JPS6382601A - Fastener material - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a one-touch fastener material such as a hook-and-loop type that is configured to be attached to other objects such as polyurethane foam. It consists of a backing strip that is embedded in the surface of the foam, etc. and has an outer surface that faces the foam material during molding, and a fastener strip that has an outer surface whose half part is a fastening part such as a hook-and-loop fastener, The backing strip and the fastener strip are pasted together with the inner surfaces facing each other and the outer surface facing outward, and the backing strip is stacked over a mold longitudinal groove so that the fastener strip is aligned with the mold groove. (a) the width of the backing strip is wider than the width of the fastener strip, and (b) the inner side of the backing strip extends the same amount from each side of the outer surface of the fastener strip. (c) the fastener strip is disposed on the backing strip so that the fastener strip is attached to the exposed portion along adjacent edges of the fastener strip, and forming two breakaway gasket strips on opposite sides of the fastener material by disposing a pair of polyethylene membrane strips along the exposed portion to extend between an outer edge and an outer edge of the backing strip; and (d) prior to pouring the foam-forming liquid into the mold, the gasket strip is inserted into the first . By forming a pair of gaskets and molding the fastener strip along the line of contact with the groove side wall to form a second pair of gaskets, the foam forming liquid enters the mold groove and seals the fastener. This invention relates to a fastener material that prevents contamination of the outer surface of the strip.

PRIOR ART AND PROBLEMS THEREOF For example, hook-and-loop fasteners, commercially available under the trademark Velcro, are widely used in a variety of fields; , and a fastening part formed on the back side thereof, the first side is made of an elastic hook, and the other side is made of short pile loop fabric.

When the two fastening surfaces are pressed together, the hook releasably engages the loop to releasably hold both wire ties together. Also,
Separation can be accomplished by straightening the hook and pulling both members with sufficient force to disengage the loop.

Typically, the flexible backing material is attached to the surfaces to be joined by adhesive ultrasonic welding or stitch welding.

Hook and loop fasteners are particularly suitable for removably attaching coverings to plastic foam cushions, such as on cars and aircraft.

Attachment of the strips to the cover fabric can be easily accomplished using the conventional methods described above, such as five-stitch welding. On the other hand, in order to attach the mating strip to the plastic foam, it is embedded into the surface of the plastic foam during molding.

FIG. 1 shows its completed state. A hook-and-loop fastener (12) is attached to the negative part of the fabric (10). Generally, the loop portion is designed so that it will not get caught on other laundry even if the fabric (10) is removed and washed in a washing machine. The foam cushion (14) has hook-and-loop material (16) (hook part) embedded in its surface as shown. For an example, see U.S. Pat.
See No. 470,857.

The molding method according to the prior art and its problems are shown in FIGS. 2 to 5.6 As shown in FIG. After forming the foam forming liquid (24) into the cavity (26), the groove (20) is filled with foam forming liquid (24).
and coating the bottom of the mold including the strip (22). next,
A foaming liquid (24) is foamed to fill the cavity (26) in a known manner to form the desired cushion (28) as shown in FIG.

When the cushion (28) is removed from the mold (18), it will have the shape shown in Figure 4, with the strips (22) being approximately flush with the outer surface (30) and the hooks (32) protruding; Fifth
The result is likely to be □ as detailed in the figure. That is, the foam forming liquid flows into the IK (20) before or during foaming and surrounds the hook (32), so that the hook (32) area is also filled with the foamed plastic material of the cushion (28). It ends up.

U.S. Pat. No. 4,563,380 discloses a method for forming fastener strips in place and solving the above problems.

6 to 8 are simplified diagrams thereof. As shown in FIG. 6, one synthetic fastener strip (34) is embedded in the surface of the cushion (28). This composite strip (34)
is provided with a backing strip (36) having an outer surface (38) which faces the foam material during molding, the outer surface (38) being provided with fabric loops (40), or hooks, etc., for application of foam-forming liquid. The surface is shaped so that it surrounds and is eventually embedded in the outer surface (30) of the cushion (28). In addition, the synthetic strip (34) has a hook (3
A fastener strip (42) having an outer surface (44) provided with hook-and-loop material such as 2).

Although the hook-and-loop fastener-shaped touch fastener has been described above, similar effects can be obtained with other touch fastening methods that can be used as described below.

