JP2000236919A - Male formed plane fastener member having adhesive layer and process therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a male-formed plane fastener member capable of ensuring a required adhesive force to an adherend from a low temperature to a high temperature and, which has an adhesive layer that, even if the rolled male plane fastener member is rewound, its adhesive substance would not shift to an engaging head part. SOLUTION: In a male-formed plane fastener member 1 made of thermoplastic synthetic resin having a numerous hook-shaped engaging elements 3 on one surface of a sheet-like base material 2 and an adhesive layer 4 made of an adhesive substance on the underside of the base material 2, at least peeling of the surface parts of the hook-shaped engaging elements 3 from the adhesive layer 4 is easy, and a composing element constituting a boundary face between itself and at least the adhesive layer 4 of the sheet-like base material 2 has a sufficient affinity to the adhesive material. Thereby, even by an environmental change of the surroundings, a required adhesive force to the adherent goods is ensured, and at the time of producing this male-formed plane fastener, the hook-like engaging elements in a lower layer of a rolled body to be rolled and the adhesive layer adhere to each other without deforming the rolled form, and there is no shifting of the adhesive substance to the hooks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin male fastener member having a plurality of hook-shaped engaging elements which engage with and disengage from a female fastener member having a large number of loops on the surface of a sheet-like substrate. In particular, the present invention relates to a male molded surface fastener member having a pressure-sensitive adhesive layer on the back surface of a sheet-like substrate on which a large number of hook-shaped engaging elements are integrally molded.

[0002]

2. Description of the Related Art A male fastener member having a plurality of hook-like engaging elements on one surface of a sheet-like base material and a loop of a female fastener member having a plurality of loops on one surface of a sheet-like base material. A so-called hook-and-loop fastener, in which a hook is engaged to form a fixing tool, is widely known. In recent years, a male fastener member integrally molded from a thermoplastic resin instead of a conventional male fastener member made of fiber has been used in various fields such as a fixing member of an industrial product from a fixing tool of a disposable diaper, for example. .

Recently, as disclosed in Japanese Patent Publication No. 8-508910, for example, the size of the hook-shaped engagement element has been reduced, and a loop generally known as a mating female surface fastener member has been used. It is not limited to woven and knitted products obtained by weaving and knitting integrally with cloth, but nonwoven products and paper products with a general structure that were conventionally difficult to disengage are used as female fastener members and project from the surface. Even small loops can be disengaged. The male molded surface fastener member having such minute hook-shaped engaging elements is continuously molded, and is usually wound up in a roll shape and carried out. At this time, as described in the above-mentioned publication, an adhesive substance is conventionally attached to the back surface of the male-faced fastener member so that the carrying-out form can be maintained and, for example, the body can be pressed and attached to the main body of the disposable diaper product. Is often applied.

[0004]

By applying an adhesive substance to the back surface of the male fastener member, not only the above-mentioned function is provided but also as described in the above-mentioned publication, Since the adhesive strength is such that the layer can be easily peeled off from the engaging head of the lower winding layer of the male molded surface fastener member wound in a roll shape, not only is the release paper unnecessary, but also in use. Is attached by unwinding the male molded surface fastener member from a roll body of a required length, cutting it out, and bonding it to an article such as a flap such as a disposable diaper or general clothing.

[0005] Accordingly, the function required of the adhesive layer is such that the adhesive layer has such an adhesive strength that it can be easily peeled off from the engaging head of the hook-shaped engaging element of the male molded surface fastener member, and at the same time, disposable diapers and clothing. It is necessary to have contradictory adhesive properties such as having a strong adhesive force to the adherend surface. On the other hand, the male fastener is required to have a required engaging force, a peeling force, and an engaging ratio with a mating female fastener member.

However, the adhesive strength of an adhesive substance changes depending on the ambient temperature. Generally, the adhesive strength decreases at low temperatures, increases at medium temperatures (normal temperature to 80 ° C.), and further increases. When the temperature rises, the liquefaction of the adhesive substance progresses, and conversely, the adhesive strength decreases, and when the adhesive substance is to be peeled off from the adhesive layer, the adhesive substance is easily transferred to the adherend surface of the other party.

