A disposable absorbent article

Abstract

The utility model relates to a disposable sanitary product field especially, and more particularly to a disposable absorbent article, including absorbent core, be used for placing and support the base structure of absorbent core and be used for covering or partly covering the surface layer structure of absorbent core, the two sides of base structure are connected with partial surface layer structure respectively, the inside two sides of surface layer structure and be located at the width direction of absorbent core or the upper end two sides of absorbent core are provided with flexible strip, the flexible strip is located the upper outer side or the upper inner side or the upper coincident line of absorbent core width direction edge, and the interval of flexible strip and absorbent core width direction edge is 0 10mm, the height of flexible strip is 1 10mm, the flexible strip is foamed material, and the foaming ratio is 5 100 times, under the condition of 0.2 1PSI, the compression deformation of flexible strip exceeds 30%, and the height resilience rate is greater than 50%. Its solved the technical problem that the present disposable sanitary product is easier to produce side leakage.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products, and more particularly to a disposable absorbent product. Background Technology

[0002] Currently, traditional disposable absorbent products typically consist of an absorbent core, a base structure, and a top layer. The absorbent core is the core component, responsible for absorbing and storing liquids. It is generally composed of materials such as superabsorbent polymers and wood pulp fibers, possessing excellent liquid absorption and retention capabilities. The base structure is used to place and support the absorbent core, and is often a breathable membrane, such as a PE microporous membrane. It prevents liquid leakage while ensuring air circulation, reducing stuffiness. The top layer comes into direct contact with the user's skin, covering or partially encasing the absorbent core. It is usually made of non-woven fabric, which is soft and skin-friendly, allowing liquids to quickly permeate and be guided to the absorbent core.

[0003] However, in actual use, traditional disposable absorbent products still have some problems that urgently need to be solved. When the user is active, such as walking, sitting, or turning over, the absorbent core may shift or deform due to gravity and body movement after absorbing liquid. This shift and deformation will reduce the fit between the absorbent core and the user's body, making it difficult for liquid to be accurately absorbed by the absorbent core, which can easily lead to side leakage, staining clothes and causing embarrassment and inconvenience to the user.

[0004] To address these issues, the industry has attempted several improvements. For example, three-dimensional protective barriers made of elastic material are installed on both sides of the absorbent core, which can prevent liquid leakage to some extent. However, these barriers rely primarily on the contractile force of the elastic material to conform to the body. When the user moves significantly, the barriers may lose their elasticity due to uneven stress, failing to effectively block liquid, and the leakage problem persists.

[0005] Some products incorporate flow channels in their surface structure. These channels can quickly guide the liquid to different parts of the absorbent core, improving absorption efficiency. However, flow channels cannot solve the problem of absorbent core displacement and deformation. After the absorbent core shifts, the flow channel's guiding effect is also affected, making it impossible to guarantee accurate liquid absorption. Utility Model Content

[0006] Therefore, in view of the above problems, this utility model proposes a disposable absorbent product, which solves the technical problem that existing disposable sanitary products are prone to side leakage.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a disposable absorbent product, comprising an absorbent core, a base structure for placing and supporting the absorbent core, and a surface structure for covering or partially encasing the absorbent core. The base structure is connected to a portion of the surface structure on both sides. Flexible strips are provided on both sides of the surface structure within the absorbent core, located in the width direction of the absorbent core or on both sides of the upper end of the absorbent core. The flexible strips are located on the upper outer side, upper inner side, or upper overlapping line of the edge in the width direction of the absorbent core. The distance between the flexible strips and the edge in the width direction of the absorbent core is 0-10mm. The height of the flexible strips is 1-10mm. The flexible strips are made of foamed material with a foaming ratio of 5-100 times. Under a pressure of 0.2-1 PSI, the compression deformation of the flexible strips exceeds 30%, and the height resilience is greater than 50%.

[0008] Furthermore, the cross-sectional shape of the flexible strip is circular, elliptical, or polygonal.

[0009] Furthermore, the flexible strip is made of at least one of PU foam, PE foam, or EVA foam.

[0010] Furthermore, the cross-section of the flexible strip is not uniform.

[0011] Furthermore, the surface of the flexible strip is provided with a number of evenly distributed micro-protrusions, the height of which is 0.1-0.5mm.

[0012] Furthermore, the flexible strips are continuously or intermittently arranged along the width direction of the absorbent core. When intermittently arranged, the spacing between two adjacent flexible strips is 2-10mm.

