JP2006175129A - Base fabric for slide fastener, and slide fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base fabric for a slide fastener and the slide fastener which are excellent in wearing feeling during an exercise and smooth opening and closing property of the fastener. <P>SOLUTION: In the base fabric for the slide fastener, at least woofs consist of potential curling development polyester-based fibers consisting of two or more kinds of polyester components, whose at least one component is polytrimethylene terephthalate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a slide fastener base fabric and a slide fastener used for clothes, bags, and the like. More specifically, the present invention relates to a slide fastener base fabric and a slide fastener excellent in feeling of wearing during exercise and smooth opening and closing of the fastener.

Conventionally, as a base fabric (tape) for a slide fastener, a polyester fiber or a polyamide fiber mainly composed of polyethylene terephthalate is used, but the former is inferior in followability with a body cloth, and the latter is dimensional stability or Inferior to yellowing resistance.
In the patent document 1, the applicant of the present invention has a slide fastener that is excellent in followability with a body cloth by forming a base fabric for a slide fastener with polytrimethylene terephthalate-based fibers, and excellent in dimensional stability and yellowing resistance. Although this slide fastener was shown to be obtained, the wearing feeling (smooth feeling) particularly during exercise and the smooth opening and closing of the fastener were still insufficient.
JP 2001-204515 A

  An object of the present invention is to provide a slide fastener base fabric and a slide fastener that are excellent in feeling of wearing especially during exercise and smooth opening and closing of the fastener.

  As a result of intensive studies to solve the above problems, the present inventor has found that the stretchback property in the direction orthogonal to the slide direction of the fastener greatly affects the feeling of wear and the like, and has reached the present invention. .

That is, the invention claimed in the present application is as follows.
(1) A base fabric for a slide fastener, characterized in that at least the weft is composed of two or more kinds of polyester components, and at least one of the components is composed of a latently crimped polyester fiber that is polytrimethylene terephthalate. .
(2) A slide fastener characterized in that the base fabric is composed of two or more kinds of polyester components, and at least one of the components is composed of latently crimpable polyester fibers that are polytrimethylene terephthalate.
(3) The slide fastener according to claim 2, wherein the meshing element and / or the slider is made of polytrimethylene terephthalate resin.

  ADVANTAGE OF THE INVENTION According to this invention, the base fabric for slide fasteners and the slide fastener excellent in the feeling of wear at the time of exercise | movement and the smooth opening-closing property of a fastener are obtained.

The present invention will be specifically described below.
In the present invention, the latent crimp-expressing polyester fiber is composed of at least two kinds of polyester components (specifically, many are joined to a side-by-side type or an eccentric core-sheath type). Yes, and crimps are developed by heat treatment. There are no particular limitations on the composite ratio of the two polyester components (generally, many are in the range of 70/30 to 30/70 by mass%), the joining surface shape (there is a straight or curved shape), etc. . The total fineness is preferably 20 to 300 dtex, and the single yarn fineness is preferably 0.1 to 20 dtex, but is not limited thereto.

In the present invention, the latent crimp-expressing polyester fiber is characterized in that at least one component thereof is polytrimethylene terephthalate.
In the present invention, polytrimethylene terephthalate is a polyester having trimethylene terephthalate units as a main repeating unit, and trimethylene terephthalate units are about 50 mol% or more, preferably 70 mol% or more, more preferably 80 mol% or more, Preferably it contains 90 mol% or more. Accordingly, the total amount of the other acid component and / or glycol component as the third component is less than about 50 mol%, preferably less than 30 mol%, more preferably less than 20 mol%, and even more preferably less than 10 mol%. And polytrimethylene terephthalate contained in

  Polytrimethylene terephthalate is synthesized by combining terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst under appropriate reaction conditions. In this synthesis process, a suitable one or two or more third components may be added to form a copolyester, or a polyester other than polytrimethylene terephthalate such as polyethylene terephthalate or polybutylene terephthalate, nylon, It may be blended with trimethylene terephthalate. The content of polytrimethylene terephthalate during blending is 50% or more by mass%.

  As the third component that can be added, aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexanedicarboxylic acid, etc.), aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.), Aliphatic glycols (ethylene glycol, 1,2-propylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexanedimethanol, etc.), aliphatic glycols containing aromatics (1,4-bis (β-hydroxyethoxy)) Benzene etc.), polyether glycol (polyethylene glycol, polypropylene glycol etc.), aliphatic oxycarboxylic acid (ω-oxycaproic acid etc.), aromatic oxycarboxylic acid (p-oxybenzoic acid etc.) and the like. A compound having one or more ester-forming functional groups (benzoic acid or the like or glycerin or the like) can also be used as long as the polymer is substantially linear.

