JPH0633359A - Female member of hook-and-loop fastener - Google Patents

Abstract

PURPOSE:To provide a low-price female member of a hook-and-loop fastener excellent in engagement properties. CONSTITUTION:From a composite fiber composed of a copolyester as the sheath component and a high-melting polyester as the core component, card webs exhibiting 60% dry heat shrinkage factor at 140 deg.C are made. Spunbonded nonwoven fabric made of polypropylene is laminated to the resultant webs and needle punching treatment is applied thereto. Heat treatment is subsequently applied thereto, thus producing the objective female member of a hook-and-loop fastener, containing wrinkles of 0.2 to 3mm depth in an amount of 2 to 40 per 1cm on the spunbonded nonwoven fabric surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female material for a surface fastener.

[0002]

2. Description of the Related Art Conventionally, hook-and-loop fasteners have been used in various fields such as clothing, daily necessities, interior materials, and industrial materials because of their ease of use. Depending on the application, hooks (male materials) are the basic structural elements of fasteners. ) And various shapes of loops (female material) have been made. However, most of them are rather improved techniques viewed from the hook side, and the current situation is that researches from female materials such as loops have not been sufficiently conducted. Hitherto, as a female material for a hook-and-loop fastener, for example, one having a woven or knitted loop or fluff, one made of a non-woven fabric structure, one using a loop of a Taslan textured yarn, and the like have been proposed. The ones with woven and knitted loops are the most popular, but there is a cost problem in the disposable field,
In the case of the non-woven fabric type, since short fibers have been conventionally used, the short fibers are detached by repeated attachment / detachment with the hook, which is not satisfactory in terms of engagement durability and appearance. Further, there is a complexity that the one using the Taslan textured yarn cannot be used as it is, and in fact, it cannot be used unless the textured yarns are aligned and integrated with the base material.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of conventional female female surface fasteners, and to provide female female surface fasteners that are inexpensive and have excellent engaging characteristics. It is a thing.

[0004]

That is, the present invention is a female surface fastener material comprising a long-fiber nonwoven fabric having 2 to 40 wrinkles having a depth of 0.2 to 3 mm per cm, and
It is a female member for a surface fastener in which a long fiber nonwoven fabric having wrinkles is laminated and integrated on a sheet-shaped material. In the present invention, it is important to use a long-fiber nonwoven fabric in which wrinkles are formed on the surface that engages with the hooks, and the wrinkles are formed along one direction of the female material surface. Alternatively, it may be formed without any directivity. The wrinkle form is not particularly limited as long as it does not impair the effects of the present invention, and may be an irregular form or a regular form. The wrinkle depth can be changed depending on the size and shape of the hook, but it is still 0.2-3 m.
It should be m, preferably 0.3-2 mm. If the depth is less than 0.2 mm, engagement with hooks does not occur sufficiently, so it is not practical, and if it exceeds 3 mm, it is technically difficult to increase the number of wrinkles per cm, and as a result, engagement with hooks occurs. Not only becomes insufficient, but also becomes unfavorable in appearance. The number of wrinkles can be changed in relation to the density of hooks, but it is 2 to 40 per 1 cm, preferably 5 to 5.
It is necessary to have 20 pieces. If it is less than 2 per 1 cm, the surface irregularities of the female material will not be sufficiently formed, resulting in poor engagement with the hook, and if it exceeds 40, it will be difficult to set the wrinkle depth within the above range, and unevenness will occur. The effect of does not appear sufficiently. Further, the female material of the present invention is required to have a surface composed of a long fiber non-woven fabric, and since the constituent fibers of the female material do not fall off even when the hook is repeatedly attached and detached, it is excellent without impairing its appearance. The feature is that the engaging force can be maintained for a long time.

