A high-resilience underwear adhesive structure
By designing a water-based TPU bra structure with an outer cup pad, an inner cup pad, and a zipper connection in the bra cup pad, combined with a latex filling layer and micro Velcro, the problem of traditional bra cup pads falling off due to shear force is solved, achieving high resilience and stability, and improving the convenience and comfort of bra use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INFINITY WORLD GROUP CO LTD
- Filing Date
- 2025-04-10
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional bra cup pads are prone to falling off due to weak adhesion stability caused by biodynamic shear forces during prolonged wear, affecting ease of use and environmental suitability.
A highly resilient bra structure is designed, using a water-based TPU bra body with an inner cup pad body, including an outer cup pad and an inner cup pad, connected by a zipper. A filling mechanism is installed on the inner side, and the filling layer is an arc-shaped sheet structure made of latex material. The outer and inner sides are fixed with adhesive layers, and the outer side is fixed with micro Velcro to avoid direct skin contact and improve stability.
It enhances the support and comfort of bra cup pads, reduces friction and shear force caused by activities, improves the stability and wearing comfort of bras, extends their service life, and meets personalized thickness requirements.
Smart Images

Figure CN224572268U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of underwear bonding, specifically to an ultra-high elasticity underwear adhesive structure, namely, a special water-based TPU underwear. Background Technology
[0002] Water-based TPU is highly favored as a material for underwear manufacturing due to its environmental friendliness, softness, comfort, high transparency, and good water resistance. As a fully water-based coating material, it is DMF-free and low in VOCs, meeting modern consumers' pursuit of health and environmental protection. Its soft and durable properties provide wearers with an excellent comfort experience, while the optional transparency meets diverse design needs. In underwear applications, whether it is seamless underwear, sports underwear, or shaping underwear, water-based TPU can perform excellently, achieving a perfect combination of shaping and comfort. With the development of market trends, the application prospects of water-based TPU in underwear manufacturing are becoming increasingly broad.
[0003] To enhance comfort, latex pads are often added to bras made from water-based TPU. Current latex bras offer high resilience, breathability, and shaping properties. However, a problem exists in practical use: traditional pads are typically single-layered. Some users, considering the bra's shaping, support, and warmth, attach an outer pad to the inside of the bra. During prolonged wear, this inner pad comes into direct contact with the user's skin. Body movement creates shear forces between the pad and the bra body. If the traditional adhesive is not strong enough, the pad may detach. Therefore, the inventor urgently needs to design a bra pad that minimizes the impact of bio-dynamic shear forces on the connection strength of the outer pad, thereby improving the ease of use and environmental adaptability of the bra pad. Utility Model Content
[0004] Therefore, the purpose of this utility model is to provide an ultra-high elasticity underwear adhesive structure to solve the technical problem that external biological dynamic shear force will adversely affect the connection strength between the outer padding layer and the underwear.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-resilience underwear adhesive structure, comprising a water-based TPU underwear body, with a cup pad body attached to the inner side of the water-based TPU underwear body. The cup pad body includes an outer cup pad and an inner cup pad, with an installation cavity formed between the outer cup pad and the inner cup pad. One side of the outer cup pad and the inner cup pad are fixedly connected, and the other side of the outer cup pad and the inner cup pad are openable via a zipper. A filling mechanism is installed inside the installation cavity to adjust the thickness of the cup pad body.
[0006] By adopting the above technical solution, the installation cavity formed between the outer cup pad and the inner cup pad enables flexible installation and disassembly of the filling mechanism, thereby facilitating the adjustment of the thickness of the cup pad body. This not only meets the personalized needs of different users for the thickness of the bra cup pad, but also improves the wearing comfort and adaptability of the bra.
[0007] Furthermore, the filling mechanism includes a main filling layer, which is made of latex material and has an arc-shaped sheet structure.
[0008] By adopting the above technical solutions, latex material has excellent resilience and plasticity, which can effectively improve the support and comfort of bra cup pads, allowing the bra to better conform to the curve of the chest and provide stable support. At the same time, the main filling layer has an arc-shaped sheet structure, which not only conforms to the ergonomic principle, but also better adapts to the shape of the chest and improves the comfort of wearing.
