JPH09195154A - Nonwoven fabric for hook-and-loop fastener and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a nonwoven fabric for hook-and-loop fastener, capable of avoiding troublesome on producing process for individually preparing a ground weave and a fabric having piles and bonding these materials, providing a nonwoven fabric for hook-and-loop fastener by an industrially simple producing method, excellent in joining strength as the hook-and-loop fastener and capable of providing good fluff quality after repeated attachment and detachment. SOLUTION: A nonwoven web layer B3 as a base fabric is laminated on a nonwoven web layer A2 formed of a filament 1 to afford a laminated nonwoven web. A lattice-like ultrasonic fusing areas 4 having 5-20mm lattice-like intervals and 1-3mm width of fused parts are formed in the laminated nonwoven web to integrate laminated nonwoven webs and at least a part of the constituent filament 1 of the nonwoven web layer A2 is retained in a single yarn state so as to form a loop to provide the objective nonwoven fabric for hook-and-loop fastener.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonwoven fabric for hook-and-loop fasteners which can be detachably joined to a male member having a hook portion.

[0002]

2. Description of the Related Art Conventionally, as a fabric for hook-and-loop fasteners,
It is known that a ground structure formed of a natural fiber, a synthetic fiber or a yarn made of a mixture of these and a cloth having a pile formed of a synthetic fiber having a large fineness are bonded.

[0003]

DISCLOSURE OF THE INVENTION The present invention avoids the complexity of the manufacturing process such as the conventional fabric for hook-and-loop fasteners, in which a fabric having a ground structure and a fabric having piles are individually prepared and bonded to each other. However, a non-woven fabric for hook-and-loop fasteners can be obtained by an industrially simple method, has excellent bonding strength as a hook-and-loop fastener, and can have good fluff resistance even after repeated attachment and detachment. It is intended to provide.

[0004]

In order to solve this problem, the nonwoven fabric for hook-and-loop fasteners of the present invention comprises a nonwoven web layer A made of long fibers and a nonwoven web layer B used as a base cloth. This laminated non-woven web comprises a woven web and is integrated by a lattice-shaped ultrasonic fusion zone having a lattice spacing of 5 to 20 mm and a width of a fused portion of 1 to 3 mm. The gist is that at least a part of the constituent long fibers of the layer A holds the single yarn state to form a loop.

In the method for manufacturing a nonwoven fabric for hook and loop fasteners of the present invention, a non-woven web layer B formed of long fibers is laminated with a non-woven web layer B as a base fabric to obtain a laminated non-woven web. The laminated non-woven web is integrated by forming a lattice-like ultrasonic fusion zone having a lattice-like spacing of 5 to 20 mm and a width of the fusion-bonded portion of 1 to 3 mm on the web, and constituting the non-woven web layer A. The gist of the present invention is to hold at least a part of the above in a single yarn state to form a loop.

According to the present invention, as shown in FIG. 1, a non-woven web layer A2 made of long fibers 1 is used as a loop forming web layer, and a non-woven web layer B3 is laminated as a base fabric on the web layer.
Since this laminated nonwoven web is integrated by subjecting it to ultrasonic fusion treatment, the complexity of the manufacturing process of individually preparing a fabric having a ground structure and a pile and bonding them together is eliminated. The non-woven fabric for hook-and-loop fasteners can be obtained by an industrially simple method while avoiding it.

Moreover, the ultrasonic fusion-bonded area 4 formed in the present invention is formed in a lattice shape with an interval of 5 to 20 mm,
Since the width of the fused area is 1 to 3 mm, the nonwoven web layer A at least in the non-fused area in the lattice eyes is
The two constituent long fibers 1 can hold the single yarn state and form a loop without being fused to each other. Then, the hook portion of the male member of the hook-and-loop fastener is hooked on this loop, so that excellent joining strength as the hook-and-loop fastener can be exhibited.

In the present invention, the nonwoven web layer A is also used.
Before the non-woven web layer B is laminated on the non-woven web layer B, the non-woven web layer A is partially heat-pressed at a predetermined temperature in advance to laminate the non-woven web layer A and the non-woven web layer B. When performing the sonic fusion treatment, the non-woven web layer A can be satisfactorily maintained in its form, which is advantageous in operation, and a nonwoven fabric excellent in mechanical properties can be obtained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the nonwoven fabric for hook and loop fasteners of the present invention will be described in detail. Examples of the long fibers constituting the non-woven web layer A applied to the present invention include fiber-forming polyolefin-based polymers, polyester-based polymers, polyamide-based polymers and the like.

