A waist patch and its diaper
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-08-14
AI Technical Summary
在高速生产环境下，由于左右腰贴提手部分和后腰围区域的亲肤侧之间附着力不足，导致左右腰贴在未到达下一个固定工序前就自行打开，破坏了腰贴的预定位置，发生腰贴起翘、反折现象
Smart Images
Figure CN224628210U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a lumbar support system, and more particularly to a lumbar support with improved performance. Background Technology
[0002] In recent years, along with the continuous growth of the diaper market, new materials and technologies related to diapers have also developed rapidly. Currently, there are many types of diapers, mainly including open-loop diapers and closed-loop pull-up diapers.
[0003] To meet the need for product differentiation in different diaper designs, Velcro products have also developed into different composite product forms, mainly including Y-type composite Velcro and S-cut composite Velcro.
[0004] In the diaper manufacturing process, the left and right waist tabs are typically attached to the sides of the back waistband area, while the handles are folded towards the skin-friendly side of the back waistband. In high-speed production environments, insufficient adhesion between the handles and the skin-friendly side of the back waistband causes the waist tabs to open before reaching the next fixing step, disrupting their intended position and resulting in curling or folding. This not only leads to product defects or non-conforming products but also negatively impacts the efficiency of the entire production line, ultimately affecting product quality and stability. Utility Model Content
[0005] The main purpose of this invention is to overcome the shortcomings of the prior art and provide a waistband for diapers.
[0006] The present invention adopts the following technical solution: A waist sticker, defined as having a Y-axis along the transverse length direction and an x-axis along the longitudinal width direction, the waist sticker comprising a first substrate layer and a second substrate layer, a first adhesive layer on a first surface of the first substrate layer, a second adhesive layer on a first surface of the second substrate layer, the first substrate layer having a fixed end and a first edge end at both ends in the transverse length direction X, the second substrate layer having a joining end and a second edge end at both ends in the transverse length direction X, characterized in that: the first substrate layer includes a fixing area, a joining area, a mechanical fastener area, and a handle area extending transversely from the fixed end to the first edge end; the second substrate layer includes a folding area and a covering area extending from the joining end to the second edge end, the folding area of the second substrate layer conforming to the joining area of the first substrate layer, and the first substrate layer further including a reinforcing area.
[0007] Furthermore, the reinforcement area includes a first reinforcement area located between the mechanical fastener area and the handle area, and the coverage area of the second substrate layer at least covers the mechanical fastener area and the first reinforcement area of the first substrate layer.
[0008] Furthermore, the reinforcement area also includes a second reinforcement area, which is located between the joint area and the mechanical fastener area.
[0009] Furthermore, the peel strength between the first reinforced area of the first substrate layer and the second substrate layer is greater than the peel strength between the mechanical fastener area of the first substrate layer and the second substrate layer.
[0010] Furthermore, the peel strength between the first reinforced area of the first substrate layer and the second substrate layer is at least 30 gf / inch.
[0011] Furthermore, the first adhesive layer is not provided in the handle area.
[0012] Furthermore, the first adhesive layer is disposed in the handle area, and the handle area also includes a PE film layer.
[0013] Furthermore, the PE film layer is also provided with adhesive strips.
[0014] Furthermore, the sum of the lateral lengths of the first reinforcement area and the second reinforcement area of the first substrate layer is 30%-150% of the lateral length of the mechanical fastener area.
[0015] A diaper includes a front waistband area, a back waistband area, and a crotch area. The front waistband area is provided with a front waistband, and the back waistband area is provided with the aforementioned waist tabs. The fixing area of the first substrate layer of the waist tabs is connected to the non-skin side of the back waistband area, and the covering area of the second substrate layer is attached to the skin side of the back waistband area.
[0016] As can be seen from the above description of this utility model, compared with the prior art, the beneficial effects of this utility model are: By setting reinforcement zones with a certain peel strength at one or both ends of the mechanical fastener area, the initial adhesive force of the waistband is enhanced. Furthermore, by adjusting the lateral length of each area, the mechanical distribution between the substrate layers is optimized, resulting in a tighter bond. Improving the material and structure of the handle area increases the coefficient of friction and reduces smoothness, making the handle less prone to opening or bending during production. A second substrate layer covers the first reinforcement zone, preventing it from directly contacting the skin layer of the back waistband. This avoids excessive fibrous impurities adhering to the first reinforcement zone when the waistband is opened, which could reduce the adhesion of that area and ensure the waistband's firmness and re-closure. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a first embodiment of a waist patch according to the present invention, in a state where it is not connected to the back waistband and the second substrate layer is not unfolded; Figure 2This is a schematic diagram of a first embodiment of a waist patch according to the present invention, showing a state where it is not connected to the back waistband and the second substrate layer is unfolded; Figure 3 for Figure 1 A schematic diagram of the cross-section along the AA direction; Figure 4 for Figure 1 Installation and usage diagram; Figure 5 This is a schematic diagram of a second embodiment of the waist patch of the present invention, showing a state in which it is not connected to the back waistband and the second substrate layer is not unfolded.
