JP2566609B2 - Method for manufacturing surface fastener member - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a surface fastener having high functionality, and is extremely useful as a method for producing a male or female surface fastener. .

(Prior Art) Conventionally, surface fasteners mainly use woven tapes, but they have drawbacks of low productivity and high cost. In recent years, continuous extrusion molding methods (for example, Japanese Patent Publication No. 53-228
Mushroom-shaped or hook-shaped projections (engaging elements, hereinafter referred to as ribs) by resin molding using the No. 89, Japanese Patent Publication No. 51-19386, etc.) or continuous injection molding method (Japanese Patent Publication No. 48-22768, etc.) There has been proposed a method for producing a sheet for surface fasteners having a.

(Problem to be Solved by the Invention) In the former continuous extrusion molding method, since the engaging element is formed by making a notch spaced apart in the longitudinal direction in the forming strip having the longitudinal rib, The shape becomes a two-dimensional shape. Therefore, it is difficult to obtain a rib shape having a high engaging function, and the unevenness of the shape accuracy of the engaging element increases due to the cutting process or the stretching process.

On the other hand, the latter continuous injection molding method is required to be easily released from the molding die (peelability). Therefore, a die having a large engaging force and a large shape of the head of the engaging element is unsuitable, and the material of the resin used is limited.

A first object of the present invention is to provide a method for manufacturing a surface fastener member by a molding method which is highly functional and has high productivity and low cost.

Another object of the present invention is to provide a method of manufacturing a surface fastener member by a molding method, which is capable of having an engagement element having a desired three-dimensional shape. And other objects of the present invention will become apparent from the following description.

(Means for Solving the Problems) The above object is to provide a single strip in which a rib group having a rib head having a horizontal cross section expanded from the horizontal cross section of a rib strut provided on at least one substrate surface is arranged. Is used as a material for the surface fastener, and two or more of the same or different single strips are arranged in the longitudinal direction of the strip, and adjacent base parts are joined or joined to each other and integrated to form a multi-row of the rib group. This is achieved by a method of manufacturing a surface fastener member, which is characterized by a large number of engaging elements.
In the present invention, the single strip means a belt-shaped article having a plurality of rows of ribs which do not substantially have a surface fastener function as a surface fastener member by itself.

According to the present invention, in conventional injection molding and extrusion molding, it is possible to solve the problem that it is difficult to mold a surface fastener having an engaging element with a highly functional shape, and to improve the shape, arrangement, and hardness of the engaging elements. It is possible to compositely combine different materials.

The present invention will be described in more detail below with reference to the drawings. First, FIGS. 2 to 4 are perspective views showing an example of a single strip which is one element used in the present invention.
In the figure, 1 is a base material portion, 2 is a rib support portion, and 3 is a rib head portion. The single strip 5 has a rib head 3 and a rib support 2
A plurality of ribs 4 arranged in a substantially single row
And the base material part 1. The rib 4 is shown in FIGS.
As shown in the longitudinal sectional view and the lateral sectional view, respectively, the rib column 2 is configured to have a rib head having a horizontal section which is expanded. The single strip having the ribs is, for example, shown in FIGS. 7 and 8 in a longitudinal sectional view showing a main structure portion of the mold 10 as a model, and a strip forming space of the mold element 11 of the mold. As shown in the perspective view from the inner surface, the extremely simple mold structure enables the molding of single strips with good mold separation. Also in press molding, a good single strip can be easily formed.

Here, the mold 10 has a structure in which the mold is divided into 11 and 12, so that the molded product can be separated from the mold even if the rib shape, the base material shape and the like have a three-dimensional shape. It has excellent characteristics. Therefore, when the rib head 3 has various shapes as shown in FIG. 3, or as shown in FIGS. 3 and 4, the base material portion 1 has an uneven shape or a round cross-sectional shape. It is easy to obtain a single strip having By changing or combining the shapes of the strips in various ways, it becomes possible to improve the function of the fastener and to improve the bondability or adhesiveness of the substrate during the fastener composite processing.

The example of the arrangement of the engaging elements is often a straight line of equal pitches as shown in FIG. 9, but it is made to meander as shown in FIG. 10, and the arrangement pitches P ₁ , P ₂ , P ₃ ...・ You can change regularly. By regularly arranging the ribs,
As will be described later, when the single strips are joined or joined together, the rib groups can be arranged in multiple rows on a large number of base materials, and a surface fastener member can be formed.

