Double-sided colored zipper

Abstract

This utility model discloses a double-sided colored zipper, applied in the field of zipper technology. It includes two fabric strips (1) with teeth (2) and a zipper pull connected to the teeth (2). The teeth (2) are located on the reverse side of the fabric strips (1). A coloring layer (4) is provided on the front surface, the reverse surface of the fabric strips (1), and the surface of the teeth (2). The coloring layer (4) on the front surface of the fabric strips (1) forms a preset pattern (6) on the surface of the fabric strips (1). The color of the pattern (6) is lighter than the color of the coloring layer (4) on the front surface of the fabric strips (1). This double-sided colored zipper achieves clear preset pattern (6) on the front of the zipper, while coloring the fabric strips (1) and teeth on the reverse side, thus maintaining the zipper's softness and durability.

Description

Technical Field

[0001] This utility model relates to the field of zipper technology, and in particular to a double-sided colored zipper. Background Technology

[0002] With the rise of outdoor sports, the number of outdoor clothing brands is also increasing, and clothing designers want to print brand logos and other designs on zipper surfaces. Currently, the main techniques for printing designs on zipper surfaces include screen printing and heat transfer printing. While screen printing can achieve clear designs, it requires multiple base coats, increasing the thickness of the zipper, and the logo is easily scratched by repeated opening and closing of the zipper pull. Heat transfer printing, while producing clear designs, is only suitable for white fabric tape; dark fabric tape cannot transfer light-colored designs. Furthermore, while leather-like waterproof materials can be customized with logos, their high rigidity makes them suitable for outdoor jackets but not for lightweight fabrics such as golf apparel.

[0003] Therefore, how to design a double-sided colored zipper that can both ensure a clear pattern on the front and color the fabric tape and teeth on the back, while maintaining the zipper's softness and durability, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to overcome the limitations of printing patterns on the surface of zippers in the prior art, and to provide a double-sided colored zipper that achieves clear preset patterns on the front of the zipper and colored fabric tape and teeth on the back, while maintaining the zipper's softness and durability.

[0005] To solve the above-mentioned technical problems, this utility model provides a double-sided colored zipper, including two fabric strips with teeth and a zipper head connected to the teeth. The teeth are located on the reverse side of the fabric strips. The front surface, the reverse surface of the fabric strips and the surface of the teeth are all provided with a colored layer. The colored layer on the front side of the fabric strips forms a preset pattern on the surface of the fabric strips. The color of the pattern is lighter than the color of the colored layer on the front side of the fabric strips.

[0006] Optionally, the coloring layer on the front side of the fabric tape is the same color as the coloring layer on the back side.

[0007] Optionally, the uncolored portion of the fabric tape forms a core layer, and a permeation layer is provided between the core layer and the colored layer.

[0008] Optionally, the thickness of the permeation layer, the coloring layer, and the core layer increases sequentially.

[0009] Optionally, the colored layer on the reverse side of the fabric tape covers both the uncovered portion and the covered portion of the teeth.

[0010] Optionally, the coloring layer of the fabric tape is formed by heat transfer printing, and the coloring layer on the front side of the fabric tape is provided with multiple patterns.

[0011] Optionally, the pattern is provided on one of the fabric strips; or, one pattern is provided on both fabric strips; or, both fabric strips are provided with the complete pattern.

[0012] Optionally, the monofilaments of the tooth are shaped by dyeing, and the coloring layer on the surface of the tooth covers the outer surface and the inner shielding surface of the tooth.

[0013] Optionally, the teeth and the fabric strip are sewn together by a suture, the surface of which is provided with a colored portion.

[0014] Optionally, the suture line is a line that matches the color of the tooth.

[0015] Compared to existing technologies, the advantages of this invention lie in the fact that the front of the fabric tape has a colored layer, which forms a preset pattern on the surface of the tape. The pattern can be selectively placed on all or part of the colored layer on the tape surface; the specific area and size can be determined according to actual needs. When the reverse side of the zipper is installed on the garment, the pattern faces outwards, becoming a mobile brand name card; it not only enhances the overall aesthetic and fashionable feel but also ensures the brand logo is always displayed, achieving silent yet efficient communication. Patterns include brand logos, artistic illustrations, text slogans, or functional symbols, meeting the differentiated visual needs of fashion and professional sports brands.