The long-fiber nonwoven fabric is not particularly limited, but one having a basis weight of 10 to 200 g / m ↑ 2 is preferably used from the viewpoint of engaging force with the hook. In addition, the material is not particularly limited, but when a nonwoven fabric has a large heat shrinkage ratio, it becomes difficult to make a difference in shrinkage ratio with a highly shrinkable sheet-like material as described later, and thus wrinkles are formed by lamination and heat treatment. In this case, it is desirable to use a low-shrink long-fiber nonwoven fabric, and for example, a combination in which the difference in dry heat shrinkage between the sheet material and the long-fiber nonwoven fabric at 140 ° C. is 10 to 60% is desirable. The single fiber fineness of the fibers constituting the long-fiber nonwoven fabric is preferably about 1 to 5 denier. If it is too thin, the fibers are likely to be cut by the hook during repeated engagement, while if it is too thick, the rigidity of the fibers increases and wrinkles are less likely to occur during wrinkle formation, which is not preferable. As the material constituting the long fiber non-woven fabric, for example, polyolefin such as polypropylene and polyethylene, thermoplastic polymer such as polyester and polyamide can be used. In the present invention, polyolefin such as polypropylene is preferably used, and is a representative. Specifically, polypropylene spunbonded non-woven fabric can be preferably used.

Various methods for forming wrinkles are conceivable. A female material composed of a long fiber non-woven fabric alone is formed by pressing a raw non-woven fabric through a heating roll having a wrinkle of a desired shape on its surface. Obtainable. However, from the aspect of wrinkle shape retention and engagement characteristics, high shrinkability sheet-like material and long-fiber nonwoven fabric are laminated and integrated and then heat-treated at high temperature, and the shrinkage force of the sheet-like material is used to form long-fiber nonwoven fabric. It is preferable to form wrinkles. In addition, the control of the wrinkle form is possible by changing the pattern design of the wrinkles on the roll as described above, and in the case of lamination and heat treatment, for example, if a card web is used as a sheet material, a female material is formed. It is possible to form wrinkles along one direction, and it is possible to form wrinkles having a complicated shape by using a random web. Since the formation of wrinkles has a great influence on the engagement performance, it must be formed carefully, but in order to form the desired wrinkles, the ratio (B / A) of the basis weight of the long fiber nonwoven fabric B and the sheet-like material A (B / A) is required. 5-
0.1 is preferable, and each basis weight is also preferably about 10 to 200 g / m ↑ 2.

Next, the sheet-like material laminated with the long-fiber non-woven fabric will be described. The sheet-like material is a sheet-like fiber structure such as a woven fabric, a knitted fabric, a non-woven fabric or the like or a highly-shrinkable film made of highly shrinkable raw cotton. The long-fiber nonwoven fabric is laminated and integrated with the long-fiber nonwoven fabric and heat-treated to form wrinkles in the long-fiber nonwoven fabric by utilizing heat shrinkage of the sheet-shaped product. However, when a film-like material is used, it is preferable to use a sheet-like fiber structure because the female material is likely to become hard.

The sheet material made of highly shrinkable fibers preferably has a dry heat shrinkage at 140 ° C. of 15 to 70%. Examples of highly shrinkable fibers include isophthalic acid and 5-metal sulphate. A modified polyester fiber, an acrylic fiber, a polyamide fiber or the like obtained by copolymerizing a third component such as phoisophthalic acid by several mol% to several tens mol% can be used, but a copolymerized polyester fiber is preferably used. These fibers may be individual fibers or various conjugate fibers, but in the present invention, when a conjugate fiber composed of a copolymer polyester and a high melting point polyester is used, it is possible to impart high shrinkability and heat fusion property at the same time. As a result, during the heat treatment for laminating and integrating with the long-fiber nonwoven fabric, fusion between the fibers occurs, the integration of the two is further promoted, and the morphology of the female material is stabilized, which is preferable.

The method for laminating the long-fiber non-woven fabric and the sheet-like material is not particularly limited, but they may be integrated by, for example, needle punching or water needleing after laminating. The needle punch conditions are preferably, for example, about 50 to 200 penes, and the water needle conditions are, for example, a nozzle diameter of about 0.3 to 1 mm and a water pressure of 30 to 60 kg / cm ↑ 2.
It is desirable that it is a degree.

