Flexible bag having zipper teeth, textile article having directly mounted plastic zipper teeth, and textile article provided with plastic zipper teeth

Abstract

The present application discloses a flexible bag having zipper teeth, a textile article having directly mounted plastic zipper teeth, and a textile article provided with plastic zipper teeth. The flexible bag having zipper teeth comprises a fabric, a core cord, a sewing thread, and a plurality of zipper teeth; the fabric comprises a fabric body, a folded edge and a connecting portion, the folded edge is attached to an edge region of the fabric body, and the connecting portion is connected between an edge end of the fabric body and an edge end of the folded edge; the connecting portion is provided with a cord channel, and the core cord passes through the cord channel; the sewing thread is stitched to the fabric and locks the connecting portion, so as to tightly wrap the core cord by means of the connecting portion; the plurality of zipper teeth are arranged in the extension direction of the core cord, and each zipper tooth is connected to the region of the fabric where the connecting portion is located.

Description

Flexible bags with chain teeth, textile products with directly mounted plastic chain teeth, and textile products fitted with plastic chain teeth.

[0001] Cross-references

[0002] This application claims priority to the following Chinese patent applications filed on May 27, 2025, with application number 202510700600.7, entitled "Flexible Bag with Chain Teeth"; filed on May 27, 2025, with application number 202521067954.4, entitled "Flexible Bag with Chain Teeth"; filed on August 25, 2024, with application number 202422061033.9, entitled "Textile Article with Directly Installed Plastic Chain Teeth"; and filed on August 25, 2024, with application number 202422061032.4, entitled "Textile Article with Plastic Chain Teeth," the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the technical field of chain teeth, bags, etc., and specifically relates to a flexible bag with chain teeth, a textile product with plastic chain teeth directly installed, and a textile product with plastic chain teeth. Background Technology

[0004] Some flexible bags in related technologies have their individual zippers sewn directly to the edge of the bag's opening. However, this process requires manufacturing the zipper separately—that is, attaching the zipper teeth to the zipper belt to form the zipper, and then sewing the entire zipper to the edge of the bag's opening. This method inherently increases production steps, extends the production cycle, reduces production efficiency, and further, the need to separately configure the zipper belt during zipper production increases material utilization and raises costs.

[0005] To address the aforementioned issues, some flexible bags install the zipper teeth separately at the edge of the bag's opening. Specifically, the core thread is first tied to the surface of the fabric at the bag's opening, and then the zipper teeth are sewn into the area where the core thread is located. However, in this method, the core thread is prone to loosening on the fabric surface, leading to insecure zipper teeth and affecting the proper opening and closing of the zipper pull. Summary of the Invention

[0006] This application provides a flexible bag with chain teeth, comprising: fabric, core thread, sewing thread, and multiple chain teeth; the fabric includes a fabric body, a hem, and a connecting portion, the hem being fitted to the edge area of ​​the fabric body, and the connecting portion being connected between the edge end of the fabric body and the edge end of the hem; the connecting portion has a thread channel, and the core thread passes through the thread channel; the sewing thread is sewn onto the fabric and locks the connecting portion to tightly wrap the core thread through the connecting portion; multiple chain teeth are arranged along the extension direction of the core thread, and each chain tooth is connected to the area where the connecting portion of the fabric is located.

[0007] This application provides a fabric article for directly mounting plastic chain teeth. The fabric article includes a mounting part for mounting plastic chain teeth and a plurality of plastic chain teeth mounted on the mounting part in a gap manner. The feature is that a core thread and a sewing thread are arranged on the mounting part, the sewing thread is inserted through the mounting part, the core thread is positioned on the mounting part through the sewing thread, and the plastic chain teeth are installed on the mounting part by injection molding and simultaneously bite the core thread and the sewing thread.

[0008] The textile products mentioned include, but are not limited to, common textile products such as clothing, bags, shoes, hats, bed sheets, duvet covers, and chair covers.

[0009] The mounting portion is a part of the fabric used to make the textile product. This portion is generally located at the edge of the fabric or at the edge of a partial opening in the fabric. The mounting portion can be directly placed in an injection molding machine to injection mold plastic teeth; that is, the width of the mounting portion is equal to or slightly larger than the width of the plastic teeth covering the plastic on the fabric. The mounting portion can be a single layer or a double layer of fabric. Generally, to reduce the unraveling of threads at the edges after the fabric is cut, the edges of the textile product can be finished by laser cutting and heat melting, or by using stitching to seal the edges.

[0010] The specific structure of the installation part is flexible and varied. The following describes several specific implementation methods.

[0011] In the first embodiment, the mounting portion is a single layer of fabric, with at least a portion of the stitching passing through the core thread, and the stitching binding the core thread. The stitching not only passes through the mounting portion but also through the core thread, thus firmly bonding the core thread to the fabric layer, reducing core thread displacement, and further improving the connection stability between the plastic chain teeth and the mounting portion.

[0012] Based on this embodiment, in order to further increase the connection stability between the plastic chain teeth and the mounting part, injection pre-drilled holes are formed in the mounting part by drilling. The plastic chain teeth are installed in the mounting part by injection molding and cover the injection pre-drilled holes from top to bottom. Moreover, the plastic during injection molding passes through the injection pre-drilled holes to form connecting posts connecting the plastic chain teeth located on the upper and lower sides of the mounting part.

[0013] The second embodiment utilizes a concealed double-layer fabric structure formed by stacking two single-layer fabrics. The double-layer fabric includes an upper base fabric and a lower base fabric. The edges of the upper and lower base fabrics are aligned vertically to form the mounting area. A stitch passes through both the upper and lower base fabrics. The core thread is positioned on the outer edge of the lower base fabric, with a portion of the stitch passing through and binding the core thread. The double-layer fabric is formed by overlapping two independent single-layer fabrics with their edges aligned. Further, the two fabrics can be joined together using stitches or an adhesive layer to reduce relative movement between them. The lower base fabric has two sides: an inner side facing the upper base fabric and an outer side facing it. In this embodiment, the core thread is positioned on the outer edge of the lower base fabric.

[0014] The third embodiment is a hidden double-layer fabric structure formed by folding a single layer of fabric inward. The double-layer fabric includes an upper base fabric and a lower base fabric. The folded edges of the upper and lower base fabrics are the mounting parts. The sewing thread passes through the upper and lower base fabrics. The core thread is arranged on the outer edge of the lower base fabric. Part of the sewing thread passes through the core thread, and part of the sewing thread is tied to the core thread.

[0015] The fourth embodiment utilizes a concealed double-layer fabric structure formed by folding a single layer of fabric inward. The double-layer fabric includes an upper base fabric and a lower base fabric. The folded edges of the upper and lower base fabrics are the mounting portions. The stitching passes through the upper and lower base fabrics. The core thread is positioned at the folded edges of the double-layer fabric and is wrapped within it. Part of the stitching is arranged along the side of the core thread. The function of the stitching is to restrict the displacement of the core thread from the side while sewing the upper and lower base fabrics together. This effectively reduces core thread displacement, thereby improving the adhesion stability of the plastic chain teeth.

[0016] Building upon the fourth embodiment, further, a portion of the stitching simultaneously passes through the upper base fabric, the core thread, and the lower base fabric. Alternatively, a portion of the stitching binds the upper base fabric, core thread, and lower base fabric from the outside. This better secures the position of the core thread, making it less likely to detach from the double-layered fabric, further improving the adhesion stability of the plastic chain teeth.

[0017] A further technical solution may include an intermediate adhesive layer disposed within the double-layer fabric, which is used to bond the upper base fabric and the lower base fabric together. Wherein, when the core wire is wrapped by the double-layer fabric, the intermediate adhesive layer can simultaneously bond the upper base fabric, the lower base fabric, and the core wire, which further defines the position of the core wire.

[0018] A further technical solution could be that a waterproof membrane layer is provided on the outer surface of the fabric layer at the installation location, and part of the waterproof membrane layer is covered by the plastic chain teeth.

[0019] This application provides a fabric article equipped with plastic chain teeth. The fabric article includes a concealed double-layer structure formed by folding the fabric layers inward. The double-layer structure includes an upper base fabric and a lower base fabric. The folded edge area of ​​the double-layer structure is used to install a plurality of spaced plastic chain teeth. The feature is that it further includes a heat-adhesive film, which not only adheres to the inner edge area of ​​the lower base fabric but also to the upper base fabric, thereby achieving edge finishing at the junction of the upper and lower base fabrics. Injection molding pre-drilled holes are formed in the folded edge area of ​​the double-layer structure by punching holes. The plastic chain teeth are installed in the folded edge area of ​​the double-layer structure by injection molding, covering the injection molding pre-drilled holes from both top and bottom. Furthermore, the plastic during injection molding passes through the injection molding pre-drilled holes to form connecting posts connecting the plastic chain teeth located on the upper and lower sides of the double-layer structure.

