 mol% or more, preferably 85 mol% or more, and more preferably 9 mol% or more.
0 mol % or more of radish is preferably used.

If it is less than 80 mol%, it is difficult to obtain the desired polymer physical properties, which is undesirable in terms of physical properties, and the quality and processability of the fibers are also reduced, and it is also not suitable in terms of cost.

Other copolymerization components other than TA and HD include various aromatic dicarboxylic acids, oxyacids, fatty acid dicarboxylic acids, aromatic diols, aliphatic diols, ring diols, etc., such as phthalic acid, isophthalic acid, acids, aromatic dicarboxylic acids such as 5-sodium sulfoisophthalic acid and naphthalene dicarboxylic acid, adipic acid, azelaic acid,
Aliphatic dicarboxylic acids such as sebacic acid or their esters, and ethylene glycol, diethylene glycol, triethylene glycol, trimethylene glycol,
Diol compounds such as 1.4-butanediol, 1.5-bentanediol, neopentyl glycol, P-xylylene glycol, cyclohexane 1,4-nomethanol, polyethylene glycol, polytetramethylene glycol, oxyalkaline acid, oxyamic acid, Oxycarboxylic acid compounds such as ethoxybenzoic acid and naphthoic acid. Also,
The polyhexamethylene terephthalate-based polyester is preferably a polyester in which 80 mol% or more of the structural units are hexamethylene terephthalate units. The polyester may also contain small amounts of additives, fluorescent enhancers, matting agents, stabilizers, ultraviolet absorbers, and the like.

In addition, the polyhexamethylene terephthalate polyester must have a melting point in the range of 130 to 150"C, preferably in the range of 135 to 150"C. The heat resistance during the dyeing process at approximately 130°C, which is the processing condition, is insufficient, resulting in poor morphology as a malleable yarn.
If the hand becomes poor or worse, the polyhexamethylene terephthalate polymer component, which is required to have a thermal adhesive effect, melts and flows and disappears from the molle yarn, causing the original property to deteriorate. This is undesirable because it becomes impossible to achieve the sealing effect in the final finished product.

In other words, it is not possible to obtain a polyester molding yarn that has good filling properties, good hand feel, and good dyeability, which are important objectives of the present invention. The melting point of polyhexamethylene terephthalate homopolymer is 150°C.
It is.

Furthermore, in the present invention, the polyhexamethylene terephthalate polymer has a heat of crystal fusion (ΔHu) of 2.0 cal.
2/g or more, desirably 2.5 cal2/g or more, more preferably 3.0 cal2/g or more is suitably used. If it is less than 2.0 ca (!/g), it is undesirable because it tends to cause sticking during fiber production. To measure ΔHu, the sample is taken out as fibrous or thin film pieces finer than the molten polymer, cooled, and left at room temperature for 3 days or more. The temperature is raised at a rate of 10° C./min in nitrogen using a differential scanning calorimeter (DSC), and the measurement is performed based on the area of the endothermic peak during melting.

Furthermore, the polyhexamethylene terephthalate polymer used in the present invention has a minimum crystallization time (CT),
) within 90 seconds, preferably within 70 seconds, more preferably within 50 seconds. If the time is longer than 90 seconds, sticking may occur during fiber production, which is not preferable.

CTm1n is defined as the crystallization start time when a substantially non-oriented film micropiece is placed in a silicon bath or water bath at a predetermined temperature from a molten state and left in the bath, and the time when whitening starts is defined as the crystallization start time. The crystallization initiation time in the temperature range of ~120°C is the shortest crystallization initiation time. CTa1
In order to find n, it is possible to leave it in the air without putting it in a bath, but it is preferable to do so in a bath because the heat exchange rate is higher and the influence of the cooling process can be reduced. In this case, we will use the value in the bath. To find CTsin, change the temperature and calculate CTa1n.

