JP2018029912A - Woven hook-and-loop fastener including hook-like engaging element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hook-and-loop fastener having high engaging force in the hook-and-loop fastener including, on a surface thereof, multiple hook-like engaging elements each formed by cutting one leg of a loop formed of a monofilament.SOLUTION: A woven hook-and-loop fastener includes multiple monofilaments woven in a base fabric, projecting from a base fabric surface into a loop-like shape, where one legs of the loops are cut to form hook-like engaging elements. The woven hook-and-loop fastener includes the hook-like engaging elements, each of which has two projections radially projecting from the monofilament surface, being symmetrically present at both sides of a monofilament central part in the cut part. The projection length of the projection is 10% or more of the diameter of the monofilament.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a woven surface fastener in which a large number of monofilaments woven into a base fabric protrude in a loop shape from the surface of the base fabric, and one leg of the loop is cut to form a hook-like engagement element. The present invention relates to a hook-and-loop fastener in which an excellent engaging force is obtained by having a specific shape of a cut surface of a combined element.

  Conventionally, a hook surface fastener having a hook-like engagement element on the surface and a loop surface fastener having a loop-like engagement element on the surface can be easily engaged / released and can be repeatedly engaged / released. Therefore, it is widely used as a mounting member.

  As a representative of these hook-and-loop fasteners, a monofilament for hook-like engagement elements is woven into a woven base fabric made of warps and wefts in parallel with the warp, and the woven monofilament is projected in a loop on the surface of the base fabric at various locations on the base fabric. A hook hook-and-loop fastener is widely used in which a loop shape is fixed by heat treatment and then one leg of the loop is cut to make the loop into a hook shape.

  In a woven surface fastener having such a hook-like engagement element, having a high engagement force is one of the most important performance requirements, and various researches have been conducted on methods for increasing the engagement force of a surface fastener. For example, a typical method includes a method of increasing the thickness of the monofilament constituting the hook-shaped engagement element, a method of increasing the element density of the hook-shaped engagement element, and the like.

  However, the method of increasing the thickness of the monofilament constituting the hook-shaped engaging element is a field where the surface fastener obtained becomes hard or the surface fastener itself is rigid, and a soft touch such as for clothing or a belt is required. The method of increasing the element density of the hook-like engagement element is difficult to weave the surface fastener of such a high-density engagement element, and only one leg of the highly dense loop is used. It is extremely difficult to cut accurately to form a hook-like engagement element, which is accompanied by manufacturing difficulties.

  Instead of such a method, hot air is blown to the cutting portion of the hook-like engagement element, and the cutting end is melted to make an enlarged portion, or the planned cutting portion of the loop is heated and cut at high frequency. Thus, a method has been proposed in which the cutting portion is melted and expanded to make it difficult for the loop-shaped engaging element engaged with the hook-shaped engaging element to be detached from the hook, thereby increasing the engagement force (Patent Document 1 and 2).

  However, the method of expanding and expanding the end by melting such a cut portion is that the hook-like engagement elements are densely forested, and the hook-like engagement is performed by heat treatment for fixing the loop shape before that. In the hook surface fastener in which the shape and orientation of the elements are different between the engaging elements and the cutting part is slightly different between the engaging elements, it is extremely difficult to apply heat to only the cutting part or the planned cutting part. In the manufacturing process of a hook surface fastener that is difficult and manufactured at a high speed, it can be said that it is practically impossible to actually expand and expand only the end portion by melting only such specific places.

Japanese Examined Patent Publication No. 47-18307 (claims column and FIG. 2) Japanese Patent Application Laid-Open No. 60-108002 (claims column and FIG. 3)

  The present invention provides a simple cutting method for cutting one leg of the hook-shaped engagement element monofilament, rather than melting the cutting portion of the hook-shaped engagement element and expanding the end as in the prior art. The purpose of this invention is to obtain a hook-and-loop fastener with a high engaging force by making the shape of the cutting part special by adding various ideas. The purpose of the present invention is to obtain a hook-and-loop fastener with a higher engagement force by changing the general one.

