JP5841318B2 - Hook fastener - Google Patents

Description

  The present invention relates to a hook-and-loop fastener female material, a hook-and-loop fastener having the hook-and-loop fastener female material, and an absorbent article having the hook-and-loop fastener.

  The hook-and-loop fastener is widely used for fixing flooring flooring, opening and closing clothes, and is also used for engaging absorbent articles such as diapers because it is easy to attach and detach. The hook-and-loop fastener is composed of a male member and a female member engaged therewith. Specifically, the loop of the female member is locked by engaging the hook of the male member. Conventionally, a female material having sufficient engagement force with a male material has been developed.

  Patent Document 1 discloses a weft insertion warp knitted fabric used as a female knitted fabric with fasteners by hooks and loops, and has a front side and a back side, and the back side has a plurality of stitch wheels separated from each other. The loop portion of the wheel protrudes outward and is connected to the wheel only at the base, and the adjacent loop of each wheel forms a free loop that is alternately inclined in the transverse direction in the appropriate direction, and the front side of the knitted fabric There is described a knitted fabric comprising a weft thread which is inserted on the lateral side of the knitted fabric between the back and the back side and extends across the entire width of the knitted fabric.

  Patent Document 2 has a structure joined to a base material surface through a warp knitted fabric in which a loop for receiving a hook is formed. A loop pile knitted structure that engages with the swinging structure with the knitted yarn and the direction of the loop pile adjacent in the knitting direction is staggered and engages with the swinging structure or the loop pile forming structure with the thread threaded through the front heel A hook-and-loop type hook-and-loop female material piece characterized in that it is composed of warp knitted fabrics each knitted in a ground structure is described.

  Patent Document 3 discloses a knitted fabric composed of warp, weft, and loop yarns, and a hook-and-loop female material including a base material, and the warp yarn is composed of chain knitting yarn that alternately repeats the opening and closing. The loop yarn is fixed to the warp with only the opening of the loop yarn engaged only with the opening of the warp, and the loop yarn protrudes alternately to the left and right with respect to the warp only from one surface of the knitted fabric. A hook-and-loop fastener female material is described.

US Pat. No. 6,096,667 JP 2004-236960 A International Publication No. 2010/030548

  There is a need for a hook-and-loop female material that is excellent in engaging force with a male material and that has a small difference in right and left engaging force.

  The present invention is a surface fastener female material including a knitted fabric composed of warp, weft and loop yarns, and a base material. The warp, weft and loop yarns are knitted to form knots, and knots are formed. The traveling direction of the warp yarns is opposite to the traveling direction of the loop yarns forming the knots and the traveling direction of the wefts forming the knots.

  The hook and loop fastener female material of the present invention can have a structure in which loop yarns protrude alternately from left and right with respect to warp yarns from one surface of the knitted fabric. Also, during the manufacture of the hook-and-loop fastener female material (knitted fabric), and after a certain time has passed, the back leakage of the loop yarn protruding from the hook-and-loop fastener female material (on one side of the knitted fabric constituting the hook-and-loop fastener female material) The state in which the pile of the formed loop yarn is formed on the opposite surface of the knitted fabric is difficult to occur. Therefore, the obtained surface fastener female material is excellent in the engagement force with the male material, and the left-right difference in the engagement force is small. Moreover, it becomes possible to improve the tear strength of the surface fastener female material obtained by setting it as the knitting structure pattern in the surface fastener female material of this invention. Furthermore, the surface fastener female material of the present invention can be easily produced and is suitably used as a female material for surface fasteners in absorbent articles such as disposable diapers.

