JPH0919309A - Hook-and-loop fastener and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hook-and-loop fastener which is usable for molding of a male type as well having looped projecting parts in a raised state and has projections and has excellent mass production. SOLUTION: This hook-and-loop fastener is the hook-and-loop fastener of a female type constituted by adhering and fixing corrugated fibers 1 having the projecting parts 11 of a bent form at prescribed intervals to a supporting base material 2 of a separate body via connecting parts 12 between the projecting parts and arranging a plural of fibers onto supporting base material and the hook-and-loop fastener of the male type constituted by adhering and fixing the corrugated sheet 3 having the projecting parts of a bent form at a prescribed interval to the supporting base material of the separate body via the connecting parts between the projecting parts and separating the projecting parts to a fibrous form. As a result, the easy molding of even the male type having the projections is made possible by the simple operation of parting the projecting loops. The corrugated materials having the suitable shapes are easily, efficiency and continuously produced with simple equipment, such as gears. The easy, efficient and long-term continuous production is made possible by a series of the simple operations via extrusion molding of thermoplastic resins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to mass production of a female die having a protruding loop, a male die having a hook-shaped or mushroom-shaped projection at its tip, or a male and female die having the die on the same surface or front and back. The present invention relates to an excellent surface fastener and a manufacturing method thereof.

[0002]

BACKGROUND ART Conventionally, as a female surface fastener for locking a male surface fastener having a large number of hook-shaped or mushroom-shaped projections at its tip, a porous flat surface made of woven or non-woven fabric such as piles and knits is used. Material was known. Such a planar material is, so to speak, a substitute for a multi-purpose product, and therefore the characteristics such as the bonding strength and the peeling property have been adjusted only by devising the projection shape of the male surface fastener.

However, there are various restrictions in devising the shape of the protrusions and the like based on the female surface fastener made of a planar material, and the female object for the purpose of forming the surface fastener, that is, on the female surface fastener side. Was long-awaited. By the way, as the above-mentioned restriction, for example, a thin projection is required to be locked to a porous flat material, and it is difficult to increase the bonding strength of the fastener due to its strength problem.

On the other hand, as a manufacturing method utilizing an extrusion molding method in which a thermoplastic resin is molded into a predetermined shape to form a hook-and-loop fastener, a hole formed in a die wheel is filled with a molten resin to form a protrusion, A continuous manufacturing method has been known in which the tip end portion of the protrusion is formed into a hook shape or a mushroom shape to form a base material integrated type (Japanese Patent Publication No. 1-501775 and Japanese Patent Publication No. 6-500).
486, JP-A-6-102). The above-mentioned publication also proposes a method of continuously producing a state in which protrusions are provided on both sides, but in each case, it was a method of producing a male surface fastener having protrusions.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to obtain a surface fastener which has a loop-shaped convex portion in an upright state and can be used for forming a male type having a protrusion and is excellent in mass productivity.

[0006]

According to the present invention, a corrugated fiber having convex portions in a bent form at a predetermined interval is adhesively fixed to a separate supporting base material through a connecting portion between the convex portions, to thereby form a supporting base material. A female surface fastener characterized by arranging a plurality of the fibers on the top, and a corrugated sheet having a convex portion in a bent form at a predetermined interval, separately provided via a connecting portion between the convex portions. The present invention provides a female hook-and-loop fastener, characterized in that it is adhered and fixed to a supporting base material, and its convex portions are separated into fibrous shapes.

[0007]