  In addition, matting agents such as titanium dioxide, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, crystallization nucleating agents such as talc, easy lubricants such as aerosil, antioxidants such as hindered phenol derivatives, Flame retardants, antistatic agents, pigments, fluorescent brighteners, infrared absorbers, antifoaming agents and the like may be contained.

  As specific examples of the latent crimp-expressing polyester fiber as described above, two types of polyester polymers having polytrimethylene terephthalate as one component as disclosed in JP-A-2001-40537 are side-by-side. The composite fiber joined to the type | mold or the eccentric core sheath type | mold is mention | raise | lifted. In the case of the side-by-side type, the melt viscosity ratio of the two types of polyester polymers is preferably 1.00 to 2.00, and in the case of the eccentric core-sheath type, the alkali weight loss rate ratio between the sheath polymer and the core polymer is three times or more. It is preferred that the polymer be fast.

  Specific polymer combinations include polytrimethylene terephthalate and polyethylene terephthalate (polyester having terephthalic acid as the main dicarboxylic acid component and ethylene glycol as the main glycol component, glycols such as butanediol, isophthalic acid, and 2. 6) Dicarboxylic acids such as 6-naphthalenedicarboxylic acid may be copolymerized, and other polymers and additives such as matting agents, flame retardants, antistatic agents, pigments, etc.) may be contained. Polytrimethylene terephthalate and polybutylene terephthalate (polyester having terephthalic acid as the main dicarboxylic acid component and 1,4-butanediol as the main glycol component, glycols such as ethylene glycol, isophthalic acid, and 2,6-naphthalene) Dicarboxylic acid etc. Carboxylic acid, etc. may be copolymerized, and other polymers and additives such as matting agents, flame retardants, antistatic agents, pigments, etc.) may be preferred. It is preferable that polytrimethylene terephthalate is disposed inside.

  Such a latently crimpable polyester fiber in which at least one of the polyester components is polytrimethylene terephthalate is disclosed in JP-B No. 43-19108 and JP-A No. 11 in addition to the above-mentioned JP-A No. 2001-40537. -189923, JP-A 2000-239927, JP-A 2000-256918, JP-A 2000-328382, JP-A 2001-81640, and the like. For example, polytrimethylene terephthalate is used as the first component, polyester such as polytrimethylene terephthalate, polyethylene terephthalate, or polybutylene terephthalate is used as the second component, and both components are arranged side by side or eccentrically to form a side-by-side type or partial type. A composite-spun core-sheath core is disclosed. In particular, a combination of polytrimethylene terephthalate and copolymerized polytrimethylene terephthalate or a combination of two types of polytrimethylene terephthalate having different intrinsic viscosities is preferable.

Furthermore, as the latent crimp-expressing polyester fiber, those having the following physical properties are preferable for achieving the object of the present invention.
The initial tensile resistance is preferably 10 to 30 cN / dtex, more preferably 20 to 30 cN / dtex, and still more preferably 20 to 27 cN / dtex. Within this range, fibers with a soft texture can be easily produced.

The heat shrinkage stress at 100 ° C. is preferably 0.1 to 0.5 cN / dtex, more preferably 0.1 to 0.4 cN / dtex, and still more preferably 0.1 to 0.3 cN / dtex. Within this range, the production is easy and the object of the present invention is sufficiently achieved.
As more preferable physical properties, the stretch elongation rate of the actual crimp is preferably 10 to 100%, more preferably 10 to 80%, and still more preferably 10 to 60%. Within this range, the production is easy and the object of the present invention is sufficiently achieved.

The stretch elastic modulus of the actual crimp is preferably 80 to 100%, more preferably 85 to 100%, and still more preferably 85 to 97%. Within this range, the production is easy and the object of the present invention is sufficiently achieved.
The expansion / contraction elongation after the hot water treatment is preferably 100 to 250%, more preferably 150 to 250%, and still more preferably 180 to 250%. Within this range, the production is easy and the object of the present invention is sufficiently achieved.