[0020] The textile products mentioned include, but are not limited to, common textile products such as clothing, bags, shoes, hats, bed sheets, duvet covers, and chair covers.

[0021] The folded edge region refers to the area near the folded edge of the fabric used to make the textile. This region can be located at the edge of the fabric or at the edge of a partial opening in the fabric. The folded edge region of the fabric can be directly placed in an injection molding machine to injection mold plastic chain teeth. Generally, to reduce the unraveling of the threads at the edge after the fabric is cut, the fabric of the textile is usually trimmed by laser cutting, and then the inner edge region of the lower base fabric is bonded to the upper base fabric using a heat-bonding film.

[0022] The double-layer structure is formed by folding the edges of the fabric layers in the folded edge area, creating two layers. The lower base fabric is an inwardly folded layer, and generally, the width of the lower base fabric is greater than the width of the plastic chain teeth covering the lower base fabric.

[0023] The injection molding pre-set hole is a through hole formed by laser, hot stamping or mechanical stamping. The through hole penetrates the fabric layer. If a laser or hot stamping method is used to drill a hole in the double fabric layer, the edge of the hole is locally burned by high temperature, and the cut of the fabric is sintered and does not easily fall apart. In addition, cutting the double fabric layer under a compressed state can also make the edge of the injection molding pre-set hole weld together, so that the plastic can pass smoothly through the injection molding pre-set hole during injection molding.

[0024] A further technical solution may include a suture thread arranged along the folded edge region of the double-layer structure. The suture thread can pass through the upper and lower base fabrics of the double-layer structure to sew the two fabric layers together. The suture thread is arranged on the side of the injection molding pre-drilled hole, and part of the suture thread is covered by the plastic chain teeth. The stitching method of the suture thread is relatively flexible. Two common stitching methods are as follows: the first is a flat stitch, where the suture thread is arranged parallel to the folded edge of the double-layer structure, and the suture thread can be a single line or multiple lines arranged side by side; the second is a lockstitch, where the suture thread is arranged in a crisscross pattern and wraps around a portion of the fabric near the folded edge of the double-layer structure, thus forming a lockstitch structure. By setting the suture thread, a concave-convex structure can be formed on the fabric, which helps to improve the adhesion of the plastic chain teeth. The suture thread is arranged on the side of the injection molding pre-drilled hole, but it is not limited to being arranged specifically inside or outside the injection molding pre-drilled hole, so that the suture thread does not obstruct the injection molding pre-drilled hole. However, by installing the plastic chain teeth after arranging the sutures, the bonding force between the plastic chain teeth and the folded edge area can be improved by means of the sutures, thereby improving the connection stability of the plastic chain teeth.

[0025] A further technical solution may also include a core wire, which is arranged at the folded edge region of the double-layer structure and held between the upper and lower base fabrics of the double-layer structure. At least one stitch extending along the length of the core wire is arranged on the inner side region of the core wire, and the stitch connects the upper and lower base fabrics. Part of the stitch and the core wire are covered by the plastic chain teeth. The inner side region of the core wire refers to the area located next to the core wire and away from the folded edge; viewed from the front, this area is elongated and extends along the length of the core wire. Since the injection-molded pre-drilled hole can be arranged on the inner or outer side of the stitch, there are two possibilities: first, the injection-molded pre-drilled hole only passes through the upper and lower base fabrics; second, the injection-molded pre-drilled hole is arranged close to the core wire, so that in addition to passing through the upper and lower base fabrics, the injection-molded pre-drilled hole also partially passes through but does not break the core wire. In this way, the suture not only connects the upper and lower base fabrics but also restricts the displacement of the core on the inside, which helps to improve the adhesion stability of the plastic chain teeth.

[0026] A further technical solution may include a core wire, which is arranged at the folded edge region of the double-layer structure and held between the upper and lower base fabrics. A stitching thread is positioned at the core wire's location, positioned outside the upper and lower base fabrics and able to pass through them from the inner side region of the core wire, thereby externally binding the core wire, upper base fabric, and lower base fabric. Part of the stitching thread and core wire are covered by the plastic chain teeth. Binding the core wire with the stitching thread better defines its position, preventing it from easily detaching from the double-layer structure and further improving the adhesion stability of the plastic chain teeth.

[0027] A further technical solution could be that a waterproof membrane layer is provided on the outer surface of the double-layer structure, the injection molding pre-set hole passes through the waterproof membrane layer, the stitching does not pass through the waterproof membrane layer, and part of the waterproof membrane layer is covered by the plastic chain teeth.

[0028] A further technical solution may include an intermediate adhesive layer disposed within the double-layer structure, which comprises an upper base fabric and a lower base fabric. The intermediate adhesive layer is used to bond the upper and lower base fabrics together. The injection-molded pre-drilled hole formed by the punching penetrates the upper base fabric, the lower base fabric, and the intermediate adhesive layer. By providing the intermediate adhesive layer, the upper and lower base fabrics can be well bonded together without misalignment during punching, improving the stability of the processing position of the injection-molded pre-drilled hole. Furthermore, adding the intermediate adhesive layer in the middle of the double-layer structure can appropriately increase the rigidity of the double-layer structure, which is beneficial for ensuring smooth engagement of the chain teeth.

[0029] A further technical solution may include a core wire, which is arranged in the folded edge area of ​​the double-layer structure and held between the upper and lower base fabrics. The intermediate adhesive layer can simultaneously bond the upper base fabric, the lower base fabric, and the core wire. Further, it may include a stitching thread, which is arranged along the extension direction of the core wire. The stitching thread can pass through the upper and lower base fabrics of the double-layer structure to sew the two fabric layers together. The stitching thread is arranged on the side of the injection molding pre-set hole, and part of the stitching thread is covered by the plastic chain teeth. The intermediate adhesive layer can simultaneously bond the upper base fabric, the lower base fabric, the core wire, and the stitching thread. Further, a waterproof membrane layer is also provided on the outer surface of the double-layer structure, and part of the waterproof membrane layer is covered by the plastic chain teeth. The core wire can locally increase the protrusion height of the folded edge area to improve the adhesion of the plastic chain teeth. Attached Figure Description

[0030] Figure 1 is a schematic diagram of the structure of the fabric and core thread disclosed in the embodiment of this application;

[0031] Figure 2 is a partial schematic diagram of the single-layer fabric, core thread, stitching thread, and chain teeth disclosed in the embodiments of this application;

[0032] Figure 3 is a cross-sectional view of the area where the folded edge and the fabric body of the first type of single-layer fabric disclosed in the embodiments of this application are attached;

[0033] Figure 4 is a cross-sectional view of the area where the folded edge and the fabric body are attached in the case of a single-layer fabric disclosed in the embodiments of this application.

[0034] Figure 5 is a cross-sectional view of the area where the folded edge and the fabric body are attached in the case of a single-layer fabric disclosed in the embodiments of this application.

[0035] Figure 6 is a partial schematic diagram of the multilayer fabric, core thread, stitching thread and chain teeth disclosed in the embodiments of this application;

[0036] Figure 7 is a cross-sectional view of the area where the folded edge and the fabric body of the first type of multi-layer fabric disclosed in the embodiments of this application are attached;

[0037] Figure 8 is a cross-sectional view of the area where the folded edge and the fabric body are attached in the case of multi-layer fabric disclosed in the embodiments of this application;

[0038] Figure 9 is a cross-sectional view of the area where the folded edge and the fabric body are attached in the case of multi-layer fabrics disclosed in the embodiments of this application.

[0039] Figure 10 is a schematic diagram of a flexible bag with chain teeth disclosed in an embodiment of this application;

[0040] Figure 11 is a frontal view of the installation part, showing the state of the plastic chain teeth installed in the first embodiment;

[0041] Figure 12 is a schematic diagram of the cross-sectional structure along the AA direction in Figure 11;

[0042] Figure 13 is a frontal view of the installation part, showing the state of the plastic chain teeth installed in the second embodiment.