According to the present invention, a male type having a protrusion having a fibrous loop in a rising state and having a protrusion by a simple operation for dividing the rising loop can be easily formed. It is possible to obtain a female hook-and-loop fastener which can be manufactured with simple equipment such as a gear and is excellent in mass productivity. Further, the production method of the present invention is capable of easily and efficiently continuously producing corrugated products of appropriate shapes via gears and is excellent in mass productivity of surface fasteners, and particularly extrusion molding of a supporting base material using a thermoplastic resin. In such a method, the adhesion treatment with the corrugated material can be easily and efficiently performed by a series of simple operations through the extrusion molding. Further, in the method of forming a corrugated product by extruding a thermoplastic resin as well, it is possible to efficiently and continuously produce a surface fastener from a fiber or sheet and a supporting base material through a series of simple operations. it can.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The surface fastener (fiber type) of the present invention
Is a method of bonding a plurality of corrugated fibers having bent convex portions at predetermined intervals to a separate supporting base material through a connecting portion between the convex portions, and disposing a plurality of the fibers on the supporting base material. It is a female type. An example thereof is shown in FIGS. 2 (a) and 2 (b). Reference numeral 1 is a wave-shaped fiber, 11 is a convex portion of the bent shape, 12 is a connecting portion between the convex portions, and 2 is a supporting base material. The fiber-type hook-and-loop fastener has advantages that it is not necessary to cut and separate the convex portion into a fibrous shape, the number of manufacturing steps is small, and the manufacturing efficiency is excellent.

Further, another type of surface fastener (sheet type) of the present invention is to use a corrugated sheet having bent convex portions at predetermined intervals as a separate supporting base material through a connecting portion between the convex portions. It is a female type that is fixed by adhesion, and the protrusions are separated into fibers. An example thereof is shown in FIG. 3 is a corrugated sheet, 31 is a bent convex portion, 32 is a connecting portion between the convex portions, 33 is a break, and 2 is a supporting base material as described above. The sheet-type hook-and-loop fastener has the advantage that the adhesion area with the supporting base material can be increased and the protrusions and the like are less likely to peel off than the supporting base material.

The above-described female type surface fastener of the fiber type is manufactured by, for example, a method of supplying a plurality of fibers between gears to form a corrugated shape, and then bonding and arranging the fibers on a supporting base material. be able to. Further, for manufacturing a sheet-type female hook-and-loop fastener, for example, a sheet is supplied between gears to be formed into a corrugated shape, which is then adhered onto a supporting base material, and thereafter, the corrugated sheet is formed into a bent convex portion. It can be performed by a method such as making a cut into a fibrous shape.

The method of forming a fiber or sheet into a corrugated shape via the above-mentioned gear is a preferable method from the viewpoint of production efficiency and the like, which enables continuous production of surface fasteners. In the present invention, for example, a fiber or sheet may be placed between a molding die such as a plate having an uneven structure similar to the teeth of a gear, and it may be pressed to form a wavy shape. The fibers or sheets may be formed by any suitable method. In forming the corrugated shape, for example, when a fiber or sheet is used in advance, an appropriate treatment such as heat treatment or shape fixing treatment can be performed as necessary.

As the corrugated fiber or sheet, a fiber or sheet which can be bent into a corrugated shape through a gear or the like and which is made of an appropriate material such as metal or plastic can be used. The wide range of material selection enables the strength setting of the surface fastener and the like to be appropriately performed according to the purpose of use.

The supporting base material for adhering and fixing the corrugated fiber or sheet is not particularly limited, and a sheet-like material made of an appropriate material such as metal or plastic can be used. Further, a porous material such as a woven or non-woven fabric such as a pile or a knitted fabric, a net such as a wire mesh, or the like, to which hook-shaped or mushroom-shaped projections at the tips can be bonded can be used as the supporting substrate. The supporting base material may be formed as a composite material such as a laminate of a plurality of materials.

The supporting base material may be provided with an undercoat layer for the purpose of improving the adhesiveness or the adhesiveness with the corrugated fiber or sheet. In particular, in the case of the fusion treatment, a layer made of the same or different type of good fusion-bonding resin or an adhesive which facilitates the fusion treatment may be provided on the surface of the support substrate on the fusion side. The layer can be formed by an appropriate method such as an extrusion laminating method or a coating method of a solution or emulsion solution with a solvent.

Adhesive fixation between the corrugated fiber or sheet and the supporting base material is carried out by an appropriate method such as a method in which the fiber or sheet is pressed and fixed to the supporting base material via the tooth top of the gear. You can That is, the corrugated shape of the fiber or sheet can be adhered to the supporting base material through the top or bottom of the corrugation while maintaining the corrugated shape of the fiber or sheet as needed. An adhesive may be used as necessary for the adhesive fixing, and heat-bonding treatment such as fusion bonding is also possible depending on the material such as plastic.

