Waterproof stringer and waterproof slide fastener

Abstract

The waterproof stringers (2m, 2n) comprise: tapes (3m, 3n) woven from weft yarns (38) and warp yarns (39); spiral stringers (4m, 4n) sewn on the lower surfaces (31) of the tapes (3m, 3n) by sewing threads (5); and waterproof films (6m, 6n) laminated on the upper surfaces (32) of the tapes (3m, 3n). The sewing thread (5) includes a plurality of floats (52). Each floating part (52) is provided with two sinking ends (52a, 52b) which are driven by a needle (8) in the ground structure of the belts (3m, 3n) to sink into the side of the lower surface (31). The ground weave of the tapes (3m, 3n) includes a twill weave formed across the boundary (P1) between the element attachment section (33) and the tape main body section (34). The floats (52) extend so as to intersect ribs (26) and / or grooves (27) between the ribs (26) in the twill weave of the element attachment section (33). Recesses (7) are formed between the floating parts (52) corresponding to the piercing position of the needle (8). The recesses (7) may be located between adjacent ribs (26).

Description

Technical Field

[0001] The invention relates to a waterproof tooth chain belt and a waterproof zipper. Background Art

[0002] As disclosed in Patent Document 1, it is known that a waterproof film is laminated on the base fabric of a zipper tape by means of an adhesive layer to impart waterproofness to the zipper tape. In Patent Document 1, a polyurethane film is used as the waterproof film, and an aqueous polyurethane adhesive is used as the adhesive layer. Similar to Patent Document 1, Patent Document 2 relates to a zipper that is imparted with waterproofness, and in particular discloses that the chain element mounting portion of the zipper tape is set to a 1 / 1 fabric structure in order to reduce the sliding resistance of the slider related to the opening and closing operation of the zipper. In paragraph 0025 of Patent Document 2, it is explained that when the chain element mounting portion is composed of a twill fabric, poor thread fastening related to the sewing of the spiral chain element may occur. Paragraph 0053 of Patent Document 2 discloses that the chain element mounting portion and the tape body are set to a twill fabric. Patent Documents 3 and 4 disclose various fabric structures of zipper tapes.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2014 / 010019

[0006] Patent Document 2: Japanese Patent Application Publication No. 2020-65919

[0007] Patent Document 3: International Publication No. 2015 / 189918

[0008] Patent Document 4: International Publication No. 2019 / 106857 Summary of the invention

[0009] When a waterproof film is laminated on the opposite side of the spiral chain element for the ground structure of a zipper tape with spiral chain elements sewn thereon, the appearance (exterior) of the waterproof chain element may be deteriorated due to the gap between the waterproof film and the ground structure (for example, the gap is not completely filled with adhesive, and air remains there, making it look cloudy). In order to improve the appearance of such a waterproof chain element, the inventor of the present application conducted an in-depth study on the relationship between the ground structure of the zipper tape and the sewing thread, and came up with the following invention of the present application. It should be noted that even if the amount of adhesive applied is simply increased, the waterproof chain element will become hard, thereby reducing its flexibility.

[0010] A waterproof chain tape of one form of the present invention includes a zipper tape woven from at least one weft yarn and a plurality of warp yarns, a spiral chain element sewn on the zipper tape by a sewing thread in a manner arranged on the lower surface of the zipper tape, and a waterproof film laminated on the upper surface of the zipper tape on the opposite side of the spiral chain element. The zipper tape includes: a chain element mounting portion overlapping the spiral chain element in the thickness direction of the zipper tape; and a tape body portion of the remaining portion other than the chain element mounting portion. The sewing thread includes a plurality of floating portions each emerging from the ground structure of the zipper tape to the upper surface of the tape, and each floating portion has two sunken ends sunk into the lower surface side of the zipper tape by a needle inserted into the ground structure of the zipper tape. The ground structure of the zipper tape includes a twill structure formed across the boundary of the chain element mounting portion and the tape body portion. The floating portion extends in a manner intersecting the ribs of the twill structure in the chain element mounting portion and / or the grooves between the ribs. The waterproof fastener tape has a plurality of recesses formed between the floats so as to correspond to the insertion positions of the sewing needles, and the plurality of recesses include one or more recesses located between adjacent ribs.

[0011] In some embodiments, a plurality of floats are arranged in a straight line, and the ribs extend in a straight line obliquely relative to the arrangement direction of the floats. The angle formed by the arrangement direction of the floats and the extension direction of the ribs may be in the range of 10° to 30°. Alternatively, the angle may be in the range of 15° to 30° or in the range of 20° to 30°.

[0012] In some embodiments, in the image showing the concavities and convexities of the tape upper surface of the zipper tape, each of the plurality of concavities is observed to have a 0.2 mm 2 The area below is a recess.

[0013] In some embodiments, in the image showing the concave and convex portions of the upper surface of the zipper tape, the average area of ​​the plurality of concave portions is within 0.1 mm 2 ~0.2mm 2 within the range.

[0014] In some embodiments, in the image showing the concavo-convex on the upper surface of the zipper tape, the median value of the area distribution of the plurality of concave portions is within 0.3 mm 2 ~0.6mm 2 within the range.

[0015] In some embodiments, in the image showing the projections and depressions on the tape upper surface of the zipper tape, the plurality of recesses include at least one recess that is observed to be surrounded by the float and the ribs.

[0016] In some embodiments, a twill structure is formed over the entire range of the element mounting portion.