The polyolefin polymer is an aliphatic α-monoolefin having 2 to 18 carbon atoms, for example, ethylene, propylene, 1-butene, 1-pentene, 3-
Methyl-1-butene, 1-hexene, 1-octene, 1
Examples include homo-olefin polymers such as dodecene and 1-octadecene. The aliphatic α-monoolefins are other ethylenically unsaturated monomers such as butadiene, isoprene, 1,3-pentadiene, styrene, α
It may be a polyolefin-based copolymer in which a similar ethylenically unsaturated monomer such as methylstyrene is copolymerized. In the case of a polyethylene-based polymer, propylene, 1-butene, 1-octene or a similar higher α-olefin may be copolymerized with ethylene in an amount of 10% by weight or less, In the case of a polypropylene polymer, ethylene or a similar higher α-olefin may be copolymerized with propylene in an amount of 10% by weight or less. However, at this time, when the copolymerization rate of these copolymers exceeds the above range, the melting point of the copolymer is lowered, and when a nonwoven fabric made of these copolymers is used under high temperature conditions, It is not preferable because the characteristics and dimensional stability are reduced.

Examples of the polyester polymer include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and naphthalene-2,6-dicarboxylic acid, or aliphatic dicarboxylic acids such as adipic acid and sebacic acid or their esters. A homopolyester polymer or a copolymer thereof having a diol compound such as ethylene glycol, diethylene glycol, 1,4-butadiol, neopentyl glycol and cyclohexane-1,4-dimethanol as an alcohol component is used as a component. . Incidentally, paraoxybenzoic acid, 5-sodium sulfoisophthalic acid, polyalkylene glycol, pentaerythritol, bisphenol A and the like may be added or copolymerized to these polyester polymers.

Polyamide polymers include polyimino-1-oxotetramethylene (nylon 4), polytetramethylene adipamide (nylon 46), polycapramide (nylon 6), polyhexamethylene adipamide (nylon 66), Polyundecanamid (nylon 11),
Examples thereof include polylaurolactamide (nylon 12), polymethaxylene adipamide, polyparaxylylene decanamide, polybiscyclohexylmethane decanamide, or a polyamide-based copolymer having these monomers as constituent units. In particular, when polytetramethylene adipamide is applied, polytetramethylene obtained by copolymerizing other polyamide components such as polycapramide, polyhexamethylene adipamide, and polyundecamethylene terephthalamide in an amount of 30 mol% or less. It may be an adipamide-based copolymer. However, at this time, if the copolymerization rate of the other polyamide component exceeds 30 mol%, the melting point of the copolymer is lowered, and the mechanical properties of the nonwoven fabric made of these copolymers are high when used under high temperature conditions. And the dimensional stability is reduced, which is not preferable.

In the present invention, the above polymers may be used alone, or two or more different polymers selected from the above polymers may be mixed and used as a blend. When used as a blended body, it is advisable to appropriately set the conditions such as mixing type and mixing amount in consideration of spinnability and the like. Further, in the present invention, two or more kinds of different polymers or blends may be used, and the fiber cross-sectional shape of the long fibers may be a composite shape such as a core-sheath type or a parallel type.

In the present invention, the polymer constituting the non-woven web layer A may include, for example, a matting agent, a pigment, a flameproofing agent, a deodorant, a light stabilizer, a heat stabilizer, if necessary. Various additives such as antioxidants can be added within a range that does not impair the effects of the present invention.

In the present invention, the single fiber fineness of the long fibers constituting the non-woven web layer A is preferably 1.5 to 8.0 deniers, more preferably 2.0 to 5.0 deniers. good. When the monofilament fineness is less than 1.5 denier, the spinnability in the melt spinning process is reduced, and the mechanical properties of the resulting nonwoven fabric for hook and loop fasteners are reduced.
If the single fiber fineness exceeds 8.0 denier, the texture of the obtained nonwoven fabric for hook-and-loop fastener tends to be hard and tend to impair flexibility, both of which are not preferable.

