JP5594513B2 - Molded male surface fastener that can be sewn - Google Patents

Description

  The present invention relates to a molded male surface fastener that can be attached to a fabric by sewing such as a sewing machine or hand-sewn and has high engagement force.

  Conventionally, as a male surface fastener that can be attached to a fabric by sewing such as a sewing machine or hand-sewn, a so-called male type in which a hook-like engagement element made of monofilament is erected on the surface of a base fabric made of woven fabric or knitted fabric Woven surface fasteners and male knitted surface fasteners are known. In the case of this hook-and-loop fastener, the hook-type engaging element of the male hook-and-loop fastener engages with the loop-shaped engaging element of the female hook-and-loop fastener, so that the male hook-and-loop fastener and the female hook-and-loop fastener are pulled. Become.

  However, in the case of these male type woven surface fasteners and male type knitted surface fasteners, thick monofilaments are used as hook-like engaging elements, and these monofilaments are woven or knitted into the base fabric of the surface fastener. Therefore, a thick monofilament exists in the base fabric, and further, a fixing resin is applied to the back surface of the hook-and-loop fastener so that the monofilament is not pulled out from the base fabric. The base fabric is extremely hard and soft to the touch. Further, when touching the skin, the end of the thick monofilament irritates the skin.

  On the other hand, in contrast to such woven surface fasteners and knitted surface fasteners, so-called molded males in which mushroom-type engaging elements made of the same resin are erected on the surface of a substrate made of a thermoplastic resin such as polypropylene, nylon or polyester. Mold surface fasteners are also known, but in the case of these molded surface fasteners, the substrate made of resin is hard, and sewing needles and hand-sewn needles cannot easily penetrate the substrate. Therefore, the molded surface fasteners are sewn on the fabric. Can not be attached. A molded male surface fastener with a thin substrate is also available on the market, but the needle penetrates but the needle hole is widened so that the seam is easy to avoid and sufficient sewing strength cannot be obtained.

When a thermoplastic elastomer such as polyurethane or styrene-based elastomer is used as the resin that forms such a molded surface fastener, the sewing needle and hand-sewn needle can easily penetrate the substrate, so it is molded by sewing. Although it is considered possible to attach the hook-and-loop fastener to the fabric, if the hook-and-loop fastener is pulled when the hook-and-loop fastener is disengaged, there is a problem that the substrate is easily torn from the perforations and seams, and the heat A male engagement element made of a plastic elastomer has a low engagement force, and a method of attaching a molded surface fastener to a fabric by a sewing machine, hand-sewing, or the like has not been adopted at all.
More specifically, for example, in Patent Document 1, a molded surface fastener obtained by extrusion molding using a specific polyurethane has excellent flexibility and tear strength, and further, other thermoplastic elastomers such as polyamides. It is described that it is excellent in repeated detachability as compared with a molded fastener formed from an elastomer or a polyester elastomer.

JP-A-4-224703

  However, this document does not describe at all about attaching a molded surface fastener obtained from these thermoplastic elastomers to a fabric by sewing, and in fact, using these thermoplastic elastomers, a conventional general extrusion molding method is used. When the molded surface fastener is manufactured by the above method, when the obtained molded surface fastener is attached to the fabric by sewing, the stitch direction and the extending direction of the molded surface fastener are the same. The problem of easy tearing occurred, and it was practically impossible to attach the molded surface fastener to the fabric by sewing.

  As a result of research on a molded surface fastener that can be attached to a fabric by sewing, the present inventors have found that a molded male surface fastener manufactured by a specific manufacturing method using a specific elastomer resin is attached to the fabric by sewing. It has been found that the hook-and-loop fastener is not easily torn from the stitches produced by sewing, the engagement force is sufficiently high, and the touch is gentle, and the present invention has been reached.

  That is, an object of the present invention is a molded male surface fastener that can be attached to a fabric by sewing, and even if the surface fastener is repeatedly engaged and disengaged after the attachment, the same surface fastener is torn from the seam. It is an object of the present invention to provide a soft molded male surface fastener that is rare and has a sufficiently high engaging force and is soft to the touch.