It is a schematic diagram which shows the cross-sectional structure in the hook-and-loop fastener female material of one Embodiment of this invention. It is a schematic diagram which shows the knitting structure of the knitted fabric in the hook-and-loop fastener female material of one Embodiment (Examples 1 and 3) of this invention. Schematic diagram showing the state of the loop yarn formed on the knitted fabric (each on the left and right loops) observed when the knitted fabric is cut along the line AA in FIG. 2A (perpendicular to the warp direction). It is. It is the figure which showed typically the pattern which shows the one aspect | mode of the knitting structure of the knitted fabric shown by FIG. 2A. FIG. 3C is a schematic diagram showing the pattern of the knitted fabric of the knitted fabric shown in FIG. 3A in an exploded manner for each warp, weft, and loop yarn. is there. It is a schematic diagram which shows the cross-sectional structure in the surface fastener of one Embodiment of this invention. It is a schematic diagram which shows the knitting structure of the knitted fabric in the hook-and-loop fastener female material of one Embodiment (Example 2) of this invention. Schematic diagram showing the state of the loop yarn formed on the knitted fabric (each on the left and right loops) observed when the knitted fabric is cut along the line BB in FIG. 5A (perpendicular to the warp direction). It is. It is the figure which showed typically the pattern which shows the one aspect | mode of the knitting structure of the knitted fabric shown by FIG. 5A. It is a schematic diagram which shows the knitting structure of the knitted fabric in the hook-and-loop fastener female material of one Embodiment (Example 4) of this invention. Schematic diagram showing the state of the loop yarn formed on the knitted fabric (each on the left and right loops) observed when the knitted fabric is cut along the line CC in FIG. 7A (perpendicular to the warp direction). It is. It is the figure which showed typically the pattern which shows the one aspect | mode of the knitting structure of the knitted fabric shown by FIG. 7A. It is a schematic diagram which shows the state of the loop yarn formed in the knitted fabric surface of the hook-and-loop fastener female material of the comparative example 1. It is a schematic diagram which shows the test sample used for tear strength measurement. It is a front view which shows the fixing method to the Tensilon tensile testing machine of a test sample used for tearing strength measurement, and a pulling direction. It is a side view which shows the fixation method to the Tensilon tensile testing machine of a test sample used for tearing strength measurement, and a pulling direction.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. In addition, the surface fastener female material of this invention is not limited to the following embodiment.

  As schematically shown in FIG. 1, the surface fastener female member 10 of the present invention includes a knitted fabric 20 including warps 21 (not shown), wefts 22 (not shown), and loop yarns 23. As well as the substrate 30. In the knitted fabric 20, the loop yarn 23 forms a pile of the knitted fabric 20, and the warp yarn 21 and the weft yarn 22 form a ground structure 25 of the knitted fabric 20, and the loop yarn 23 extends from one surface of the knitted fabric 20. The warp 21 protrudes left and right alternately.

  2A is a diagram schematically showing the knitting structure of the knitted fabric 20 having the structure of FIG. 1, and FIG. 3A is a diagram schematically showing a pattern of one aspect showing the knitting structure of FIG. 2A. FIG. 3A shows the pattern of the knitting structure of FIG. 3A disassembled into warp yarn 21 (FIG. 3B (b)), weft yarn 22 (FIG. 3B (c)) and loop yarn 23 (FIG. 3B (a)). FIG. As shown in FIGS. 2A and 3A, in the knitted fabric 20, the warp 21, the weft 22, and the loop yarn 23 are knitted to form knots 24 (24a, 24b, 24c). Here, the advancing direction of the warp yarn 21 forming the knot point 24 is opposite to the advancing direction of the loop yarn 23 forming the knot point 24 and the advancing direction of the weft yarn 22 forming the knot point 24. By having such a knitting structure, the loop yarn 23 has a structure that alternately protrudes from the one surface of the knitted fabric 20 with respect to the warp yarn 21 (see FIG. 2B). Moreover, it can be set as the structure which the back leakage of the loop thread | yarns as mentioned above does not produce easily.

  Hereinafter, the knitting structure of the knitted fabric 20 will be described with reference to the schematic diagrams shown in FIGS. 3A and 3B. The knitting structure of the knitted fabric 20 is not limited to that shown in FIGS. 3A and 3B.

  First, the warp 21 is formed by chain knitting in which a pattern of 0-1 / 1-0 / 1-0 / 0-1 is repeated, and the warp 21 becomes a ground structure 25 (medium) of the knitted fabric 20. .