The stretch elastic modulus after the hot water treatment is preferably 90 to 100%, more preferably 95 to 100%. Within this range, the object of the present invention is sufficiently achieved.
Preferred examples of the latent crimp-forming polyester fiber having such characteristics include a composite fiber composed of single yarns in which two types of polytrimethylene terephthalates having different intrinsic viscosities are combined in a side-by-side manner. It is done. The difference in intrinsic viscosity between the two types of polytrimethylene terephthalate is preferably 0.05 to 0.5 (dl / g), more preferably 0.1 to 0.45 (dl / g), and still more preferably 0. .15 to 0.45 (dl / g). For example, when the intrinsic viscosity on the high viscosity side is selected from 0.7 to 1.3 (dl / g), the intrinsic viscosity on the low viscosity side is selected from 0.5 to 1.1 (dl / g). It is preferable.

  Further, the intrinsic viscosity of the composite fiber itself, that is, the average intrinsic viscosity is preferably 0.7 to 1.2 (dl / g), more preferably 0.8 to 1.2 (dl / g), 0.85 To 1.15 (dl / g) is more preferable, and 0.9 to 1.1 (dl / g) is particularly preferable.

  In addition, the value of the intrinsic viscosity as used in the present invention refers to the intrinsic viscosity of the spun yarn, not the polymer used. The reason for this is that polytrimethylene terephthalate is more susceptible to thermal decomposition than polyethylene terephthalate and the like, and even if a polymer with a high intrinsic viscosity is used, the intrinsic viscosity decreases due to thermal decomposition in the spinning process. This is because it is difficult to maintain the intrinsic viscosity and the intrinsic viscosity difference of the polymer as they are.

  In the present invention, the methods disclosed in the above-mentioned various Japanese Unexamined Patent Publications can be applied to the spinning of latently crimpable polyester-based fibers. For example, an undrawn yarn is wound at a winding speed of 3000 m / min or less. After obtaining, preferred is a method of drawing at about 2 to 3.5 times, but a straight-drawing method (spin draw method) in which the spinning and drawing steps are directly connected, and a high-speed spinning method (spin take) at a winding speed of 5000 m / min or more. Up method) may be adopted.

  Moreover, although the form of a fiber may be a long fiber or a short fiber, a long fiber is preferable. Also, it may be uniform or thick in the length direction, and in the cross section, round shape, triangle shape, L shape, T shape, Y shape, W shape, eight leaf shape, flatness (flatness 1.3) ~ 4, W type, I type, Boomerang type, wave type, skewer type, eyebrows type, rectangular parallelepiped type, etc.), polygonal type such as dogbone type, multileaf type, hollow type Or an irregular shape.

  In addition, there are spun yarns such as multifilament yarns, false twisted yarns, pre-twisted false twisted yarns, air jet yarns, ring spun yarns, open-end spun yarns in the present invention. Such a false crimped polyester fiber false twisted yarn is particularly preferred for achieving the object of the present invention.

  The apparent crimp elongation of the false twisted yarn is preferably 70% or more, particularly 70 to 300%, more preferably 100 to 300%, still more preferably 120 to 300%. The actual crimp elastic modulus is preferably 80 to 100%, more preferably 82 to 100%, and still more preferably 85 to 100%. The crimp elongation of the false twisted yarn is preferably 100 to 400%, more preferably 120 to 400%. Moreover, it is preferable that a crimp elastic modulus is 80 to 100%, More preferably, it is 90 to 100%.

  The false twisting method for obtaining the false twisted yarn is not particularly limited, and a pin type, a friction type, a nip belt type, an air twist type, and the like can be employed. Of these, pin type and nip belt type are preferable. In addition, in order to achieve the object of the present invention, the false twisted yarn uses a so-called one-heater false twisted yarn (non-set type) rather than a so-called two-heater false twisted yarn (set type). preferable.

  The yarn temperature at the false twist heater outlet is preferably 100 to 200 ° C. The number of false twists (T1) is preferably 21000 to 36000, and more preferably in the range of 25000 to 34000.

T1 (T / m) = K1 (fineness of raw yarn: dtex) ^0.5
In particular, in the present invention, when this false twisted yarn is a POY drawn false twist yarn, it is most preferable that a woven fabric having excellent quality can be obtained.
That is, the most suitable example is a POY-drawn false twisted yarn of a latently crimped polyester fiber.
POY is generally called a partially oriented yarn, a partially oriented undrawn yarn, a highly oriented undrawn yarn, or the like.