[0016] Both the reverse side of the fabric strip and the teeth are colored. The reverse surface of the fabric strip and the surface of the teeth are both covered with a colored layer. When the garment is opened or folded, the colored layers on the reverse side of the fabric strip and the surface of the teeth are revealed, forming an embedded decorative effect, bringing a better visual experience and completely solving the problem of the white showing on the reverse side of traditional printed zippers.

[0017] The double-sided colored zipper of this application ensures that the colored layers on both sides remain visible regardless of whether the zipper is closed or fully open, maintaining consistent color on both sides and coordinating with the main color scheme of the garment to enhance its aesthetics and style. At the same time, it guarantees everyday durability, with the fabric tape remaining soft on both sides without any stiffness, making it highly compatible with lightweight fabrics and improving the overall wearing comfort of the garment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1A schematic diagram of the structure of a first type of double-sided colored zipper provided in a specific embodiment of this utility model;

[0020] Figure 2 A schematic diagram of the structure of a second type of double-sided colored zipper provided in a specific embodiment of this utility model;

[0021] Figure 3 A schematic diagram of the structure of a third type of double-sided colored zipper provided in a specific embodiment of this utility model;

[0022] Figure 4 A schematic diagram of the structure of a fourth type of double-sided colored zipper provided in a specific embodiment of this utility model;

[0023] Figure 5 A schematic diagram of the structure of a fifth type of double-sided colored zipper provided in a specific embodiment of this utility model;

[0024] Figure 6 This is a side view of the fabric tape.

[0025] Figure label:

[0026] 1-Fabric tape; 2-Tooths; 3-Sewing thread; 4-Coloring layer; 5-Permeable layer; 6-Pattern; 7-Coloring part; 8-Tooths covering part. Detailed Implementation

[0027] The core of this utility model is to provide a double-sided colored zipper, which achieves a clear preset pattern on the front of the zipper and colored fabric tape and teeth on the back, while maintaining the zipper's softness and durability.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please refer to Figures 1 to 5 This is a schematic diagram of the structure of the double-sided colored zipper provided by this utility model.

[0030] In one specific embodiment of this utility model, it includes two fabric strips 1 with teeth 2 and a pull head connected to the teeth 2. The teeth 2 are set on the reverse side of the fabric strips 1. The front surface, the reverse surface and the surface of the teeth 2 of the fabric strips 1 are all provided with a coloring layer 4. The coloring layer 4 on the front side of the fabric strips 1 forms a preset pattern 6 on the surface of the fabric strips 1. The color of the pattern 6 is lighter than the color of the coloring layer 4 on the front side of the fabric strips 1.

[0031] It should be noted that the double-sided colored zipper includes two fabric strips 1 and a zipper pull. Each fabric strip 1 has teeth 2 continuously arranged along one edge. The teeth 2 mesh with each other to form a stack of fabric strips 1 that can be opened and closed. The shape and size of the teeth 2 need to ensure that the zipper can open and close smoothly, while providing sufficient tension and stability. The zipper pull is connected to the teeth 2 and serves as the moving part of the zipper, used to control the engagement and disengagement of the teeth 2. By pulling the zipper pull, the teeth 2 can be opened or closed, realizing the opening and closing function of the zipper.

[0032] The teeth 2 are located on the reverse side of the fabric tape 1. After sewing, the right side of the fabric tape 1 faces the outside of the garment, and the reverse side of the fabric tape 1 is close to the inner layer of the garment. The zipper pull is also hidden on the reverse side. The double-sided colored zipper is completely hidden on the reverse side of the fabric. When viewed from the front of the garment, the zipper body completely disappears, leaving only clean and neat opening lines, resulting in an extremely simple appearance.

[0033] The front of the fabric tape 1 has a coloring layer 4, which forms a preset pattern 6 on the surface of the fabric tape 1. The pattern 6 can be set on all or part of the coloring layer 4 on the surface of the fabric tape 1, and the specific area and size can be determined according to the actual situation. When the reverse side of the zipper is installed on the garment, the pattern 6 faces the outside view, becoming a mobile brand name card; it not only enhances the overall aesthetic level and fashion sense, but also allows the brand logo to be displayed at all times, achieving silent and efficient communication. The pattern 6 can include brand logos, artistic illustrations, text slogans, or functional symbols, meeting the differentiated visual needs of fashion and professional sports brands.