  Next, the loop yarn 23 is fed to the left and right with respect to the warp yarn 21 to become a pile (front heel) of the knitted fabric 20. First, the loop yarn 23 is wrapped from the right to the left at the predetermined needle position of the knitted fabric 20 by the closing or opening, and is fed out in the left direction. Then, the loop yarn 23 fed to the left is engaged with the opening 21a of the warp 21 in reverse (that is, the loop yarn becomes a closing stitch) to form a knot 24a. That is, the advancing direction of the warp 21 that forms the knot 24a is opposite to the advancing direction of the loop yarn 23 that forms the knot 24a. Further, the loop yarn 23 is fed out to the left of the knitted fabric 20. Next, it is wrapped from the left to the right at the predetermined needle position of the knitted fabric 20 by the closing stitch or the open stitch and fed out in the right direction. Then, the loop yarn 23 fed to the right is engaged with the opening 21b of the warp 21 in reverse (that is, the loop yarn becomes a closing stitch) to form a knot 24b. Similarly to the above, also in the knot point 24b, the traveling direction of the warp yarn 21 forming the knot point 24b is opposite to the traveling direction of the loop yarn 23 forming the knot point 24b. By repeating this, the loop yarn 23 protrudes from the one surface of the knitted fabric 20 alternately to the left and right with respect to the warp yarn 21 to form a pile.

  Here, “the loop yarn protrudes alternately from the one surface of the knitted fabric to the left and right with respect to the warp yarn” means that the cross section of the knitted fabric 20 is perpendicular to the warp yarn 21 direction as shown in FIG. 2B. When viewed, it means that the loop yarns 23 are alternately formed in the left-right direction at a constant angle with respect to the surface of the ground texture 25 starting from the engaging portion with the warp portion. Therefore, although the loop yarn is formed on the left and right with respect to the warp yarn, the loop yarn is formed in a substantially parallel direction with respect to the ground texture surface (the loop yarn is lying down).

  3A and 3B, the pattern of the loop yarn 23 is represented by repetition of 6-5 / 11-10 / 5-6 / 0-1 (the left and right ends are open stitches). As other patterns, for example, 6-5 / 10-11 / 5-6 / 1-0 (when the left and right ends are closed in the embodiment shown in FIG. 3A), 5-4 / 9 -8 / 4-5 / 0-1 (mode shown in FIG. 6, left and right ends are open), 5-4 / 8-9 / 4-5 / 1-0 (right and left in the mode shown in FIG. 6) And the like when the end is closed).

  Subsequently, the weft yarn 22 and the warp yarn 21 form a ground structure 25 (rear heel) of the knitted fabric 21. 3A and 3B, the weft 22 is inserted into the chain stitch of the warp 21 with a stitch having a pattern of 4-3 / 7-7 / 3-4 / 0-0. In addition to the embodiment shown in FIG. 3A, for example, 7-6 / 13-13 / 6-7 / 0-0 (embodiment shown in FIG. 6) or 3-2 / 5-5 / 2-3 / 0-0 It may be inserted with a stitch. The weft 22 is engaged with the open end of the warp 21 at the knot point 24a (that is, the weft thread is a closed stitch), and like the loop yarn, the knot point 24a forms the knot point 24a. The traveling direction of the warp yarn 21 is opposite to the traveling direction of the weft yarn 22 forming the knot point 24a. 2, 3 </ b> A, and 3 </ b> B, the weft yarn 22 is knitted at the opening portion of the warp yarn 21, and the weft yarn 22 is laterally moved at the closing stitch of the warp yarn 21 ′ adjacent to the warp yarn 21. Has been switched.

  Thus, in the surface fastener female material 10, the warp yarn 21, the weft yarn 22 and the loop yarn 23 are knitted together to form the knot point 24, and the traveling direction of the warp yarn 21 forming the knot point 24 is the knot point 24. The traveling direction of the loop yarn 23 to be formed and the traveling direction of the weft yarn 22 forming the knot point 24 are opposite to each other.