[0007] In order to secure the adhesive strength even at a low temperature, liquefaction of the adhesive substance starts as described above even at a medium temperature of 50 ° C to 60 ° C, and the engaging head is adhered to the layer of the adhesive substance. When the male molded surface fastener member wound in a roll shape is unwound, the adhesive substance is easily transferred to the engaging head. When the adhesive substance is transferred to the engaging head, not only does the adhesive strength of the male fastener member to the adherend decrease, but also when the male fastener is to be engaged with the female fastener of the other party. The adhesive substance transferred to the engaging head adheres to the loop of the female fastener or prevents the loop from being inserted, and the movement of the loop is blocked. It does not engage and cannot function as a hook-and-loop fastener.

On the other hand, if an appropriate adhesive strength is to be ensured without shifting to the engaging head even at a certain high temperature, the adhesive strength at normal temperature or lower decreases, and the adhesive strength peeling off from the adherend decreases. Therefore, the original function of the adhesive layer is lost.

The present invention has been made to solve such a conventional problem. Specifically, the present invention can secure a required adhesive force to an adherend from a low temperature to a certain high temperature, and furthermore has a roll-like shape. It is an object of the present invention to provide a male molded surface fastener member having an adhesive layer such that an adhesive substance does not migrate to the engaging head when unwinding the male surface fastener member wound on the member, and a method for manufacturing the same.

[0010]

Means for Solving the Problems and Functions and Effects The above-mentioned object, that is, while ensuring the adhesive force to the adherend,
In order to obtain a male molded surface fastener member having an adhesive layer in which the adhesive substance does not migrate to the engagement head even in a wide range of temperature atmospheres, intensive studies have been made on what means should be adopted.

As a result, it is possible to select a material which can secure a required adhesive force to the adherend even at a desired low temperature and which does not migrate to the adherend even at a high temperature, as well as a sheet of the male fastener member. The constituent material of the adhesive substance coated surface, which is the back surface of the fibrous base material, does not cause delamination between the adhesive layer and the thermoplastic synthetic resin material having an affinity for the adhesive substance, at least. Conclusion that the material of the engaging head should be a thermoplastic synthetic resin material excellent in releasability from the adhesive substance in addition to satisfying the function as the hook-shaped engaging element of the hook-and-loop fastener. Reached.

Here, since the characteristics of the adhesive substance vary depending on the use of the male fastener and the environment in which it is used, it is impossible to uniformly define the desired temperature. In this case, a low-temperature environment in which the adhesive layer is provided may be set according to the use of the male surface fastener and its use environment.

The present inventors have sought more specific means based on the above conclusions, and have found that the above object can be achieved by finally adopting the structure as described in claims 1 to 6. Was.

According to a first aspect of the present invention, there are provided a plurality of hook-like engaging elements which are engaged with and disengaged from a female fastener member having a plurality of loops on one surface of a sheet-like substrate. In the male molded surface fastener member made of thermoplastic synthetic resin having an adhesive layer on the back surface of the base material, the constituent material constituting at least the interface with the adhesive layer of the sheet-shaped base material is the adhesive material Having a sufficient affinity for at least the hook-shaped engagement element
The surface portion of (3) is characterized by being made of a material having low affinity for the adhesive substance constituting the adhesive layer (4).

[0015] That is, the basic structure of the present invention is a male molded surface fastener member having a plurality of hook-shaped engaging elements on one surface of a sheet-like base material. A number of hook-shaped engagement elements,
In addition to having a sufficient function as the male surface fastener, at least the material of the surface portion of the hook-shaped engaging element has sufficient adhesive strength to maintain the roll-shaped winding form of the male molded surface fastener member. At the same time, when unwinding the male molded surface fastener member, the adhesive substance does not transfer to the engaging head of the engaging element, and is constituted by a material having an adhesive property enough to easily peel off, An interface region between the back surface of the sheet-shaped substrate and the surface on which the pressure-sensitive adhesive layer is formed is made of a material having a high affinity for the pressure-sensitive adhesive material to ensure high tackiness.