In the case of a corrugated fiber, a plurality of threads are arranged on the supporting base material at appropriate intervals as illustrated in FIG. 2 (b). On the other hand, in the case of a corrugated sheet, FIG.
As illustrated in FIG. 3, the bent convex portion 31 of the corrugated sheet provided on the supporting base material is provided with a slit 33 to be separated into fibers. The cut can be made to the whole or part of the convex portion through an appropriate cutting means such as a rotary blade, a heater wire, and a laser beam.

In the present invention, a particularly preferable method from the viewpoint of manufacturing efficiency by continuous manufacturing is a method of manufacturing the supporting base material with a thermoplastic resin. That is, in the manufacturing method for forming a corrugated shape by supplying a plurality of fibers or sheets between the above-described gears, a gear and a roll arranged to face the gear that corrugates and conveys the plurality of fibers or sheets. During that, a thermoplastic resin is extruded into a sheet shape and supplied while forming a supporting base material, and the plurality of fibers or sheets are pressure-bonded and fixed to the supporting base material via the tops of the gears that convey the fibers or sheets. Method, especially the method of fusion.

In the case of the above-mentioned method, the corrugated fiber or sheet can be efficiently subjected to the adhesion treatment while forming the supporting base material through the extrusion molding. Further, an appropriate material such as metal or plastic can be used for the fiber or the sheet.

In the method of manufacturing using the above-mentioned thermoplastic resin, a more preferable method from the viewpoint of manufacturing efficiency by omitting steps, etc., a fiber or sheet for forming a corrugated product is extruded from the thermoplastic resin to form a series. It is a method of forming.
That is, a thermoplastic resin is extruded into a plurality of strips of fibers or sheets and supplied between gears to be molded and solidified into a corrugated shape, and the corrugated fibers or sheets are separately pressure-bonded to a supporting base material for extrusion molding. It is a method to do.

In the case of the above-mentioned method, it is possible to efficiently perform a series of operations from the formation of a plurality of fibers or sheets and their corrugation and the formation of the supporting base material to the production of the target hook-and-loop fastener. Similarly, the corrugated fiber or sheet can be efficiently subjected to the adhesion treatment while forming the supporting substrate through the extrusion molding.

The manufacturing process according to the above method is shown in FIG.
According to this, a thermoplastic resin is extrusion-molded 42 into a plurality of fibrous or sheet-like shapes through a nozzle of the extruder 4 or a molding die 41 such as a T-die, and is meshed with a predetermined gap. While being supplied between the gears 43 and 44 to be molded and solidified into a wave shape to form the fiber 1 or the sheet 3, the gear 44
The molded product is conveyed along the rotation of the gear via the. The gears 43 and 44 are driven in reverse rotation as indicated by arrows.

On the other hand, separately from the above-mentioned formation of the fibrous or sheet-shaped molded product, a molding die 51 such as a T-die of the extruder 5 is formed.
A thermoplastic resin is extrusion-molded 52 into a sheet form to form a supporting base material, and the supporting base material is supplied between the corrugated gear 44 for solidification of the corrugated shape and the roll 53 arranged opposite thereto, thereby The shape-formed solidified matter (1, 3) is pressure-contacted and fixed (fused) to the supporting base material 2 through the tops of the gears 44 that form and convey it.

When the molded product is a corrugated sheet, the rotary blade 6 is arranged so as to face the roll 53 as shown by an imaginary line in FIG. The bent convex portion 31 in 3 is cut into a fibrous shape. The obtained female hook-and-loop fastener is wound by the winder 7. A take-up device, a guide roll, or the like may be arranged between the roll 53 and the winder 7 if necessary.

The above-mentioned manufacturing method has the advantage that the manufacturing process can be simplified, such as the process from the formation of the corrugated fiber or sheet and the supporting base material to the manufacturing of the hook-and-loop fastener can be easily carried out in a series of manufacturing processes. In addition to having it, it also has the advantage that the fiber can be formed as a monofilament.

