Ultrathin instant-absorption water-locking core body
By employing a multi-layer material design with a densely perforated membrane surface and an ultra-thin polymer layer, the problem of liquid displacement and moisture accumulation in sanitary napkins after absorption is solved, achieving efficient absorption and water-locking functions, and improving the safety and comfort of using sanitary napkins.
Patent Information
- Application Number
- CN202520228746.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-02-13
AI Technical Summary
The core structure of existing sanitary napkins makes it easy for liquid to shift when the user moves or changes posture after absorption, resulting in side leakage. In addition, internal heat and moisture are difficult to dissipate, affecting the comfort of use.
The structure is designed with a densely perforated membrane surface, an ultra-thin polymer layer, and a multi-layer material hot-pressed together, including polypropylene, microfiber, polyethylene, and non-woven fabric. Combined with an exhaust hole design, it enhances air circulation and liquid conduction capacity, and achieves efficient absorption and water retention through starch graft copolymers and polyurethane.
It improves the air circulation of sanitary napkins, reduces the risk of side leakage, enhances safety and comfort, keeps the skin dry, and improves absorption and moisture retention.
Smart Images
Figure CN223810693U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to female sanitary product technical field, concretely is super thin instantaneous water locking core body. BACKGROUND
[0002] The sanitary product female period's intimate companion has multiple material quality optional, soft skin, relies on strong absorption and various design, can steadyly catch the menstrual blood, is daily travel, work study whole process escort, and the sanitary product includes sanitary towel, sanitary tampon, sanitary pad, menstrual cup etc.
[0003] The inventor finds that the prior art has the following problems in the process of realizing the utility model: 1, sanitary napkin is for pursuing high absorption quantity and increases the thickness of core body, and the thick core body material is accumulated, which reduces the air circulation space, simultaneously, increases the path length of menstrual blood absorption, makes the diffusion speed of liquid in the core body slow, and the heat and moisture generated by the body are easily accumulated in the core body, cannot be discharged in time, and the core body of the sanitary napkin often uses fluff pulp, which is a kind of wood pulp or straw pulp fiber, the structure is relatively close, the pore between fibers is small, and the air circulation is poor, after absorbing menstrual blood, fluff pulp will swell, further block the originally few pores, so that the moisture is difficult to dissipate, leading to the user feels hot and uncomfortable;2, after liquid absorption, when the user's body moves or posture changes, menstrual blood is easily displaced under the action of gravity or pressure generated by body action, seeps from the edge of sanitary napkin, leading to side leakage, for example, in the process of daily walking, going up and down stairs, sitting or getting up, the stability of menstrual blood cannot be maintained, the risk of side leakage is increased, which brings inconvenience and embarrassment to the user. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing super thin instantaneous water locking core body to solve the problem that liquid absorption is carried out in the background art, when the user's body moves or posture changes, menstrual blood is easily displaced under the action of gravity or pressure generated by body action, seeps from the edge of sanitary napkin, leading to side leakage. To achieve the above-mentioned purpose, the utility model provides the following technical scheme: super thin instantaneous water locking core body, including dense punching film surface layer, the dense punching film surface layer is heat-pressed with super thin high molecular layer below,
[0005] The dense punching film surface layer is provided with polypropylene below, the polypropylene is provided with superfine fiber below, the superfine fiber is provided with polyethylene below, and the polyethylene is provided with non-woven fabric below;
[0006] The super thin high molecular layer is provided with starch graft copolymer below, and the starch graft copolymer is provided with polyurethane below.
[0007] Further preferably, the dense punching film surface layer is composed of polypropylene, superfine fiber, polyethylene and non-woven fabric, and the upper and bottom are both non-woven fabric, and the whole is connected by hot pressing.
[0008] Further preferably, the ultra-thin polymer layer is composed of polyurethane and starch graft copolymer, and the upper and lower of the starch graft copolymer are composed of polyurethane, and the whole is connected by hot pressing.
[0009] Further preferably, the dense punching film surface layer is composed of polypropylene, superfine fiber, polyethylene and non-woven fabric, and the upper and bottom are both non-woven fabric, and the whole is connected by hot pressing.
[0010] Further preferably, the whole thickness of the dense punching film surface layer is 0.3mm, and the whole thickness of the ultra-thin polymer layer is 3mm.