[0017] In some embodiments, the twill structure is formed over the entirety of the tape body portion except for a tape end region of the tape body portion on the opposite side to the element attaching portion.

[0018] In some embodiments, the twill weave includes a plurality of sub-regions having ribs extending in different directions.

[0019] In some embodiments, the sewing thread is thicker than the width of the warp yarns comprised by the twill weave.

[0020] In some embodiments, the following (a) and / or (b) are satisfied:

[0021] (a) The arrangement direction of the float is consistent with or parallel to the length direction of the waterproof tooth chain tape;

[0022] (b) The spiral fastener elements are sewn to the zipper tape by double lock stitching, and the sewing thread is a double lock stitch needle thread.

[0023] In some embodiments, each recess included in the plurality of recesses is at least partially filled with an adhesive used to laminate the waterproof membrane to the zipper tape.

[0024] Another aspect of the waterproof slide fastener of the present invention includes a pair of waterproof fastener tapes and a slider for engaging and disengaging the pair of waterproof fastener tapes, wherein each waterproof fastener tape of the pair of waterproof fastener tapes is any of the waterproof fastener tapes described above.

[0025] Effects of the Invention

[0026] According to one aspect of the present invention, the appearance of the waterproof fastener tape is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic partial plan view of a waterproof slide fastener according to one embodiment of the present invention.

[0028] Figure 2 It is a schematic partial bottom view of the waterproof zipper.

[0029] Figure 3 yes Figure 2 A partial enlarged view of .

[0030] Figure 4 It is a schematic cross-sectional view of the left and right waterproof fastener stringers in an engaged state, and the engaging heads of the left and right spiral elements are alternately engaged in the front-back direction.

[0031] Figure 5 This is a schematic side view of a waterproof fastener tape, schematically showing a state in which spiral fastener elements are sewn to the ground structure of the fastener tape by sewing thread.

[0032] Figure 6 This is a diagram showing the weave of the fabric of a zipper tape.

[0033] Figure 7 This is a schematic diagram showing a portion of the fabric structure of the fastener element mounting portion and the insertion position of the sewing needle.

[0034] Figure 8 This is a photo taken of the top surface of the waterproof chain. The bumps and depressions corresponding to the floating parts of the sewing thread can be observed on the left and right of the center line of the chain.

[0035] Fig. 9 This is an image obtained by observing the upper surface of the fastener tape before lamination of the waterproof film using a three-dimensional shape measuring machine, and the depth is expressed using color difference (darkness and lightness on a black and white printed paper).

[0036] Fig.10 This is a structural diagram showing the weave structure of the element attaching portion of the fastener tape of the comparative example.

[0037] Fig.11 This is a photograph of the upper surface of the waterproof chain of the comparative example, and the projections and depressions corresponding to the floating parts of the sewing thread can be observed on the left and right of the center line of the chain.

[0038] Fig.12 This is an image obtained by observing the upper surface of the fastener tape of the comparative example before lamination of the waterproof film using a three-dimensional shape measuring machine, and the depth is expressed using color difference (darkness and lightness on a black and white printed paper).

[0039] Fig.13 This is a schematic flowchart showing a method for manufacturing a waterproof fastener stringer.

[0040] Fig.14 This is a schematic process diagram for laminating waterproof membranes with waterproof chains.

[0041] Fig.15 This is a schematic process diagram of cutting the waterproof membrane stacked on the waterproof chain using a cutter. DETAILED DESCRIPTION

[0042] Various embodiments and features are described below with reference to the accompanying drawings. A person skilled in the art can combine the various embodiments and / or the various features without excessive explanation, and can also understand the complementary effects brought about by the combination. In principle, repeated descriptions between the embodiments are omitted. The reference drawings are mainly for the purpose of describing the invention and are simplified for the convenience of drawing. Each feature should be understood as a universal feature that is not only effective for the waterproof tooth chain belt and the manufacturing method related thereto disclosed in this application, but also common to various other waterproof tooth chain belts and the manufacturing methods related thereto that are not disclosed in this specification.

[0043] In this specification, the moving direction of the slider 9 for opening and closing the waterproof slide fastener 1 is referred to as the front-to-back direction (refer to Figure 1The direction parallel to the width direction of the waterproof slide fastener 1 is defined as the left-right direction (refer to Figure 1 Double-headed arrow LR). The direction parallel to the thickness direction of the waterproof zipper 1 is taken as the up-down direction. It should be noted that the up-down direction is orthogonal to the front-back direction and the left-right direction. The up-down direction does not necessarily mean the vertical direction (direction of gravity). For example, when the length direction of the waterproof zipper 1 is configured as the vertical direction, the up-down direction related to the waterproof zipper 1 is included in the horizontal direction (orthogonal to the vertical direction). In this way, the direction referenced in this specification has nothing to do with the vertical direction. It should be noted that, as described later, directions other than the front-back direction, the left-right direction, and the up-down direction are also appropriately referenced.

[0044] The waterproof zipper 1 is a long flexible strip extending in the front-to-back direction with a predetermined left-right width, and has a pair of left and right waterproof chain tapes 2m, 2n and a slider 9 for engaging and disengaging the waterproof chain tapes 2m, 2n. Similar to the waterproof zipper 1, the waterproof chain tapes 2m, 2n are also long flexible strips extending in the front-to-back direction with a constant left-right width. The left and right waterproof chain tapes 2m, 2n (specifically, the spiral chain elements 4m, 4n described later) are engaged by the advancement of the slider 9, and a waterproof seal is formed by the butt joint of the relative side edges 65 of the waterproof membranes 6m, 6n described later (see FIG. 1 ). Figure 4 ). The left and right waterproof chain belts 2m, 2n (specifically, the spiral chain elements 4m, 4n described later) are released from engagement by the retreat of the slider 9, and the butt joint of the opposite side edges of the waterproof membranes 6m, 6n is also eliminated. It should be noted that the butt joint of the opposite side edges 65 of the waterproof membranes 6m, 6n does not have high resistance to water pressure, but can achieve simple waterproofing. The butt joint of the opposite side edges 65 of the waterproof membranes 6m, 6n can also be omitted, in which case, lower waterproofing is obtained.