[0043] Figure 14 is a schematic diagram of the cross-sectional structure in the BB direction of Figure 13;

[0044] Figure 15 is a schematic cross-sectional view of the structure in the BB direction of Figure 13, showing the state of the third embodiment with plastic chain teeth installed;

[0045] Figure 16 is a schematic cross-sectional view of the structure in the BB direction of Figure 13, showing the state of the fourth embodiment with plastic chain teeth installed;

[0046] Figure 17 is a schematic cross-sectional view of the structure in the BB direction of Figure 13, showing the structure of the intermediate adhesive layer;

[0047] Figure 18 is a schematic cross-sectional view of the waterproof membrane layer in the BB direction of Figure 13.

[0048] Figure 19 is a schematic diagram of the folded edge region from the front view, showing the state before the plastic chain teeth are installed;

[0049] Figure 20 is a schematic diagram of the cross-sectional structure along the AA direction in Figure 19;

[0050] Figure 21 is a schematic diagram of the folded edge region from the front view, showing the state after the plastic chain teeth are installed in the fifth embodiment;

[0051] Figure 22 is a schematic diagram of the cross-sectional structure along the BB direction in Figure 21;

[0052] Figure 23 is a schematic diagram of the folded edge region from the front view, showing the state after the plastic chain teeth are installed in the sixth embodiment;

[0053] Figure 24 is a schematic diagram of the cross-sectional structure in the CC direction of Figure 23;

[0054] Figure 25 is a schematic diagram of the folded edge region from the front view, showing the state after the plastic chain teeth are installed in the seventh embodiment;

[0055] Figure 26 is a schematic diagram of the cross-sectional structure in the DD direction of Figure 25;

[0056] Figure 27 is a schematic diagram of the folded edge region from the front view, showing the state after the plastic chain teeth are installed in the eighth embodiment;

[0057] Figure 28 is a schematic diagram of the cross-sectional structure along the EE direction in Figure 27;

[0058] Figure 29 is a schematic diagram of the folded edge region from the front view, showing the state after the plastic chain teeth are installed in the ninth embodiment;

[0059] Figure 30 is a schematic diagram of the cross-sectional structure in the FF direction of Figure 29;

[0060] Figure 31 is a schematic diagram of the folded edge region from the front view, showing the state after the plastic chain teeth are installed in the tenth embodiment;

[0061] Figure 32 is a schematic diagram of the cross-sectional structure in the GG direction of Figure 29;

[0062] Figure 33 is a schematic diagram of the folded edge region from the front view, showing the state after the plastic chain teeth are installed in the eleventh embodiment;

[0063] Figure 34 is a schematic diagram of the cross-sectional structure in the HH direction of Figure 29;

[0064] Figure 35 is a schematic diagram of the folded edge region from the front view, showing the state after the plastic chain teeth are installed in the twelfth embodiment;

[0065] Figure 36 is a schematic diagram of the cross-sectional structure in direction II of Figure 29.

[0066] Explanation of reference numerals in the attached diagram: 10-Fabric; 10a-Bag body; 11-Fabric body; 12-Hem; 13-Connecting part; M-Sewing line; N-Fitting area; N1-Fitting closure; 20-Core thread; 30-Sewing thread; 40-Chain teeth. Detailed Implementation

[0067] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0068] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0069] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0070] Referring to Figures 1 to 10, this application discloses a flexible bag with chain teeth 40. The disclosed flexible bag includes fabric 10, core thread 20, stitching thread 30 and multiple chain teeth 40.

[0071] Fabric 10 is a basic component that provides a mounting base for structures such as core thread 20, stitch thread 30, and chain teeth 40. Fabric 10 may include a fabric body 11, a hem 12, and a connecting portion 13. The hem 12 is fitted to the edge area of ​​the fabric body 11, and the connecting portion 13 connects the edge end of the fabric body 11 and the edge end of the hem 12. Furthermore, fabric 10 can form a flexible bag body 10a, with the chain teeth 40 fixed to the edge of fabric 10 at the opening of bag body 10a to facilitate opening and closing of the opening.

[0072] For example, a flexible bag with chain teeth 40 may include a school bag, a travel bag, a sports bag, a decorative bag, etc.; correspondingly, the fabric 10 may be the fabric of a flexible bag such as a school bag, a travel bag, a sports bag, a decorative bag, etc.

[0073] In some embodiments, the fabric body 11, the hem 12, and the connecting portion 13 can be independent of each other. The edge of the hem 12 is fixedly connected to the connecting portion 13, and the edge of the fabric body 11 is fixedly connected to the connecting portion 13. Furthermore, in the thickness direction of the fabric 10, the surface of the hem 12 is in contact with the surface of the fabric body 11. The fixed connection can be achieved by bonding, welding, sewing, heat fusion, etc., and other methods are also possible, which are not specifically limited here.

[0074] In other embodiments, the fabric body 11, the hem 12, and the connecting portion 13 can also be an integral structure, that is, the fabric 10 is a single structure. In the initial state, the fabric 10 can be in a flat form. A certain width of the edge of the fabric 10 is folded 180° to form the hem 12. The area folded 180° can be regarded as the hem 12, the unfolded area can be regarded as the fabric body 11, and the area deformed during the folding process can be regarded as the connecting portion 13.

[0075] The connecting part 13 may be provided with a thread track M, through which the core thread 20 passes. Optionally, the connecting part 13 is a planar structure. When the hem 12 is in contact with the fabric body 11, the connecting part 13 deforms. As the connecting part 13 deforms, its surface gradually forms the thread track M. In this way, since the inner surface of the connecting part 13 cannot provide space to accommodate the core thread 20, the outer surface of the connecting part 13 can protrude from the outer surface of the hem 12 and the outer surface of the fabric body 11, respectively. That is, after accommodating the core thread 20, the connecting part 13 can form a convex structure.

[0076] Alternatively, the core wire 20 can be completely threaded through the cable track M, or a section of the core wire 20 can be threaded through the cable track M. The specific choice can be made based on the actual working conditions.

[0077] Considering that although the folded edge 12 and the fabric body 11 are close together, they cannot be relatively fixed, thus failing to secure the core thread 20 and causing it to move easily, in this embodiment of the application, the stitch 30 is sewn onto the fabric 10, and the connecting part 13 is locked by the stitch 30. This allows the connecting part 13 to tightly enclose the core thread 20, achieving a fixing effect and ensuring that the core thread 20 does not move arbitrarily.

[0078] Optionally, the core thread 20 located in the connecting part 13 can be directly sewn together with the fabric 10 using the sewing thread 30, so that the sewing thread 30 and the connecting part 13 together limit the core thread 20 and ensure the installation stability of the core thread 20; or the connecting part 13 can be locked by sewing the fabric 10 with the sewing thread 30, and the connecting part 13 indirectly limits the core thread 20 to ensure the installation stability of the core thread 20.

[0079] In addition, other methods can be used, such as welding, bonding, or hot melting, to fix the core wire 20 to the connector 13 to ensure the stability and firmness of the core wire 20 within the track M.

[0080] In this embodiment, multiple chain teeth 40 are arranged along the extension direction of the core thread 20, and each chain tooth 40 is connected to the area where the connecting portion 13 of the fabric 10 is located. Based on this, the chain teeth 40 can tightly wrap around the area where the core thread 20 is located, thereby stably and firmly fixing and assembling with the fabric 10.

[0081] Optionally, the multiple chain teeth 40 can be evenly arranged along the extension direction of the core thread 20; in addition, each chain tooth 40 can be connected to the connecting part 13, or each chain tooth 40 can be connected to a position near the connecting part 13 in the bonding area N of the hem 12 and the fabric body 11, or each chain tooth 40 can be connected to both the connecting part 13 and a position near the connecting part 13 in the bonding area N. Of course, other connection methods are also possible, as long as the stability and firmness of the chain teeth 40 can be guaranteed, and the specific form is not limited.

[0082] Based on the above configuration, the embodiment of this application improves the strength and rigidity of the edge area of ​​the fabric 10 by fitting the hem 12 with the fabric body 11, so that the edge of the fabric 10 is no longer excessively soft and droopy. After installing the chain teeth 40, it can help improve the installation stability of the chain teeth 40. The connecting part 13 connecting the hem 12 and the fabric body 11 can be provided with a thread track M, and the core thread 20 is set in the thread track M. In this way, the core thread 20 can be accommodated by the thread track M. Furthermore, the fabric 10 is sewn with stitch 30 to lock the connecting part 13. Thus, the core thread 20 in the thread track M can be tightly wrapped by the connecting part 13 to ensure that the core thread 20 will not move arbitrarily.