The present invention achieves the above object. Specifically, mushroom-type engaging elements are arranged in a row on the surface of the substrate, and each mushroom-type engaging element has a stem portion (S) and its part. The umbrella portion (M) extends from the stem portion (S) in the direction (Q direction) that extends from the upper portion and intersects the engagement element row direction. In the molded male surface fastener having the same width from the stem portion (S) to the tip of the umbrella portion without expanding the umbrella portion (M) in the (P direction), the substrate and the mushroom The resin constituting the mold engaging element is both a polyester elastomer, and the width (W) of the engaging element row direction of each stem portion and the distance (L) between the engaging elements adjacent in the engaging element row direction the ratio of the (W: L) of 1: 0.7 to 1: 1.3 range der Ru formed Katachiyu type surface fastener It is molded male surface fastener sewed fabric, characterized in that attached to the fabric by manufacturing.

Preferably, W: L is in the range of 1: 0.8 to 1: 1.2. Further, preferably a case the density of the engaging elements is 70 to 140 pieces / cm ^2. Preferably, the height (H) of the mushroom-type engagement element from the substrate is 0.5 to 1.1 mm. Further preferably, the polyester elastomer is obtained by using terephthalic acid or a derivative thereof as a dicarboxylic acid component and 1,4-butanediol and poly (oxytetramethylene) glycol or a derivative thereof as a diol component. Yes, and the ratio of [poly (oxytetramethylene)] terephthalate group in the polyester elastomer is 40 to 70% by weight. And this invention is a case where the said shaping | molding male surface fastener is attached to the fabric by sewing.

The present invention also provides a mushroom-type engaging element array that is continuously extruded in a longitudinal direction on a substrate by extruding a melt of a polyester elastomer from a nozzle having a mushroom-type slit on one side of a slit extending in a straight line. A tape having a strip is obtained, and a cut is formed in the mushroom-type engagement element row of the tape in a direction transverse to the length direction from the tip portion to the root portion of the mushroom-type engagement element row, and This is a method for producing a molded male surface fastener sewing fabric in which a molded male surface fastener obtained by stretching and heat treatment so as to have a draw ratio in the range of 1.7 to 2.3 times is attached to the fabric by sewing .

  According to the present invention, the molded male surface fastener of the present invention can be attached to the fabric by sewing, and after the attachment, even if the surface fastener is repeatedly engaged and disengaged, such as a sewing machine or hand-sewn The same surface fastener is less likely to tear from the seam, the engagement force is sufficiently high, and a soft molded surface fastener that is gentle to the touch can be obtained.

The perspective view which shows a part of suitable example of the shaping | molding male surface fastener of this invention. The front view of a suitable example of the nozzle for extrusion used in order to manufacture the shaping | molding male surface fastener of this invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 1 and 2.
A preferred example of the molded male surface fastener of the present invention is a surface fastener as shown in FIG. In the male surface fastener of FIG. 1, mushroom-type engaging elements are erected in a row on a substrate. In FIG. 1, two rows of mushroom-type engaging element rows exist in parallel to the substrate length direction (P direction). Although only two rows are shown in FIG. 1, there are actually several rows to several tens rows of engagement element rows in parallel with the described mushroom type engagement elements.
As is clear from FIG. 1, all the mushroom-type engaging elements are erected on the board substantially perpendicularly from the board, and each mushroom-type engaging element has a stem portion (from the base portion (board)) ( S) and an umbrella part (M) whose upper part spreads on both wings like an umbrella when viewed from the engagement element row direction (P direction).

  In such a molded male surface fastener, the most characteristic feature of the present invention is that a specific elastomer resin called a polyester elastomer is used as a constituent resin. Examples of the thermoplastic elastomer include a polyurethane resin, a styrene resin, a polyamide resin, a polyolefin resin, a soft vinyl chloride resin, and the like in addition to the polyester elastomer. It was found that tears from stitches caused by hand-sewing are less likely to occur.

  Polyester elastomer is a resin in which polyoxytetramethylene glycol is copolymerized with a resin whose main repeating unit is a butylene terephthalate unit. Despite being high, it is a resin that has sufficient properties of an elastic polymer. In the present invention, the ratio of [poly (oxytetramethylene)] terephthalate groups in the polyester elastomer is preferably 40 to 70% by weight, more preferably 50 to 60% by weight.

  However, simply using such a polyester elastomer is insufficient to prevent tearing from stitches such as sewing machines and hand stitches. The inventors of the present invention have found that the stretch conditions when producing a molded male surface fastener by extrusion greatly influences the ease of tearing from the seam. That is, under the stretching conditions that are generally performed in the past, the loop-like engagement element can be sufficiently engaged with the mushroom-type engagement element, and in order to further increase the strength of the hook-and-loop fastener substrate, A method is used in which a line is formed in the engagement element row and is stretched at a stretch ratio of about 3 times. According to the research results of the present inventors, when the stretch is performed about 3 times, a sewing machine is used. It is not possible to prevent the molded surface fastener from tearing easily from stitches such as seams and hand stitches, and it is necessary to stretch about twice as much as the conventional stretch ratio to prevent tearing from the stitches. I found out.