[0011] Further preferably, the external structure size of the dense punching film surface layer is consistent with the external structure size of the ultra-thin polymer layer.
[0012] Further preferably, the external shape of the dense punching film surface layer and the ultra-thin polymer layer is arc type on both sides and corrugated type in front and back.
[0013] Compared with the prior art, the present application has the following beneficial effects:
[0014] In the present application, the sanitary napkin adopts a dense punching film surface layer, air can enter through the air exhaust holes with a diameter of 0.5mm on the surface layer, and the air circulation channel is increased. In addition, the surface layer is composed of polypropylene, superfine fiber, polyethylene and two layers of non-woven fabric, and the structure design is helpful for preliminary flow guiding and liquid dispersion, so as to avoid local blockage caused by liquid concentration and affect air permeability, effectively improve the air circulation inside the sanitary napkin, make the moisture more easily discharged, and reduce the stuffiness and discomfort of the user.
[0015] In the present application, the sanitary napkin is provided with an ultra-thin polymer layer, which is composed of polyurethane wrapping starch graft copolymer. This structure can efficiently absorb liquid and lock it firmly, realize instantaneous absorption and water locking function, even if the user's body posture changes in daily activities, the efficiently locked menstrual blood is difficult to displace, thereby greatly reducing the risk of side leakage and improving the safety and comfort of use. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a front view structure schematic diagram of the present application;
[0017] Figure 2 It is a side view structure schematic diagram of the present application;
[0018] Figure 3 It is a dense punching film surface layer internal structure schematic diagram of the present application;
[0019] Figure 4 The utility model discloses an internal structure diagram of ultrathin high molecular layer.
[0020] In the drawing: 1, dense punching film surface layer;101, polypropylene;102, superfine fiber;103, polyethylene;104, non-woven fabric;2, ultrathin high molecular layer;201, starch graft copolymer;202, polyurethane. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill workers in the field without creative work belong to the scope of protection of the utility model.
[0022] Please refer to Figures 1 to 4 The utility model provides a technical scheme: ultrathin instant absorption water locking core body, including dense punching film surface layer 1, the lower heat pressure of dense punching film surface layer 1 is combined with ultrathin high molecular layer 2;
[0023] The lower of dense punching film surface layer 1 is equipped with polypropylene 101, the lower of polypropylene 101 is equipped with superfine fiber 102, the lower of superfine fiber 102 is equipped with polyethylene 103, the lower of polyethylene 103 is equipped with non-woven fabric 104;
[0024] The lower of ultrathin high molecular layer 2 is equipped with starch graft copolymer 201, the lower of starch graft copolymer 201 is equipped with polyurethane 202.
[0025] In the embodiment, as Figure 1 、 Figure 2 and Figure 3As shown, the dense punching film surface layer 1 is composed of polypropylene 101, ultra-fine fiber 102, polyethylene 103 and non-woven fabric 104, and there are non-woven fabrics 104 on the top and bottom, and the whole is connected by hot pressing; the dense punching film surface layer 1 is composed of multiple layers of materials by hot pressing, and the ultra-thin polymer layer 2 also adopts the connection mode of hot pressing, which makes the combination between each layer tight and the structure stable. This stable structure helps each layer of material to better play a synergistic role, ensuring the durability and reliability of the core. Polypropylene 101 has high strength and stiffness, which can provide a certain support structure for the core. At the same time, it has good chemical stability and will not react with the liquid to affect the absorption effect. During the liquid absorption process, polypropylene 101 helps to quickly guide the liquid to other layers of materials with absorption properties, playing a preliminary flow guiding role. The diameter of the ultra-fine fiber 102 is very small, much thinner than ordinary fibers. This makes it have a large specific surface area, which means that the contact area between the ultra-fine fiber 102 and the liquid is larger, which can more quickly absorb and absorb the liquid, thereby enhancing the absorption speed and absorption capacity of the core to the liquid. In addition, there are many small pores between the ultra-fine fibers 102, which form complex capillary channels. Under the action of capillary force, the liquid can quickly diffuse and permeate in the ultra-fine fiber 102 layer, further improving the dispersion and flow guiding ability of the core to the liquid. Polyethylene 103 is a common polymer material with good flexibility and water resistance. In the core structure, the polyethylene 103 