With this configuration, even when the temperature of the adhesive substance is at a temperature at which liquefaction starts, the adhesive element does not move to the engagement head of the engagement element that is adhered to the adhesive substance, and Since there is no delamination between the body and the adhesive layer, the function as a male fastener is maintained. In addition,
In order to prevent the adhesive substance from migrating to the engagement head of the hook-shaped engagement element, in addition to the means of claim 2 described below,
For example, the release agent may be spray-fixed to the upright surface of the hook-shaped engagement element, or the release agent may be applied only to the engagement head of the hook-shaped engagement element by a roll coater or the like.

As a typical means for realizing the above configuration, as described in the second aspect of the present invention, the hook-shaped engaging member is made of a thermoplastic synthetic resin material to which a release agent is added. A first sheet molded and integrated with the element, and the adhesive layer, a thermoplastic synthetic material having an affinity with the adhesive substance, which is laminated and integrated on the back surface side of the first sheet (2a) by fusion bonding; It is preferable to employ the configuration including the second sheet made of resin, because it is efficiently manufactured by the manufacturing method described in claim 5 described later.

According to a third aspect of the present invention, a third sheet made of fiber is further interposed between the first sheet and the second sheet, and the first sheet and the second sheet are attached to the third sheet. On the other hand, they are integrated by fusion. Since the third sheet made of fiber is fused and integrated between the first sheet and the second sheet, the male molded surface fastener manufactured is reinforced. Further, even if the first sheet and the second sheet are made of materials having no affinity, both the resins are permeated and integrated between the fibers of the third sheet to be firmly laminated. Be integrated.

According to a fourth aspect of the present invention, a plurality of hook-shaped engaging elements are integrally formed on one surface of the sheet-like base material, and an adhesive layer is formed on the back surface of the sheet-like base material. A method of manufacturing a male molded surface fastener member made of a thermoplastic synthetic resin, comprising: driving and rotating a die wheel having a plurality of hook engaging element molding cavities on a peripheral surface in one direction; Disposing the first and second extrusion nozzles opposed to each other with a gap corresponding to the thickness of the sheet-shaped substrate in a direction of rotation of the die wheel; Adding a release agent to the synthetic resin material to reduce the peel adhesive strength to the adhesive layer, extruding the molten resin to which the release agent has been added from the first extrusion nozzle, and From the extrusion nozzle In the manufacturing method of the male molded surface fastener characterized by comprising extruding a molten resin having a serial adhesive material affinity.

According to this manufacturing method, the male molded surface fastener member made of a thermoplastic synthetic resin having the pressure-sensitive adhesive layer according to claim 2 can be efficiently and continuously molded. The adhesive layer can be continuously formed on the back surface of the surface fastener member.

According to a fifth aspect of the present invention, a male molded surface fastener member made of a thermoplastic synthetic resin having the adhesive layer according to the third aspect is extruded from the first extrusion nozzle in order to efficiently and continuously manufacture the member. And introducing a fiber sheet material between the molten resin to be extruded and the molten resin extruded from the second extrusion nozzle.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a partial sectional view of a male molded surface fastener member having an adhesive layer according to a first embodiment of the present invention.

The sheet-like base material 2 of the male molded surface fastener member 1 according to this embodiment comprises a first sheet 2a and a second sheet 2b.
Are laminated and integrated into two layers. And
On the front surface of the first sheet 2a, a large number of hook-shaped engaging elements 3 stand integrally, and on the back surface of the second sheet 2b, an adhesive layer 4 made of an adhesive substance such as a pressure-sensitive adhesive is provided. Is formed. Hook-shaped engagement element 3 shown in FIG.
Consists of a column 3a standing upright from the surface of the first sheet 2a, and a pair of engaging heads 3b that branch off at the upper end of the column 3a and extend forward and backward. The form of the hook-shaped engaging element 3 is not limited to the illustrated example, and may be, for example, a simple hook form that is curved and extends from the upper end of a well-known standing part. .