  As described above, when stretching and heat treatment are performed so as to obtain a stretching ratio of about 2 times, specifically 1.7 to 2.3 times, the width (W ) And the distance (L) between the engagement elements adjacent in the engagement element row direction (W: L) is in the range of 1: 0.7 to 1: 1.3. More preferably, W: L is in the range of 1: 0.8 to 1: 1.2.

Furthermore, in the case of a molded male surface fastener made of polyester elastomer, the mushroom-type engaging element is an elastomer resin, so that when the engaging element is applied with force, the engaging element easily tilts and the loop element becomes The engagement force tends to be low because it is easily detached from the mushroom-type engagement element, but in the present invention, in order to compensate for this, the engagement element density is increased to 70 to 140 pieces / cm ² compared to the conventional product. It is understood that this engaging element density is considerably higher than the engaging element density of 30 to 60 pieces / cm ^{2 of} a molded surface fastener that has been generally employed in the past. In the present invention, more preferably, the engaging element density is 90 to 120 / cm ² .

  Furthermore, in the present invention, since the engaging element is made of a polyester elastomer, the engaging element is easily tilted when a force is applied to the mushroom type engaging element, and the loop element is easily detached from the mushroom type engaging element. In order to reduce the inclination of the mushroom-type engagement element, in addition to increasing the density of the engagement element, the height (H) of the engagement element is made higher than the conventional one. It is preferable to make it low. Specifically, a molded surface fastener manufactured by conventional extrusion molding generally has an engagement element height in the range of 1.2 to 2.0 mm. It is preferable to make it lower than the conventional value of -1.1 mm, and more preferably in the range of 0.7-0.9 mm.

  As described above, the molded male surface fastener of the present invention is composed of a substrate made of a thermoplastic resin and a large number of mushroom-type engaging elements made of the same resin. The thickness of the substrate is preferably in the range of 0.1 to 0.4 mm, particularly 0.2 to 0.3 mm. In addition, the width of the substrate (the width in the Q direction orthogonal to the engagement element row) is preferably 5 to 200 mm, particularly preferably 10 to 100 mm. If it is too wide, it will be difficult to cut the engagement element rows at high speed.

  In the present invention, each mushroom-type engaging element is composed of a stem portion (S) and an umbrella portion (M) extending above the stem portion (S), and the umbrella portion (M) in a direction perpendicular to the engaging element row direction (Q direction). Is extended from the stem portion (S), but the umbrella portion (M) does not have an extension in the engaging element row direction (P direction), and extends from the stem portion (S) to the tip of the umbrella portion. It has almost the same width (W). In such a structure, a manufacturing method described later, that is, a polyester elastomer is extruded from a slit-like nozzle to form a tape-like object having a plurality of engagement element rows on a substrate, and the engagement element rows are formed. In addition, it is formed by making a cut from the tip to the root in the direction intersecting it and extending it, and has such a structure for obtaining a high engagement force with the loop element. is important.

  In the present invention, the length (X) of the expanding portion of the umbrella portion of each mushroom-type engaging element is in the range of 0.4 to 0.9 mm, particularly 0.5 to 0.7 mm in terms of engagement force and feeling of touch. Is preferable. Considering that the length (X) of the expanding portion of the umbrella portion of the engaging element of the molded male surface fastener manufactured by general extrusion molding is 1.0 to 1.6 mm, It can be said that the shape of the engaging element constituting the surface fastener is extremely small. By forming such small engagement elements on the substrate at a high density, both the engagement force and the feeling of touch can be satisfied.

  Further, the width (W) of the stem portion constituting the mushroom type engagement element of the surface fastener of the present invention in the engagement element row direction is in the range of 0.25 to 0.35 mm, particularly 0.28 to 0.33 mm. Is preferred. Further, the interval between the stem portions, that is, the interval (Y) between adjacent engaging element rows is preferably in the range of 0.5 to 1.5 mm, particularly 0.8 to 1.2 mm. As an interval (L) between adjacent mushroom-type engaging elements in the (P direction), W: L needs to be 1: 0.7 to 1: 1.3, and in particular, W: L is 1: A range of 0.8 to 1: 1.2 is preferred. When the W: L ratio is smaller than 1: 0.7, the stretching is performed insufficiently, so that the loop engaging element only engages with the mushroom type engaging element. In other words, the substrate is not sufficiently stretched (that is, the distance between the mushroom-type engaging elements), and the substrate is hardly stretched. If it is large, the substrate is easily torn according to the stitches due to molecular orientation by stretching.