It is not necessarily necessary to measure the 0-1
A sufficient condition is that the crystallization time at a certain temperature in the range of 20° C. is within 90 seconds. The temperature indicating CTsin may be near 0°C, or may be near 120°C. The crystallization time in the actual fiber manufacturing process varies depending on the temperature history, etc., but it is natural that the crystallization rate in the process will be faster if the temperature is set to CTa1n. Furthermore, when fibers are oriented as during spinning, the crystallization rate may increase; however, CTmin defined in the present invention,
can be used as a measure related to process efficiency.

Since the polyhexamethylene terephthalate polymer used in the present invention has a secondary transition point lower than room temperature, the crystallization rate should be as fast as possible. If oriented crystallization has not progressed by the time the fiber is wound up during spinning, problems such as sticking between single fibers may occur, which is not preferable.

The present invention consists in constructing a molle yarn by using a fiber using the polyhexamethylene terephthalate polymer described above as a heat-adhesive fiber that has a sealing effect to prevent the filaments of the molle yarn from coming out. An important point is the thermal adhesion! One important point in making fibers is that unless a material with an appropriate intrinsic viscosity is used, it is difficult to perform fiberization while maintaining a certain degree of fiberization processability. From this, the intrinsic viscosity [η] is 0.50d1
It is preferable to make it 2/g or more. More preferably 0.6
0 to 1.50 d12/g, particularly preferably 0.7
The range is 0 to 1.2 O-d (1/g).

Note that this intrinsic viscosity condition is a suitable condition when polyhexamethylene terephthalate-based polymer is used as the fiber in (a) above, and when it is used as a multicomponent fiber as in (b) above, this condition is suitable. Even if the conditions are outside the range, the intended purpose will be achieved.

The measurement of intrinsic viscosity described here is based on phenol 50w
t% and 50 wt% of tetraglolethane, and was measured using an Ostwald viscometer at 30°C. When [η] was less than 0.50 d12/g, the melt viscosity was too low and the spinnability and drawability were poor.

In particular, the stretchability is poor, single fiber breakage and yarn breakage occur frequently, and the strength of the obtained W& fiber is low, which is undesirable. [When η exceeds 150, the melt viscosity becomes too high,
When a draft is applied during spinning, the spinnability becomes extremely poor and yarn breakage occurs frequently, which is undesirable.

Another important point in obtaining the polyhexamethylene terephthalate-based vA fiber is that the single fiber denier is preferably 8 deniers or less. More preferably, it is 5 deniers or less.

When the single fiber denier exceeds 8 denier, the feel of the malleable yarn made of the polyhexane terephthalate fiber becomes stiff, and the binder effect to prevent the filament from pulling out becomes slightly worse. This is undesirable because it becomes necessary to prepare a malleable yarn by increasing the blending ratio of fibers. Possible reasons for this are:
We believe that if the single fiber denier becomes too thick, the binder polymer will become somewhat unevenly distributed when it plays a role as a binder polymer during heat treatment, resulting in a hard texture and a decrease in binder adhesion effect. It will be done. It is preferably used in the form of a fine denier multifilament. This was discovered for the first time in the process of various studies by the present inventors, and is an interesting fact.

Note that this single fiber fineness condition is similar to the above-mentioned intrinsic viscosity condition,
These are suitable conditions when used as a fiber in (a) above, and when used as a multicomponent fiber as in (b) above, the intended purpose can be achieved even if the conditions are outside of this range. be done.

To explain the conditions for fiberizing the polyhexamethylene terephthalate polymer used in the present invention, polyester pellets are melt-extruded and extruded from a spinneret heated to 1110 to 200°C for approximately 1000 m/+*
After that, in the case of filament, the roller plate is stretched at a heating temperature of 50 to 120 °C, and in the case of stable, the water bath is stretched at a temperature of 50 to 90 °C. Fiber is obtained.

It is preferable to avoid using polyhexamethylene terephthalate fibers in an amount of 1 wt% or more of the entire mole yarn.