The stretched false twisted yarn of POY is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2001-20136 and 2001-164433, and is preferably 60% or more, particularly 70% or more, and further 80%. Thus, POY having a breaking elongation of 250% or less, particularly 200% or less, and further 180% or less is preferable.
The single yarn fineness of the POY drawn false twisted yarn is preferably 0.5 to 5 dtex, more preferably 1 to 2.5 dtex.
Such POY is obtained by spinning at a spinning speed of 2000 to 4500 m / min, and in particular, a product obtained by a direct stretching method (spin draw method) in which a spinning and drawing process is directly connected is suitable.
Further, as the drawing false twisting conditions, the draw ratio is preferably 1.05 to 2.00 times, particularly preferably 1.05 to 1.70 times, and the false twist number T1 is 23,000. It is preferable that it is -36000, More preferably, it is preferable that it is the range of 27000-34000.

The yarn temperature at the false twist heater outlet is preferably 100 to 200 ° C. Further, one heater false twisted yarn (non-set type) is more preferable than two heater false twist yarn (non-set type).
As the false twisting method, false twisting yarns by any method such as pin type, friction type, nip belt type, air twist type, etc. may be used.
The base fabric for slide fastener of the present invention is characterized in that such latent crimp-expressing polyester fiber is used for at least the weft.

The latent crimp-expressing polyester fiber may be entangled as necessary, and the number of entanglements is 5 / m or more, preferably 10 / m or more, particularly 15 / m or more, and further 20 / m. m or more, 200 pieces / m or less, 190 pieces / m or less, 180 pieces / m or less.
Moreover, you may use it by twisting as needed, and use normally within the range of 600 T / m or less.
In the present invention, when such a latent crimp-expressing polyester fiber is used for at least the weft, it is mixed with other fiber materials within the range of 50% by mass or less, for example, mixed fiber, twisted, or other fiber. Alternatively, 1 to 3 materials may be inserted alternately.
The fiber material to be mixed is not particularly limited, and polyester fibers such as polytrimethylene terephthalate, polybutylene terephthalate and polyethylene terephthalate, polyamide fibers such as nylon 6 and nylon 66, synthetic fibers such as acrylic fibers and acetate fibers. Cellulose fibers such as natural fibers such as cotton, wool, cupra, rayon, and purified cellulose fibers are used. In addition, the yarn form includes bulky processed yarn such as untwisted yarn, twisted yarn, false twisted yarn, etc., and may be a composite yarn in which one or more of the above-mentioned various materials are mixed. Any of composite false twists may be used.

On the other hand, as the fiber material used for the warp, a latent crimp-expressing polyester fiber used for the weft may be used, or the fiber materials exemplified above may be used.
The weave structure may be any of a single weave such as flat, vertical and flat, twill, feather double, and satin, a layered structure, a pile structure, and a twine.
As for the density of the woven fabric, the preferred finishing cover factor (CF) is 500 to 1500 for the warp CF and 500 to 1500 for the weft CF. The total CF (warp CF + weft CF) is preferably 1000 to 2500.

Warp CF = Warn density (main / 2.54 cm) × Da ^0.5
Weft CF = Weft density (main / 2.54 cm) × Db ^0.5
Da: Total fineness of warp (dtex)
Db: Total weft fineness (dtex)
The slide fastener of the present invention is one in which a mesh element and a slider for meshing the mesh element are mounted on the above-mentioned base fabric. However, as the material of the mesh element and the slider, product dyeing is possible and the same color is obtained. The polytrimethylene terephthalate obtained is preferred.

The present invention will be described based on examples.
The measurement method and evaluation method used in the present invention are as follows.
(1) Intrinsic viscosity Intrinsic viscosity [η] (dl / g) is a value determined based on the definition of the following equation.

[Η] = lim (ηr−1) / C
C → 0
Ηr in the definition is the viscosity of a diluted solution of polytrimethylene terephthalate yarn or polyethylene terephthalate yarn dissolved in an o-chlorophenol solvent with a purity of 98% or more, divided by the viscosity of the solvent measured at the same temperature. Which is defined as relative viscosity. C is the polymer concentration expressed in g / 100 ml.

