JP2011024864A - Hook-and-loop fastener having directional engaging force - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hook-and-loop fastener whose engaging force varies with the direction, and particularly the hook-and-loop fastener whose engaging force varies with the direction preferably used for fixing articles on display or the like to the wall surface, or for a disposable diaper or a diaper cover. <P>SOLUTION: In this hook-and-loop fastener having directional engaging force, on a base plate formed of thermoplastic resin, a number of stems formed of the same resin are provided. The stems have the substantially same width at the middle part in the direction of height and at the tip part, and the stems each have the substantially same and unidirectional inclination with respect to the base plate. A number of stems are arranged side by side at spaces 0.5-5.0 times as large as the width of the stem in the direction orthogonal to the direction of inclination, and the thus formed stem arrays are provided in a multiple on the base plate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hook-and-loop fastener whose engagement force varies depending on the direction, and more specifically, a surface which can be suitably used for fixing an exhibit or the like on a wall surface, or a disposable diaper or diaper cover, etc. Regarding fasteners.

As a means of attaching a photographic panel or painting to the wall surface, a screw nail having a hook portion on the head is driven into the wall surface, or a resin molded product having a hook-like projection portion is attached to the wall surface with an adhesive or adhesive, and the photographic panel A method of hanging a string on a picture frame and hooking the string on a hook part or a hook-shaped protrusion is generally used.
However, in recent years, the number of houses with a structure in which screw nails cannot be driven into the wall has increased, and among the conventional methods described above, there are many cases where the method of directly driving screw nails into the wall surface cannot be adopted. In the case of this method, since the hook part protrudes several centimeters from the wall surface, when a photo panel or a picture frame is hung on such a hook, the panel or picture frame protrudes greatly from the wall surface, and there is a gap between them. In the meantime, dust or the like accumulates, or the protruding panels and picture frames obstruct people.

  As an alternative to such a conventional method, a hook-and-loop fastener such as a hook fastener is attached to the wall surface, while another hook-and-loop fastener that can be engaged with the hook-and-loop fastener on the back surface of the photographic panel or frame, for example, a loop surface. There is known a method in which a photograph, a frame, or the like is closely fixed to a wall surface by attaching a fastener and engaging a double-sided fastener.

  However, in the case of such a method, most of the engaging elements present on the hook hook-and-loop fastener are hardly involved in the engagement. For example, among the hook elements, the hook element is in the direction of gravity. And the like are hardly involved in the engagement force, and the engagement force gradually decreases as the loop element is cut or the hook element is broken while the engagement and separation are repeated. Furthermore, when peeling off, it is necessary to peel off with a considerable force, and in some cases, the photographic panel and the frame may be damaged. Further, when positioning is performed, it is necessary to repeat the engagement and separation many times, which requires time and effort for the separation. In particular, when it is necessary to frequently replace or detach the attachment / detachment, the number of times the engagement / disengagement operation is repeated increases, and the engagement force decreases.

  In addition, hook fasteners are used for baby diaper covers and diapers, but if you remove the hook fasteners to replace the diaper cover or diaper, an unpleasant noise may be heard and disturb the infant's sleep. It becomes. Furthermore, there is a problem that the engagement force is reduced over and over again and peels off when it should not be peeled off.

  As a hook-and-loop fastener that solves such a problem, for example, Japanese Patent Laid-Open No. 7-124004 proposes a hook-and-loop fastener in which a stem made of a monofilament is obliquely implanted in only one direction with respect to a substrate. However, in the case of a stem made of monofilament, the engaging element (stem) cannot be made very thick in the manufacture of the hook-and-loop fastener, and the engaging element density is limited, so that a heavy one can be engaged. In addition, it is extremely difficult to incline all the stems in almost the same direction, and some stems facing in the other direction prevent the engagement, resulting in a significant loss of the overall engagement force. Yes. Furthermore, in the case of a hook-and-loop fastener in which such a monofilament is tilted in one direction, a force applied to the stem during use often impairs the tilt direction of the monofilament. For example, a force to tilt the monofilament in the reverse direction is added. In such a case, the inclination direction of the monofilament is greatly changed, the engagement force is greatly reduced, and in some cases, the engagement force is completely lost.