[0083] Compared to the method of fixing the core wire 20 to the surface of the fabric 10 in related technologies, the embodiment of this application uses the fabric 10 to wrap the core wire 20 tightly, which improves the stability and firmness of the core wire 20, and also helps to improve the installation stability of the chain teeth 40, making the chain teeth 40 less prone to loosening, so as to ensure the smooth opening or closing of the zipper pull on the chain teeth 40.

[0084] In some embodiments, the stitch 30 may be sewn into the contact area N between the folded edge 12 and the fabric body 11 to ensure the stability of the contact between the folded edge 12 and the fabric body 11 and to prevent the folded edge 12 from detaching from the surface of the fabric body 11.

[0085] Optionally, the thread 30 can be sewn into the bonding area N along the extension direction of the core thread 20; of course, the thread 30 can also be sewn into the bonding area N along a curved sewing path, such as a zigzag sewing path, an arc sewing path, a cross sewing path, etc.

[0086] Additionally, the seam 30 sewn in the bonding area N can be one or more, depending on the width of the hem 12. Optionally, multiple seams 30 can be arranged along the width direction of the hem 12 to further improve the stitching strength between the hem 12 and the fabric body 11, ensuring the stability and firmness of the bonding, and preventing the hem 12 from lifting off relative to the fabric 10 in any part. The width direction of the hem 12 is perpendicular to the extension direction of the core thread 20.

[0087] Considering that in some cases, it is necessary to lock the connector 13 by sewing the thread 30 into the mating area N, so as to ensure the installation stability of the core thread 20 by tightly wrapping the core thread 20 with the connector 13, the sewing position of the thread 30 can be located in the mating area N near the connector 13, so as to lock the mating area N near the connector 13 and further improve the locking effect of the connector 13.

[0088] Referring to Figures 3, 4, 7, and 8, in some embodiments, the distance between the stitching position of the suture 30 and the center line of the core thread 20 can be greater than or equal to r, and less than or equal to 2r. That is, the minimum distance between the stitching position and the center line of the core thread 20 is the radius of the core thread 20. In this case, the suture 30 is sewn to the outer surface of the core thread 20. The maximum distance between the stitching position and the center line of the core thread 20 is the diameter of the core thread 20. In this case, the distance between the outer surface of the suture 30 and the core thread 20 is the radius of the core thread 20. Wherein, r is the radius of the core thread 20.

[0089] The stitching position of the suture 30 described above can, to a certain extent, ensure the tight wrapping effect of the connecting part 13 on the core thread 20, or allow the core thread 20 to have an acceptable range (or error range) of fluctuation within the thread track M, thereby ensuring the installation stability of the core thread 20. Of course, the stitching position can also be located at other positions in the bonding area N, which is not specifically limited here.

[0090] Referring to Figures 5 and 9, in some other embodiments, the sewing thread 30 can also be sewn between the connecting portion 13 and the core thread 20. Based on this, the core thread 20 and the connecting portion 13 can be sewn and fixed together by the sewing thread 30, thereby ensuring the relative stability and firmness between the core thread 20 and the fabric 10. It should be noted that in this method, the sewing thread 30 can directly pierce through the connecting portion 13 and the core thread 20.

[0091] Optionally, the sewing position of the thread 30 can be located between the center line of the core thread 20 and the sealing opening N1 of the hem 12 and the fabric body 11. The sealing opening N1 is located on the side of the bonding area N of the hem 12 and the fabric body 11 closer to the connecting portion 13. Alternatively, it can be understood that the sealing opening N1 is located at the edge of the hem 12 and the edge of the fabric body 11. Based on this, on the one hand, the thread 30 can lock the connecting portion 13 and tightly wrap the core thread 20 through the connecting portion 13; on the other hand, the thread 30 can directly fix the core thread 20 to the connecting portion 13. Therefore, the installation stability and firmness of the core thread 20 can be further improved.

[0092] For example, there may be one or more sutures 30. When there are multiple sutures 30, the stitching strength between the joint 13 and the core thread 20 can be further improved, which is beneficial to improving the stability and firmness of the core thread 20.

[0093] In some more specific embodiments, the distance between the stitching position and the center line of the core thread 20 is greater than or equal to 1 / 3r and less than r. This method makes the stitching position closer to the seal N1, which is beneficial to improving the locking effect on the joint 13. Of course, it is not limited to this position and can be other positions, depending on the actual working conditions.

[0094] In some embodiments, the connecting portion 13 can be a cylindrical structure, the inner cavity of which is the thread channel M. It should be noted that when the fabric 10 is in a flat state, the connecting portion 13 can be a planar structure. As the hem 12 is gradually folded, the connecting portion 13 gradually bends and deforms to form a cylindrical structure, surrounding the thread channel M to provide space for accommodating the core thread 20. Optionally, the cylindrical structure can be a circular structure; of course, it can also be other shapes, which are not specifically limited here.

[0095] The sidewalls of the tubular structure may have openings, with one side of the opening connected to the edge of the fabric body 11 and the other side connected to the edge of the hem 12. Based on this arrangement, when the hem 12 is against the surface of the fabric body 11, the two sides of the opening can be brought closer together to facilitate locking the tubular structure, allowing it to tightly wrap the core thread 20 and improve its stability and strength. It should be noted that the locking effect on the opening can come from the tension of the hem 12 against the surface of the fabric 10, or from the tension of the seam thread 30, to ensure the opening is locked and to guarantee the tight wrapping of the core thread 20.

[0096] In this embodiment of the application, the fabric 10 may not be limited to one layer, as shown in Figures 2 to 5; of course, the fabric 10 may also be multiple layers, that is, the fabric 10 may include multiple fabric layers stacked together, as shown in Figures 6 to 9.

[0097] Optionally, the multiple fabric layers can be stacked by means of bonding, heat fusion, welding, sewing, etc. When the fabric 10 includes multiple fabric layers, the fabric body 11, the hem 12, and the connecting part 13 can all be composed of multiple fabric layers.

[0098] Considering that the folded edge 12 can be folded to the surface of the fabric body 11, the connecting part 13 can be deformed accordingly. Thus, after folding, the part of the innermost fabric layer located inside the folded edge 12 fits into the part of the innermost fabric layer located inside the fabric body 11, and the connecting part 13 is provided with a thread M.

[0099] Alternatively, the folded fabric 10 can be sewn together with thread 30 to tightly wrap the core thread 20. Optionally, thread 30 can be used to sew the portions of the multiple fabric layers located within the folded edge 12 and the portions of the multiple fabric layers located within the fabric body 11; of course, the portions of the multiple fabric layers located at the connecting part 13 can also be sewn to the core thread 20. The specific sewing method can be selected according to the actual working conditions.

[0100] Referring to Figures 2 and 6, when installing the chain teeth 40, each chain tooth 40 can be connected to the area of ​​the outermost fabric layer located within the joint 13. In this way, by setting multiple fabric layers, the overall strength and rigidity of the fabric 10 can be improved, thereby improving the stability and firmness of the chain teeth 40 in terms of load bearing and installation.

[0101] It should be noted that the folded edge 12 can be folded towards the side of the fabric body 11. The side facing the folding direction is the inner side, and the side away from the folding direction is the outer side.

[0102] In some embodiments, the chain teeth 40 may be connected to the area where the joint portion 13 of the fabric 10 is located by snap-fit ​​or injection molding.

[0103] When the chain tooth 40 is installed using a snap-fit ​​method, the chain tooth 40 may be equipped with a claw. Correspondingly, the area where the connecting part 13 of the fabric 10 is located may be equipped with a slot. The stability and firmness of the chain tooth 40 installation are ensured by the snap-fit ​​cooperation between the claw and the slot.

[0104] When the chain teeth 40 are installed by injection molding, the chain teeth 40 can be directly injection molded into the area where the connecting part 13 of the fabric 10 is located, so as to ensure the stability and firmness of the chain teeth 40, and also reduce the installation difficulty of the chain teeth 40.

[0105] For example, the chain tooth 40 can be a metal chain tooth or a plastic chain tooth.

[0106] When the chain tooth 40 is a metal chain tooth, it can be installed to the area where the connecting part 13 of the fabric 10 is located by means of snap-fit ​​or other methods; when the chain tooth 40 is a plastic chain tooth, it can be installed to the area where the connecting part 13 of the fabric 10 is located by means of snap-fit, injection molding or other methods.