The stem width (T) in the direction orthogonal to the engaging element row direction (Q direction) is preferably in the range of 0.2 to 0.5 mm, particularly 0.3 to 0.4 mm, and adjacent engaging elements. The distance (Z) between the umbrellas between the rows is preferably in the range of 0.2 to 1.2 mm, particularly 0.5 to 0.9 mm. Furthermore, it is preferable that 10 to 40%, particularly 20 to 25% of the height (H) of the engaging element is the umbrella portion.
Satisfying these sizes and ranges is preferable for achieving the engagement force, the ease of engagement, and the feeling of touch, and the difficulty of tearing the substrate.

  Furthermore, in the present invention, there are 5 to 15, preferably 6 to 10, mushroom-type engagement element arrays per 1 cm of substrate width [the width of the substrate in the direction orthogonal to the mushroom-type engagement element array (Q direction)]. Is preferred. If the amount is too small or too large, the engagement force decreases.

In the present invention, the engaging element is manufactured by a method described later, but the thickness in the engaging element row direction tends to be thicker in the vicinity of the root of the stem than in the middle part of the stem. In such a case, the dimension said by this invention means the length in the intermediate part of the height of a stem part.
The dimensions and intervals of the engagement elements described above are average values of 10 values such as arbitrarily selected engagement elements or between engagement elements.

In the hook-and-loop fastener of the present invention, it is preferable that the cross-sectional area of each stem portion in the direction parallel to the substrate at the intermediate portion of the stem portion height of the engaging element is 0.05 to 0.20 mm ² . When the cross-sectional area is less than 0.05 mm ² , the engaging element is easily bent, and in some cases, the umbrella portion of the engaging element is cut from the stem. On the other hand, if it exceeds 0.20 mm ² , the stem is too thick, which causes a reduction in engagement force. The cross section referred to here is a cross section of the intermediate portion of the stem height in a plane parallel to the substrate of the stem portion of the engaging element.

Next, a method for producing the molded male surface fastener of the present invention will be described.
First, a polyester elastomer is melt-extruded from a nozzle (10) having a slit as shown in FIG. 2, cooled, and the mushroom-like engagement is continued on the surface of the substrate upright with respect to the substrate and in the length direction. A tape-like product having a plurality of rows having a combined element cross section is formed. In FIG. 2, 11 is a linear slit that will form a substrate, and 12 is a slit that will form a mushroom-type engaging element. When the slits of FIG. 2 are used, a tape-like object is obtained in which nine mushroom-like engagement element lines standing upright on the substrate surface are present at equal intervals. As described above, the number of rows is suitably 5 to 15 per 1 cm of the tape width after stretching, and preferably 6 to 10 as described above.

  A polyester elastomer is used as the thermoplastic resin used for the hook-and-loop fastener. The polyester elastomer is obtained by copolymerizing [poly (oxytetramethylene)] terephthalate units with polyester having butylene terephthalate as a main repeating unit. Accordingly, the monomers constituting the polyester elastomer are terephthalic acid or a derivative thereof, 1,4-butanediol or a derivative thereof, and poly (oxytetramethylene) glycol or a derivative thereof. A small amount may be copolymerized. Examples of such copolymer components include isophthalic acid, sulfoisophthalic acid soda, naphthalene-2,6-dicarboxylic acid, cyclohexanedicarboxylic acid, adipic acid, sebacic acid, and other aromatic, alicyclic, and aliphatic dicarboxylic acids, Diols such as ethylene glycol, trimethylene glycol and diethylene glycol, oxycarboxylic acids represented by hydroxybenzoic acid, poly (oxypropylene) glycol, poly (oxyethylene) glycol, poly (oxyethyleneoxypropylene) glycol, poly (ε -Caprolactone) glycol, polybutylene adipate diol and the like.

  Among them, terephthalic acid or a derivative thereof is used as a dicarboxylic acid component, and 1,4-butanediol and poly (oxytetramethylene) glycol or a derivative thereof are used as a diol component, and in a polyester elastomer [Poly (oxytetramethylene)] A polyester elastomer having a proportion of terephthalate groups of 40 to 70% by weight is preferred for preventing tearing from the seam, and more preferably, the proportion is 50 to 60% by weight. .

