Sheet with excellent quietness and male-shaped molded hook and loop fastener and method for producing the same

Abstract

The present invention provides a sheet with a male-shaped hook and loop fastener, wherein a non-foamed resin sheet (B) is integrally provided on the back of the male-shaped hook and loop fastener (A), and the male-shaped hook and loop fastener (A) is configured as follows: the male-shaped hook and loop fastener (A) comprises a resin substrate (a1), and a plurality of male-shaped hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1), the male-shaped hook elements (a2) being bent in the middle in the same direction as the row direction of the male-shaped hook elements, and the front end of the male-shaped hook elements (a2) being bent in the middle in the same direction as the row direction of the male-shaped hook elements The male type hook element (a2) is close to the substrate (a1), and is formed of the same resin as the resin constituting the substrate (a1). A non-foamed resin sheet (B) is directly and integrally laminated on the back side of the male type molded hook and loop fastener (A). The resin constituting the non-foamed resin sheet (B) is a resin mainly composed of an elastomeric resin of the same type as the resin constituting the male type molded hook and loop fastener (A), and the hardness of the resin constituting the non-foamed resin sheet (B) is lower than that of the resin constituting the male type molded hook and loop fastener (A).

Description

Technical Field

[0001] The present invention relates to a sheet with male molded hook and loop fastener which emits little peeling noise when peeling off the hook fastener having a loop hook element and has excellent quietness, and a method for producing the same. Background Art

[0002] Conventionally, as one of the methods for mounting an object on the surface of an object, the following method has been used: a male Velcro having male hook-type or mushroom-type hooking elements is mounted on the surface of one of the object and a female Velcro having loop-type hooking elements is mounted on the surface of the other; the hooking element surfaces of the two Velcros are then overlapped so that the two hooking elements are hooked together, thereby fixing the object to the surface of the object.

[0003] Moreover, as the advantage of such a hook and loop fastener, it can be repeatedly hooked and peeled off, and even if it is repeatedly hooked and peeled off, it also maintains a high hooking force. On the contrary, as the disadvantage of the hook and loop fastener, it can be cited that a large peeling sound of creaking is generated when peeling off, which is not suitable for the purpose of hooking / peeling the hook and loop fastener in a quiet environment.

[0004] For example, if in the articles for use towards breast / infant, use Velcro, the sound that sends when peeling off can hinder the sleep of breast / infant, in addition, if Velcro is used for the spare parts, clothes, shoes, helmet etc. that use in the army, the sound that produces when peeling off can make the enemy find.In addition, if in wild bird observation, music appreciation etc. require quiet places, the Velcro of the articles for use with Velcro is peeled off, the peeling sound that sends at this moment can cause wild birds etc. to escape, or bring trouble to the audience who is listening to music in a devoted manner.In addition, when Velcro is used for golf gloves, the sound when Velcro is peeled off can hinder the mental concentration of other competitors.And the creaking sound that sends when Velcro is peeled off can't be considered as the sound with high-grade sense anyway, in any purpose, use Velcro, the sound that sends when all preferably peeling off is as little as possible, therefore seek a kind of Velcro that peels off sound is little.

[0005] The main reason for the loud peeling sound made by the hook and loop fastener when peeling is the male hook and loop fastener. According to the above requirements, a so-called silent male hook and loop fastener with small peeling sound is desired, and several solutions that meet this expectation have been proposed so far.

[0006] For example, Patent Document 1 records that a male Velcro with vibration-proof material obtained by adhering a vibration-proof material layer formed of natural rubber or synthetic rubber to the back of a fiber Velcro by an adhesive has excellent quietness. The fiber Velcro has a large number of male hook elements formed by monofilaments with a fineness of 100 to 500 dtex on the surface of a woven or knitted base fabric.

[0007] In addition, Patent Document 2 describes a fabric male or female Velcro that reduces the peeling sound by laminating an adhesive layer on the back of the fabric Velcro, wherein the fabric Velcro has a large number of hook-shaped hooking elements formed by single filaments with a filament diameter of 0.1 to 0.3 mm or annular hooking elements formed by multifilament yarns of 100 to 400 dtex containing 5 to 50 filaments on the surface of the fabric base cloth.

[0008] However, in the case of the technology of the above-mentioned Patent Document 1, the effect of reducing the peeling sound is not necessarily high. Furthermore, if the hooking / peeling is repeated, peeling is likely to occur in the adhesive layer. As a result, the effect of reducing the peeling sound of the male hook element formed of a monofilament is likely to decrease, and it is difficult to reliably transmit the peeling sound vibration of all the male hook elements from their roots to the anti-vibration material layer and attenuate the vibration through the anti-vibration material layer. In addition, in the case of the male hook element formed of a monofilament, the hook element is formed of a stretched thick and long monofilament, so there is a tendency to continue to vibrate greatly during peeling, and the peeling sound naturally becomes louder. Moreover, even if the creaking peeling sound emitted by the male hook element formed of a monofilament is reduced to some extent, it is still a creaking noise with no quality.

[0009] In the technology of Patent Document 1, if a cross-linking adhesive is used as the adhesive, peeling of the adhesive layer caused by repeated hooking / peeling can be reduced. However, in this case, the male hook and loop fastener becomes hard and cannot be used for applications such as clothing and gloves that require softness.

[0010] In the case of the technology of the above-mentioned Patent Document 2, as in the case of the technology of the above-mentioned Patent Document 1, the effect of reducing the peeling sound is not high, and the adhesive layer is easily peeled due to repeated hooking / peeling, and it is difficult to reliably transmit the peeling sound vibration of all male hook elements from their roots to the adhesive layer. In addition, since the male hook element is a thick, stretched long monofilament, there is a tendency to continue to vibrate greatly during peeling, and when an adhesive layer is used, if the amount of adhesive pasted on the back is increased in order to increase the reduction of the peeling sound, dust is easily attached to the adhesive, and it is difficult to say that it is a preferred technology from the perspective of aesthetics. In addition, as in the technology of the above-mentioned Patent Document 1, even if the creaking peeling sound emitted by the male hook element formed of the monofilament is reduced to some extent, it is still a creaking noise with no quality.

[0011] Prior art literature

[0012] Patent Literature

[0013] Patent Document 1: Japanese Patent No. 4354232

[0014] Patent Document 2: Japanese Patent Application Publication No. 2007-7124 Summary of the invention

[0015] Problems to be solved by the invention

[0016] The object of the present invention is to provide a silent sheet with male-shaped molded Velcro, which makes a very quiet peeling sound when peeling off the hook. Even if the hooking / peeling is repeated as in the above-mentioned prior art, the peeling sound reduction effect is hardly reduced, and there is no problem of loud peeling sound caused by the male-shaped hook element being a thick and long stretched monofilament and easily vibrating. In addition, the peeling sound vibration of the root of all the male-shaped hook elements can be reliably transmitted to the sheet on the back, and the peeling sound can also be changed into a steady peeling sound different from the creaking noise, and the problem of dust adhesion caused by the adhesive will not occur.

[0017] Solutions to the problem

[0018] That is, the present invention relates to a sheet with a male molded hook and loop fastener, wherein a non-foamed resin sheet (B) is integrally provided on the back of a male molded hook and loop fastener (A), and the following conditions 1) to 4) are satisfied.

[0019] 1) The male molded hook and loop fastener (A) comprises a resin substrate (a1), and a plurality of male hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1);

[0020] 2) the male hook element (a2) is bent in the middle in the same direction as the row direction of the male hook element, the front end of the male hook element (a2) is close to the base plate (a1), and the male hook element (a2) is formed of the same resin as the resin constituting the base plate (a1);

[0021] 3) A non-foamed resin sheet (B) is directly laminated integrally on the back of the male molded hook and loop fastener (A);

[0022] 4) The resin constituting the non-foamed resin sheet (B) is a resin mainly composed of an elastomeric resin of the same type as the resin constituting the male-type molded hook and loop fastener (A), and the hardness of the resin constituting the non-foamed resin sheet (B) is lower than that of the resin constituting the male-type molded hook and loop fastener (A).

[0023] It is also preferred that in such a sheet with male-type molded hook and loop fastener, the resin constituting the male-type molded hook and loop fastener (A) is a resin with any resin selected from polypropylene resin, polyester elastomer resin, and polyamide resin as the main body, and the D-type durometer hardness of the resin constituting the male-type molded hook and loop fastener (A) is in the range of 50 to 100 based on JIS K 7215, and the D-type durometer hardness of the resin constituting the non-foamed resin sheet (B) is in the range of 10 to 70 based on JIS K7215, and the difference in hardness between the two is in the range of 20 to 60.

[0024] In addition, in such a sheet with male-shaped molded hook and loop fastener, the resin constituting the male-shaped molded hook and loop fastener (A) and the resin constituting the non-foamed resin sheet (B) are preferably any of the following 5) to 7).

[0025] 5) The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polypropylene resin, and the resin constituting the non-foamed resin sheet (B) is a resin mainly composed of an olefin elastomer resin;

[0026] 6) The resin constituting the male molded hook and loop fastener (A) and the resin constituting the non-foamed resin sheet (B) are both resins with polyester elastomer as the main component;

[0027] 7) The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polyamide resin, and the resin constituting the non-foamed resin sheet (B) is a resin mainly composed of a polyamide-based elastomer resin.

[0028] In addition, it is preferred that: in such a sheet with male-type molded hook and loop fastener, the thickness of the substrate (a1) is 0.15 to 0.30 mm, the thickness of the non-foamed resin sheet (B) is 0.2 to 4 mm, and the thickness of the non-foamed resin sheet (B) is greater than the thickness of the substrate (a1).

[0029] In addition, it is preferred that: in such a sheet with male molded hook and loop fastener, the male hook element (a2) of the male molded hook and loop fastener (A) has an inverted J-shape or a Y-shape, and the height from the substrate (a1) to the top of the male hook element (a2) is 0.2 to 1.5 mm.

[0030] It is further preferred that: in such a sheet with male-type molded Velcro, there is a continuous ridge-like protrusion on the surface of the substrate (a1) in the direction of the column of the hook elements (a2), the male hook elements (a2) stand up from the ridge-like protrusion, and the column of the male hook elements (a2) is formed along the ridge of the continuous ridge-like protrusion.

[0031] In addition, the present invention relates to a method for manufacturing a sheet with a male-shaped hook and loop fastener, the method comprising:

[0032] A male molded hook and loop fastener (A) satisfying the following conditions i) to iii) is placed in a recessed portion in a mold so that the male hook element (a2) is on the bottom side of the recessed portion, and in this state, a molten non-foamed resin satisfying the following condition iii) is injected into the mold and removed from the mold after cooling.

[0033] i) The male molded hook and loop fastener (A) comprises a resin substrate (a1), and a plurality of male hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1);

[0034] ii) the male hook element (a2) is bent in the middle in the same direction as the row direction of the male hook element, the front end of the male hook element (a2) is close to the base plate (a1), and the male hook element (a2) is formed of the same resin as the resin constituting the base plate (a1);

[0035] iii) The resin constituting the non-foamed resin sheet (B) is a resin mainly composed of an elastomeric resin of the same type as the resin constituting the male-type molded hook and loop fastener (A), and the hardness of the resin constituting the non-foamed resin sheet (B) is lower than that of the resin constituting the male-type molded hook and loop fastener (A).

[0036] In such a manufacturing method, it is preferred that the resin constituting the male molded hook and loop fastener (A) satisfies the following iv), and the non-foamed resin satisfies any of the following v) to vii).

[0037] iv) The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of any resin selected from polypropylene resin, polyester elastomer resin, and polyamide resin;

[0038] v) when the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polypropylene resin, the non-foamed resin is a resin mainly composed of an olefin elastomer resin;

[0039] vi) when the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polyester elastomer, the non-foamed resin is a resin mainly composed of a polyester elastomer resin;

[0040] vii) When the resin constituting the male molded surface fastener (A) is a resin mainly composed of a polyamide resin, the non-foamed resin is a resin mainly composed of a polyamide-based elastomer resin.