layer can play a certain isolation and protection role to prevent liquid from leaking to other parts that do not need to absorb liquid. At the same time, the flexibility of polyethylene 103 makes the core better adapt to different shapes and surfaces during use, improving the fit of the core with the use part, thereby further enhancing the absorption and flow guiding effect of the core to the liquid. In addition, polyethylene 103 also has good chemical stability and can resist the erosion of chemicals that may exist in the liquid to some extent, ensuring the stability and durability of the core structure. The upper and lower layers of non-woven fabric 104 bring excellent skin-friendly properties to the core. Non-woven fabric 104 is usually made of natural or chemical fibers through non-woven process. Its surface is soft and smooth, and there is no obvious friction and discomfort when it comes into contact with the skin, which can provide users with a comfortable use experience. At the same time, non-woven fabric 104 also has good air permeability. Its fiber structure is loose and has many small pores, which can allow air to flow freely. This allows the core to expel moisture and heat in a timely manner during the absorption of liquid, keeping the use part dry and comfortable and effectively preventing skin problems such as eczema and miliaria caused by moisture accumulation, further improving the skin-friendliness and use safety of the core. In addition, non-woven fabric 104 also has certain waterproof performance, which can prevent liquid from seeping out of the core surface to some extent, ensuring the absorption effect and use reliability of the core.
[0026] In this embodiment, as shown in Figure 1 , Figure 2 and Figure 4 , the ultra-thin polymer layer 2 is composed of polyurethane 202 and starch graft copolymer 201, and the upper and lower parts of the starch graft copolymer 201 are composed of polyurethane 202, and the whole is connected by hot pressing synthesis; the starch graft copolymer 201 is based on starch, and other functional monomers are introduced by graft copolymerization reaction, the starch itself has a certain hydrophilicity, and can form hydrogen bond interaction with water molecules, while after graft copolymerization reaction, the introduced functional monomers endow the starch graft copolymer 201 with more hydrophilic groups and special molecular structure, these hydrophilic groups can strongly bind with water molecules, greatly improving the water absorption capacity of the material, at the same time, after absorbing a large amount of water, the starch graft copolymer 201 can form a three-dimensional network structure, tightly binding the water molecules inside the network, thereby realizing efficient water locking function, this three-dimensional network structure not only can prevent the absorbed water from easily flowing away under the action of external pressure or gravity, but also can adjust the release speed of water to a certain extent, so that the material can maintain good water absorption and water locking performance for a long time, the polyurethane 202 is a high polymer material with excellent flexibility, its molecular structure contains soft segment and hard segment, the soft segment is usually composed of flexible chain segments such as polyester or polyether, which endows the polyurethane 202 with good flexibility, elasticity and low temperature performance; the hard segment is composed of rigid chain segments generated by the reaction of diisocyanate and chain extender, which provides the polyurethane 202 with certain strength, hardness and wear resistance, this soft and hard segment alternating molecular structure makes the polyurethane 202 not only maintain good flexibility, but also has certain mechanical properties, in the ultra-thin instant absorption and water locking core, the polyurethane 202 layer is located above and below the starch graft copolymer 201, which can provide the whole ultra-thin polymer layer 2 with good flexibility and adaptability, in the use process, the core needs to adapt to different shapes and surfaces, the flexibility of the polyurethane 202 makes the ultra-thin polymer layer 2 better fit the use site, improving the contact area and tightness between the core and the use site, thereby further enhancing the water absorption and water locking effect of the core, at the same time, the polyurethane 202 also has good chemical stability and water resistance, which can resist the erosion of possible chemical substances in the liquid to a certain extent, ensuring the stability and durability of the structure of the ultra-thin polymer layer 2.
[0027] In this embodiment, as shown in Figure 1 and Figure 2 , a plurality of exhaust holes are provided on the upper surface of the dense punched film surface layer 1, and the hole diameter is 0.5 mm; the plurality of exhaust holes provided on the dense punched film surface layer 1 can effectively exhaust the moisture and heat, keep the use environment dry and comfortable, and avoid the discomfort caused by moisture accumulation, especially suitable for the field of sanitary products with high air permeability requirements.