  That is, the present invention provides a woven surface fastener in which a large number of monofilaments woven into a base fabric protrude from the surface of the base fabric in a loop shape, and one leg of the loop is cut to form a hook-like engagement element. There are two protrusions protruding radially from the surface of the monofilament at the location, with the hook-like engagement element having a protrusion length of 10% or more of the monofilament diameter. It is a woven surface fastener.

  And preferably, in such a woven surface fastener, at least one of the two protrusions is a case where the protruding length is 20% or more of the monofilament diameter, and the cutting surface of the cutting portion has two pieces. This is a case where an ellipse having a major axis of a line connecting the protrusions is present, and the surface has irregularities.

  Preferably, in such a woven surface fastener, the cut portion is formed in a portion that is bent obliquely downward to approach the base fabric surface from a state parallel to the base fabric at the top of the hook-shaped engagement element. More preferably, the cut portion is present at a position that is 1/6 to 1/3 lower than the height of the hook-like engagement element from the top.

More preferably, in such a woven surface fastener, there are two or more warp yarns and one or more weft yarns constituting the base fabric between the legs of the loop.
In such a woven surface fastener, the cut monopod remaining monofilament paired with the hook-like engagement element protrudes from the surface of the base fabric, and there are two protrusions at the cut portion. This is a case where the protruding length of the portion is 10% or more of the monofilament diameter, and the tip portion of the monofilament remaining on the cut piece leg is inclined at an angle of 10 to 30 ° from the vertical surface of the base fabric.

  The present invention is a blade for cutting a hook-like engagement element loop leg with a blade such as a clipper when manufacturing a woven surface fastener having a hook-like engagement element to form a hook-like engagement element. Instead of using a sharp one as in the past, use a piece with a rounded edge, or use one with a loosely meshed blade so that the surface of the monofilament Two long protrusions projecting in the radial direction from the center of the monofilament so that there are two in the object, and the loop that has entered the hook due to the presence of such long protrusions As a result of preventing the hook-like engagement element from easily detaching from the hook, a high engagement force can be obtained.

  According to the present invention, unlike the above-described prior art, it is not necessary to use a difficult and sophisticated device such as applying heat to the cut portion to melt and providing a ball-shaped bulge portion by the interfacial tension of the molten resin, and generally used in the past. A high engagement force can be obtained only by a simple operation for sweetening the cutting blade of the cutting apparatus.

  Furthermore, in such hook hook-and-loop fasteners having long protrusions on the cutting portion, the hook is made higher by positioning the one leg of the hook-like engagement element loop than the conventional hook-like engagement element. The loop-like engagement element can easily enter inside, and the engagement force is further improved.

It is the perspective view which showed typically a suitable example of the woven surface fastener of this invention. It is a side view which shows typically an example of the suitable hook-shaped engagement element of the woven surface fastener of this invention. It is an enlarged view which shows typically the cutting part of the hook-shaped engagement element shown in FIG. It is a schematic diagram at the time of seeing an example of the suitable hook-shaped engagement element of the woven surface fastener of this invention from a cut surface.

The present invention will be described in detail with reference to the drawings.
First, as shown in FIG. 1, the woven surface fastener having the hook-shaped engagement element of the present invention has a large number of hook-shaped engagement elements (2) rising from the surface of the base fabric (1). That is, monofilaments woven in the base fabric protrude in a loop shape from the surface of the base fabric in some places, and one leg of the loop is cut to form a hook-like engagement element. Then, the cut monopod remaining monofilament (3) is paired with each hook-like engagement element.

  The woven surface fastener of FIG. 1 is a hook-and-loop fastener that has only hook-like engagement elements as engagement elements on the surface of the base fabric. It may be mixed with elements, or may have hook-like engagement elements and loop-like engagement elements on the back of the base fabric.