In the present invention, the non-woven web layer B laminated on the non-woven web layer A forms a ground structure of hook and loop fasteners as a base cloth. The fibers constituting the non-woven web layer B are not particularly limited, and are composed of synthetic fiber short fibers or long fibers of the above-mentioned polymer suitable for constituting the non-woven web layer A, or natural fibers. Is mentioned. Among these, a web made of short fibers is particularly preferable, and the nonwoven web layer made of such short fibers is
For example, a thermal bonding nonwoven fabric formed by heat-sealing a carded short fiber web, a spunlace nonwoven fabric in which constituent fibers are three-dimensionally entangled with each other, etc. are applied, but are not limited to these. is not. Also,
As the carded short fiber web, a parallel card web in which the fibers are arranged in the traveling direction of the card machine, a crosslaid web in which the parallel cards are crosslaid, or a web after crosslaying is used depending on the arrangement degree of the fibers. Either a web in which longitudinal / horizontal fibers are arranged in a row is changed to a random card web that is randomly arranged, or a semi-random card web in which both of them are moderately arranged is selected.

The nonwoven fabric for hook-and-loop fasteners of the present invention is one in which a lattice-shaped ultrasonic fusion-bonded area is formed on a laminated nonwoven web and integrated. Since the ultrasonic fusion-bonded areas are formed in a lattice shape, at least the constituent long fibers of the nonwoven web layer A in the non-fusion-bonded areas in the meshes of the lattice are not fused to each other to form a single yarn state. It can be retained to form a loop.

In the present invention, the ultrasonic welding area is 5 to
It is important that the fused portions are formed in a grid shape with an interval of 20 mm and the width of the fused portion is 1 to 3 mm. If the distance between the fused areas is less than 5 mm, the distance between the fused areas is too small, and the number of fibers in the lattice is reduced, so that the bonding strength between the obtained nonwoven fabric and the male fastener is reduced, which is preferable. Absent. On the other hand, when the distance between the fused areas exceeds 20 mm, the long fibers constituting the non-woven web layer A are easily moved because the distance between the fused areas is wide, and thus the fluffing increases as the number of times of attachment / detachment with the male member of the surface fastener increases. Is likely to occur, which is not preferable.

Further, in the present invention, as will be described later, before laminating the nonwoven web layer B on the nonwoven web layer A,
From the viewpoint of the operability of the manufacturing process, it is preferable that the non-woven web layer A is subjected to partial heat-pressure welding in advance. However, the nonwoven fabric obtained in this case also has a non-woven web layer A.
It becomes possible for at least a part of the constituent long fibers of (1) to maintain a single yarn state to form a loop. Moreover, the nonwoven fabric obtained in this case is suitable as a hook-and-loop fastener having excellent mechanical properties.

Next, a method of manufacturing the surface fastener of the present invention will be described. First, a nonwoven web layer A made of long fibers is obtained by a conventional method such as a spunbond method. That is, using the above polymer as a suitable material, melt spinning it,
After cooling the spun polymer stream, it is pulled by using a take-up means such as air sucker, opened, and collected / deposited on the moving collecting surface, and the single fiber fineness is 1.5 to A nonwoven web layer A made of 8.0 denier long fibers is used.

When the pulling means is used to pull,
The take-up speed is preferably 3000 to 6000 m / min. When the take-up speed is less than 3000 m / min, the mechanical properties and dimensional stability of the obtained nonwoven web layer A are not improved because the degree of molecular orientation of the long fibers is not sufficiently increased.
If the take-up speed exceeds 6000 m / min, the spinnability at the time of melt spinning will be deteriorated, which is not preferable.

In the present invention, before the non-woven web layer B is laminated on the non-woven web layer A, the non-woven web layer A is previously prepared.
It is preferable to partially heat-bond the sheet. Thereby, when the non-woven web layer A and the non-woven web layer B are laminated and subjected to ultrasonic fusion treatment, the shape of the non-woven web layer A can be satisfactorily maintained, and the obtained non-woven fabric is obtained. It has excellent mechanical properties and has good fluff resistance even when it is repeatedly attached and detached as a surface fastener. Here, the partial heat pressure contact means that the engraved pattern is obtained by passing a web between a heated roll having an engraved pattern engraved on the surface, that is, an embossing roll and a heated metal roll having a smooth surface. The heat-bonding of the web-constituting fibers in the part corresponding to (3) is performed.

In the present invention, when the non-woven web layer A is subjected to partial heat-pressure contact, the temperature of the embossing roll and the smooth metal roll used is the lowest among the polymers constituting the non-woven web layer A. When the melting point of the polymer is Tm ° C, the temperature is preferably (Tm-30) ° C to (Tm-60) ° C. The temperature of both rolls at this time is (T
When the temperature exceeds m−30) ° C., the long-fiber non-woven fabric forming the obtained surface fastener is strongly heat-bonded, so that the long fiber non-woven fabric constituting the long-fiber non-woven fabric is entangled when the male members of the surface fastener are joined. Is not preferred, which is not preferable. That is, when the long-fiber non-woven fabric is heat-pressed at a low temperature, the single filaments of the long fibers are easily peeled off and entangled when the male members of the hook-and-loop fastener are joined. On the other hand, if the temperature of both rolls at this time is lower than (Tm-60) ° C, the heat-bonding of the long fiber non-woven fabric becomes weak, and it becomes difficult to maintain the form in the winding step that requires tension in the production of the non-woven fabric, which is not preferable. .