[0013] Furthermore, the surface of the flexible strip is provided with a hydrophobic coating or a hydrophobic surface layer.

[0014] Furthermore, a reinforcing structure is provided at the center of the flexible strip. The reinforcing structure is a flexible fiber bundle or flexible fiber strip extending along the length direction of the flexible strip, and the diameter of the fiber bundle or fiber strip is 0.01-0.2 mm.

[0015] Furthermore, when the flexible strip is located on the upper outer side of the absorbent core in the width direction, absorbent reinforcement portions are provided on both sides of the absorbent core in the width direction. When the flexible strip is located on the upper inner side of the absorbent core, absorbent reinforcement portions are provided on the absorbent core at the side where the two PE round strips are close to each other.

[0016] Furthermore, the disposable absorbent product is a sanitary napkin, diaper, or panty liner.

[0017] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0018] 1. Flexible strips are installed on both sides inside the surface layer structure, along the width direction of the absorbent core. These strips are located on the upper outer, upper inner, or upper overlapping line of the edge of the absorbent core in the width direction, with a reasonable distance from the edge. Their height and foaming ratio are also within a specific range. Under 0.2-1 PSI conditions, the compression deformation exceeds 30%, and the height resilience is greater than 50%. This design allows the flexible strips to provide stable support and positioning for the absorbent core, preventing displacement and deformation during use, ensuring a good fit between the absorbent core and the user's body, improving absorption efficiency, and reducing the risk of side leakage. Simultaneously, the good elasticity and resilience ensure that the flexible strips can quickly recover after being subjected to pressure, continuing to function, and improving the contact between the surface layer and the skin, reducing pressure and friction, and enhancing user comfort.

[0019] 2. The cross-sectional shape of the flexible strip is designed to be circular or elliptical. A circular cross-section makes the flexible strip more uniformly stressed in all directions, better adapting to the pressure from different directions caused by body movements and providing stable support. An elliptical cross-section allows the ratio of the major and minor axes to be adjusted according to actual needs, satisfying the support and positioning functions while better conforming to the body curves, further improving the cooperation with the absorbent core and surface structure, and enhancing the overall performance.

[0020] 3. The cross-section of the flexible strip is not uniform. This design allows it to better adapt to the irregular shape of the body and the stress on the absorbent core in different areas. The uneven cross-section provides stronger support in specific areas while remaining relatively soft in others. This effectively prevents the absorbent core from shifting and reduces localized pressure on the skin, making the user feel more comfortable. It also improves the adaptability of disposable absorbent products to different usage scenarios and physical conditions.

[0021] 4. Several evenly distributed micro-protrusions are set on the surface of the flexible strip. These micro-protrusions increase the friction between the flexible strip and the surface layer structure, making the connection between the flexible strip and the surface layer structure more stable and less prone to relative slippage. This allows for better support and positioning of the absorbent core. Furthermore, the height of the micro-protrusions is 0.1-0.5mm, which will not significantly affect the feel against the skin and will not compromise wearing comfort.

[0022] 5. The flexible strips are set continuously or intermittently along the width of the absorbent core. When set continuously, they can provide continuous and stable support for the absorbent core, ensuring that the absorbent core maintains a good shape and position throughout the width direction. When set intermittently, there is a gap between two adjacent flexible strips. This design can save material costs while ensuring the support effect on the absorbent core, and make disposable absorbent products more flexible when bending and folding, improving the convenience and comfort of use.

[0023] 6. Applying a hydrophobic coating or surface layer to the flexible strip effectively prevents liquid from penetrating into its interior, maintaining its dryness and elasticity. A dry flexible strip can better perform its supporting and positioning functions, preventing a decrease in support due to softening from water absorption. Simultaneously, the hydrophobic surface reduces liquid residue on the flexible strip, lowering the risk of bacterial growth, maintaining the hygienic properties of disposable absorbent products, and extending their lifespan.

[0024] 7. A reinforcing structure, such as flexible fiber bundles or strips extending along the length of the flexible strip, is incorporated at its center. This significantly improves the strip's strength and toughness. Under significant pressure or tension, the reinforcing structure prevents the flexible strip from breaking or deforming excessively, ensuring it consistently provides stable support for the absorbent core. Furthermore, the small diameter of the flexible fiber bundles or strips does not affect the overall softness and elasticity of the flexible strip, guaranteeing user comfort.