The hook-shaped engaging element 3 is a first sheet 2a.
As described later, the first sheet 2a is integrally formed with the surface of the first sheet 2a. Further, the second embodiment according to the present embodiment.
The sheet 2b is used when the first sheet 2a is formed.
A sheet-like molten resin is introduced into the surface opposite to the surface on which the hook-shaped engaging element 3 of FIG. Thus, after the first sheet 2a and the second sheet 2b are laminated and integrated, an adhesive substance is applied to the surface of the second sheet 2b by an ordinary method to form the adhesive layer 4.

The first sheet 2a is the most characteristic component of the present invention, and its constituent material is mainly composed of a thermoplastic synthetic resin used for this type of male molded surface fastener. Examples thereof include polyester, polyvinyl, and polyolefin. In this embodiment, a release agent is added to such a main component together with other additives such as a plasticizer. Examples of the release agent include a reactive silicon fluorochemical polymer, epoxy silicon, and a radiation-curable polyorganosiloxane polyurea block copolymer. The amount added depends on the main component. As described above, when an appropriate amount of the release agent is added to the first sheet 2a, the first sheet 2a can be adjusted to a desired adhesive strength with respect to the adhesive layer.

On the other hand, the second sheet 2b must not easily delaminate from the adhesive layer. For that purpose, it is necessary to set the adhesive strength of the pressure-sensitive adhesive layer 4 to the second sheet 2b so as to have a required value according to the application. The simplest method is to select, for the second sheet 2b, a material having excellent wettability, that is, affinity with the adhesive substance. Further, in this embodiment, there must be an affinity between the first sheet 2a and the second sheet 2b. Most preferably, the materials of the synthetic resin raw materials, which are the main components of the first sheet 2a and the second sheet 2b, are matched. However, as long as the second sheet 2b has an affinity for the first sheet 2a and the adhesive substance, different synthetic resin raw materials can be used as main components.

As the above-mentioned adhesive substance, various natural rubbers are mainly used, which are dissolved in a solvent and added with a tackifier resin such as rosin, petroleum resin and terpene resin, an antioxidant and a softener, or Acrylic copolymers,
An adhesive made of a hot-melt resin such as synthetic rubber is used.

FIG. 2 shows an example of a molding apparatus and a molding procedure of the male molded surface fastener 1 having the adhesive layer 4 having the above-described configuration. According to the illustrated example, the forming apparatus 100 has a plurality of preforming cavities 101a for the hook-shaped engaging elements 3 formed on a peripheral surface thereof, and a die wheel 101 having cooling means (not shown) therein, and a die wheel 101 having the same. And a single extrusion die 102 having first and second extrusion nozzles 102a and 102b in the form of long slits facing each other with a predetermined gap formed therebetween. The die wheel 101 is driven and rotated in one direction by a driving device (not shown). Further, the first and second extrusion nozzles 102a, 1
02b is connected to different resin flow paths 103a and 103b formed in the extrusion die 102, and a molten resin added with a release agent from a first extrusion nozzle 102a provided on the upstream side in the rotation direction of the die wheel 101. Is extruded, and a molten resin to which a release agent is not added is extruded from a second extrusion nozzle 102b provided at an interval downstream of the first extrusion nozzle 102a.

The preformed cavity 101a is shown in FIG.
Is a cavity for preliminarily forming the hook-shaped engaging element 3 before forming the hook-shaped engaging element 3. The hook-shaped engaging element 3 is connected to the preformed preformed hook 3 ′ in the next step. It is completed by forming the engaging head 3b having the form shown in FIG. 1 in the joint head forming step. Therefore, the shape of the preformed cavity 101a is determined by the die wheel 1
01, and a pair of columns 101a-1 linearly bent in the direction away from the axis at the tip of the column-shaped molding 101a-1. And the head forming portion 101a-2 of FIG.