At this time, the shape of one of the partial heat-pressure-welded portions is not necessarily circular, but the area is preferably 0.1 to 1.0 mm ^2. Density, pressure contact density is 2 to 80 points / c
m ^2, preferably from 4 to 60 points / cm ^2, and the ratio i.e. the pressure area ratio 2-30% of the area of the total heat pressed region to the total surface area of the web, preferably be 4-20%.

When the pressure contact density is less than 2 points / cm ² ,
If the mechanical properties and shape retention of the nonwoven web layer A after hot pressing are not improved, while the pressure contact density exceeds 80 points / cm ² , the obtained nonwoven fabric for surface fasteners and the surface fastener male material are Both are not preferable because the bonding strength becomes weak. Further, if the pressure contact area ratio is less than 5%, the dimensional stability of the web after hot pressure contact is not improved, while if the pressure contact area ratio exceeds 30%, the obtained nonwoven fabric for surface fasteners and surface fastener male materials are obtained. Both of them are not preferable because the bonding strength with

The nonwoven web layer A used in the present invention preferably has a basis weight of 10 to 50 g / m ² . When the basis weight is less than 10 g / m ² , the mechanical properties of the obtained nonwoven fabric for hook-and-loop fastener are not improved, which is not preferable. On the other hand, when the basis weight exceeds 50 g / m ² , the thickness of the joint portion becomes large and the joint strength as the surface fastener becomes weak, which is not preferable.

Next, the nonwoven web layer B of the present invention is obtained. As the non-woven web layer B, the above-mentioned short fiber non-woven web obtained by a conventional method is preferably used. Specifically, for example, the carded short fiber web is subjected to a pressurized liquid flow treatment to form a three-dimensional entanglement between the constituent fibers of the short fiber non-woven web so that they are closely integrated. And a thermal bonding method in which a short fiber web that has been carded is subjected to heat fusion by thermal through, calendering, partial thermal pressure welding, etc. to make it non-woven.

The nonwoven web layer B used in the present invention has
20 to 100 g / m^Two Is preferred. 20
g / m^Two The shape of the non-woven web layer B itself obtained below
State retention is not improved and it does not function as a base fabric, so it is preferable.
No On the other hand, 100 g / m ^Two If you exceed the
And the bonding strength will decrease.
Less preferred.

Next, the non-woven web layer A and the non-woven web layer B obtained as described above are laminated to form a laminated non-woven web,
The laminated nonwoven web is subjected to ultrasonic fusion treatment, and as described above, the laminated nonwoven web is separated by 1 to 3 m at intervals of 5 to 20 mm.
An ultrasonic fusion-bonded area having a width of m is formed to integrate the laminated nonwoven webs, thereby holding at least a part of the constituent long fibers of the nonwoven web layer A in a single yarn state to form a loop. Then, a nonwoven fabric for hook-and-loop fasteners can be obtained.

In the present invention, the ultrasonic fusion treatment is carried out, for example, by the following method. That is, in the ultrasonic fusion processing of the present invention, for example, a frequency of 19.7k
It is equipped with an ultrasonic wave oscillating device (horn) of Hz and a vibrating plate for receiving ultrasonic waves, and is further formed into a blade-shaped portion for melting the laminated nonwoven web and the portion to which the laminated nonwoven web is fused The ultrasonic fusing device is provided with either a roll having a fused portion or a roll having only a fused portion.

Here, the shape of the fusing and fusing roll used will be described. The blade-shaped portion for fusing the laminated nonwoven web is formed by a double-edged blade having a cone shape in the circumferential direction of the roll in the range of 30 to 120 degrees, or the angle is 30 degrees. It has a structure formed in a single-edged shape in the range of 60 degrees. If the angle of the blade for performing the fusing is 30 degrees or less, the blade forming the fusing portion is likely to be damaged, which is not preferable. Further, when the angle is more than 120 degrees in the double-edged shape, and when the angle is more than 60 degrees in the blade-shaped shape, the laminated nonwoven web is not fused and unbonded, which is not preferable.