[0028] In this embodiment, as shown in Figure 1 and Figure 2 , the overall thickness of the dense punched film surface layer 1 is 0.3 mm, and the overall thickness of the ultra-thin polymer layer 2 is 3 mm; the dense punched film surface layer 1 is only 0.3 mm thick, and the ultra-thin polymer layer 2 is 3 mm thick, and the overall core thickness is thin. This ultra-thin design makes the product carrying the core lighter and thinner, while ensuring the liquid absorption and water locking function, and improving the comfort and fit of the product. For example, in sanitary products, users can feel more light and less heavy.
[0029] In this embodiment, as shown in Figure 1 and Figure 2 , the external structure size of the dense punched film surface layer 1 is consistent with the external structure size of the ultra-thin polymer layer 2; the external structure size of the dense punched film surface layer 1 and the ultra-thin polymer layer 2 is consistent, which ensures that the two layers can be precisely fitted, further enhances the stability and functionality of the core as a whole, and avoids the problem of not being tightly fitted or having gaps due to size differences, which affects the liquid absorption and water locking effect.
[0030] In this embodiment, as shown in Figure 1 and Figure 2 , the external shape of the dense punched film surface layer 1 and the ultra-thin polymer layer 2 is arc-shaped on both sides and corrugated in front and back; the arc-shaped design on both sides and the corrugated design in front and back, on the one hand, can better fit the human body curve in sanitary products, improving the leakage prevention performance, and on the other hand, in other application scenarios, this shape design may be beneficial to the installation, fixation of the product, or adapt to specific space structures, improving the applicability of the product.
[0031] The use method and advantages of the present application are as follows:
[0032] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , first, the exhaust hole with a diameter of 0.5 mm on the dense punched film surface layer 1 enters the dense punched film surface layer 1 composed of polypropylene 101, ultra-fine fiber 102, polyethylene 103 and upper and lower layers of non-woven fabric 104, which can preliminarily guide and disperse the liquid. Then, the liquid penetrates through the heat-pressed interface and enters the lower ultra-thin polymer layer 2, and the structure composed of upper and lower polyurethane 202 wrapping starch graft copolymer 201 in the ultra-thin polymer layer 2 can efficiently absorb and lock the liquid, thereby realizing the function of instant absorption and water locking.
[0033] The basic principle, main features and advantages of the present application are shown and described above. The technical personnel in the industry should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. An ultra-thin instant lock water core body comprising a dense punched film surface layer (1), characterized in that: The dense punching film surface layer (1) is hot-pressed with an ultra-thin polymer layer (2) below; The dense punching film surface layer (1) is provided with polypropylene (101) below, the polypropylene (101) is provided with ultra-fine fiber (102) below, the ultra-fine fiber (102) is provided with polyethylene (103) below, and the polyethylene (103) is provided with non-woven fabric (104) below. The ultra-thin polymer layer (2) is provided with starch graft copolymer (201) below, and the starch graft copolymer (201) is provided with polyurethane (202) below.
2. The ultra-thin instant-suck lock water core body according to claim 1, characterized in that: The dense punching film surface layer (1) is composed of polypropylene (101), ultra-fine fiber (102), polyethylene (103) and non-woven fabric (104), and both the top and the bottom are provided with non-woven fabric (104), and the whole is connected by hot pressing.
3. The ultra-thin instant-suck lock water core body according to claim 1, characterized in that: The ultra-thin polymer layer (2) is composed of polyurethane (202) and starch graft copolymer (201), and the top and bottom of the starch graft copolymer (201) are respectively composed of polyurethane (202), and the whole is connected by hot pressing.
4. The ultra-thin instant lock water core according to claim 1, wherein: The dense punching film surface layer (1) is provided with a plurality of exhaust holes on the top, and the hole groove diameter is 0.5mm.
5. The ultra-thin instant lock water core according to claim 1, wherein: The overall thickness of the dense punching film surface layer (1) is 0.3mm, and the overall thickness of the ultra-thin polymer layer (2) is 3mm.
6. The ultra-thin instant lock water core according to claim 1, wherein: The external structure size of the dense punching film surface layer (1) is consistent with the external structure size of the ultra-thin polymer layer (2).
7. The ultra-thin instant lock water core according to claim 1, wherein: The external shape of the dense punching film surface layer (1) and the ultra-thin polymer layer (2) is circular arc type on both sides and corrugated type in front and back.