The backing strip (36) and the fastener strip (42) are
As shown in the figure, the inner surfaces (46) and (48) are facing each other.

They are attached with the outer surfaces (38) and (44) facing outward, with a thin piece of iron (52) sandwiched between them, and bonded at the joint (50) by known means such as hot fusion welding or ultrasonic welding. I can wear it.

As mentioned above, the width of the backing strip (36) is wider than the fastener strip (42) when viewed from the outer surface (44).

A portion (54) of the inner surface (46) of the backing strip (36) protrudes the same dimension from both sides of the fastener (42).

In order to protect the hook (32) during molding and to eliminate the contamination shown in FIG.
56) and fasten it to the exposed portion (54) of the same size.

In use, before filling the mold (18) with the foam-forming liquid (24), the synthetic strip (3) is placed in the groove (20) as shown in FIG.
4), the fastener strip (42) is inserted into the groove (20), with a polyethylene sheet (56) sandwiched between them, and the exposed portion (54) of the same size of the backing strip (36) is inserted into the mold. (
18) so that it rests on the upper outer edge (58) of the bottom.

Additionally, a magnet (60) is provided below the groove (20) to attract the metal piece (52), retaining the composite strip (34) within the groove (20), and attaching the exposed portion (54) to the upper outer edge ( 58)
to prevent the foam forming liquid (24) from flowing in.

The conventional techniques shown in FIGS. 6 and 7 are theoretically possible, but in practical terms, problems such as those shown in FIG. 8 are involved.

That is, the magnet (60) performs its desired function by attracting the center of the composite strip (34) to the bottom of the groove (20), while the backing strip (36) is heated during molding; The center is arched and the exposed part (54
) between the polyethylene sheet (56) and the upper outer edge (58) adjacent to the groove (20), a foam-forming liquid (24) is applied.
It is easy to create a gap (62) for passing through. In addition, it is only effective in the manufacturing process where the hooks (32) are exposed by post-curing at a temperature higher than the desired melting temperature of the polyethylene sheet (56).
) peels off from the finished cushion (28) after molding.

SUMMARY OF THE INVENTION A first object of the present invention is to embed fastener strips in a foam cushion that form an effective seal during molding along the groove edges containing the active surface of the fastener. The purpose of the present invention is to provide a fastener material that is

A second object of the present invention is to provide a fastener material that can be manufactured by a molding process that does not require a high temperature post-forming process to peel the protective polyethylene sheet from the fastener strip active surface.

The above object is achieved by embedding the fastener strip into the surface of the urethane foam or the like within the mold during molding.

The strip, when molded, consists of a backing strip having an outer surface facing the foam and a fastener strip having an outer surface with a touch fastening system, such as a hook-and-loop fastener, on one half thereof; The strips have inner surfaces facing each other,
It is pasted together with the outside facing outward. Also, by overlapping the longitudinal grooves of the mold and fitting the fastener material into the grooves, the foam-forming liquid is prevented from flowing into the grooves and contaminating the outer surface of the fastener strip.

The backing strip is wider than the fastener strip, has an inner surface that extends an equal amount from each side of the outer surface of the fastener strip, and has a fastener attached to the backing strip along an adjacent line between the edges of the fastener strip. Fastener material - by providing a pair of polyethylene membrane strips extending between the outer edges of the half and the outer edges of the backing strip to form two gasket strips along opposite sides of the fastener material that contact the mold. When the strip is molded, a first pair of gaskets is formed along the line of groove adjacency where the backing strip contacts the mold, and a second pair of gaskets is formed along the line of abutment between the fastener strip and the groove sidewall. to prevent the inflow of foam-forming liquid.

In a preferred embodiment, the pair of gasket strips extend around the entire outer edge of the backing strip.

(Embodiment) A first embodiment (although not preferred) of the present invention is shown in FIGS. 9 and 10.

This embodiment can be used if it is desired to cover the hook (32) with a polyethylene sheet (56) in order to apply sufficient temperature to peel the polyethylene sheet during the post-forming process.

In the prior art of FIGS. 6 and 7, the polyethylene sheet (56) was attached to the backing strip (36) from the edge (64) and the metal strip (52) was positioned in the center of the composite strip (34). In this embodiment, the fastener strip (42) outwardly from the close point, the backing strip (36) edge (64) intermediate (
That is, the polyethylene sheet (56) is bonded to the backing strip (36) of the composite (34') by means of a hot melt adhesive (66) applied to the exposed area (54) towards the point (near the edge).
).