Now, the die wheel 101 is driven to rotate, and at the same time, the first and second extrusion nozzles 102a, 102b
When the molten resin is extruded from the
The molten resin extruded from the first extrusion nozzle 102a is pushed into the preforming cavity 101a with a predetermined extruded resin pressure on the peripheral surface of 1 and a film-like thin film is formed on the peripheral surface. This thin film constitutes the first sheet 2a of the present invention, and the preforming cavity 101a
The preformed hook 3 'is formed by the molten resin pushed into the
Are integrally formed on the surface of the first sheet 2a.

The first integrated molding of the preformed hook 3 '
The sheet 2a is carried on the peripheral surface of the die wheel 101 and moves with the rotation of the die wheel 101. During this movement, the molten resin extruded from the second extrusion nozzle 102b is fused and integrated with the outer surface of the first sheet 2a with a predetermined extruded resin pressure, and between the first sheet 2a and the extrusion die 102. The second sheet 2b is formed while filling the formed gap, and the die wheel 1 is moved within a required rotation range.
It moves with its rotation in the state where it is carried by 01.
During this movement, the preformed article 1 'comprising the first sheet 2a and the second sheet 2b having the preformed hooks 3' laminated and integrated is cooled to such an extent that its shape is maintained. While pulling out the preformed hook 3 'formed in the molding cavity 101a, the die wheel 10 is pulled out.
1 and continuously transferred to the next step, the engaging head forming step.

FIG. 3 schematically shows the engagement head forming step. This engaging head forming step has been previously filed by the present applicant as Japanese Patent Application No. 9-223909. Therefore,
Here, the description of the same step is roughly stopped.

The preformed product 1 'formed as described above is completely cooled and solidified while being sent to the next engaging head forming step. In the engaging head forming step, as shown in FIG. 3, the engaging head portion 3 b ′ of the preformed hook 3 ′ is introduced between the preformed product transfer path 103 and the heating roller 104 rotating above the preformed product transfer path 103. By pressing on the peripheral surface of the heating roller 104, the engaging head portion 3b 'is bent deeply by pressing, and the top is substantially flattened by melting, and at the same time, bulging portions 3c are formed on the left and right. Therefore, the distance between the preformed article transfer path 103 and the heating roller 104 is set slightly smaller than the height of the preformed hook 3 '.

The preformed article transfer path 103 and the heating roller 10
After the above-mentioned engagement head 3b is formed between the first and fourth engagement heads,
The engaging head 3b is not cooled rapidly but solidified slowly at room temperature. Due to the gradual cooling at the normal temperature, the molten portion at the top of the engaging head 3b and the surrounding heated portion have higher rigidity than other portions, so that the shape of the engaging head 3b is stabilized and the bulging portion 3c is formed. Is added, the engagement force between the female surface fastener member and the loop increases. When the molding of the engaging head 3b is completed in this way, the molded product is continuously transferred to the next step of applying the adhesive substance.

FIG. 4 shows an example of a coating process when a hot-melt resin is used as the adhesive substance. The method of applying this adhesive substance is generally known, and the continuous molded product which has been molded as described above is a cotted roll 1
The surface of the adhesive layer forming surface is subjected to surface processing by corona discharge, and an adhesive substance is applied between the guide roll 106 and the backup roll 107, cooled by the chill roll 108, and then taken up by the winding roller. 109
Thus, the adhesive layer 4 is wound directly into a roll with the adhesive layer 4 inside. The male molded surface fastener member 1 having the adhesive layer 4 wound in this manner is shipped in its wound form, is appropriately unwound and cut, and is attached to a flap such as clothing or a disposable diaper. And attach it.

In the case where a solvent-based substance is used as the adhesive substance, the adhesive substance is coated on the surface on which the adhesive layer is formed instead of the above-mentioned coating step, and then the solvent is evaporated in a heated atmosphere. Thereafter, the solvent is appropriately cooled through suction means, and the solvent is collected without being discarded in the open air.