[0045] The waterproof fastener tape 2m, 2n has: a fastener tape 3m, 3n; a spiral fastener element 4m, 4n sewn on the fastener tape 3m, 3n by a sewing thread 5 in a manner arranged on the tape lower surface 31 of the fastener tape 3m, 3n; and a waterproof film 6m, 6n laminated on the tape upper surface 32 of the fastener tape 3m, 3n on the opposite side of the spiral fastener element 4m, 4n. The waterproof fastener tape 2m, 2n has hardness and softness corresponding to the lamination of the fastener tape 3m, 3n and the waterproof film 6m, 6n. The waterproof film 6m, 6n supports the fastener tape 3m, 3n, and the options of the ground structure of the fastener tape 3m, 3n are expanded. In some cases, a fabric structure that improves the softness of the fastener tape 3m, 3n is adopted, and the improved softness of the fastener tape 3m, 3n is compensated by the hardness of the waterproof film 6m, 6n.

[0046] The zipper tapes 3m and 3n include: a fastener element mounting portion 33 on which the spiral fastener elements 4m and 4n are mounted and overlapped with the spiral fastener elements 4m and 4n in the thickness direction of the zipper tapes 3m and 3n; and a tape body portion 34 which is the remaining portion other than the fastener element mounting portion 33. The width of the fastener element mounting portion 33 may be narrower than the tape body portion 34. The boundary P1 between the fastener element mounting portion 33 and the tape body portion 34 is parallel to the center plane CP of the waterproof zipper 1, and the boundary P1 can also be determined by a plane tangent to the reverse portion 44 of the spiral fastener elements 4m and 4n described later. The center plane CP of the waterproof zipper 1 includes an axis that determines the moving path of the slider 9, and is orthogonal to the width direction (i.e., the left-right direction) of the waterproof zipper 1. When the left and right spiral fastener elements 4m and 4n are engaged, a gap is formed between the opposite side edges 36 of the left and right zipper tapes 3m and 3n. The gap is completely or partially covered by the waterproof membrane 6m and 6n to achieve simple waterproofing.

[0047] The zipper tapes 3m and 3n are highly soft textile fabrics woven from at least one weft yarn 38 and a plurality of warp yarns 39. An automatic loom can be used to weave the zipper tapes 3m and 3n. The weft yarns 38 and the warp yarns 39 are yarns (e.g., monofilament yarns or multifilament yarns) having desired properties (denier value, color). The weft yarns 38 and the warp yarns 39 can be dyed before the zipper tapes 3m and 3n are woven, or they can be dyed after the zipper tapes 3m and 3n are woven. The weft yarn 38 brings together two weft yarn portions aligned in the weft direction and is crossed by the warp yarn 39, but it should not be limited to this form. It is also possible to set one weft yarn portion of the weft yarn 38 to be crossed by the warp yarn 39. It should be noted that since the zipper tapes 3m and 3n are textile fabrics woven from the weft yarns 38 and the warp yarns 39 as described above, water is allowed to penetrate and pass through the yarns themselves and the gaps between the yarns.

[0048] The lower surface 31 and the upper surface 32 of the fastener tapes 3m and 3n are Figure 4 Although depicted as a flat surface in the figure, it is actually a non-flat surface. All or each of the warp yarns 39 included in the fastener tapes 3m and 3n repeatedly cross the weft yarns 38 on the upper side (i.e., the tape upper surface 32 side) and cross the weft yarns 38 on the lower side (i.e., the tape lower surface 31 side). By making each of the warp yarns 39 in the width direction of the fastener tapes 3m and 3n sink and float as described above, convex and concave are formed on the tape lower surface 31 and the tape upper surface 32 in a two-dimensional manner.

[0049] The spiral fastener elements 4m and 4n are typically formed by winding a monofilament into a spiral shape, and include a continuous arrangement of units U1 composed of an upper leg 41, a lower leg 42, an engaging head 43, and a reverse portion 44 (see Figures 3 to 5). The upper leg 41 and the lower leg 42 extend in the width direction of the zipper tape 3m, 3n, and have an outer end and an inner end. The engaging head 43 extends in the up-down direction in a manner that connects the outer end of the upper leg 41 with the outer end of the lower leg 42. The reversing portion 44 bends and extends between adjacent units U1 in a manner that connects the inner end of the lower leg 42 with the inner end of the upper leg 41. It should be noted that the outer side of the tape, for a zipper tape, refers to the direction from a point located on the tape surface of the zipper tape toward a point located outside the tape surface of the zipper tape, and in some cases intersects with the relative side edge 36 (for example, orthogonal). The inner side of the tape, for a zipper tape, refers to the direction from a point located outside the tape surface of the zipper tape toward a point located on the tape surface of the zipper tape, and in some cases intersects with the relative side edge 36 (for example, orthogonal). The engagement head 43 has an engagement portion formed to be wide in the front-rear direction by plastic deformation of the monofilament, so that the left and right spiral elements 4m and 4n can be engaged.