  As apparent from FIGS. 3A and 3B, in the knitted fabric 20, the warp 21 has a structure in which knot points 24 and intersections of the warp and the weft are alternately present. As described above, the loop yarn 23 protrudes from the one surface of the knitted fabric 20 alternately to the left and right with respect to the warp yarn 21. From the point of engagement force, the protrusion angle of the loop yarn 23 with respect to the knitted fabric 20 is preferably 30 degrees or more with respect to the knitted fabric surface, and in some embodiments, 45 degrees or more. Further, the upper limit of the protrusion angle is not particularly limited, and the protrusion angle of the loop yarn 23 with respect to the knitted fabric 20 may be 80 degrees or even 90 degrees.

  Here, the pattern of the knitting structure can be defined by specifying the shape of the warp 21, weft 22, and loop yarn 23 (open or closed) at three consecutive knot points 24. That is, in the knitted fabric 20, the shape of the warp 21, weft 22, and loop yarn 23 at three knots 24 continuous in the warp direction is the minimum unit 26 for defining the pattern of the knitted fabric. Yes. As shown in FIGS. 2A and 3A, in the warp, the knot points 24 (24a, 24b, and 24c) and the warp eyes (closed eyes, not knots) are alternately present. That is, the knitted fabric shown in FIGS. 2A and 3A includes three knot points and two warp eyes (closed eyes) in the warp direction as a minimum unit for defining the pattern of the knitted structure.

  In order to effectively form a loop pile and make the back leak less likely to occur, the warp yarn 21, weft yarn 22 and loop yarn 23 at the three consecutive knots 24 have the patterns shown in Table 1 respectively. It is preferable to have. In Table 1, “O” means an opening and “C” means a closing eye. For example, “C-C-C” indicates that the shape of the thread is closed-closed-closed at three consecutive knots.

  Among the above-described patterns, in a certain aspect, any one of patterns 1 to 18 is preferably used. Further, from the viewpoint that back leakage hardly occurs, any of the knitting structures of patterns 1 to 9 is more preferable, and any of the knitting structures of patterns 1 to 3 is particularly preferable.

  The knitting machine used for knitting the knitted fabric 20 is not particularly limited, and, for example, a three-ply or four-ply knitting machine that has been widely used conventionally can be used as it is. Therefore, the surface fastener female material of the present invention can be easily and inexpensively produced.

  There are no particular restrictions on the materials of the warp yarn 21, weft yarn 22 and loop yarn 23 constituting the knitted fabric 20, and examples thereof include polypropylene, polyester, polyethylene, polyamide, polyurethane, rayon, copolymers or mixtures thereof, or natural fibers. It is done. In an embodiment, a polyamide having high strength is used from the viewpoint of preventing the female material from being broken by the engagement with the male material. In consideration of material cost and environmental stability, polyester can also be used. The loop yarn is preferably a multifilament yarn rather than a monofilament from the viewpoint of increasing the probability of engagement with the male material. In this case, if the filament of the loop yarn is thin, it may be broken during the engagement with the male material. Therefore, the one having an appropriate thickness is selected based on the shape of the surface fastener. The warp and weft may be monofilament or multifilament. In general, the fineness of the filament yarn is 20 to 220T, preferably 20 to 100T.

In some embodiments, the knitted fabric 20 can have a basis weight of 10 to 100 g per square meter. If the basis weight is 5 g / m ² or less, it may be difficult to maintain the shape as a knitted fabric when knitting, and if it is 100 g / m ² or more, the rigidity increases, so that the flexibility of the part when attached to the absorbent article May be damaged. Further, since the knitted fabric is dense, the visibility may be impaired when a design is applied on the base material. Since the surface fastener female member 10 of the present invention is excellent in engagement force with a male member and has a small difference in right and left engagement force, the basis weight can be reduced as compared with the conventional product. Therefore, the surface fastener female material excellent in visibility can be manufactured at low cost.

  Additional processing such as raising, embossing, printing, dyeing, and coloring can be applied to the surface fastener female material 10 as appropriate. Moreover, the knitted fabric 20 may be dyed in whole or in part. In particular, when used as a member of an absorbent article such as a diaper, gloss such as luster and shine can be eliminated, and an appearance with excellent aesthetics can be obtained.