The male molded surface fastener member 1 according to this embodiment
As described above, since the first sheet 2a including the hook-shaped engaging element 3 is made of a synthetic resin material to which an appropriate amount of a release agent is added, the male member wound into the roll shape is used. When the molded surface fastener member 1 is rewound, the engaging head 3b of the hook-shaped engaging element 3 attached to the adhesive layer 4 is easily peeled off from the adhesive layer 4, so that, for example, the cohesive force is reduced at a high temperature. Thus, even when the hook-shaped engaging element 3 is not easily transferred to the adherend, it does not move to the engaging head 3b, so that the adhesive force of the adhesive layer 4 does not decrease.
There is no reduction in the engaging force with the loop of the other party, which is an essential function of the above.

FIG. 5 is a partial sectional view of a male molded surface fastener member 11 showing a second embodiment of the present invention. According to this embodiment, as is clear from the figure, in addition to the first sheet 2a and the second sheet 2b, the male molded surface fastener member 11 has a third sheet made of the fiber sheet 2c as the first sheet.
And the second sheets 2a and 2b are interposed and integrated. The fiber sheet 2c is not particularly limited as long as it is made of a woven or knitted fabric, a nonwoven fabric, or paper and has a structure in which fine voids exist between fibers.

The material of the first sheet 2a and the second sheet 2b is essentially the same as that of the above embodiment, but the two sheets 2a and 2b are formed and integrated via the fiber sheet 2c. I have. The interposition of the fiber sheet 2c improves the tear strength of the molded male surface fastener member of the present invention, and also, for example, when the affinity between the first sheet 2a and the second sheet b is low, Each sheet 2a, 2b in a molten state or a semi-molten state immediately after molding
Penetrates into the gaps between the fibers or the yarns of the fiber sheet 2c to be solidified and integrated.
a to 2c are tightly integrated in a block state, and an extremely strong laminate is obtained.

An example of the molding method is schematically shown in FIG. In this embodiment, the form of the hook-shaped engagement element 3 is the same as that of the above-described embodiment, and therefore, it is necessary to form the preform 13 'in advance as described above. Of course,
As described above, the form of the hook-shaped engaging element 3 is not limited to the embodiment. In the following description, portions that are substantially the same as those in the above embodiment are denoted by the same reference numerals.

Male molded surface fastener member 1 according to this embodiment
As in the first embodiment, the preforming apparatus 110 includes a plurality of preforming cavities 1 of a large number of hook-shaped engaging elements 3 on the peripheral surface.
A die wheel 111 having a cooling means (not shown) formed therein, and a first slit having a laterally long slit shape facing the peripheral surface of the die wheel 111 with a predetermined gap formed therebetween.
A first extrusion die 112 having an extrusion nozzle 112a and a predetermined gap between the peripheral surface of the die wheel 111 and a phase difference of about 90 ° on the downstream side in the rotation direction of the die wheel of the first nozzle 112a. A first extrusion die 113 having a horizontally long slit-shaped second extrusion nozzle 113a facing each other, and the first and second extrusion dies 112, 11
3 and a guide roller 114 for guiding and guiding the fiber sheet 2c.

That is, the present embodiment is different from the above-mentioned embodiment in that the extrusion die is composed of the first and second sets, and the guide roller 114 for introducing the fibrous sheet 2c is provided at an intermediate position between them. It is a point provided. Accordingly, the first and second extrusion nozzles 112a and 113a are connected to the respective resin flow paths 112b and 113b formed in the first and second extrusion dies 112 and 113, and are located upstream in the rotational direction of the die wheel 111. The molten resin to which the release agent is added is extruded from the first extrusion nozzle 112a provided on the side, and from the second extrusion nozzle 113a arranged with a phase difference of 90 ° downstream of the first extrusion nozzle 112a. The molten resin to which no release agent is added is extruded. The die wheel 111 is driven and rotated in one direction by a driving device (not shown) as in the above embodiment.