  Among woven surface fasteners, woven surface fasteners having hook-like engagement elements are mainly formed from monofilament yarns, warp yarns and weft yarns for hook-like engagement elements. In addition, the hook / loop mixed woven surface fastener in which the hook-like engagement element and the loop-like engagement element are mixed on the same surface is mainly composed of monofilament yarn for hook-like engagement element and multifilament yarn for loop-like engagement element. , Warp and weft. And these hook-and-loop fasteners may be woven with yarns other than these if necessary.

  As these main yarns, polyesters typified by polyethylene terephthalate and polybutylene terephthalate, nylons typified by nylon 6 and nylon 66, and polyolefins typified by polyethylene and polypropylene are used. Among these, polyester yarn is preferable in that an engagement force can be obtained due to high hook shape retention.

  The warp yarn is preferably a multifilament yarn, and the thickness of the multifilament yarn constituting the warp yarn is preferably a multifilament yarn having a total decitex of 16 to 96 filaments of 75 to 250 dtex, particularly 24 to 45. A multifilament yarn having a total decitex of 100 to 200 decitex made of a single filament is preferred.

  The weft yarn is preferably a multifilament yarn, and the thickness of the multifilament yarn constituting the weft yarn is preferably a multifilament yarn having a total detex of 24 to 75 filaments of 75 to 300 dtex, particularly 24 to 48 yarns. A multifilament yarn having a total decitex of 75 to 200 decitex is preferable.

  The weft preferably contains heat-fusible fibers. A typical example of the heat-fusible fiber is a core-sheath type heat-fusible fiber having a sheath component as a heat-fusible component. Since the weft contains heat-fusible fibers, it becomes possible to firmly fix the hook-like engagement element yarn and the loop-like engagement element yarn to the base fabric, and the hook like a conventional surface fastener. It is no longer necessary to apply a backcoat resin such as polyurethane or acrylic to the back of the hook-and-loop fastener base fabric to prevent the thread for loop-like engagement elements or the loop-like engagement element from being pulled out of the base fabric, simplifying the process. Can be realized.

  It is possible to fix the hook-like engagement element yarn or the loop-like engagement element yarn to the base fabric by using a heat-fusible fiber for the warp instead of the weft. Since loop engagement element yarns are driven into the base fabric in parallel with the warp yarns, the warp yarns have far fewer points intersecting the hook engagement element yarns and loop engagement element yarns than the weft yarns. Therefore, when the heat-fusible fiber is used only for the warp, it is difficult to firmly fix the hook-like engagement element yarn or the loop-like engagement element yarn to the base fabric, and further use the heat-fusible fiber for the warp. When it is used, it is difficult to keep the tension applied to the traveling base fabric constant in the continuous production of the hook-and-loop fastener, and it is difficult to stably and continuously produce the hook-and-loop fastener of a certain quality.

  The hook-shaped engaging element constituting the woven hook hook-and-loop fastener is required to have a so-called hook shape retaining property and rigidity in which the hook shape cannot be extended with a light force, and for this purpose, a monofilament yarn made of a thick synthetic resin is used. In the present invention, as the monofilament yarn, a monofilament yarn formed from polyethylene terephthalate polyester or polybutylene terephthalate polyester particularly excellent in hook shape retention is preferably used.

  As the thickness of the monofilament yarn for hook-like engagement element, the one having a diameter of 0.13 to 0.40 mm is easy to enter while the loop-like engagement element to be engaged is standing, and the loop is caught The shape engagement element is preferable in that it is difficult to come off, and more preferably has a diameter of 0.18 to 0.35 mm. The cross-sectional shape of the monofilament is preferably a round cross-section, but may be an irregular cross-sectional shape represented by a polygonal system such as a triangle or a square.

  First, a surface fastener fabric is woven from the warp, weft, and monofilament yarn for hook-like engagement element. The woven structure of the woven fabric is preferably a plain weave with a hook-shaped engagement element monofilament yarn as a part of the warp, and the engagement element thread exists in parallel with the warp, rising from the base fabric surface in the middle of the structure, A weaving structure that loops over two or more warps and one or more wefts and forms between the wefts while forming a loop can efficiently cut one foot side of the loop for hook-like engagement elements, and further It is preferable because the combined element and the loop-shaped engaging element can be easily engaged with each other and a high engaging force can be obtained. More preferably, it is a case where it rises from the base fabric surface, jumps over three warps and one weft and forms a loop between them.