Any appropriate gear may be used as the gear.
Preferably, the roll surface has a gear shape from the viewpoint that it doubles as a cooling roll for cooling and solidifying the molded product into a corrugated fiber or sheet to maintain the shape. The cooling roll can employ an appropriate cooling method such as a method of controlling the temperature by passing a cooling liquid such as water or hot water through a passage inside the roll. Further, the roll driving method is also arbitrary such as a method using a rotary driving shaft. When the fiber or sheet is used in advance, the gear does not have to be a cooling roll, and the fiber or sheet is supplied between the gears according to the extruded product 42 and corrugated.

The formation of the gear serving also as the cooling roll is as follows.
For example, a method in which the surface of a usual cooling type roll is made into a gear form by milling or the like, or a method in which a plate material is processed into a gear form by laser processing or wire processing and is wound and fixed on the surface of a usual cooling type roll. It can be performed by an appropriate method. Incidentally, in the latter winding fixing method, it is also possible to laminate a predetermined processed plate to give a gear form having a required unevenness depth.

The tooth form of the gear is not particularly limited, and can be appropriately determined according to the wave shape for the purpose of formation. It is possible to control the size of the convex portion in the corrugated fiber or sheet to be formed, depending on the tooth shape and size of the gear. By the way, Fig. 4 (a), (B),
(C) Waveforms 13, 14, 1 different from the above embodiment
5 was illustrated.

The spur gear form is preferable from the point of adhering and fixing with a large adhesive force via the connecting portion between the convex portions in the corrugated fiber or sheet, but the purpose is to sequentially shift the arrangement position of the convex portions. It can also be in the form of a helical gear. A convex portion having a zigzag shape or an M-shaped bending like the convex shape 15 of (c) described above is advantageous for forming a dividing projection having an excellent coupling force, but such a bending shape is a tooth in a gear. It can be formed by a method of providing a convex portion or a concave portion at an appropriate portion such as a top portion or a bottom portion of the portion.

The thermoplastic resin used in the above extrusion molding is not particularly limited. For forming the corrugated fibers or sheets, polypropylene, polyethylene such as high density material, acrylic polymer, ABS resin, polycarbonate, PBT resin,
Polyamide, polyester, polyacetal, acrylonitrile / butadiene / styrene copolymer, polystyrene, ethylene / vinyl alcohol copolymer, ethylene /
A hard material such as a propylene copolymer is preferably used. Above all, those having a tensile elastic modulus at room temperature of 1 × 10 ⁸ dyn / cm ² or more, particularly 1.1 × 10 ¹⁰ dyn / cm ² or more, are preferable.

When a corrugated fiber or sheet is formed by solely using a thermoplastic resin having a low tensile elastic modulus such as low density polyethylene, an ethylene / vinyl acetate copolymer, or an ionomer resin in the above description, the fastener has a poor strength and is fastened. In some cases, the fixing capacity required for practical use can be satisfied by improving the tensile elastic modulus by using a petroleum-based resin, wax or the like together. Therefore, in the present invention, two or more kinds of thermoplastic resins may be blended and used.

The combined use of the above-mentioned petroleum-based resin and wax is also effective as a regulator for improving or lowering the tensile elastic modulus of a hard thermoplastic resin, and also for the adhesiveness or fusion property to a supporting substrate, or It is also effective as an agent for controlling the ductility or stringiness when the projection is divided to form a hook-shaped or mushroom-shaped projection at the tip. By adjusting the above-mentioned tensile elastic modulus, it is possible to control the bonding strength when the protrusions or protrusions are formed.

The thermoplastic resin for forming the supporting substrate has a glass transition point of 0, such as polypropylene, polyester and polyvinyl alcohol, from the viewpoint of processability.
Polyurethanes and vinylidene chloride having a temperature of not less than 0 ° C. are preferably used in view of flexibility and the like. When the function as an adhesive is desired to be predominant, a hot melt adhesive resin or the like is preferably used. From the viewpoint of fusion property, it is preferable to form the corrugated fiber or sheet and the supporting base material with the same kind of thermoplastic resin.

A multi-layer extrusion method may be used to form a supporting base material made of a laminated sheet, and the side of the corrugated fiber or sheet to be adhered may be a resin layer having a good adhesion property to perform a good fusion bonding process. You can The above-mentioned lamination method by multi-layer extrusion can be applied as necessary even when forming a corrugated fiber or sheet, particularly a sheet.