In the single strip of the present invention, it is basically preferable that the rib row is a single row because of the problem of mold separation. However, if a die as shown in FIG. 11 is used, for example, a single strip having two rib rows can be relatively easily formed. That is, in FIG. 11, the mold 10 is composed of mold elements consisting of 11, 12 and 13. After the cavities 6 and 6'are filled with resin and solidified, the mold elements 11 and
Split 13 left and right. The removal of the intermediate mold element 12 is then very easy, especially if the resin to be filled is an elastic material, and even easier if it is carried out at a certain temperature after solidification.

The material forming the above-mentioned single strip is arbitrary. Thermoplastic or thermosetting resins such as polypropylene, polyamide, polyethylene, polyvinyl chloride, polyethylene terephthalate, acrylic resin, polyester, polystyrene, epoxy resin, polycarbonate, polyurethane, various elastomers and rubbers are preferably used.
These resins may be used alone or in combination,
Various additives and reinforcing fillers can also be blended. The single strip may be a crystallized or stretched one.

Next, a method for manufacturing a surface fastener member from a single strip, which is the most characteristic feature of the present invention, will be described.

1 and 13 are a perspective view and a vertical sectional view of a surface fastener member obtained by the present invention. Each single strip
5A, 5B, 5C and 5D are arranged in the longitudinal direction, and are joined or bonded to each other at the ends of the adjacent base material portions. The method of joining or bonding may be any method such as adhesion with an adhesive or an adhesive resin, heat fusion, laser, fusion with high frequency or ultrasonic waves, stitching, and embedding. If necessary, a separate joining member 8 may be interposed between single strips as shown in FIG. 14, or a common joining member 9 such as a base sheet, cloth, or net may be interposed as shown in FIG. You may make it. It may be embedded in the common joint member 9 as shown in FIG.

In the example of the present invention, the shapes of the adjacent single strips can be changed as shown in FIG. 17 or FIG.

In the present invention, the arrangement of the single strips is arbitrary such as isotropic arrangement (FIG. 19) and staggered arrangement (FIG. 20).
Further, the rib shape of the adjacent strips can be arbitrarily changed (FIG. 21 or FIG. 22).

(Embodiment) FIG. 23 shows a partial side view of an example of a single strip combined and integrated manufacturing apparatus. A large number of at least two single strips 5 are supplied from above. The hot-melt adhesive tape 7 and the common base tape 9 having a desired width are supplied from below. The whole is integrated by being pressed by the heating and compression roll 20 heated to a temperature above the melting point of the adhesive tape. Thus, a surface fastener member whose cross section is shown in FIG. 15 is obtained.

(Effect of the present invention) According to the method for producing a surface fastener by the molding strip of the present invention, it is possible to produce a surface fastener having an engaging element having an extremely high engaging property, and a resin which is difficult to be extruded or stretched. It is possible to manufacture a surface fastener that can be applied to a wide range of uses by combining various different types.

[Brief description of drawings]

FIG. 1 is a perspective view of a surface fastener member obtained by the present invention,
2 to 4 are perspective views of a single strip which is one element used in the present invention, and FIGS. 5 and 6 are longitudinal sectional views and transverse sectional views of the single strip shown in FIG. 2, respectively. 7 and 8 are a longitudinal sectional main structural view of a mold for making the single strip shown in FIG. 2 and an external view of a split mold flow path. 9 and 10 are plan views of a single strip showing an arrangement example of engaging elements, and FIG. 11 is a longitudinal sectional view of a mold for making a single strip having a second row of ribs, FIG. 12 is a vertical cross-sectional view of a mold for making a surface fastener member having multiple rows of ribs, and FIGS. 13 to 18 are vertical cross-sectional views of the surface fastener member showing the joining or joining state of a single strip, 19 to 22 are plan views showing an example of arrangement of single strips, and FIG. 23 is a partial side view of an example of a manufacturing apparatus. 1: Base material part, 2: Rib support part 3: Rib head part, 4: Rib 5: Single strip, 6: Cavity, 7: Adhesive 8: Coupling member, 9: Common joining member 10: Mold, 11 , 12,13: Mold element

Claims (3)

(57) [Claims] 1. A single strip having at least one rib strut provided on one surface of a base material and a rib group having a rib head having a horizontal cross-sectional area expanded from the horizontal cross-sectional area of the rib strut is arranged. As a material for the surface fastener, two or more of the same or different single strips are arranged in the longitudinal direction of the strip, and adjacent base portions are joined or joined to each other to form a plurality of rib groups. A method for manufacturing a surface fastener member, comprising a plurality of engaging elements. 2. The method for manufacturing a surface fastener member according to claim 1, wherein at least two single strips are continuously supplied and are continuously joined or bonded to be integrated. 3. The method of manufacturing a surface fastener member according to claim 1, wherein the single strips are joined together via at least one other common member.