  The warp weave density is preferably 45 to 90 yarns / cm after the heat treatment, and the weft yarn density is preferably 15 to 30 yarns / cm after the heat treatment. The number of hook-type engaging element monofilament yarns to be driven is preferably about 3 to 6 for 20 warp yarns (including hook-type engaging element monofilament yarns).

  In the case of a hook and loop mixed surface fastener, a total of 20 warp yarns (monofilament yarns for hook-like engagement elements and loop-like engagement elements) of monofilament yarns for hook-like engagement elements and multifilament yarns for loop-like engagement elements 3 to 6 are preferable, and the ratio of the number of monofilament yarns for hook-like engagement elements and multifilament yarns for loop-like engagement elements is in the range of 40:60 to 60:30. preferable.

  Apply the backcoat resin to the back of the woven hook-and-loop fastener base fabric, or if heat-fusible low-melting fiber is used for the weft, heat is applied to melt the fiber. Fix the base fabric. Thereby, it can prevent that an engagement element is pulled out from a base fabric in the case of engagement and peeling. When the backcoat resin is applied, a polyurethane or acrylic resin is used as the backcoat resin. When the backcoat resin is applied, an organic solvent liquid or an aqueous dispersion of these resins is used.

  Then, heat treatment is performed to fix the loop shape of the hook-like engaging element loop. In addition, when heat-fusible low-melting-point fibers are used for the base fabric, this heat treatment can also be used in the step of fixing the base fabric by melting the fibers.

The side portion of the hook-like engaging element loop existing on the base fabric surface of the hook surface fastener fabric thus obtained is cut to convert the loop into a hook-like engaging element.
Conventionally, cutting was performed using a hair clipper having a sharp blade, but in the present invention, a blade whose blade engagement is made sweeter by a round blade or the like is used. In order to make such a small blade rounded, the small blade may be scraped off by a file or the like.

The conventional hook-and-loop fastener uses a clipper having a sharp edge, and therefore the cut surface is almost the same as the shape of the monofilament cross section.
On the other hand, in the present invention, the cross-sectional shape is such that two protrusions protruding radially from the surface of the monofilament exist symmetrically with respect to the center of the monofilament, and the protrusion length of the protrusion is 10 times the monofilament diameter. % Or more. Due to the presence of such a long protrusion, the loop-like engagement element that has entered the hook does not easily disengage from the hook, and a high engagement force can be obtained.

  In the present invention, the protrusion length and the cutting position of the protrusion are determined by selecting 20 arbitrary hook-like engagement elements, measuring their protrusion length and cutting position, and calculating their average value. Is.

FIG. 2 schematically shows the shape of the hook-shaped engaging element when the hook-shaped engaging element loop is cut to form the hook-shaped engaging element (2).
When cutting a hook-like engagement element loop to form a hook-like engagement element, conventionally, the center portion of the loop height is the place where the loop spreads widest sideways and does not cut when cutting Since it can be easily cut without damaging the other leg, it was cut near the center of the height of the loop.

  In the present invention, it is preferable to cut at a position slightly higher than the conventional cutting position as shown in FIG. 2 (position close to the top of the hook), and by being cut at a slightly higher position as described above, The cut portion of the hook-shaped engagement element is formed in a portion that is bent obliquely downward in order to approach the base fabric surface from a state parallel to the base fabric at the top of the hook-shaped engagement element. The combined element easily enters the hook of the hook-shaped engaging element, and a high engaging force can be obtained.