The diameter or thickness of the corrugated fiber or sheet and the supporting substrate formed in the above is not particularly limited, and is appropriately determined according to the purpose of use of the surface fastener such as material and intended bonding strength. can do. Generally,
1 μm or more, especially 10 μm to 1 mm, especially 100 to 700 μ
The diameter or thickness is m, but the diameter or thickness may be 2 mm or more.

In the case of fiber formation by the extrusion method, the thickness and the number of threads of the fiber can be controlled by the diameter and the number of holes provided in the molding die, and the number of threads may be appropriately determined. Generally, the number of articles is 2 or more, especially 3 to 1000, and especially 5 to 100.
The distance between the fibers can also be determined as appropriate, but in general it is 20 mm.
In the following, the fiber spacing is 0.1 to 15 mm, especially 0.3 to 10 mm.

The female surface fastener of the present invention is a male or female-type surface fastener having a hook-shaped or mushroom-shaped projection at its tip by dividing all or part of the convex portion. You can also FIG. 5 exemplifies a male hook-and-loop fastener formed by dividing substantially all of the protrusions. Further, FIG. 6 exemplifies the same-face male-and-female type surface fastener obtained by dividing a part of the convex portion. The tips of the protrusions 21 and 22 that divide the convex portion 11 are hook-shaped protrusions.

The above-mentioned same-face male and female type surface fasteners can form a combined state with each other and there is no need to distinguish between male and female, and it is possible to avoid the occurrence of a female-male combination error. Further, it has an advantage that it can be used as a female type or a male type. In the case of forming a male-female type on the same surface, the ratio of the protrusions left can be appropriately determined depending on the bonding strength, removability and the like.

Generally, two protrusions are formed from one convex portion, and two or more protrusions can be locked by one convex portion. Therefore, it is 10 to 90%, especially 20 to 70%. Especially 30 ~
60% of the protrusions are left. Further, the distribution state of the protrusions may be appropriately determined according to the bonding strength and the like, but it is preferable to leave them in the vertical or horizontal row unit from the viewpoint of manufacturing efficiency and the like.

The projecting portion can be divided by using an appropriate cutting means such as a rotary blade, a heater wire, a laser beam, and the like, and the projection 23 illustrated in FIG.
Protrusions of various shapes such as 24 and 25 are formed according to the shape of the convex portion. As shown in the figure, the protrusion is entangled with the convex portion forming the female mold or the fibers or threads of the porous material, or is fitted between the fibers to be hooked, for example, hook-shaped or hook-shaped or mushroom-shaped. Can be formed into a predetermined shape by an appropriate method such as a method of heat-treating the tip portion after the cutting. The protrusion having a mushroom-shaped tip may be formed by dividing the protrusion by heating.

The density of general protrusions or projections in the surface fastener according to the present invention is 1 or more per cm ² , preferably 3 to 1000, especially 5 to 500, but is not limited thereto. The height of the protrusions or projections can be appropriately determined according to the purpose of use and the like, but from the viewpoint of strength and the like, it is preferably 5 mm or less, more preferably 0.1 to 3 mm, and particularly preferably 0.4 to 1 mm.
The surface fastener is preferably as thin as 1 mm or less including projections or protrusions, and its dimensions are appropriately determined according to the purpose of use.

The male hook-and-loop fastener formed by the above-mentioned convex part cutting can be used for connection with the female hook-and-loop fastener according to the present invention, and it can also be used with a porous material such as woven fabric or nonwoven fabric such as piles and knits. Can also be used to combine
Also, the female hook-and-loop fastener according to the present invention can be used for connection with a conventional male hook-and-loop fastener.

Further, in the present invention, male and female hook-and-loop fasteners can be formed on the front and back. Such a male and female hook-and-loop fastener has a form having a layer capable of coupling the projections on the back surface without the projections of the same-faced male and female or male hook-and-loop fasteners, and the projections on the front surface side of the back surface side It has the advantage that it can be bonded to a bondable layer to form a ring-shaped material and can also be used as a binding tool for rods such as pipes and rods, and wire rods such as electric wires.