The portion to be fused, which is provided with convex portions in the shape of dots or bands on the circumference of the roll, may be in one row, a plurality of rows, or a staggered arrangement. Further, the spot-shaped or band-shaped portions to be welded may be arranged not only on one side of the blade for fusing but also on both sides. That is, by using a roll having fused portions on both sides of a blade for fusing, it is possible to form sewn portions by fusing on both sides of the fused portion. For pressurizing the roll when fusing and fusing,
Air pressure is used, and the pressure at which the roll contacts the vibration plate is preferably in the range of 0.5 to 10 kg / cm. When the pressure is less than 0.5 kg / cm, the pressing pressure becomes insufficient with respect to the thickness of the laminated nonwoven web, and neither melting nor fusion occurs, which is not preferable. On the other hand, the pressure is 10 kg /
If it exceeds cm, too much pressure is applied to the fused portion,
It is not preferable because the film strength of the fusion-bonded portion causes a decrease in the bonding strength.

Further, it is preferable to provide a height difference between the heights of the blades forming the fusing part of the roll and the heights of the dot-shaped or band-shaped convex portions to be fused. The range of height difference is
It is advisable to lower the height of the convex portion of the fusion-bonded portion in the range of 10 μm to 100 μm with respect to the height of the blade forming the fusing portion.

The nonwoven fabric of the present invention may be subjected to dyeing, printing and the like, if necessary.

[0035]

Next, the present invention will be specifically described based on examples, but the present invention is not limited to these examples. The measurement of various characteristic values in the following examples was performed by the following method.

(1) Melting point (° C.): Using a differential scanning calorimeter DSC-2 type manufactured by Perkin Elma, Inc., heating rate 20 ° C. /
The melting point (° C) was defined as the temperature at which the melting endothermic curve gives an extreme value.

(2) Melt flow rate value (g / 10
Min): Measured according to the method described in ASTM-D-1238 (L).

(3) Unit weight of non-woven fabric (g / m ² ): 10 cm in length × 10 cm in width from standard sample
After making points and reaching the equilibrium water content, the weight (g) of each sample piece was weighed, and the average value of the obtained values was used as the unit area (m
² ) It was converted into per unit and made into a basis weight (g / m ² ).

(4) Tensile strength of non-woven fabric (kg / 5 cm
Width) and tensile elongation (%): measured according to the method described in JIS-L-1096A. That is, the sample length is 15c
m, the sample width of 5 cm, the machine direction (M
10 in each of D) and the direction (CD) orthogonal thereto.
Created point by point, using a constant speed extension type tensile tester (Tensilon UTM-4-1-100, manufactured by Toyo Baldwin Co., Ltd.) for the MD direction and the CD direction of the non-woven fabric for each sample piece, and the gripping interval of the sample is 10 cm. And pulling speed 10 cm /
Elongated in minutes. Then, the obtained load value during cutting (kg /
The average value of 5 cm width) was taken as tensile strength (kg / 5 cm width), and the average value of elongation at break (%) was taken as tensile elongation (%).

(5) Bonding strength: The obtained non-woven fabric is a ready-to-use male surface fastener material (1QEFN-N manufactured by YKK Co., Ltd.)
No. 25), and the strength required for peeling them from each other was evaluated by a sensory test in five levels. Here, the larger the number, the greater the bonding strength.

(6) Fluffing resistance: The operation of joining the obtained nonwoven fabric to a ready-to-use surface fastener male material or peeling it off was repeated 20 times, and the state of fluffing was visually observed and evaluated in 5 levels. did. Here, it is shown that the larger the number, the better the fluff resistance.

Example 1 First, as the nonwoven web layer A, a spunbonded nonwoven fabric made of synthetic long fibers was obtained. That is, a polypropylene polymer chip having a melting point of 156 ° C., a density of 0.96 g / cc and a melt flow rate value of 56 g / 10 was used, and this was melted at a spinning temperature of 250 ° C., melt-spun from a spinning hole, and spun. After cooling the polymer stream, it was drawn at a take-off speed of 4000 m / min using an air sucker, and then the fiber bundle was opened by corona discharge and collected / deposited on the moving collecting surface to obtain a single fiber. A non-woven web composed of long fibers having a fineness of 3 denier was obtained. Then, the obtained nonwoven web was subjected to a partial heat-pressing treatment to obtain a nonwoven web layer A having a basis weight of 25 g / m ² . When performing the heat pressure welding, the roll surface temperature is 115 ° C. by an embossing roll arranged with a pressure contact area ratio of 13.2% and a pressure contact density of 20 points / cm ² and a metal roll having a smooth surface.
The linear pressure between the rolls was 25 kg / cm.