In particular, in the present invention, as described above, since the high protrusions are symmetrically present at the cut portion of the hook-shaped engagement element, it is difficult for the loop-shaped engagement element to enter the hook. Such a cutting position is set to a position close to the top of the hook-shaped engagement element, thereby solving the problem of the presence of the protrusion. Therefore, a higher engagement force is obtained by the synergistic effect of the shape of the cut surface and the cutting position.
A preferred cutting plane position is a position that is 1/6 to 1/3 lower than the hook-shaped engaging element height (4 shown in FIG. 2) from the top of the hook-shaped engaging element.

  Furthermore, in this invention, as shown in FIG.1 and FIG.2, the cutting piece leg remainder monofilament (3) used as a pair with a hook-shaped engagement element protrudes from the surface of a base fabric (1). Also, as shown in FIG. 3, there are two protrusions at the cut location, and when the protrusion length of the protrusion is 10% or more of the monofilament diameter, the remaining monofilament of the cut leg is also hook-shaped. This is preferable because it has the ability to engage with the loop-like engagement element as well as the engagement element. In order to form a cross-sectional shape having such a protrusion, when the hook-like engagement element loop is cut, if the protrusion is formed on the cut surface, the cut piece Similarly, protrusions are formed on the remaining leg monofilament.

  And, in order to make the cut-leg remaining monofilament more engaging, the tip of the monofilament is inclined at an angle of 10 to 30 ° from the base fabric vertical surface as shown in FIG. What should I do? The angle from the substrate vertical plane of the monofilament remaining on the cut leg is the angle indicated by 8 in FIG. In order to set the angle from the substrate vertical plane of the monofilament remaining on the cut one leg to 10 to 30 °, the cutting position when cutting one leg of the hook-like engagement element loop is set at the center portion where the loop is most swollen. What is necessary is just to make it cut | disconnect in the position a little near a top part rather than cut | disconnect.

  In the present invention, one leg of the hook-like engaging element loop is cut with a clipper or the like with a loosely meshed blade by means of a round blade or the like. As a result, the monofilament at the cut location is crushed and cut from both sides by the blade. As a result, two projecting portions projecting radially from the surface of the monofilament are present symmetrically across the monofilament central portion, and the projecting length of the projecting portion is 10% or more of the monofilament diameter.

Preferably, at least one of the two protrusions formed on the cut portion is a case where the protrusion length is 20% or more of the monofilament diameter, and more preferably, both of the two protrusions are 20% or more. It is.
The protrusion length of the protrusion is proportional to the sweetness of the blade engagement and the degree of roundness of the small blade. If the protrusion length is too long, the hook shape may be damaged during cutting, and therefore the protrusion length is preferably 80% or less.

  Then, as shown in FIG. 3, the cut surface of the cut portion has an oval having a major axis of a line connecting the two protrusions (9), and the surface has irregularities (10). It is preferable that the loop-like engagement element that has entered the hook can be prevented from easily separating. Such surface irregularities (10) are also achieved by softening the engagement of the clipper blades when cutting, or by using a rounded blade.

  FIG. 4 is a view of a single leg cut surface of a hook-shaped engagement element constituting the woven surface fastener of the present invention as viewed from a direction perpendicular to the cut surface, and an oval shape in front of a circular cross section that is a cross section of a monofilament. It has a cut surface. In the figure, an oval protrusion (9) protrudes from the circular cross section, and the protrusion length (11) indicates the length of the longest portion of the portion protruding from the circle.

  As described above, the case where the monofilament cross section is circular has been described as an example, but even when the monofilament cross section is an irregular cross section such as a triangle or a square, how long the protruding portion protrudes from the cross section, The idea is basically the same as in the case of a circular cross section.

In the present invention, the height of the hook-like engagement element is preferably 1.3 to 3.0 mm from the base fabric surface in terms of the engagement force, and further in terms of the difficulty of the engagement element to fall down. In addition, the element density of the hook-like engagement element in the hook surface fastener and the total element density of the hook-like engagement element and the loop-like engagement element in the hook / loop mixed surface fastener are the base cloth portion where the engagement element exists. 30 / cm ^{2 to} 60 / cm ² and 40 / cm ^{2 to} 60 / cm ² are preferable, respectively. In the hook / loop mixed surface fastener, the ratio of the number of hook-shaped engaging elements to the number of loop-shaped engaging elements is preferably in the range of 40:60 to 60:40.