The formation of the male and female surface fasteners according to the present invention is carried out, for example, by using a conventional male surface fastener on the back surface of the female or same-faced male and female surface fasteners having no convex portion of the supporting base material. Adhesive fixing method, or in the female, same-faced male / female or male type surface fastener according to the present invention, at least the back surface having no protrusion or protrusion of the supporting substrate is formed of a porous material layer capable of bonding the protrusion. It can be performed by the method.

As a concrete example of the latter one using the porous material, as shown in FIG. 8, a projection is bonded to the back surface of the supporting base material 2 of the female type, the same side male and female type or the male type surface fastener according to the present invention. A porous material 8 capable of being bonded is optionally bonded via an adhesive layer, and in the case of a female mold, the convex portion is divided to form a male and female mold on the same surface or a male mold, or A method of forming a female surface fastener according to the present invention using a flexible material and then dividing a part or all of the convex portion to form a male and female surface fastener of the same surface can be cited.

In the latter method described above, corrugated fibers or sheets are adhered via an adhesive layer if necessary,
Since the supporting substrate itself is a porous material, it has an advantage that it can be made thin. The female hook and loop fastener having a porous material on the back surface can also be put to practical use as a double-sided female fastener.

In the present invention, a female or same-faced male and female surface fastener and a same-faced male and female or male surface fastener are joined through a supporting base material to obtain a male and female surface fastener on the front and back sides. You can also The example is shown in FIG. this is,
The female surface fastener and the male surface fastener are adhered to each other via the adhesive layer 9 on the supporting substrate side.

A preferred method of manufacturing the above-mentioned front and back male and female type fasteners comprising hook-and-loop fasteners according to the present invention is a method using two pairs of paired gears as illustrated in FIG. That is, in accordance with the formation of the corrugated fiber or sheet described above, a plurality of strips of fiber or sheet 45 and 46 are supplied between the counter-rotating gears that are meshed with each other with a predetermined gap being formed into a corrugated shape. The process of conveying the molded product along one of the gears along the rotation of the gear is performed by a set of gears 43 and 44 and a gear 47,
Perform with two pairs of 48 sets.

In addition to the above, the set of gears 43 and 44 and the set of gears 47 and 48 are symmetrically arranged, and the corrugated fibers or sheets 45 and 46 forming the front and back and the support base 54 are superposed. The gears 44 and 47 are arranged with a gap corresponding to the thickness, and the corrugated fibers or sheets formed through the rotation of the gears by the rotation as shown by the arrows merge between the gears 44 and 47. In this case, the supporting base material 54 of extrusion molding is supplied and bonded between the confluences, and in the case of the sheet type, the convex parts are cut to form a fibrous shape, and the convex parts are provided on both sides of the supporting base material. This is a method for obtaining a surface fastener of a double-sided female type and dividing a predetermined portion of the convex portion to obtain a surface fastener of a female type or a same-sided male / female type on one side and a same-sided male / female type or a male type on the other side.

According to the above-described method, the corrugated fibers or sheets forming the front and back can be bonded to one supporting base material in a series of steps, and the supporting base material can be shared to reduce the thickness. You can measure. The above method can also be applied as a method in which a plurality of fibers or sheets described above are extrusion-molded with a thermoplastic resin and supplied between gears. It can also be applied as a method of supplying as a supporting base material formed in advance. In the front and back male and female type surface fasteners, the corrugated material forming the front and back may be any of its material, shape, fiber type and sheet type, and may be any combination.

Each type of surface fastener according to the present invention may have a pressure-sensitive adhesive layer or a hot-melt adhesive layer on the back surface of the supporting substrate which does not have any protrusions or projections. An example thereof is shown in FIG. Reference numeral 9 is an adhesive layer composed of an adhesive layer or a hot melt adhesive layer. Such an adhesive layer is used for appropriate adhesion such as attaching the porous material entirely or partially, or adhesively fixing it to an attachment target such as clothing. Note that FIG. 11 shows a state in which the adhesive layer is temporarily attached and protected by the separator 91.

The adhesive layer may be attached in advance to be used as a supporting base material having an adhesive layer, or an adhesive layer may be provided on the back surface of the supporting base material after the surface fastener is formed to have this form. Examples of the adhesive include acrylic-based, rubber-based, silicone-based pressure-sensitive adhesives, hot-melt adhesives,
Alternatively, an appropriate adhesive such as other adhesive can be used, and generally, an adhesive that can bond more strongly than the binding force of male and female of the surface fastener is used.