[0050] The sewing forms of the spiral chain elements 4m and 4n sewn to the zipper tapes 3m and 3n using the sewing thread 5 can be various. Including the example in the figure, typically, the spiral chain elements 4m and 4n are sewn to the zipper tapes 3m and 3n by double-thread lock stitching or flat stitching based on the operation of the sewing machine. The needle of the sewing machine moves in the up and down direction in a manner of penetrating the zipper tapes 3m and 3n, and the curved needle of the sewing machine moves in the front-to-back direction in a manner of winding the curved needle thread around the thread loop on the lower side of the needle thread. In addition, the zipper tapes 3m and 3n and the spiral chain elements 4m and 4n are fed continuously or intermittently in the front-to-back direction by the feeding mechanism of the sewing machine. In the case of double-thread lock stitching, it is preferred to use two needles to form two stitches on the upper surface 32 of the tape, but the number of needles can be appropriately changed.

[0051] The ground structure of the zipper tapes 3m and 3n will be deformed due to the penetration of the machine needle into the zipper tapes 3m and 3n. For example, the weft yarn 38 thereof will move slightly (i.e., retreat) in the front-to-back direction (feed direction), and / or the warp yarn 39 thereof will move slightly (i.e., retreat) in the bandwidth direction (left-right direction). The feed speed of the sewing machine is set to be constant, and the machine needle penetrates the zipper tapes 3m and 3n at prescribed intervals in the length direction of the zipper tapes 3m and 3n. However, the penetration position of the machine needle will vary slightly depending on the feed accuracy, sliding and tape softness of the sewing machine. It should be noted that in the example, the machine needle is inserted and pulled out relative to the zipper tapes 3m and 3n during transport stop.

[0052] In the above case, the sewing thread 5 includes at least two different threads, namely, a needle thread 51 and a looper thread 56, which are regularly wound to fix the spiral elements 4m, 4n relative to the zipper tapes 3m, 3n. The needle thread 51 includes a plurality of floating portions 52 (see FIG. 5 ) each emerging from the ground structure of the zipper tapes 3m, 3n to the tape upper surface 32. Figure 5). Each float 52 has two sunken ends 52a, 52b that are sunken into the lower surface 31 of the zipper tape 3m, 3n with the needle 8 inserted into the ground structure of the zipper tape 3m, 3n. The plurality of floats 52 are typically arranged in a direction (i.e., a straight line) that is consistent with or parallel to the length direction of the waterproof fastener tape 2m, 2n, but are not necessarily limited to this. The waterproof fastener tape 2m, 2n has a plurality of recesses 7 formed between the floats 52, each corresponding to the insertion position of the needle 8. The recesses 7 will be described in more detail later.

[0053] In addition to the above-mentioned float 52, the needle thread 51 also includes a thread portion 53 extending downward, a thread portion 54 wound around the looper thread 56, and a thread portion 55 extending upward in order to connect the sunken ends 52a and 52b of two adjacent floats 52. That is, the needle thread 51 is a winding thread that alternates and continues with the upper thread loop including the float 52 and the lower thread loop including the thread portion 54. The thread portion 53 and the thread portion 54 are shown as being in direct contact, but they should not be limited to this form. In addition, the intertwining point 57 where the needle thread 51 and the looper thread 56 are wound is located closer to the lower leg 42 than the upper leg 41 in the up and down direction, but it is not limited to this.

[0054] By adjusting the supply amount of the needle thread 51 each time the needle 8 moves up and down, the tension of the needle thread 51 can be adjusted, and the same applies to the looper thread 56. In any case, through the mutual entanglement of the needle thread 51 and the looper thread 56, the needle thread 51 and the looper thread 56 generate a tension within a specified or specified range. As a result, in addition to the insertion of the needle 8 (the retreat from the needle 8), the ground structure of the zipper tapes 3m and 3n is also deformed by the needle thread 51 itself, for example, its weft yarn 38 is pushed and moved in the front-to-back direction (typically slightly), and / or its warp yarn 39 is pushed and moved in the left-to-right direction (typically slightly). The formation of the recess 7 described later is promoted by these local yarn movements. It should be noted that it is not necessary to drop the needle 8 for each unit U1 of the spiral chain element to entangle the needle thread 51 and the looper thread 56. For example, the needle 8 may be dropped every two or three units U1 to entangle the needle thread 51 and the looper thread 56 .

[0055] The waterproof membranes 6m and 6n are typically films of a predetermined thickness formed of a thermoplastic resin. As the thermoplastic resin, for example, at least one selected from the group consisting of polyurethane, polyester, polyethylene, polypropylene, and polyvinyl alcohol can be used. The waterproof membranes 6m and 6n are typically laminated on the zipper tapes 3m and 3n with the aid of an adhesive, but can also be laminated on the zipper tapes 3m and 3n by welding or coating. That is, the lamination of the waterproof membranes 6m and 6n on the zipper tapes 3m and 3n can also be performed by methods other than bonding. A preferred example is shown in Patent Document 1, in which the waterproof membrane includes polyurethane, and the adhesive includes an aqueous polyurethane adhesive (Patent Document 1 is incorporated by reference in its entirety into this specification).