The woven surface fastener of the present invention can be used in fields of application where conventional general surface fasteners are used. For example, in addition to shoes, bags, hats, gloves, etc., clothing, sphygmomanometers, supporters, packing Binding band, binding tape, various toys, fixing of civil engineering sheet, fixing of various panels and wall materials, fixing of solar cells to the roof, fixing of electrical components, storage boxes and packing cases that can be assembled and disassembled, Can be used in a wide range of fields such as accessories and curtains.
It is particularly suitable for cuffs for blood pressure monitors, supporters, clothing, shoes, etc. Yes.

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples. In addition, the measurement of the engaging force of the obtained surface fastener was based on JISL3416.

Example 1
The following yarns were prepared as warp yarns, weft yarns and monofilament yarns for hook-like engagement elements constituting the surface fastener base fabric.
[Warning]
-Multifilament yarn made of polyethylene terephthalate with a melting point of 260 ° C-Total decitex and number of filaments: 167 dtex, 30

[Weft (multifilament heat-sealed yarn made of core-sheath type composite fiber)]
-Core component: Polyethylene terephthalate (melting point: 260 ° C)
-Sheath component: 25 mol% copolymerized polyethylene terephthalate with isophthalic acid
(Softening point: 190 ° C)
-Core-sheath ratio (weight ratio): 70:30
・ Total decitex and number of filaments: 24 at 110 dtex [monofilament for hook-like engagement element]
-Polyethylene terephthalate fiber (melting point: 260 ° C)
・ Fineness: 390 dtex (diameter: 0.19 mm)

[Manufacture of hook surface fasteners]
The warp, weft, and multifilament yarn for hook-like engagement element were used, and a plain weave was used as the woven structure so that the woven density was 55 warps / cm and 20 wefts / cm. Then, a hook-like engagement element monofilament is driven in parallel to the warp at a ratio of 1 to 4 warps, and after 5 wefts are lifted and lowered, 3 warps and 1 weft are straddled. A loop was formed on the base fabric so as to form a loop.

  The hook surface fastener fabric woven under the above conditions is a temperature at which only the sheath component of the weft is melted by heat, and the warp, the hook-shaped engagement element monofilament, and the core component of the weft are not melted by heat. Heat treatment was performed at 200 ° C. As a result, the weft yarn contracted, the base fabric was shrunk 9% in the weft direction, and the sheath component was melted to fuse the yarn existing in the vicinity. The loop shape of the hook-like engaging element loop was fixed by this heat treatment. The resulting fabric was allowed to cool.

Next, the hook-like engagement element was formed by cutting one leg of the hook-like engagement element loop using a clipper. The clippers used were made by cutting the blade with a file and cutting the corners, so that the blade did not get scratched even when a finger was pressed against the blade.
In addition, the one leg cutting portion of the loop is close to the base cloth surface from a position that is 1/4 lower than the height of the hook-like engagement element from the top and parallel to the base cloth at the top of the hook-like engagement element. It was formed in a portion that was bent diagonally downward.

The hook-shaped engagement element density of the obtained hook surface fastener was 42 pieces / cm ² , and the height of the hook-shaped engagement element from the base fabric surface was 1.8 mm. In the cut portion, there are two protrusions protruding radially from the monofilament surface with the monofilament center portion sandwiched therebetween, and the protrusion length of the protrusion is 24% of the monofilament diameter. The cut surface has an oval shape having a major axis of a line connecting two protrusions, and has a streak-like unevenness on the surface, and a concave depression is formed in the center. .