[0041] In addition, the present invention provides a method for manufacturing a sheet with a male-shaped molded hook and loop fastener, wherein the sheet with a male-shaped molded hook and loop fastener has a non-foamed resin sheet (B) on the back side of the male-shaped molded hook and loop fastener (A), the method comprising:

[0042] A molten resin satisfying the following conditions III) is passed over the surface of a metal roller satisfying the following conditions I) and II) and the molten resin is injected into the cavity. A sheet (B) made of a non-foamed resin satisfying the following conditions III) is superimposed on the surface of the molten resin on the metal roller and pressure-bonded. The molten resin is cooled and solidified in this state and then peeled off from the surface of the metal roller and extracted from the cavity.

[0043] I) The metal roller is formed by stacking thin annular molds with multiple cutouts in the shape of male hook elements carved on the outer circumference;

[0044] II) on the surface of the metal roller, a plurality of male hooking element cavities based on the cutout are arranged in a row in the circumferential direction of the roller, each cavity is bent in the row direction of the cavity midway, and the front end of the cavity is close to the surface of the metal roller;

[0045] III) The non-foamed resin is a resin mainly composed of an elastomer resin of the same type as that of the resin constituting the molten liquid, and the non-foamed resin has a lower hardness than the resin constituting the molten liquid.

[0046] In such a production method, it is preferred that the molten liquid satisfies the following IV) and the non-foamed resin satisfies any of the following V) to VII).

[0047] IV) the melt is a resin mainly composed of any resin selected from polypropylene resin, polyester elastomer resin and polyamide resin;

[0048] V) when the melt is a resin mainly composed of a polypropylene resin, the non-foamed resin is a resin mainly composed of an olefin elastomer resin;

[0049] VI) when the melt is a resin mainly composed of a polyester elastomer resin, the non-foamed resin is a resin mainly composed of a polyester elastomer resin;

[0050] VII) when the melt is a resin mainly composed of a polyamide resin, the non-foamed resin is a resin mainly composed of a polyamide elastomer resin;

[0051] In addition, the present invention relates to a method for manufacturing a sheet with a male-shaped molded hook and loop fastener, wherein the sheet with a male-shaped molded hook and loop fastener has a non-foamed resin sheet (B) on the back side of the male-shaped molded hook and loop fastener (A), the method comprising:

[0052] A sheet (B) in a molten state made of a non-foamed resin satisfying the following condition iii) is superimposed on the back of a male molded hook and loop fastener (A) satisfying the following conditions i) to ii) and pressure-bonded, and then cooled and solidified.

[0053] i) The male molded hook and loop fastener (A) comprises a resin substrate (a1), and a plurality of male hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1);

[0054] ii) the male hook element (a2) is bent in the middle in the same direction as the row direction of the male hook element, the front end of the male hook element (a2) is close to the base plate (a1), and the male hook element (a2) is formed of the same resin as the resin constituting the base plate (a1);

[0055] iii) The resin constituting the non-foamed resin sheet (B) is mainly composed of an elastomer resin of the same type as the resin constituting the male type molded fastener (A), and the hardness of the non-foamed resin is lower than that of the resin constituting the male type molded fastener (A).

[0056] In such a manufacturing method, it is preferred that the resin constituting the male molded hook and loop fastener (A) satisfies the following iv), and the non-foamed resin satisfies any of the following v) to vii).

[0057] iv) The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of any resin selected from polypropylene resin, polyester elastomer resin, and polyamide resin;

[0058] v) when the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polypropylene resin, the non-foamed resin is a resin mainly composed of an olefin elastomer resin;

[0059] vi) when the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polyester elastomer resin, the non-foamed resin is a resin mainly composed of a polyester elastomer resin;

[0060] vii) When the resin constituting the male molded surface fastener (A) is a resin mainly composed of a polyamide resin, the non-foamed resin is a resin mainly composed of a polyamide-based elastomer resin.

[0061] Effects of the Invention

[0062] In the sheet with male-type molded Velcro and its manufacturing method of the present invention, the male-type molded Velcro (A) is a molded Velcro in which the substrate (a1) and the male-type hook element (a2) are made of the same resin, so the vibration that causes the peeling sound generated in the male-type hook element (a2) can be reliably blocked by the substrate (a1).

[0063] In addition, the resin constituting the male molded hook and loop fastener (A) is of the same type as the non-foamed resin sheet (B) that is closely attached to the back thereof, and has affinity, so the vibration transmitted to the substrate (a1) of the male molded hook and loop fastener (A) is reliably transmitted to the non-foamed resin sheet (B) with the elastomer resin as the main body and reduced. Moreover, the peeling sound is not a creaking and uncomfortable noise, but a steady and low peeling sound that sounds pleasant to the ear.

[0064] In addition, since a non-foaming resin sheet (B) containing a specific resin and having excellent adhesion to the male-type molded hook and loop fastener (A) is directly and integrally laminated on the back side of the male-type molded hook and loop fastener (A), even if hooking / peeling is repeated, the problem of peeling of the adhesive layer will not occur because there is no adhesive layer.

[0065] The male hook element (a2) of the male molded hook and loop fastener (A) has a tapered shape when it is produced by pulling out from a cavity. Therefore, the peeling sound of the male hook element (a2) generated when peeling is basically smaller than that of a male hook element formed of a thick and long monofilament in which crystals are oriented in the longitudinal direction by stretching, such as a fabric-type hook and loop fastener.

[0066] The non-foamed resin sheet (B) is directly and firmly laminated integrally with the back side of the substrate (a1) when it is laminated and integrally arranged with the male Velcro (A) by inlay molding, or when the Velcro substrate (a1) is superimposed and crimped when the Velcro is molded while the Velcro substrate (a1) is in a molten state, so that the vibration generated by the male hook element (a2) that produces a peeling sound during peeling is reliably transmitted to the substrate (a1).

[0067] In addition, when the shape of the male hook element (a2) is an inverted J-shape or a Y-shape with a tapered front end, the sound generated during peeling is relatively small compared to the male hook elements such as T-shaped, arrow-shaped, mushroom-shaped hook elements in the case of male molded Velcro, in which the bulged part larger than the shaft is located at the top of the shaft.

[0068] Moreover, it is preferred that: in the present invention, the male hook element (a2) is relatively short and small compared with the male hook element used in the existing fabric-type Velcro and molded Velcro. In this case, the peeling sound itself is small. Preferably, the substrate (a1) of the male molded Velcro (A) is bonded to the non-foamed resin sheet (B) not only on the back side but also on the side, and more preferably the substrate (a1) is located below the surface of the non-foamed resin sheet (B). Thus, the vibration of the peeling sound transmitted to the back side of the male molded Velcro (A) can be reliably reduced by covering the back side of the substrate (a1) and the surrounding non-foamed resin sheet (B). BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 This is an enlarged perspective view schematically showing a corner portion of an example of a sheet with male-type molded hook and loop fastener of the present invention.

[0070] Figure 2 The sheet with male type molded hook and loop fastener of the present invention is schematically shown. Figure 1 A cross-sectional view of a portion of the cross section observed in the direction of the arrow (P).

[0071] Figure 3 The sheet with male type molded hook and loop fastener of the present invention is schematically shown. Figure 1 A cross-sectional view of a portion of the cross section observed in the direction of the arrow (Q).

[0072] Figure 4 This is an enlarged perspective view schematically showing another example of the sheet with male-type molded hook and loop fastener of the present invention.

[0073] Explanation of symbols

[0074] A: Male molded hook and loop fastener

[0075] B: Non-foamed resin sheet

[0076] a1: substrate

[0077] a2: Male hook element

[0078] a3: Ridge-like ridges

[0079] H: Height from the base plate to the top of the male hook element

[0080] E: The spacing between adjacent male hook elements in the column direction

[0081] C: Width of the base of the male hook element

[0082] S: Thickness of the male hook element at the top

[0083] D: The width of the male hook element from the base to the position of 2 / 3 of the height

[0084] W: Width of the male hook element at the top DETAILED DESCRIPTION

[0085] Next, the sheet with male type molded hook and loop fastener of the present invention will be described in detail based on the drawings. Figure 1 This is an enlarged perspective view schematically showing a corner portion of an example of a sheet with a male molded hook and loop fastener of the present invention [a case where the male hook element (a2) is an inverted J-shape], Figure 2 is from Figure 1A cross-sectional (side) view observed in the direction of arrow P, that is, a cross-sectional schematic view observed in a direction orthogonal to the row direction of the male hook element (a2), and further, Figure 3 is from Figure 1 A cross-sectional (side) view observed in the direction of arrow Q, i.e., a cross-sectional schematic view observed from the row direction of the male hook element (a2). Figure 4 This is an enlarged perspective view schematically showing another example of the sheet with male molded hook and loop fastener of the present invention (a case where the male hook element (a2) is Y-shaped).

[0086] The sheet with male type molded hook and loop fastener of the present invention is as follows Figure 1 As shown, it includes a male molded hook and loop fastener (A) and a non-foamed resin sheet (B) directly and integrally provided on the back side of the male molded hook and loop fastener.

[0087] Furthermore, the male molded hook and loop fastener (A) is as Figures 1-2 As shown, it comprises a substrate (a1) and a plurality (a large number) of inverted J-shaped male hook elements (a2) rising from the surface of the substrate, or as Figure 4 As shown, it includes a substrate (a1) and a plurality (a large number) of Y-shaped male hook elements (a2) rising from the surface of the substrate.

[0088] Furthermore, the male hooking element (a2) is formed from the surface of the substrate (a1) [preferably as Figures 1 to 4 The surface of the ridge-like protrusion (a3) ​​formed on the surface of the substrate (a1) as shown (in the present invention, the surface of the ridge-like protrusion (a3) ​​formed on the substrate surface is also referred to as the substrate surface)] stands up, and depending on the situation, it branches in the middle to become a Y-shape, and gradually becomes thinner from the root to the front end. Moreover, it is preferred as Figure 1 As shown, it bends in the same direction as the row direction of the male hook element (a2) in the middle, and the same is true in the case of bifurcation, such as Figure 4 As shown, the branched branches are bent in the same direction as the row direction of the male hooking elements (a2), and this direction is the direction in which the branched branches are separated, and the front end has a shape close to the substrate surface.

[0089] Furthermore, for the male hook element (a2), the height from the substrate (a1) to the top of the male hook element (a2) is preferably 0.2 to 1.5 mm, which is shorter than the monofilament hook element used in the existing fabric-type hook fastener, the T-shaped, arrow-shaped, and mushroom-shaped male hook elements generally used in the male molded hook fastener, or the existing inverted J-shaped male hook element, and thus has the advantage of small peeling noise. In the case of the inverted J-shaped hook element, the above-mentioned height is more preferably 0.55 to 1.2 mm, and in the case of the Y-shaped hook element, the above-mentioned height is more preferably 0.2 to 0.6 mm.

[0090] It should be noted that the woven hook and loop fastener as the main purpose is recorded in detail in the above-mentioned patent document 1, and the molded hook and loop fastener is also simply related to. However, in the patent document 1, there is almost no attention to the molded hook and loop fastener, and there is no design to reduce the peeling sound and where the molded hook and loop fastener should be studied. It is only recorded that the rubber layer is pasted on the back side by an adhesive. Only by operating in this way, the reduction effect of the peeling sound is not high. In addition, if the adhesive is repeatedly hooked and peeled off under the state of the rubber layer being attached to the back side of the fabric by an adhesive, it is easy to peel off at the adhesive layer, and the reduction effect of the peeling sound is also reduced. If a cross-linked adhesive is used as an adhesive, the adhesiveness is improved, but on the contrary, the hook and loop fastener can be hardened and become unsuitable for the purposes of requiring flexibility such as clothing.