The backing strip has a plurality of loops (continuous hooks for hook-and-loop fasteners) that engage the form formed in the mold.
It is equipped with

It is preferable to extend the polyethylene sheet (56) to the outside of M (64) to secure excess gasket forming material.

This embodiment configuration is advantageous in terms of gasket formation if the metal strip (5z) is provided in the center, as shown in FIGS. 6 and 7, but the outer edge of the fastener strip (42) A magnet (60) (or a pair of magnets, if desired) can also be closely disposed on the inner edge of the exposed portion (54) that abuts the.

However, in this case, iron powder is embedded in the adhesive (66) instead of the metal piece (52), and the polyethylene sheet (
56) to the backing strip (36).

Incidentally, although it is known to incorporate particulate materials of this type into adhesives, the manner in which the adhesive is deployed in terms of fastening the polyethylene sheet (56) to the backing strip (36) is new and In combination with this, there is also a novelty in generating magnetic force at the same point.

Furthermore, as shown in FIG. 10, even if the backing strip (36) rises, the heat during molding and the foam forming liquid (24)
The detached outer m (68) is deformed by the pressure of the groove (2).
A gasket is formed between the backing strip (36) adjacent to the mold (18) and the outer edge (58) of the mold (18).

A preferred embodiment is shown in FIGS. 11 and 12, which is advantageous in that it does not require a post-forming and heating step after stripping the polyethylene.

As shown in FIG. 11, the structure of the composite strip (34') is as follows:
It is substantially similar to that of FIG. However, this embodiment uses a central magnetic attachment such as a strip (52) and a magnet (66), and a pair of polyethylene strips (70) in place of a single polyethylene sheet (56). its external shape, and the exposed part of the lining strip (36) (
The installation procedure for 54) is the same, but its inner edge (72)
hook (32) over the edge of the fastener strip (42)
Since it extends to the starting point, the hook (32) always
exposed. Therefore, there is no need to peel off the polyethylene sheet (56) as in the prior art and the above embodiments.

Also, during molding, two gaskets are formed on both sides of the groove (20), of which the outer first gasket is the ninth gasket.
It is similar to that shown in FIG.
) is formed by the detached outer m (68) and the inner second
The gasket is formed by deforming the inner part M (72) into a curled shape, as shown in FIG. As a result, the 11th
The dual gasket system shown in Figures 1 and 12 does not require covering the entire hook (32) to prevent the inflow of foaming liquid.

The touch fastener used in the present invention includes a first planar backing material having a surface that carries a plurality of hooks, mushroom-shaped members, or spherical members on a stem or tail, and hooks, etc. of the first backing material. and a second planar backing having loop hooks, mushroom-shaped members, or spherical members that engage the components to fasten the components.

(Effects) As mentioned above, the fastener material according to the present invention has a pair of
By providing a V- polyethylene membrane strip and forming gaskets at appropriate locations, it is possible to easily prevent the foam forming liquid from entering the mold groove and contaminating the fastener area, and to avoid unnecessary Processing steps can be omitted.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a fastener material according to the present invention. FIG. 2 is a schematic cross-sectional view of a mold showing a state when a foam forming liquid is introduced in manufacturing a fastener material according to the present invention. FIG. 3 is a sectional view similar to FIG. 2, showing the state after foaming. FIG. 4 is a detailed view showing the cut-out shape of the product formed in the manner of FIGS. 2 and 3. FIG. FIG. 5 is an enlarged view of the mounting strip portion of FIG. 4, illustrating the problem that the present invention seeks to solve. FIG. 6 is a cross-sectional view of the prior art showing a protective cover placed over the fastener strip before molding. FIG. 7 is a sectional view similar to FIG. 6, showing the bowl after molding. FIG. 8 is an enlarged view showing how the strip side overlaps the groove edge in the prior art, leaving a gap where the foam forming liquid can enter and contaminate the fastening surface. FIG. 9 is a sectional view of a fastener material according to a first embodiment of the present invention. FIG. 10 is a detailed view of one side showing the state in which the fastener material of FIG. 9 is placed in a mold. FIG. 11 is a sectional view of a fastener material according to a second embodiment of the present invention. Figure 12 shows that the fastener material in Figure 11 is placed on both sides of the mold groove.
FIG. 6 is a detailed view of one side showing how to form a pair of gaskets. 10... Fabric, 12... Hook/loop fastening material, 14... Foam cushion,
16...Hook/loop material, 18...Type,
20... Groove, 22... Hook and loop material strip, 24... Foam forming liquid, 26... Mold cavity, 28... Cushion. 30...Cushion outer surface, 32...Hook, 34...Synthetic strip, 36...Backing strip, 38
...Backing strip outer surface, 40...Loop, 4
2... Fastener strip, 44... Fastener strip outer surface. 46... Inner surface of lining strip, 48... Inner surface of fastener strip, 50... Joint portion, 52
...A piece of iron. 54... Same size exposed strip portion, 56... Polyethylene sheet. 58... Car outer edge at the bottom of the mold, 60... Magnet,
62...Space, 64...Backing strip edge, 66...Adhesive, 68.
...Free outer edge, 70...Polyethylene strip,
72... Inner edge of strip.