[0056] Reference Figure 6 The ground weave of the zipper tapes 3m and 3n includes a twill weave 35 formed across the boundary P1 between the element mounting portion 33 and the belt body portion 34. Preferably, the twill weave 35 includes a plurality of ribs 26 extending across the boundary P1 between the element mounting portion 33 and the belt body portion 34. As a result, the difference in the stacking state between the ground weave of the zipper tapes 3m and 3n and the waterproof membranes 6m and 6n is difficult to appear on both sides of the boundary P1, thereby improving the uniformity of the appearance and / or the flatness of the surface of the waterproof tooth chain tapes 2m and 2n. The flatness of the surface can be obtained by calculating the surface roughness on the waterproof membranes 6m and 6n.

[0057] In more detail, the twill structure 35 includes a first region 35a formed across the boundary P1 between the element mounting portion 33 and the belt body portion 34, and a second region 35b of the remaining portion. The first region 35a includes a plurality of ribs 26 extending in a manner intersecting the boundary P1. The second region 35b includes a belt end region 35r on the opposite side of the belt body portion 34 from the element mounting portion 33, and a plurality of sub-regions 35p and 35q having different (e.g., opposite) extending directions of the ribs 26. The belt end region 35r is composed of a plain weave structure, but other structures may also be used. In the sub-region 35p, the ribs 26 extend obliquely in a manner away from the element mounting portion 33 as they extend in the warp direction. In the sub-region 35q, the ribs 26 extend obliquely in a manner approaching the element mounting portion 33 as they extend in the warp direction. That is, the ribs 26 of the sub-regions 35p and 35q are in a mirror image relationship. Thus, the softness of the ground structure can be adjusted by using sub-regions with different extending directions of the ribs 26. It should be noted that by using a twill structure, a certain hardness can be obtained while maintaining high softness.

[0058] In some cases, the entire range of the fastener element mounting portion 33 is formed of a twill weave, but it is not necessarily limited to this. In addition or instead, the entire range of the belt body portion 34 other than the belt end region 35r is formed of a twill weave, but it is not necessarily limited to this. By expanding the range of the twill weave, it is possible to ensure that the sewing thread is reliably inserted into the twill weave, and at the same time, Figure 8 and Fig.11 As can be seen from the comparison, it is possible to promote the improvement of the surface flatness of the waterproof fastener tapes 2m and 2n (and further promote the improvement of the appearance thereof). Figure 8 The fastener tapes 3m, 3n shown are formed of a twill texture throughout the entire region except for the tape end region 35r. Fig.11 The main body of the zipper tape shown does not include a twill weave, so Fig.11 As shown, the surface of the waterproof tooth chain belt is formed Figure 8 Obvious bumps and low flatness.

[0059] Figure 7 The woven fabric of the upper surface 32 of the fastener tapes 3m and 3n is shown. Figure 7 In the organization diagram, grids are arranged two-dimensionally in the row direction and the column direction. The row direction is consistent with the weft direction in which the weft yarns extend, and the column direction is consistent with the warp direction in which the warp yarns extend. It should be noted that when two weft yarn portions aligned in the bandwidth direction are spanned by the warp yarns, two weft yarn portions are contained in one grid. The number of warp yarns contained in one grid is one, but it should not be limited to this. The rectangular grid marked with hatching represents the floating portion 52 of the warp yarn 39. The ribs 26 are formed by the warp yarns 39 being continuous in an inclined direction relative to the floating portions 52 of the weft yarns 38. The extension direction D1 of the ribs 26 can be determined by connecting the front and rear center points of each floating portion 52 with a straight line. A groove 27 extending in the same inclined manner as the ribs 26 is formed between adjacent ribs 26 in the warp direction.

[0060] exist Figure 7 In the figure, the needle line 51 of a specified thickness is represented by two parallel dotted lines, and the insertion position of the needle 8 is represented by a dotted circle. There is a floating portion 52 of the needle line 51 between the dotted circles. The insertion position of the needle 8 is assumed to be within the dotted circle, but it can also be slightly deviated from the dotted circle. Figure 7 In the organization diagram of FIG. 1 , the float 52 extends in a manner intersecting the ribs 26 of the twill organization in the element mounting portion 33 (and similarly the grooves 27 between the ribs 26). In addition, since there is a position for the needle 8 to be inserted between the ribs 26 adjacent in the warp direction (for example, see FIG. Figure 7 P1 to P5, etc.), so the recess 7 is located between adjacent ribs 26. Due to the bulging of the ribs 26, the spatial size (volume) of the recess 7 is reduced, and the recess 7 is formed with a smaller area when viewed from above. On the other hand, in the case where the chain element mounting portion 33 is a plain fabric, the ribs themselves do not exist. Therefore, the recess 7 will not become small in size and area due to the ribs. In the case where the chain element mounting portion 33 is composed of a heavy plain fabric, if tension is applied to the sewing thread 5 in order to fix the spiral chain element, the weft yarn is likely to move in the warp direction and the spatial size of the recess 7 will become larger. Therefore, the same effect as in the present embodiment cannot be obtained. It should be noted that the above-mentioned recess 7 is as follows Figure 8 The waterproof chain is observed to be white and turbid when viewed from the upper surface.