[0091] As a specific method for manufacturing the male-shaped molded hook and loop fastener (A) used in the present invention, the following method can be used: the molten resin is flowed in a sheet form over the surface of a metal roller having a cavity in the shape of a plurality of male-shaped hook elements on the surface, and the molten resin is simultaneously pressed into the cavity. After cooling and solidifying, it is peeled off from the surface of the metal roller and pulled out from the cavity, thereby manufacturing a sheet having a plurality of male-shaped hook elements (a2) on the surface.

[0092] The manufacturing method for extracting from the cavity is described in detail and specifically, by successively superimposing a ring-shaped mold with a thickness of 0.2 to 0.5 mm and a cutout in the shape of a male hook element (a2) such as an inverted J-shape or a Y-shape engraved on the outer circumference and a metal ring without a cutout in such a shape engraved thereon, thereby preparing a mold roller having a large number of cavities with cutouts in the shape of male hook elements on its outer circumferential surface.

[0093] It should be noted that, in the case of a male hooking element such as an inverted J-shaped one that can be hooked in one direction, it is preferred to replace half of the annular mold with an annular mold having a thickness of 0.2 to 0.5 mm and having an inverted J-shaped cutout on the outer circumference that is bent in the opposite direction to the inverted J-shaped shape. In this case, the inverted J-shaped annular mold that is bent in the opposite direction and the inverted J-shaped annular mold that is bent in the positive direction can be alternately present, and can be alternately present in units of two or more pieces.

[0094] On the surface of such a metal roller, a plurality of cavities curved in the circumferential direction of the roller are arranged in a row in the circumferential direction, and such rows exist in parallel in the width direction of the metal roller. In the case of an inverted J-shaped shape, the curvature direction of the cavities is reversed in units of one row or in units of multiple rows. At this time, whether in the case of an inverted J-shaped shape or a Y-shaped shape, the cavities become narrower as they go from the metal roller surface to the front end, and gradually curve in the circumferential direction of the metal roller in the middle, with the front end facing the direction close to the metal roller surface.

[0095] As a specific method for allowing molten resin to flow over the surface of a metal roller and be molded, the resin melt is extruded into the gap between the metal roller and other drum rollers located in relative positions and pressed, thereby filling the cavity with the molten liquid and forming a sheet with uniform thickness on the roller surface. During the rotation of the mold roller, the molten liquid in the cavity is cooled and solidified by a refrigerant circulating in the roller. At the same time, the substrate (a1) of the obtained male molded fastener is stretched by a pressure roller whose gap is adjusted in such a way that the thickness is uniform. The cooled sheet is then peeled off from the surface of the mold roller, and the male hook element (a2) is extracted from the cavity.

[0096] Thus, a sheet-like article having a large number of male hook elements (a2) on the surface, i.e., a male molded hook and loop fastener (A) can be obtained. It should be noted that, in order to improve the bonding property with the non-foamed resin sheet (B) integrally provided on the back side of the substrate (a1), the surface of the drum roller may be provided with concavities and convexities in a manner that there are concavities and convexities on the back side of the substrate (a1).

[0097] As the resin constituting such a male-type molded hook and loop fastener (A), it is preferably set to be a resin mainly composed of the same type of elastomeric resin as that constituting the non-foamed resin sheet (B), from the perspective of adhesion with the non-foamed resin sheet (B) directly laminated integrally on the back side of the substrate (a1), and further from the perspective of reducing the peeling sound.

[0098] It should be noted that, in the present embodiment, the “main body” in “resin Y with X as the main body” means that the content (mass) of X in the resin contained in the resin Y is the largest, and the content of X in the resin Y can be 50% by mass or more, 80% by mass or more, 90% by mass or more, or 100% by mass.

[0099] In addition, in the present embodiment, "Z-type resin" means that the content (mass) of structural unit Z in the structural unit of the Z-type resin is the largest, and the content of structural unit Z in the Z-type resin can be 50 mass % or more, 80 mass % or more, 90 mass % or more, or 100 mass %. "Z-type elastomer" also has the same meaning as above.

[0100] In particular, since the peeling sound can be reduced, a preferred specific example is a resin mainly composed of a non-elastic polypropylene resin, a resin mainly composed of a polyester elastomer resin, and a resin mainly composed of a non-elastic polyamide resin. Among them, a resin mainly composed of a polyester elastomer resin is particularly preferred because it can most significantly exhibit the effect of the present invention.

[0101] Moreover, from the aspect of the moldability and hooking force of the male molded hook and loop fastener, the D-type durometer hardness of the resin constituting the male molded hook and loop fastener (A) is preferably in the range of 50 to 100 based on JIS K 7215. When the resin is soft beyond this range, the obtained male molded hook and loop fastener is prone to cause the substrate (a1) to fluctuate, the substrate (a1) to break in multiple places, or the hooking element to bend. On the contrary, when the resin is harder than this range, when it is extracted from the mold, the male hooking element is bent, the male hooking element is prone to cracking, or the obtained male molded hook and loop fastener is too hard, which is not suitable for the application field requiring flexibility. In addition, the ring hooking element of the ring hook and loop fastener of the hooking object is prone to breakage, which becomes a problem in terms of durability. It is more preferred that the above-mentioned durometer hardness is in the range of 50 to 75, and particularly preferably in the range of 60 to 70.

[0102] When a resin with a non-elastic polypropylene resin as the main body is used as the resin constituting the male molded hook and loop fastener (A), in addition to the reduction of the peeling sound, the male hook element (a2) of the obtained male molded hook and loop fastener is not easy to bend even if the hooking and peeling are repeated, and an excellent hooking force can be obtained. In addition, a small amount of resin that does not damage the performance of the polypropylene resin, such as a polyolefin resin such as polyethylene, can be mixed in such a resin with a polypropylene resin as the main body. Considering the aspect of easy extraction from the cavity, and considering the aspect of the bonding property of the non-foamed resin sheet (B) integrally arranged on the back, and then, in order to reduce the peeling sound itself, it is preferred to mix a small amount of olefin elastomer resin, such as ethylene-propylene rubber, styrene and hydrogenated conjugated diene block copolymers. As the amount of mixing, it is preferred that the above-mentioned D-type durometer hardness based on JIS K 7215 meets the range of 50 to 100, for example, the range of 2 to 15 mass % relative to the polypropylene resin.

[0103] Furthermore, various stabilizers, flame retardants, colorants, etc. may be added to the male-type molded surface fastener as required, and the amount thereof added is preferably 1 to 50% by mass relative to the resin constituting the male-type molded surface fastener.

[0104] In the case where the male type molded hook and loop fastener (A) is made of a resin mainly composed of a polyester elastomer resin, the polyester elastomer resin used for its molding is preferably a polyester elastomer resin obtained by copolymerizing polyoxytetramethylene glycol with a resin mainly repeating butylene terephthalate units, which is a resin that has the properties of an elastic polymer despite its high elastic modulus. Therefore, for the male type molded hook and loop fastener made of such a resin, the hook and loop fastener itself can reduce the peeling sound and has a high hooking force, and there are very few cases in which the male type hooking element (a2) is torn or the annular hooking element of the hooking object is broken due to hooking / peeling, which is the most preferred resin for the male type molded hook and loop fastener of the present invention.

[0105] In addition, as a polyester elastomer resin for male-type molded hook and loop fastener, it is preferred that the proportion of polybutylene terephthalate as a hard segment in the polyester elastomer resin is high and the proportion of polyoxytetramethylene glycol as a soft segment is low. As a result, it is preferred that the polyester elastomer resin has a D-type durometer hardness in the range of 50 to 100 based on JIS K 7215.

[0106] Regarding the polyester elastomer resin, polyester elastomer resins with various hardnesses ranging from high to low durometer hardness are commercially available, so it is sufficient to select a polyester elastomer resin that satisfies the above-mentioned durometer hardness from among these. If a polyester elastomer resin having such a durometer hardness is used, the obtained male molded hook and loop fastener can obtain the following advantages in addition to the reduction of the peeling sound: the male hook element (a2) is not easy to bend even if it is repeatedly hooked and peeled, and an excellent hooking force can be obtained, and further, when the obtained male molded hook and loop fastener is installed by sewing, it will not break from the sewing hole, etc.

[0107] In addition, within the range that does not damage the performance, other resins, such as polyester resins, can be mixed in small amounts with such a resin with polyester elastomer resin as the main body. In addition, various stabilizers, flame retardants, colorants, etc. can be added to the male type molded hook and loop fastener as needed. As its added amount, it is preferably 1 to 50% by mass relative to the resin constituting the male type molded hook and loop fastener. It should be noted that the durometer hardness described in the present invention is a value only including the resin before adding such additives.

[0108] Furthermore, in the present invention, when a resin mainly composed of polyamide resin is used as a resin for molding the male-type molded hook and loop fastener (A), examples of the polyamide resin used therein include nylon 6, nylon 66, nylon 11, nylon 12, and the like. Among them, nylon 6 has excellent softness and moldability. In addition, in addition to reducing the peeling sound, nylon 6 does not bend the hooking element (a2) when it is pulled out of the cavity during molding, and the hooking element (a2) does not bend due to hooking / peeling, and an excellent hooking force can be obtained, and the annular hooking element of the hooking object will not be broken, etc. Therefore, it can be cited as a preferred example.

[0109] Regarding these polyamide resins, resins with various hardnesses from high to low durometer hardnesses are also commercially available through modification, etc. In addition, a small amount of elastomer resin, such as 15% by mass or less, can be mixed within the range of 50 to 100 for the D-type durometer hardness based on JIS K 7215. Of course, in the case of this resin, various stabilizers, flame retardants, colorants, etc. can also be added as needed. As the amount thereof added, it is preferably 1 to 50% by mass relative to the resin constituting the male molded hook and loop fastener.

[0110] The male type molded hook and loop fastener (A) obtained from such a resin is as follows Figure 1 , Figure 2 , Figure 4As shown, the male hook element (a2) becomes thinner from the root to the front end (i.e., it is thick at the root and becomes thinner as it approaches the front end), and gradually bends in the middle, with the front end facing the direction close to the substrate (a1), and multiple male hook elements (a2) are arranged in a row in the same direction as the bending direction of the male hook elements (a2). In addition, in the case of an inverted J-shaped male hook element, the bending direction is opposite in units of one row or multiple rows.

[0111] In addition, in the present invention, it is preferred that the cross-sectional shape of the top of the male hook element (a2) is a shape in which the width of the male hook element (a2) is greater than the thickness of the male hook element. Specifically, Figure 2 and Figure 3 The width (W) of the male hook element at the top of the male hook element shown is greater than the thickness (S) of the male hook element, which means W>S. By satisfying this condition, as described above, when the male molded Velcro is molded (A), it is possible to prevent the male hook element (a2) from breaking when being pulled out of the cavity or to prevent cracks from occurring in the bent portion of the hook element, thereby preventing the loop fibers of the hooked object from being cut.

[0112] In the present invention, the preferred size of the male hook element (a2) is based on Figure 2 and Figure 3 The height of the male hook element (a2) [i.e., the height from the substrate (a1) to the top of the male hook element (a2): H] is 0.2 to 1.5 mm, and when the male hook element (a2) is an inverted J-shape, H is more preferably 0.55 to 1.2 mm, and when it is a Y-shape, H is more preferably 0.2 to 0.6 mm, and the width (C) of the root is 0.2 to 1.0 mm, more preferably 0.25 to 0.8 mm, and the ratio C / H is 0.6 to 2.5, more preferably 0.65 to 2.0. Thus, from the perspective of preventing the hook element (a2) from tipping over, from the perspective of the hooking force, and from the perspective of reducing the peeling sound, it is preferred that the root of the hook element is thick and the tip is thin, and the height of the hook element (a2) is low.