[0009] Furthermore, an outer adhesive layer and an inner adhesive layer are fixedly bonded to the front and rear sides of the main filling layer, respectively, and the main filling layer is bonded and fixed to the internal mounting cavity of the coaster body through the outer adhesive layer and the inner adhesive layer.
[0010] By adopting the above technical solution, the main filling layer can be firmly adhered to the internal mounting cavity of the coaster body, making it difficult to fall off or shift. At the same time, the use of adhesive layer simplifies the installation process of the filling mechanism and improves production efficiency.
[0011] Furthermore, the main filler layer, outer adhesive layer, and inner adhesive layer are provided with several through holes for ventilation.
[0012] By adopting the above technical solution, the breathability of the underwear is greatly improved. The presence of pores allows air to circulate freely inside the underwear, effectively reducing the stuffiness and dampness caused by prolonged wear and improving wearing comfort.
[0013] Furthermore, the outer and inner coasters are connected by a zipper to form a channel for the main filling layer to access the internal mounting cavity of the coaster body, and the zipper is a traceless zipper.
[0014] By adopting the above technical solution, the installation and replacement of the filling mechanism becomes extremely convenient. Users can easily access the installation cavity by simply pulling open the zipper to add, remove or replace the filling mechanism.
[0015] Furthermore, several micro Velcro straps are installed on the outer side of the coaster body, and the coaster body is adhered and fixed to the inner wall of the water-based TPU underwear by the micro Velcro straps.
[0016] By adopting the above technical solution, the main body of the cup pad can be firmly attached to the inner wall of the bra, making it difficult to fall off or shift. The use of micro Velcro not only improves the stability of the bra, but also simplifies the wearing process. Users only need to align the main body of the cup pad with the inner wall of the water-based TPU bra and press gently to achieve adhesion and fixation.
[0017] In summary, the present invention has the following main advantages:
[0018] 1. This utility model uses a zipper and filling mechanism to install the main filling layer on the inside of the cup pad body. This installation method effectively avoids direct contact between the main filling layer and the skin. Traditionally, the outer padding layer installed on the inside of the underwear is in direct contact with the skin and is easily affected by the shear force generated by human movement during wear, which can cause the padding layer to fall off or shift. However, this design reduces this direct friction and shear force by using an internal main filling layer, thereby significantly improving the installation stability of the main filling layer, extending the service life of the underwear, and also improving the environmental applicability of the underwear.
[0019] 2. This utility model uses several micro Velcro straps to attach and fix the main body of the cup pad to the inner wall of the underwear. This fixing method provides strong adhesion, ensuring that the main body of the cup pad is not easy to fall off or shift during wear, thereby improving the stability and wearing comfort of the underwear. The use of micro Velcro straps allows the main body of the cup pad to fit tightly against the inner wall of the underwear, reducing friction and shaking caused by movement, and further enhancing the support and shaping effect of the underwear. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural diagram of the assembly of the water-based TPU underwear and the cup pad body according to this utility model;
[0021] Figure 2 This is a three-dimensional structural diagram of the main body of the coaster of this utility model;
[0022] Figure 3 This is an exploded structural diagram of the main body of the coaster of this utility model;
[0023] Figure 4 This is a three-dimensional structural diagram of the filling mechanism of this utility model;
[0024] Figure 5 This is a schematic diagram of the back structure of the filling mechanism of this utility model.
