JP6846196B2 - Fastener tape and fastener stringer - Google Patents

Description

The present invention relates to a fastener tape and a fastener stringer used for a slide fastener, and in particular, a fastener tape woven by a ground warp and a weft and a core cord having a higher heat shrinkage rate than the ground warp is woven as a warp. Regarding fastener stringers.

A pair of left and right fastener tapes woven are used for the slide fastener. A fastener chain is formed by attaching a plurality of synthetic resin or metal fastener elements to the opposite tape side edges of the left and right fastener tapes. A slider that opens and closes the fastener chain is inserted through the element row of the fastener chain. Further, a first stopper (also referred to as an upper stopper) is provided at the front end of the element row, and a second stopper (also referred to as a lower stopper) or a butterfly rod is provided at the rear end of the element row. A box rod and an open / detachable insertion tool provided with a box body are provided. Thereby, a slide fastener is formed.

The synthetic resin fastener element is formed by injection molding the synthetic resin material in a state where the fastener tape is sandwiched between molds having a cavity space corresponding to the shape of the fastener element, so that the tape side edge (element) of the fastener tape is formed. It is molded into a mounting part). On the other hand, in the metal fastener element, for example, after inserting the tape side edge portion of the fastener tape between the pair of legs of the element element having a substantially Y shape, the pair of legs of the element element are brought closer to each other. By pressing and plastically deforming (so-called crimping), the tape is fixed to the side edge of the tape.

The fastener tape has a tape main part sewn on a fastener-attached product such as clothing, and an element attachment part arranged along one side edge of the tape main part. Further, the element mounting portion is provided with a core cord portion in order to increase the adhesive strength of the fastener element to the fastener tape. This core cord portion is formed by weaving a core cord thicker than the ground warp yarn of the tape main body portion and at the same time weaving the tape as warp yarns along the tape length direction.

Further, for example, when molding a fastener element made of synthetic resin on a fastener tape, after weaving the fastener tape, steps such as a heat setting step, a dyeing step, and a drying step are sequentially performed on the fastener tape, and then the fastener tape. The injection molding process of the fastener element is performed. In this case, since heat and force are applied to the fastener tape in each process, various deformations such as contraction or expansion in the warp and weft directions are likely to occur.

In order to smoothly open and close the slide fastener by sliding the slider smoothly, it is preferable that the fastener chain in which the left and right fastener stringers are combined has a straight shape in the length direction. However, in reality, thermal deformation occurs due to heating in each of the above-mentioned processes and element injection molding processes performed on the fastener tape, and when the fastener chain or slide fastener is sewn to clothes, the fastener tape is used. It is difficult for the fastener chain to maintain a straight shape due to deformation such as sewing shrinkage (sometimes referred to as seam puckering) that occurs.

In particular, in the element injection molding step, the element mounting portion of the fastener tape is sandwiched between dies and the element is injection molded in a state where a large tension is applied in the tape length direction. Therefore, the element mounting portion does not shrink to the original state even when the tension is released after injection molding, and tends to be longer in the tape length direction than the tape main portion. As a result, in the fastener stringer in which the fastener element is molded, a so-called reverse packer form in which the element mounting portion protrudes outward in a convex shape and the entire stringer is curved in a bow shape is likely to occur.

Further, when the manufactured slide fastener is sewn to a fastener-attached product such as clothing, the sewn fastener tape is more likely to be deformed into the form of a reverse packer as described above. For example, when a slide fastener is sewn on a garment, the garment is usually sewn together using a sewing machine with the garment overlaid on the fastener tape. In general, clothes are flexible and easily expand and contract, but fastener tapes for slide fasteners are formed so as to hardly expand and contract for reasons such as maintaining the mounting pitch of fastener elements.

Therefore, when the fastener tape and the garment are sewn together using the sewing machine, the garment is sewn in the stretched state by the sewing machine, but the fastener tape is hardly stretched, so that the slide fastener is sewn on the stretched garment. It will be. However, since the garment shrinks and returns to the original length after the slide fastener is sewn, the tape main part to which the fastener tape is sewn is pulled as the garment shrinks. As a result, the tape main portion of the fastener tape is held in a state of being shorter in the tape length direction than the element mounting portion, so that the fastener tape is deformed into a bow-shaped inverted packer.

Further, when a sewing machine for sewing a slide fastener, for example, a sewing machine having a lower feed method (that is, a sewing machine that feeds fabric only by lower feed teeth), which has the most standard feed method, is placed on the fastener tape and the fastener tape. The stacked clothes are fed one by one by the lower feed dog. In this case, when feeding by the lower feed dog, the fastener tape tends to be fed more than the clothes, and the sewing deviation occurs for each stitch between the fastener tape and the clothes, and the tape main part of the fastener tape is taped. It was sewn onto the garment in a state of being further shortened in the length direction, and the form of the reverse packer of the fastener tape was sometimes further increased.

Then, when the fastener tape is sewn on the clothes in the form of a reverse packer as described above, the slidability of the slider in the slide fastener is lowered, the meshing strength is lowered, the appearance quality is lowered (the appearance is deteriorated), and the like. May cause problems.

To deal with such a problem, for example, Japanese Patent Application Laid-Open No. 2002-209613 (Patent Document 1) has a tape main portion and an element attachment portion in which a core cord is woven, and the core cord is a warp of the tape main portion. Fastener tapes having a higher heat shrinkage rate have been disclosed.

In the fastener tape (tape for slide fastener) described in Patent Document 1, there is a difference between the heat shrinkage rate of the core string woven into the element mounting portion and the heat shrinkage rate of the warp threads arranged in the tape main part. Therefore, after weaving the fastener tape in a straight form, a heat setting step of heating the fastener tape to a predetermined temperature is performed (furthermore, dyeing while heating the fastener tape following the heat setting step). By performing the process), the core cord of the element mounting portion can be heat-shrinked more than the warp of the tape main portion. As a result, the fastener tape has a form (referred to as a packer form or a normal packer form) in which the element mounting portion is curved in a bow shape so as to be recessed inward.

