JPH04109904A - Face fastener member for molding - Google Patents

Abstract

PURPOSE:To obtain excellent mold-following ability to a molding metal mold and to prevent intrusion of a foaming material into a group of engaging elements by covering the group of engaging elements with a film-like material, placing a soft magnetic tape thereon, covering the upper face thereof with a sheet-like material, and connecting both sides thereof to a film-like material. CONSTITUTION:A group of engaging elements 8 of a face fastener 2 are covered with a film-like material 3, a circumference thereof is connected to a base member, a soft magnetic tape 5 is placed thereon, and further the upper face thereof is covered with a sheet-like material 4, which is connected to the film- like material 3 at both side end portions. A molded face fastener 2 is cut at a length of 350mm, and a face of the group of engaging elements 8 is covered with a biaxial oriented polypropylene film, which is connected to a circumferential portion of a face fastener base material with a rubber pressure sensitive adhesive. Next, a steel tape of 350mm length and 12mm width is placed on a covering film of the face fastener 2, further the upper face thereof is covered with a polyester fill and both sides thereof are fixed to the polypropylene film with a rubber pressure sensitive adhesive, and both ends are left disconnected.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a hook-and-loop fastener member for molding that has good ability to be attached to a molding die and is highly effective in preventing foamed molding material from entering a group of engaging elements.

[Conventional technology]

Recently, hook-and-loop fasteners have begun to be used to join skin materials for automatic base sheets. Hook and loop fasteners used to join the skin materials of sheets are usually integrally molded during foam molding of sheets and the like. Such a hook-and-loop fastener is called a molded hook-and-loop fastener member, and a thin metal sheet is placed on the top surface of the hook-and-loop fastener's engagement element group, and the entire engagement element group is covered with a film through the metal sheet. A film is used in which the film is fixed to the entire periphery of the surface 7 asner base material. Examples of the above-mentioned surface fastener member for molding include JP-A-60-179003 and JP-A-61-41.
This method has been proposed in Japanese Patent No. 405, Japanese Patent Application Laid-open No. 1-163019, etc.

[Problem to be solved by the invention]

A molded hook-and-loop fastener member is a foamed molded product in which a metal sheet is placed on the top surface of a conventional engagement element group, the metal sheet is covered with a film, and the film and metal sheet are fixed to a hook-and-loop fastener base material. Although it is effective in preventing the foamed molding material from entering the engaging element group during manufacturing, the difference in thermal expansion and contraction between the metal sheet and the hook-and-loop fastener caused by the heat during molding causes the hook-and-loop fastener to break away from the mold. Misaligned or
Dislodgement: A foamed molded product with a good attachment condition cannot be obtained, or a gap is formed between the mold and the hook-and-loop fastener member, and the foamed molding material enters the gap and sticks to the surface of the molded product. Problems such as wavy surface fasteners have been pointed out. Particularly when attaching a long hook-and-loop member to a mold or a mold with a curved surface, it is difficult to attach the hook-and-loop member accurately without slipping or coming off the mold. It is extremely difficult. In addition, in order to solve the above problem, if both ends of the metal sheet and the hook-and-loop fastener or film are not fixed, the attachment state to the mold is good, but the foamed molding material flows from the ends to the engagement element group. Intrudes into the surface and obstructs the engagement function of the surface 7 asener. Therefore, an object of the present invention is to provide easy attachment to a mold;
A hook-and-loop fastener for molding that has good mold adhesion properties during thermoforming, prevents foam molding material from entering the engaging element group, and provides a foam molded article with the hook-and-loop fastener attached in good condition. To provide parts.

[Means to solve the problem]