The above-mentioned polyhexamethylene terephthalate-based fibers are mainly explained in the case (a) above, but more preferably in the case (b) above, that is, the polyhexamethylene terephthalate-based fiber has a melting point of 130° C. or higher and a polyhexamethylene terephthalate-based polymer layer with a melting point of This is the case when using a multicomponent fiber consisting of a thermoplastic polymer layer higher than 40% of the polyhexamethylene terephthalate-based polymer, in which 40% or more of the multicomponent system@cone surface area is covered with the polyhexamethylene terephthalate polymer. . By using such multi-component fibers, it is possible to obtain dimensional stability during high-temperature and high-pressure dyeing.

Further, it is possible to suppress shrinkage of the molding yarn during and after thermal bonding. If less than 40% of the surface area of the multicomponent fiber is covered with the polyhexamethylene terephthalate polymer, sufficient fixation of the core yarn and filament by heat fusion cannot be achieved.

The thermoplastic polymer constituting the multicomponent fiber is not particularly limited as long as it has a higher melting point than the polyhexamethylene terephthalate polymer used at the same time. Preferably polyester or polyamide;
Examples of the polyester include terephthalic acid, isophthalic acid, naphthalene 2,6-dicarboxylic acid, phthalic acid, and α.

Aromatic dicarboxylic acids such as β-(4-carboxyphenoxy)ethane, 4,4-dicarboxydiphenyl, pentasodium sulfoisophthalic acid, or aliphatic dicarboxylic acids such as adipic acid and sebacic acid, or esters thereof, and ethylene. glycol, diethylene glycol,
1.4 Butanediol! , 6-hexanediol, neopentyl glycol, cyclohexane 1,4-dimetatool, polyethylene glycol, polytetramethylene glycol, and other diol compounds, and 80 mol% or more of the constituent units are ethylene terephthalate. Polyesters which are units or butylene terephthalate units or hexamethylene terephthalate units are preferred.

In addition, small amounts of additives, optical brighteners,
It may also contain a stabilizer or an ultraviolet absorber.

In addition, polyamides include nylon 6, nylon 66,
It is a polyamide whose main components are nylon 610 and nylon 12, and may also be a polyamide containing a small amount of a third component.

These may contain small amounts of additives, optical brighteners, stabilizers, etc. When the melting point of these polymers is lower than that of the polyhexamethylene terephthalate polyester,
If it melts at the same time as sealing or dyeing, the intended purpose cannot be achieved.

Preferred examples of the multicomponent fibers used in the present invention include conjugate fibers, and specific examples of their cross-sectional shapes are illustrated in Figure 1, complete core-sheath type conjugate fibers, 2. 3.5 A core-sheath type composite fiber with an irregularly shaped core component as shown in Figure 4, a multicore type composite fiber as shown in Figure 4, an eccentric core-sheath type composite fiber as shown in Figure 6, and an irregular cross section as shown in Figure 7.10. Core-sheath composite**
, laminated composite fibers as shown in Figure 8, multi-layered composite fibers as shown in Figure 9, modified multi-layered composite fibers as shown in Figure 11, random as shown in Figures 12 and 13. Also includes composite fibers. (A) in Figures 1 to 13
The component is a polyhexamethylene terephthalate polymer (component 0 is a thermoplastic polymer with a higher melting point than component (a). It is necessary that the polymer of component (a) occupies 40% or more of the fiber surface.40 If it is less than %, as mentioned above, it is difficult to obtain a fiber having a good filament sealing effect, which is the object of the present invention, so it is not preferable.
The composite ratio of the zero component is preferably in the range of 80:20 to 20:80% by weight. If the content of component (a) is less than 20% by weight, it is not preferable because the adhesion effect to the good polyester filament, which is the object of the present invention, will be insufficient. Moreover, if it exceeds 80% by weight, process properties such as spinnability and stretchability will deteriorate, and the A maximum will decrease, which is not preferable.