[0061] In this embodiment, the waterproof fastener tapes 2m and 2n have a plurality of recesses 7 formed between the floats 52 corresponding to the insertion positions of the needles 8, and the plurality of recesses 7 include one or more (typically a plurality of) recesses 7 located between adjacent ribs 26. According to this form, the recesses 7 are formed between the floats 52 with a smaller size and a smaller area by the ribs 26 of the ground structure of the zipper tapes 3m and 3n. Thus, when the waterproof film 6m and 6n are laminated on the upper surface 32 of the zipper tapes 3m and 3n, whether or not an adhesive is used, it is possible to prevent air from remaining in the recesses 7 and causing the appearance of the waterproof fastener tapes 2m and 2n to deteriorate (for example, the recesses appear cloudy). In this way, it is possible to avoid or prevent the reduction in the yield rate due to the poor appearance of the waterproof fastener tapes 2m and 2n, and at the same time, it is possible to give the waterproof fastener tapes 2m and 2n a sense of luxury. As an additional or alternative effect, the sewing thread 5 extends along the ribs 26 (in other words, does not extend in a manner orthogonal to the ribs 26), which can reduce the degree to which the sewing thread 5 appears to float from the ground structure. As an additional or alternative effect, since the recess 7 is formed in a smaller area as described above, it is possible to use a thicker (i.e., finer) sewing thread 5 that would otherwise result in the formation of a large area of ​​the recess 7. By using a thicker sewing thread 5, it is possible to increase the installation strength of the spiral chain element or install a larger size of the spiral chain element. In some cases, the sewing thread 5 is a yarn that is larger in volume than the width of the warp yarn included in the above-mentioned twill structure, preferably a twisted multifilament yarn. Typically, the sewing thread 5 is a twisted multifilament yarn having a substantially circular cross-section. It should be noted that the ribs 26 that contribute to the small size and small area of ​​the recess 7 can be located on both sides of the recess 7 in the width direction (weft direction).

[0062] Reference Figure 8 and Fig. 9 The various effects are further described. Figure 8 This is a photo taken of the upper surface of the waterproof chain, and the convex and concave portions corresponding to the floating portions of the sewing thread can be observed on the left and right of the center plane CP of the chain. Fig. 9 This is an image obtained by observing the upper surface of the zipper tape before the waterproof film is laminated using a 3D shape measuring machine (Keyence single-lens 3D shape measuring machine (VR-3200)), and the depth is expressed using color difference (concentration difference in the case of black and white). For easier understanding, refer to the comparative example. In the comparative example, the zipper tape has a Fig.10 The weave shown is not twill. In the comparative example, the belt body also does not include twill. Fig.11 This is a photograph of the upper surface of the waterproof chain of the comparative example. Fig.12This is an image obtained by observing the upper surface of the zipper tape of the comparative example before the waterproof film is laminated using a three-dimensional shape measuring machine (the same as the embodiment), and the depth is expressed by color difference (concentration difference in the case of black and white). It should be noted that in both the embodiment and the comparative example, the waterproof membranes 6m and 6n are laminated on the zipper tapes 3m and 3n with the aid of an adhesive. In addition, except for the difference in the fabric structure of the zipper tape, the same materials and the same method are used in the embodiment and the comparative example, and the observation is performed using the same conditions and devices. It should be noted that in both the embodiment and the comparative example, sewing threads (needle threads and looper threads) thicker than the warp and weft yarns are used.

[0063] exist Figure 8 and Fig.11 In both cases, the undulations corresponding to the floating part of the needle thread were observed on the left and right sides of the center plane CP of the waterproof chain. Fig.11 In the case of a lot of floating parts, white cloudy areas appeared around them. Fig.11 In the case of a turbid liquid, the turbid liquid is not limited to the area between the floating parts, but even has a slightly longer white turbid area extending along the floating part. Figure 8 Although there is a little bit of white turbidity between the floating parts, it is different from Fig.11 In addition, Figure 8 In the experiment, there was no slightly long white turbid area extending along the floating portion.

[0064] exist Fig. 9 and Fig.12 In all cases, it can be confirmed that the recessed portion 7 is formed between the floating portions 52. Fig. 9 and Fig.12 In the figure, dotted lines are drawn along the outlines of the floats 52 adjacent to each other in the longitudinal direction, and solid lines are drawn along the outlines of the recesses 7 between these floats 52. Although dotted lines and solid lines are not drawn for all floats and recesses, they can be understood in the same way. Fig. 9 and Fig.12 By comparison, we can see that Fig. 9 The area of ​​the concave 7 observed in Fig.12 The area of ​​the concave portion observed in the figure is small. The comparison of the area can be performed using the average value of the area.

[0065] More specifically, in both the embodiment and the comparative example, two lines of stitches L1 and L2 (composed of the arrangement of the floating parts) are formed in one of the waterproof fastener tapes 2m and 2n. Fig. 9 In the embodiment, a recess 7 is formed between adjacent floats 52 on each of the stitches L1 and L2. Fig.12 In the embodiment, a small number of recesses 7 are formed on the trace L1, and a large number of recesses 7 are formed on the trace L2. Fig.12In the embodiment, even if the number and area of ​​the recesses are suppressed on one side of the stitch L1, many recesses are formed in a large area on the other side of the stitch L2, and the overall appearance of the waterproof fastener tape is deteriorated. In the embodiment, the recess 7 is formed in a small area on either stitch L1 or L2, thereby improving the appearance of the waterproof fastener tape. By changing the fabric structure of the zipper tape, the effect of improving the appearance of the waterproof fastener tape can be obtained without changing the amount of adhesive used, which has significant practical benefits. Increasing the amount of adhesive used has the risk of increasing the hardness of the waterproof fastener tape.