[0034] Both the reverse side of the fabric tape 1 and the teeth 2 are colored. The reverse surface of the fabric tape 1 and the surface of the teeth 2 are provided with a colored layer 4. When the garment is opened or folded, the colored layer 4 on the reverse side of the fabric tape 1 and the colored layer 4 on the surface of the teeth 2 are revealed, forming an embedded decorative effect, bringing a better visual experience and completely solving the problem of the white showing on the reverse side of traditional printed zippers.

[0035] The double-sided colored zipper of this application ensures that the colored layers 4 on both sides remain visible regardless of whether the zipper is closed or fully open, maintaining consistent color on both sides and coordinating with the main color scheme of the garment to enhance its aesthetics and style. Simultaneously, it guarantees everyday durability, with the fabric tape 1 remaining soft on both sides without stiffness, making it highly compatible with lightweight fabrics and improving the overall wearing comfort of the garment.

[0036] In some embodiments, the coloring layer 4 of the fabric tape 1 is formed by heat transfer printing. After high-temperature sublimation, the color penetrates into the fiber surface of the fabric tape 1 (heat transfer printing). First, a high-resolution pattern 6 is designed. The pattern 6 is printed on heat transfer paper. The pattern 6 can be printed onto the surface of the fabric tape 1 using a hot stamping machine or other machinery. The operation is simple, and the pattern 6 is formed in one step without the need for color matching.

[0037] This heat transfer coloring method is a mature technology in the existing field, with high coverage, strong adhesion, clear edges of pattern 6, no cracks or fading, and a high decorative effect; it also meets green and environmentally friendly printing standards, with no environmental pollution; because the heat transfer layer is mechanically interlocked with the fiber, its abrasion resistance is superior to traditional screen printing. Preferably, the substrate of the fabric tape 1 is a white polyester high-density plain weave tape that can withstand 200℃ hot pressure, and is dimensionally stable and does not yellow.

[0038] Pattern 6 can be left uncolored, matching the color of the color layer 4 on the front of the fabric tape 1. In this case, the heat transfer dye will not be used for a cutout design on pattern 6. Alternatively, pattern 6 can be a different color from the color layer 4 on the front of the fabric tape 1, but there must be a certain contrast between the colors of pattern 6 and the color layer 4 on the front of the fabric tape 1. Pattern 6 should be darker than the original color of the fabric tape 1, and the part of the color layer 4 on the front of the fabric tape 1 that does not cover the pattern should be darker than the color of pattern 6.

[0039] The front side of fabric tape 1 is first dyed entirely in a light or bright color of pattern 6, then covered with a layer of dark heat transfer dye, and the area of ​​pattern 6 is cut out to allow the light-colored background to naturally show through, creating a strong contrast where the dark background embraces the light-colored pattern 6. This ensures that the fabric tape 1 has a rich color after dyeing, high adhesion, and high stability. The reverse side of fabric tape 1 is simultaneously transferred with the same dark color or a preset color to the zipper pull, with no cutouts on the entire side to prevent white areas from showing.

[0040] Example 1: The base material of the fabric tape 1 and the pattern 6 are both white. The finished product needs to have a black appearance. Simply transfer black on the front and back sides and the entire zipper pull, and cut out the pattern 6 area.

[0041] Example 2: If the base material of fabric tape 1 is white, pattern 6 is red, and the finished product needs to have a black appearance, first dye the entire fabric tape 1 red, then transfer black and cut out the area of ​​pattern 6. After the zipper is installed, the entire tape is located on the reverse side of the fabric, with the zipper pull inside; the dark background and light pattern 6 on the front face outwards for a more visually striking effect.

[0042] The fabric tape 1, colored using the heat transfer method, shows only a slight increase in thickness. Both the dark background area and the light-colored pattern 6 are located on the surface of tape 1 with no difference in thickness, resulting in a relatively smooth surface and smooth zipper operation. The dark background highlights the light-colored pattern 6, making the brand highly recognizable. The reverse side color is controllable, completely overcoming the limitation of traditional heat transfer printing which can only leave white space, and coordinating with the color scheme of the garment's lining. It is soft to the touch, wear-resistant, and washable, fully meeting the needs of high-frequency use in sports and outdoor activities.

