JP2003325208A - Hook-and-loop fastener female material and hook-and- loop fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hook-and-loop fastener female material having excellent durability of attachment and detachment strength and hook-and-loop fasteners. <P>SOLUTION: The hook-and-loop fastener female material includes &ge;10 mass% latent crimp developable polyester fibers satisfying the following (a) to (c): (a) the degree of resistance to initial tension is 10 to 30 cN/dtex, (b) the elongation in stretch of present crimp is 10 to 100% and the modulus of elasticity in stretch of present crimp is 80 to 100% and (c) the heat shrinkage stress is 0.1 to 0.5 cN/dtex at 100&deg;C. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female surface fastener and a surface fastener made of a specific fiber. More specifically, the present invention relates to a surface fastener female member and a surface fastener having excellent durability in attachment / detachment strength.

[0002]

2. Description of the Related Art A surface fastener composed of a male material having a hook portion such as a hook type or a mushroom type and a female material of a loop type is
It is used for various purposes because it can be easily attached and detached and the engaging force between the male member and the female member is appropriate, but it has a drawback that the engaging force gradually decreases with repeated attachment and detachment.
The cause of the decrease in the engaging force is mainly in the female material, and the constituent fibers of the female material (generally nylon fibers are often used)
, For example, the use of nylon fibers of various physical properties, the combined use of heat-adhesive fibers, the texture of the female material, the basis weight, the loop height, the number of loops, etc. have been studied, but no major improvement has been observed.
The applicant previously proposed a surface fastener female material and a surface fastener excellent in durability of attachment / detachment by composing the surface fastener female material with polytrimethylene terephthalate fiber in JP-A-11-253209. However, a higher level is required.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a surface fastener female member and a surface fastener which are excellent in attachment / detachment strength and durability.

[0004]

Means for Solving the Problems As a result of various studies for solving the above problems, the inventors have found that the purpose can be achieved by using a specific fiber, and have completed the present invention. It was That is, the present invention is a surface fastener female material characterized by containing 10% by mass or more of latent crimp-expressing polyester fiber satisfying the following (a) to (c). (A) Initial tensile resistance is 10 to 30 cN / dtex,
(B) The expansion and contraction rate of the actual crimp is 10 to 100%, and
The expansion and contraction elastic modulus of the actual crimp is 80 to 100%, and (c) 1.
Thermal shrinkage stress at 00 ° C is 0.1 to 0.5 cN / dt
ex.

The present invention will be described in detail below. The latent crimp developable polyester fiber in the present invention is composed of at least two kinds of polyester components (specifically,
They are often joined in a side-by-side type or an eccentric core-sheath type) and develop crimps by heat treatment. Composite ratio when composed of two types of polyester components (generally, 70% to 30% by mass%).
There is no limitation on the shape of the joint surface (there is a straight or curved shape), which is often within the range of 30/70).

The latent crimp-developing polyester fiber has a total fineness of 20 to 300 dtex and a single yarn fineness of 0.5 to 20 dt.
Ex is preferable, but not limited thereto. The initial tensile resistance of the latent crimp developable polyester fiber in the present invention needs to be 10 to 30 cN / dtex, preferably 20 to 30 cN / dtex, and more preferably 20 to 27 cN / dtex. When the initial tensile resistance exceeds 30 cN / dtex, it is difficult to obtain a surface fastener having a soft texture, and it is difficult to manufacture fibers having a tensile resistance of less than 10 cN / dtex.

The expansion and contraction elongation rate of the actual crimp of the latent crimp-developing polyester fiber in the present invention needs to be 10 to 100%, preferably 10 to 80%, more preferably 10 to 60%. When the expansion / contraction elongation ratio of the actual crimp is less than 10%, the durability of the surface fastener in the attachment / detachment strength becomes insufficient, and it is difficult to produce fibers exceeding 100%. Furthermore,
The expansion and contraction elastic modulus of the actual crimp must be 80 to 100%, preferably 85 to 100%, more preferably 85 to 100%.
97%. When the expansion and contraction elastic modulus of the actual crimp is less than 80%, the durability of the hook-and-loop fastener in the attachment / detachment strength becomes insufficient,
The production of fibers exceeding 100% is difficult.