[0025] 8. When the flexible strip is located in different positions, an absorption reinforcement section is set at the corresponding position of the absorbent core to specifically improve the liquid absorption capacity of the absorbent core in key areas. If the flexible strip is located on the upper outer side in the width direction of the absorbent core, the absorption reinforcement section can enhance the absorption of liquid on the outer side and prevent side leakage; when the flexible strip is located on the upper inner side of the absorbent core, the absorption reinforcement section can better absorb the liquid on the side where the two flexible strips are close to each other, improve the overall absorption efficiency, and further enhance the leak-proof performance of disposable absorbent products.

[0026] 9. Choose at least one of PU foam, PE foam, or EVA foam as the material for the flexible strip. These materials all possess good flexibility, elasticity, and foaming properties. PU foam offers excellent abrasion resistance and chemical corrosion resistance; PE foam is lightweight, soft, and relatively inexpensive; and EVA foam provides good cushioning performance and is environmentally friendly. Depending on different usage requirements and cost considerations, selecting appropriate foam materials or using a combination thereof can meet the performance requirements of disposable absorbent products in various scenarios, while ensuring product quality and reliability.

[0027] 10. This disposable absorbent product is designed in multiple forms, including sanitary napkins, diapers, and panty liners, to meet the needs of different groups and usage scenarios. Sanitary napkins are suitable for women during menstruation, diapers are suitable for infants or incontinent individuals, and panty liners can be used to absorb minor daily secretions or as an adjunct to sanitary napkins. This diversified product design expands the product's applicability, enhances its market competitiveness, and provides consumers with more choices. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is a structural schematic diagram of the second setting method of the flexible strip in this utility model.

[0030] Figure 3 This is a structural schematic diagram of the third setting method of the flexible strip in this utility model.

[0031] Figure 4 This is a structural schematic diagram of the fourth setting method of the flexible strip in this utility model.

[0032] Figure 5 This is a cross-sectional stacked structural diagram of this utility model.

[0033] Figure 6 This is a cross-sectional structural diagram of the flexible strip.

[0034] Figure 7 This is a structural diagram of the second type of flexible strip installation.

[0035] Figure 8 This is a structural diagram of the third way to set up flexible strips.

[0036] Figure 9 This is a structural diagram of the fourth type of flexible strip installation.

[0037] Figure 10 This is a schematic diagram of the roller pressing mechanism.

[0038] Figure label:

[0039] 1. Absorbent core; 11. Absorbent reinforcement; 2. Base structure; 3. Surface structure; 4. Flexible strip; 41. Micro-protrusion; 42. Hydrophobic surface layer; 43. Reinforcing structure; 51. Upper roller; 52. Lower roller; 511. Protrusion. Detailed Implementation

[0040] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0041] refer to Figure 1 , Figure 5 , Figure 6As shown, this embodiment provides a disposable absorbent product, including an absorbent core 1, a base structure 2 for placing and supporting the absorbent core 1, and a surface structure 3 for covering or partially enclosing the absorbent core 1. The base structure 2 is connected to a portion of the surface structure 3 on both sides. Flexible strips 4 are provided on both sides of the surface structure 3 in the width direction of the absorbent core 1. The flexible strips 4 are located on the upper overlapping line of the edge in the width direction of the absorbent core 1, and the distance between the flexible strips 4 and the edge in the width direction of the absorbent core 1 is 0-10mm. The height of the flexible strips 4 is 1-10mm. The flexible strips 4 are made of foamed material with a foaming ratio of 5-100 times. Under the condition of 0.2-1 PSI, the compression deformation of the flexible strips 4 exceeds 30%, and the height resilience is greater than 50%.

[0042] The pink filling part is a flexible strip 4. In this design, the flexible strip 4 is a strip-shaped object, which is set along the length of the absorbent core 1 and is located in the middle of the absorbent core 1. Its length is about 1 / 3 to 2 / 3 of the length of the absorbent core 1. In this design, it is set to 1 / 2.