The surface fastener female material of the present invention thus obtained has a specific wrinkle, whereby hooks of various conventional woven and molded surface fasteners such as those made by Kuraray (velcro tape, magilock, Multilock), Yoshida Kogyo (Quickron, Mold Quickron), Kanebo (Beltouch), Ikoma (Unitape), Three M
It is possible to engage with manufactured products (dual lock), but in particular, the engagement with the protruding element of the molded surface fastener is extremely good. For example, the element pitch is 3 mm or less, the hood is 2 mm or less, and the element thickness is 1.5mm or less, element area 3mm ↑ 2 or less, element height 2mm or less, element density 20 / cm ↑ 2
The maximum effect can be exhibited in the engagement with the above-mentioned relatively small male material.

The female material of the surface fastener of the present invention is
It is cheaper than conventional female materials and has excellent engaging characteristics, and since there is virtually no loss of constituent fibers due to repeated attachment / detachment, it can be applied to all conventionally known surface fastener applications.
It is particularly suitable for disposable products, for example, hygiene materials such as underwear, diapers and sanitary products.

[0012]

EXAMPLES The present invention will now be described in detail with reference to examples, but the present invention is not limited thereto. The dry heat shrinkage, shear strength and peel strength in the examples were determined by the following methods. In addition, the number of wrinkles is 1 for female materials.
The value obtained by measuring the number of wrinkle peaks or troughs in cm was averaged, and the wrinkle depth was expressed as the average value of the measured values of the heads of wrinkle peaks and valleys. <Dry heat shrinkage> A sample piece (25 cm x 25 cm) is placed on a nylon cloth, and a square of 20 cm on a side is drawn in a state of being substantially along the lengthwise and lateral directions of the sample piece, and the sample piece is placed in a hot air circulation dryer. Heat treatment (140 ° C x 10 seconds) at
Then, cool for 1 minute. Then, the distance between the opposite sides of the square drawn on the sample piece is measured at three points in each of the vertical and horizontal directions. Then, the area S of the square after heat shrinkage was calculated from the average value of three data in the vertical direction and the average value of three data in the horizontal direction, and the dry heat shrinkage rate (%) was obtained according to the following formula. Dry heat shrinkage rate (%) = [(400−S) / 400] × 10
0 <Shear strength> Make a sample piece about 100 mm long, lightly join it with Kuraray's Magilock so that it overlaps with 50 mm, and attach it to a 2 kg iron roller (70 mm diameter x 6 mm).
5 mm), and then subjected to one reciprocal rolling, a tensile strength test was conducted using an autograph (AGS-100A) manufactured by Shimadzu at a tensile speed of 300 mm / min. cm ↑ 2). In addition, the tenacity was measured for the first time and after the repeated attachment and detachment five times. <Peel strength> Make a sample piece about 130mm long and lightly join it by overlapping it with Kuraray's Magilock.
After rolling back and forth once with a kg iron roller (70 mm diameter x 65 mm), this was autographed by Shimadzu (AGS-100).
Using A), pulling speed 300 mm / min, chart speed 40
The tape was peeled off for 30 to 50 mm at mm / min, 6 maximum points and 6 minimum points were read from the graph, and the average value was taken as the peel strength (g / cm). In addition, the tenacity was measured for the first time and after the repeated attachment and detachment five times.

Example 1 As a sheet-like fiber structure A, a heat fusion composite fiber (polyethylene terephthalate as a core component and isophthalic acid at 45%) was used.
A core-sheath type composite fiber containing a mol% modified polyethylene terephthalate as a sheath component, 2 denier x 51 mm) is used in accordance with a conventional method, and a dry heat shrinkage rate at 140 ° C is 60% at a weight per unit area of 50 g / m ↑ 2 and a parallel rate of 60%. A card web is made, and a polypropylene spun bond having a basis weight of 30 g / m ↑ 2 and a dry heat shrinkage rate of 6% at 140 ° C. is placed as a long-fiber non-woven fabric B on the card web, and needle punching is carried out from the upper side for 100 penes. , B were laminated and integrated. Next, when the laminated and integrated product was heat-treated at 140 ° C for 10 seconds by a hot-air circulation type dryer, 7 cm / cm was obtained on the surface of the long-fiber nonwoven fabric.
Irregular wrinkles with an average depth of 1 mm could be formed. When this was engaged with the protruding element of Kuraray's Magilock, it was confirmed that the engaging strength was extremely good and that the fibers constituting the female material did not fall off even after repeated attachment and detachment. Table 1 shows the wrinkle state of the obtained female material, the shear strength as a surface fastener, the peel strength, and the presence / absence of fibers falling off.