  The molded male surface fastener of the present invention may be formed of a polyester elastomer alone, but other resins such as polyolefin resin, polyester resin, polyamide resin, vinyl chloride resin, ethylene-vinyl. Alcohol copolymers may be blended with elastomer resins such as polyolefin elastomers, styrene elastomers, polyamide elastomers, polyurethane elastomers, etc. In addition, plasticizers, various stabilizers, weathering agents, etc. Crosslinking agents, antibacterial agents, fillers, flameproofing agents, colorants, antistatic agents, reinforcing materials, conductive agents, and the like may be added.

  Next, the engagement element rows existing on the surface of the obtained tape-like material are cut from the tip to the vicinity of the root at small intervals in a direction crossing the length direction of the row, preferably in a direction orthogonal thereto. The interval between the cuts is suitably 0.2 to 0.5 mm, particularly 0.3 to 0.4 mm. Next, the tape-like material is stretched in the length direction. As the draw ratio, a degree in which the length of the tape-like material after stretching is 1.7 to 2.3 times the length of the original tape-like material is employed. As described above, as a condition for producing a hook-and-loop fastener by extrusion molding, the stretching ratio employed in the present invention is extremely low, considering that the stretching has generally been about 3 times. It can be said that the draw ratio is low. By performing such low-stretching, the hook-and-loop fastener can be prevented from tearing from the stitches. By this stretching, the cuts made in the rows are expanded, and the rows become a row of a large number of independent engaging elements.

  In the hook-and-loop fastener of the present invention, means for sewing is used to attach to the fabric. Usually, in the case of woven surface fasteners and knitted surface fasteners, the method of attaching to the fabric by sewing is used, but in the case of molded surface fasteners, the resin used is too hard for the sewing needle to penetrate In the case where the resin used is soft, there is a problem that the hook-and-loop fastener is torn from the seam, and therefore the method of attaching the molded hook-and-loop fastener to the fabric by sewing is not used at all. According to the present invention, it has become possible to attach a molded surface fastener, which has conventionally been considered impossible, to a fabric by sewing. As a sewing method, either a method using a sewing machine or hand-sewing may be used.

  In order to further increase the attachment strength to the fabric by sewing, the knitted or knitted fabric or non-woven fabric made of polyester fiber, for example, polybutylene terephthalate fiber, is used at the ear portion (sewing location) of the hook-and-loop fastener of the present invention to be sewn. It is also possible to use a method in which the upper and lower sides are covered with a polyester-based fiber, for example, a woven or knitted fabric made of polybutylene terephthalate fiber, and a sewing machine is applied to the upper and lower sides so as to sandwich the ear portion. It is.

The molded male surface fastener of the present invention has an effect that it can be attached to the fabric by sewing, and since the molded male surface fastener is formed from a soft elastomer, it is extremely flexible and soft to the touch. Furthermore, since the engaging element is smaller than conventional hook-and-loop fasteners, the engaging portion is thinned and the gap is narrowed, and the engaging force is sufficiently high, so that clothing, particularly outerwear, sports clothing, and underwear It is suitably used for varieties, shoes, bags, etc.
As described above, the molded male surface fastener of the present invention is intended to be attached to a fabric by sewing. However, other methods than sewing, for example, an adhesive or an adhesive, or a substrate or a plastic by fusing substrates are used. Even when it is attached to products, leathers, etc., since it is flexible, soft to the touch and has high engagement force, it also includes those attached to fabrics or other things by methods other than sewing.

Hereinafter, the present invention will be described in more detail with reference to examples.
In the examples, regarding the peel durability (engagement force), the initial values of the tensile shear strength and the peel strength when using Kuraray Fastening Co., Ltd. loop woven surface fastener E50000 as the mating partner. And the value after repeating the engagement peeling 2000 times were measured (the measurement method conformed to JIS L 3416). The number of samples at the time of measurement was 10, and the average value of 10 samples was taken as the value itself.