[0043] In some embodiments, the coloring layer 4 on the front side of the fabric tape 1 is the same color as the coloring layer 4 on the back side. Preferably, the same formula of color paste or dye solution is applied to both sides of the fabric tape 1 at one time to ensure that the hue, color depth, and color are completely consistent on both sides. The same color on both sides eliminates the defects of traditional fabric tape 1 where the reverse side is exposed or the reverse side is of different color, so that the zipper always maintains a unified visual appearance when turned over, sewn, or exposed, thus improving the grade of the zipper.

[0044] Of course, the coloring layer 4 on the front and back of the fabric tape 1 can also be set to different colors, that is, the coloring layer 4 on the front of the fabric tape 1 and the coloring layer 4 on the back are different colors.

[0045] For example, for garments with different colors on both sides, the color of the dyeing layer 4 on the front of the fabric strip 1 matches the color of the exposed side of the garment, while the color of the dyeing layer 4 on the back matches the color of the lining. The overall structure maintains a five-layer gradient: outer dyeing layer, thin penetrating layer, white core layer, thin penetrating layer, and inner dyeing layer. The thickness ratio follows the ratio of dyeing layer 4: single-sided penetrating layer 5 = 3~5:1, and dyeing layer 4: core layer = 1:3~5. For instance, the highly saturated outer dyeing layer 4 on the front is precisely dyed on the surface through heat transfer, allowing it to match the main color of the outer garment in any color scheme. The low-brightness or contrasting inner color on the back is also independently dyed, ensuring seamless integration with the colors of the lining, pocket fabric, or inner mesh fabric. The penetrating layer 5 is relatively thin, acting as a buffer zone for the downward diffusion of dye from the dyeing layer 4 and preventing the front and back dyeing layers 4 from interpenetrating and mixing colors. The core layer remains natural polyester, providing both longitudinal tensile strength and lateral stiffness, while retaining a soft hand feel due to its undyed nature. When worn as a garment, the front of the zipper blends seamlessly with the main color of the coat, while the back matches the lining color, creating a visually appealing contrast without any exposed white areas, thus enhancing the overall sense of sophistication.

[0046] In another embodiment, the front of the fabric strip 1 displays the logo in a highly saturated brand color, which has excellent visibility under outdoor light; the back is kept in a low-key dark color such as dark gray, which is dirt-resistant and non-reflective, and is more understated when worn close to the body, meeting the needs of differentiation.

[0047] In some embodiments, during heat transfer printing on both sides of the fabric tape 1, the high temperature causes the paste to melt instantly and penetrate downwards, thus naturally forming an extremely thin penetration layer 5 between the outermost colored layer 4 and the middle uncolored core layer. The uncolored high-density polyester plain weave tape serves as the white core layer in the center, making the entire tape exhibit a mirror-symmetrical structure of colored layer 4, penetration layer 5, core layer, penetration layer 5, and colored layer 4.

[0048] The core layer retains its original properties, making the overall tape more rigid and less prone to curling, providing mechanical strength and dimensional stability for the zipper. The penetrating layer 5 bonds firmly with the disperse dye, improving wash and rub fastness, while its flexible chain segments buffer the shear force of the zipper pull on the surface, reducing the risk of color fading. The coloring layer 4 uses heat transfer dye to fix the color on the surface of the penetrating layer 5, ensuring rich surface color. Preferably, after transfer, the tape 1 immediately enters an oven for secondary setting, allowing a small amount of dark dye to penetrate inward, increasing the color saturation of the tape 1, ensuring sharp and clear edges for the pattern 6, and ensuring saturated colors on both sides with consistent background colors and no white gaps in the background.

[0049] In some embodiments, the dye in the coloring layer 4 penetrates downwards during thermal sublimation to form a penetration layer 5. If sublimation is insufficient, the penetration of the coloring layer 4 is relatively shallow; for example, the dye may only remain within 1µm, causing the white base of the core layer to easily show through, resulting in a transparent base and an incorrect, floating color. If sublimation is excessive, the penetration of the coloring layer 4 is relatively thick, with the dye penetrating deep into the middle of the core layer or even penetrating it. This increases the amount of free dye on the surface, and excess dye cannot be fully adsorbed by the fiber, forming floating dye that is prone to migration. Therefore, the penetration layer 5, the coloring layer 4, and the core layer are arranged in ascending order of thickness. Preferably, as shown in the figure... Figure 6 As shown, the ratio of surface coloring layer 4 to single-sided penetration layer 5 is controlled at 3-5:1, and the ratio of coloring layer 4 to core layer is 1:3-5. The thickness of penetration layer 5 is only 1 / 3 to 1 / 5 of that of coloring layer 4, acting as a buffer zone for the downward diffusion of dye from coloring layer 4, ensuring moderate dye diffusion and color saturation while preventing it from penetrating deep into the core layer. The core layer thickness is 3-5 times that of coloring layer 4, ensuring sufficient core layer thickness to provide adequate mechanical strength and avoid overall stiffness.