[0014]

[Table 1]

Example 2 As the sheet-like fiber structure A, highly shrinkable ester fiber (polyethylene terephthalate fiber copolymerized with 12 mol% of isophthalic acid, 1.5 denier x 51 mm) was used according to a conventional method to obtain a basis weight of 35 g / m 2. In ↑ 2, a parallel card web having a dry heat shrinkage of 37% at 140 ° C. was prepared, and the same polypropylene spunbond as the long fiber non-woven fabric B used in Example 1 was placed on the parallel card web, and the needle punch was pressed from the upper side to 100.
By penetrating, A and B were laminated and integrated. Next, the laminated and integrated product is heated to 140 by a hot air circulation type dryer.
When heat-treated at 10 ° C. for 10 seconds, irregular wrinkles with an average depth of 0.3 mm, 3 per cm, could be formed on the surface of the long-fiber nonwoven fabric. When this was engaged with a projecting element of Magilock, it was confirmed that the engaging strength was extremely good and that the fibers constituting the female material did not fall off even after repeated attachment and detachment. The performance of the obtained female material is shown in Table 1.

Example 3 A polypropylene spun bond having a basis weight of 50 g / m ↑ 2 obtained by a conventional method was used with a groove pitch of 10 pieces / cm and a groove depth of 2 mm.
Linear pressure of 30kg / c on embossing roll with surface temperature of 160 ℃
As a result, a female material having regular wrinkles was formed. This female material also showed excellent engaging strength as in the case of the above-mentioned examples, and no detachment of constituent fibers was observed even after repeated attachment and detachment. The properties and performance of the obtained female material are shown in Table 1.

Comparative Example 1 The spunbond used in Example 3 was used as it was as a female material without passing through an embossing roll. This spunbond has minute irregularities (depth of 0.1
mm, 3 to 4 pieces / cm), but as shown in Table 1, the engagement with Magilock was poor and impractical.

Comparative Example 2 A core-sheath type heat-fusible composite fiber (2 denier x 51 mm) having a dry heat shrinkage at 140 ° C of 10% and polyethylene terephthalate as a core component and polyethylene as a sheath component was used. A card web having a basis weight of 33 g / m ↑ 2 was prepared according to a conventional method and heat treated at 140 ° C. for 10 seconds to obtain a female material. This female material had good engagement with Magilock, but fluffing and falling off of the constituent fibers were remarkably impractical due to repeated attachment and detachment.

Comparative Example 3 As the sheet-like fiber structure A, heat fusion-bonded composite fibers (core-sheath composite fibers containing polyethylene terephthalate as a core component and polyethylene as a sheath component, 2 denier × 51 mm) were used according to a conventional method. A parallel card web having a basis weight of 53 g / m 2 and a dry heat shrinkage at 140 ° C of 10% at 140 ° C was prepared, and the same polypropylene spunbond as the long fiber nonwoven fabric B used in Example 1 was placed on the parallel card web and needle punched. By performing 100 penetrating from the upper side, A and B were laminated and integrated.
Next, the laminated and integrated product was heat-treated at 140 ° C. for 10 seconds by a hot air circulation type dryer, but wrinkles could not be formed on the surface of the long fiber nonwoven fabric. When this was engaged with the projecting element of Magilock, the engaging strength was extremely weak and it was completely impractical.

Claims (3)

[Claims] 1. A female member for a surface fastener comprising a long-fiber nonwoven fabric having 2 to 40 wrinkles having a depth of 0.2 to 3 mm per cm. 2. A female member for a surface fastener, wherein a long fiber nonwoven fabric B having wrinkles is laminated and integrated on one surface of a sheet-like material A. 3. The surface fastener according to claim 2, wherein the sheet-like material is a sheet-like fiber structure, and the basis weight ratio B / A of each of the structure A and the long-fiber nonwoven fabric B is 5 to 0.1. Female material.