  In addition, International Publication No. WO93 / 02005 describes a hook-and-loop fastener having a directionality to an engaging force having a hook element inclined in one direction by using a yarn pulling phenomenon of a synthetic resin. With such a hook-and-loop fastener, each hook element has a low engaging force, and it is difficult to increase the hook element density. Therefore, it is structurally difficult to manufacture a hook-and-loop fastener having a high engaging force.

Japanese Patent Laid-Open No. 7-124004 (Claims) International Patent Publication WO93 / 02005 (Overall)

  The problem of the present invention is that the loop of the hook-and-loop fastener is cut or hooked by repeating the engagement-peeling, which is a drawback of the conventional hook-and-loop fastener, without protruding greatly from the wall surface as in the conventional mounting bracket. This eliminates the problem that the engagement force is reduced due to breakage, the problem that the engagement force is not necessarily high, and the problem that a loud noise is heard when peeling off. This solves the problem that the engaging surface fastener has a low engaging force or a low engaging force.

  That is, according to the present invention, there are a large number of stems made of the same resin on a substrate made of a thermoplastic resin, and the stems have substantially the same width at the middle portion and the tip portion thereof. Each of the stems has an inclination in substantially the same direction with respect to the substrate, and further, an interval of 0.5 to 5.0 times the stem width is provided in a direction intersecting the inclination direction. The hook-and-loop fastener has directionality in engagement force, characterized in that a large number of stems are arranged in parallel, and a plurality of such stem rows are present on the substrate.

  Further, the present invention includes a linear slit and a plurality of continuous rows inclined in the same direction on the surface by melting and extruding a thermoplastic resin from a nozzle having a plurality of linear slits extending in the same direction extending from the slit. A tape is produced, and a continuous line of the obtained tape is cut at small intervals in a direction crossing the tape length direction, and the gap is widened by stretching the tape in the length direction. It is a manufacturing method of the hook_and_loop | surface fastener which has directionality in the engaging force made into.

Preferably, in the above invention, the height of the stem is 0.3 to 3.0 mm and the stem width is 0.2 to 2.0 mm, and the top of the stem is flat. In the case where the stems exist on the substrate at a density of 20 to ²⁰⁰ per cm ² of the substrate, and the substrate is extended in the direction of the stem row. A case where the cross-sectional area of each stem in the direction parallel to the substrate in the middle portion of the height is 0.04 to 4.0 mm ² is a preferable case.

  In the surface fastener of the present invention, stems having substantially the same width inclined in the same direction (longitudinal direction) are arranged in parallel in the lateral direction with a narrow gap, and there are a plurality of such stem rows in the vertical direction. Therefore, there are few drawbacks that the loop of the hook-and-loop fastener is cut by repeating engagement and peeling, which is a drawback of the conventional hook-and-loop fastener, and the engagement force is reduced by breaking the hook, and the stem is thick, In addition, since the number of stems can be easily increased, the engagement force is high, and noise is hardly generated when peeling. Furthermore, the engagement force is higher than that of conventionally known directional surface fasteners.

It is a perspective view of an example of a hook-and-loop fastener which has directionality in engagement force of the present invention. FIG. 2 is a cross-sectional view of the hook-and-loop fastener of FIG. 1 as viewed from the X direction, and particularly an enlarged one stem. It is an expanded sectional view of the stem part of the hook-and-loop fastener different from FIG. It is the figure which looked at the hook_and_loop | surface fastener of FIG. 1 from the Y direction, and is the figure which expanded three adjacent stem parts. It is sectional drawing which shows another example of the stem seen from the X direction. It is a figure which shows an example suitable for the nozzle used for manufacturing the surface fastener of this invention.