[0043] Of course, the flexible strip can also be laid across the entire longitudinal length, meaning the length of the flexible strip is roughly the same as the length of the absorbent core. To achieve better wearing comfort, the ends of the flexible strip can be deformed along its length, breaking the foam structure to create a flattened shape that no longer springs back. For example, a 3mm high flexible strip, flattened by 90%, will have a final height of 0.3mm, resulting in a flexible strip with a 3mm height in the middle and 0.3mm height at both ends. The length of the 3mm height in the middle can be set according to actual needs, such as half the length of the absorbent core. Figure 2 As shown, the cyan-filled portion is the flattened part of the flexible strip 4, while the pink-filled portion is the normally set flexible strip 4. A compression deformation exceeding 30% ensures sufficient flexibility for the flexible strip 4; the optimal compression deformation should be around 70%, ensuring both sufficient flexibility and adequate three-dimensional leak-proofness. A height rebound rate greater than 50% ensures sufficient leak-proof height for the flexible strip without further deformation; the optimal height rebound rate is around 70%.

[0044] Since the two ends of the flexible strip 4 are mainly located at the buttocks and hips, which are usually in close contact with the body, if the height of the flexible strip is too high, it will cause discomfort. Laying the flexible strip across the entire longitudinal length facilitates a simpler process and increases production efficiency.

[0045] The height of the flexible strip is usually chosen to be 2-5mm, with 3mm being the best choice, which allows for more comfortable wear. In extreme cases, such as when used for postpartum women or newborns, the height can be increased appropriately, up to a maximum of 10mm, to more effectively prevent leakage.

[0046] The surface layer structure 3 may include a surface nonwoven fabric, a conductive layer, a three-dimensional protective enclosure, etc.; the base structure 2 may include multiple structures such as a small wrapping film, a back release paper, a bottom film, and wing paper. Both the surface layer structure 3 and the base structure 2 can be selected according to actual needs. The specific structure of the absorbent core 1 can also be selected according to actual needs, and it can also be grooved, embossed, etc., as needed.

[0047] like Figure 5 As shown, its surface structure includes a three-dimensional protective barrier and a drainage layer, and its base structure includes a back release paper, a bottom film, and wing paper, with the flexible strip 4 disposed on the three-dimensional protective barrier. Alternatively, the flexible strip 4 can also be disposed within the absorbent core in the lamination direction, such as... Figure 5 The red filler position is shown in the diagram; the flexible strip 4 can also be positioned between the absorbent core and the surface layer structure in the stacking direction, such as... Figure 5 The pink filler area is shown in the diagram.

[0048] refer to Figure 2 As shown, the flexible strip 4 is located above the outer edge of the width direction of the absorbent core 1. The pink filling portion is the flexible strip 4.

[0049] refer to Figure 3 As shown, the flexible strip 4 is located above the inner side of the edge in the width direction of the absorbent core 1. The pink filling portion is the flexible strip 4.

[0050] In disposable absorbent products, the absorbent core 1 is the core component for absorbing liquids. However, during actual use, due to user activities such as walking, sitting, and turning over, the absorbent core 1 is prone to displacement and deformation, leading to a decrease in absorption efficiency and problems such as side leakage. This solution involves installing flexible strips 4 on both sides inside the surface layer structure 3, along the width direction of the absorbent core 1. The placement of these strips can be varied: when located on the upper outer edge of the absorbent core 1's width direction, they act like a "guardrail," preventing the absorbent core 1 from shifting outwards; when located on the upper inner edge, they provide some constraint to the absorbent core 1 from the inside; and when located on the upper overlapping line, they allow for more precise positioning of the absorbent core 1's edge.

[0051] The distance between the flexible strip 4 and the edge of the absorbent core 1 in the width direction is set to 0-10mm. This means the flexible strip can be 0, 3, 5, 8, or 10mm away from the edge of the absorbent core 1. This distance can be on the outside or inside of the absorbent core. When the distance is 0mm, the flexible strip 4 directly fits against the edge of the absorbent core 1, providing more direct support and positioning. A certain distance provides a buffer space for the absorbent core 1 when it deforms under pressure, without affecting its overall support function. The flexible strip 4, with a height of 1-10mm, ensures effective support for the absorbent core 1 without causing the user a noticeable foreign body sensation due to excessive height.

[0052] The flexible strip 4 is made of foam material with a foaming ratio of 5-100 times. Within this range, the flexible strip 4 possesses good flexibility and elasticity. In this design, the foaming ratio is selected to be around 30 times. Under a pressure of 0.2-1 PSI, the compression deformation exceeds 30%, and the height rebound rate is greater than 50%. Preferably, under a pressure of 0.2-0.5 PSI, the height deformation does not exceed 50%, and the height rebound rate is greater than 75%. For example, under a pressure of 0.3 PSI, the height deformation is 40%, and the height rebound rate is 80%. Here, the height deformation refers to the compression in the diameter direction, and the height rebound rate refers to the amount of material that rebounds after compression in the diameter direction. This means that the flexible strip 4 will not deform excessively and lose its supporting function under normal use pressure, and it can quickly return to its original shape after the pressure is released, continuously providing stable support for the absorbent core 1. It can be used normally after the packaging is unpacked.