  There is no restriction | limiting in particular about the base material 30, A resin film, a nonwoven fabric, paper, or these laminated bodies can be used. Examples of the resin film include polyester resins such as polypropylene, polyethylene, polystyrene, and polyethylene terephthalate, synthetic resin films such as polyamide resin and polyurethane resin, and laminated films of these synthetic resin films. Moreover, in a certain aspect, you may provide the position parameter | index of the engagement surface with a male material, various symbols, a design, etc. in a base material surface.

  The base material 30 is joined to the knitted fabric 20 on the surface opposite to the surface on which the loop yarns 23 alternately protrude from the left and right. There is no restriction | limiting in particular about the joining method of the base material 30 and the knitted fabric 20. FIG. Conventionally known methods such as dry lamination, extrusion lamination, wet lamination, thermal lamination, and ultrasonic waves can be used. Among these, the dry laminating method is preferable in consideration of productivity, flexibility, and visibility such as a position index provided on the base material layer. Adhesives such as urethane, EVA, acrylic, and vinyl acetate can be used for dry laminate adhesives, and adhesives such as starch, casein, vinyl acetate, and polyacrylates can be used for wet laminate adhesives. A resin such as polyethylene, polypropylene, or modified polyolefin can be used as appropriate. However, it is not limited to these adhesives and resins.

  In the case of dry lamination, the adhesive layer may be provided on the entire surface of one surface of the substrate, or may be provided partially. When the adhesive layer is partially provided, the method is not particularly limited. Generally, pattern application of an adhesive is used. The pattern, shape, size, etc. of application are not particularly limited, and any pattern, shape, size, such as a circle, ellipse, quadrilateral, or polygon can be employed. When the adhesive layer is partially provided on the surface of the base material, the number of loop yarns that fall due to the adhesive that has oozed through the knitted fabric can be reduced, thereby preventing a decrease in the engagement force with the hook of the male material. . Furthermore, the engagement force can be changed by appropriately setting the shape of the pattern and the amount of adhesive.

  The surface fastener female member 10 of the present invention is used as a surface fastener 50 by being combined with a male member 40 as shown in FIG. Here, the loop yarn 23 (pile) provided on the knitted fabric 20 of the hook-and-loop fastener female member 10 receives the hook 41 of the male member 40, whereby the hook-and-loop fastener female member 10 and the male member 40 are engaged and fixed. The In the hook-and-loop fastener 50 having the hook-and-loop fastener female member 10 according to the present invention, the loop yarn 23 protrudes alternately from the one surface of the knitted fabric 20 to the warp yarn 21 and the loop yarn hardly leaks back. Since the female material has, when engaged with the male material, there is little difference in the left and right engaging force with the male material.

Here, the left-right difference in the engaging force is obtained when the surface fastener female material is engaged with the male material, and both are peeled from the right to the left in the width direction (that is, the direction perpendicular to the CD direction and the warp direction). Measure the engagement force (right engagement force) and the engagement force (left engagement force) when peeling from the left to the right.
{(Average value of measured right engagement force) − (average value of measured left engagement force)} / (average value of all measured values of right engagement force and left engagement force)
Can be evaluated by obtaining a numerical value representing the absolute value of. The closer the obtained value is to 0, the smaller the left-right difference in engagement force.

  The male material may be of any type as long as the engagement force can be satisfied. For example, a male material having a mushroom-shaped, key-shaped, or J-shaped hook can be used. The pin density in the male material is not particularly specified, but is generally about 500 to 5000 pins per square inch. In one aspect, a pin density of 1600 pins per square inch is used. The material of the male material can be selected from polypropylene, polyester, polyethylene, polyamide, copolymers or mixtures thereof as well as the yarn constituting the female material. The thickness of the base material portion of the male material can also be set as appropriate. Specifically, the hook tape (CS-600) etc. which are marketed by Sumitomo 3M are mentioned.