Claims (9)

[Claims] (1) A lining strip that is embedded in the surface of the urethane foam, etc. in the mold during molding, and that has an outer surface that faces the foam material during molding, and a fastener strip that has an outer surface that uses a touch fastening method in half. The backing strip and the fastener strip are pasted together with the inner surfaces facing each other and the outer surfaces facing outward, and the backing strip is overlapped in the mold groove, and the fastener strip is placed in the mold groove. a fastener material configured to fit, in order to prevent foam-forming liquid from entering the groove and contaminating the outer surface of the fastener strip, the backing strip being configured to (b) a pair of polyethylene membrane strips are disposed along the exposed portions, and (b) a pair of polyethylene film strips are disposed along the exposed portions. , along an adjacent line of the fastener strip edge, both sides of the fastener material attached to the exposed portion and extending between the fastener strip outer edge and the backing strip outer edge and in contact with the mold. forming two breakaway gasket strips along the groove to prevent foam-forming fluid from entering the groove so that the gasket strip is adjacent to the groove during molding of the fastener strip. A fastener material characterized in that a first pair of gaskets is formed along a line of contact between the backing material and the mold. (2) The fastener material according to claim (1), wherein the gasket strip further forms a second gasket pair along the line of contact between the fastener strip and the groove side wall. . (3) Each pair of strips extends over the entire outer edge of the backing strip.
) Fastener materials listed in item ). (4) the membrane strip extends from the close point of the fastener strip edge;
The fastener material according to claim 2, wherein the fastener material is fastened to the backing strip to a midpoint between the edge of the fastener strip and the outer edge of the backing strip. (5) The membrane strip is fastened to the backing strip with an adhesive containing particles of magnetic material and adapted to attract the backing material and the gasket to the upper outer edge of the groove. The fastener material according to the range item (4). (6) A lining strip that is embedded in the surface of the urethane foam, etc. in the mold during molding, and that has an outer surface that faces the foam material during molding, and a fastener strip that has an outer surface that has half a touch fastening type. The backing strip and the fastener strip are pasted together with the inner surfaces facing each other and the outer surfaces facing outward, and the backing strip is overlapped in the mold groove, and the fastener strip is placed in the mold groove. a fastener material configured to fit, in order to prevent foam-forming liquid from entering the mold groove and contaminating the outer surface of the fastener strip; (b) a polyethylene film strip is wider than the strip and is disposed on an inner surface to form a strip portion exposed from both sides of the outer surface of the fastener strip; , disposed across the fastener strip, attached to the exposed strip portion along adjacent edges of the fastener strip, and extending between outer edges of the backing strip to contact the mold. A breakaway gasket strip is formed along both sides of the fastener material to prevent foam-forming fluid from entering the groove, so that the gasket strip is free from the backing during molding of the fastener strip. A fastener material characterized in that a pair of gaskets are formed along an adjacent line between the material and the mold groove. (7) The fastener material according to claim (6), characterized in that the backing strip extends over the entire outer edge. (8) The fastener strip is fastened to the lining strip from a point where both edges of the fastener strip are in contact with each other to a midpoint between the edge of the fastener strip and the outer edge of the lining strip. The fastener material described in (6). (9) A membrane strip is fastened to the backing strip with an adhesive containing particles of magnetic material and adapted to attract the backing material and gasket to the upper outer edge of the mold groove. The fastener material according to claim (8).