[0025] In the diagram: 100, Water-based TPU underwear body; 1, Cup pad body; 101, Outer cup pad; 102, Inner cup pad; 103, Zipper; 2, Filling mechanism; 201, Main filling layer; 202, Outer adhesive layer; 203, Inner adhesive layer; 204, Through hole. Detailed Implementation
[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0027] Example 1:
[0028] A type of ultra-high resilience underwear adhesive structure, such as Figure 1-5 As shown, the bra includes a water-based TPU bra body 100, with a cup pad body 1 attached to the inner side of the water-based TPU bra body 100. The cup pad body 1 includes an outer cup pad 101 and an inner cup pad 102, with an installation cavity formed between the outer cup pad 101 and the inner cup pad 102. One side of the outer cup pad 101 and the inner cup pad 102 are fixedly connected, and the other side of the outer cup pad 101 and the inner cup pad 102 are openable via a zipper 103. A filling mechanism 2 is installed inside the installation cavity to adjust the thickness of the cup pad body 1. The outer cup pad 101 and the inner cup pad 102 are... The installation cavity formed between the two allows for flexible installation and disassembly of the filling mechanism 2, thus facilitating the adjustment of the thickness of the cup pad body 1. This not only meets the personalized needs of different users for the thickness of the bra cup pads but also improves the comfort and adaptability of the bra. At the same time, the outer cup pad 101 and the inner cup pad 102 are fixedly connected on one side and have an openable structure on the other side via a zipper 103. This ensures the overall stability of the cup pad body 1 and facilitates the installation and replacement of the filling mechanism 2, greatly improving the ease of use and maintenance efficiency of the bra.
[0029] See Figure 3 , Figure 4 , Figure 5 The filling mechanism 2 includes a main filling layer 201, which is made of latex and has an arc-shaped sheet structure. Latex has excellent resilience and plasticity, which can effectively improve the support and comfort of the bra cup pads, allowing the bra to better fit the curve of the chest and provide stable support. At the same time, the arc-shaped sheet structure of the main filling layer 201 not only conforms to the ergonomic principle and can better adapt to the shape of the chest, improving the comfort of wearing, but also has good breathability and antibacterial properties, which helps to keep the inside of the bra dry and hygienic.
[0030] See Figure 4 , Figure 5The main filling layer 201 has an outer adhesive layer 202 and an inner adhesive layer 203 fixedly bonded to its front and rear sides, respectively. The main filling layer 201 is bonded and fixed to the internal mounting cavity of the cup pad body 1 through the outer adhesive layer 202 and the inner adhesive layer 203, so that the main filling layer 201 can be firmly bonded to the internal mounting cavity of the cup pad body 1, and is not easy to fall off or shift. At the same time, the use of adhesive layers also simplifies the installation process of the filling mechanism 2 and improves production efficiency. In addition, the selection of the outer adhesive layer 202 and the inner adhesive layer 203 also takes into account the compatibility and adhesion with latex material, ensuring a tight connection between the filling mechanism and the cup pad body, thereby improving the overall stability and durability of the underwear.
[0031] See Figure 4 , Figure 5 The main filling layer 201, the outer adhesive layer 202, and the inner adhesive layer 203 are provided with several through holes 204 for ventilation, which greatly improves the breathability of the underwear. The presence of through holes 204 allows air to circulate freely inside the underwear, effectively reducing the stuffiness and dampness caused by wearing it for too long, and improving the comfort of wearing it. At the same time, the setting of through holes 204 also helps to reduce the weight of the underwear, making it lighter and easier to wear. In addition, the uniform distribution of through holes 204 also takes into account the overall structural stability of the underwear, avoiding deformation or damage to the underwear caused by too many openings or uneven distribution.
[0032] See Figure 2 , Figure 3 The outer cup pad 101 and inner cup pad 102 are opened and closed by the zipper 103 to form a channel for the main filling layer 201 to access the internal installation cavity of the cup pad body 1. The zipper 103 is a traceless zipper, which makes the installation and replacement of the filling mechanism 2 extremely convenient. Users can easily access the installation cavity by simply pulling the zipper 103 to add, remove or replace the filling mechanism. At the same time, the zipper 103 adopts a traceless design, which avoids leaving obvious marks on the surface of the cup pad body 1 and maintains the overall aesthetics of the underwear. In addition, the use of a traceless zipper also improves the wearing comfort of the underwear and reduces the discomfort caused by the zipper rubbing against the skin.