1 to 6, a hook-and-loop fastener according to the present invention that has a high engagement force in a specific direction and a low engagement force in other specific directions or substantially no engagement force will be described. .
The surface fastener of the present invention is composed of a substrate made of a thermoplastic resin and a large number of stems made of the same resin. The thickness of the substrate is preferably 0.1 to 1.0 mm. Each of the stems (2) has an inclination in substantially the same direction with respect to the substrate (1) (the T direction in FIGS. 1 and 2), and a direction intersecting the inclination direction. Many stems are arranged in parallel at intervals (S shown in FIG. 4) 0.5 to 5.0 times the stem width (W shown in FIG. 4) (Z direction in FIGS. 1 and 4). Furthermore, there are a plurality of such rows of stems in parallel (three rows in FIG. 1) on the substrate, and each stem has a substantially the same width at the middle portion of the stem and the tip portion of the stem. Have. When these stems are not tilted in the same direction, that is, when individual stems are tilted in different directions, a high engagement force does not appear in a specific direction, and there is little or no engagement force. Even if you do it, it will be very low. In the present invention, it is most preferable that all the stems are tilted in exactly the same direction, but there may be stems that are not tilted in the same direction if very little.

  In the present invention, it is important in the hook-and-loop fastener of the present invention that the stems are arranged in parallel in the direction intersecting the tilt direction of the stem (the Z direction in FIG. 1). As a result, the engaging force is greatly improved. The direction intersecting with the tilt direction means a state in the range of 30 ° to 150 ° with respect to the tilt direction of the stem (T direction shown in FIGS. 1 and 2). When the hand touches the stem of the surface fastener manufactured using the manufacturing process, the top of the stem may damage the hand. More preferably, it is a case where the stems are arranged in parallel at an angle of 45 to 135 °, particularly preferably 60 to 120 ° with respect to the tilt direction.

  The presence of a plurality of such stem rows in parallel is important in terms of enhancing the engagement force and facilitating engagement. That is, when there is only one stem row, if there is no loop element to be engaged at a position corresponding to that row, the stem row cannot be engaged. It will be inferior. The stem row interval (distance at the root portion of the stem constituting the adjacent stem row) is preferably 0.5 to 5.0 mm.

  And in the surface fastener of this invention, each stem has the substantially same width | variety in the intermediate part of the height of a stem, and a stem front-end | tip part. The width of the stem here is W shown in FIG. 4. For example, in the hook surface fastener described in the well-known International Patent Publication No. WO93 / 02005, the stem becomes thinner toward the tip, And the front-end | tip part is coiled. In the case of such a stem, the stem does not invade strongly in the loop surface fastener, and therefore the engagement force is low. In the present invention, having substantially the same width means that the ratio of the width of the middle portion of the stem to the width of the tip portion is in the range of 2/3 to 3/2. ing. The width, height, and gap width are average values of 10 stems selected arbitrarily or 10 stems.

In the present invention, preferably, the height of the stem (H shown in the figure) is 0.3 to 3.0 mm. When the height of the stem increases, the stem bends or breaks when a force is applied to a specific stem. On the other hand, if it is too low, it will be difficult to catch the loop element, and the engaging force will be reduced. More preferably, it is the range of 0.4-1.5 mm.
Further, the stem width (W shown in the figure) is preferably 0.2 to 2.0 mm. If it is too wide, it is difficult to engage with the loop element, and conversely if it is too narrow, the stem strength decreases and the engagement force decreases. Become. More preferably, it is the range of 0.25-1.0 mm.

  Further, in the present invention, it is preferable that the stem tip is flat or rounded as shown in FIG. As used herein, the tip is a portion parallel to the substrate at the top of the stem, that is, having a flat or rounded shape means that the tip of the stem is flat or rounded in a plane parallel to the substrate. Means state. When the stem tip is not flat, for example, when it has a pointed shape, the stem tip stimulates the hand when touching such a hook-and-loop fastener, which is not preferable in terms of touch.