[0066] The rib 26 extends in a straight line obliquely relative to the arrangement direction of the float 52 (i.e., the extension direction of the stitch), and the angle θ formed by the arrangement direction of the float 52 and the extension direction of the rib 26 (i.e., D1) can be any angle within the range of 10° to 30° (in other words, an angle equal to 10°, 30° or their intermediate values) (it should be noted that the intermediate value is not limited to natural numbers such as 11°, 12°, ..., 28°, 29°). In this case, the angle difference between the float 52 and the rib 26 becomes smaller (i.e., the two are close to parallel), the flatness of the surface of the waterproof fastener tape 2m, 2n is improved, and the appearance is improved. Corresponding to the reduction of the angle of the rib 26, the softness of the zipper tape is reduced (i.e., it becomes hard), and there is a risk that the sliding resistance of the slider will increase when in contact with the zipper tape. Therefore, the above-mentioned angle θ is preferably greater than 15° or greater than 20°. Advantageously, the angle θ formed between the arrangement direction of the floats 52 and the extending direction of the ribs 26 is any angle in the range of 15° to 30° or in the range of 20° to 30°.

[0067] The number of warp yarns contained in a unit width (eg, 4 mm) is appropriately set for setting the angle of the rib 26. In some cases, 12 to 20 warp yarns, preferably 14 to 18 warp yarns are introduced into the unit width of 4 mm of the element attaching portion 33.

[0068] The three-dimensional shape measuring machine obtains Fig. 9 The following features can be read from the image (specifically, the image showing the concavo-convexity of the upper surface 32 of the zipper tapes 3m and 3n before the waterproof films 6m and 6n are laminated). Of course, even after the waterproof films 6m and 6n are laminated, the same optical observation can be performed by peeling off the waterproof films 6m and 6n using an appropriate solvent. Depending on the type and setting of the three-dimensional shape measuring machine, the same optical observation can be performed without peeling off the waterproof films 6m and 6n.

[0069] (a) Each (or all) of the plurality of recesses is observed to have a 0.2 mm 2The concave portion has an area of ​​less than 100 mm. This feature is the result of the space of the concave portion being reduced due to the bulging of the ribs. The possibility of filling the concave portion with adhesive without increasing the amount of adhesive used is increased, which can be attributed to the improvement of the appearance of the waterproof fastener tape.

[0070] (b) The average area of ​​multiple recesses is 0.1 mm 2 ~0.2mm 2 Thus, it is promoted to improve the appearance of the waterproof fastener belt more effectively.

[0071] (c) The median value of the area distribution of multiple concave areas is 0.3 mm 2 ~0.6mm 2 Thus, it is promoted to improve the appearance of the waterproof fastener belt more effectively.

[0072] (d) At least one concave area surrounded by a floating portion and ribs is observed. Fig. 9 In the embodiment, the concave part surrounded by the solid line on the stitch L1 is surrounded by the float 52 located at the front and rear in the warp direction and the rib 26 located at the left and right in the weft direction. Fig.12 No concave areas surrounded by the floating parts and ribs as described above were observed. Fig. 9 It can also be determined by images other than images or observation using a microscope.

[0073] Advantageously, all the recesses 7 are at least partially filled with an adhesive for laminating the waterproof films 6m, 6n to the fastener tapes 3m, 3n, but the present invention is not limited thereto. It is also conceivable that some of the recesses in the group of recesses 7 are not filled with an adhesive at all. For example, in the manufacture of the waterproof slide fastener 1, a waterproof fastener tape as an intermediate product is sometimes partially removed for the installation of the slider 9. No adhesive is applied to such a removed portion or a smaller amount of adhesive is applied, and as a result, the waterproof fastener tape may have a partially deteriorated appearance.

[0074] Finally, a method for manufacturing the waterproof fastener tape will be briefly described. Fig.13 This is a schematic flowchart showing a method for manufacturing a waterproof fastener stringer. Fig.14 This is a schematic process diagram for laminating waterproof membranes with waterproof chains. Fig.15 This is a schematic process diagram of cutting the waterproof membrane stacked on the waterproof chain using a cutter.

[0075] First, a zipper tape is woven using weft yarns and warp yarns (S1). Advantageously, except for the tape end area of ​​the tape body 34, the entire tape is formed by a twill weave. The twill weave can include multiple areas with different ribbed directions as described above. Next, the spiral chain elements are sewn onto the zipper tape (S2). For this purpose, an industrial sewing machine can be used. The spiral chain elements are sewn onto the zipper tape by double-thread lock stitching or flat stitching, etc. Next, a waterproof film is laminated on the zipper tape (S3). Before lamination, an adhesive can be applied in layers to the upper surface of the zipper tape. Due to the ribs 26, many recesses are formed in a small area, and the recesses are more fully filled with adhesive. The same effect can be obtained in the case of a welded waterproof film.

[0076] like Fig.14 and Fig.15 As shown, it is also possible to laminate a waterproof film on the fastener chain after the waterproof fastener tapes 2m and 2n are engaged, and then cut the waterproof film by the cutter 81 at a position on the gap between the left and right fastener tapes 3m and 3n.

[0077] Based on the above teachings, those skilled in the art can add various modifications to the various embodiments and features. The reference numerals added to the claims are for reference only and should not be used for the purpose of limiting the interpretation of the claims.

[0078] Description of Reference Numerals

[0079] 1: Waterproof zipper

[0080] 2m, 2n: Waterproof tooth chain belt

[0081] 3m, 3n: zipper tape

[0082] 4m, 4n: spiral teeth

[0083] 5: Sewing thread

[0084] 6m, 6n: waterproof membrane

[0085] 7: Concave

[0086] 8: Needle

[0087] 9: Slider

[0088] 26: Ribbed

[0089] 27: Slot

[0090] 31: With lower surface

[0091] 32: Bring the surface

[0092] 33: Chain tooth installation part

[0093] 34: With main body

[0094] 35: Twill weave

[0095] 35p: Sub-area

[0096] 35q: Sub-region

[0097] 35r: band end area

[0098] 38: Weft

[0099] 39: Warp

[0100] 51: Needle thread

[0101] 52: floating part

[0102] 52a: Sinking end

[0103] 52b: sinking end.