[0018] Figure 6 This is a cross-sectional schematic diagram of the second embodiment of the present invention.
[0019] Figure 7 This is a planar unfolded schematic diagram of a diaper including the waist patch of this utility model; Front waist area 1, front waistband 11, back waist area 2, non-skin side of back waist area 21, skin side of back waist area 22, crotch area 3, waist patch 4, first substrate layer 41, fixing end 41a, first edge end 41b, fixing area 411, joining area 412, mechanical fastener area 413, first reinforcement area 414, second reinforcement area 415, handle area 416, second substrate layer 42, joining end 42a, second edge end 42b, folding area 421, covering area 422, PE film layer 43, low pressure sensitive adhesive 44, first adhesive layer 51, second adhesive layer 52. Detailed Implementation
[0020] The present invention will be further described below through specific embodiments. Example
[0021] like Figures 1-3 As shown, a waist sticker is defined as having a transverse length direction X and a longitudinal width direction Y. The waist sticker 4 includes a first substrate layer 41 and a second substrate layer 42. A first adhesive layer 51 is provided on the first surface of the first substrate layer 41, and a second adhesive layer 52 is provided on the first surface of the second substrate layer 42. Depending on the requirements, the first substrate layer 41 and the second substrate layer 42 can use the same material layer or different material layers, and the first substrate layer 41 and the second substrate layer 42 can also be a composite structure of different materials.
[0022] The first substrate layer 41 has a fixed end 41a and a first edge end 41b at both ends in the transverse length direction X. The first substrate layer 41 includes a fixing area 411, a joining area 412, a mechanical fastener area 413, a first reinforcement area 414, and a handle area 416 extending transversely from the fixed end 41a to the first edge end 41b. A corresponding first adhesive layer 51 is provided at the fixing area 411, the joining area 412, the mechanical fastener area 413, and the first reinforcement area 414. The joining area 412 is used to connect the second substrate layer 42. The mechanical fastener area 413 is provided with a mechanical fastener, which can be a hook shape, a mushroom shape with a vertical member and a head, or other types. The first reinforcement area 414 does not have any attachments and only includes the first adhesive layer 51 and the first substrate layer 41. In this embodiment, the handle area 416 is further provided with a first adhesive layer 51 and also includes a PE film layer 43. In other embodiments, the first adhesive layer 51 is not provided at the handle area 416; that is, only the first substrate layer 41 is provided at the handle area 416. The first adhesive layer 51 is continuous on the first substrate layer 41. In the actual finished product, the second surface of the second substrate layer 42 is in close contact with the mechanical fastener area 413 and the first reinforcement area 414 of the first substrate layer 41.
[0023] The second substrate layer 42 has a joint end 42a and a second edge end 42b at both ends in the transverse length direction X. The second substrate layer 42 includes a folded area 421 and a covering area 422 extending from the joint end 42a to the second edge end 42b. The folded area 421 of the second substrate layer 42 is attached to the joint area 412 of the first substrate layer 41, and the covering area 422 of the second substrate layer 42 at least covers the mechanical fastener area 413 and the first reinforcement area 414. In some embodiments, the covering area 422 of the second substrate layer 42 also covers part or all of the handle area 416.
[0024] The peel strength between the first reinforcing area 414 and the second substrate layer 42 is greater than the peel strength between the mechanical fastener area 413 and the second substrate layer 42. Further, the peel strength between the first reinforcing area 414 and the second substrate layer 42 is at least 30 gf / inch. Specifically, the peel strength between each area and the second substrate layer 42 is measured using a 90° peel tester. Further, a second reinforcing area 415 is also provided between the bonding area 412 and the mechanical fastener area 413, and the peel strength between the second reinforcing area 415 and the second substrate layer 42 is not greater than the peel strength between the first reinforcing area 414 and the second substrate layer 42. Further, the second surface of the second substrate layer 42 is made of a release film, which is non-adhesive or only slightly adhesive after contact with the first reinforcing area 414, allowing the waistband to open and close smoothly, thus ensuring the re-closure of the waistband.
[0025] Furthermore, the sum of the lateral lengths of the first reinforcement area 414 and the second reinforcement area 415 is 30%-150% of the lateral length of the mechanical fastener area 413. Furthermore, the lateral length of the handle area 416 is 3-7mm, and the shape of the edge of the handle area 416 is not limited. In this embodiment, the edge of the handle area is wavy to facilitate lifting.
[0026] Furthermore, the coefficient of friction of the PE film layer 43 is not less than 1.5. In some embodiments, the coefficient of friction of the material is increased by adding some elastic material to the composite PE film material in the handle area 416. The material formulation can be: LDPE, 25-30 parts, LLDPE, 35-38 parts, HDPE, 40-45 parts, color masterbatch, 8-10 parts, heavy CaCO3, 10-13 parts; SIS, 2.5-3.5 parts, EVA, 1.5-2.5 parts. The coefficient of friction of the PE film layer can be increased by SIS and EVA. In some embodiments, the PE film in the handle area 416 is an anti-slip film with raised dots, which increases the coefficient of friction of the PE film layer.