In a fastener stringer obtained by attaching a fastener element to such a packer-type fastener tape, the fastener tape has a regular packer form or is straight (or substantially straight) in the tape length direction. Has a morphology. Therefore, when the slide fastener is sewn on the clothes, even if the tape main part of the fastener tape is attached in a contracted state with respect to the clothes, the fastener tape is deformed into the form of the reverse packer as described above. Prevents and is sewn onto clothing straight in the length direction of the tape. Therefore, it is possible to prevent the above-mentioned problems from occurring and to smoothly open and close the slide fastener by sliding the slider.

Japanese Unexamined Patent Publication No. 2002-209613

When performing the dyeing and weaving process on the fastener tape, the fastener tape that is continuous in the length direction is wrapped around the cylindrical beam in a direction slightly inclined with respect to the circumferential direction of the beam, and then wrapped around the fastener tape. The dyeing process is performed by immersing the beam wrapped with the fastener tape in the dyeing solution together with the beam.

However, for example, like the fastener tape of Patent Document 1 described above, when the fastener tape has a packer form in which the element mounting portion is concavely curved inward by being heated in the heat setting process before the dyeing and weaving process. , It becomes difficult to wrap the fastener tape around the dyeing beam.

Furthermore, when the fastener tape is wrapped around the beam, the tape side edge on the ear side (the tape side edge on the opposite side of the element mounting portion) of the fastener tape may break and wrinkle, or the tape on the ear side may be wrinkled. I couldn't wrap the fastener tape neatly because the side edges were floating. As a result, the dyed fastener tape has a problem in the dyeing process that wrinkles and uneven dyeing and weaving are likely to occur.

Further, when the fastener tape has a packer form, particularly when the bending degree of the packer form is not constant in the tape length direction, it becomes difficult to convey the fastener tape straight using a conveying roller, and the dyeing process, There is a problem in transportation that it becomes difficult to smoothly supply a long length using a supply roller in a process such as a drying process and an element injection molding process.

Furthermore, in the element injection molding process, if the fastener tape has a large packer form or the bending degree of the packer form is not constant in the tape length direction, the fastener tape does not fit properly in the predetermined position of the element molding die. In addition, there is a problem in the injection molding process that hot water leaks due to the tape position shifting with respect to the mold, and problems such as the molding position of the fastener element shifting with respect to the fastener tape occur. is there.

The present invention has been made in view of the above-mentioned conventional problems, and a specific object thereof is to prevent a reverse packer form when sewn on a fastener-attached product, and to smoothly open and close the slide fastener. A fastener tape for slide fasteners that enables operation and solves the above-mentioned problems in the dyeing process, the problems in transportation, and the problems in the injection molding process due to the packer form, and the fastener tapes thereof. The purpose is to provide a fastener stringer in which a fastener element is attached to a fastener tape.

In order to achieve the above object, the fastener tape provided by the present invention has, as a basic configuration, a tape main part in which a woven structure is formed by ground warp and weft, and one side edge of the tape main part. A fastener tape for a slide fastener having an element mounting portion provided along which a core cord is woven as a warp and a core cord portion is provided. The tape main portion is the same as the core cord portion in the tape width direction. Has an ear portion provided with a plurality of the ground warp threads and a base portion arranged between the ear portion and the element mounting portion, which are arranged on the side edge portion of the tape on the opposite side, and are arranged on the core cord. , A synthetic fiber having a higher heat shrinkage rate than the ground warp yarn arranged on the base portion is used, and the ground material arranged on the base portion is used on at least one of the ground warp yarns arranged on the ear portion. A high shrinkage yarn having a higher heat shrinkage rate than the warp yarn is used, and the ground warp yarn of the base portion is in a state of being relaxed from at least one of the ground warp yarns arranged on the ear portion and the core cord. It is the most important feature that it is arranged in.

In this case, the high shrinkage yarn of the selvage portion preferably has a lower heat shrinkage rate than the synthetic fiber of the core cord.
Further, it is preferable that the two high shrinkage yarns are arranged adjacent to each other on the selvage portion.
Further, the high shrinkage yarn is arranged apart from the tape side edge on the selvage side with at least one low shrinkage yarn having a lower heat shrinkage rate than the high shrinkage yarn in between. Is preferable.

In the fastener tape of the present invention, when the fastener tape is cut to a predetermined length and the core cord, the ground warp yarn, and the weft yarn are unraveled, the ground warp yarn arranged on the base portion is the core. It is preferable to have a length dimension larger than that of the string.
Further, when the fastener tape is cut to a predetermined length and the core cord, the ground warp yarn, and the weft yarn are unraveled, the ground warp yarn arranged on the base portion is arranged on the ear portion. It is preferable to have a length dimension larger than at least one of the ground warp yarns.

The fastener stringer provided by the present invention is characterized in that a fastener element made of synthetic resin or metal is attached to the element attachment portion of the fastener tape having the above-described configuration. It is a thing.

The fastener tape according to the present invention is a woven fastener tape having a tape main portion and an element mounting portion provided with a core cord portion by weaving a core cord, and the tape main portion of this fastener tape has a plurality of tape main portions. It has an ear portion provided with a book ground warp thread and a base portion arranged between the selvage portion and the element mounting portion. Further, the ground warp yarn of the base portion is such that at least one of the ground warp yarns arranged on the selvage portion and the core cord woven into the element mounting portion, for example, the tape surface of the base portion undulates in the front and back directions. Arranged in a relaxed state.

In such a fastener tape, one tape side edge side portion where the core cord portion of the fastener tape is provided and the other tape side edge side portion where the ear portion is provided are relatively straight in the tape length direction. It is formed so as to extend, and the entire fastener tape has a straight straight (or substantially straight) shape, and at the same time, a slack (slack) in the tape length direction is provided in the base portion of the tape main body to provide a margin. Can have. In this way, there is almost no wavy state of the tape surface on both the one tape side edge side portion where the core string portion of the fastener tape is provided and the other tape side edge side portion where the ear portion is provided, and At least the base part arranged between them has a slack state in which the tape surface undulates in an uneven manner (such a state is sometimes referred to as a "middle state"), so that the fastener is fastened. It is possible to give movement in the tape length direction to the base portion of the tape main portion with respect to the core cord portion and the ear portion of the tape.