Next, as a nonwoven web layer B, a spunlaced nonwoven fabric made of natural fibers was obtained. That is, using a bleached cotton having an average fineness of 1.5 denier and an average fiber length of 25 mm, a short fiber web having a basis weight of 35 g / m ^{2 with} a nonuniform fiber arrangement was obtained by a random card machine. This short fiber non-woven web was placed on a 70 mesh net moving at 20 m / min, and 50
From the position of mm, the injection hole diameter is 0.1 mm, the injection hole diameter interval is 0.6 mm, and the injection holes are arranged in a row, and the first preliminary entanglement is performed, and the entanglement treatment is performed with normal temperature water having a water pressure of 30 kg / cm ² . Subsequently, the second entanglement treatment was performed using the same net and injection hole as described above, with a water pressure of 70 kg / cm.
The water pressure of ² applied the confounding treatment 4 times. In addition, the third
As the entanglement treatment for the second time, the same net and injection holes as described above were used, the short fiber non-woven web subjected to the entanglement treatment was reversed, and the entanglement treatment was applied 5 times under the same hydraulic conditions as the second time, and A short fiber non-woven web, which was closely entangled with each other, was obtained. Subsequently, the obtained short fiber non-woven web was dried with a drier at a temperature of 100 ° C. after removing excess water with a mangle to make a dense three-dimensional entanglement on both front and back sides with a basis weight of 33 g / m ^2. A nonwoven web layer B having

Next, the non-woven web layer A and the non-woven web layer B obtained by the above method were laminated to form a laminated non-woven web and subjected to ultrasonic fusion treatment. That is, this laminated nonwoven web was passed between a horn and a pattern roll having a protrusion having a width of 2 mm and a length of 2 mm at a linear pressure of 1.5 kg / cm and a processing speed of 3.0 m / min. The ultrasonic fusion was performed at intervals of 15 mm along the machine direction and at intervals of 10 mm along the direction orthogonal to the machine direction. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 55.2 g / m ² Strength (MD): 6.2 kg / 5 cm width Elongation (MD): 36.5% Strength (CD): 3.8 kg / 5 cm width Elongation (CD): 51 3% Bonding strength: 4 Fluff resistance: 4 The non-woven fabric for hook-and-loop fastener obtained has mechanical properties that can withstand practical use and excellent joining strength as a female member of hook-and-loop fastener, and almost no fluffing occurs even after repeated attachment and detachment. It did not happen.

(Example 2) The temperature of the embossing roll and the metal roll having a smooth surface when forming the nonwoven web layer A was set to 1
A nonwoven fabric for hook-and-loop fasteners was obtained under the same conditions as in Example 1 except that the temperature was 25 ° C. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 56.6 g / m ² Strength (MD): 7.8 g / 5 cm width Elongation (MD): 45.6% Strength (CD): 4.6 g / 5 cm width Elongation (CD) : 62.7% Bonding strength: 4 Fluffing resistance: 5 The non-woven fabric for hook-and-loop fastener obtained has mechanical properties for practical use and excellent joining strength as a female member of hook-and-loop fastener. It did not cause fuzz at all.

Example 3 The temperature of the embossing roll and the metal roll having a smooth surface when forming the nonwoven web layer A was set to 1
A nonwoven fabric for hook-and-loop fastener was obtained under the same conditions as in Example 1 except that the temperature was set to 00 ° C. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 53.2 g / m ² Tensile strength (MD): 5.8 g / 5 cm width Elongation (MD): 32.1% Tensile strength (CD): 3.4 g / 5 cm width Elongation (CD) : 48.9% Bonding strength: 5 Fluffing resistance: 4 The non-woven fabric for hook-and-loop fastener obtained has mechanical properties that can withstand practical use, and particularly excellent joining strength as a female member of hook-and-loop fastener, and even after repeated attachment and detachment. Almost no fuzz was generated.

Example 4 When ultrasonically fusing a laminated nonwoven web, fusing zones were formed at intervals of 10 mm along the machine direction and at intervals of 5 mm along the direction orthogonal to the machine direction. A non-woven fabric for hook-and-loop fastener was obtained under the same conditions as in Example 1 except for the above. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 55.4 g / m ² Strength (MD): 6.5 g / 5 cm width Elongation (MD): 30.6% Strength (CD): 3.9 g / 5 cm width Elongation (CD) : 46.7% Bonding strength: 4 Fluffing resistance: 5 The non-woven fabric for hook-and-loop fastener obtained has mechanical properties that can withstand practical use and excellent joining strength as a female member of hook-and-loop fastener, especially after repeated attachment and detachment. It did not cause fuzz at all.