[0113] In addition, when the male hook element (a2) is an inverted J-shape, the width ( Figure 2 The D) shown is 0.15 to 0.4 mm, and the male hook element (a2) gradually bends from the root to about 1 / 2 to 3 / 4 of the height of the hook element.

[0114] On the other hand, when the male hook element (a2) is Y-shaped, it is preferably bifurcated near 60 to 80% of the height from the substrate (a1) to H, and each branch of the bifurcation extends in a direction away from the opposite branch of the bifurcation, and at the same time bends in a direction parallel to the substrate (a1), and the front end bends until it is close to the substrate (a1).

[0115] In addition, as Figure 3 The width (W) of the male hook element at the top of the male hook element (a2) shown can be an inverted J-shape or a Y-shape, and is preferably 0.15 to 0.4 mm. The width of the male hook element (a2) can be the same from the root to the front end of the male hook element, or can be tapered as it reaches the front end. However, when the above-mentioned annular mold is used, the width of the male hook element (a2) must be substantially the same from the root to the front end of the male hook element (a2). In addition, the thickness (S) of the top of the male hook element (a2) is preferably 0.1 to 0.3 mm, that is, a value smaller than the above-mentioned W.

[0116] In view of the flexibility and strength to follow the curved surface, the thickness of the substrate (a1) on which the male hook element (a2) stands (excluding the ridge-like protrusion (a3)) is preferably in the range of 0.15 to 0.30 mm. In addition, when the thickness is thicker than this range, it is difficult for the molten resin to penetrate into the front end of the cavity during molding, and it is difficult to obtain a male hook element (a2) with a complete shape. More preferably, it is in the range of 0.2 to 0.28 mm.

[0117] The density of the male hooking elements (a2) on the substrate (a1) is preferably 60 to 160 pieces / cm 2 , particularly preferably 80 to 140 pcs / cm 2 range.

[0118] Moreover, in the male molded hook and loop fastener (A), such male hook elements (a2) are as follows: Figure 1 , Figure 4 As shown, a plurality of male hook elements (a2) are arranged in a row in the same direction as the bending direction of the male hook elements (a2), as shown in FIG. Figure 2 As shown, the interval (E) between adjacent male hook elements in the row direction is preferably 1.2 to 2.2 mm, that is, one male hook element exists in a row length of 1.2 to 2.2 mm, and more preferably one male hook element exists in a row length of 1.3 to 1.8 mm.

[0119] In addition, the interval between adjacent hook element rows (the interval between adjacent rows including one hook element row) is preferably in the range of 0.4 to 1.0 mm, that is, one row of male hook elements exists on the substrate (a1) with a width of 0.4 to 1.0 mm. More preferably, one row of male hook elements exists with a width of 0.5 to 0.8 mm.

[0120] Furthermore, as described above, the male hook element (a2) preferably stands up from the surface of the ridge-like protrusion (a3) ​​formed on the surface of the substrate (a1). To achieve this, a method of making the diameter of the ring mold for the hook element slightly smaller than the diameter of the ring mold without the hook element, a method of shifting the center of the ring mold, etc. In this case, the height of the ridge-like protrusion (a3) ​​is preferably 2 to 20% of the height (H) of the male hook element.

[0121] It should be noted that in the present invention, it is not necessary for all male hook elements (a2) to stand up from the surface of the ridge-like protrusion (a3) ​​formed on the surface of the substrate. Even if a portion of the male hook elements (a2) stand up from the surface of the ridge-like protrusion (a3), a corresponding effect can be obtained. It is preferred that more than 30% of all male hook elements stand up from the surface of the ridge-like protrusion (a3).

[0122] A non-foaming resin sheet (B) is integrally provided on the back of such a male molded hook and loop fastener (A). Moreover, the non-foaming resin sheet (B) is not integrally provided on the back of the male molded hook and loop fastener (A) by an adhesive, a bonding agent, etc., but is directly laminated integrally.

[0123] As a preferred method for obtaining a sheet in which a non-foamed resin sheet (B) is directly and integrally laminated on the back surface of a male molded surface fastener (A), there are the following three methods.

[0124] [Method 1]

[0125] A method for manufacturing a sheet with a male-shaped hook and loop fastener, the method comprising:

[0126] A male molded hook and loop fastener (A) satisfying the following conditions i) to iii) is disposed in a recessed portion in a mold in such a manner that the male hook element (a2) becomes the bottom surface side of the recessed portion, and in this state, a molten non-foamed resin satisfying the following condition iii) is injected into the mold and removed from the mold after cooling.

[0127] i) The male molded hook and loop fastener (A) is formed by a substrate (a1) made of resin, and a plurality (a large number) of male hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1);

[0128] ii) the male hook element (a2) is bent in the middle in the same direction as the row direction of the male hook element (a2), the front end of the male hook element (a2) is close to the base plate (a1), and the male hook element (a2) is formed of the same resin as the resin constituting the base plate (a1);

[0129] iii) the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of any resin selected from polypropylene resin, polyester elastomer resin, and polyamide resin, and the non-foamed resin is a resin mainly composed of an elastomer resin of the same type as the resin constituting the male molded hook and loop fastener (A);

[0130] [Method 2]

[0131] A method for manufacturing a sheet with a male-shaped molded hook and loop fastener, wherein the sheet with a male-shaped molded hook and loop fastener has a non-foamed resin sheet (B) on the back of the male-shaped molded hook and loop fastener (A), the method comprising:

[0132] A molten resin satisfying the following conditions III) is passed through the surface of a metal roller satisfying the following conditions I) and II) and the molten resin is pressed into the cavity. A sheet of a non-foamed resin satisfying the following conditions III) is superimposed on the surface of the molten resin on the metal roller and pressure-bonded. After the molten resin is cooled and solidified in this state, it is peeled off from the surface of the metal roller and extracted from the cavity.

[0133] I) The metal roller is formed by stacking thin annular molds with a plurality (large number) of cutouts in the shape of male hook elements engraved on the outer circumference;

[0134] II) On the surface of the metal roller, a plurality of (a large number of) male hook element cavities based on the cutouts are arranged in a row in the circumferential direction of the roller, each cavity is bent in the middle in the row direction of the cavity, and the front end of the cavity is close to the surface of the metal roller;

[0135] III) The resin constituting the melt is a resin mainly composed of any resin selected from polypropylene resin, polyester elastomer resin and polyamide resin, and the non-foaming resin is a resin mainly composed of an elastomer resin of the same type as the resin constituting the melt.

[0136] [Method 3]

[0137] A method for manufacturing a sheet with a male-shaped molded hook and loop fastener, wherein the sheet with a male-shaped molded hook and loop fastener has a non-foamed resin sheet (B) on the back of the male-shaped molded hook and loop fastener (A), the method comprising:

[0138] A sheet (B) in a molten state made of a non-foamed resin satisfying the following condition iii) is superimposed on the back of a male molded hook and loop fastener (A) satisfying the following conditions i) to iii) and pressure-bonded, and then cooled and solidified.

[0139] i) The male molded hook and loop fastener (A) is formed by a substrate (a1) made of resin, and a plurality (a large number) of male hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1);

[0140] ii) the male hook element (a2) is bent in the middle in the same direction as the row direction of the male hook element, the front end of the male hook element (a2) is close to the base plate (a1), and the male hook element (a2) is formed of the same resin as the resin constituting the base plate (a1);

[0141] iii) The resin constituting the non-foamed resin sheet (B) is mainly composed of an elastomer resin of the same type as the resin constituting the male type molded fastener (A), and the hardness of the non-foamed resin is lower than that of the resin constituting the male type molded fastener (A).

[0142] Specifically, the first method is a method in which a pre-formed male-type molded hook and loop fastener (A) is placed in a mold, and in this state, a non-foamed resin sheet (B) is injected into the mold with resin and molded, thereby directly and integrally stacking the non-foamed resin sheet (B) on the back side of the male-type molded hook and loop fastener (A). On the other hand, the second method is a method in which a pre-formed sheet-shaped non-foamed resin sheet (B) is superimposed and crimped on the back side of the substrate (a1) of the obtained male-type molded hook and loop fastener (A) when the male-type molded hook and loop fastener (A) is molded, before the substrate (a1) of the obtained male-type molded hook and loop fastener (A) is solidified, thereby directly and integrally stacking the non-foamed resin sheet (B) on the back side of the male-type molded hook and loop fastener (A). Furthermore, the third method is a method in which the non-foamed resin sheet (B) is superimposed and crimped on the back side of the pre-formed male-type molded hook and loop fastener (A) when the non-foamed resin sheet (B) is in a molten state, thereby directly and integrally stacking the non-foamed resin sheet (B) on the back side of the male-type molded hook and loop fastener (A).

[0143] In addition to the above-mentioned methods 1 to 3, for example, there can also be cited: a method in which the back side of the substrate (a1) of the pre-formed male-type molded fastener (A) and the joined side of the non-foamed resin sheet (B) are respectively heated to near the melting temperature, and then the heated surfaces of the male-type molded fastener (A) and the non-foamed resin sheet (B) are superimposed to be crimped and integrated into one; a method in which when the male-type molded fastener (A) is molded, the molten resin for the non-foamed resin sheet (B) is extruded in sheet form and superimposed on the back side of the substrate (a1) before curing to thereby crimp and integrate them into one, etc. The above-mentioned methods 1 to 3, especially the 2nd and 3rd methods, are preferred because they can easily obtain a homogeneous layered and integrated object.

[0144] However, if we consider that in the case of the second method, when the male molded hook and loop fastener (A) is molded, it is sometimes difficult to press the resin into the front end of the cavity due to the presence of the non-foamed resin sheet (B) crimped to the back side, then the above-mentioned third method is most preferred.

[0145] In the case of the above-mentioned first method, the back side of the substrate (a1) of the male molded Velcro (A) melts due to the heat from the molten liquid of the non-foamed resin, and has excellent compatibility with the non-foamed resin liquid. Therefore, it is melt-bonded on the surface of the non-foamed resin sheet (B) and firmly stacked as a whole.

[0146] In addition, in the case of the above-mentioned second method, the surface of the non-foamed resin sheet (B) on the side in contact with the male molded hook and loop fastener (A) is melted due to the heat from the molten liquid of the resin for the male molded hook and loop fastener (A), and has excellent compatibility with the molten liquid of the resin for the male molded hook and loop fastener (A), so it is melt-bonded and firmly stacked as a whole.

[0147] In addition, in the case of the above-mentioned third method, the surface of the male molded Velcro (A) on the side in contact with the non-foamed resin sheet (B) is melted or softened due to the heat from the molten liquid of the resin used for the non-foamed resin sheet (B), and has excellent compatibility with the molten liquid of the non-foamed resin sheet (B), and therefore, it is melt-bonded with the non-foamed resin sheet (B) and firmly laminated as a whole.

[0148] In the case of the first method, the molten liquid of the non-foaming resin easily intrudes into the male hook element surface of the male molded hook and loop fastener (A), and as a result, the male hook element (a2) is easily buried in the non-foaming resin, and countermeasures need to be taken. In contrast, in the case of the second and third methods, such countermeasures do not need to be taken. Therefore, from the perspective of productivity, the second and third methods are considered to be more excellent. On the other hand, in the case of the first method, there are the following advantages: it is easy to manufacture a product with better quietness such as the male molded hook and loop fastener (A) sinking into the non-foaming resin sheet (B); and the thickness and shape of the non-foaming resin sheet (B) can be freely changed.

[0149] In addition, the resin used for the non-foamed resin sheet (B) and the resin used for the male-type molded fastener (A) must be resins that meet the following conditions, that is, the resin constituting the non-foamed resin sheet (B) is a resin with an elastomeric resin of the same type as the resin constituting the male-type molded fastener (A) as the main body, and the hardness of the resin constituting the non-foamed resin sheet (B) is lower than that of the resin constituting the male-type molded fastener (A).