[0053] The flexible strip 4 has a circular, elliptical, or polygonal cross-sectional shape, and can also be other shapes, such as irregular shapes. Designing the flexible strip 4 as circular or elliptical is based on ergonomics and user comfort considerations. A circular cross-section is isotropic, meaning that the force applied is relatively uniform regardless of the direction of the force. When using disposable absorbent products, the user's body movements cause the absorbent product to be compressed and stretched in different directions. The circular cross-section of the flexible strip 4 can better adapt to these changes, always providing stable support for the absorbent core 1 and preventing its displacement and deformation. An elliptical cross-section allows for adjustment of the ratio of the major and minor axes according to actual needs. For example, when a closer fit to the curve of a certain part of the body is required, the ratio of the major and minor axes can be appropriately increased, allowing the flexible strip 4 to better conform to the body and absorbent core 1, improving support while reducing local pressure on the skin, further enhancing user comfort.

[0054] The surface of the flexible strip 4 is provided with a hydrophobic surface layer 42. The hydrophobic surface layer 42 can also be replaced with a hydrophobic coating. This is mainly to address the impact of liquid penetration on the performance of the flexible strip 4. During the use of disposable absorbent products, the liquid absorbed by the absorbent core 1 may come into contact with the flexible strip 4. If the flexible strip 4 absorbs water, it will soften and lose its elasticity, thus failing to provide stable support and positioning for the absorbent core 1. The hydrophobic coating or hydrophobic surface layer 42 has good waterproof performance, effectively preventing liquid from penetrating into the interior of the flexible strip 4, keeping the flexible strip 4 dry and elastic. A dry flexible strip 4 can always maintain good support, ensuring that the absorbent core 1 will not shift or deform during use. At the same time, the hydrophobic surface can also reduce liquid residue on the surface of the flexible strip 4, reduce the risk of bacterial growth, maintain the hygienic performance of the disposable absorbent product, and extend its service life.

[0055] A reinforcing structure 43 is provided at the center of the flexible strip 4. The reinforcing structure 43 is a flexible fiber bundle or flexible fiber strip extending along the length of the flexible strip 4. The material can be polyester fiber, nylon fiber, etc., and the diameter of the fiber bundle or fiber strip is 0.01-0.2mm. During the use of disposable absorbent products, the flexible strip 4 may be subjected to significant pressure or tension. For example, when the user sits down or stands up, the absorbent product will be squeezed and stretched. If the strength of the flexible strip 4 is insufficient, it is prone to breakage or excessive deformation, thus losing its support for the absorbent core 1. The diameter of the flexible fiber bundle or flexible fiber strip is set at 0.01-0.2mm. This small diameter will not affect the overall softness and elasticity of the flexible strip 4, so that the user will not feel a significant foreign body sensation during use. At the same time, the flexible fiber bundle or fiber strip can be evenly distributed inside the flexible strip 4, strengthening its internal structure. When subjected to external force, it can disperse stress, prevent the flexible strip 4 from local breakage or deformation, and ensure that it can always provide stable support for the absorbent core 1.

[0056] When the flexible strip 4 is located on the upper outer side of the absorbent core 1 in the width direction, absorption reinforcement parts 11 are provided on both sides of the absorbent core 1 in the width direction. When the flexible strip 4 is located on the upper inner side of the absorbent core 1, absorption reinforcement parts 11 are provided on the absorbent core 1 at the side where the two PE round strips are close to each other. Providing absorption reinforcement parts 11 at corresponding positions on the absorbent core 1 when the flexible strip 4 is in different positions is to further improve the absorption efficiency and leak-proof performance of disposable absorbent products. If the flexible strip 4 is located on the upper outer side of the absorbent core 1 in the width direction, it means that the absorbent core 1 may be more susceptible to liquid impact or side leakage on the outer side. In this case, providing absorption reinforcement parts 11 on both sides of the absorbent core 1 in the width direction can increase the liquid absorption capacity of the absorbent core 1 on the outer side, quickly absorb and lock in the liquid, and prevent side leakage. When the flexible strip 4 is located on the upper inner side of the absorbent core 1, the side where the two flexible strips 4 are close to each other may become an area where liquid easily accumulates. Providing absorption reinforcement parts 11 can enhance the absorption capacity of this part, allowing the liquid to be distributed more evenly in the absorbent core 1, improving the overall absorption efficiency. The absorption enhancement section 11 can be achieved by increasing the content of superabsorbent polymer (SAP) and optimizing the structure of the absorption core 1 to improve its ability to absorb and lock in liquids. The SAP can be added by targeted application. The width, absorption capacity, and length of the absorption enhancement section 11 can be set according to actual needs, such as being twice the width and 1.1 times the length of the flexible strip, with an absorption capacity 1.3-1.8 times the average absorption capacity of the absorption core 1.