Therefore, for example, when performing a dyeing and weaving step on the fastener tape of the present invention having a linear shape as a whole as described above, the straight fastener tape can be stably wound around the beam for dyeing. At that time, it is possible to prevent the fastener tape from wrinkling and to prevent the tape side edge on the ear side from floating from the beam, so that the fastener tape can be wrapped neatly. As a result, it is possible to effectively prevent creases and uneven dyeing and weaving from occurring on the dyed fastener tape.

Further, since the fastener tape has a straight shape, the fastener tape is long when the fastener tape is conveyed by using a conveying roller or when the fastener tape is supplied to each process such as a dyeing process by using a supply roller. It can be smoothly and stably transported or supplied in length.

Further, when the element injection molding process is performed on the fastener tape of the present invention, the injection molding can be performed in a state where the straight fastener tape is firmly and stably sandwiched in a predetermined position of the element molding mold. .. Therefore, it is possible to prevent problems such as hot water leakage and misalignment of the fastener element that occur when injection molding is performed on the fastener tape in the form of a packer, for example.

That is, according to the fastener tape of the present invention, the above-mentioned problems in the dyeing process, the problems in the transportation, and the problems in the injection molding process, which have occurred in the case of the conventional fastener tape having a packer form, are solved. can do.

Further, the fastener tape of the present invention has a straight shape, and as described above, a slack (a state in which the ground warp threads are loosened) is intentionally provided in the base portion of the tape main body portion. Therefore, when a fastener element is attached to the fastener tape of the present invention to form a fastener stringer, and then the fastener stringer (or fastener chain) is sewn to a fastener-attached product such as clothing using a sewing machine. The base portion of the fastener tape can easily follow the expansion and contraction of the garment that occurs during sewing, thereby preventing the fastener tape after sewing from being deformed into the shape of a reverse packer as a whole. Further, by using a bottom feed type sewing machine, even if a sewing deviation occurs between the base portion of the fastener tape and the fastener-attached product, the sewing deviation can be absorbed by the slack of the base portion. Therefore, it is possible to prevent the deformation into the reverse packer form caused by the sewing deviation.

Therefore, by using the fastener tape of the present invention, the sliding property of the slider is lowered, the meshing strength is lowered, and the appearance quality is deteriorated (deterioration of appearance) due to the deformation of the fastener tape into the reverse packer form. It is possible to smoothly open and close the slide fastener by preventing the trouble of the above.

In such a fastener tape of the present invention, a synthetic fiber having a higher heat shrinkage rate than all the ground warp yarns arranged in the base portion is used for the core cord, and at least one of the ground warp yarns arranged in the ear portion. For one, a high shrinkage yarn having a higher heat shrinkage rate than all the ground warp yarns arranged on the base portion is used. As a result, the heat setting process is performed on the woven fastener tape at a predetermined temperature, so that the core cord of the fastener tape and at least one ground warp yarn in the ear portion are combined with all the ground warp yarns in the base portion. It can be thermally shrunk to a greater extent than this, thereby stably forming the above-mentioned slack in the base portion of the fastener tape while maintaining the shape of the fastener tape in a straight straight line (or substantially linear shape). To.

In this case, since the high shrinkage yarn of the selvage portion has a lower heat shrinkage rate than the synthetic fiber of the core cord, it is possible to effectively prevent the fastener tape after the heat setting process from being in the form of a reverse packer.

Further, two high-shrink yarns are arranged adjacent to each other on the selvage portion in the tape main portion of the present invention. As a result, when the fastener tape is heat-set to heat-shrink the high-shrink yarn, the two high-shrink yarns (ground warp yarns) shrink so as to grab the weft, and the height is two with respect to the weft. It is possible to prevent the shrinking thread (ground warp thread) from slipping. As a result, the ears of the fastener tape contract stably in the tape length direction, and due to the contraction, uneven wrinkles that are cramped in the ears are formed, and the ears are locally tense. Can be effectively prevented.

Further, in the fastener tape of the present invention, the high shrinkage yarn is arranged separated from the tape side edge on the selvage side by sandwiching at least one low shrinkage yarn having a lower heat shrinkage rate than the high shrinkage yarn. Has been done. The tape side edge of the fastener tape on the selvage side is formed by entwining the loops of the weft threads with the loops of the adjacent weft threads in order. By arranging the high-shrink yarns apart from the tape side edge on the ear side with the low-shrink yarns in between, even if the high-shrink yarns shrink significantly in the heat setting process, the low-shrink yarns in between. Therefore, the influence of the large shrinkage of the high shrinkage yarn on the tape side edge on the selvage side can be suppressed to a small extent, thereby maintaining the shape of the tape side edge on the selvage side that is woven during the weaving of the fastener tape. , Can be stably held even after the heat setting process.

Further, when the fastener tape of the present invention is cut to a predetermined length, the core cord, the ground warp yarn, and the weft yarn are unraveled and their respective lengths are compared, all the ground warp yarns arranged on the base portion are the core cord. It is formed longer than at least one of the ground warp threads (high contraction thread) arranged in the ear. In this way, the ground warp yarn of the base portion is longer than the core cord and the high contraction yarn of the ear portion, so that the ground warp yarn of the base portion is relaxed so that the tape surface of the base portion undulates in the front and back directions. This state) can be created stably.

The fastener stringer provided by the present invention is formed by attaching a synthetic resin or metal fastener element to an element attachment portion of a fastener tape having the above-described configuration. In such a fastener stringer, since a slack is intentionally provided in the base portion of the tape main part, the fastener stringer or a fastener chain in which two fastener stringers are combined is used as a fastener cover for clothes or the like. As described above, it is possible to prevent the entire fastener tape from being deformed into the shape of a reverse packer when the finished product is sewn with a sewing machine. Therefore, even if the slide fastener is attached to the fastener-attached product, the opening / closing operation of the slide fastener can be stably performed by sliding the slider.

It is a partial plan view which shows typically the woven structure of the fastener tape for a slide fastener which concerns on embodiment of this invention. It is a partial plan view which shows typically the woven structure of the fastener tape immediately after weaving. It is a top view which shows the slide fastener formed by using the fastener tape of this invention. It is a partial plan view which shows typically the woven structure of the fastener tape which concerns on the modification of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below, and various changes can be made as long as the present invention has substantially the same configuration as the present invention and exhibits the same effects. It is possible.
For example, the materials of the ground warp yarn, the core cord, and the weft yarn forming the fastener tape will be specifically described below, but these materials are not particularly limited in the present invention. Further, in the present invention, the woven structure of the fastener tape is not particularly limited.