[0107] For example, the plastic chain teeth can be rubber chain teeth, as shown in Figure 10.

[0108] In some embodiments, the contact area N between the folded edge 12 and the fabric body 11 may be provided with a connecting hole. Correspondingly, the chain tooth 40 may be provided with a connecting part, and the connecting part is provided in the connecting hole, which can further improve the installation stability and firmness of the chain tooth 40.

[0109] Optionally, when the chain tooth 40 is installed using a snap-fit ​​method, the connecting part can be a snap protrusion, the connecting hole can be a snap-fit ​​hole, and the snap protrusion and the snap-fit ​​hole engage in a snap-fit ​​fit.

[0110] When the chain tooth 40 is installed by injection molding, the connecting hole can be an injection hole and the connecting part can be an injection rod. That is, during the injection molding process, the injection material flows into the connecting hole to form an injection rod, so as to ensure the installation stability and firmness of the chain tooth 40.

[0111] In addition, the connecting hole can also be a hot-melt hole formed during the hot-melt process. The hot-melt process can also achieve the locking effect of the connecting part 13, so as to tightly wrap the core wire 20 through the connecting part 13.

[0112] Optionally, a portion of the chain tooth 40 may cover the connecting part 13 and be snapped into place with the connecting part 13, which helps to improve the installation stability and firmness of the chain tooth 40.

[0113] In summary, in this embodiment of the application, the core wire 20 is wrapped tightly with fabric 10, which improves the stability and firmness of the core wire 20 and also helps to improve the installation stability of the chain teeth 40, making the chain teeth 40 less prone to loosening, so as to ensure the smooth opening and closing of the zipper pull on the chain teeth 40.

[0114] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0115] Previously, the manufacturing process for fabric products with injection-molded zipper teeth typically involved preparing a pair of specialized fabric strips, then using injection molding to attach the zipper teeth to the edges of the fabric strips to create a zipper tooth tape. Finally, the zipper tooth tape was sewn together with the fabric to produce the fabric product with injection-molded zipper teeth. The fabric strip became an essential component of zippered fabric products. However, to increase the bonding strength between the injection-molded zipper teeth and the fabric strip, the fabric strip was generally made of synthetic materials such as polyester fiber and nylon. This resulted in thick, hard, and rough surfaces with poor elasticity. Using such zipper tooth tape in some thin fabric products would significantly affect the softness and comfort of the fabric.

[0116] To address this, improvements have been made to the manufacturing process of zipper teeth and fabric products. For example, Chinese invention patent CN108402607B discloses a zippered product, zipper tooth components, and a method for manufacturing the zippered product. The zippered product has a pair of zipper tooth components, which are formed by installing zipper teeth onto a fixing component. The zipper-mounted component has a pair of tooth mounting edges at opposite positions for mounting the tooth components. The fixing component has a tooth retaining portion and an extension portion extending further along the length relative to the tooth retaining portion. The tooth components are fixed to the tooth mounting edges of the zipper-mounted component by a sewing part for fixing the sewing thread, and the extension portion of the fixing component is fixed to the tooth mounting edges by the sewing part for fixing. This tooth mounting method eliminates the need for fabric tape, but because both the sewing thread and the fixing component have a certain degree of elasticity, they are prone to deformation under stress, causing displacement between the zipper teeth and the zipper-mounted component, resulting in large gaps that are unsightly.

[0117] In order to further improve the bonding effect between the injection-molded chain teeth and the fabric of the product, and also to avoid using the intermediate component of the fabric tape to further improve the softness and comfort of the product, the applicant thought of directly injection molding the chain teeth to the fabric of the product. However, the existing injection-molded chain tooth technology is an improvement based on the use of fabric tape. Therefore, the applicant has conducted continuous technical experiments and improvements to obtain the fabric product with directly installed plastic chain teeth proposed in this invention.

[0118] The structure of the fabric product with directly installed plastic chain teeth, which applies the technical solution of the present invention, will be further described below with reference to the accompanying drawings.

[0119] Except where explicitly stated that they are equivalent or alternative implementation schemes, the various implementation details disclosed below may be selectively applied or combined in one embodiment even if they are not directly related or synergistic in terms of function.

[0120] As shown in Figures 11 to 14, a fabric product a1 is provided for directly mounting plastic chain teeth a3. The fabric product a1 includes a mounting part a2 for mounting the plastic chain teeth a3 and a plurality of plastic chain teeth a3 installed in the mounting part a2 in a gap manner. A core thread a7 and a sewing thread a6 are arranged in the mounting part a2. The sewing thread a6 passes through the mounting part a2, and the core thread a7 is positioned in the mounting part a2 through the sewing thread a6. The plastic chain teeth a3 are installed in the mounting part a2 by injection molding and simultaneously bite the core thread a7 and the sewing thread a6.

[0121] The mounting portion a2 is a part of the fabric used to make the textile product a1. This portion is generally located at the edge of the fabric or at the edge of a partial opening in the fabric. The mounting portion a2 can be directly placed in an injection molding machine to injection mold plastic chain teeth a3. The width of the mounting portion a2 is equal to or slightly larger than the width of the plastic chain teeth a3 covering the fabric. By setting the core thread a7 and the seam thread a6, the thickness of the edge portion can be increased. After the plastic chain teeth a3 are injection molded, they can grip the core thread a7 and the seam thread a6, thereby improving the connection stability between the plastic chain teeth a3 and the mounting portion a2, and greatly improving the service life of the textile product a1. In addition, since the mounting portion a2 uses the same fabric as the textile product a1, there is no need to sew fabric tape, making the processing simpler, and the overall aesthetics and softness of the textile product a1 are better.

[0122] Since the specific structure of the installation part a2 is diverse, the common structures are single-layer or double-layer fabric a4. The following are several examples to illustrate this.

[0123] In the first embodiment, as shown in Figures 11 and 12, the mounting portion a2 is a single-layer fabric layer, with at least a portion of the stitching a6 passing through the core thread a7, and the stitching a6 binding the core thread a7. The stitching a6 not only passes through the mounting portion a2 but also through the core thread a7, thus making the core thread a7 more firmly bonded to the fabric layer, reducing the displacement of the core thread a7, and further improving the connection stability between the plastic chain tooth a3 and the mounting portion a2.

[0124] To further increase the connection stability between the plastic chain tooth a3 and the mounting part a2, as shown in Figure 12, a pre-drilled injection hole a5 is formed in the mounting part a2 by drilling. The plastic chain tooth a3 is installed in the mounting part a2 by injection molding and covers the pre-drilled injection hole a5 from top to bottom. Moreover, the plastic during injection passes through the pre-drilled injection hole a5 to form a connecting post a31 connecting the plastic chain tooth a3 located on the upper and lower sides of the mounting part a2.

[0125] The second embodiment, as shown in Figures 13 and 14, involves a concealed double-layer fabric structure a4 formed by stacking two single-layer fabrics. The double-layer fabric a4 includes an upper base fabric a41 and a lower base fabric a42. The edges of the upper base fabric a41 and the lower base fabric a42 are aligned vertically to form the mounting portion a2. A sewing thread a6 passes through the upper base fabric a41 and the lower base fabric a42. A core thread a7 is positioned on the outer edge of the lower base fabric a42, with at least a portion of the sewing thread a6 passing through the core thread a7, and the sewing thread a6 binding the core thread a7. The double-layer fabric a4 is formed by overlapping two independent single-layer fabrics with their edges aligned. Alternatively, the two fabrics can be joined together using the sewing thread a6 or an adhesive layer. The lower base fabric a42 has two sides, with the side facing the upper base fabric a41 being the inner side and the opposite side being the outer side. In this embodiment, the core thread a7 is arranged on the outer side of the edge of the lower base fabric a42, and the core thread a7 is exposed on the side of the fabric a1 facing inward, thus not affecting the overall appearance of the fabric a1. Of course, in another equivalent embodiment, the core thread a7 can also be arranged at the outer edge of the double-layer fabric a4, and then the upper base fabric a41, the lower base fabric a42 and the core thread a7 are sewn together by the seam thread a6. In this case, the core thread a7 just covers the edge of the upper base fabric a41 and the lower base fabric a42 to form a more aesthetically pleasing edge finishing structure, and at the same time improves the connection stability of the plastic chain teeth a3.