[0057] like Figure 1 , Figure 2 , Figure 3 The blue parts in the figure represent the positions of the absorption reinforcement part 11 in the absorption core 1 when the flexible strip 4 is set in different positions.

[0058] The flexible strip 4 is made of at least one of PU foam, PE foam, or EVA foam.

[0059] PU foam materials have excellent wear resistance and chemical corrosion resistance, and can maintain their performance stability during long-term use. They are not easily worn or damaged, and have good resistance to common chemicals, making them suitable for use in various environments.

[0060] PE foam material is lightweight, soft, and low-cost, with good cushioning and thermal insulation properties. Its lightweight nature makes disposable absorbent products more portable, reducing the burden on users; its softness improves comfort and reduces skin irritation; and its low cost helps lower production costs and enhances market competitiveness.

[0061] EVA foam material possesses excellent cushioning properties and is environmentally friendly. Its cushioning properties effectively absorb and disperse external forces, protecting the absorbent core and the user's skin; its environmental friendliness meets modern society's requirements for product environmental protection, reducing pollution. Depending on different usage needs and cost considerations, suitable foam materials can be selected or used in combination. For example, combining PU foam material and EVA foam material can ensure the product's wear resistance and cushioning performance while also taking into account environmental protection and cost factors.

[0062] The flexible strips 4 are continuously or intermittently arranged along the width of the absorbent core 1. When intermittently arranged, the spacing between two adjacent flexible strips 4 is 2-10mm. The continuous or intermittent arrangement of the flexible strips 4 along the width of the absorbent core 1 each has its unique advantages. Continuously arranged flexible strips 4 provide continuous, uninterrupted support for the absorbent core 1, ensuring that the absorbent core 1 maintains a good shape and position throughout its width. This arrangement is suitable for situations with high leak-proof requirements and limited user movement, such as diapers or sanitary napkins used at night, maximizing the prevention of displacement and deformation of the absorbent core 1 and reducing side leakage.

[0063] The intermittently arranged flexible strips 4 have a gap between adjacent segments, with the gap set at 2-10mm. This design, while ensuring basic support for the absorbent core 1, has the following advantages: firstly, it saves material costs and reduces product production costs; secondly, it makes disposable absorbent products more flexible when bending and folding, improving ease of use. For example, when the user engages in vigorous activity, the intermittently arranged flexible strips 4 can better adapt to the deformation of the absorbent product, reducing skin discomfort caused by rigid support.

[0064] refer to Figure 4 As shown, this is a relatively extreme state, in which the flexible strip 4 is formed by a combination of multiple spaced flexible points, and each flexible point can be of a different shape.

[0065] See again Figure 7 As shown, the surface of the flexible strip 4 is provided with a plurality of evenly distributed micro-protrusions 41, the height of which is 0.1-0.5 mm. These evenly distributed micro-protrusions 41 serve multiple functions. From a structural connection perspective, the micro-protrusions 41 increase the friction between the flexible strip 4 and the surface layer structure 3. During the use of the disposable absorbent product, the surface layer structure 3 will move to some extent with body movement. The micro-protrusions 41 enable the flexible strip 4 and the surface layer structure 3 to better engage, preventing relative sliding between them and ensuring that the flexible strip 4 remains in the correct position, providing stable support and positioning for the absorbent core 1.