[0050] In some embodiments, the colored layer 4 on the reverse side of the fabric tape 1 covers the portion of the uncovered tooth 2 and the tooth-covering portion 8.

[0051] It should be noted that the coloring layer 4 on the reverse side of the fabric tape 1 adopts a partitioned coverage design. The areas at both ends of the teeth 2 that are not covered by the teeth 2 are completely and continuously covered by the coloring layer 4, presenting a dark background or a preset color consistent with the front side.

[0052] The tooth-obstructing portion 8 directly below tooth 2 has two possible solutions due to structural obstacles:

[0053] If tooth 2 is not yet assembled, dye can be heat-transfer printed onto the entire reverse side of fabric tape 1 before sewing or ultrasonically fixing tooth 2 to it. The monofilament of tooth 2 is dyed throughout. In this way, the color of the uncovered areas at both ends matches the reverse side of the fabric, and the tooth-covered parts 8 are also covered with dye of the preset color, resulting in higher overall saturation and a stronger sense of fashion for the zipper.

[0054] If the teeth 2 are pre-connected to the fabric tape 1, the teeth-covered area 8 will naturally remain white during reverse transfer. Since the color of the teeth 2 is the same as the color of the fabric tape 1, the white area is completely covered by the solid teeth 2, and the reverse side of the garment remains a uniform color with no exposed white or contrasting colors. The color of the uncovered areas at both ends matches the reverse side of the fabric, achieving a truly white-free effect.

[0055] Both of the above solutions take into account both appearance integrity and technological feasibility, and meet the needs of different production cycles.

[0056] In some embodiments, the coloring layer 4 on the front side of the fabric tape 1 can be set with one pattern 6, at least two identical patterns 6, or at least two irregularly shaped patterns 6. For example, at least two different two-dimensional contour patterns 6, such as circles, stars, arrows, brand letters, QR code blocks, etc., are discretely distributed on the front side of the fabric tape 1 to form a multi-irregular array. The patterns 6 on the front side of the fabric tape 1 can be formed by thermal transfer printing. Specifically, on the full-coverage disperse dye layer on the film surface, the hollow areas corresponding to all patterns 6 are pre-etched. The dye is retained in the non-hollow areas, and the dye in the non-hollow areas sublimates and condenses into the coloring layer 4, which bonds with the polar groups on the front side of the fabric tape 1, resulting in high color fastness. There is no dye in the hollow areas, and the front side of the fabric tape 1 retains the blank color or only has a very light background color, naturally revealing the negative pattern 6. After cold peeling, one film completes the synchronous transfer of the coloring layer 4 and all patterns 6, without the need for secondary overprinting or laser re-engraving.

[0057] As can be seen from the above, the single pattern, repeating pattern or multiple irregular array can be quickly switched on the front side of the fabric belt 1. It has high production efficiency, low energy consumption, small color difference, full color, and small height difference between the pattern area and the non-pattern area, ensuring that the pull head slides smoothly.

[0058] In some embodiments, on the front side of the fabric tape 1 of the same double-sided colored zipper, pattern 6 can be arranged in three different ways:

[0059] Pattern 6 is placed on one of the fabric strips 1. In other words, a single-sided pattern 6 is adopted, with the complete pattern 6 only set on the front colored layer 4 of the left or right fabric strip 1, while the other fabric strip 1 remains solid color. When pulled together, pattern 6 is always located on one side, resulting in a visually clean appearance.

[0060] Alternatively, a pattern 6 can be placed on both fabric strips 1 simultaneously, that is, a single pattern 6 can be set across the strips. A continuous pattern 6 spans the two fabric strips 1 on the left and right. When the zipper is closed, the two parts of the pattern 6 on the left and right sides are precisely aligned to form a single complete logo or graphic, enhancing the interactive experience.