[0150] It should be noted that, as a specific example of an elastomeric resin of the same type as the resin constituting the male-type molded hook and loop fastener (A), when the resin constituting the male-type molded hook and loop fastener (A) is a resin with a non-elastic polypropylene resin as the main body, the resin constituting the non-foamed resin sheet (B) may include a resin with an olefin-type elastomer resin as the main body, and when the resin constituting the male-type molded hook and loop fastener (A) is a resin with a polyester-type elastomer resin as the main body, the resin constituting the non-foamed resin sheet (B) may include a resin with a polyester-type elastomer resin as the main body, and when the resin constituting the male-type molded hook and loop fastener (A) is a resin with a non-elastic polyamide resin such as nylon 6 as the main body, the resin constituting the non-foamed resin sheet (B) may include a resin with a polyamide-type elastomer resin as the main body.

[0151] In the case of these combinations, the following advantages can be obtained: excellent quietness, excellent peeling resistance of the male molded hook and loop fastener (A) and the non-foamed resin sheet (B), and excellent flexibility of the integrally provided sheet after bonding.

[0152] In particular, from the perspective of improving the effect of reducing the peeling sound, it is preferred that the D-type durometer hardness of the resin constituting the non-foamed resin sheet (B) is in the range of 10 to 70 based on JIS K 7215, and the difference in hardness between the D-type durometer hardness of the resin constituting the male molded surface fastener and the resin constituting the male molded surface fastener and the resin constituting the non-foamed resin sheet (B) is in the range of 20 to 45, and the difference in hardness between the D-type durometer hardness of the resin constituting the male molded surface fastener and the resin constituting the male molded surface fastener and the resin constituting the non-foamed resin sheet (B) is in the range of 25 to 50 based on JIS K 7215.

[0153] Next, the combination of the above-mentioned resins is described. First, the combination of the above-mentioned polypropylene resin and olefin elastomer resin is described. In the case where the resin constituting the male molded hook and loop fastener (A) is a resin with polypropylene resin as the main body, as the resin constituting the non-foamed resin sheet (B), a resin with olefin elastomer resin as the main body is used.

[0154] As olefin elastomers, there can be mentioned: resins with polyolefins such as polypropylene and polyethylene as hard segment components and olefin rubbers such as ethylene-propylene rubber as soft segment components, block copolymers with polystyrene as hard segment components and hydrogenated polyolefins of conjugated dienes as soft segment components, etc. By changing the ratio of the hard segment component to the soft segment component, the above hardness can be changed. In order to achieve the above hardness, polypropylene and polystyrene resins can be mixed with olefin elastomer resins. As the mixed mass ratio of olefin elastomer resins and polypropylene resins or polystyrene resins, the range of 50:50 to 100:0 is preferably considered from the aspects of quietness, sewing properties, and softness. In addition, it is preferred to add an appropriate amount of inorganic microparticles such as barium sulfate and carbon black to the olefin elastomer resin constituting the non-foamed sheet (B). The preferred amount refers to the range of 10 to 80% by mass, and more preferably 20 to 50% by mass.

[0155] The following combinations of polyester elastomer resins are described. It is believed that since they are the same polyester elastomer resin, when manufacturing the male-type molded hook and loop fastener (A), if the thickness of the substrate (a1) is increased, a material with the same thickness as the material in which a non-foamed resin sheet is integrally arranged on the back side can be obtained, thereby eliminating the labor of laminating and integrally arranging the non-foamed resin sheet on the back side. This is reasonable, but the combination of resins with the same hardness cannot realize the present invention.

[0156] That is, the polyester elastomer resin constituting the male type molding hook and loop fastener and the polyester elastomer resin constituting the non-foamed resin sheet (B) on the back side must use resins with different hardnesses as described above. That is to say, in the case of using the polyester elastomer resin constituting the male type molding hook and loop fastener (A) to manufacture the non-foamed resin sheet (B) on the back side, it is impossible to obtain a satisfactory reduction in the peeling sound, and in the case of manufacturing the male type molding hook and loop fastener (A) by the polyester elastomer resin constituting the non-foamed resin sheet (B) on the back side, the moldability is poor, the substrate (a1) has ups and downs, cracks, and it is impossible to obtain a hook and loop fastener with sufficient hooking force. In addition, as described later, it is preferred to add an appropriate amount of inorganic particles such as barium sulfate and carbon black to the resin with the polyester elastomer resin as the main body for the non-foamed resin sheet (B), and the appropriate amount refers to 10 to 80 mass %, more preferably in the range of 20 to 50%. When such a resin is used for the male type molding hook and loop fastener (A), the resin is particularly difficult to invade the front end of the cavity.

[0157] Regarding the polyester elastomer resin used for the non-foamed resin sheet (B), it is preferred that the proportion of polybutylene terephthalate as a hard segment in the polyester elastomer resin is small and the proportion of polyoxytetramethylene glycol as a soft segment is high. As a result, it is preferred that the durometer hardness (type D) based on JIS K 7215 satisfies the range of 10 to 70.

[0158] As for such polyester elastomer resin, a polyester elastomer resin satisfying the above-mentioned durometer hardness can be selected from commercially available products. If a polyester elastomer resin having such a durometer hardness is used, in addition to reducing the peeling sound, the following advantages can be obtained: when the hook and loop fastener is installed by sewing, it will not break from the sewing hole due to the presence of the high-hardness substrate (a1). In addition, a small amount of other resins, such as polyester resin, can be mixed into such a resin mainly composed of a polyester elastomer resin within a range that does not impair the performance and does not exceed the above-mentioned hardness range.

[0159] The following combination of polyamide resin and polyamide elastomer resin is explained. The polyamide elastomer resin is an elastomer having polyamide blocks such as nylon 6 block, nylon 11 block, nylon 12 block as hard segment components and polyethers such as polyethylene glycol and polytetramethylene glycol, aliphatic polyesters, etc. as soft segment components. By changing the structural units of the hard segment components and the soft segment components, and then by changing the ratio, resins of various hardness can be obtained. These resins are sold on the market, and the resin that meets the above hardness range can be selected from them. In addition, within the range of the above hardness range, a non-elastic polyamide resin can be mixed with the resin having the polyamide elastomer resin as the main body.

[0160] Note that fillers such as barium sulfate powder and calcium carbonate powder, various stabilizers, flame retardants, colorants, etc. may be added to the resin constituting the non-foamed resin sheet (B) in appropriate amounts. The appropriate amount means within the range of 10 to 80% by mass, more preferably 20 to 50%.

[0161] In such the present invention, it is preferred that Figure 1 to Figure 3 As shown in FIG. 1 , when the substrate (a1) is directly bonded not only on the back side but also on the side side thereof with the resin constituting the non-foamed resin sheet (B), it is more preferable as shown in FIG. Figure 1 to Figure 3 As shown, the substrate (a1) of the male molded fastener (A) is located below the surface of the non-foamed resin sheet (B) (that is, the substrate (a1) is sunken in the non-foamed resin sheet (B)).

[0162] By making the side of the substrate (a1) also directly bonded to the resin constituting the non-foaming resin sheet (B), the sound generated when the male molded hook and loop fastener (A) is peeled off can be more effectively reduced. Moreover, by making the substrate (a1) located below the surface of the non-foaming resin sheet (B), the sound can be more effectively reduced. It should be noted that in order to make the back and side of the substrate (a1) directly bonded to the resin constituting the non-foaming resin sheet (B), it is preferably manufactured using the above-mentioned first method.

[0163] Specifically, in the above-mentioned inlay molding method, the following method is preferably adopted: the male molded Velcro (A) is set in a mold, and in this state, the non-foaming resin liquid for the non-foaming resin sheet (B) is injected into the mold, so that the male hook element (a2) is embedded in the recess in the mold, and the substrate (a1) is exposed from the recess.

[0164] Furthermore, in order to position the substrate (a1) below the surface of the non-foamed resin sheet (B), the male molded hook and loop fastener (A) may be placed in the mold so that the entire substrate (a1) is exposed from the inner wall of the mold toward the inside of the mold.

[0165] It should be noted that in the case of the above-mentioned first method, as mentioned above, sometimes when the non-foaming resin liquid is injected into the mold, the resin liquid flows into the male hook element surface side of the male molded Velcro (A) set in the mold, and the male hook element (a2) is covered with the resin, and the hooking force disappears. In order to prevent this situation, it is preferred to pre-coat the male hook element surface side with a covering material such as silicone rubber, water-soluble resin, film, non-woven fabric, etc. before setting it in the mold.

[0166] When the side surface of the substrate (a1) is also directly bonded to the resin constituting the non-foaming resin sheet (B), particularly when the side surface of the substrate (a1) is also directly bonded to the resin constituting the non-foaming resin sheet (B) and the substrate (a1) is located below the surface of the non-foaming resin sheet (B), it is difficult to set the male hook fastener in the mold, and the resin liquid easily flows into the male hook element surface side of the male molded hook fastener (A) set in the mold, so it is preferred to cover the hook element surface with a coating material in advance. In addition, in this case, it is preferred that the coating material does not cover the back and side surfaces of the substrate (a1).

[0167] In addition, when the male hook element surface side is covered with a covering material, it is necessary to remove the covering material covering the male hook element surface of the male molded hook fastener (A) after the molded product is taken out of the mold. In addition, a method can be used in which the entire surface of the male hook element surface side is not covered, but only the periphery of the hook element group is covered with silicone rubber, water-soluble resin, etc.

[0168] In addition, in the present invention, the thickness of the non-foamed resin sheet (B) is preferably 0.2 to 4 mm, and the thickness of the non-foamed resin sheet (B) is greater than the thickness of the substrate (a1). In such a case, it is preferred from the perspective of being able to efficiently silence the sound during peeling and having the quiet male-shaped Velcro sheet with both softness, curved surface tracking and strength. It is more preferred that the thickness of the non-foamed resin sheet (B) is 0.3 to 2.5 mm and is 1.2 to 15 times the thickness of the substrate (a1). It should be noted that the thickness of the non-foamed resin sheet (B) described here refers to the thickness of the non-foamed resin sheet (B) alone, excluding the thickness of the male-shaped Velcro (A) at the portion where the male-shaped Velcro (A) is integrally provided.

[0169] Furthermore, the resin sheet (B) must be a non-foamed resin sheet, and in the case of a porous state after foaming, the effect of reducing the peeling sound is hardly exhibited.

[0170] In order to connect the resin sheet (B) with the hook and loop fastener of the present invention to metal parts, holes for inserting metal parts may be opened in the non-foamed resin sheet (B), and in order to facilitate installation by sewing, the back side may be integrally provided with cloth.

[0171] As the female Velcro that serves as the hooking object of the sheet of the sound-absorbing male molded Velcro of the present invention, an existing Velcro with a ring-type hooking element can be used. It is particularly preferred to use a sound-absorbing Velcro having a sound-absorbing elastomeric resin layer installed on the back of the Velcro. The sound-absorbing effect can be further improved by the synergistic effect of the sound-absorbing effect of the sheet of the sound-absorbing male molded Velcro of the present invention and the female Velcro.

[0172] The sheet with the silent male-shaped Velcro of the present invention can be used in all fields where male-shaped Velcro is used, in particular, it can be used in fields requiring quietness, such as clothes for infants / infants, military clothes, shoes, helmets, tents, military strapping tools, other sports gloves, etc.