[0066] Again Figure 8 , Figure 9 As shown, the cross-section of the flexible strip 4 is not uniform. This design is to better adapt to the complex shape of the human body and the stress differences of the absorbent core 1 in different parts. The buttocks, perineum, and other areas of the human body have irregular shapes, and the pressure on the absorbent core 1 in these areas is also uneven. The uneven cross-section design allows the flexible strip 4 to provide stronger support in areas of higher stress, while remaining relatively soft in areas of lower stress. This effectively prevents the absorbent core 1 from shifting and avoids pressure on the skin due to excessive local support. For example, in areas where the absorbent core 1 is in close contact with the body and is easily compressed, the cross-section of the flexible strip 4 can be designed to be relatively thick to provide stronger support; while at the edges or in areas of lower stress, the cross-section can be thinner to increase softness and make the user feel more comfortable.

[0067] The disposable absorbent products are sanitary napkins, diapers, or panty liners.

[0068] This disposable absorbent product is designed in various forms, such as sanitary napkins, diapers, or panty liners, to meet the needs of different groups and usage scenarios. This solution primarily uses sanitary napkins as an example. Sanitary napkins are mainly used by women during menstruation, when they need to absorb menstrual blood. Therefore, the design of sanitary napkins needs to focus on absorbency, leak-proof performance, and comfort. The flexible strip 4 in this solution effectively prevents the absorbent core 1 from shifting and deforming, improving absorbency and leak-proof performance. At the same time, its good elasticity and comfort design meet the needs of women during menstruation.

[0069] The absorption reinforcement part 11, micro protrusions 41, hydrophobic surface layer 42, and reinforcement structure 43 mentioned above can be omitted or selectively provided according to actual needs.

[0070] A molding process for a disposable absorbent product, characterized by comprising the following steps:

[0071] S1. Prepare the substrate structure 2 to support the absorber core 1 and the surface layer;

[0072] S2. Prepare absorbent core 1 for liquid absorption;

[0073] S3. The absorbent core 1 is bonded to the substrate structure 2 by adhesive bonding to form a semi-finished product;

[0074] S4. Prepare a flexible strip 4, the height of which is 1-10mm. The flexible strip 4 is made of foamed material with a foaming ratio of 5-100 times. Under the condition of 0.2-1PSI, the compression deformation of the flexible strip 4 exceeds 30%, and the height resilience is greater than 50%. The cross-sectional shape of the flexible strip 4 is circular, elliptical, or polygonal. The material of the flexible strip 4 is at least one of PU foamed material, PE foamed material, or EVA foamed material.

[0075] S5. The flexible strip 4 is incorporated into the surface layer structure 3, with the two flexible strips 4 located on both sides of the surface layer structure 3 respectively.

[0076] S6, the surface structure 3 is composited onto the semi-finished product, and the flexible strip 4 is located in the width direction of the absorbent core 1, and the distance between the flexible strip 4 and the edge of the absorbent core 1 in the width direction is 0-10mm.

[0077] S7, Pre-compression deformation of flexible strip 4, including:

[0078] S71. Under the preset first pressure value, pressure is applied to the flexible strip 4 to cause the flexible strip 4 to undergo the first deformation, and the deformation method is roller pressing.

[0079] S72. After the first deformation, a pressure plate is used to apply pressure and hold the material in place for the first time. The length of the pressure plate is 3-10 times the length of the flexible strip 4.

[0080] S73. After an interval of 1-3 seconds, perform a second deformation and a second pressure hold.

[0081] In S5, the flexible strip 4 can be incorporated into the three-dimensional enclosure, such as... Figure 5 As shown. Alternatively, the flexible strip 4 can also be disposed at the upper end of the absorbent core 1 or the lower end of the surface layer structure. Furthermore, the flexible strip 4 can also be disposed within the covering layer of the absorbent core 1, that is, the flexible strip 4 is directly composited into the absorbent core 1 in step S2.

[0082] The pre-deformation pressure, the height at which the pressure is maintained, and the time interval mentioned above can all be selected according to actual needs.

[0083] The flexible strip 4 undergoes a specific pre-compression deformation process, allowing it to better conform to the body's curves. It is precisely positioned along the width of the absorbent core 1 and has a reasonable distance from the edge, effectively reducing displacement of the absorbent product due to body movement during use. This prevents excessive friction or pressure on the skin, providing a more comfortable and relaxed wearing experience. After pre-compression deformation within the surface structure 3, the flexible strip 4 forms a stable three-dimensional structure. Its height, shape, and position are precisely controlled, creating an effective leak-proof barrier around the absorbent core 1. This effectively prevents side leakage, ensuring the user's body remains dry. The multi-step pre-compression deformation process gives the flexible strip 4 a certain degree of flexibility and plasticity.