[0061] It should be noted that for zippers with an installed zipper pull, the pattern 6 can be printed entirely on the unfolded continuous fabric tape 1. A photoelectric positioning system is then used to precisely divide the fabric tape 1 into two strips, left and right, ensuring that the center line of the teeth 2 coincides with the dividing line of pattern 6. Subsequent tooth installation and zipper pull threading processes use a tooth pitch compensation algorithm to eliminate accumulated errors, minimizing misalignment of pattern 6 upon closure. For zippers without an installed zipper pull, pattern 6 is printed entirely on the front side of fabric tape 1 after the zipper is closed. This method is simple and reduces the likelihood of pattern 6 misalignment.

[0062] Alternatively, both fabric strips 1 can have complete patterns 6, i.e., independent patterns 6 on both sides. Each of the left and right fabric strips 1 has its own complete pattern 6, creating a symmetrical, mirrored, or independent double pattern 6 effect when the zipper is closed, thus creating a dual brand logo or artistic effect. It should be noted that the independent patterns 6 on both sides can be printed independently on the left and right fabric strips 1, and the patterns 6 can be the same or different. If symmetry of the patterns 6 is desired, mirror layout can be used to output the patterns 6 of the left and right fabric strips 1 symmetrically, ensuring visual consistency.

[0063] As shown above, brands can choose from single-sided brand lettering, a large logo on the crossbody, or symmetrical badges on both sides, depending on the clothing style, to meet diverse visual needs. By adjusting the arrangement of pattern 6, multiple appearances can be derived from the same zipper, enhancing product added value and shelf recognition.

[0064] In some embodiments, the teeth 2 are injection molded or die-cast at equal intervals along the inner edge of the fabric strip 1. The coloring layer 4 on the surface of the teeth 2 can be a secondary coating formed by spraying paint after traditional injection molding, or it can be colored by heat transfer printing. However, since the teeth 2 are solids, the color penetration is not strong, and the penetration layer 5 is not very obvious. That is, the stability of the coloring of the surface layer of the teeth 2 and the surface layer of the suture line 3 by heat transfer printing is not very good.

[0065] To ensure the quality of the coloring layer 4 on the surface of the tooth 2, the monofilaments of the tooth 2 are dyed and formed. Specifically, using polyoxymethylene or copolyester monofilaments as the matrix, high-concentration nano-sized pigment masterbatch is incorporated during the extrusion stage, so that the pigment is evenly distributed throughout the entire monofilament. After heat setting, because the pigment has been evenly distributed within the matrix during the monofilament extrusion stage, the outer surface and the inner shielding surface are naturally the same color, resulting in a uniform color throughout the entire tooth 2. The color is firm, with no traces of secondary spraying, and no need for additional painting or pad printing, simplifying the process and achieving a more complete color.

[0066] The coloring layer 4 on the surface of the tooth 2 completely covers the outer surface and the inner covering surface of the tooth 2. The outer surface includes the outer arc surface and the top surface that are still visible after engagement. The inner covering surface covers the inner arc surface and the root of adjacent teeth 2 that overlap each other, as well as the bottom surface of the tooth 2 that is covered by the fabric strip 1 after it is fixed to the fabric strip 1. For zippers installed on the reverse side of the fabric, when the garment is opened or folded, the coloring layer 4 on the reverse side of the fabric strip 1 and the coloring layer 4 on the surface of the tooth 2 are visible, while the inner covering surface is surrounded by the fabric strip 1 and the zipper pull.

[0067] Because the teeth 2 are uniformly colored throughout, there is no color difference from any viewing angle. The coloring layer 4 on the surface of the teeth 2 is exposed together with the coloring layer 4 on the reverse side of the fabric tape 1, resulting in a unified color. Even if the inner covering surface is obscured by the zipper pull or adjacent teeth, the pigment is deeply embedded in the substrate and remains completely consistent with the outer surface. Thus, when the zipper is opened, the teeth 2 form a continuous color band that extends seamlessly along the entire length, with no white gaps between the teeth. The visual effect is complete and exquisite, completely solving the problem of white showing at the root of the teeth 2 or the inability to color the inner covering surface due to heat transfer. The uniform coloring embeds the pigment in the monofilament, and the outer surface and the inner covering surface wear down synchronously, with only a slight decrease in gloss. There is no white showing or paint peeling, completely solving the problem of paint peeling from the gaps between the teeth 2.