  Regarding the seam tensile strength, the seam tensile strength in the direction perpendicular to the engaging element row is determined by inserting a seam from the end of the sample to the end at the center of the sample in the direction perpendicular to the engaging element row, and the engaging element row. By pulling at a pulling speed of 300 mm / min parallel to the direction, the seam tensile strength in the direction of the engaging element row is set so that a stitch is inserted from the end of the sample to the end in the center of the sample parallel to the engaging element row. And by pulling at a pulling speed of 300 mm / min perpendicular to the engaging element row direction. In addition, the sample width at the time of measuring is 25 mm. At this time, as a method of putting the stitches, JUKI sewing machine HZL-220-Z was used, needle # 14 and sewing thread # 30 were used, and the stitch pitch was 2 mm. . The number of samples at the time of measurement was 10, and the average value of 10 samples was used as the value itself. And about the measurement conditions other than the above of tensile strength, it measured by JISL3416.

Example 1
Polyester elastomer as a resin (Hytrel 5577 manufactured by Toray DuPont Co., Ltd .: an elastomer obtained from terephthalic acid, 1,4-butanediol and poly (oxytetramethylene) glycol, with a ratio of [poly (oxytetramethylene)] terephthalate groups of 50 2), and a melt of the same resin is extruded at 260 ° C. from a nozzle similar to the nozzle shown in FIG. 2 (however, there are 40 slits that will form a mushroom-type engagement element), and immediately cooled in cold water To form a tape-like article having 40 rows of engaging element rows on the surface, and perpendicular to the tape length direction from the top to the root of 40 rows of engaging element rows of the tape-like article. In the direction of 0.32 mm, and stretched 2.0 times at 180 ° C. in the tape length direction. 85 ° C., fixed for 1 minute heat to obtain a molded male surface fastener.

The obtained molded male surface fastener has mushroom-type engaging elements arranged in a line on the surface of the substrate, and each mushroom-type engaging element has a stem portion (S) and an umbrella portion (M) extending above the stem portion (S). The umbrella portion (M) extends from the stem portion (S) in a direction (Q direction) intersecting with the engagement element row direction, but is expanded in the engagement element row direction (P direction). (M) had a shape having substantially the same width from the stem part (S) to the tip part of the umbrella part without having an expansion.
The number of engagement element rows is 40, the thickness of the substrate is 0.26 mm, the height of the engagement element (H) is 0.71 mm, and the distance between the engagement elements adjacent in the direction of the engagement element row (L). Is 0.33 mm, the stem width (W) in the engagement element row direction is 0.32 mm, the stem width (T) in the direction orthogonal to the engagement element row direction is 0.37 mm, and between the stem portions of adjacent engagement element rows The distance (Y) of the engaging element is 1.1 mm, the length (X) of the expanding portion of the umbrella portion of the engaging element is 0.60 mm, and the engaging element row direction width (W) of the stem portion is adjacent to the element row direction. The ratio (W: L) to the distance (L) between the combined elements was 1.0: 1.0. And the space | interval (Z) between the umbrella parts of an adjacent engaging element row | line | column was 0.9 mm, and the engaging element density was 108 pieces / cm < ² >.

When the obtained molded male surface fastener is attached to a cotton cloth having a basis weight of 200 g / m ^{2 under} the above-described conditions using the above-described sewing machine, it is easily attached in both the engaging element row direction and the direction perpendicular thereto. I was able to. And the hook-and-loop fastener was not easily torn from the perforations and seams generated by sewing, and the engaging force was sufficiently high, and the touch was also gentle.
In addition, as a result of measuring the seam tensile strength by the above-described method, the tensile strength in the engaging element row direction when the seam is put in the direction perpendicular to the engaging element row is 41.6 kg / 25 mm width. The tensile strength in the direction perpendicular to the engaging element array direction when the seam was put in parallel to the element array was 9.6 kg / 25 mm width, which was an excellent level with no practical problems. Regarding the peel durability, the shear strength is 1.6 kg / cm ² for the first time, 1.4 kg / cm ² after 2000 times, and the peel strength is 105 g for the first time 120 g / cm and after 2000 times. The fluff of the mating partner fabric (E50000) after peeling 2000 times was almost inconspicuous.

Comparative Example 1
In Example 1, a molded male surface fastener was produced by the same method except that the draw ratio was 3.0. The ratio (W: L) of the engagement element row direction width (W) of the stem portion of the obtained surface fastener to the interval (L) between the engagement elements adjacent in the element row direction is 1.0: 2. 0.0. When the obtained molded male surface fastener was attached to a cotton cloth using a sewing machine in the same manner as in Example 1, it could be easily attached in both the engaging element row direction and the direction perpendicular thereto, and Engagement force was sufficiently high and soft to the touch, but the tensile strength in the direction perpendicular to the engagement element row direction when the seam was put in parallel to the engagement element row was 1.5 kg / 25 mm width. It was extremely low and could not withstand practical use.