When using the multi-component fibers described above, it is preferable to use the multi-component fibers in an amount of 2% by weight or more of the entire molle yarn.

The production of multicomponent systems, especially conjugate fibers, can be carried out using conventional ventral spinning equipment. In other words, one of the two melt extruders (1) contains component (A), and the other (2) contains (0).
) is filled with ingredients. The polymer streams melted and extruded by the extruder are each accurately metered by a gear pump and sent to the spinning head. The two types of polymer streams are combined by a back metal fitting installed in the head, and then discharged from a spinneret to form fibers.

The composite form of component (a) and component 0 was determined by taking into consideration process properties such as spinnability and stretchability, and adhesive effect, and as mentioned earlier, component (a) accounts for 40% or more of the fiber surface area. It turns out that any format is fine as long as it can be included.

When mixing components (A) and (0) to some extent as shown in FIGS. 12 and 13, a static mixer is used.

The spinning speed may be either 3,000 a/sin or less, as with general fibers, or high-speed spinning of 3,000 to 5,000 m/sin. (a) Component polymers may lack spinnability when used alone, but PET, PBT
By combining it with nylon, nylon, etc., even high-speed spinning can be performed without any problem. Depending on the composite resin or composite form, separation of the two resins may occur during stretching, so high-speed spinning is effective in that case. If this is not the case, it is also possible to obtain a yarn with high strength by spinning at a spinning speed of Jlit and ensuring stretching.

Fig. 14 schematically shows the manufacturing process for general molle yarn. Usually, the presser thread plays an important role in holding down the filament from being pulled out. Therefore, it is common practice to use polyhexamethylene terephthalate binder fibers as presser yarns, but depending on the purpose, if it is necessary to make the texture a little stiffer and improve the sealing properties, use other than filament threads or presser yarns. It may be mixed as part of the core yarn. however,
If the amount used is 30 wt% or more, the filament sealing properties are sufficient, but the feel of the yarn as a malleable yarn becomes somewhat hard, which is not preferable. The greatest feature of the present invention is that even though polyester fibers are used for the filaments and the core yarn, polyhexamethylene terephthalate fibers are used as the presser yarn, which is a part of the core yarn, so that the filament can be made into a good filament by thermal bonding treatment. The advantage of this is that it exhibits filler properties that suppress bleed-out, and at the same time, no trouble occurs even when dyeing is carried out under high temperature and pressure at 130° C., which is the usual dyeing condition for polyester.

When conventional low-melting polyamide fibers are used as binder fibers, they soften and melt during the dyeing process at high temperatures and pressures of 100'C or more, escaping from the molding yarns and causing heat loss in the final process. Even with the adhesive treatment, the sufficient effect of sealing the filaments ends up disappearing. By using polyhexamethylene terephthalate fibers, polyhexamethylene terephthalate fibers with good texture and good filament adhesion were obtained for the first time.

In the present invention, the main fibers constituting the filament and the core yarn are polyethylene terephthalate-based or polybutylene terephthalate-based fibers, that is, fibers in which 80 mol% or more of the structural units are ethylene terephthalate semi-α or butylene terephthalate units. Of course, both fibers may be used in combination to form the main V&fiber.

The present invention will be explained below with reference to examples, and the manufacturing apparatus shown in FIG. 14 was used to manufacture the molding yarn. After making the mall yarn, it was made into a general shape, and then the obtained filament was heat-treated in a relaxed state in a hot air atmosphere at 180'C for 5 minutes to thermally bond the filament. Thereafter, to confirm the heat treatment, a dyeing process was carried out by dispersion dyeing at 130° C. for 60 minutes under high temperature and high pressure, which is the usual dyeing condition of polyester Wit <41. Thereafter, the resulting dyed mall yarn was used as a Han yarn to produce a plain woven fabric, and was used as a sample for evaluating the pull-out property of the filament. The pull-out evaluation is +
111 A piece of fabric 5 x 10 cm in size was taken, and after adhering commercially available cellophane tape to the surface of the fabric, a load of 5tt8 was applied (0,1
kg/cm"), after leaving it as it is for 5 minutes, peel off the adhesive cellophane tape from the fabric, observe the adhesion state of the filament that has been pulled out from the mall yarn on the cellophane tape, and check the ease of pulling out the filament yarn. Evaluation was made on a five-point scale.