  The hook-and-loop fastener of the present invention can be used for a flooring material or a wall material fixture, a clothing fixture, a cleaning member fixture, an automobile interior material fixture, or the like. It can also be used as a fixture for absorbent articles such as paper diapers, sanitary napkins, and breast milk pads. Here, when a surface fastener is used for an absorbent article, particularly a paper diaper, it is necessary to consider the engagement characteristics between the female material and the male material, particularly the performance of the female material. In a normal paper diaper, a pair of left and right male materials are provided on both sides of the wearer's back, and a pair of left and right female materials are provided on the front abdomen. Therefore, the male material and the female material are respectively engaged at the two left and right positions of the paper diaper. When it becomes large, the wearer may feel anxious about the reliable fixing function of the disposable diaper by the hook-and-loop fastener. The female material of the present invention is suitable because it can reduce the difference between the left and right engaging forces with the male material.

  In addition, when using the surface fastener female material of the present invention for the surface fastener of an absorbent article, examples of fixing means to the absorbent article include adhesion by glue, heat fusion, ultrasonic processing, integral molding, and sewing. And mechanical fixing with a stapler. For fixing with glue, known adhesives such as SIS, SBS and other rubber-based, acrylic-based, silicon-based, and EVA-based adhesives are appropriately selected as necessary, but are not limited to these resins.

  Examples of the present invention will be described in detail below, but the present invention is not limited to these examples.

(Example 1)
Using a three-ply knitting machine (made by KARL MAYER), tricot pile knitting, loop yarn (6-5 / 11-10 / 5-6 / 0-1), warp yarn (0-1 / 1-0 / A knitted fabric having a knitting structure of 1-0 / 0-1) and weft (4-3 / 7-7 / 3-4 / 0-0) was knitted. As materials for loop yarns, warp yarns, and weft yarns, loop yarn: polyester (84T, 36 yarns), warp yarn: polyester (22T, 1 yarn), weft yarn: polyester (56T, 24 yarns) were used. The knitting conditions were 1 in 2 out, Course: 8 / cm, Wales: 3.7 / cm, and the basis weight of the knitted fabric was 23 g / m ² .

The obtained knitted fabric was dry laminated with a polyurethane adhesive on a biaxially stretched polypropylene base material having a thickness of 12 μm to obtain a surface fastener female material. A schematic diagram of the knitting structure in the knitted fabric of the obtained surface fastener female material is shown in FIG. 2A, and a schematic diagram of the pattern of the knitting structure is shown in FIG. 3A. 2B shows the state of the loop yarn formed in the knitted fabric (one loop on the left and right sides) observed when the knitted fabric is cut along the line AA in FIG. 2A (perpendicular to the warp direction). FIG. The adhesive was blended into a polyurethane main agent (trade name: Takelac A969v, manufactured by Mitsui Chemicals Polyurethanes), an isocyanate curing agent (trade name: Takenate A5, manufactured by Mitsui Chemicals Polyurethanes), and silica (trade name: Toxeal U). , Manufactured by Tokuyama Corporation), and the amount of silica is 7% by mass with respect to the total amount of the adhesive in terms of solid content. Specifically, a polyurethane main agent and an isocyanate curing agent were added to a solvent in which silica was stirred, and the mixture was further stirred, and then laminated at 150 m / min with a dry laminator manufactured by FUJISEIKI. The coating amount was about 5 g / m ² .

(Example 2)
As in Example 1, using a three-ply knitting machine (made by KARL MAYER), tricot pile knitting, loop yarn (5-4 / 9-8 / 4-5 / 0-1), warp yarn (0 -1 / 1-0 / 1-0 / 0-1) and knitted fabrics having a knitting structure of weft yarn (7-6 / 13-13 / 6-6 / 0-0) were knitted. As materials for the loop yarn, warp and weft, loop yarn: polyester (56T, 24), warp: polyester (22T, 1), weft: polyester (22T, 1) were used. The knitting conditions were 1 in 2 out, Course: 8 / cm, Wales: 3.7 / cm, and the basis weight of the knitted fabric was 14 g / m ² . Using the obtained knitted fabric, a surface fastener female material was obtained in the same manner as in Example 1. A schematic diagram of the knitted structure in the knitted fabric of the obtained surface fastener female material is shown in FIG. 5A, and a schematic diagram of the pattern of the knitted structure is shown in FIG. 5B shows the state of the loop yarn formed in the knitted fabric (one loop on the left and right sides) observed when the knitted fabric is cut along the line BB in FIG. 5A (perpendicular to the warp direction). FIG.