Furthermore, the heat shrinkage stress at 100 ° C. of the latent crimp-developing polyester fiber of the present invention is 0.1.
It is necessary to be 0.5 to 0.5 cN / dtex, preferably 0.1 to 0.4 cN / dtex, and more preferably 0.1.
~ 0.3 cN / dtex. If the heat shrinkage stress at 100 ° C. is less than 0.1 cN / dtex, the durability of the hook-and-loop fastener will be insufficient, resulting in 0.5 cN / dt.
It is difficult to produce fibers exceeding ex.

The expansion and contraction rate of the latent crimp-developing polyester fiber of the present invention after hot water treatment is preferably 100 to 250%, more preferably 150 to 250.
%, Most preferably 180-250%. If the expansion / contraction elongation ratio after hot water treatment is less than 100%, the durability of the surface fastener in the attachment / detachment strength tends to be insufficient, and it is difficult to produce fibers exceeding 250%. The elastic modulus after hot water treatment is preferably 90 to 100%, more preferably 95 to 100%. Expansion elastic modulus after hot water treatment is 90
If it is less than%, the durability of the attachment / detachment strength of the surface fastener tends to be insufficient. Examples of latent crimp-developing polyester fibers having such characteristics include composite fibers composed of single yarns in which two types of polytrimethylene terephthalate having different intrinsic viscosities are composited side-by-side with each other.

The difference in intrinsic viscosity between the two types of polytrimethylene terephthalate is preferably 0.05 to 0.40 (dl / g), more preferably 0.10 to 0.35.
(Dl / g), most preferably 0.15 to 0.35 (d
1 / g). For example, the intrinsic viscosity on the high viscosity side is 0.7
When selected from 0 to 1.30 (dl / g), it is preferable to select the intrinsic viscosity on the low viscosity side from 0.50 to 1.10 (dl / g). Intrinsic viscosity on the low viscosity side is 0.80
(Dl / g) or more is preferable, and 0.85 is more preferable.
~ 1.00 (dl / g), most preferably 0.90
It is 1.00 (dl / g).

The intrinsic viscosity of the composite fiber itself, that is,
The average intrinsic viscosity is preferably 0.70 to 1.20 (dl / g), more preferably 0.80 to 1.20 (dl / g), most preferably 0.85 to 1.15 (dl / g). ,
Further, 0.90 to 1.10 (dl / g) is preferable. The value of the intrinsic viscosity in the present invention refers to the 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 when a polymer having a high intrinsic viscosity is used, the intrinsic viscosity is significantly reduced by thermal decomposition, and in a composite multifilament, both This is because it is difficult to maintain a large difference in intrinsic viscosity. Polytrimethylene terephthalate is a polyester having a trimethylene terephthalate unit as a main repeating unit, and the trimethylene terephthalate unit is 50 mol% or more, preferably 70 mol%. Above, more preferably 80 mol% or more, and most preferably 90 mol% or more. Therefore, the total amount of the other acid component and / or glycol component as the third component is 50 mol% or less, preferably 30 mol% or less, more preferably 20 mol% or less, and most preferably 10 mol% or less. Included polytrimethylene terephthalate contained.

Polytrimethylene terephthalate is synthesized by combining terephthalic acid or a functional derivative thereof and trimethylene glycol or a functional derivative thereof in the presence of a catalyst under appropriate reaction conditions. In this synthetic process, a suitable one or more kinds of third components may be added to obtain a copolyester, or a polyester other than polytrimethylene terephthalate such as polyethylene terephthalate and polybutylene terephthalate, nylon and the like, and polytriene. After the synthesis with methylene terephthalate separately, both may be blended. The content of polytrimethylene terephthalate at the time of blending is 50% by mass or more.

As the third component to 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 glycols (polyethylene glycol) , Polypropylene glycol, etc.), aliphatic oxycarboxylic acids (ω-oxycaproic acid, etc.), aromatic oxycarboxylic acids (P-oxybenzoic acid, etc.), and the like. Also, a compound having one or three or more ester-forming functional groups (benzoic acid or the like or glycerin or the like) can be used within a range in which the polymer is substantially linear.

Further, matting agents such as titanium dioxide, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, crystallization nucleating agents such as talc, slip agents such as aerosil, and anti-hindering agents such as hindered phenol derivatives. An oxidizing agent, a flame retardant, an antistatic agent, a pigment, a fluorescent whitening agent, an infrared absorbing agent, an antifoaming agent, etc. may be contained. The method for producing the latent crimp-developing polyester fiber used in the present invention is disclosed in the above-mentioned Japanese Patent Laid-Open No. Hei 9 (1999) -134, for example, after obtaining an undrawn yarn at a winding speed of 3000 m / min or less, 2-3. It is preferable to perform the twisting at about 5 times, but the direct spinning method (spin draw method) in which the spinning-twisting step is directly connected, and the high speed spinning method (spin take-up method) with a winding speed of 5000 m / min or more are adopted. Good.