Comparative Example 2
In Example 1, a molded male surface fastener was produced by the same method except that the draw ratio was 1.5 times. The ratio (W: L) between the engagement element row direction width (W) of the stem portion of the obtained surface fastener and the interval (L) between the engagement elements adjacent in the element row direction is 1.0: 0. .50. When the obtained molded male surface fastener was attached to a cotton cloth using a sewing machine in the same manner as in Example 1, it could be easily attached in both the engaging element row direction and the direction perpendicular thereto, and Although the touch was also gentle, the engaging force was low (first shear strength of 0.1 kg / cm ² , peel strength of 20 g / cm), and it was not practical.

Comparative Example 3
In Example 1, a molded male surface fastener was produced in the same manner as in Example 1 except that a styrene elastomer (Septon CE003 manufactured by Kuraray Co., Ltd.) was used as the resin to be used. The ratio (W: L) between the engaging element row direction width (W) of the stem portion of the obtained surface fastener and the interval (L) between the engaging elements adjacent in the element row direction is 1.0: 1. 0.0. When the obtained molded male surface fastener was attached to a cotton cloth using a sewing machine in the same manner as in Example 1, it could be easily attached in both the engaging element row direction and the direction perpendicular thereto, and the touch was also good. Although it was gentle, the engagement force was low (shear strength initial 0.1 kg / cm ² , peel strength 30 g / cm), and the seam tensile strength was also related to the case where the seam was put in parallel with the engagement element row. The tensile strength in the direction perpendicular to the element array direction was as extremely low as 2.5 kg / 25 mm width, and it was not practical.

Comparative Example 4
In Example 1, a molded male surface fastener was produced in the same manner as in Example 1 except that polypropylene was used as the resin to be used. The ratio (W: L) between the engaging element row direction width (W) of the stem portion of the obtained surface fastener and the interval (L) between the engaging elements adjacent in the element row direction is 1.0: 1. 0.0. When the obtained molded male surface fastener was attached to a cotton cloth using a sewing machine in the same manner as in Example 1, the substrate was hard and the sewing needle could not penetrate constantly, and was suitable for smooth sewing. I could not say. Further, the substrate and the engaging element are hard, and the flexibility of the sewn product is impaired, and the touch is also bad.

Example 2
In Example 1, a molded male surface fastener was produced by the same method except that the draw ratio was 1.85 times. The obtained hook-and-loop fastener has the same shape as that of Example 1, and the distance between the engagement element row direction width (W) of the stem portion and the engagement elements adjacent in the element row direction ( L) (W: L) was 1.0: 0.85. When the obtained molded male surface fastener was attached to a cotton cloth using a sewing machine in the same manner as in Example 1, it could be easily attached in both the engaging element row direction and the direction perpendicular thereto, and The engaging force was sufficiently high and the touch was also gentle. Further, the tensile strength in the engaging element row direction when the seam is put in the direction perpendicular to the engaging element row is 40.5 kg / 25 mm width, and the engaging element row when the seam is put in parallel with the engaging element row. The tensile strength in the direction perpendicular to the direction was 12.5 kg / 25 mm width. Of the peel strength, the initial shear strength was 0.7 kg / cm ² and the initial peel strength was 70 g / cm, which was slightly lower than that of Example 1, but it was sufficiently practical.

Example 3
In Example 1, a molded male surface fastener was produced by the same method except that the draw ratio was 2.25 times. The obtained hook-and-loop fastener has the same shape as that of Example 1, and the distance (L) between the engagement element row direction width (W) of the stem portion and the engagement elements adjacent in the element row direction (L ) (W: L) was 1.0: 1.25. When the obtained molded male surface fastener was attached to a cotton cloth using a sewing machine in the same manner as in Example 1, it could be easily attached in both the engaging element row direction and the direction perpendicular thereto, and The engaging force was sufficiently high and the touch was also gentle. Further, the tensile strength in the engagement element row direction when the seam is put in the direction perpendicular to the engagement element row was 44.5 kg / 25 mm width, but the engagement when the seam was put in parallel with the engagement element row The tensile strength in the direction perpendicular to the element array direction was 7.0 kg / 25 mm width, which was slightly lower than that of Example 1, but was sufficiently practical. Of the peel strength, the shear strength was 1.9 kg / cm ² and the peel strength was 150 g / cm, which was slightly higher than that of Example 1.