(Example 3)
Using a three-ply knitting machine (made by KARL MAYER), tricot pile knitting, loop yarn (6-5 / 11-10 / 5-6 / 0-1), warp yarn (0-1 / 1-0 / A knitted fabric having a knitting structure of 1-0 / 0-1) and weft (4-3 / 7-7 / 3-4 / 0-0) was knitted. As materials for loop yarn, warp and weft, loop yarn: polyester (56T, 24), warp: polyester (22T, 1), weft: polyester (22T, 1) were used. The knitting conditions were 1 in 2 out, Course: 8 / cm, Wales: 3.7 / cm, and the basis weight of the knitted fabric was 12 g / m ² . Using the obtained knitted fabric, a surface fastener female material was obtained in the same manner as in Example 1. The structure of the knitted structure in the knitted fabric of the obtained surface fastener female material and the state of the loop yarn formed on the knitted fabric were the same as in Example 1.

Example 4
Using a three-ply knitting machine (made by KARL MAYER), tricot pile knitting, loop yarn (6-5 / 11-10 / 5-6 / 0-1), warp yarn (0-1 / 1-0 / A knitted fabric having a knitted structure of 1-0 / 0-1) and weft (3-2 / 5-5 / 2-3 / 0-0) was knitted. As materials for loop yarn, warp and weft, loop yarn: polyester (56T, 24), warp: polyester (22T, 1), weft: polyester (22T, 1) were used. The knitting conditions were 1 in 1 out, Course: 8 / cm, Wales: 5.5 / cm, and the basis weight of the knitted fabric was 25 g / m ² . Using the obtained knitted fabric, a surface fastener female material was obtained in the same manner as in Example 1. FIG. 7A shows a schematic diagram of the knitting structure in the knitted fabric of the obtained surface fastener female material, and FIG. 8 shows a schematic diagram of the pattern of this knitting structure. 7B shows the state of the loop yarn formed on the knitted fabric (one loop on the left and right sides) observed when the knitted fabric is cut along the line CC in FIG. 7A (perpendicular to the warp direction). FIG.

(Comparative Example 1)
Using a three-ply knitting machine (made by KARL MAYER), tricot pile knitting, loop yarn (3-2 / 5-4), warp yarn (1-0 / 0-1), weft yarn (0-0 / 5) A knitted fabric having the knitting structure of -5) was knitted. As materials for loop yarn, warp yarn and weft yarn, loop yarn: polyamide (44T, 11 pieces), warp yarn: polyamide (22T, 1 piece), weft: polyamide (22T, 1 piece) were used. The knitting conditions were 1 in 1 out, Course: 10.4 / cm, Wales: 5.5 / cm, and the basis weight of the knitted fabric was 21 g / m ² . Using the obtained knitted fabric, a surface fastener female material was obtained in the same manner as in Example 1. FIG. 9 is a schematic diagram showing the state of the loop yarn formed on the knitted fabric (one loop on each side) observed when the knitted fabric is cut in a direction perpendicular to the warp direction of the knitted fabric.

(Evaluation of female surface fastener)
(Engagement force)
A 25 mm wide male material (CS-600, manufactured by Sumitomo 3M Limited) was placed on the surface fastener female material obtained in the above-described Examples and Comparative Examples, and pressure-bonded with a 2 kg roller. Next, the female material and the male material were pulled horizontally with a force of 1 kg to engage them. The engaged surface fastener female material and male material were pulled in the vertical direction at a pulling speed of 300 mm / min, and the peeling force when peeling was measured to determine the engaging force (N / 25 mm). The engagement force is the engagement force (right engagement force) when the engaged female material and male material are peeled from the right to the left in the width direction (that is, the direction perpendicular to the CD direction and the warp direction). And, the engaging force (left engaging force) at the time of peeling from the left to the right was measured 6 points each, and the average value of all 12 points was obtained. The results are shown in Table 2.