The present invention covers an engaging element group on one surface of a base material and an engaging element group of a hook-and-loop fastener having an embedded element group for embedding in a molded body on the other surface with a film-like material. The edge is joined to at least a part of the base material, and a soft magnetic tape is further placed on the upper surface of the film-like material, and the upper surface is covered with a sheet-like material, and both sides of the sheet-like material are covered with the film-like material. This is a surface fastener member for molding, characterized in that it is joined. The hook-and-loop fastener used in the molded hook-and-loop fastener member of the present invention is made of fibers selected from polyester fibers, polyamide fibers, polyolefin fibers, polyvinyl chloride fibers, acrylic fibers, polyurethane fibers, regenerated cellulose fibers, etc. Woven hook-and-loop fasteners, or polyester, polyamide, polyolefin, plasticized polyvinyl chloride, polyurethane, polyolefin elastomer, polyester elastomer, polyamide elastomer, polyisoprene, and other melt-formable elastic polymers or melt-formable elastic polymers. This is a molded surface fastener obtained by molding a synthetic resin such as a resin composition containing. These hook-and-loop fasteners are provided with a group of engaging elements having an engaging function on one side and a group of embedding elements for embedding in the molded body on the other side. The shape of this embedded element is a loop, a hook, or a fluff-like shape in the case of a knitted and woven surface fastener, and a bulge-head shape, a rod-like shape, an uneven shape, a rough surface, or the like in a molded surface fastener. Further, the film-like material covering the upper surface of the engagement element group of the surface 7 asener can protect the inside of the engagement element group at least until the cast foam molding material loses its fluidity.
There are no particular limitations on the material or structure, but examples include polyolefins such as polyethylene and polypropylene, flexible vinyl chloride resins, polyamides, polyesters, polyvinyl alcohol resins, fluorine resins, film materials such as silicone resins, cellophane, and paper. , non-woven fabric, or metal foil such as aluminum foil, etc., or a non-porous or microporous film-like material such as a composite structure of two or more types. Furthermore, the material and structure of the sheet-like material covering the upper surface of the soft magnetic tape is not particularly limited as long as the soft magnetic tape is held or pressed onto the engagement element group, and may be made of, for example, polyethylene, Polyolefins such as polypropylene, soft vinyl chloride resins, polyamides,
Selected from film materials such as polyester, polyvinyl alcohol resin, 7-carbon resin, V-Y-S resin, cellophane, paper, non-woven fabric, knitted fabric, coarsely textured woven fabric, net-like material, etc. It is a non-porous or porous sheet-like material such as one type or a composite structure. The film-like material and the base material of the surface 7 asner, or the film-like material and the sheet-like material are bonded using, for example, chloroprene rubber, nitrile rubber, butyl rubber, acrylic resin, urethane resin, silicone resin, etc. Adhesives for elastomer resins, vinyl acetate resins, epoxy resins,
Bonding is performed using an adhesive selected from true melt adhesives, pressure sensitive adhesives, etc., an ultrasonic method, a high frequency method, a heat fusion method, and other conventional means. The film-like material and the hook-and-loop fastener base material may be bonded together by bonding the entire peripheral edge, but may also be partially bonded as long as the intrusion of the foamed molding material can be prevented. In addition, the /-tab-like object and the film-like object covered with the soft magnetic tape are joined at both side edges, and at least one end in the longitudinal direction prevents deformation during thermal expansion or bending deformation of the soft magnetic tape. It is important to leave them unbonded in order to ensure free sliding properties. Further, the soft magnetic tape may be partially adhered to a film or sheet material with an adhesive or the like to the extent that deformation during thermal expansion or bending deformation of the soft magnetic tape is not hindered. The soft magnetic tape used here is a magnetic material, a tape coated with a magnetic material, or a magnetic or magnetic metal tape, and preferably a soft magnetic steel tape is used. Although the shape of this soft magnetic tape is not particularly limited, an elongated one is usually used. The method for manufacturing a molded object with integrally molded hook and loop fasteners is to attach the hook and loop fastener member for molding to a molding die in a predetermined position, fix it with a magnet, and then preheat the entire mold to the desired temperature. After that, a foaming resin composition, for example, a polyurethane composition liquid or a rubber resin composition containing a foaming agent, filler, lubricant, stabilizer, etc., is injected into the mold and foam molding is performed. Thereafter, the mold is cooled and the molded product is taken out, thereby obtaining a foamed molded product equipped with a hook-and-loop fastener. Next, one embodiment of the molded hook-and-loop fastener of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a hook-and-loop fastener member for molding of the present invention, FIG. 2 is a longitudinal cross-sectional view of one embodiment of the hook-and-loop fastener member for molding, and FIG. 3 is a cross-sectional view of another embodiment of the hook-and-loop fastener member for molding of the present invention. FIG. 3 is a longitudinal cross-sectional view of the embodiment. The hook-and-loop fastener member l for molding of the present invention is a hook-and-loop fastener 2 that has a group of engagement elements 8 having an engagement function on one side of a base material and a group of embedded elements 9 embedded in a molded body on the other side. The upper surface of the mating element group is covered with a film-like material 3, and its periphery is bonded 6 to the base material of the hook-and-loop fastener 2 to prevent the foamed molding material from entering into the engaging element group. Then, a soft magnetic tape 5 is placed on the top surface of the film-like material, and the top is further covered with a sheet-like material 4, which is bonded to the film-like material 3 at both side edges 7, and both ends in the longitudinal direction are not bonded. The end portion 10 preferably has a structure with a gap in which the soft magnetic tape 5 can easily slide.