[0126] The third embodiment, as shown in Figure 15, involves a concealed double-layer fabric structure a4 formed by folding a single layer of fabric inward. The double-layer fabric a4 includes an upper base fabric a41 and a lower base fabric a42. The folded edges of the upper and lower base fabrics a41 and a42 form the mounting portion a2. A stitch a6 passes through the upper and lower base fabrics a41 and a42. A core thread a7 is positioned on the outer edge of the lower base fabric a42, with a portion of the stitch a6 passing through and binding the core thread a7. The double-layer fabric a4 structure formed by folding a single layer of fabric inward offers better overall structural strength and aesthetics, which helps ensure the connection stability of the plastic chain teeth a3.

[0127] The fourth embodiment, as shown in Figure 16, involves a concealed double-layer fabric structure a4 formed by folding a single layer of fabric inward. The double-layer fabric a4 includes an upper base fabric a41 and a lower base fabric a42. The folded edges of the upper and lower base fabrics a41 and a42 form the mounting portion a2. A stitch a6 passes through the upper and lower base fabrics a41 and a42. A core thread a7 is positioned at the edge of the double-layer fabric a4 and is wrapped within it. Part of the stitch a6 is arranged along the side of the core thread a7. The function of the stitch a6 is to restrict the displacement of the core thread on the easily loosened side while sewing the upper and lower base fabrics a41 and a42 together, thereby improving the adhesion stability of the plastic chain teeth a3.

[0128] In this embodiment, the stitching method of the suture a6 can be flexibly arranged. In the first arrangement, part of the suture a6 only simultaneously passes through the upper base fabric a41, the core thread a7, and the lower base fabric a42 to achieve the stitching. In the second arrangement, after the suture a6 passes through the inner side of the core thread a7 of the upper base fabric a41 and the lower base fabric a42, part of the suture a6 extends from the outside of the upper base fabric a41 and the lower base fabric a42 to bind them together, thus achieving the stitching. This better defines the position of the core thread a7, making it less likely for the core thread a7 to detach from the double-layer fabric a4, further improving the adhesion stability of the plastic chain teeth a3.

[0129] A further technical solution, as shown in Figure 17, may include an intermediate adhesive layer a8, which is disposed within the double-layer fabric a4. The intermediate adhesive layer a8 is used to bond the upper base fabric a41 and the lower base fabric a42 together. When the core wire a7 is wrapped by the double-layer fabric a4, the intermediate adhesive layer a8 can simultaneously bond the upper base fabric a41, the lower base fabric a42, and the core wire a7, which further defines the position of the core wire a7.

[0130] A further technical solution, as shown in Figure 18, is that a waterproof membrane layer a9 is also provided on the outer surface of the fabric layer at the installation location a2, and part of the waterproof membrane layer a9 is covered by the plastic chain teeth a3.

[0131] Previously, the manufacturing process for fabric products with injection-molded zipper teeth typically involved preparing a pair of specialized fabric strips, then using injection molding to attach the zipper teeth to the edges of the fabric strips to create a zipper tooth tape. Finally, the zipper tooth tape was sewn together with the fabric to produce the fabric product with injection-molded zipper teeth. The fabric strip became an essential component of zippered fabric products. However, to increase the bonding strength between the injection-molded zipper teeth and the fabric strip, the fabric strip was generally made of synthetic materials such as polyester fiber and nylon. This resulted in thick, hard, and rough surfaces with poor elasticity. Using such zipper tooth tape in some thin fabric products would significantly affect the softness and comfort of the fabric.

[0132] To address this, improvements have been made to the manufacturing process of zipper teeth and fabric products. For example, Chinese invention patent CN108402607B discloses a zippered product, zipper tooth components, and a method for manufacturing the zippered product. The zippered product has a pair of zipper tooth components, which are formed by installing zipper teeth onto a fixing component. The zipper-mounted component has a pair of tooth mounting edges at opposite positions for mounting the tooth components. The fixing component has a tooth retaining portion and an extension portion extending further along the length relative to the tooth retaining portion. The tooth components are fixed to the tooth mounting edges of the zipper-mounted component by a sewing part for fixing the sewing thread, and the extension portion of the fixing component is fixed to the tooth mounting edges by the sewing part for fixing. This tooth mounting method eliminates the need for fabric tape, but because both the sewing thread and the fixing component have a certain degree of elasticity, they are prone to deformation under stress, causing displacement between the zipper teeth and the zipper-mounted component, resulting in large gaps that are unsightly.

[0133] To further improve the bonding effect between the injection-molded chain teeth and the fabric of the product, and to avoid using a fabric tape as an intermediate component to further enhance the softness and comfort of the product, the applicant conceived of directly injection molding the chain teeth onto the fabric. However, existing injection-molded chain tooth technologies are all improvements based on the use of fabric tape, and there is no relevant technology applicable to directly injection molding chain teeth onto fabric. Therefore, through continuous technical experiments and improvements, the applicant has obtained the fabric product with plastic chain teeth proposed in this invention.

[0134] The structure of the fabric article equipped with plastic chain teeth, which applies the technical solution of the present invention, will be further described below with reference to the accompanying drawings.

[0135] Except where explicitly stated that they are equivalent or alternative implementation schemes, the various implementation details disclosed below may be selectively applied or combined in one embodiment even if they are not directly related or synergistic in terms of function.

[0136] Example 5

[0137] As shown in Figures 19-22, the fabric article b1 with plastic chain teeth proposed in this invention includes a concealed double-layer structure b4 formed by folding the fabric layers inward. The double-layer structure b4 includes an upper base fabric b41 and a lower base fabric b42. The folded edge area b2 of the double-layer structure b4 is used to install a plurality of spaced plastic chain teeth b3. It also includes a heat-adhesive film b21, which not only adheres to the inner edge area of ​​the lower base fabric b42 but also adheres to the upper base fabric b42. The base fabric b41 is used to achieve edge finishing at the junction of the upper base fabric b41 and the lower base fabric b42; injection molding pre-drilled holes b5 are formed by punching holes in the folded edge area b2 of the double-layer structure b4, and the plastic chain teeth b3 are installed in the folded edge area b2 of the double-layer structure b4 by injection molding and cover the injection molding pre-drilled holes b5 from top to bottom. Moreover, the plastic during injection molding passes through the injection molding pre-drilled holes b5 to form connecting posts b31 that connect the plastic chain teeth b3 located on the upper and lower sides of the double-layer structure b4.

[0138] As shown in Figures 19 and 20, which are simplified schematic diagrams of the fabric pieces constituting the textile b1, the edge region of the double-layer structure b4 is the folded edge region b2, which can be directly placed in an injection molding machine to injection mold the plastic chain teeth b3. To reduce the unraveling of the fabric edges after cutting, the fabric of the textile b1 is trimmed by laser cutting, and then the inner edge region of the lower base fabric b42 is bonded to the upper base fabric b41 by the heat-bonding film b21. As shown in Figure 20, the double-layer structure b4 includes an upper base fabric b41 and a lower base fabric b42, wherein the lower base fabric b42 is an inwardly folded layer, and generally the width of the lower base fabric b42 is greater than the width of the plastic chain teeth b3 covering the lower base fabric b42. By folding the edge area b2 where the plastic chain teeth b3 are installed, the depth of the injection-molded pre-drilled hole b5 is increased. Combined with the heat-adhesive film b21 bonding the upper and lower fabric layers, the thickness and hardness at the edge are locally strengthened. This improves the connection strength between the fabric of the textile b1 and the plastic chain teeth b3, and also enhances the ease of insertion and engagement of the zipper during use. Furthermore, since the folded edge area b2 uses the same fabric as the textile b1, there is no need to sew fabric tape, simplifying processing and improving the overall aesthetics of the textile b1.

[0139] As shown in Figures 21 and 22, the plastic chain tooth b3 includes an integrally formed main body b32 and chain tooth b33. The chain tooth b33 is connected to the side of the main body b32 and can form an engagement structure with other matching chain tooth b33. The main body b32 is used to connect with the folded edge region b2. The main body b32 includes an upper connecting part b321 and a lower connecting part b322. The connecting post b31 passes through the injection molding pre-set hole b5 and is connected to the upper connecting part b321 and the lower connecting part b322. In this way, the main body b32 and the chain tooth b33 of the plastic chain tooth b3 form a ring-shaped tight connection on the folded edge region b2 of the fabric b1. By laser-cutting the injection pre-drilled hole b5 on the double-layer structure b4, precise through holes can be made in the upper and lower layers of fabric so that the plastic chain tooth b3 can cover and form the connecting post b31 during injection molding. On the other hand, the upper and lower layers of fabric can be fused together to provide a stable connecting through hole for injection molding of the plastic chain tooth b3.