Example 1 A polycondensation reaction was carried out at 260°C by a conventional method using a polycondensation reaction apparatus, and 97 mol% of TA, 3 IPA (isophthalic acid)
A copolymerized polyester containing 100 mol% of 1.6 hexanediol was produced, and then extruded into water in the form of a sheet from the bottom of the polymerization vessel, and cut into pellets using a sheet cutter.

The extrusion and cutting properties were good, and pellets with a good shape were obtained. Polymer physical properties are [η] 0.90, melting point 14
The crystallization time at 4°C, ΔH about tO,S, and 90°C was about 3 seconds. The resulting pellets were dried under vacuum at 100 °C.
It was dried.

Then, the spinning head was extruded for 1000 m at a temperature of 200°C.
/min. The wound fibers had almost no sticking between single fibers or between IT bundles, and could be stably spun for a long period of time. Pellets in the extruder! 3. Feedability was good and there were no problems. This spun yarn is heated with a hot roller at 50°C.
Dry heat drawing and heat setting were performed on a hot plate at 120° C. and a drawing rate of 3.2 times to obtain a drawn yarn of 75 denier and 24 filaments. The spinnability and stretchability were good and there were no problems.

Next, a mall thread was produced by the method shown in FIG. Two polyhexamethylene terephthalate m175d/24f yarns were used as presser yarns, and polyester spun yarn 30/2 was used as a core yarn. Thereafter, the molded yarn was made into a general shape, and the resulting yarn was heat-treated in a relaxed state in hot air at 180° C. for 5 minutes, and the filament was thermally bonded with a presser yarn. Thereafter, the heat-treated specimen was dyed in that state under the following conditions.

130℃ x 60 minutes, polyester span 3o/2 as warp, density 9
A plain woven fabric was produced with a density of 6 yarns/inch and 32 yarns/inch after dyeing as weft yarns. After that, 1 ocs of the obtained fabric piece sx was taken, and after adhering cellophane tape, a load of 5
kg (so that it becomes 0.1 kg/cab') and leave it as it is for 5 minutes, then peel off the cellophane adhesive from the fabric and observe the adhesion of the filament that has come out from the mall thread on the peeled cellophane tape. did. As a result, it was confirmed that most of the adhesive adhered to the sellotape and nothing came out when removed. Furthermore, the feel of the yarn as a malleable yarn was soft and good.

Examples 2 to 3 The mixing ratio of the heat-adhesive polyhexamethylene terephthalate fiber in the mall yarn was the same as in Example N1. The test was carried out under the same conditions as in Example except that l1j2 was 10vt% and Example 3 was 20vt%. It was found that good malleable yarns could be obtained in both cases.

Examples 4 to 7 Using a copolymerized polyester having the same polymer composition as in Example 1, tests were conducted under the conditions listed in Table 1, and the results are shown. Examples 4.5 each have a single fiber denier of 1.2
denier and 5.0 denier. Example 6.7 is
[η] was set to 1.20 and 0.70, respectively. Other conditions were the same as in Example 1. In all cases, good malle yarns were obtained which had good properties in the fiberizing process and were free from filament removal.