In addition, since it is difficult to measure the intrinsic viscosity of each composite multifilament using polymers having different intrinsic viscosities, two types of polymers are used under the same spinning conditions as the composite multifilament. The intrinsic viscosity measured using the yarn obtained by spinning alone was used as the intrinsic viscosity constituting the composite multifilament.
(2) Initial tensile resistance degree JIS L 1013 chemical fiber filament yarn test method According to the initial tensile resistance degree test method, a tensile test was performed by applying an initial load of 0.0882 cN / dtex per unit fineness of the sample. The initial tensile resistance (cN / dtex) is calculated from the load-elongation curve. Ten samples are collected and measured, and the average value is obtained.
(3) Stretch elongation rate and stretch elasticity modulus Measured according to the stretchability test method A of the JIS L 1090 synthetic fiber filament bulky processed yarn test method, the stretch elongation rate (%) and the stretch elasticity modulus (%) calculate. Ten samples are collected and measured, and the average value is obtained.

The stretch elongation rate and the stretch elastic modulus of the actual crimp are measured after leaving the sample unwound from the winding package in an environment of a temperature of 20 ± 2 ° C. and a relative humidity of 65 ± 2% for 24 hours. As the stretch elongation rate and stretch elastic modulus after the hot water treatment, a sample which was immersed in 98 ° C. hot water with no load for 30 minutes and then naturally dried and dried for 24 hours without load is used.
(4) Thermal shrinkage stress Using a thermal stress measuring device (trade name KE-2, manufactured by Kanebo Engineering Co., Ltd.), the sample is cut into a length of 20 cm, ends are tied, a ring is formed, and the initial load is 0. The shrinkage stress is measured under the condition of 0.04 cN / dtex and the heating rate is 100 ° C./min, and the heat shrinkage stress at 100 ° C. is read from the change curve of the heat shrinkage stress with respect to the obtained temperature.
(5) The actual crimped elongation and the apparent crimped elastic modulus of the false twisted yarn Using the tensile tester manufactured by Shimadzu Corporation, the false twisted yarn was subjected to an initial load of 0.0009 cN / dtex at a grip interval of 10 cm. Then, the film was stretched at a tensile speed of 10 cm / min, and the elongation (%) when reaching a stress of 0.0882 cN / dtex was defined as the actual crimp elongation rate.

  Then, after shrinking again to the grip interval of 10 cm at the same speed, a stress-strain curve is drawn again, and the elongation until the initial load stress is expressed is defined as the residual elongation (B). The actual crimp elastic modulus was obtained by the following formula.

Apparent crimp elastic modulus (%) = [(10−B) / 10] × 100
(6) Crimp elongation rate and crimp elastic modulus of false twisted yarn After the false twist yarn unwound from the winding package was immersed in 98 ° C hot water for 20 minutes under no load, Except that a sample dried for 24 hours at (5) is measured by the same method as the measurement of the actual crimp elongation and the actual crimp elastic modulus. did.

(7) Wearing feeling evaluation at the time of exercise Aerobics by 10 skilled persons was performed for 30 minutes, and the wearing feeling at the time of the exercise was evaluated by the average according to the following criteria.
Grade 5: Particularly excellent in wearing feeling and smooth opening and closing of fasteners. Class 3; Good feeling in wearing and smooth opening and closing of fasteners. Grade 1: Greatly inferior in wearing feeling and smooth opening and closing of fasteners.
[Reference example]

Production of Latent Crimp-Expressing Polyester Fibers Side-by-side composite multifilaments having different intrinsic viscosities were produced according to Production Examples 1 to 3 below.

(Production Example 1)
Two types of polytrimethylene terephthalate with different intrinsic viscosities are extruded into a side-by-side mold at a mass ratio of 1: 1 using a side-by-side compound spinning spinner, and undrawn yarn is spun at a spinning temperature of 265 ° C. and a spinning speed of 1500 m / min. Obtained. Next, the hot roll temperature is 55 ° C., the hot plate temperature is 140 ° C., the stretching speed is 400 m / min, the stretching ratio is set so that the fineness after stretching is 84 dtex, and then the side-by-side type composite multifilament of 84 dtex / 36f is formed. Obtained.
The resulting composite multifilament had an intrinsic viscosity of 0.90 on the high viscosity side and 0.70 on the low viscosity side. Table 1 shows the initial tensile resistance, the stretch elongation / stretch elastic modulus of the actual crimp, the stretch elongation / stretch elastic modulus after the hot water treatment, and the heat shrinkage stress at 100 ° C.