[0173] As specific installation methods, various methods can be used: a method of fixing the back side of the sheet of the present invention to the installation object by means of an adhesive or bonding agent; a method of fixing the sheet to the installation object by sewing; and a method of fixing the sheet to the object by providing a hole penetrating in the sheet width direction at the end of the sheet of the present invention, installing a metal part on the hole, and thereby fixing the sheet to the object. In particular, the sheet of the silent male-shaped Velcro of the present invention has excellent softness due to the presence of a sheet containing an elastomer resin on the back side, and also has excellent hand feel due to the male-shaped hooking element on the surface being a small element. Therefore, it is suitable for being installed on clothes, etc. by sewing using this property.

[0174] As described above, when the male molded fastener (A) on the surface side and the non-foamed resin sheet (B) on the back side are both polyester elastomer resins, it is difficult to break from the sewing holes and is suitable for applications such as attaching to clothes, tools, etc. by sewing.

[0175] Example

[0176] Hereinafter, the present invention will be specifically described by way of embodiments. It should be noted that the hooking force of the male molded hook and loop fastener is measured according to the method of JIS L3416 for the initial hooking force and the hooking force at the moment of repeated peeling and hooking 1000 times. As the annular hooking element that becomes the hooking object at this time, ALTECO is used as an adhesive, and a sheet of 2 mm in thickness made of polyester elastomer resin (Hytrel 3046 made by Toray DuPont Co., Ltd.) is integrally arranged on the back side of a woven hook and loop fastener made of polyethylene terephthalate (MAGICTAPE (registered trademark) B9750Y.00 made by Leli Adhesive Fastener Co., Ltd.) and used. Then, the loop hook and loop fastener is replaced with a new loop hook and loop fastener when the hook and loop fastener are peeled off 50 times each.

[0177] In addition, the size of the stripping sound at this moment was also measured. The stripping sound of the Velcro at this time was measured based on JIS Z8731. Specifically, a noise meter (Rion Co., Ltd., "NA-20") was used, which was set to frequency characteristics A and dynamic characteristics AST. As a hooking object, a sheet of a ring Velcro with a size of 30mm × 140mm in length and a size of 20mm × 80mm in length was used, which was formed by integrally setting the above-mentioned polyester elastomer resin sheet on the back of a woven Velcro with a ring-shaped hooking element of 20mm × 80mm in length by an adhesive. Then, the distance between the Velcro and the noise meter for measurement was set to 10cm, and the indicated value of the noise meter during stripping was read. The size of the sound during stripping is expressed as dB (decibel). In human hearing, a difference of 10dB is felt, i.e., a volume difference of about 2 times. This stripping sound test is also replaced with a new Velcro when the hooking and stripping are repeated 50 times.

[0178] Example 1

[0179] [Manufacturing of male molded hook and loop fastener (A)]

[0180] As a mold, a ring-shaped mold with a thickness of 0.20 mm and a diameter of 211.8 mm and a shape of a hook-type hooking element (inverted J-shaped hooking element) engraved on the outer circumference, a metal ring with a thickness of 0.30 mm and a diameter of 212 mm and a flat outer circumferential surface without such a shape engraved thereon, a ring-shaped mold with a thickness of 0.20 mm and a diameter of 211.8 mm and a shape of a hook-type hooking element engraved on the outer circumference in the opposite direction to the above-mentioned hook-type hooking element shape, and a metal ring with a thickness of 0.30 mm and a diameter of 212 mm and a flat outer circumferential surface without such a shape engraved thereon are overlapped in sequence, thereby preparing a mold roller with a width of 120 mm and having a large number of cavities in the shape of hook-type hooking elements and cavities in the shape of hook-type hooking elements facing in the opposite direction on its outer circumferential surface.

[0181] A melt of a thermoplastic polyester elastomer resin (Hytrel 6347 manufactured by Toray DuPont Co., Ltd.: durometer hardness (type D): 63) is extruded into the gap between the above-mentioned mold roller and other drum rollers located in relative positions, and pressed, thereby filling the cavity with the resin and forming a sheet with uniform thickness on the roller surface. The resin in the cavity is cooled by water that circulates during the rotation of the mold roller, and then stretched by a nip roller whose gap has been adjusted so that the substrate thickness becomes 0.20 mm, and cooled and solidified. The obtained sheet is peeled off from the surface of the mold roller to produce a male molded hook and loop fastener (A).

[0182] Only the male hook element side surface of the male molded surface fastener (A) thus obtained was covered with silicone rubber, and cut into a size of 80 mm long and 20 mm wide in the male hook element row direction.

[0183] Next, the male molded Velcro (A) is arranged in the recess in the mold in such a manner that the male hook element group is on the bottom side of the recess and the substrate of the Velcro is exposed from the recess and then protrudes from the inner wall surface of the mold. In this state, a molten liquid composed of 70 parts by mass of a thermoplastic polyester elastomer resin (Hytrel 3046 manufactured by Toray DuPont Co., Ltd.: durometer hardness (type D): 27) and 30 parts by mass of barium sulfate is injected into the mold, taken out from the mold after cooling, and then the silicone rubber covering the surface of the Velcro is removed.

[0184] The obtained sheet with male-shaped hook and loop fastener has a large number of Figure 1 The shape shown, i.e., the inverted J-shaped male molded Velcro gradually tapers from the root to the front end, and gradually bends in the middle, with the front end facing a male hook element (a2) slightly closer to the substrate. In addition, multiple male hook elements (a2) are arranged in a row in the same direction as the bending direction of the inverted J-shaped male hook element, and have a shape in which the bending direction is in opposite directions per row.

[0185] Moreover, the shape of the male hook element (a2) of the male molded hook and loop fastener is as follows: Figure 1 The shape shown in the figure has a height (H) of 0.90 mm from the substrate surface, and the lower end of the front end of the male hook element is close to the substrate by a distance corresponding to 5% of the height (H) of the male hook element relative to the height of the lower end of the top of the male hook element. In addition, the width (W) of the male hook element at the top is 0.20 mm, the thickness (S) of the male hook element at the top is 0.09 mm, the width (C) of the hook element root is 0.76 mm, the male hook element (a2) gradually bends from the root to about 2 / 3 of the height of the hook element, and the density of the male hook element (a2) is 136 pieces / cm 2 The thickness of the substrate is 0.20 mm, the interval (E) between adjacent male hook elements in the column direction is 1.50 mm, and the interval between adjacent columns of hook elements is 0.50 mm.

[0186] In addition, there are Figures 1 to 3 The illustrated embodiment shows a continuous ridge-like protrusion with a height of 0.10 mm in the row direction of the male hook elements, from which the male hook elements stand.

[0187] And, the thickness of the sheet (B) made of soft polyester elastomer resin and barium sulfate that is integrally arranged on the surface of such male type molding hook and loop fastener is 2.2mm, male type molding hook and loop fastener (A) is directly laminated integrally on the surface of this sheet (B) with male type hook and loop element surface as the outside, around male type molding hook and loop fastener (A), in the mode around hook and loop fastener (A), there is the area of ​​wide 5mm (corresponding to the above-mentioned 20mm length direction of hook and loop fastener) that hook and loop fastener is not integrally arranged and one side is exposed, and wide 5mm and 55mm (corresponding to the above-mentioned wide 40mm area) area. And, the back side and the side of substrate are all directly bonded with the resin that constitutes sheet (B), and the surface of hook and loop fastener (A) is the positional relationship that sinks than the surface of sheet. The hook and loop force of the sheet of band male type molding hook and loop fastener obtained in this way and the maximum sound pressure (dB) of stripping sound between frequency 2~20kHz are measured. Its result is shown in table 1.

[0188] Comparative Example 1

[0189] In the above-mentioned Example 1, the non-foamed resin sheet (B) was not integrally provided on the back of the male molded hook and loop fastener (A), but the maximum sound pressure (dB) of the hook force and the peeling sound during peeling at a frequency of 2 to 20 kHz was measured in the state of the male molded hook and loop fastener. The results are recorded in Table 1.

[0190] Comparative Example 2

[0191] In the above-mentioned Example 1, as the resin injected into the mold provided with the male type molded hook and loop fastener (A), a resin formed by 70 parts by mass of a thermoplastic polyester elastomer resin (Hytrel 6347 manufactured by Toray·DuPont Co., Ltd.: durometer hardness is 63) and 30 parts by mass of barium sulfate, which is the same as the resin used in the manufacture of the male type molded hook and loop fastener (A), was used. In addition, the same method as in Example 1 was used to obtain a sheet with a male type molded hook and loop fastener. Then, the maximum sound pressure (dB) of the hooking force and the peeling sound at a frequency of 2 to 20 kHz was measured in the same manner as in Example 1. The results are recorded in Table 1.

[0192] Comparative Example 3

[0193] In the above-mentioned Example 1, as the resin used in the manufacture of the male molded Velcro (A), a thermoplastic polyester elastomer resin (Hytrel 3046 manufactured by Toray DuPont Co., Ltd.: durometer hardness of 27) which is the same as that of the sheet integrally arranged on the back is used, and the same procedure as in Example 1 is performed except for this. However, during the molding stage of the male molded Velcro (A), when peeling from the roller surface, damage and undulation occurred in the substrate of the Velcro (A). Then, using the undamaged part, the sheet (B) was integrally arranged on the back by the same method as in Example 1, and a sheet with a male molded Velcro was obtained. Then, the maximum sound pressure (dB) of the hooking force and the peeling sound between the frequencies of 2 and 20 kHz was measured in the same manner as in Example 1. The results are collectively recorded in Table 1.

[0194] Comparative Example 4

[0195] In the above-mentioned Example 1, an instant adhesive (cyanoacrylate) was used as an adhesive, and a sheet of 2.2 mm in thickness made of 70 parts by mass of a thermoplastic polyester elastomer resin (Hytrel 3046 manufactured by Toray·DuPont Co., Ltd.: durometer hardness (type D): 27) and 30 parts by mass of barium sulfate was adhered to the back of the male molded hook and loop fastener (A). Then, the maximum sound pressure (dB) of the hooking force and the peeling sound at a frequency of 2 to 20 kHz was measured in the same manner as in Example 1. The results are recorded in Table 1.

[0196] [Table 1]

[0197]

[0198] It is clear from Table 1 above that the sheet with male-shaped Velcro of Example 1 has very excellent hooking force both at the initial moment and after repeated hooking / peeling 100 times. In addition, the peeling sound at this time is also very quiet. When peeled slowly, it is a low and steady sound like the continuous bursting of bubbles on the water surface, which is particularly quiet compared with the peeling sound of existing Velcro.

[0199] Furthermore, the sheet with the male-shaped hook and loop fastener was attached to the surface of a cotton fabric by sewing, and even when the sheet was hooked / peeled off with the loop fastener 2000 times, there was no case of the sheet with the male-shaped hook and loop fastener breaking from the sewing holes.

[0200] On the other hand, in the case of the male molded Velcro of Comparative Example 1, the hooking force is as excellent as that of Example 1, but regarding the peeling sound, although it is improved to a certain extent compared with fabric Velcro, etc., the peeling sound is much louder than that of Example 1, and the sound itself is also the same as the peeling sound of existing Velcro, which sounds uncomfortable and squeaking.

[0201] In addition, in the case of the sheet with male-shaped Velcro in Comparative Example 2, the hooking force is as excellent as that in Example 1, but the peeling sound is slightly improved compared with Comparative Example 1, but it is far from a satisfactory level and is not as pleasant as the sound in Example 1.

[0202] Furthermore, the initial hooking force of Comparative Example 3 is much inferior to that of Example 1, and does not have the basic performance required of a general-purpose hook and loop fastener.

[0203] In addition, there is no problem with the hooking force of Comparative Example 4, but the sheet with male-shaped molded Velcro is harder than that of Example 1 and is not suitable for applications requiring softness. In addition, the same is true for the peeling sound. During the repeated hooking and peeling process, the adhesive part peels off and the sound gradually becomes a loud and harsh sound.