[0140] To enhance the connection stability between the plastic chain tooth b3 and the folded edge area b2 of the fabric b1, the adhesion effect of the plastic chain tooth b3 can be further enhanced by further improvements based on the above embodiment five. The following are further explanations through several specific embodiments.

[0141] Example 6

[0142] As shown in Figures 23 and 24, the system also includes a suture line b6. The suture line b6 is arranged along the folded edge region b2 of the double-layer structure b4. The suture line b6 can pass through the upper base fabric b41 and the lower base fabric b42 of the double-layer structure b4, thereby sewing the two fabric layers together. The suture line b6 is arranged on the side of the injection molding pre-placed hole b5, and part of the suture line b6 is covered by the plastic chain teeth b3. The suture line b6 can be arranged on the inner or outer side of the injection molding pre-placed hole b5, so that the suture line b6 does not obstruct the injection molding pre-placed hole 5. Furthermore, the stitching method of the suture line b6 is relatively flexible. This embodiment uses a flat stitch, where the suture line b6 is arranged parallel to the folded edge of the double-layer structure b4. The suture line b6 can be a single line or multiple lines arranged side by side. Of course, there are other stitching methods, such as the overlock stitching, where the stitching lines b6 are arranged in a crisscross pattern and wrap around a portion of the fabric near the folded edge of the double-layer structure b4, thus forming an overlock stitching structure. By setting the stitching lines b6, not only can the upper base fabric b41 and the lower base fabric b42 form a stable bond, but it can also form a concave-convex structure on the fabric, which helps to improve the bonding stability between the plastic chain teeth b3 and the folded edge area b2.

[0143] Example 7

[0144] As shown in Figures 25 and 26, the structure also includes a core thread b7. The core thread b7 is positioned at the folded edge region b2 of the double-layer structure b4 and is held between the upper base fabric b41 and the lower base fabric b42. At least one stitching line b6 extending along the length of the core thread b7 is arranged on the inner side region of the core thread b7, stitching the upper base fabric b41 and the lower base fabric b42 together. Parts of the stitching line b6 and the core thread b7 are covered by the plastic chain teeth b3. The inner side region of the core thread b7 refers to the area located next to the core thread b7 and away from the folded edge. Viewed from the front, this region is elongated and extends along the length of the core thread b7. Since the injection-molded pre-drilled hole b5 can be arranged on the inner or outer side of the stitching line b6, as in this embodiment, the injection-molded pre-drilled hole b5 is arranged on the side closer to the core wire b7. Thus, the injection-molded pre-drilled hole b5 passes through the upper base fabric b41 and the lower base fabric b42, and also partially passes through but does not break the core wire b7. Alternatively, the injection-molded pre-drilled hole b5 is arranged on the side farther from the core wire b7, and the injection-molded pre-drilled hole b5 only passes through the upper base fabric b41 and the lower base fabric b42. The stitching line b6 not only sews the upper base fabric b41 and the lower base fabric b42 but also restricts the displacement of the core wire b7 on the inner side, thereby improving the adhesion stability of the plastic chain teeth b3.

[0145] Example 8

[0146] As shown in Figures 279 and 28, the structure also includes a core wire b7. The core wire b7 is positioned at the folded edge region b2 of the double-layer structure b4 and is held between the upper base fabric b41 and the lower base fabric b42. A stitching thread b6 is provided at the location of the core wire b7. The stitching thread b6 is positioned outside the upper base fabric b41 and the lower base fabric b42 and can pass through the upper base fabric b41 and the lower base fabric b42 from the inner side region of the core wire b7, thereby externally binding the core wire b7, the upper base fabric b41, and the lower base fabric b42. Part of the stitching thread b6 and the core wire b7 are covered by the plastic chain teeth b3. By binding the core wire b7, its position is better defined, and it is less likely to come out of the double-layer structure b4, which helps improve the adhesion stability of the plastic chain teeth b3.

[0147] Based on this embodiment, a waterproof membrane layer b9 is also provided on the outer surface of the double-layer structure b4. The injection molding pre-placed hole b5 passes through the waterproof membrane layer b9, the stitching line b6 does not pass through the waterproof membrane layer b9, and part of the waterproof membrane layer b9 is covered by the plastic chain teeth b3.

[0148] Example 9

[0149] As shown in Figures 29 and 30, the fabric b1 further includes an intermediate adhesive layer b8, which is disposed in the double-layer structure b4. The double-layer structure b4 includes an upper base fabric b41 and a lower base fabric b42. The intermediate adhesive layer b8 is used to bond the upper base fabric b41 and the lower base fabric b42 together. The injection molding pre-set hole b5 formed by punching passes through the upper base fabric b41, the lower base fabric b42, and the intermediate adhesive layer b8. By setting the intermediate adhesive layer b8, the upper base fabric b41 and the lower base fabric b42 can be well bonded together without misalignment during laser processing, thus improving the stability of the processing position of the injection molding pre-set hole b5. In addition, adding the intermediate adhesive layer b8 in the middle of the double-layer structure b4 can appropriately increase the rigidity of the double-layer structure b4, which is beneficial to ensuring the smoothness of chain tooth engagement.

[0150] Example 10

[0151] As shown in Figures 31 and 32, based on Embodiment 9, a core wire b7 is also included. The core wire b7 is arranged in the folded edge region b2 of the double-layer structure b4 and is sandwiched between the upper base fabric b41 and the lower base fabric b42. The intermediate adhesive layer b8 can simultaneously bond the upper base fabric b41, the lower base fabric b42 and the core wire b7.

[0152] Example 11

[0153] As shown in Figures 33 and 34, based on Embodiment 10, a suture line b6 is also included. The suture line b6 is arranged along the extension direction of the core thread b7. The suture line b6 can pass through the upper base fabric b41 and the lower base fabric b42 of the double-layer structure b4 to sew the upper and lower fabric layers together. The suture line b6 is arranged on the side of the injection molding pre-placed hole b5, and part of the suture line b6 is covered by the plastic chain teeth b3. The intermediate adhesive layer b8 can simultaneously bond the upper base fabric b41, the lower base fabric b42, the core thread b7, and the suture line b6.

[0154] Example 12

[0155] As shown in Figures 35 and 36, based on embodiments nine and ten, a waterproof membrane layer b9 is further provided on the outer surface of the double-layer structure b4, and part of the waterproof membrane layer b9 is covered by the plastic zipper teeth 3. By providing the waterproof membrane layer b9, not only can the waterproof effect of the fabric be enhanced, but the folded edge area b2 can also be hardened to improve the convenience of using the zipper.

Claims

1. A flexible bag with chain teeth, comprising: Fabric (10), core thread (20), stitching (30) and multiple chain teeth (40); The fabric (10) includes a fabric body (11), a folded edge (12) and a connecting part (13). The folded edge (12) is attached to the edge area of ​​the fabric body (11), and the connecting part (13) is connected between the edge end of the fabric body (11) and the edge end of the folded edge (12). The connecting part (13) is provided with a wire channel (M), and the core wire (20) passes through the wire channel (M); The seam (30) is sewn onto the fabric (10) and the connecting part (13) is locked to tightly wrap the core thread (20) through the connecting part (13); Multiple chain teeth (40) are arranged along the extension direction of the core wire (20), and each chain tooth (40) is connected to the area where the connecting part (13) of the fabric (10) is located.

2. The flexible package according to claim 1, wherein, The seam (30) is sewn into the area (N) where the hem (12) meets the fabric body (11).

3. The flexible package according to claim 2, wherein, The distance between the suture position of the suture (30) and the center line of the core thread (20) is greater than or equal to r and less than or equal to 2r, where r is the radius of the core thread (20).

4. The flexible package according to claim 1, wherein, The suture (30) is sewn to the connecting part (13) and the core thread (20).

5. The flexible package according to claim 4, wherein, The stitching position of the stitch (30) is located between the center line of the core thread (20) and the fitting seal (N1) of the hem (12) and the fabric body (11), wherein the fitting seal (N1) is located on the side of the fitting area (N) of the hem (12) and the fabric body (11) closer to the connecting part (13).

6. The flexible package according to claim 5, wherein, The distance between the suture position and the center line of the core wire (20) is greater than or equal to 1 / 3r and less than r, where r is the radius of the core wire (20).