(Production Example 2)
A 84 dtex / 36 f side-by-side composite multifilament was obtained in the same manner as in Production Example 1. The resulting composite multifilament had an intrinsic viscosity of 0.88 on the high viscosity side and 0.70 on the low viscosity side. Table 1 shows the initial tensile resistance, the stretch elongation / stretch elastic modulus of the actual crimp, the stretch elongation / stretch elastic modulus after the hot water treatment, and the heat shrinkage stress at 100 ° C.

(Production Example 3)
In Production Example 1, an 84 dtex / 36f side-by-side composite multifilament was obtained in the same manner as in Production Example 1 except that polytrimethylene terephthalate and polyethylene terephthalate having different intrinsic viscosities were used. The resulting composite multifilament had an intrinsic viscosity of 0.98 on the polytrimethylene terephthalate side and 0.60 on the polyethylene terephthalate side. Table 1 shows the initial tensile resistance, the stretch elongation / stretch elastic modulus of the actual crimp, the stretch elongation / stretch elastic modulus after the hot water treatment, and the heat shrinkage stress at 100 ° C.

[Examples 1 to 3]
Using the composite fibers obtained in Production Examples 1 to 3, provisional twisting was performed by IVF-338 manufactured by Ishikawa Seisakusho Co., Ltd. with a first heater temperature of 170 ° C., a twist direction of Z twist, and a false twist number of 3200 T / m. A twisted yarn was obtained. The false twisted yarns of Examples 1 to 3 have an apparent crimp elongation of 180 to 200%, an actual crimp elastic modulus of 85 to 90%, a crimp elongation of 200 to 250%, and a crimp elastic modulus of 85 to 93%. there were.
The fiber obtained in Production Example 1 was used in Example 1, the fiber obtained in Production Example 2 was used in Example 2, and the fiber obtained in Production Example 3 was used in Example 3.
The obtained false twisted yarn is used as a weft as a double yarn. A 167 dtex / 72f polyethylene terephthalate false twisted yarn (false twist direction: Z twist) is used as a warp yarn, and a width as a base fabric for a fastener. A 2 cm tape-shaped woven fabric was produced (warp CF = 775, weft CF = 905).

A fastener was prepared by combining this woven fabric with an engagement element molded with polytrimethylene terephthalate and a slider, and product dyeing was performed by a conventional method.
An outer jacket for gymnastics was prepared by attaching the obtained fastener to a polyester smooth knitted fabric.
The wearing feeling evaluation at the time of the exercise | movement of the fastener produced in Examples 1-3 was all 4.5 grades or more.

[Comparative Example 1]
The evaluation of wearing feeling during exercise of the fastener obtained in the same manner as in Example 1 except that a twisted yarn of 84 dtex / 36f polytrimethylene terephthalate fiber (one component) was used as the weft. It was a grade.

[Example 4]
The evaluation of wearing feeling during the exercise of the fastener obtained in the same manner as in Example 1 except that the raw yarn of the fiber obtained in Production Example 1 was used as a weft yarn was used as a fourth grade.

[Example 5]
In Production Example 1, POY having a breaking elongation of 100% was obtained by changing the spinning speed.
Next, using a 33H false twist machine manufactured by false twisting machine; Murata Machinery Co., Ltd., the draw ratio was set so that the breaking elongation of the false twisted yarn was 35%, and the yarn at the false twist heater outlet Stretching false twisting was performed at a strip temperature of 160 ° C. and a false twist number of 3200 T / m to obtain a stretched false twisted yarn of 84 dtex / 36 f of one heater.
The obtained drawn false twisted yarn had an actual crimp elongation of 200%, an actual crimp elastic modulus of 90%, a crimp elongation of 240%, and a crimp elastic modulus of 91%.
The fastener feeling obtained during the exercise of the fastener obtained in the same manner as in Example 1 except that this false twisted yarn was used as the weft was grade 5.

  The base fabric for slide fastener and the slide fastener of the present invention are particularly excellent in feeling of wearing during exercise and smooth opening and closing of the fastener, and are particularly useful for apparel use during intense sports and work.

Claims (3)

  A base fabric for a slide fastener, characterized in that at least the weft is composed of two or more kinds of polyester components, and at least one of the components is composed of a latently crimpable polyester fiber that is polytrimethylene terephthalate.   A slide fastener characterized in that the base fabric is composed of two or more kinds of polyester components, and at least one of the components is composed of a latently crimpable polyester fiber of polytrimethylene terephthalate.   The slide fastener according to claim 2, wherein the meshing element and / or the slider is made of polytrimethylene terephthalate resin.