[0204] Example 2

[0205] In the above-mentioned Example 1, as the resin constituting the male-shaped Velcro (A), a resin particle (based on JIS K 7215 D-type durometer hardness: 60) in which 20% by mass of an olefin elastomer resin (ethylene-propylene rubber and a soft segment ratio of 50% by mass) is added to a polypropylene resin is used, and in addition, as the resin for the non-foamed resin sheet (B) integrally provided on the back, a mixture of 50 parts by mass of an olefin elastomer (ethylene-propylene rubber and a soft segment ratio of 50% by mass), 20 parts by mass of polypropylene, and 30 parts by mass of barium sulfate is used (it should be noted that the D-type durometer hardness of the mixed resin of the above-mentioned composition of the olefin elastomer and polypropylene is 30 based on JIS K 7215), except that a sheet with a male-shaped Velcro is obtained in exactly the same manner as in Example 1. Then, the maximum sound pressure (dB) of the hooking force and the peeling sound at a frequency of 2 to 20kHz is measured in the same manner as in Example 1. The results are shown in Result Table 2.

[0206] Example 3

[0207] In the above-mentioned Example 1, nylon 6 (Amilan U121 manufactured by Toray Co., Ltd.: D-type durometer hardness based on JIS K 7215 is 95) is used as the resin constituting the male-shaped Velcro (A), and a mixture of 70 parts by mass of a polyamide elastomer resin (XPA model 9068X1 manufactured by Ube Industries, Ltd.: D-type durometer hardness based on JIS K 7215 is 68) and 30 parts by mass of barium sulfate is used as the resin for the non-foamed resin sheet (B) integrally provided on the back thereof, and a sheet with a male-shaped Velcro is obtained in exactly the same manner as in Example 1. Then, the maximum sound pressure (dB) of the hooking force and the peeling sound at a frequency between 2 and 20 kHz is measured in the same manner as in Example 1. The results are shown in Result Table 2.

[0208] Comparative Example 5

[0209] Using an instant adhesive (cyanoacrylate) as an adhesive, a sheet of 2.5 mm thick made of a barium sulfate-containing resin, the same as the sheet used in Example 2, was attached to the back of the male-shaped hook and loop fastener produced in Example 2. Then, the hooking force and the maximum sound pressure (dB) of the peeling sound at a frequency of 2 to 20 kHz were measured in the same manner as in Example 1. The results are recorded in Table 2.

[0210] Example 4

[0211] In the above-mentioned Example 1, the height of the male hook element was changed to 0.4 mm, and the density of the male hook element was set to 147 pieces / cm 2 In addition, using a mold roller in which the bending direction of the male hook element is in the opposite direction of the unit, a male-type molded Velcro made of a polyester elastomer resin is manufactured in the same manner as in Example 1, and further, a non-foamed resin sheet (B) with a thickness of 2.8 mm is joined and integrated on the back side in the same manner as in Example 1, thereby obtaining a sheet with a male-type molded Velcro.

[0212] The male type molded hook and loop fastener (A) present on the surface of the sheet with male type molded hook and loop fastener obtained has a lower hook element height, a higher hook element density, and a smaller shape and arrangement state than Example 1. The hook force and the maximum sound pressure (dB) of the peeling sound of the sheet with male type molded hook and loop fastener obtained in this way were measured between the frequency of 2 and 20 kHz. The results are shown in Result Table 2.

[0213] Example 5

[0214] In the above-mentioned embodiment 1, as a manufacturing method of a sheet with male-shaped Velcro, the above-mentioned second method is utilized. That is, the same resin melt as in embodiment 1 flows over the surface of the metal roller that is the same as the metal roller used in embodiment 1, and the molten resin of the resin is injected into the cavity at the same time, and further the surface of the resin melt on the metal roller is superimposed with a sheet of 2.5 mm in thickness made of 50 parts by mass of polyester elastomer resin and 30 parts by mass of barium sulfate that is the same as the resin mixture of the sheet in embodiment 1 and is crimped, and after the molten liquid is cooled and solidified in this state, it is peeled off from the surface of the metal roller and extracted from the cavity, thereby manufacturing a sheet with a male-shaped Velcro having a non-foamed resin sheet (B) with a thickness of 2.3 mm on the back of the male-shaped Velcro (A) with a J-shaped hook element. Then, the maximum sound pressure (dB) of the hooking force and the peeling sound between the frequencies of 2 to 20 kHz is measured in the same manner as in embodiment 1. The results are recorded in Table 2.

[0215] Comparative Example 6

[0216] A natural rubber sheet with a thickness of 2.5 mm (with a hardness of 30 according to the D-type durometer of JIS K 7215) was attached to the back of a commercially available fabric hook fastener [A8693Y.00 manufactured by Loreto Adhesive Fastener Co., Ltd.: the hook-shaped hook element is made of a polyester monofilament with a diameter of 0.19 mm and a height of 1.85 mm] using an instant adhesive (cyanoacrylate). Then, the hooking force and peeling sound of the fabric hook fastener with the natural rubber sheet were measured in the same manner as in the above-mentioned Examples and Comparative Examples. The results are shown in Table 2 below.

[0217] Comparative Example 7

[0218] Using an instant adhesive (cyanoacrylate) as an adhesive, a natural rubber sheet with a thickness of 2.5 mm (based on the D-type durometer hardness of JIS K 7215 of 30) was adhered to the back of the male-shaped molded hook and loop fastener manufactured in Example 2 in the same manner as in the above-mentioned comparative example 5. Then, the hooking force and peeling sound of the male-shaped molded hook and loop fastener with the natural rubber sheet were measured in the same manner as in the above-mentioned embodiments and comparative examples. The results are shown in the following Table 2.

[0219] Example 6

[0220] In the above-mentioned Example 1, the shape of the hook-shaped hooking element engraved on the outer circumference of the annular mold used as the mold is changed to a Y-shape, that is, a shape in which the front end of the branch is bent toward the direction close to the outer circumference. Apart from this, a male molded Velcro having a Y-shaped male hooking element is manufactured in the same manner as Example 1.

[0221] The shape of the male hook element of the obtained male molded hook and loop fastener (A) is as follows: Figure 4The Y-shaped shape shown has a height (H) of 0.4 mm from the substrate surface, and the lower end of the front end of the male hook element is closer to the substrate by only 5% of the height (H) of the male hook element relative to the height of the lower end of the top of the male hook element. In addition, the width (W) of the male hook element at the top is 0.15 mm, the thickness (S) of the male hook element at the top is 0.09 mm, and the density of the male hook element is 147 pieces / cm 2 , the thickness of the substrate is 0.20 mm, the interval (E) between adjacent male hook elements in the row direction is 1.15 mm, and the interval between adjacent rows of hook elements is 0.20 mm. Figure 4 The male hook element (a2) is shown as a continuous ridge-like protrusion (a3) ​​with a height of 0.10 mm in the row direction of the male hook element. The male hook element (a2) rises from the ridge-like protrusion (a3), and each branch branched into a Y shape also extends in the ridge direction of the ridge-like protrusion. Moreover, the male hook element (a2) becomes thinner from the root to the front end.

[0222] By the same molding method as Example 1, the non-foamed resin sheet of 2.5mm thickness made of barium sulfate resin as Example 1 is directly and integrally arranged on the back side of the male type molding hook and loop fastener (A). In the integrally arranged object obtained, around the male type molding hook and loop fastener (A), there is a wide 5mm (region corresponding to the above-mentioned 20mm length direction of the hook and loop fastener) and a wide 5mm and 55mm (region corresponding to the above-mentioned wide 40mm) region where the hook and loop fastener is not integrally arranged and one side is exposed in a way around the hook and loop fastener (A). In addition, the back and side of the substrate are directly bonded to the resin constituting the sheet, and the surface of the hook and loop fastener (A) becomes a positional relationship that sinks more than the surface of the sheet. The hooking force of the sheet with the male type molding hook and loop fastener obtained in this way and the maximum sound pressure (dB) of the peeling sound between the frequency 2~20kHz are measured. Its results are shown in the result table 2.

[0223] Comparative Example 8

[0224] In Example 2, as a resin for a non-foamed resin sheet (B) integrally provided on the back side, 20% by mass of olefin elastomer resin (ethylene-propylene rubber and soft segment ratio of 50% by mass) was added to 70 parts by mass of resin particles (based on JIS K 7215 D-type durometer hardness: 65) in a polypropylene resin used as a resin constituting a male-shaped hook and loop fastener (A), and 30 parts by mass of barium sulfate was added and used, and a sheet with a male-shaped hook and loop fastener was manufactured by the same method as in Example 2. Then, the maximum sound pressure (dB) of the hooking force and the peeling sound at a frequency of 2 to 20 kHz was measured in the same manner as in Example 2. The results are recorded in Table 2 below.

[0225] Comparative Example 9

[0226] In Example 3, as a resin for a non-foamed resin sheet (B) integrally provided on the back, a resin to which 30 parts by mass of barium sulfate was added to 70 parts by mass of nylon 6 (Amilan U121 manufactured by Toray Co., Ltd.: D-type durometer hardness based on JIS K 7215 is 95) used as a resin constituting a male-shaped hook and loop fastener (A) was used, and a sheet with a male-shaped hook and loop fastener was manufactured by the same method as in Example 3. Then, the maximum sound pressure (dB) of the hooking force and the peeling sound at a frequency of 2 to 20 kHz was measured in the same manner as in Example 2. The results are collectively recorded in Table 2 below.

[0227] Comparative Example 10

[0228] In Example 2, as the resin constituting the male molded Velcro (A), a mixture of 60 parts by mass of an olefin elastomer resin (ethylene-propylene rubber and a soft segment ratio of 50% by mass), 10 parts by mass of polypropylene, and 30 parts by mass of barium sulfate, which is used as a resin for a non-foamed resin sheet (B) integrally provided on the back, is used (it should be noted that the D-type durometer hardness of the mixed resin of the above-mentioned composition of olefin elastomer and polypropylene is 25 based on JIS K 7215), and in addition, a sheet with a male molded Velcro is manufactured in the same manner as in Example 2. Then, the maximum sound pressure (dB) of the hooking force and the peeling sound at a frequency of 2 to 20kHz is measured in the same manner as in Example 2. The results are recorded in Table 2 below.

[0229] [Table 2]

[0230]

[0231] It is clear from Table 2 above that although the sheets with male-shaped Velcro of Examples 2 and 3 are slightly inferior to those of Example 1, the initial hooking force and the hooking force after 100 repeated hooking / peeling are excellent. In addition, the peeling sound at this time is also quiet, which is particularly quiet compared to the peeling sound of existing Velcro.

[0232] In addition, the peeling sound of Examples 4 and 5 is very quiet as in Example 1, and is particularly quiet compared to the peeling sound of the existing Velcro. Moreover, the hooking force is also excellent, and this excellent performance is almost unchanged even if the hooking and peeling are repeated. In addition, it can be seen that the shape of the male hook element of Example 6 is different from that of the other examples, but no matter what shape the male hook element is, it has excellent hooking force and peeling sound reduction effect.

[0233] On the other hand, in the case of Comparative Example 5, although the hooking force is slightly inferior to that of Example 1, it has an excellent value. Regarding the peeling sound, during the repeated hooking and peeling process, the sound gradually becomes louder and becomes a harsh sound. Compared with Example 2, the peeling sound after repeated use is much worse and is not satisfactory.

[0234] In addition, in Comparative Example 6, a rubber sheet was attached to the back of the fabric Velcro, and the peeling sound was slightly reduced from the creaking noise in the case of the existing fabric Velcro, which was quite different. In addition, when the hooking and peeling were repeatedly performed, the tension at this time caused the back of the hooking element to easily peel off from the rubber sheet, and a tendency for the peeling sound to become higher was observed.

[0235] In addition, in Comparative Example 7, a rubber sheet is attached to the back of the molded Velcro, and the peeling sound is slightly improved compared with Comparative Example 6, but is worse than any of the above-mentioned embodiments. In addition, when the hooking and peeling are repeatedly performed, the peeling sound becomes higher as in Comparative Example 5.