[0027] Furthermore, the handle area 416 also includes low-pressure sensitive adhesive 44 to improve the adhesion between the handle area 416 and the material, and to prevent the handle from opening on its own during high-speed production, thus avoiding product defects.
[0028] like Figure 7 As shown, this utility model also provides a diaper, including a front waist area 1, a back waist area 2, and a crotch area 3. The front waist area 1 is provided with a front waistband 11. The back waist area 2 includes a non-skin side 21 and a skin side 22 of the back waist area. The back waist area 2 is provided with a waist patch 4 as described above. The fixing area 411 of the first substrate layer 41 is connected to the non-skin side 21 of the back waist area, and the covering area 422 of the second substrate layer 42 is connected to the skin side 22 of the back waist area.
[0029] like Figure 4 The installation and use of the waist patch 4 shown is as follows: When installing the waist patch 4, the fixing area 411 of the first base material layer 41 is attached to the non-skin side 21 of the back waist. Then, the remaining part of the waist patch 4 is folded towards the skin side 22 of the back waist and fixed to the skin side 22 of the back waist through the second adhesive layer 52. When using the waist patch 4, the fingers pinch the handle area 416 to lift it up and fix the waist patch 4 to the front waist belt 11 to achieve wearing.
[0030] By setting reinforcement zones with a certain peel strength at one or both ends of the mechanical fastener area, the initial adhesive force of the waistband is enhanced. Furthermore, by adjusting the lateral length of each area, the mechanical distribution between the substrate layers is optimized, resulting in a tighter bond. Improving the material and structure of the handle area increases the coefficient of friction and reduces smoothness, making the handle less prone to opening or bending during production. A second substrate layer covers the first reinforcement zone, preventing it from directly contacting the skin layer of the back waistband. This avoids excessive fibrous impurities adhering to the first reinforcement zone when the waistband is opened, which could reduce the adhesion of that area and ensure the waistband's firmness and re-closure. Example
[0031] like Figures 5-6 As shown, the difference in the second embodiment is that only a first reinforcing area 414 is provided on the first substrate layer 41, and there is no second reinforcing area 415 between the joining area 412 and the mechanical fastener area 413.
[0032] The above are only a few specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.
Claims
1. A waist sticker, defined as having a transverse length direction X and a longitudinal width direction Y, the waist sticker comprising a first substrate layer and a second substrate layer, a first adhesive layer being provided on a first surface of the first substrate layer, a second adhesive layer being provided on a first surface of the second substrate layer, the first substrate layer having fixed ends and first edge ends at both ends in the transverse length direction X, and the second substrate layer having joint ends and second edge ends at both ends in the transverse length direction X, characterized in that: The first substrate layer includes a fixing area, a joining area, a mechanical fastener area, and a handle area extending laterally from the fixing end to the first edge end. The second substrate layer includes a folding area and a covering area extending from the joining end to the second edge end. The folding area of the second substrate layer is attached to the joining area of the first substrate layer. The first substrate layer also includes a reinforcement area.
2. The waist patch of claim 1, wherein: The reinforcement area includes a first reinforcement area, which is located between the mechanical fastener area and the handle area, and the coverage area of the second substrate layer at least covers the mechanical fastener area and the first reinforcement area of the first substrate layer.
3. The waist patch of claim 2, wherein: The reinforcement area also includes a second reinforcement area, which is located between the joint area and the mechanical fastener area.
4. The waist patch of claim 3, wherein: The peel strength between the first reinforced area of the first substrate layer and the second substrate layer is greater than the peel strength between the mechanical fastener area of the first substrate layer and the second substrate layer.
5. A waist patch according to claim 4, wherein: The peel strength between the first reinforced area of the first substrate layer and the second substrate layer is at least 30 gf / inch.
6. A waist patch according to claim 5, wherein: The first adhesive layer is not provided in the handle area.
7. The waist patch of claim 5, wherein: The first adhesive layer is disposed in the handle area, and the handle area also includes a PE film layer.
8. The waist patch of claim 7, wherein: The PE film layer is also provided with adhesive strips.
9. The waist patch according to claim 3, wherein: The sum of the lateral lengths of the first reinforcement area and the second reinforcement area of the first substrate layer is 30%-150% of the lateral length of the mechanical fastener area.
10. A paper diaper comprising a front waist region, a back waist region, and a crotch region, the front waist region being provided with a front waist seal, characterized in that: The lower back area is provided with a waist patch as described in any one of claims 1 to 9; the fixing area of the first substrate layer of the waist patch is connected to the non-skin side of the lower back area, and the covering area of the second substrate layer is attached to the skin side of the lower back area.