Examples 8 to 12 A polycondensation reaction was carried out at 260°C by a conventional method using a polycondensation reaction apparatus, and in Example 8, a copolymerized polyester of 97 mol% TA, 3 mol% sebacic acid, and mol% HDIOG was prepared, In Example 1tlJ9, a copolymerized polyester of 90 mol% TA, 10 mol% isophthalic acid, and 100 mol% HD was prepared, and Example 101 100 mol% TA, 90 mol% HD was prepared.
In Example tt, a copolymerized polyester containing 95 mol% of TA, 5 mol% of isophthalic acid, 95 mol% of HD, and 5 mol% of ethylene glycol was prepared. 12
A low melting point polyester containing 100 mol % of TA and 100 mol % of HD was prepared, and pellets were prepared from each. after that,
Molle yarn was produced in the same manner as in Example 1. In all cases, good malleable yarns were obtained which had good properties in the fiberizing process and were free from filament removal.

Comparative Examples 1 to 3 Fiber spinning was carried out in the same manner as in Example 1 using the copolymerized polyesters listed in Table 1, but in all cases, agglutination was observed between single fibers and adhesion between yarns. Occurred. Therefore, it was not possible to obtain a good mall yarn that could be evaluated.

Comparative Example 4 Instead of the heat-fusible copolymerized polyester fiber of Example I, a commercially available low-melting nylon fiber (“Nylon Erg” manufactured by Toshiku Co., Ltd.) was used and dyed in the same manner as in Example 1. I obtained a molded yarn. Thereafter, a woven fabric for evaluation was produced in the same manner as in Example 1, and the pull-out property of the molle filament yarn was evaluated. As a result, the pull-out property was severe and unfavorable results were obtained.

Below is a blank space Example 13 A polycondensation reaction was carried out at 260°C in a conventional manner using a polycondensation reactor to produce a copolymerized polyester consisting of 95 moles of TA, 5 moles of TPA, and 100 moles of 1.6 hexanediol. The mixture was extruded into a sheet shape into water and cut into pellets using a sheet cutter. The extrusion and cutting conditions were good, and pellets with a good shape were obtained. Polymer physical properties are [η] 0.90, melting point 141
The crystallization time at 5.90°C was about 5 seconds. The resulting pellets were dried at 100° C. in a vacuum dryer.

Next, the copolymerized polyester is used as a sheath, and [η is 0.6
7 polyethylene terephthalate as the core, core/sheath =
Core-sheath composite spinning with the cross section shown in FIG. 1 was carried out at a weight ratio of 50/50. Extrusion 1000 at spinning head temperature 290℃
It was wound up at m/min. The wound fibers had almost no sticking between single fibers or fiber bundles, and could be stably spun for a long period of time. The pellet transportability of the sheath component in the extruder was good and there were no problems.

This spun yarn was subjected to dry heat stretching and heat setting under the conditions of a hot roller at 75° C., a hot blast at 120° C., and a drawing rate of 3.2 times, to obtain a drawn yarn of 75 denier and 24 filaments. The spinnability and stretchability were good and there were no problems.

Next, a mall thread was produced by the method shown in FIG. Two 1#75d/24f composite fibers as presser threads,
Molle yarn was produced using polyester spun yarn 'AO/2, polyester spun yarn 30/2 as the core yarn, and polyester spun yarn 30/2 as the filament yarn. Thereafter, the molded yarn was made into a general shape, and the obtained resultant was heat-treated in a relaxed state in hot air at 180°C for 5 minutes,
The filament was thermally bonded using a pressing thread. Thereafter, the heat-treated cloth was dyed under the following conditions in that state.

Furthermore, polyester span 30/2, density 9 as warp
A plain woven fabric was produced with a density of 6 yarns/inch and 32 yarns/inch after dyeing as weft yarns. After that, the obtained fabric piece sx locm was taken, and after adhering Sellotape, a load of 5
kg (so that it becomes 0.1 kg/as') and leave it as it is for 5 minutes, then peel off the adhesive Sellotape from the fabric and observe the adhesion of the filament that has come out from the mall thread on the peeled Sellotape. did. As a result, it was confirmed that most of the adhesive adhered to the sellotape and nothing came out when removed. Furthermore, the feel of the yarn as a malleable yarn was soft and good.