The form of the fibers may be long fibers or short fibers, but long fibers are preferred. Further, it may be uniform or thick or thin in the length direction. The cross-sectional shape is round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, eight-lobed, flat (having a flatness of about 1.3 to 4, W-shaped, I-shaped, Bou-Melan type,
It may be a corrugated type, a skewered dumpling type, an eyebrow type, a rectangular parallelepiped type, etc.), a polygonal type such as a dogbone type, a multileaf type, a hollow type or an irregular type. Examples of the yarn form include spun yarn such as ring spun yarn, open-end spun yarn, multifilament raw yarn (including ultrafine yarn), sweet twisted yarn to strong twisted yarn, mixed fiber yarn, false twisted yarn (POY stretched false twisted yarn). Included), fluid injection processed yarn and the like.

If necessary, within a range of 30% by mass or less, other fibers such as natural fibers and synthetic fibers typified by wool and cotton are mixed-spun (silospan, silofil, etc.) and entangled mixed fibers (with highly shrinkable yarn). Different shrinkage mixed yarns, etc.), mixed twists, composite false twists (elongation difference false twists, etc.), and two-feed fluid injection processing may be used for mixing.

In the present invention, the female member for the surface fastener is composed of the latent crimp-developing polyester fiber as described above. It is necessary that the female material for surface fastener contains 10% by mass or more of the latent crimp-expressing polyester fiber of the present invention, preferably 20% by mass or more, and more preferably 30% by mass or more. Especially, when the female material for the surface fastener is made of knitted fabric, the content of the latent crimp-expressing polyester fiber needs to be 10% by mass or more, preferably 15% by mass or more, and more preferably 20% by mass or more. Yes, in the case of woven or non-woven fabric, preferably 20% by mass
The above is more preferably 30 mass% or more, and most preferably 40 mass% or more.

The fibers used when mixed with the latent crimp developable polyester fibers include, for example, wool, natural fibers typified by cotton, nylon fibers such as nylon 6, nylon 66, polyethylene terephthalate, polytrimethylene terephthalate. Polyester fiber such as polybutylene terephthalate, polyolefin fiber, various fibers such as heat-bonding fiber (in various forms such as raw yarn, bulky yarn, short fiber and long fiber), nylon fiber and polytrimethylene terephthalate fiber Is preferred. When dyeing a material used in combination with a nylon fiber, so-called one-sided dyeing, in which only the nylon fiber is dyed and the latent crimp-expressing polyester fiber is not dyed, may be used.

The mixed form may be mixed at the yarn stage,
It is preferable to mix them on a machine such as a mixed knitting and needle punching, and it is more preferable to mix them on the machine. Examples of the base fabric of the female material of the surface fastener include knitted fabrics, non-woven fabrics, and composites thereof. From the viewpoint of durability, a knitted fabric is preferable, and a knitted fabric that is easy to engage with the hook portion is particularly preferable. In the case of knitting, a tricot knitting machine, a Russell knitting machine, a circular knitting machine or the like can be used as a knitting machine. Depending on the fineness of the yarn to be used and the purpose of the product, the fineness, knitting model, gauge, etc. are appropriately selected. As the knitting structure, a tricot knitting machine has a half-structure of a reed knitting structure, a satin structure, and a change structure due to a combination of these structures, a Russell knitting machine has a power net structure, a satin net structure, and a circular knitting machine has a plain cloth. , Smooth, milling tissue and the like, but are not limited thereto.

Particularly, in the warp knitted fabric, a fiber other than the latent crimp-expressing polyester fiber is used for the front side, and the latent crimp-expressing polyester fiber is used for the back (in this case, the closed stitch is preferable to the open stitch. The direction of swinging of the back and the back may be the same direction or different directions.) Since the latent crimp-expressing polyester fiber is located in the intermediate layer of the knit, it is sufficient to dye only the fiber used for the front side. At this time, a nylon monofilament of about 5 to 25 dtex may be used for the middle or the back, and the swing may be the same as or different from the front and back swing directions.