The hook-and-loop fastener according to the present invention can be used for various purposes such as clothes, disposable diapers, shoes and bags, and fasteners for various articles such as building materials and automobile articles. The performance of surface fasteners is various combinations of protrusions and supporting base materials depending on the required performance such as bonding strength, peelability, durability, flexibility, flexibility, and texture depending on the purpose of use such as location and number of uses. It can be set appropriately according to the requirements.

Further, in the present invention, a substantially double-sided male and female hook-and-loop fastener having front and back surfaces of either male-female type or male-type can be used. Such a double-sided male surface fastener can be used, for example, when joining porous materials to each other or when fixing an accent lug on a carpet.

[0054]

【Example】

Example 1 Polypropylene was melt extruded into a plurality of monofilaments through an extruder provided with a die having a large number of holes each having a diameter of 0.5 mm formed in a horizontal row at intervals of 1.5 mm. A pair of cooling take-up rolls having an outer diameter of about 50 mm, which had been surface-processed in a state, were supplied while being meshed with each other with a gap of about 0.5 mm, and molded and solidified into a wave-shaped fiber corresponding to a spur gear shape.

On the other hand, the same polypropylene as the above is melt extruded into a film having a thickness of about 0.1 mm through a separate extruder provided with a T-die, and the melt is extruded onto the lower roll of the cooling take-up roll in the meshed state. It is supplied between the crimping rolls arranged opposite to each other, and is melted under pressure contact via the tops of the rolls and the plural monofilaments that are conveyed while maintaining the corrugated shape via the cooling take-up roll on the lower side. The adhesive treatment was performed to obtain a female surface fastener in which a plurality of monofilaments were adhesively arranged on a supporting substrate (polypropylene film) at predetermined intervals (FIG. 1).

Example 2 A laminate of a corrugated sheet and a supporting substrate according to Example 1 except that a corrugated sheet was formed by using an extruder provided with a T die instead of the monofilament molding die. After that, cuts were made at 1 mm intervals in the convex portions of the corrugated sheet through a rotary blade having multiple blades to obtain female surface fasteners (FIG. 1: phantom line).

Example 3 Instead of the extrusion feeding method through a T-die, a supporting base material in which an ethylene / vinyl acetate copolymer film was laminated on one side of a knitted fabric was supplied, and polypropylene fibers were fed through the film layer. Fusing with a heating take-up roll,
After obtaining a female surface fastener having a convex portion based on the corrugated fiber on a knitted substrate, the central portion of the convex portion has a diameter of 0.4.
A male type was obtained by melting and dividing through a mm heater wire, and male and female type surface fasteners were formed on the front and back sides having hook-like protrusions on one side.

Example 4 In place of the pressure-bonding rolls, a pair of take-up rolls whose surfaces are in the form of spur gears were provided with a predetermined gap (about 0.9 mm) symmetrically so as to rotate in the opposite direction to the upper set, according to FIG. 10 stainless steel wires with a diameter of 10 μm between each pair of upper and lower paired gears.
According to the same manner as in Example 1, the 0-rows were arranged in a horizontal row at intervals of 2 mm and supplied, and the two upper and lower rows of the corrugated stainless steel wire were conveyed through a take-up roll and merged together in accordance with Example 1. Supplying an extruded product of ethylene-vinyl acetate copolymer for material, bonding the above-mentioned corrugated stainless wire to the front and back of the supporting base material, and a double-sided female surface fastener having convex portions based on the corrugation After that, the central portion of the convex portion on one surface was divided through a rotary blade to form a hook-shaped projection at the tip, and male and female type surface fasteners were obtained on the front and back.

Example 5 50% of the convex portions on each surface of the double-sided female type surface fastener formed in accordance with Example 4 were divided, and the pair of tip portions due to the division and the maintenance portion of the convex loop were hooked. The same-faced male and female hook-and-loop fasteners in which the protrusions were alternately arranged were obtained.