(Embodiment 5) When ultrasonically fusing a laminated nonwoven web, fusing zones were formed at intervals of 20 mm along the machine direction and at intervals of 15 mm along the direction orthogonal to the machine direction. A non-woven fabric for hook-and-loop fastener was obtained under the same conditions as in Example 1 except for the above. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 53.4 g / m ² Strength (MD): 5.6 g / 5 cm width Elongation (MD): 41.2% Strength (CD): 3.5 g / 5 cm width Elongation (CD) : 56.8% Bonding strength: 4 Fluffing resistance: 3 The non-woven fabric for hook-and-loop fastener obtained has mechanical properties that can withstand practical use and excellent bonding strength as a female member of hook-and-loop fastener, and fuzzing even after repeated attachment and detachment. Was not generated.

(Comparative Example 1) The temperature of the embossing roll and the metal roll having a smooth surface when forming the non-woven web layer A was set to 8
Except that the fusion zone was formed at 0 ° C. and at the time of ultrasonically fusing the laminated nonwoven web at 5 mm intervals along the machine direction and 3 mm intervals along the direction orthogonal to the machine direction. A nonwoven fabric for hook-and-loop fastener was obtained under the same conditions as in Example 1. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 56.1 g / m ² Strength (MD): 4.8 g / 5 cm width Elongation (MD): 30.5% Strength (CD): 3.0 g / 5 cm width Elongation (CD) : 42.8% Bonding strength: 2 Fuzzing resistance: 2 The obtained nonwoven fabric for hook-and-loop fasteners has a lower roll temperature at the time of partial hot pressing than that of Example 1, and therefore has slightly poor mechanical properties, Since the lattice spacing of the sonic fusion zone is too small,
It was inferior in practical use as a hook-and-loop fastener, because it was poor in joining strength as a hook-and-loop fastener female member, and easily fluffed after repeated attachment and detachment.

(Comparative Example 2) The temperature of the embossing roll and the metal roll having a smooth surface at the time of forming the non-woven web layer A were set to 8
Except for forming a fusion zone at 0 ° C. and ultrasonically welding the laminated nonwoven web at 30 mm intervals along the machine direction and 20 mm intervals along the direction orthogonal to the machine direction. A nonwoven fabric for hook-and-loop fastener was obtained under the same conditions as in Example 1. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 51.2 g / m ² Strength (MD): 5.0 g / 5 cm width Elongation (MD): 30.5% Strength (CD): 3.0 g / 5 cm width Elongation (CD) : 42.8% Bonding strength: 3 Fluff resistance: 1 The obtained nonwoven fabric for hook-and-loop fasteners has a lower roll temperature during partial hot press bonding than in Example 1, and therefore has a slightly poorer mechanical property, and in particular, an ultra-high strength. Because the lattice spacing in the sonic fusion zone is too wide,
After repeated attachment and detachment, fluffing occurred, which was not practical for a surface fastener.

(Comparative Example 3) The temperature of the embossing roll and the metal roll having a smooth surface when forming the nonwoven web layer A was set to 1
Except that the fusion zone is formed at 30 ° C. and when ultrasonically fusing the laminated nonwoven web, the fusing area is formed at 5 mm intervals along the machine direction and 3 mm intervals along the direction orthogonal to the machine direction. A nonwoven fabric for hook-and-loop fastener was obtained under the same conditions as in Example 1. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 54.2 g / m ² Tensile strength (MD): 8.5 g / 5 cm width Elongation (MD): 51.2% Tensile strength (CD): 5.6 g / 5 cm width Elongation (CD) : 63.6% Bonding strength: 1 Fluffing resistance: 3 The obtained nonwoven fabric for hook and loop fasteners has a higher roll temperature than that in Example 1 during partial hot pressure welding, so that it has excellent mechanical properties, but ultrasonic waves Since the lattice spacing in the fusion zone is too small,
The surface fastener was inferior in joint strength as a female material and could not be put into practical use as a surface fastener.