Here, FIG. 1 is a partial plan view schematically showing the woven structure of the fastener tape according to the present embodiment, and FIG. 2 is a partial plan view schematically showing the woven structure of the fastener tape immediately after weaving the tape. Is. The woven fabric structure in these figures is shown roughly for illustration purposes, and the actual fastener tape is formed with a more precise structure.

Further, in the following description, the front-rear direction means the length direction or the warp thread direction of the fastener tape. The left-right direction refers to the tape width direction or the weft direction of the fastener tape, and refers to a direction parallel to the tape surface of the fastener tape and orthogonal to the tape length direction. The vertical direction refers to the front and back directions of the tape orthogonal to the tape surface of the fastener tape.

The fastener tape 1 of the present embodiment is woven by a plurality of ground warp yarns 10 and core cords 20 arranged along the tape length direction and continuous weft yarns 30 by using a narrow loom called a needle loom. It is formed by a narrow strip.

The weft thread 30 is in a state where two threads are aligned as a set by reciprocating one thread in the opening of the ground warp thread 10 and the core string 20 by double pick needle weaving. It has been put in. Further, in the fastener tape 1, one loop 31 formed by the double pick weft 30 is adjacent to one tape side edge (the tape side edge on the selvage 3 side, which will be described later), which is the turning end side of the weft 30. It is formed by being entangled with the loop 31 of the weft thread 30. In this case, a false twisted yarn (textured yarn) made of 330 decitex polyester is used for the yarn forming the weft 30 in a set of two yarns.

The fastener tape 1 of the present embodiment is an element arranged on one side edge side of a tape main portion 2 which is a portion to be sewn on a fastener attached product such as clothes and a tape main portion 2 to which the fastener element 40 is attached. It has a mounting portion 5 in the tape width direction. Further, the tape main body portion 2 has an ear portion 3 arranged on the tape side edge portion on the opposite side of the element mounting portion 5 and a base portion 4 arranged between the ear portion 3 and the element mounting portion 5. Have.

The selvage portion 3 of the tape main portion 2 has a loop portion 3a formed by entwining a plurality of loops 31 of the weft threads 30 with adjacent loops 31, and a plurality of loop portions 3a extending inward in the tape width direction from the loop portions 3a. It has a loop proximity portion 3b woven by the ground warp yarn 10 and the weft yarn 30.

In particular, in the case of the present embodiment, four ground warp threads 10 are arranged (woven) in the loop proximity portion 3b of the selvage portion 3. In this case, the selvage portion 3 refers to a region in the tape width direction from the portion where the high shrinkage yarn 11 described later is arranged farthest from the loop portion 3a to the loop portion 3a, and is woven into the selvage portion 3. The number of ground warp threads 10 is not limited and can be set arbitrarily.

Four ground warp threads 10 are arranged on the selvage portion 3 of the present embodiment. In this case, the selvage yarn 10 of the selvage portion 3 is a high-shrink yarn (first selvage side warp yarn) 11 in which synthetic fibers having a higher coefficient of thermal expansion than all the selvage yarns 10 arranged in the base portion 4 are used. , It has a low shrinkage yarn (second ear side warp yarn) 12 in which a synthetic fiber having a coefficient of thermal expansion lower than that of the high shrinkage yarn 11 is used. In particular, in the case of the present embodiment, the low shrinkage yarn 12 of the selvage portion 3 uses the same synthetic fiber as the ground warp yarn 10 described later, which is arranged in the base portion 4. Further, as the high shrinkage yarn 11 of the selvage portion 3, a yarn having a coefficient of thermal expansion lower than that of the core cord 20 described later is used.

Specifically, as the high shrinkage yarn 11 of the selvage portion 3, a false twisted yarn having a dry heat shrinkage rate of 11.5% or more and 13.5% or less and made of 330 decitex polyester is used. Further, as the low shrinkage yarn 12 of the selvage portion 3, a false twisted yarn having a dry heat shrinkage rate of 6% or more and 7% or less and made of 330 decitex polyester is used.

Further, in the selvage portion 3 of the present embodiment, two low-shrink yarns 12 are arranged side by side at a position adjacent to the loop portion 3a, and 2 is further arranged inside the tape of the low-shrink yarn 12 (closer to the base portion 4). The high shrinkage threads 11 of the book are arranged side by side.

Therefore, the two high shrinkage yarns 11 are arranged apart from the loop portion 3a with the two low shrinkage yarns 12 sandwiched between them. Further, in the present embodiment, the two high shrinkage yarns 11 are arranged alternately with respect to the weft yarn 30, that is, when one high shrinkage yarn 11 is arranged on the weft yarn 30, the other height. The shrink yarn 11 is woven so as to be arranged under the weft yarn 30.

By arranging the high-shrinkage yarn 11 and the low-shrinkage yarn 12 of the selvage portion 3 in this way, after weaving the fastener tape 1, the heat-setting step described later is performed to obtain both of the two high-shrinkage yarns 11. The weft yarn 30 can be largely contracted in the tape length direction while holding the weft yarn 30 between the highly contracted yarns 11. At the same time, the two low-shrink yarns 12 can be contracted at a smaller rate than the high-shrink yarn 11, and the selvage portion 3 can be contracted stepwise toward the loop portion 3a.

This prevents the high-shrink yarn 11 from slipping and shrinking with respect to the weft 30, without causing uneven wrinkles or locally tense portions in the selvage portion 3 of the fastener tape 1. The selvage portion 3 can be contracted more stably in the tape length direction than the base portion 4 as described later without breaking the shape of the tape side edge on the selvage portion 3 side.

In the present invention, the number of high-shrinkage yarns 11 and the number of low-shrinkage yarns 12 arranged on the selvage 3 can be arbitrarily changed, and only one or a plurality of high-shrinkage yarns 11 of the selvage 3 can be changed. It is also possible to form using.