As the density of the knitted fabric, the wale number is 20 to 6
0, the number of courses 40 to 90 is preferable, and as a gauge,
22-36 gauge is preferred. The base cloth of the female material for the hook-and-loop fastener is dyed after raising or dyeing is performed according to a conventional method. The surface fastener female material of the present invention is generally
A hook-and-loop or mushroom-shaped hook, preferably a hook-shaped male member, and a pair of hook-and-loop fasteners to form a surface fastener.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples. The evaluation method used in the present invention is as follows. (1) Evaluation of Engaging Force The monitor 1 measures the engaging force after repeating attachment / detachment of the male material having the hook-shaped hook and the female material of the surface fastener 5000 times.
Sensory evaluation is carried out by 0 persons on a scale of 5 and evaluated by a weighted average value. Grade 5: Almost no decrease in engagement force. Class 3: Engaging force is reduced. 1st class; Engaging force is greatly reduced.

(2) Intrinsic viscosity Intrinsic viscosity [η] (dl / g) is a value obtained based on the definition of the following equation. [Η] = lim (ηr−1) / C C → 0 In the formula, ηr is 35 ° C. of a diluted solution of polytrimethylene terephthalate yarn or polyethylene terephthalate yarn dissolved in an o-chlorophenol solvent having a purity of 98% or more. Is a value obtained by dividing the viscosity of the above by the viscosity of the above solvent measured at the same temperature, and is defined as the relative viscosity. C is g
/ 100 ml polymer concentration. In addition, since it is difficult to measure the intrinsic viscosities of the composite multifilaments using polymers having different intrinsic viscosities, it is difficult to measure the respective intrinsic viscosities of the composite multifilaments. The intrinsic viscosity measured by using the yarn obtained by spinning the fibers independently was defined as the intrinsic viscosity constituting the composite multifilament.

(3) Initial Tensile Resistance A tensile test was conducted by applying an initial load of 0.0882 cN / dtex per unit fineness of the sample in accordance with the test method of initial tensile resistance of JIS L 1013 chemical fiber filament yarn test method. The initial tensile resistance (cN / dtex) is calculated from the obtained load-elongation curve. A sample is arbitrarily sampled at 10 points and measured, and an average value of 10 points is obtained.

(4) Stretching Elongation Ratio, Stretching Elasticity Modulus The stretching elongation ratio (%) and the stretching elasticity modulus (%) are measured according to the stretchability test method A of JIS L 1090 synthetic fiber filament bulky processed yarn test method. %) Is calculated. A sample is arbitrarily sampled at 10 points and measured, and an average value of 10 points is obtained. The expansion / contraction elastic modulus and elastic expansion / contraction modulus of the actual crimp were measured at a temperature of 20 ± 20% for the sample unwound from the winding package.
The measurement was performed after standing for 24 hours in an environment of 2 ° C. and a relative humidity of 65 ± 2%. The stretch elongation and stretch elastic modulus after hot water treatment are as follows:
An average value is similarly obtained using a sample which is naturally dried and dried for 24 hours without load.

(5) Thermal shrinkage stress Using a thermal stress measuring device (Kanebo Engineering Co., Ltd., trade name KE-2), a sample was cut into a length of 20 cm, and both ends were connected to form a ring and loaded into the measuring device. The shrinkage stress is measured under the conditions of an initial load of 0.044 cN / dtex and a heating rate of 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. A sample is arbitrarily sampled at 10 points and measured, and an average value of 10 points is obtained.

[0027]

[Reference Example 1] Production of latent crimp-developing polyester fiber Side-by-side composite multifilaments having different intrinsic viscosities were produced by the following Production Examples 1 to 4. (Production Example 1) Using a side-by-side type composite spinning spinneret, two types of polytrimethylene terephthalate having different intrinsic viscosities were extruded in a side-by-side type at a mass ratio of 1: 1 at a spinning temperature of 265 ° C and a spinning speed of 1500 m / min. It was wound up to obtain an undrawn yarn. Then hot roll temperature 55
℃, hot plate temperature 140 ℃, stretching speed 400m /
Minutes, the draw ratio was set so that the fineness after drawing was 56 dtex, and twisted to obtain a 56 dtex / 12f side-by-side type composite multifilament.