(Direction of engagement force)
From each measurement value of the right engagement force and the left engagement force measured as described above, according to the following formula:
{(Average value of right engagement force measured at 6 points) − (Average value of left engagement force measured at 6 points)} / (Average value of all measured values (12 points) of right engagement force and left engagement force) )
Was obtained as an absolute value and used as the engaging force directionality. The closer the obtained value is to 0, the smaller the left-right difference in engagement force. The results are shown in Table 2.

(Interlayer strength)
Set the surface knitted fabric knitted fabric and base material bonded with adhesive to 25 mm between the chucks, and pull the knitted fabric from the base material at a pulling speed of 300 mm / min. The tensile strength was measured using a Tensilon tensile tester to obtain the interlayer strength (N / 25 mm). The results are shown in Table 2.

(Tear strength (longitudinal direction))
The obtained surface fastener female material was cut into about 100 mm (MD) × 50 mm (CD), and as shown in FIG. 10, a 20 mm cut 70 was put in the center of the CD direction with a blade to produce a test sample 60 (test Sample A). Another test sample was prepared in the same manner (Test Sample B). As shown in FIGS. 11A and 11B, the end portions 61a and 61b of the test sample A on the side of the cut portion 70 are fixed to a Tensilon tensile tester in which the interval between the chucks 80 is set to 20 mm, respectively, and a tensile speed of 300 mm / Test sample A was pulled 100 mm in minutes and the change in strength of test sample A was measured. The maximum value among the measured strengths was taken as the tear strength of test sample A. For test sample B, set the test sample so that the tear direction is opposite to that of test sample A (end 61b is fixed with upper chuck 80 and end 61a is fixed with lower chuck 80), The tear strength of test sample B was measured under the same tensile conditions as described above. The average value of the tear strengths of the test samples A and B was determined and used as the tear strength of the hook-and-loop fastener female material. The results are shown in Table 2.

(Loop thread protruding state)
The protruding state of the loop yarn in the surface fastener female material was visually observed. `` Good '' when the loop thread protrudes to the left and right and the right and left loop sizes are aligned, `` Yes '' when the loop thread protrudes to the left and right but the left and right loop sizes are not aligned "When the loop yarn does not protrude from side to side, it was determined as" impossible ". The results are shown in Table 2.

(Back leakage of loop yarn)
A surface fastener female material sample of 100 m × 100 mm was prepared, and the degree of back leakage of the loop yarn was visually observed. The case where the ratio of back leakage was 5% or less was judged as “excellent”, the case where it was 5-10% was “good”, and the case where it was 10-30% was judged “good”. The results are shown in Table 2.

10 face fastener female material 20 knitted fabric 21, 21 ′ warp 21a opening 21b in warp closing 22 in warp 22 weft 23 loop yarn 24, 24a, 24b, 24c knot 25 ground structure 26 for defining pattern of knitting structure Minimum unit 30 Base material 40 Male material 41 Hook 50 Surface fastener 60 Test sample 61a, 61b Test sample end portion 70 Cut portion 80 Chuck

Claims (3)

A surface fastener female material and a surface fastener having a male material,
Fastener Mesuzai is warp, weft and a knitted fabric of loop yarns, and saw including a base, the warp and weft and a loop is knitted to form the nodal progression of warps forming the nodal The direction is opposite to the direction of the loop yarn forming the knot and the direction of the weft forming the knot, and the loop yarn protrudes from the one surface of the knitted fabric alternately to the left and right with respect to the warp. Yes,
Surface Fuss Na. Warp is formed by a chain knitting pattern of 0-1 / 1-0 / 1-0 / 0-1 was repeated, the surface fastener of claim 1, wherein. The absorbent article which has a hook-and-loop fastener of Claim 1 or 2.