A plurality of ground warp threads 10 are arranged as base warp threads 13 in the base portion 4 of the tape main portion 2 of the present embodiment, and the number of base warp threads 13 in the base portion 4 is the tape width of the fastener tape 1 to be formed. It is set according to the dimension of the direction. For example, the base portion 4 of the present embodiment is formed by using 44 base warp threads 13.

The same synthetic fiber is used for each of the base warp threads 13 (ground warp threads 10) of the base portion 4. Specifically, false twisted yarn having a dry heat shrinkage rate of 6% or more and 7% or less and made of 330 decitex polyester is used for the warp yarns 10 of the base portion 4. The false twisted yarn of the base warp yarn 13 is the same yarn as the low shrinkage yarn 12 arranged on the selvage portion 3. In the present invention, it is also possible to use different threads for the ground warp thread 10 of the base portion 4 and the low shrinkage thread 12 of the ear portion 3.

The element mounting portion 5 of the present embodiment is a region in the tape width direction in which the fastener element 40 of the fastener tape 1 is attached, and the element mounting portion 5 corresponds to the size and shape of the fastener element 40. It is formed from the side edge of the tape arranged on the side opposite to the ear portion 3 of the fastener tape 1 with a predetermined tape width dimension.

The element attachment portion 5 of the present embodiment is eliminated by dissolving the core cord portion 6 formed by weaving the two core cords 20 as warp yarns and the ground warp yarns with a liquid (water) as described later. A warp exclusion region 7 formed only by the weft 30 is provided.

In this case, the warp exclusion region 7 is arranged between the core string portion 6 and the tape main portion 2. By providing the warp exclusion region 7, the amount of synthetic resin that penetrates the element mounting portion 5 in the tape front direction when the fastener element 40 is injection-molded can be increased, and the adhesive strength of the fastener element 40 to the element mounting portion 5 can be increased. Can be increased.

The two core strings 20 of the present embodiment are woven into the tape front side and the back side of the fastener tape 1 so as to be lined up in the front and back directions of the tape. Each core string 20 includes a core thread (core material) 21 arranged at the center of the shaft, and a leather thread portion 22 knitted around the core thread 21 using a plurality of knitting threads so as to wrap the core thread 21. Such a core cord 20 is sometimes called a knit cord.

In this case, the core yarn 21 is a 560 decitex multifilament yarn in which a plurality of polyester fibers are bundled. The core yarn 21 has a higher coefficient of thermal expansion than all the ground warp yarns 10 (base warp yarns 13) arranged in the base portion 4, and specifically, dry heat shrinkage of 17% or more and 18% or less. Have a rate. Further, the leather thread portion 22 is knitted around the core thread 21, and can expand and contract along the core thread 21 according to the expansion and contraction of the core thread 21.

Further, a plurality of ground warp threads 10 are arranged on the element mounting portion 5. The ground warp threads 10 arranged on the element mounting portion 5 are arranged on the tape inner side (tape main body portion 2 side) of the core string portion 6 and on the first mounting portion side warp threads 14 and on the core string portion 6. It has a second attachment portion side warp yarn 15 arranged on the tape side edge side (the side opposite to the tape main portion 2 side).

Two warp threads 14 on the first mounting portion side are arranged on each of the left and right sides of the warp exclusion region 7, and a total of four warp threads are arranged. Since the two warp threads 14 on the left side of the first attachment portion are arranged between the core string portion 6 and the warp exclusion region 7, even if the warp exclusion region 7 is formed, the core cord 20 is designated. It can be woven into the position and held stably.

Further, since the two warp threads 14 on the right side of the first mounting portion are arranged between the warp exclusion region 7 and the tape main portion 2, even if the warp exclusion region 7 is formed, the tape main portion 2 is formed. It is possible to stabilize the woven structure of. In the present embodiment, at least one warp thread 14 on the first mounting portion side may be arranged on both sides of the warp exclusion region 7, and the number of warp threads 14 on the first mounting portion side can be arbitrarily changed. ..

For the first attachment portion side warp yarn 14, a synthetic fiber having a coefficient of thermal expansion lower than that of the core string 20 and the same as or higher than the base warp yarn 13 of the base portion 4 is used. In the case of the present embodiment, the first mounting portion side warp yarn 14 has the same synthetic fiber as the ground warp yarn 10 of the base portion 4, that is, has a dry heat shrinkage rate of 6% or more and 7% or less, and is made of 330 decitex polyester. False twisted yarn is used.

Further, in the element mounting portion 5 of the present embodiment, two second mounting portion side warp threads 15 are arranged on the tape side edge side of the core string portion 6. For the second mounting portion side warp yarn 15, a multifilament yarn made of polyamide (nylon), which has higher strength than polyester and is excellent in abrasion resistance, is used. By using the polyamide fiber for the second mounting portion side warp yarn 15 arranged on the outside of the core cord portion 6 in this way, the strength of the tape side edge on which the weft yarn 30 is folded back is increased, and the tape form of the fastener tape 1 is formed. Can be stabilized. Further, when the slide fastener is formed, the strength of the opposite tape side edges of the left and right fastener tapes 1 can be increased to prevent the fastener tape 1 from fraying or being damaged. In the present invention, synthetic fibers other than polyamide fibers (for example, polyester fibers) can also be used for the second mounting portion side warp yarn 15.

After weaving the tape, the fastener tape 1 of the present embodiment is subjected to a heat setting step under predetermined conditions as described later, so that the fastener tape 1 as a whole extends straight in the tape length direction. It has a linear morphology. Further, the fastener tape 1 is provided with a region between the core cord portion 6 and the portion of the ear portion 3 where the high shrinkage thread 11 is arranged (that is, the portion of the base portion 4 of the tape main portion 2 and the element attachment. The ground warp yarns 10 (that is, the base warp yarns 13 and the first attachment portion side warp yarns 14) are arranged in a relaxed state on the tape inner side portion of the core cord portion 6 of the portion 5, and the tape surface is uneven. A "middle-shaped state" is provided in which a wavy shape appears.