7. The flexible package according to any one of claims 1 to 6, wherein, The fabric (10) includes multiple layers of fabric, and the fabric body (11), the hem (12) and the connecting part (13) are all composed of multiple layers of the fabric. The portion of the innermost fabric layer located within the fold (12) is attached to the portion of the innermost fabric layer located within the fabric body (11), and the connecting portion (13) is provided with the thread (M); Each of the chain teeth (40) is connected to the area of ​​the outermost fabric layer located within the joint (13).

8. The flexible package according to any one of claims 1 to 6, wherein, The chain teeth (40) are connected to the area where the connecting part (13) of the fabric (10) is located by snap-fit ​​or injection molding.

9. The flexible package according to any one of claims 1 to 6, wherein, The chain teeth (40) are metal chain teeth or plastic chain teeth.

10. The flexible package according to any one of claims 1 to 6, wherein, The folded edge (12) and the fabric body (11) have a connecting hole in the fitting area (N); The chain tooth (40) has a connecting portion, which is disposed in the connecting hole.

11. The flexible package according to claim 10, wherein, The connecting hole is a hot-melt hole, an injection-molded hole, or a snap-fit ​​hole.

12. A fabric product for directly mounting plastic chain teeth, the fabric product comprising a mounting portion for mounting plastic chain teeth and a plurality of plastic chain teeth mounted in a spaced manner on the mounting portion; a core thread and a sewing thread are arranged on the mounting portion, the sewing thread is inserted through the mounting portion, the core thread is positioned on the mounting portion through the sewing thread, and the plastic chain teeth are mounted on the mounting portion by injection molding and simultaneously bite the core thread and the sewing thread.

13. The fabric article with directly mounted plastic chain teeth according to claim 12, wherein, The mounting part is a single layer of fabric, at least part of the stitches pass through the core thread, and the stitches bind the core thread.

14. The fabric article with directly mounted plastic chain teeth according to claim 13, wherein, A pre-drilled injection hole is formed at the mounting location. The plastic chain teeth are installed at the mounting location by injection molding and cover the pre-drilled injection hole from the top and bottom. The plastic during injection molding passes through the pre-drilled injection hole to form a connecting post connecting the plastic chain teeth located on the upper and lower sides of the mounting location.

15. The fabric article with directly mounted plastic chain teeth according to claim 12, wherein, The mounting part is a hidden double-layer fabric structure formed by stacking two single-layer fabrics. The double-layer fabric includes an upper base fabric and a lower base fabric. The edges of the upper and lower base fabrics are aligned vertically to form the mounting part. The sewing thread passes through the upper and lower base fabrics. The core thread is arranged on the outer edge of the lower base fabric. Part of the sewing thread passes through the core thread, and the sewing thread binds the core thread.

16. The fabric article with directly mounted plastic chain teeth according to claim 12, wherein, The mounting part is a hidden double-layer fabric structure formed by folding a single layer of fabric inward. The double-layer fabric includes an upper base fabric and a lower base fabric. The folded edges of the upper and lower base fabrics are the mounting part. The sewing thread passes through the upper and lower base fabrics. The core thread is arranged on the outer edge of the lower base fabric. Part of the sewing thread passes through the core thread, and part of the sewing thread is tied to the core thread.

17. The fabric article with directly mounted plastic chain teeth according to claim 12, wherein, The mounting part is a hidden double-layer fabric structure formed by folding a single layer of fabric inward. The double-layer fabric includes an upper base fabric and a lower base fabric. The folded edges of the upper and lower base fabrics are the mounting part. The sewing thread passes through the upper and lower base fabrics. The core thread is arranged at the folded edges of the double-layer fabric and is wrapped by the double-layer fabric. Part of the sewing thread is arranged along the side of the core thread.

18. The fabric article with directly mounted plastic chain teeth according to claim 17, wherein, Some of the stitches simultaneously pass through the upper base fabric, the core thread, and the lower base fabric.

19. The fabric article with directly mounted plastic chain teeth according to claim 17, wherein, Part of the stitching binds the upper base fabric, core thread, and lower base fabric together from the outside of the upper base fabric and the lower base fabric.

20. The fabric article with directly mounted plastic chain teeth according to any one of claims 15 to 19, wherein, It also includes an intermediate adhesive layer disposed in the double-layer fabric, the intermediate adhesive layer being used to bond the upper base fabric and the lower base fabric together.

21. The fabric article with directly mounted plastic chain teeth according to any one of claims 17 to 19, wherein, It also includes an intermediate adhesive layer, which is disposed in the double-layer fabric and can simultaneously bond the upper base fabric, the lower base fabric, and the core wire.

22. The fabric article with directly mounted plastic chain teeth according to any one of claims 12 to 19, wherein, A waterproof membrane layer is also provided on the outer surface of the fabric layer at the installation location, and part of the waterproof membrane layer is covered by the plastic chain teeth.

23. A fabric article equipped with plastic chain teeth, the fabric article comprising a concealed double-layer structure formed by folding the fabric layers inward, the double-layer structure comprising an upper base fabric and a lower base fabric; the folded edge area of ​​the double-layer structure is used to install a plurality of spaced plastic chain teeth; further comprising a heat-adhesive film, the heat-adhesive film not only adhering to the inner edge area of ​​the lower base fabric but also adhering to the upper base fabric to achieve edge finishing at the junction of the upper and lower base fabrics; injection molding pre-drilled holes are formed in the folded edge area of ​​the double-layer structure by punching holes, the plastic chain teeth are installed in the folded edge area of ​​the double-layer structure by injection molding and cover the injection molding pre-drilled holes from top and bottom, and the plastic during injection molding passes through the injection molding pre-drilled holes to form connecting posts connecting the plastic chain teeth located on the upper and lower sides of the double-layer structure.

24. The textile article with plastic chain teeth according to claim 23, wherein, It also includes a suture line arranged along the folded edge region of the double-layer structure. The suture line can pass through the upper and lower base fabrics of the double-layer structure to sew the two fabric layers together. The suture line is arranged on the side of the injection molding pre-set hole and part of the suture line is covered by the plastic chain teeth.

25. The textile article with plastic chain teeth according to claim 24, wherein, It also includes a core wire, which is arranged in the folded edge area of ​​the double-layer structure and held between the upper and lower base fabrics of the double-layer structure. At least one stitching line extending along the length of the core wire is arranged in the inner side area of ​​the core wire, and the stitching line sews the upper and lower base fabrics together. Part of the stitching line and the core wire are covered by the plastic chain teeth.

26. The textile article with plastic chain teeth according to claim 24, wherein, It also includes a core wire, which is arranged in the folded edge area of ​​the double-layer structure and held between the upper and lower base fabrics of the double-layer structure. A stitch is provided at the location of the core wire. The stitch is arranged outside the upper and lower base fabrics and can pass through the upper and lower base fabrics from the inner side area of ​​the core wire to bind the core wire, upper base fabric and lower base fabric from the outside. Part of the stitch and core wire are covered by the plastic chain teeth.

27. The textile article with plastic chain teeth according to any one of claims 24, 25 or 26, wherein, A waterproof membrane layer is also provided on the outer surface of the double-layer structure. The injection molding pre-set hole passes through the waterproof membrane layer, the stitching does not pass through the waterproof membrane layer, and part of the waterproof membrane layer is covered by the plastic chain teeth.

28. The textile article with plastic chain teeth according to claim 23, wherein, It also includes an intermediate adhesive layer, which is disposed in the double-layer structure and is used to bond the upper base fabric and the lower base fabric together; the injection molding pre-set hole passes through the upper base fabric, the lower base fabric and the intermediate adhesive layer.

29. The textile article with plastic chain teeth according to claim 28, wherein, It also includes a core wire, which is arranged in the folded edge area of ​​the double-layer structure and sandwiched between the upper and lower base fabrics, and the intermediate adhesive layer can simultaneously bond the upper base fabric, the lower base fabric and the core wire.

30. The textile article with plastic chain teeth according to claim 29, wherein, It also includes a suture thread that passes through the upper and lower base fabrics to sew the two fabric layers together. The suture thread is arranged on the side of the injection molding pre-set hole and part of the suture thread is covered by the plastic chain teeth. The intermediate adhesive layer can simultaneously bond the upper base fabric, the lower base fabric, the core thread and the suture thread.

31. The textile article with plastic chain teeth according to claim 28 or 29, wherein, A waterproof membrane layer is also provided on the outer surface of the double-layer structure. The injection molding pre-set hole passes through the waterproof membrane layer, and part of the waterproof membrane layer is covered by the plastic chain teeth.

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