  In the present invention, the tip of the stem may be bent in the direction of the substrate as shown in FIG. By bending in this way, the loop element engaged with the stem can be prevented from being disengaged simply by applying tension in the stem height direction. More preferably, the bend F in the substrate direction shown in FIG. 3 is 0.05 to 0.5 mm and the stem height H is in the range of 1/50 to 1/5.

Furthermore, in the hook-and-loop fastener of the present invention, preferably, the stem is present on the substrate at a density of 20 to ²⁰⁰ per 1 cm ² of the substrate. When the number is greater than 200, the adjacent stems interfere with each other, and a sufficient engagement force cannot be obtained. More preferably, the density is in the range of 50 to 150 / cm ² .

  Further, the inclination angle (θ) of the stem shown in FIG. 2 is preferably 25 to 70 °, and when it is less than 25 °, it is difficult to be caught by the loop fiber, and when it exceeds 70 °, the caught loop fiber is easily detached. In both cases, a sufficient engaging force cannot be obtained. More preferably, it is the range of 30-60 degrees. Further, it is necessary that the eaves portion of the stem that holds the loop fiber is formed by tilting the stem, and the engagement force is such that the distance D shown in FIG. 2 is 0.2 to 3.0 mm. It is preferable in terms of expression.

In the surface fastener of the present invention, it is preferable that the cross-sectional area of each stem in the direction parallel to the substrate in the middle portion of the stem height is 0.02 to 4.0 mm ² . When the cross-sectional area is less than 0.02 mm ² , the stem is easily bent and the engagement force is reduced. On the other hand, when it exceeds 4.0 mm ² , the texture becomes hard, which is not preferable. More preferably in the range of 0.06~2.0mm ^2. The cross section here is a cross section in a plane perpendicular to the inclination of the stem.

  Further, in the present invention, in order to prevent the engaged loop fibers from being easily detached from under the stem eaves, as shown in FIG. The protrusions 3 may have a small interval so as to have a constant width like the stem, or may exist as protrusions continuous in the stem row direction. By having such a protrusion, it is possible to prevent the panel and the frame from being accidentally dropped.

Next, the manufacturing method of the hook_and_loop | surface fastener which has directionality in engagement force of this invention is demonstrated.
First, a thermoplastic resin is melt-extruded from a nozzle (4) having slits as shown in FIG. 6, and a tape having a row of strips that are inclined with respect to the substrate is formed on the surface of the substrate.

  These molded products can be manufactured not only by extrusion molding but also by injection molding. However, a hook-and-loop fastener having various hook element rows of different lengths can be freely manufactured, and since it is stretched, the hook element is excellent in strength, the hook elements are difficult to peel off, and the hook density is high. It is preferable to use extrusion molding because it can be easily produced.

  6 is a linear slit that constitutes the substrate, and 6 is a plurality of linear slits that are inclined in the same direction that constitute the stem.

  Examples of the thermoplastic resin used include polyolefin resins, polyester resins, polyamide resins, and ethylene-vinyl alcohol copolymers. In particular, polypropylene is used in terms of stretchability, melt extrusion stability, and stem strength. A preferred example is a polyolefin-based resin represented by When the slits of FIG. 5 are used, a tape in which seven strips having an inclination on the substrate surface are present at equal intervals can be obtained. The number of rows is suitably 3 to 60, preferably 5 to 40. The tape width is preferably 30 to 90 mm before stretching.

  Next, a cut is made in the line existing on the surface of the obtained tape to the vicinity of the root at small intervals. An appropriate interval between the cuts is 0.2 to 2.0 mm. Next, the tape is stretched in the length direction. The stretching ratio is preferably such that the tape length after stretching is 1.5 to 4.0 times the length of the original tape. By this stretching, the cuts formed in the rows are expanded, and the rows become stem rows made up of a large number of independent stems.