[0033] Example 2:
[0034] See Figure 2 , Figure 3The outer side of the cup pad body 1 is equipped with several micro Velcro straps. The cup pad body 1 is fixed to the inner wall of the water-based TPU underwear by the micro Velcro straps, so that the cup pad body 1 can be firmly attached to the inner wall of the underwear and is not easy to fall off or shift. The use of micro Velcro straps not only improves the stability of the underwear, but also simplifies the wearing process. Users only need to align the cup pad body 1 with the inner wall of the water-based TPU underwear and press gently to achieve adhesion and fixation. At the same time, the micro Velcro straps also have good reusability. Users can stick and peel off the cup pad body 1 multiple times without significantly affecting its adhesion.
[0035] The implementation principle of this embodiment is as follows: The coaster body 1 is composed of an outer coaster 101 and an inner coaster 102, with an installation cavity formed between them. When the main filling layer 201 needs to be installed in the installation cavity, firstly, the zipper 103 on one side is opened to form a channel communicating with the inner installation cavity. Then, the main filling layer 201 is placed inside the installation cavity, and the main filling layer 201 is adhered to the inside of the installation cavity using the outer adhesive layer 202 and the inner adhesive layer 203. Finally, the zipper 103 is closed. After completing the assembly of the main filling layer 201 and the cup pad body 1, the thickness of the cup pad body 1 can be adjusted, improving the ease of use and environmental applicability of the cup pad. Then, the cup pad body 1 is installed on the inside of the bra. In the above principle, the main filling layer 201 is installed on the inside of the cup pad body 1. This installation method replaces the traditional outer pad layer installed on the inside of the bra, avoiding direct skin contact between the main filling layer 201 and the skin. This can directly avoid the shear force generated during the user's wearing process from affecting the installation strength of the main filling layer 201.
[0036] In this embodiment, the disassembly and installation structure of the cup pad body 1 and the water-based TPU underwear is a conventional technical means in the field. Most of them form an opening channel on one side of the underwear to access the inside of the underwear, so as to place the cup pad body (1) into the inside of the underwear. Therefore, the applicant will not elaborate on it here.
[0037] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. A high-resilience underwear adhesive structure, comprising a water-based TPU underwear body (100), wherein a cup pad body (1) is attached to the inner side of the water-based TPU underwear body (100), characterized in that: The coaster body (1) includes an outer coaster (101) and an inner coaster (102). An installation cavity is formed between the outer coaster (101) and the inner coaster (102). One side of the outer coaster (101) and the inner coaster (102) are fixedly connected. The other side of the outer coaster (101) and the inner coaster (102) is openable through a zipper (103). A filling mechanism (2) is installed inside the installation cavity to adjust the thickness of the coaster body (1).
2. The super-high resiliency underwear gum structure according to claim 1, characterized by: The filling mechanism (2) includes a main filling layer (201), which is made of latex material and has an arc-shaped sheet structure.
3. The super-high resiliency underwear gum structure according to claim 2, characterized by: The front and rear sides of the main filling layer (201) are respectively fixedly bonded with an outer adhesive layer (202) and an inner adhesive layer (203). The main filling layer (201) is bonded and fixed to the internal mounting cavity of the coaster body (1) through the outer adhesive layer (202) and the inner adhesive layer (203).
4. The super-high resiliency brassiere gel structure according to claim 3, characterized by: The main filling layer (201), the outer adhesive layer (202), and the inner adhesive layer (203) are provided with several through holes (204) for ventilation.
5. The super-high resiliency brassiere gel structure according to claim 1, characterized by: The outer coaster (101) and inner coaster (102) are opened and closed by a zipper (103) to form a channel for the main filling layer (201) to access the internal mounting cavity of the coaster body (1). The zipper (103) is a traceless zipper.
6. The super-high resiliency underwear gum structure according to claim 1, wherein: The outer side of the coaster body (1) is fitted with several micro Velcro straps, and the coaster body (1) is fixed to the inner wall of the water-based TPU underwear by the micro Velcro straps.