The intrinsic viscosity of the obtained composite multifilament was 0.90 on the high viscosity side and 0.70 on the low viscosity side. Initial tensile resistance, expansion / contraction elastic modulus of visible crimp / expansion / contraction elastic modulus, expansion / contraction elastic modulus / contraction elastic modulus after hot water treatment, and 100
Table 1 shows the heat shrinkage stress at ° C. (Manufacturing Example 2) 84 dtex is manufactured in the same manner as in Manufacturing Example 1 above.
A / 12f side-by-side composite multifilament was obtained. The intrinsic viscosity of the obtained composite multifilament was 0.88 on the high viscosity side and 0.70 on the low viscosity side. Initial tensile resistance, expansion / contraction elastic modulus of visible crimp / expansion / contraction elastic modulus, expansion / contraction elastic modulus / contraction elastic modulus after hot water treatment, and 100
Table 1 shows the heat shrinkage stress at ° C.

Production Example 3 56 dtex / 12f was prepared in the same manner as in Production Example 1 using two kinds of polytrimethylene terephthalate having different intrinsic viscosities from those in Production Example 1.
A side-by-side type composite multifilament was obtained.
The intrinsic viscosity of the obtained composite multifilament was 0.86 on the high viscosity side and 0.69 on the low viscosity side. Table 1 shows the initial tensile resistance, the expansion / contraction elastic modulus of the actual crimp, the elastic expansion / contraction elastic modulus after hot water treatment, and the thermal contraction stress at 100 ° C.

(Production Example 4) 56 dtex / 12 was prepared by using two kinds of polyethylene terephthalate having different intrinsic viscosities.
A side-by-side type composite multifilament of f was obtained. The intrinsic viscosity of the obtained composite multifilament was 0.66 on the high viscosity side and 0.50 on the low viscosity side. Table 1 shows the initial tensile resistance, the expansion / contraction elastic modulus of the actual crimp, the elastic expansion / contraction elastic modulus after hot water treatment, and the thermal contraction stress at 100 ° C.

[0031]

Examples 1 to 3 and Comparative Example 1 Using a 28 GG tricot knitting machine, 105 dtex / 12f nylon 6 multifilament yarn was fronted (texture; 1-0 / 3-4).
In addition, the satin tricot was knitted on the back (texture; 1-2 / 1-0; closed eye) using the composite filament obtained in each of the above-described production examples for 56 courses on the machine. An example using the fibers of Production Example 1 is Example 1, Production Example 2 is Example 2, Production Example 3 is Example 3, and Production Example 4 is Comparative Example 1.

The obtained knitted fabric was preset (140 ° C.) with a certain width according to a conventional method, scoured, and dyed in one bath (110 ° C. jet dyeing machine). Then, after dipping and nipping in a liquid containing 1% by mass of a wax-based raising agent, an appropriate amount was adhered, and a dry spread was performed. Subsequently, the knitted fabric surface was raised using a needle cloth raising machine, and then finish setting was performed. further,
The back surface of the knitted fabric was coated with a methylolated melamine resin, dried and cured. The engaging force of the surface fastener female materials produced in Examples 1 to 3 was 4.7, which was excellent in durability. In Comparative Example 1, the engaging force is 3.3.
It was inferior in durability.

[0033]

[Comparative Example 2] In Example 1, 105 dt at the front
ex / 12f nylon 6 fiber, back 30d / 12f
As a result of evaluation in the same manner as in Example 1 except that nylon 6 fiber was used, the engaging force was 2.7, which was inferior to Example 1 in durability.

[0034]

[Comparative Example 3] In Example 1, 105 dtex / 12f of one-component polytrimethylene terephthalate fiber having an intrinsic viscosity of 0.92 in the front and 0.9 in the back.
2 one-component polytrimethylene terephthalate fiber 33
As a result of evaluation in the same manner as in Example 1 except that dtex / 12f was dyed at 110 ° C. with a disperse dye, the engaging force was 3.5, which was inferior in durability to Example 1.

[0035]

[Table 1]

[0036]

By using the female surface fastener of the present invention, a surface fastener excellent in durability of engagement force can be obtained.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3B100 DA02 DA04 DB00                 4L002 AA07 AB02 AB05 AC00 AC01                       BA01 BB01 CA01 EA06 FA01                       FA06                 4L047 AA21 AB09 AB10 CB01 CB10

Claims (2)

[Claims] 1. A surface fastener female material comprising 10% by mass or more of latent crimp-expressing polyester fiber satisfying the following (a) to (c). (A) The initial tensile resistance is 10 to 30 cN / dtex, (b) the expansion and contraction elongation rate of the actual crimp is 10 to 100%, and
The elastic modulus of the actual crimp is 80 to 100%, and (c) the heat shrinkage stress at 100 ° C is 0.1 to 0.5c.
N / dtex. 2. A surface fastener using the female material of the surface fastener according to claim 1.