[0236] In addition, in Comparative Examples 8 and 9, the resin constituting the sheet integrally provided on the back is also the same as the resin constituting the molded Velcro, but the silencing effect of the peeling sound of the sheet with the male-type molded Velcro obtained in these Comparative Examples is very low and very rigid, so it cannot be installed on clothes, etc., and no advantage of integrally providing the silencing sheet on the back is found.

[0237] In addition, similarly to Comparative Example 3, Comparative Example 10 has a much lower initial hooking force than Example 2, and does not have the basic performance required of a hook and loop fastener.

[0238] Example 7

[0239] In the above-mentioned embodiment 1, as the manufacturing method of the sheet with male type molding hook and loop fastener, the above-mentioned 3rd method is utilized. That is, the back side of the male type molding hook and loop fastener (A) manufactured in embodiment 1 is superimposed on the melting sheet of thickness 2.2mm made of thermoplastic polyester elastomer resin (Hytrel 3046 made by Toray·DuPont Co., Ltd.: durometer hardness (D type): 27) 70 mass parts and barium sulfate 30 mass parts and is crimped, and then it is cooled, and the male type molding hook and loop fastener (A) of non-foaming resin sheet (B) made of soft polyester elastomer resin and barium sulfate is obtained being provided with integrally on the back side.

[0240] The thickness of the sheet (B) in the obtained integrally arranged object is 2.2 mm, and the sheet (B) is directly laminated on the back of the male molded hook and loop fastener (A), and the back and side of the substrate of the male molded hook and loop fastener (A) are directly bonded to the resin constituting the non-foamed resin sheet (B), and the surface of the male molded hook and loop fastener (A) is in a positional relationship that is lower than the surface of the sheet (B) at the position where the male molded hook and loop fastener (A) is not bonded. The hooking force and the size of the peeling sound of the sheet with the male molded hook and loop fastener obtained in this way were measured.

[0241] As a result, it was found that the initial hooking force was 0.23 N / cm for peeling, the initial peeling sound was 89 DB, and the hooking force after 100 times of hooking / peeling was 0.22 N / cm for peeling, and the initial peeling sound was 88 DB, which were almost the same excellent hooking strength and quietness as Example 1. Moreover, as in Example 1, there was no need to take measures for making the resin of the sheet (B) flow into the hooking element surface, which was also excellent in terms of simplicity of the process.

Claims

1. A sheet with a male-shaped hook and loop fastener, wherein a non-foamed resin sheet (B) is integrally provided on the back of the male-shaped hook and loop fastener (A), and the following conditions 1) to 4) are satisfied, 1) The male molded hook and loop fastener (A) comprises a resin substrate (a1), and a plurality of male hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1); 2) the male hook element (a2) is bent in the middle in the same direction as the row direction of the male hook element, the front end of the male hook element (a2) is close to the base plate (a1), and the male hook element (a2) is formed of the same resin as the resin constituting the base plate (a1); 3) A non-foamed resin sheet (B) is directly laminated integrally on the back of the male molded hook and loop fastener (A); 4) The resin constituting the non-foamed resin sheet (B) is a resin mainly composed of an elastomeric resin of the same type as the resin constituting the male type molded hook and loop fastener (A), and the hardness of the resin constituting the non-foamed resin sheet (B) is lower than that of the resin constituting the male type molded hook and loop fastener (A), The resin constituting the male molded fastener (A) has a D-type durometer hardness of 50 to 100 based on JIS K 7215, and the resin constituting the non-foamed resin sheet (B) has a hardness of 10 to 70, and the difference in hardness between the two is in the range of 20 to 60.

2. The sheet with male molded hook and loop fastener according to claim 1, wherein: The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of any of polypropylene resin, polyester elastomer resin, and polyamide resin.

3. The sheet with male-shaped hook and loop fastener according to claim 1 or 2, wherein: The resin constituting the male molded hook and loop fastener (A) and the resin constituting the non-foamed resin sheet (B) are any of the following 5) to 7), 5) The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polypropylene resin, and the resin constituting the non-foamed resin sheet (B) is a resin mainly composed of an olefin elastomer resin; 6) The resin constituting the male molded hook and loop fastener (A) and the resin constituting the non-foamed resin sheet (B) are both resins with polyester elastomer resin as the main component; 7) The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polyamide resin, and the resin constituting the non-foamed resin sheet (B) is a resin mainly composed of a polyamide elastomer resin.

4. The sheet with male molded hook and loop fastener according to any one of claims 1 to 3, wherein The thickness of the substrate (a1) is 0.15 to 0.30 mm, and the thickness of the non-foamed resin sheet (B) is 0.2 to 4 mm. The thickness of the non-foamed resin sheet (B) is equal to or greater than the thickness of the substrate (a1).

5. The sheet with male molded hook and loop fastener according to any one of claims 1 to 4, wherein The male hook element (a2) of the male molded hook and loop fastener (A) has an inverted J-shape or a Y-shape, and the height from the substrate (a1) to the top of the male hook element (a2) is 0.2 to 1.5 mm.

6. The sheet with male molded hook and loop fastener according to any one of claims 1 to 5, wherein On the surface of the substrate (a1), there are continuous ridge-like protrusions in the direction of the columns of the male hook elements (a2). The male hook elements (a2) stand up from the ridge-like protrusions, and the columns of the male hook elements (a2) are formed along the ridges of the continuous ridge-like protrusions.

7. A method for manufacturing a sheet with a male-shaped hook and loop fastener, the method comprising: A male molded hook and loop fastener (A) satisfying the following conditions i) to iii) is placed in a recessed portion in a mold so that the male hook element (a2) is on the bottom side of the recessed portion, and in this state, a molten non-foamed resin satisfying the following condition iii) is injected into the mold and removed from the mold after cooling. i) The male molded hook and loop fastener (A) comprises a resin substrate (a1), and a plurality of male hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1); ii) the male hook element (a2) is bent in the middle in the same direction as the row direction of the male hook element, the front end of the male hook element (a2) is close to the base plate (a1), and the male hook element (a2) is formed of the same resin as the resin constituting the base plate (a1); iii) the resin constituting the non-foamed resin sheet (B) is a resin mainly composed of an elastomer resin of the same type as the resin constituting the male type molded hook and loop fastener (A), and the hardness of the non-foamed resin is lower than that of the resin constituting the male type molded hook and loop fastener (A), The resin constituting the male molded fastener (A) has a D-type durometer hardness of 50 to 100 based on JIS K 7215, and the resin constituting the non-foamed resin sheet (B) has a hardness of 10 to 70, and the difference in hardness between the two is in the range of 20 to 60.

8. The method for producing a sheet with male-shaped hook and loop fastener according to claim 7, wherein: The resin constituting the male molded hook and loop fastener (A) satisfies the following iv), and the non-foamed resin satisfies any of the following v) to vii), iv) The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of any resin selected from polypropylene resin, polyester elastomer resin, and polyamide resin; v) when the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polypropylene resin, the non-foamed resin is a resin mainly composed of an olefin elastomer resin; vi) when the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polyester elastomer resin, the non-foamed resin is a resin mainly composed of a polyester elastomer resin; vii) When the resin constituting the male molded surface fastener (A) is a resin mainly composed of a polyamide resin, the non-foamed resin is a resin mainly composed of a polyamide-based elastomer resin.

9. A method for manufacturing a sheet with a male-shaped molded hook and loop fastener, wherein the sheet with a male-shaped molded hook and loop fastener has a non-foamed resin sheet (B) on the back of the male-shaped molded hook and loop fastener (A), the method comprising: A molten resin satisfying the following conditions III) is passed through the surface of a metal roller satisfying the following conditions I) and II) and the molten resin is pressed into the cavity. A sheet (B) made of a non-foamed resin satisfying the following conditions III) is superimposed on the surface of the molten resin on the metal roller and pressure-bonded. The molten resin is cooled and solidified in this state, and then peeled off from the surface of the metal roller and extracted from the cavity. I) The metal roller is formed by stacking thin annular molds with multiple cutouts in the shape of male hook elements carved on the outer circumference; II) on the surface of the metal roller, a plurality of male hooking element cavities based on the cutout are arranged in a row in the circumferential direction of the roller, each cavity is bent in the row direction of the cavity midway, and the front end of the cavity is close to the surface of the metal roller; III) the non-foamed resin is a resin mainly composed of an elastomer resin of the same type as the resin constituting the molten liquid, and the hardness of the non-foamed resin is lower than that of the resin constituting the molten liquid, The resin constituting the male molded fastener (A) has a D-type durometer hardness of 50 to 100 based on JIS K 7215, and the resin constituting the non-foamed resin sheet (B) has a hardness of 10 to 70, and the difference in hardness between the two is in the range of 20 to 60.

10. The method for producing a sheet with male-shaped hook and loop fastener according to claim 9, wherein: The resin constituting the melt satisfies the following IV), and the non-foamed resin satisfies any of the following V) to VII), IV) the resin constituting the melt is a resin mainly composed of any resin selected from polypropylene resin, polyester elastomer resin, and polyamide resin; V) when the resin constituting the melt is a resin mainly composed of a polypropylene resin, the non-foamed resin is a resin mainly composed of an olefin elastomer resin; VI) when the resin constituting the melt is a resin mainly composed of a polyester elastomer resin, the non-foaming resin is a resin mainly composed of a polyester elastomer resin; VII) When the resin constituting the melt is a resin mainly composed of a polyamide resin, the non-foamed resin is a resin mainly composed of a polyamide-based elastomer resin.

11. A method for manufacturing a sheet with a male-shaped molded hook and loop fastener, wherein the sheet with a male-shaped molded hook and loop fastener has a non-foamed resin sheet (B) on the back of the male-shaped molded hook and loop fastener (A), the method comprising: A sheet (B) in a molten state made of a non-foamed resin satisfying the following condition iii) is superimposed on the back of a male molded hook and loop fastener (A) satisfying the following conditions i) to iii) and pressure-bonded, and then cooled and solidified. i) The male molded hook and loop fastener (A) comprises a resin substrate (a1), and a plurality of male hook elements (a2) rising from the surface of the substrate and arranged in a row on the substrate (a1); ii) the male hook element (a2) is bent in the middle in the same direction as the row direction of the male hook element, the front end of the male hook element (a2) is close to the base plate (a1), and the male hook element (a2) is formed of the same resin as the resin constituting the base plate (a1); iii) the resin constituting the non-foamed resin sheet (B) is a resin mainly composed of an elastomer resin of the same type as the resin constituting the male type molded hook and loop fastener (A), and the hardness of the non-foamed resin is lower than that of the resin constituting the male type molded hook and loop fastener (A), The resin constituting the male molded fastener (A) has a D-type durometer hardness of 50 to 100 based on JIS K 7215, and the resin constituting the non-foamed resin sheet (B) has a hardness of 10 to 70, and the difference in hardness between the two is in the range of 20 to 60.

12. The method for manufacturing a sheet with male-shaped hook and loop fastener according to claim 11, wherein: The resin constituting the male molded hook and loop fastener (A) satisfies the following iv), and the non-foamed resin satisfies any of the following v) to vii), iv) The resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of any resin selected from polypropylene resin, polyester elastomer resin, and polyamide resin; v) when the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polypropylene resin, the non-foamed resin is a resin mainly composed of an olefin elastomer resin; vi) when the resin constituting the male molded hook and loop fastener (A) is a resin mainly composed of a polyester elastomer resin, the non-foamed resin is a resin mainly composed of a polyester elastomer resin; vii) When the resin constituting the male molded surface fastener (A) is a resin mainly composed of a polyamide resin, the non-foamed resin is a resin mainly composed of a polyamide-based elastomer resin.

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