Now, the die wheel 111 is driven to rotate, and at the same time, each molten resin is extruded from the first and second extrusion dies 112 and 113 onto the peripheral surface of the die wheel 111 via the first extrusion nozzles 112a and 113a, respectively. At this time, the fiber sheet 2c is simultaneously guided by the guide roller 114 and introduced so as to merge between the respective molten resins.

That is, the molten resin extruded from the first extrusion nozzle 112a is extruded onto the peripheral surface of the die wheel 111 with a predetermined extruded resin pressure, a part of which is pushed into the preforming cavity 111a and another molten resin is extruded. A first sheet 2a made of a film-like resin film is formed on the peripheral surface with a resin. When the first sheet 2a is transported by approximately 45 ° with the rotation of the die wheel 111, the fiber sheet 2c is introduced there and is fused to the outer surface of the first sheet a which is still in a molten state. .

In a state where the first sheet 2a and the fiber sheet 2c are fused and further transferred by approximately 45 ° with the rotation of the die wheel 111, the second extrusion nozzle 113
a, the molten resin extruded with a predetermined resin extrusion pressure is pressed and fused to the outer surface of the fiber sheet 2c, and the second sheet 2b is integrally formed between the second extrusion die 113 and the fiber sheet 2a. You. While the second sheet 2b is being formed, the first sheet 2a and the second sheet 2
A part of the resin in the molten state of b enters into the inter-fiber space of the fiber sheet 2c.

When the sheets 2a to 2c are transported by approximately 90 ° in association with the rotation of the die wheel 111 in a state where the sheets 2a to 2c are laminated and integrated, a preformed product 13 ', which is a laminated product thereof, is formed.
Is the die wheel 111 by the pickup roll 115
Is taken off from the peripheral surface and completely cooled and solidified. The preformed product 13 'is then transferred to the above-described engaging head forming step, where it is formed into the forming head 3b having the above-described form, and then to the adhesive substance coating step where the second The adhesive layer 4 is formed on the outer surface of the sheet 2b to obtain the male molded surface fastener member 11 of the present invention. This is continuously wound directly into a roll by a winding roller 109 with the adhesive layer 4 inside.

The male molded surface fastener member 11 having the adhesive layer 4 thus wound is shipped in the same wound form as in the above-described embodiment, and the required length is appropriately unwound and cut. Attach it to a flap such as a product or disposable diaper. In the male molded surface fastener member 11 according to the present embodiment, as described above, the first sheet 2a including the hook-shaped engagement elements 3 is made of a synthetic resin material to which an appropriate amount of a release agent is added. Therefore, when rewinding the male molded surface fastener member 1 wound up in the roll shape,
The engaging head 3b of the hook-shaped engaging element 3 adhered to the adhesive layer 4 is easily peeled off from the adhesive layer 4, so that, for example, under high temperature, the viscosity increases, the cohesive force decreases, and the adhesive migrates to the adherend. Even in a state where the hook-shaped engagement element 3 is easily engaged, the hook-shaped engagement element 3 does not move to the engagement head 3b, so that the adhesive force of the adhesive layer 4 does not decrease. Is not reduced.

Further, in the present embodiment, a part of the constituent resin of the first and second sheets 2a and 2b enters the inter-fiber space of the fiber sheet 2c interposed therebetween and solidifies. Since the sheets 2a to 2c are integrated tightly and in a block state, an extremely strong laminate is obtained, and at the same time, the fiber sheet 2c has a reinforcing function of the male molded surface fastener member 11, so that the sheet-like base Even if the whole material 2 is set to be thin, required tear strength and tensile strength are secured.

In the above description, only typical examples of the present invention are given, and the present invention is not limited to the above embodiments.
It will be apparent to those skilled in the art that various changes and modifications can be easily made within the scope of the appended claims.

[Brief description of the drawings]

FIG. 1 is a sectional view partially showing the structure of a male molded surface fastener member according to a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram schematically showing an example of a preforming method of the male molded surface fastener member.

FIG. 3 is a process diagram schematically showing an example of a forming process of an engaging head of the preformed preformed product.