Specifically, in the case of the present embodiment, the core string 20 (core thread 21) used for the fastener tape 1, the high shrinkage thread 11 of the ear portion 3, and the ground warp thread 10 (base warp thread 13) of the base portion 4 are , Each having a dry heat shrinkage rate of 17% or more and 18% or less, a dry heat shrinkage rate of 11.5% or more and 13.5% or less, and a dry heat shrinkage rate of 6% or more and 7% or less, respectively. The set heat shrinkage rate for actually shrinking the fastener tape 1 is 6% or more and 8% or less, preferably 6.5% or more and 7.5% or less for the core string 20 and the high shrinkage yarn 11, and the base portion 4 has a set heat shrinkage rate. The ground warp yarn 10 is set to 4% or more and less than 6%. The first mounting portion side warp yarn 14 of the element mounting portion 5 and the low shrinkage yarn 12 of the selvage portion 3 are basically the same as the ground warp yarn 10 of the base portion 4.

That is, in the present embodiment, in the heat setting step, the core cord 20, the high shrinkage yarn 11 of the selvage portion 3, and the ground warp yarn 10 of the base portion 4 are not completely heat-shrinked, and the fibers are shrinkable. Is left. By leaving the shrinkage of the fibers in this way, the fastener tape 1 in the heat setting step can have an appropriate tape elongation. In this case, the tape elongation may be, for example, about 1% when a load of 1 kg is applied to the fastener tape 1.

Further, in the fastener tape 1 of the present embodiment, the shrinkage rate (set shrinkage rate) actually contracted in the heat setting process is adjusted to the same range of 6% or more and 8% or less for the core string 20 and the high shrinkage yarn 11. There is. By matching the actual shrinkage rate of the core cord 20 and the actual shrinkage rate of the high shrinkage yarn 11 to almost the same level in this way, even if the fastener tape 1 is heat-shrinked in the heat setting process, the entire fastener tape 1 is entirely shrinked. The morphology can be held in a straight (or nearly straight) straight line.

At the same time, the set shrinkage rate in the heat setting step is clearly set between the core cord 20 and the high shrinkage yarn 11 of 6% or more and 8% or less and the base warp 13 of the base portion 4 of 4% or more and less than 6%. It's different. As a result, the base warp thread 13 can be provided with a slack, and the base portion 4 of the fastener tape 1 can be provided with a "centered state".

In particular, in this case, by setting the set shrinkage rate of the high shrinkage yarn 11 extending over the core cord 20 to 6% or more (particularly 6.5% or more), the shrinkage rate of the core cord 20 and the high shrinkage yarn 11 and the base portion 4 By providing a clear difference from the shrinkage rate of the ground warp yarn 10 of the above, it is possible to stably provide the "centered state" on the base portion 4 of the tape main portion 2.

On the other hand, by setting the set shrinkage rate of the core string 20 and the high shrinkage thread 11 to 8% or less (particularly 7.5% or less), the fastener tape 1 is in a positive packer form (the element mounting portion 5 is curved inward in a concave shape). It is possible to stably maintain a straight and linear morphology by suppressing the morphology.

Next, a method for manufacturing the fastener tape 1 of the present embodiment as described above will be described.
First, a narrow loom is used to weave the primary tape 1a having the woven fabric structure shown in FIG. Unlike the fastener tape 1 of the present embodiment shown in FIG. 1, the primary tape 1a has a plurality of (three in the present embodiment) water-soluble vinylon or the like in the portion of the fastener tape 1 that becomes the warp exclusion region 7. The water-soluble fibers 16 are arranged as warp threads, and the fastener tape 1 and the primary tape 1a have different woven structures. Therefore, in the present embodiment, the fastener tape 1 and the primary tape 1a are represented by different reference numerals, but as in the modified example (FIG. 4) described later, for example, instead of the water-soluble fiber 16, the fastener tape 1 and the primary tape 1a are water-insoluble. When synthetic fibers (polyester fibers) are arranged, the fastener tape and the primary tape have the same woven structure.

Further, the woven primary tape 1a of the present embodiment has a linear shape extending straight in the tape length direction. In the present invention, the number of water-soluble fibers 16 arranged in the warp exclusion region 7, the fineness of the water-soluble fibers 16 and the like can be arbitrarily set according to the size of the warp exclusion region 7.

The primary tape 1a woven as shown in FIG. 2 is sent to a heat setting step and heat-treated by dry heat of 170 ° C. or higher and 185 ° C. or lower for a predetermined time. By performing this heat setting step on the primary tape 1a, the ground warp yarn 10, the core cord 20, and the weft yarn 30 of the primary tape 1a are each heat-shrinked.

At this time, the core string 20 of the primary tape 1a and the highly shrinkable yarn 11 arranged on the selvage portion 3 are thermally contracted at a contraction rate of 6% or more and 8% or less. On the other hand, the base warp thread 13 of the base portion 4, the low shrinkage thread 12 arranged on the ear portion 3, and the first attachment portion side warp thread 14 of the element attachment portion 5 heat at a shrinkage rate of 4% or more and less than 6%. Shrink.

In this way, the warp threads 10 and the core cord 20 of the primary tape 1a are thermally contracted at a contraction rate within a predetermined range, so that the core cord portion 6 and the selvage portion 3 of the fastener tape 1 have substantially the same shrinkage amount. Therefore, the shape of the tape as a whole can be stabilized by maintaining a straight linear shape (or a substantially straight shape slightly curved in the direction of normal puckering). At the same time, the shrinkage amount of the core string portion 6 and the ear portion 3 of the fastener tape 1 is larger than that of the base portion 4 of the tape main portion 2, so that the base portion 4 having a small shrinkage amount becomes slack. A "state (relaxed state)" is formed.

In the present embodiment, the tape form of the primary tape 1a after this heat setting step is substantially maintained until the element injection molding step described later. Further, in the state of the centerpiece applied to the base portion 4 of the primary tape 1a, the waviness of the tape surface may be so small that it cannot be visually recognized from the appearance of the primary tape 1a (or the fastener tape 1).