[0068] In some embodiments, the teeth 2 and the fabric tape 1 are sewn together by a stitch 3. The stitch 3 is made of high-strength continuous polyester filament, and its surface is provided with a colored portion 7. For zippers where the teeth 2 and the fabric tape 1 are already connected, during the heat transfer process of the teeth 2, the surface of the stitch 3 exposed on the surface of the teeth 2 can be colored to form the colored portion 7, and the colored portion 7 is consistent with the colored layer 4 on the surface of the teeth 2. When the garment is opened or folded, the colored layer 4 on the reverse side of the fabric tape 1, the colored layer 4 on the surface of the teeth 2, and the colored portion 7 of the stitch 3 are revealed, resulting in an overall colored appearance with no color clashes or exposed white areas, thus meeting the requirements for coloring on both sides.

[0069] In some embodiments, the stitching thread 3 is a thread that matches the color of the teeth 2, meaning the stitching thread 3 uses a thread that is completely the same color as the teeth 2. The stitching thread 3 is produced using a pre-dyeing and post-spinning process, where disperse dye is injected into the polyester melt before spinning. The entire stitching thread 3 is colored, with the outer surface fully covered; that is, the colored part 7 covers all the outer surfaces of the stitching thread 3. Because the dye is locked inside the fiber, even if there is localized pilling, there will be no white showing or bleeding. The color remains the same as the reverse side of the fabric tape 1 and the color of the teeth 2, presenting a continuous color chain on the reverse side without any stitching divisions. The entire reverse side of the zipper has zero white lines, ensuring visual unity and enhancing the sense of luxury.

[0070] Preferably, the dyeing formula of the suture 3 is the same as that of the tooth 2 to ensure that the hue, saturation and gloss are completely consistent; the same color number and the same extrusion batch are used for both the tooth 2 monofilament and the suture 3 to reduce color difference.

[0071] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-sided colored zipper comprising two cloth tapes (1) having teeth (2) and a slider connected to the teeth (2), the teeth (2) being provided on the reverse side of the cloth tapes (1), characterized in that, The front surface, back surface and tooth (2) of the cloth tape (1) are all provided with a coloring layer (4). The coloring layer (4) on the front surface of the cloth tape (1) forms a preset pattern (6) on the surface of the cloth tape (1). The color of the pattern (6) is lighter than the color of the coloring layer (4) on the front surface of the cloth tape (1).

2. The double-sided colored zipper according to claim 1, wherein, The coloring layer (4) on the front side of the fabric strip (1) is the same color as the coloring layer (4) on the back side.

3. The double-sided colored zipper according to claim 2, wherein, The uncolored portion of the fabric tape (1) forms the core layer, and a permeation layer (5) is provided between the core layer and the colored layer (4).

4. The double-sided colored zipper according to claim 3, wherein, The thicknesses of the permeation layer (5), the coloring layer (4), and the core layer increase sequentially.

5. The double-sided colored zipper according to claim 2, wherein, The colored layer (4) on the reverse side of the cloth strip (1) covers the part of the uncovered tooth (2) and the tooth-covering part (8).

6. The double-sided colored zipper according to claim 1, wherein, The coloring layer (4) of the fabric tape (1) is formed by heat transfer printing, and the coloring layer (4) on the front side of the fabric tape (1) is provided with multiple patterns (6).

7. The double-sided colored zipper according to claim 1, wherein, The pattern (6) is provided on one of the fabric strips (1); or, one pattern (6) is provided on two fabric strips (1); or, both fabric strips (1) are provided with the complete pattern (6).

8. The double-sided colored zipper according to claim 1, wherein, The monofilaments of the tooth (2) are shaped by dyeing, and the coloring layer (4) on the surface of the tooth (2) covers the outer surface and inner shielding surface of the tooth (2).

9. The double-sided colored zipper according to claim 8, wherein, The teeth (2) and the cloth strip (1) are sewn together by a suture (3), and the surface of the suture (3) is provided with a colored part (7).

10. The double-sided colored zipper according to claim 9, wherein, The suture line (3) is a line that matches the color of the tooth (2).

Images