  In the hook-and-loop fastener of the present invention, in order to increase the adhesive strength on the wall surface or the like, the back surface may be provided with unevenness. For example, when manufacturing the tape-like extrudate, the back surface is provided with ridges or depressions. Articles may be provided.

  When using the hook-and-loop fastener of the present invention, an adhesive or adhesive is applied to the wall surface or the object to be pasted so that the stem of the hook-and-loop fastener faces in the direction opposite to the gravity direction or in the direction opposite to the tension direction. Fix with an agent. On the other hand, examples of the mating surface fastener engaged with the surface fastener of the present invention include a surface fastener having a loop element or loop fiber on its surface, a nonwoven fabric, a woven or knitted fabric. Of course, the fibers constituting the loop element and the loop fibers must be thick enough to be stored under the eaves of the stem. A hook-and-loop fastener or fabric having these loops is fixed to the back surface of the panel or the frame with an adhesive or an adhesive.

The hook-and-loop fastener of the present invention is used to fix a photographic panel, a picture frame, a bulletin board or the like to a wall surface. That is, the hook-and-loop fastener of the present invention is fixed to the wall surface using an adhesive or an adhesive on the wall surface so that the direction of the inclination of the stem is opposite to the weight direction. Loop hook-and-loop fasteners, or non-woven fabrics and woven or knitted fabrics that have a large number of loop fibers on the surface, and panels, frames, bulletin boards, etc. along the wall surface from above so that they can be engaged. And engage and unify both.
When removing the panel, the frame, and the bulletin board from the wall surface, they are lifted upward from the wall surface to release the engagement.

  Moreover, it can replace with the hook_and_loop | surface fastener conventionally used for a disposable diaper, a diaper cover, etc., and the hook-and-loop fastener of this invention can also be used, In that case, the cracking sound at the time of peeling can be eliminated. In addition, fixtures used in places where tension is always applied, such as glove wrist fixing, clothing back and waist stoppers, low back pain belts, supporter stoppers, sphygmomanometer armband fasteners, elastic bandages It can also be used as a fastener for elastic packing bands.

1: Substrate 2: Stem 3: Loop element detachment prevention protrusion 4: Nozzle 5: Substrate forming slit 6: Stem forming slit T: Stem tilt direction Z: Stem row direction H: Stem height θ: Stem tilt Angle W: Stem width S: Stem interval D: Stem eave lower depth F: Stem sag

Claims (7)

There are a large number of stems made of the same resin on the substrate made of the thermoplastic resin, and the stems have substantially the same width at the intermediate portion and the tip portion thereof, and any of the stems Has a tilt in almost the same direction with respect to the substrate, and a number of stems are arranged in parallel at intervals of 0.5 to 5.0 times the stem width in a direction intersecting the tilt direction. A hook-and-loop fastener having directionality in the engaging force, wherein a plurality of such rows of stems exist on the substrate. The hook-and-loop fastener according to claim 1, wherein the height of the stem is 0.3 to 3.0 mm and the stem width is 0.2 to 2.0 mm. The hook-and-loop fastener according to claim 1 or 2, wherein a top portion of the stem is flat. The hook-and-loop fastener according to any one of claims 1 to 3, wherein the stem is present at a density of 20 to ²⁰⁰ per 1 cm ^{2 of the} substrate on the substrate. The hook-and-loop fastener according to any one of claims 1 to 4, wherein the substrate is extended in the stem row direction. Surface fastener according to claim 1 the cross-sectional area of each stem in the substrate parallel to the direction in the intermediate portion of the stem height is 0.04~4.0mm ^2. A thermoplastic resin is melt-extruded from a nozzle having linear slits and a plurality of linear slits extending in the same direction extending from the slits, and a tape having a plurality of continuous rows inclined in the same direction on the surface is produced. Engagement force is characterized in that a continuous line of tape is cut at small intervals in a direction crossing the tape length direction, and the gap is widened by stretching the tape in the length direction. A method for manufacturing a surface fastener having directionality.

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