Here, as one means for determining whether or not a "centered state (relaxed state)" is formed in the base portion 4, the fastener tape 1 to which the fastener element 40 is attached is orthogonal to the length direction. The sample A was cut linearly in the direction and cut along the tape length direction at the end of the fastener element 40 on the base portion 4 side, and the sample A was cut along the tape length direction within the range of the base portion 4. Sample B and sample C cut along the tape length direction within the range of the ear portion 3 are prepared, and the respective lengths of these samples A to C in the tape length direction are measured. When measuring the length of each sample straight, if necessary, samples A to C with a load (0.1 kg to 1 kg as an example of the load) applied in the length direction. Each length of can be measured. As a result of this measurement, when a medium-sized state is formed in the base portion 4, the sample B becomes longer than the sample A and the sample C. Further, more preferably, sample B> sample C> sample A. The sample A may be cut along the tape length direction at the element mounting portion 5 instead of the edge portion on the base portion 4 side of the fastener element 40. In this case, the cutting portion can be set so that the range of 2 mm to 4 mm from the edge portion of the fastener tape 1 is approximately the edge portion on the base portion 4 side of the fastener element 40.

Next, the primary tape 1a subjected to the heat setting step is conveyed to a dyeing step in order to color a desired color, and is wound around a cylindrical beam in this dyeing step. At this time, since the primary tape 1a has a straight shape, it can be easily and smoothly conveyed from the heat setting step and supplied to the dyeing step. Further, the supplied primary tape 1a has no wrinkles on the primary tape 1a on the beam, and the tape side edge on the selvage 3 side does not float from the beam in the circumferential direction of the beam. It can be wound stably and neatly around many times in a slightly tilted direction.

The beam around which the primary tape 1a is wound is first washed by passing the beam together with hot water. By performing this hot water washing, dust and the like on the primary tape 1a are washed away, and the water-soluble fibers 16 arranged on the primary tape 1a are melted and removed. As a result, the warp exclusion region 7 is formed in the element mounting portion 5, and the fastener tape 1 having the woven fabric structure shown in FIG. 1 can be obtained.

Subsequently, the fastener tape 1 washed with hot water is dyed on the fastener tape 1 by being put into the dyeing solution together with the beam for a predetermined time. In this dyeing treatment, the beam is immersed in the dyeing solution at a temperature of 120 ° C. or higher and 140 ° C. or lower and a treatment time of 15 minutes or longer and 60 minutes or shorter, depending on the color or the like for dyeing the fastener tape 1. As a result, the entire fastener tape 1 can be dyed in a desired color without causing wrinkles or uneven dyeing and weaving on the fastener tape 1.

In the present embodiment, the ground warp yarn 10 and the core string 20 of the tape main portion 2 of the fastener tape 1 hardly shrink due to heat even after the above-mentioned hot water washing and dyeing treatment, so that the fastener tape 1 after the dyeing treatment is used. Maintains a linear morphology and a centered state. At this time, the two second mounting portion side warp threads 15 (polyamide fibers) arranged outside the core string 20 of the element mounting portion 5 are shrunk by the dyeing treatment, so that the fastener tape 1 after the dyeing treatment is , The element mounting portion 5 may have the form of a small positive packer that is slightly curved so as to be recessed inward.

At this time, the fastener tape 1 having a middle-sized state after the dyeing treatment was cut to a predetermined length, and the cut tape pieces were further loosened and separated into a core string 20, a ground warp thread 10, and a weft thread 30. In this case, all the base warp threads 13 of the base portion 4 are longer than the core cord 20 and longer than the high shrinkage yarn 11 of the selvage portion 3.
After that, the dyed fastener tape 1 is sent to a drying step and subjected to a drying treatment to produce the fastener tape 1 of the present embodiment.

Next, the manufactured fastener tape 1 is sent to an element injection molding step in order to form the fastener element 40 as shown by a virtual line in FIG.
In this molding step, the fastener tape 1 having a linear shape (or the shape of a small positive packer) is supplied to the molding die, and further, tension in the tape length direction is applied to the fastener tape 1 in the tape length direction. While the fastener tape 1 is pulled straight, the element mounting portion 5 including the warp exclusion region 7 of the fastener tape 1 is sandwiched between the molds to fasten the mold. Subsequently, the fastener element 40 is molded into the element mounting portion 5 of the fastener tape 1 by injecting a thermoplastic resin material such as polyacetal or polyamide into the cavity of the mold.

In this element injection molding step, the fastener element 40 is molded in a straight state in which tension is applied to the fastener tape 1. Therefore, injection molding is performed in a state where the core string portion 6 of the fastener tape 1 is stably fitted in the mold, and a plurality of fastener elements 40 are attached to the element mounting portion 5 in which the fastener tape 1 is not loosened. Can be molded. Therefore, the fastener element 40 having a predetermined shape can be stably molded at a predetermined position of the fastener tape 1, and problems such as hot water leakage can be prevented. Further, since the fastener tape 1 has the above-mentioned centered state and has an appropriate tape elongation, the fastener tape 1 after the fastener element 40 is formed maintains a linear shape and has a centered shape. This state is also maintained.

Further, in the element injection molding step, for example, when the fastener stringer on which the fastener element 40 is molded is removed from the mold, the molded fastener element 40 is pulled by the mold in the tape length direction, and the element of the fastener tape 1 is attached. A tensile force in the tape length direction may be applied to the portion 5 so that the fastener elements 40 are separated from each other. In this case, since the fastener tape 1 of the present embodiment has an appropriate tape elongation, even if the element mounting portion 5 is stretched by applying the above-mentioned tensile force at the time of mold release, the element mounting portion 5 is stretched after the mold release. Shrinks and the element mounting portion 5 can be returned to its original length (or a length close to the original length).

Further, in the present embodiment, since the fastener element 40 is molded in the element mounting portion 5 including the warp exclusion region 7 of the fastener tape 1, the resin material of the fastener element 40 is the weft 30 in the warp exclusion region 7 at the time of injection molding. While penetrating the warp exclusion region 7 in the front and back directions so as to wrap around the mold, the entire cavity of the mold is filled and solidified (cured). As a result, the element half portion formed on the tape front surface side of the fastener element 40 and the element half portion formed on the tape back surface side are connected so as to penetrate the warp exclusion region 7, so that the fastener tape 1 is connected to the fastener element 40. The fixing strength (mounting strength) of the fastener element 40 can be effectively improved.

The fastener stringer of the present embodiment manufactured in this manner stably has a straight linear form in the tape length direction, and has a slack in the tape central portion (base portion 4) of the fastener tape 1. The "middle state" is intentionally formed.