And the cut one leg remaining monofilament paired with each hook-like engagement element protrudes from the surface of the base fabric, and the tip thereof is inclined at an average angle of 25 ° from the base fabric vertical surface, It had the same protrusion as the cutting part of the hook-like engagement element.
The engaging strength of the hook surface fastener described above was measured. The loop surface fastener used as an engagement partner is a tricot fabric that has a large number of loops on its surface as loop-shaped engagement elements and is widely used as a loop surface fastener. The measurement results are shown in Table 1.

Comparative Example 1
In the first embodiment, as a clipper used for cutting one leg portion of the hook-shaped engaging element loop, a clipper having a sharp blade that is normally used (that is, an operation of scraping a small blade is performed). A hook hook-and-loop fastener was manufactured in the same manner as in Example 1 except that the above-mentioned one was used.

The cutting part of the hook-shaped engaging element of the obtained hook surface fastener is almost the same as the monofilament cross section, and some of them have a slightly distorted shape from a circular shape. Some of them had a protrusion length of 5% or less.
The hook strength of this hook surface fastener was also measured in the same manner as in Example 1. The results are shown in Table 1.

Example 2
In Example 1 described above, the one-leg cutting portion of the hook-like engaging element loop is set to the portion that is widest in the lateral direction of the loop, that is, half the height of the hook-like engaging element. A hook surface fastener was produced in the same manner as in Example 1. The engaging force of the obtained surface fastener was measured in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2
In Comparative Example 1 above, the one-leg cut portion of the hook-like engagement element loop is compared to the portion that is widest in the lateral direction of the loop, that is, half the height of the hook-like engagement element. A hook surface fastener was produced in the same manner as in Example 1. Then, the engaging force of the obtained surface fastener was measured in the same manner as in Example 1. The results are shown in Table 1.

  From the above table, it can be seen that the shape of the one leg cutting portion of the hook-like engagement element has a great influence on the engagement force of the hook surface fastener. That is, it can be seen that in the example in which a long protrusion is formed in the cross section, the engaging force is about 30% higher than in the comparative example in which such a protrusion is not formed.

1: base fabric 2: hook-shaped engagement element 3: monofilament remaining monofilament 4: hook-shaped engagement element height 5: hook-shaped engagement element top 6: hook-shaped engagement element side cutting point 7: one-leg remaining monofilament Side cut place 8: Angle from the base fabric vertical surface of the monofilament remaining monofilament tip 9: Projection 10: Concavity and convexity 11 formed on the cut surface 11: Projection length

Claims (8)

  In a woven surface fastener in which a large number of monofilaments woven into the base fabric protrude in a loop shape from the surface of the base fabric, and one leg of the loop is cut to form a hook-like engagement element, the cut location includes the monofilament surface A woven surface fastener having a hook-like engagement element in which two protrusions projecting in the radial direction are present symmetrically across a monofilament central portion, and the protrusion length of the protrusion is 10% or more of the monofilament diameter.   The woven surface fastener according to claim 1, wherein at least one of the two protrusions has a protrusion length of 20% or more of the monofilament diameter.   The woven surface fastener according to claim 1 or 2, wherein a cut surface of the cut portion has an oval shape having a major axis of a line connecting two protrusions, and the surface has irregularities.   The cutting part is formed in a portion that is bent obliquely downward in order to approach the base fabric surface from a state parallel to the base fabric at the top of the hook-shaped engagement element. Woven surface fastener.   The woven surface fastener according to any one of claims 1 to 4, wherein the cut portion is present at a position that is 1/6 to 1/3 lower than the height of the hook-like engagement element from the top.   The fabric surface fastener according to any one of claims 1 to 5, wherein two or more warps and one or more wefts constituting the base fabric are present between both legs of the loop.   The monofilament remaining remainder monofilament paired with the hook-like engagement element protrudes from the surface of the base fabric, and there are two protrusions at the cut portion, and the protrusion length of the protrusion is 10% of the monofilament diameter. It is the above, The textile hook-and-loop fastener in any one of Claims 1-6. The fabric hook-and-loop fastener according to claim 7, wherein the tip end of the monofilament remaining monofilament is inclined at an angle of 10 to 30 ° with respect to the vertical surface of the base fabric.

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