Example 4
In Example 1, the resin used is a polyester elastomer Hytrel 6377 manufactured by Toray DuPont Co., Ltd. (an elastomer obtained from terephthalic acid, 1,4-butanediol and poly (oxytetramethylene) glycol [poly (oxytetramethylene) A molded male surface fastener was produced by the same method except that the proportion of methylene)] terephthalate group was changed to 70% by weight. The obtained hook-and-loop fastener had the same shape and dimensions as those in Example 1.
When the obtained molded male surface fastener was attached to a cotton cloth in the same manner as in Example 1, it could be easily attached in both the engaging element row direction and the direction perpendicular thereto. As in the case of Example 1, the hook-and-loop fastener was not easily torn from the perforations and seams generated by sewing, and the engaging force was sufficiently high.

In addition, as a result of measuring the seam tensile strength by the method described above, the tensile strength in the engagement element row direction when the seam is put in the engagement element row in a direction perpendicular to the engagement element row is 43 kg / 25 mm width and parallel to the engagement element row. The tensile strength in the direction perpendicular to the direction of the engaging element row when the seam was inserted was 10 kg / 25 mm, which was slightly higher than that of Example 1. As for the peel durability, the shear strength is 2.2 kg / cm ² for the first time, 1.2 kg / cm ² after 2000 times, and the peel strength is 165 g / cm for the first time and 90 g after 2000 times. The fluff of the mating partner fabric (E50000) after peeling 2000 times was almost inconspicuous.

S: Stem portion of the engaging element,
M: Umbrella portion of the engaging element,
H ... engaging element height,
L ... the interval between the engaging elements adjacent in the engaging element row direction,
W: Stem width in the engagement element row direction,
T: Stem width in a direction orthogonal to the engagement element row direction,
Y: an interval between stem portions of adjacent engaging element rows,
X ... the length of the spreading part of the umbrella part of the engaging element,
Z: an interval between umbrella portions of adjacent engaging element rows,
8 ... opening of bag,
9: The folded portion of the bottom sheet,
10 ... nozzle for extrusion,
11 ... linear slit that will form the substrate,
12 ... a slit that will form a mushroom-type engagement element;

Claims (6)

Mushroom-type engaging elements are arranged in a row on the surface of the substrate, and each mushroom-type engaging element is composed of a stem portion (S) and an umbrella portion (M) extending above the stem portion, and in the engaging element row direction The umbrella part (M) extends out of the stem part (S) in the intersecting direction (Q direction), but the umbrella part (M) does not expand in the engaging element row direction (P direction). In the molded male surface fastener having substantially the same width from the stem portion (S) to the tip portion of the umbrella portion, both the substrate and the resin constituting the mushroom-type engaging element are polyester elastomers, and The ratio (W: L) between the engagement element row direction width (W) of the stem portion and the interval (L) between the engagement elements adjacent in the engagement element row direction is 1: 0.7 to 1: 1. 3 ranges der Ru formed Katachiyu type surface fastener is characterized in that attached to the fabric by sewing molding Type surface fastener sewn fabric. The molded male surface fastener sewing fabric according to claim 1, wherein W: L is in the range of 1: 0.8 to 1: 1.2. ^2. The molded male surface fastener sewn fabric according to claim 1, wherein the density of the mushroom-type engaging elements is 70 to 140 pieces / cm ² . The molded male surface fastener sewing fabric according to claim 1, wherein the height (H) from the substrate to the tip of the mushroom-type engaging element is in the range of 0.5 to 1.1 mm. The polyester elastomer is obtained by using terephthalic acid or a derivative thereof as a dicarboxylic acid component, and using 1,4-butanediol and poly (oxytetramethylene) glycol or a derivative thereof as a diol component. The molded male surface fastener sewing fabric according to claim 1, wherein the ratio of [poly (oxytetramethylene)] terephthalate group in said is 40 to 70% by weight. A tape-like material having mushroom-type engaging element rows continuously on the substrate by extruding a molten polyester elastomer from a nozzle having a mushroom-type slit on one side of a slit extending in a straight line. The mushroom-type engagement element row of this tape-like material is cut in a direction transverse to its length direction from the tip portion to the root portion of the mushroom-type engagement element row, and the tape is The manufacturing method of the shaping | molding male surface fastener sewing fabric which attaches the shaping | molding male surface fastener obtained by extending | stretching and heat-processing so that it may become 1.7 to 2.3 time extension to a cloth by sewing .

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