Then, as shown in FIG. 3, two fastener stringers 41 manufactured in this manner are combined to form a fastener chain, and a slider 42 is attached to the fastener chain to form a fastener element 40. The slide fastener 50 is manufactured by attaching the stopper 43 to the front end of the element row and further attaching the opening / detaching fitting 44 (or stopper) to the rear end of the element row.
Further, by sewing the obtained slide fastener 50 to a fastener-attached product such as clothing using a sewing machine, a product with the slide fastener 50 is manufactured.

In the slide fastener 50 of the present embodiment, the inside-out state 51 as described above is formed on the fastener tape 1 as shown in FIG. As a result, when the slide fastener 50 is sewn to the fastener-attached product, the base portion 4 of the fastener tape 1 is in the tape length direction with respect to the left and right tape side edges of the fastener tape 1 depending on the inner surface state 51 thereof. Since it is possible to move a little, the fastener tape 1 can easily follow the expansion and contraction of clothes that occurs during sewing. Further, for example, even when a bottom feed type sewing machine is used, it is possible to absorb the sewing deviation that occurs between the fastener tape 1 and the fastener-attached product in the center portion 51 of the base portion 4.

Therefore, even if the slide fastener 50 of the present embodiment is sewn to the fastener-attached product using a sewing machine, the fastener tape 1 after sewing is effectively prevented from being deformed into the reverse packer form, and the reverse packer form is formed. It is possible to prevent the occurrence of conventional defects caused by the above, that is, defects such as a decrease in the slidability of the slider 42, a decrease in the meshing strength, and a decrease in the appearance quality (deterioration of the appearance). Thereby, the opening / closing operation can be smoothly performed, and the product with the slide fastener 50 having high meshing strength can be stably provided.

In the above-described embodiment, when the fastener tape 1 is woven, the warp threads are eliminated from the element mounting portion 5 of the fastener tape 1 by using the water-soluble fiber 16 as a part of the warp threads forming the element mounting portion 5. The case where the region 7 is provided is described.

However, the present invention is not limited to this, and as shown in FIG. 4, for example, instead of the water-soluble fiber 16 of the element mounting portion 5, the base warp thread 13 and the first mounting portion side in the above-described embodiment are used. The same polyester processed yarn as the warp 14 can also be used.

In this case, by arranging the polyester processed yarns as the first attachment portion side warp yarns 14 at equal intervals between the core cord 20 and the base portion 4, the fastener tape 1b having no warp yarn exclusion region is manufactured. The fastener tape 1b manufactured in this way also has a linear shape straight in the tape length direction by being subjected to the heat setting step as in the case of the above-described embodiment, and the fastener tape 1b has a linear shape. It has a slack in the center part in the width direction.

Further, in the above-described embodiment, a case where the fastener stringer 41 is manufactured by injection molding a plurality of synthetic resin fastener elements 40 on the fastener tape 1 is described. However, in the present invention, the fastener stringer may be manufactured by plastically deforming a plurality of metal fastener elements on the fastener tape 1 by pressing.

1 Fastener tape 1a Primary tape 1b Fastener tape 2 Tape main part 3 Ear part 3a Loop part 3b Loop proximity part 4 Base part 5 Element attachment part 6 Core cord part 7 Warp exclusion area 10 Ground warp thread 11 High shrinkage thread (1st ear part) Side warp)
12 Low shrinkage thread (second ear side warp thread)
13 Base warp 14 1st mounting side warp 15 2nd mounting side warp 16 Water-soluble fiber 20 Core string 21 Core thread (core material)
22 Leather thread 30 Weft thread 31 Loop 40 Fastener element 41 Fastener stringer 42 Slider 43 Stopper 44 Opening / detaching fitting insert 50 Slide fastener 51 Middle-sized

Claims (7)

A tape main part (2) in which a woven structure is formed by a ground warp (10) and a weft (30), and a core string (20) are arranged along one side edge of the tape main part (2). It is a fastener tape (1,1b) for a slide fastener having an element mounting portion (5) woven as a core cord portion (6).
The tape main portion (2) is arranged on the tape side edge portion on the side opposite to the core cord portion (6) in the tape width direction, and the selvage portion (3) including a plurality of the ground warp threads (10). And a base portion (4) arranged between the ear portion (3) and the element mounting portion (5).
For the core cord (20), a synthetic fiber having a higher heat shrinkage rate than the ground warp yarn (10) arranged on the base portion (4) is used.
A high shrinkage yarn (10) having a higher heat shrinkage rate than that of the ground warp yarn (10) arranged on the selvage portion (3) is attached to at least one of the ground warp yarns (10) arranged on the selvage portion (3). 11) is used,
The ground warp yarn (10) of the base portion (4) is in a state of being relaxed from at least one of the ground warp yarns (10) arranged on the ear portion (3) and the core cord (20). Being arranged,
Fastener tape featuring that. The high shrinking yarns of the ear (3) (11), said synthetic fiber comprising a lower thermal shrinkage than claim 1, wherein the fastener tapes of the core thread (20). The fastener tape according to claim 1 or 2 , wherein two high-shrinkage yarns (11) are arranged adjacent to each other on the ear portion (3). The high shrinkage yarn (11) is sandwiched between the tape side edge on the selvage (3) side and at least one low shrinkage yarn (12) having a lower heat shrinkage rate than the high shrinkage yarn (11). The fastener tape according to any one of claims 1 to 3 , which is arranged by sandwiching the tape. When the fastener tape (1,1b) is cut to a predetermined length and the core cord (20), the ground warp yarn (10), and the weft yarn (30) are unraveled, the base portion (4) is subjected to. The fastener tape according to any one of claims 1 to 4 , wherein the ground warp yarn (10) to be arranged has a length dimension larger than that of the core cord (20). When the fastener tape (1,1b) is cut to a predetermined length and the core cord (20), the ground warp yarn (10), and the weft yarn (30) are unraveled, the base portion (4) is subjected to. Claims 1 to 5 wherein the arranged ground warp yarn (10) has a length dimension larger than at least one of the ground warp yarns (10) arranged on the selvage portion (3). Fastener tape described in either. A fastener element (40) made of synthetic resin or metal is attached to the element mounting portion (5) of the fastener tape (1,1b) according to any one of claims 1 to 6. Fastener stringer.

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