(Comparative Example 4) The temperature of the embossing roll and the metal roll having a smooth surface when forming the nonwoven web layer A was set to 1
With the exception of forming the fusion zone at 30 ° C. and ultrasonically welding the laminated nonwoven web at 30 mm intervals along the machine direction and 20 mm intervals along the direction orthogonal to the machine direction. A nonwoven fabric for hook-and-loop fastener was obtained under the same conditions as in Example 1. The nonwoven fabric performance of the obtained nonwoven fabric for hook and loop fasteners is shown below.

Unit weight: 52.9 g / m ² Strength (MD): 8.9 g / 5 cm width Elongation (MD): 52.6% Strength (CD): 5.9 g / 5 cm width Elongation (CD) : 64.9% Bonding strength: 2 Fluffing resistance: 2 The obtained nonwoven fabric for hook-and-loop fastener has a higher roll temperature than that in Example 1 during partial hot press contact, so that it has excellent mechanical properties. Since the lattice spacing in the fusion zone is too wide,
After repeated attachment and detachment, fuzz was liable to occur, and it was not practical for a fastener.

[0062]

According to the present invention, the non-woven web layer A made of long fibers is used as a loop forming web layer, and the non-woven web layer B is laminated as a base fabric on the web layer. Since it is integrated by subjecting it to sonic fusion processing, it is possible to avoid the complexity of the manufacturing process of individually creating a fabric having a ground structure and a pile and bonding them as in the past, and it is industrially simple. The nonwoven fabric for hook-and-loop fasteners can be obtained by various methods.

In addition, the ultrasonic fusion-bonded areas formed in the present invention are formed in a grid shape with an interval of 5 to 20 mm, and the width of the fusion-bonded areas is 1 to 3 mm, so that at least in the eyes of the grid. The constituent long fibers of the non-woven web layer A in a certain non-fused area can hold the single yarn state and form a loop without being fused to each other. Then, the hook portion of the male member of the hook-and-loop fastener is hooked on this loop, so that excellent joining strength as the hook-and-loop fastener can be exhibited.

In the present invention, the nonwoven web layer A is also used.
Before the non-woven web layer B is laminated on the non-woven web layer B, the non-woven web layer A is partially heat-pressed at a predetermined temperature in advance to laminate the non-woven web layer A and the non-woven web layer B. When performing the sonic fusion treatment, the non-woven web layer A can be satisfactorily maintained in its form, which is advantageous in operation, and a nonwoven fabric excellent in mechanical properties can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a nonwoven fabric for hook and loop fasteners of the present invention.

[Explanation of symbols]

 1 Long Fiber 2 Nonwoven Web Layer A 3 Nonwoven Web Layer B 4 Ultrasonic Fusing Area

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Michiyo Iimi 23 Uji Kozakura, Uji City, Kyoto Prefecture Unitika's Central Research Laboratory

Claims (4)

[Claims] 1. A laminated non-woven web comprising a non-woven web layer A made of long fibers and a non-woven web layer B serving as a base layer laminated on the non-woven web layer A. The laminated non-woven web has a lattice-like spacing of 5 to 20.
mm, and the width of the fused portion is integrated by a lattice-shaped ultrasonic fusion zone having a width of 1 to 3 mm, and at least a part of the constituent long fibers of the non-woven web layer A holds the single yarn state to form a loop. Nonwoven fabric for hook-and-loop fasteners, characterized by being formed. 2. An embossing roll having a temperature of (Tm-30) ° C. to (Tm-60) ° C., where Tm ° C. is the melting point of the polymer having the lowest melting point among the polymers constituting the nonwoven web layer A. 2. The nonwoven fabric for hook-and-loop fastener according to claim 1, wherein the nonwoven web layer A is partially heat-pressed by the above method. 3. A laminated non-woven web comprising a non-woven web layer A formed of long fibers and a non-woven web layer B laminated as a base fabric on the laminated non-woven web.
m, the width of the fused portion is 1 to 3 mm to form a lattice-shaped ultrasonic fused area to integrate the laminated non-woven web, and at least a part of the constituent long fibers of the non-woven web layer A is in a single yarn state. A method for manufacturing a nonwoven fabric for hook-and-loop fasteners, characterized in that the loop is formed by holding it. 4. When the melting point of the polymer having the lowest melting point among the polymers constituting the nonwoven web layer A is previously set to Tm ° C. before the nonwoven web layer B is laminated on the nonwoven web layer A. The method for producing a nonwoven fabric for hook-and-loop fastener according to claim 3, wherein the non-woven web layer A is subjected to partial heat pressure contact at a temperature of (Tm-30) ° C to (Tm-60) ° C.