[Function 1] The present invention covers a group of engaging elements of a hook-and-loop fastener with a film-like material, its peripheral edge is joined to a base material, a soft magnetic tape is placed on the top surface of the film-like material, and the top surface is further covered with a sheet-like material. By covering the sheet-like material with a material and joining the sheet-like material and the film-like material at both side edges, it is possible to improve the fixation of the sheet-like material to the molding die. [Example] Next, an example of the molded hook-and-loop fastener member of the present invention will be described. Example 1 6- Nylon resin is melt-molded and processed to provide seven rows of engagement elements with strut heads each having an umbrella-like swollen cross-sectional shape on one side of the base material, spaced at 2-inch intervals. The other surface of the base material has a group of embedded elements each having seven rows of embedded elements each having an umbrella-like swollen cross-sectional shape at an interval of 3 mm on the other surface of the base material. A molded surface 7 asnar of 30III+1 was made. This molded hook-and-loop fastener was cut into a length of 350 mm, the surface of the engaging element group was covered with a biaxially stretched polypropylene film, and the film was bonded to the peripheral edge of the hook-and-loop fastener base material using a rubber adhesive. Next, a steel tape with a length of 350 mm and Ii 12a+m was placed on the cover film of the hook-and-loop fastener, and the top was further covered with a polyester film, and both sides were fixed to the polypropylene film with a rubber adhesive. A molded hook-and-loop fastener member CI) as shown in the schematic diagrams of FIGS. 1 and 2 was obtained in the bonded state. For comparison, both ends of the steel tape and polyester film of the molded hook-and-loop fastener member CI) of Example 1 were fixed to the polypropylene film with a rubber adhesive, and the molded hook-and-loop fastener member was fixed with the steel tape. (II) was created. Next, each molded hook-and-loop fastener member was attached to a molding die as shown in Fig. 1, and after preheating the mold temperature to 100°C, a resin composition mainly composed of polyurethane and foaming were applied. A foam material composition containing a lubricant, a lubricant, a stabilizer, etc. was injected and foam molded at 100°C to form a cushion body for an automatic military seat. Then, the film covering the engaging element group was peeled off from the hook-and-loop fastener member of the cushion body, and the state of attachment of the hook-and-loop fastener was examined. As a result, for each of the 10 test specimens, one member of the surface 7 fastener of the example was correctly attached to the cushion body, but the surface fastener member of the comparative example was attached to the cushion body correctly, although there were differences in degree among all the cushion bodies. It may also be worn distorted,
Some of them were about to come off.

【Effect of the invention】

The hook-and-loop fastener member for molding of the present invention is easy to attach to the mold, has good mold adhesion during aging molding, and does not cause waving or displacement during molding, so it can be used for foam molding with good hook-and-loop fastener attachment. You can get a body. Furthermore, since the foamed molding material does not enter into the engagement element group, the product can be obtained without impairing the engagement function.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a hook-and-loop fastener member for molding of the present invention, FIG. 2 is a longitudinal cross-sectional view of one embodiment of the hook-and-loop fastener member for molding, and FIG. 3 is a cross-sectional view of another embodiment of the hook-and-loop fastener member for molding of the present invention. FIG. 3 is a longitudinal cross-sectional view of the embodiment. 1... Hook-and-loop fastener member for molding, 2... Hook-and-loop fastener 3... Film-like material, 4... Sheet-like material, 5... Soft magnetic tape, 6... Joint portion,
7... Side edge joint portion, 8... Engagement element, 9
...Embedded element, IO...non-bonded end.

Claims (1)

[Claims] The engaging element group of a hook-and-loop fastener having an engaging element group on one side of the base material and an embedded element group for embedding in the molded body on the other side is covered with a film-like material, and the periphery of the engaging element group is covered with a film-like material. A soft magnetic tape is further placed on the upper surface of the film-like material, the upper surface is covered with a sheet-like material, and both sides of the sheet-like material are joined to the film-like material. A hook-and-loop fastener member for molding.