Example 6 An acrylic double-sided pressure-sensitive adhesive tape having a thickness of 50 μm, one side of which was covered and protected by a separator, was attached to the surface of the surface fastener obtained in Example 1 having no convex portion, and the separator was peeled off to give an example. After the surface having no convex portion of the surface fastener obtained in 1 was adhered to obtain a double-sided female surface fastener, the single-sided convex portion was divided according to Example 3 to obtain male and female surface fasteners on the front and back sides. Formed.

Evaluation Test The bond strength in the male and female bond of the surface fastener obtained in the example was examined. The results are shown in the following table. Unit of bond strength: kg / 10mm

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a manufacturing process example.

FIG. 2A is a side sectional view of an example of a female surface fastener, and FIG. 2B is a front sectional view of the example.

FIG. 3 is a front cross-sectional view of another female surface fastener example.

FIG. 4 is an explanatory view of an example of a convex shape.

FIG. 5 is a side sectional view of an example of a male surface fastener.

FIG. 6 is a side cross-sectional view of an example of same-faced male and female fasteners.

FIG. 7 is an explanatory view of an example of a protrusion shape.

FIG. 8 is a side sectional view of an example of male and female type surface fasteners on the front and back sides.

FIG. 9 is a side sectional view of another male and female type surface fastener example on the front and back sides.

FIG. 10 is an explanatory diagram of another manufacturing process example.

FIG. 11 is a side sectional view of still another female surface fastener example.

[Explanation of Codes] 1: Fiber 11: Convex part 12: Contact part 2: Support base material 3: Sheet 31: Convex part 32: Contact part 33: Break 4,5: Extruder 42, 52, 54: Extruded product 6: Rotary blade 8: Porous material 9: Adhesive layer 13, 14, 15: Convex portion 21, 22, 23, 24, 25: Protrusion 43, 44, 47, 48: Gear wheel 45, 46: Prefabricated fiber or sheet

Claims (10)

[Claims] 1. A corrugated fiber having convex portions in a bent form at a predetermined interval is adhesively fixed to a separate supporting base material through a connecting portion between the convex portions, and the fiber is placed on the supporting base material. A female hook-and-loop fastener characterized in that a plurality of them are arranged. 2. A corrugated sheet having bent convex portions at predetermined intervals is adhered and fixed to a separate supporting base material via a connecting portion between the convex portions, and the convex portions are formed into a fibrous shape. Female hook and loop fasteners characterized by being separated. 3. The male or the same surface, characterized in that all or part of the convex portion of the surface fastener according to claim 1 or 2 is divided to form a hook-shaped or mushroom-shaped projection at the tip. Male and female face fasteners. 4. The surface fastener according to any one of claims 1 to 3, wherein the back surface of the support base material having no protrusions or projections is a porous material layer to which hook-shaped or mushroom-shaped projections can be joined at the tip. Consisting of. 5. The surface fastener according to claim 1, further comprising an adhesive layer or a hot-melt adhesive layer on the back surface of the supporting base material having no convex portion or projection. 6. A female / female type, male / female type or male / male type surface fastener consisting of a joined body with a support base material of the surface fastener according to any one of claims 1 to 3. 7. A method of manufacturing a female hook-and-loop fastener, comprising feeding a plurality of fibers between gears to form a corrugated shape, and then adhesively arranging the fibers on a supporting base material. 8. A sheet is fed between gears to form a corrugated shape, the corrugated sheet is adhered to a supporting base material, and then the corrugated convex portion of the corrugated sheet is cut into a fibrous shape. And a method for manufacturing a female hook-and-loop fastener. 9. The manufacturing method according to claim 7, wherein the thermoplastic resin is formed into a sheet shape between a gear that forms and conveys a plurality of strips of fibers or sheets in a corrugated shape, and a roll arranged opposite to the gear. A method of supplying while forming a supporting base material by extrusion molding, and pressingly fixing the plurality of fibers or sheets to the supporting base material through the tops of the gears that convey the fibers or sheets. 10. The manufacturing method according to claim 9,
A method of forming a corrugated fiber or sheet by extruding a thermoplastic resin into a plurality of strips of fiber or sheet and supplying it between gears to form and solidify into a corrugated shape.