Examples 14 to +5 Examples of the mixing ratio of the same heat-adhesive composite fibers in the mall yarn as in Example i3! 4 is 10 wt%, Example 15 is 20 wt%
The experiment was carried out under the same conditions as in the example except for the following.

It was found that good malleable yarns could be obtained in both cases.

Examples 16 to 22 Tests were conducted under the conditions listed in Table 2 using a copolymerized polyester having the same polymer composition as in Example 13. The results are shown in Table 2. Examples 16 and 17 were tested by changing the core/sheath composite ratio. Examples 18 to 20 were tested by changing the fiber cross-sectional shape.

Example 21 was conducted using polybutylene terephthalate as the core component polymer, and Example 22 was conducted using nylon 6. In each case, good malle yarns were obtained which had good properties in the ta elongation process and were free from filament removal.

Examples 23 to 27 A polycondensation reaction was carried out at 260°C by a conventional method using a polycondensation reactor.
In Example 24, a copolyester of 90 mol% TA, 10 mol% isophthalic acid, and 100 mol% HD was prepared, and in Example 25, 100 mol% TA,
In Example 26, a copolyester containing 95 mol% of TA, 5 mol% of isophthalic acid, 95 mol% of HD, and 5 mol% of ethylene glycol was prepared and carried out. Example 27 contains 95 mol% TA, 5 mol% sebacic acid, H
A copolymerized polyester containing 100 mol% of D was produced, and pellets were produced respectively. Thereafter, a molding yarn was produced in the same manner as in Example I3.

In all cases, good molding yarns were obtained which had good properties in the i-forming process and had no tendency to pull out the filaments.

Margin below: Compared to the malleable yarns obtained in Examples 1-12, the malleable yarns obtained in Examples 13 to 27 have almost no shrinkage after heat treatment and are more stable in shape. It was excellent. Moreover, all the mall yarns obtained in Examples 1 to 27 were extremely flexible even after heat treatment.

Comparative Examples 5 to 7 Core-sheath composite spinning was performed in the same manner as in Example 134 using the copolymerized polyesters listed in Table 2 as sheaths, but
In all cases, sticking was observed between single fibers, and sticking also occurred between yarns. Therefore, a good mall yarn that could be evaluated was not obtained.

(Effects of the Invention) As described above, the present invention uses a specific crystalline low-melting point polyester and produces a polyester-based mall yarn under predetermined conditions using fibers manufactured from the low-melting point polyester, thereby reducing process problems. To provide a polyester-based mall yarn which has a good texture and does not cause filament pull-out.

[Brief explanation of drawings]

FIGS. 1 to 13 are typical cross-sectional views when the thermoadhesive fibers constituting a part of the mall yarn of the present invention are composite fibers. FIG. 14 is a schematic diagram of an example of a molle yarn manufacturing apparatus, and FIG. 15 is a schematic diagram of a typical molle yarn.

Claims (1)

[Scope of Claims] 1. Molle yarn in which the filaments and the core yarn are made of polyethylene terephthalate fibers or polybutylene terephthalate fibers, wherein the filaments and the core yarn are made of a polyhexamethylene terephthalate polymer having a melting point of 130°C or higher. A polyester-based mall thread that is characterized by being fixed. 2. In a mole yarn whose filaments and core yarn are made of polyethylene terephthalate fibers or polybutylene terephthalate fibers, it is confirmed that the filaments or core yarn contain the following fibers (a) or (b). Characteristic polyester mall yarn. (a) A fiber made of a polyhexamethylene terephthalate polymer with a melting point of 130°C or higher; (b) A multicomponent fiber made of the polymer layer of (a) above and a thermoplastic polymer layer with a melting point higher than that of the polymer of (a) above. A multicomponent fiber, wherein 40% or more of the surface area of the multicomponent fiber is covered with the polymer of (a) above.