FIG. 4 is a process diagram schematically showing an example of a coating process of a sticky substance provided after an engaging head forming process.

FIG. 5 is a sectional view partially showing the structure of a male molded surface fastener member according to a second embodiment of the present invention.

FIG. 6 is an overall configuration diagram schematically showing an example of a preforming method of the male molded surface fastener member.

[Explanation of symbols]

 1,11 Male molded surface fastener member 1 'Preformed product 2 Sheet base material 2a First sheet 2b Second sheet 2c Fibrous sheet 3 Engagement element 3', 13 'Preformed hook 3a Column 3b Engagement head 3c bulging part 3b 'engaging head part 4 adhesive layer 100, 110 preforming device 101, 111 die wheel 101a, 111a preforming cavity 101a-1 column forming part 101a-2 head forming part 102 extrusion die 102a , 102b Extrusion nozzles 102a ', 102b' Resin flow path 103 Preformed product transfer path 104 Heating roller 105 Cotteder roll 106 Guide roll 107 Pack-up roll 108 Chilled roll 109 Winding roller 112 First extrusion die 112a First extrusion nozzle 112b Resin flow Road 113 Second extrusion die 113a Second Nozzle 113b resin flow path 114 exits the guide roller 115 pickup roller

Claims (5)

[Claims] 1. A plurality of hook-like engaging elements (3), which are engaged with and disengaged from a female fastener member having a plurality of loops on one surface of a sheet-like base material, are also provided on one surface of the sheet-like base material (2). And an adhesive layer of an adhesive substance on the back surface of the substrate (2).
(4) In the male molded surface fastener member (1) made of thermoplastic synthetic resin having (4), the constituent material constituting at least the interface with the adhesive layer (4) of the sheet-like substrate (2) is the adhesive material The hook-shaped engaging element (3) is made of a material having a low affinity for the adhesive substance constituting the adhesive layer (4). A male molded surface fastener member, characterized in that: 2. The sheet-like base material (2) comprises a first sheet (2a) molded and integrated with the hook-like engagement element (3) made of a thermoplastic synthetic resin material to which a release agent is added. , A second sheet (2b) made of a thermoplastic synthetic resin having an affinity for the adhesive substance, which is laminated and integrated on the back surface side of the first sheet (2a) with the adhesive layer (4). The male molded surface fastener member according to claim 1, comprising: 3. A third sheet (2c) made of fiber is further interposed between the first sheet (2a) and the second sheet (2b), and the first sheet (2a) and the second sheet (2b) is the third sheet (2
The male molded surface fastener member according to claim 2, wherein the male molded surface fastener member is integrated with c) by fusion. 4. A sheet-like substrate (2) and a plurality of hook-like engaging elements (3) integrally formed on one surface of the substrate (2), and a back surface of the sheet-like substrate (2). A method for manufacturing a male molded surface fastener member (1) made of a thermoplastic synthetic resin, which forms an adhesive layer (4) on a peripheral surface thereof, comprising a plurality of hook engaging element molding cavities (101a, 11
1a) driving and rotating the die wheel (101, 111) in one direction, facing the peripheral surface of the die wheel (101, 111) with a gap corresponding to the thickness of the sheet-shaped substrate (2). The first and second extrusion nozzles (102a, 112a: 102b, 113a) are displaced in the rotational direction of the die wheel (101, 111), and are introduced into the first extrusion nozzles (102a, 112a). Adding a release agent to the synthetic resin raw material to reduce the peel adhesive strength to the adhesive layer, and extruding the molten resin to which the release agent is added from the first extrusion nozzles (102a, 112a). And extruding a molten resin having an affinity for the viscous substance from the second extrusion nozzles (102b, 113a). 5. A molten resin extruded from the first extrusion nozzle (102a, 112a) and the second extrusion nozzle (102b, 113a).
Fiber sheet material (2c) between the molten resin extruded from
5. The method of manufacturing a male molded surface fastener according to claim 4, comprising introducing: