JPH0937814A - Male type hook-and-loop fastener and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process for producing a male type hook-and-loop fastener capable of preventing the dislodgment of a stem. SOLUTION: Plural pieces of thermoplastic monofilaments of <=150d to be formed as stem parts 3 are bundled and are driven into a base material 2 of a foamed resin sheet by using a tufting machine. The non-base material side front ends of loops are then melted by heating without cutting the loops formed by the monofilaments driven into the same holes, by which the front ends of two pieces of the continuous stems are fused to form integrated and enlarged parts.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention has an appropriate engaging force and can be suitably used in a place where cushioning property is required.
In addition, the present invention relates to a male surface fastener in which the stem portion does not drop off from the base material and a method for manufacturing the same.

[0002]

2. Description of the Related Art Heretofore, there have been known some methods for producing a male type surface fastener called a mushroom type or a mushroom type. For example,
There is a method of molding a resin (injection molding method).

Further, a method of weaving a thermoplastic resin monofilament into two base materials by a binding double weave method, cutting the monofilament between the base materials, and then heating and melting the tip of the monofilament to enlarge it (Actual Kaihei 04 -019
No. 888) or a method of connecting base fabrics with a thermoplastic resin monofilament using a double Russell knitting machine, cutting the monofilament at the connecting portion, and heating and melting the cut portion to enlarge (Japanese Patent Laid-Open No. 04-338402). (See) is known.

However, hitherto, there has not been found a method for producing a male surface fastener which can be suitably used in a portion requiring cushioning properties. In view of such circumstances, the applicant, as a result of earnest research, found that the problem can be solved by driving a stem material into a foam resin sheet having a certain thickness as a base material using a tufting machine, The invention completed thereby has already been filed (Japanese Patent Application No. 7-154612).

According to the invention of Japanese Patent Application No. 7-154612, a tufting machine is used to bundle a plurality of thermoplastic flat yarns serving as stems one by one or as a base material for a foam resin sheet. A method for producing a male surface fastener comprising driving, and then heating and melting the non-base material side tip of the driven flat yarn, and a base material for a foam resin sheet having a thickness of 2 mm to 20 mm,
And a male surface fastener comprising a stem portion of a thermoplastic flat yarn, which is struck in a substantially upright state by bundling one or more ones on the base material, and the end of the stem portion on the non-base material side is enlarged. It is provided.

[0006] The applicant continued his research to obtain a surface fastener in which the stem portion is less likely to come off from the base material than the surface fastener of Japanese Patent Application No. 7-154612.

[0007]

The present invention has been completed as a result of such research, and instead of the flat yarn,
It is based on the finding that the purpose can be achieved by driving a plurality of bundled monofilaments into a substrate.

That is, according to the present invention, a tufting machine is used to bundle a plurality of thermoplastic monofilaments having a diameter of 150 d or less, which are to be the stem portion, into a base of a foam resin sheet, and then into the same hole. The non-base material side end portion of the loop is heated and melted without cutting the loop formed by the monofilament to form an enlarged portion in which the end portions of two continuous stems are fused and integrated. The present invention provides a method for producing a male surface fastener.

Further, the present invention comprises a base material of a foam resin sheet having a thickness of 2 mm to 20 mm, and a stem portion of a thermoplastic monofilament having a length of 150 d or less, which is bundled into a plurality of base materials and is driven upright. It is intended to provide a male surface fastener in which two continuous non-base-material-side tips of the stem portions driven into the same hole are integrated and enlarged.

Further, the present invention provides a foam material with a surface fastener in which such a male surface fastener is integrated with a foam resin surface.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A male surface fastener of the present invention and a method for manufacturing the same will be described below with reference to the drawings.

FIG. 1 is a schematic view schematically showing a specific example of the male surface fastener of the present invention. FIG. 2 is a schematic view schematically showing the stem material being driven into the base material. FIG. 3 is a schematic view in which the stem portion is partially enlarged.

Referring to FIG. 1, a male surface fastener (1) of the present invention comprises a base material (2) and a stem portion (3) driven into the base material (FIG. The embodiment in which the laminated reinforcing material layer (4) is provided on one surface on the stem side is shown).

First, the substrate (2) will be described. The base material is a foam resin sheet such as polyurethane foam, polyethylene foam, polystyrene polystyrene, polypropylene polypropylene, or polyester foam. By using such a foam resin sheet as a base material, a surface fastener that can be suitably used in a place where cushioning properties are required can be obtained.

The thickness of the substrate (2) is 2 mm to 20 mm. By thickening the base material in this manner, cushioning properties are imparted to the surface fastener itself, and the stem portion (3) described later can be driven in a substantially upright state. Here, “substantially upright” means that the stem portion extending from the stem surface (5) may be inclined up to about 30 ° from the vertical direction.

Next, the stem portion driven into the substrate is made of monofilament. This monofilament is 150
A thickness of d or less is used. With this thickness, the adhesion of the stem connecting portion (7) between adjacent stems to the base material on the non-stem surface (6) side becomes good. In addition, the stem part driven into one place (one hole) has 4 to 10
This is a book (the number of monofilaments at the stage of driving with a tufting machine is 2 to 5 as will be described later).

The tip portion (8) of the stem portion is enlarged. The flat yarn must be thermoplastic as it must be heated and melted for enlargement. Examples of such materials include polypropylene, polyethylene, PET and nylon.

The enlarged tip portion is formed by integrating the tip portions of two stem portions. A partially enlarged version of this is shown in FIG.

The implantation density is 1 to 15 per square inch.
There are 0 places. If the driving density is too high and the density is too high, the foam base material is seriously damaged and disadvantageous. On the other hand,
If the driving density becomes sparse below the range, the desired engagement cannot be achieved. In addition, as described above, 2 to 5 pieces are driven into one place in terms of stem conversion.

In order to prevent the stem from breaking through the foamed resin sheet base material and coming off, both sides of the base material or the surface on the non-stem side are laminated and reinforced with a non-woven fabric, a woven fabric or a knitted fabric. You can also

Further, in order to prevent the stem from coming off from the base material, the non-stem surface of the base material may be coated with a synthetic resin such as urethane type or acrylic type.

The male surface fastener of the present invention is manufactured as follows.

First, if necessary, both surfaces of the base material or the surface on the non-stem surface side are laminated and reinforced with a non-woven fabric, a woven fabric or a knit fabric in advance.

Next, a monofilament serving as a stem portion is driven into the base material which is laminated or not reinforced. A tufting machine is used for driving. Although such a tufting machine has been conventionally used for manufacturing artificial grass and tufted carpet, it can be preferably used for driving the stem portion of a surface fastener into a base material. The driven state is schematically shown in FIG.

After the driving, the non-base side end of the loop (9) formed by the monofilament is heated at 400 to 700 ° C. without cutting. By heating, the tip portion is melted and enlarged, and the tips of the two stems derived from the same monofilament are integrated. The surface fastener of Japanese Patent Application No. 7-154612 is different from the present invention in that the enlarged tip portions of the stems are independent of each other.

If desired, the non-stem surface may be coated with a synthetic resin solution such as urethane or acrylic before or after heating.

The method of manufacturing the male surface fastener with the foam layer of the present invention is suitable for mass production, and the cost can be greatly reduced.

The male surface fastener of the present invention thus obtained can be used in combination with the female surface of the taffeta tuft, the female surface of the pile type, and the female surface such as a raised cloth.

In addition, the male surface fastener of the present invention can be attached to or integrated with the surface of the foam molded product by adhesion, welding, or the like.
For example, when molding a polyurethane foam, a male surface fastener is placed at the bottom of the mold with the stem surface (engaging surface) as the lower surface, liquid urethane is poured onto it, and the surface fastener is molded while foaming. It is possible to obtain a foam material with

Such a foam material with a hook-and-loop fastener is also within the scope of the present invention, and can be suitably used for applications requiring cushioning properties such as automobile seats and household seats.

[0031]

EXAMPLES The present invention will be described in more detail with reference to Comparative Examples and Examples below. Comparative Example 1 (Manufacturing Method of Japanese Patent Application No. 7-154612) A urethane foam sheet having a thickness of 10 mm as a base material was laminated on one surface with 25 g of Ny spunbonded nonwoven fabric by a frame laminating method. Using a tufting machine generally used for artificial turf so that the non-woven fabric laminated surface of this substrate becomes a non-stem surface, three 100 denier polypropylene flat yarns were bundled and driven. Driving density is 150 / inch ² (3 x 5
It was 0 places). The length of the polypropylene flat yarn on the base material was adjusted to 4.0 mm by cutting.

Then, the tip portion is heated and melted at a temperature of about 500 ° C. to give a mushroom shape, and then the non-stem surface is back-coated with a solvent-based polyurethane resin to obtain a male surface fastener for comparison. It was

When the engagement force with a normal pile type female surface was measured, it was 500 g / 2.5 cm width. Further, the pull-out strength of the stem portion was measured by Tensilon to be 240 g / piece. Example 1 A urethane foam sheet having a thickness of 10 mm as a base material was laminated on one surface with 25 g of Ny spunbonded nonwoven fabric by a frame laminating method. Using a tufting machine generally used for artificial turf so that the non-woven fabric laminated surface of this substrate becomes a non-stem surface, 100 denier polypropylene monofilaments were bundled and hammered into each one. The implantation density is 15
The number was 0 / inch ² (3 × 50 places). The polypropylene monofilament was not cut and was looped so that the length on the substrate was adjusted to 4.0 mm.

Next, the non-base material side end of the loop is heated and melted at a temperature of about 500 ° C., two continuous stem portions are connected and enlarged, and then the non-stem surface is backed with a solvent-based polyurethane resin. Coating was performed to obtain the male surface fastener of the present invention.

When the engaging force with a normal pile type female surface was measured, it was 320 g / 2.5 cm width. The pull-out strength of the stem portion was measured by Tensilon to be 370 g / line. Further, after the normal pile-type female surface was engaged with it, when it was forcibly peeled from the female surface again, the stem tip was connected, so that the stem did not fall off from the base material.

Example 2 The male surface fastener obtained in Example 1 was placed on the bottom of the mold with the engaging surface on the lower side, and liquid urethane was poured onto it and molded while foaming to give a surface fastener. The foam material with a surface fastener of the present invention integrated with the urethane foam surface was obtained. When the engaging force of this hook-and-loop fastener portion with a normal pile type female surface was measured, it was 350 g / 2.5 cm width.

[0037]

According to the present invention, there is provided a male surface fastener having a proper engaging force, which can be suitably used in a place where a cushioning property is required, and a stem is less likely to come off, and a manufacturing method thereof.

[Brief description of drawings]

FIG. 1 is a schematic view schematically showing a specific example of the male surface fastener of the present invention.

FIG. 2 is a schematic view schematically showing a stem material being driven into a base material.

FIG. 3 is a partially enlarged schematic view of a stem portion.

[Explanation of symbols]

1: Male surface fastener, 2: Base material, 3: Stem portion, 4:
Laminate reinforcing material layer, 5: stem surface, 6: non-stem surface,
7: stem connection part, 8: stem end, 9: loop formed by monofilament

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoji Ohashi, 270, Taga, Inagae-gun, Taga-machi, Shiga Daikan Co., Ltd. Shiga factory

Claims (7)

[Claims] 1. A tufting machine is used to bundle a plurality of thermoplastic monofilaments having a diameter of 150 d or less to be a stem portion and drive them into a base material of a foam resin sheet, and then form the monofilament driven into the same hole. A male surface, characterized in that, without cutting the formed loop, the non-base material side end portion of the loop is heated and melted to form an enlarged portion in which the end portions of two continuous stems are fused and integrated. How to make fasteners. 2. The production method according to claim 1, wherein both sides of the base material or one side which is a non-stem side is preliminarily laminated and reinforced with a non-woven fabric, a woven fabric or a knitted fabric, and then punching is performed. 3. The method according to claim 1, wherein the non-stem surface is coated with a synthetic resin after the driving. 4. A foamed resin sheet base material having a thickness of 2 mm to 20 mm, and a stem portion of a thermoplastic monofilament having a length of 150 d or less which is bundled into the base material and driven substantially upright and driven into the same hole. A male surface fastener in which two continuous non-base material side tips of the stem portion are integrated and enlarged. 5. The male surface fastener according to claim 4, wherein both surfaces of the base material or one surface on the non-stem surface side are laminated and reinforced with a non-woven fabric, a woven fabric or a knitted fabric. 6. The male surface fastener according to claim 4, wherein the non-stem surface of the surface fastener is coated with a synthetic resin. 7. A foam material with a male surface fastener, which is obtained by integrating the male surface fastener according to claim 4 on a foam resin surface.