Claims

1. A waterproof fastener tape, comprising: a zipper tape (3m, 3n) woven from at least one weft yarn (38) and a plurality of warp yarns (39); spiral fastener teeth (4m, 4n) sewn on the zipper tape (3m, 3n) by sewing threads (5) in a manner arranged on a lower surface (31) of the zipper tape (3m, 3n); and a waterproof film (6m, 6n) laminated on an upper surface (32) of the zipper tape (3m, 3n) on the opposite side of the spiral fastener teeth (4m, 4n), The zipper tape (3m, 3n) comprises: a fastener element mounting portion (33) overlapping the spiral fastener elements (4m, 4n) in the thickness direction of the zipper tape (3m, 3n); and the remaining portion of the belt body (34) other than the element mounting portion (33), The sewing thread (5) includes a plurality of floating portions (52) each emerging from the ground structure of the zipper tape (3m, 3n) onto the tape upper surface (32), each floating portion (52) having a needle (8) inserted into the ground structure of the zipper tape (3m, 3n) and two sunken ends (52a, 52b) sunk into the tape lower surface (31) side of the zipper tape (3m, 3n), The waterproof fastener belt (2m, 2n) is characterized in that: The ground structure of the zipper tape (3m, 3n) includes a twill structure formed across the boundary (P1) between the fastener element mounting portion (33) and the tape body portion (34). The floating portion (52) extends in a manner intersecting the ribs (26) in the twill structure of the fastener element mounting portion (33) and / or the grooves (27) between the ribs (26). The waterproof toothed chain belt (2m, 2n) has a plurality of recesses (7) formed between the floats (52) corresponding to the insertion positions of the machine needles (8), and the plurality of recesses (7) include one or more recesses (7) located between adjacent ribs (26).

2. The waterproof fastener belt according to claim 1, characterized in that: The plurality of floating parts (52) are arranged in a straight line, The ribs (26) extend in a straight line at an angle relative to the arrangement direction of the floats (52). The angle formed by the arrangement direction of the floats (52) and the extension direction of the ribs (26) is within the range of 10° to 30°.

3. The waterproof fastener belt according to claim 1 or 2, characterized in that: In the image showing the concavities and convexities of the tape upper surface (32) of the fastener tapes (3m, 3n), each of the plurality of concave portions (7) is observed to have a concave surface of 0.2 mm. 2 The area below is the concave part (7).

4. The waterproof fastener tape according to any one of claims 1 to 3, characterized in that: In the image showing the concavo-convexity of the tape upper surface (32) of the zipper tape (3m, 3n), the average area of ​​the plurality of concave portions (7) is within 0.1 mm 2 ~0.2mm 2 within the range.

5. The waterproof fastener tape according to any one of claims 1 to 4, characterized in that: In the image showing the concavo-convexity of the tape upper surface (32) of the zipper tape (3m, 3n), the median value of the area distribution of the plurality of concave portions (7) is within 0.3 mm 2 ~0.6mm 2 within the range.

6. The waterproof fastener tape according to any one of claims 1 to 5, characterized in that: In an image showing the projections and depressions of the tape upper surface (32) of the fastener tape (3m, 3n), the plurality of recesses (7) include at least one recess (7) that is observed to be surrounded by the float (52) and the ribs (26).

7. The waterproof fastener tape according to any one of claims 1 to 6, characterized in that: The twill structure is formed over the entire range of the element mounting portion (33).

8. The waterproof fastener tape according to any one of claims 1 to 7, characterized in that: The twill structure is formed over the entirety of the belt main body (34) except for a belt end region (35r) of the belt main body (34) on the opposite side to the element attachment portion (33).

9. The waterproof fastener tape according to any one of claims 1 to 8, characterized in that: The twill weave comprises a plurality of sub-regions having different extending directions of the ribs (26).

10. The waterproof fastener tape according to any one of claims 1 to 9, characterized in that: The sewing thread (5) is thicker than the width of the warp yarn included in the twill weave.

11. The waterproof fastener tape according to any one of claims 1 to 10, characterized in that: Satisfy the following (a) and / or (b): (a) the arrangement direction of the floating portion (52) is consistent with or parallel to the length direction of the waterproof fastener tape (2m, 2n); (b) The spiral fastener elements (4m, 4n) are sewn onto the fastener tapes (3m, 3n) by double-thread lock stitching, and the sewing thread (5) is a needle thread of the double-thread lock stitching.

12. The waterproof fastener tape according to any one of claims 1 to 11, characterized in that: Each recess (7) included in the plurality of recesses (7) is at least partially filled with an adhesive for laminating the waterproof membrane (6m, 6n) to the fastener tape (3m, 3n).

13. A waterproof zipper, characterized in that: A pair of waterproof toothed chain belts (2m, 2n) and a slider (9) for engaging and releasing the pair of waterproof toothed chain belts (2m, 2n) are provided. Each waterproof fastener tape (2m, 2n) of the pair of waterproof fastener tapes (2m, 2n) is the waterproof fastener tape (2m, 2n) according to any one of claims 1 to 12.

Images