[0084] The combination of roller pressing and pressure plate holding can increase production speed while ensuring deformation quality. Roller pressing enables continuous deformation, while pressure plate holding can quickly stabilize the deformation state of the flexible strip 4, thereby improving the overall production line efficiency.

[0085] To achieve process continuity, the flexible strip 4 can be set to a continuous length. Combined with the continuous length of the surface layer structure 3 and the base structure 2, a continuous conveying process can be formed, effectively improving work efficiency. Once completed, only circumferential cutting is needed to obtain a standard product. However, since the flexible strip 4 has a complete longitudinal length, if the overall protrusion height of the flexible strip 4 is too high, it will affect wearing comfort. Therefore, it is necessary to deform both ends of the flexible strip 4 to reduce its height, thereby improving comfort.

[0086] Therefore, a deformation step is added to both ends of the flexible strip 4. This step can be performed using a separate rolling mechanism, or it can utilize the rolling process in step S71, simply by increasing the diameter of some of the pressure application areas in the pressure roller. Figure 10 As shown, this is a roller pressing mechanism for pre-compressing and deforming both ends of the flexible strip 4. It includes an upper roller 51 and a lower roller 52. The upper roller 51 is provided with a protrusion 511, which is used to achieve destructive deformation at both ends of the flexible strip 4, while the remaining part is used to achieve pre-deformation of the middle part of the flexible strip 4. Of course, this roller pressing mechanism is matched with the length of the flexible strip 4. One upper roller 51 can completely press two flexible strips, or multiple protrusions 511 can be provided to achieve periodic destructive deformation and pre-deformation.

[0087] Of course, step S7 can also be omitted. If the length of the flexible strip 4 is set according to actual needs, that is, to achieve a better length for preventing side leakage, the deformation steps at both ends of the flexible strip 4 can also be omitted.

[0088] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A disposable absorbent product, comprising an absorbent core, a base structure for placing and supporting the absorbent core, and a surface layer structure for covering or partially enclosing the absorbent core, wherein both sides of the base structure are respectively connected to portions of the surface layer structure, characterized in that: Flexible strips are provided on both sides inside the surface layer structure and on the width direction of the absorbent core or on both sides of the upper end of the absorbent core. The flexible strips are located on the upper outer side, upper inner side, or upper overlapping line of the edge of the absorbent core in the width direction, and the distance between the flexible strips and the edge of the absorbent core in the width direction is 0-10mm. The height of the flexible strips is 1-10mm. The flexible strips are made of foamed material with a foaming ratio of 5-100 times. Under the condition of 0.2-1PSI, the compression deformation of the flexible strips exceeds 30%, and the height resilience is greater than 50%.

2. The disposable absorbent product according to claim 1, characterized in that: The cross-sectional shape of the flexible strip is circular, elliptical, or polygonal.

3. The disposable absorbent product according to claim 1, characterized in that: The flexible strip is made of PU foam, PE foam, or EVA foam.

4. The disposable absorbent product according to claim 1, characterized in that: The cross-section of the flexible strip is not uniform.

5. A disposable absorbent product according to claim 1, characterized in that: The surface of the flexible strip is provided with a number of evenly distributed micro-protrusions, the height of which is 0.1-0.5mm.

6. The disposable absorbent product according to claim 1, characterized in that: The flexible strips are arranged continuously or intermittently along the width direction of the absorbent core. When they are intermittently arranged, the spacing between two adjacent flexible strips is 2-10mm.

7. The disposable absorbent product according to claim 1, characterized in that: The surface of the flexible strip is provided with a hydrophobic coating or a hydrophobic surface layer.

8. A disposable absorbent product according to claim 1, characterized in that: A reinforcing structure is provided at the center of the flexible strip. The reinforcing structure is a flexible fiber bundle or flexible fiber strip extending along the length of the flexible strip, and the diameter of the fiber bundle or fiber strip is 0.01-0.2 mm.

9. A disposable absorbent product according to claim 1, characterized in that: When the flexible strip is located on the upper outer side of the absorbent core in the width direction, absorbent reinforcement parts are provided on both sides of the absorbent core in the width direction. When the flexible strip is located on the upper inner side of the absorbent core, absorbent reinforcement parts are provided on the absorbent core on the side where the two PE round strips are close to each other.

10. A disposable absorbent product according to claim 1, characterized in that: The disposable absorbent products are sanitary napkins, diapers, or panty liners.

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