Core for sanitary napkin, preparation method of core and sanitary napkin

Abstract

The embodiment of the invention provides a core body for a sanitary napkin, a preparation method of the core body and the sanitary napkin, and relates to the field of articles of daily use. A plurality of first cutting grooves and a plurality of second cutting grooves are formed in one face of the core body. The second cutting grooves are located in the middle of the core body, and the first cutting grooves are located in the non-middle portion of the core body. Each first cutting groove and each second cutting groove do not completely penetrate through the core body, and the depth of each second cutting groove is larger than that of each first cutting groove. The sanitary towel comprises a bottom film, a core body and a surface layer which are sequentially arranged, and the structure of the core body is described above. According to the core body for the sanitary napkin and the sanitary napkin, by designing the core body of a special structure, the problem of material leakage in the processing process can be solved, and meanwhile the sanitary napkin has the good use comfort level.

Description

Technical Field

[0001] The present invention relates to the technical field of daily necessities, and in particular to a core body for a sanitary napkin, a preparation method thereof, and a sanitary napkin. Background Art

[0002] The structure of a traditional sanitary napkin generally includes a surface layer, a core and a bottom film stacked in sequence from top to bottom. The core in the middle is mainly responsible for absorbing menstrual blood. At present, the core structure generally loads SAP resin particles on the substrate to absorb menstrual blood by utilizing the water absorption of the resin particles, or wet absorbent paper is directly used as the core or compounded in the core. Although the above core structure has a better liquid absorption effect, it is relatively hard and is not comfortable when used in sanitary napkins.

[0003] In response to the above problems, there is currently a technology that uses a cutting groove that penetrates the core to improve the softness of the core. The cutting groove also has the advantages of accelerating the absorption speed and accelerating the diffusion of menstrual blood. However, since most existing cores are loaded with SAP resin particles, this method has the problem of leakage of SAP resin particles. Or, even if the material of the core is wet absorbent paper, there is a problem of leakage of paper scraps after the wet absorbent paper is cut, which will cause inconvenience in subsequent processing; the leaked SAP resin particles or paper scraps may adhere to the surface of the core or other positions, and may also cause the comfort of the sanitary napkin to decrease.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention includes providing a core for a sanitary napkin, a method for preparing the same, and a sanitary napkin, aiming to improve at least one of the problems mentioned in the background technology.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, an embodiment of the present invention provides a core body for a sanitary napkin, wherein a plurality of first cutting grooves and a plurality of second cutting grooves are provided on one side of the core body;

[0008] The plurality of second cutting grooves are located in the middle part of the core body, and the plurality of first cutting grooves are located in the non-middle part of the core body;

[0009] Each of the first cutting grooves and each of the second cutting grooves does not completely penetrate the core body, and the depth of each of the second cutting grooves is greater than that of each of the first cutting grooves.

[0010] In an optional embodiment, the ratio of the groove depth of each first cutting groove to the thickness of the core body at the position where the first cutting groove is located is 1 / 4 to 2 / 4;

[0011] And / or, the ratio of the groove depth of each second cutting groove to the thickness of the core body at the position where the second cutting groove is located is 2 / 4 to 3 / 4.

[0012] In an optional embodiment, the length direction of each first cutting groove and each second cutting groove is the same as the length direction of the core body of the sanitary napkin.

[0013] In an optional embodiment, the core body includes a guide layer, a central convexity and a first wet absorbent paper which are arranged in sequence;

[0014] The guide layer and the first wet absorbent paper are connected to each other and the central convex is sandwiched between the two;

[0015] The second cutting groove is arranged at a position corresponding to the central convexity.

[0016] In an optional embodiment, the second cutting groove passes through the central projection.

[0017] In an optional embodiment, the central convexity is a liquid-absorbing structure rolled up from wet absorbent paper, or the central convexity is a liquid-absorbing structure loaded with water-absorbing resin particles.

[0018] In an optional embodiment, the core body includes a first liquid absorbent portion and a second liquid absorbent portion wrapped outside the first liquid absorbent portion;

[0019] The first liquid absorbing part is formed by rolling up the second wet absorbent paper, or the first liquid absorbing part is a liquid absorbing structure loaded with water absorbing resin particles;

[0020] The second liquid absorbing part is formed by wrapping the third wet absorbent paper outside the first liquid absorbing part;

[0021] The length and width of the second liquid absorbing part are greater than those of the first liquid absorbing part, the first liquid absorbing part is located in the middle of the second liquid absorbing part, the thickness of the core body at the position corresponding to the first liquid absorbing part is greater than the thickness at other positions, and the core body forms a central convexity at the position corresponding to the first liquid absorbing part;

[0022] The second cutting groove is arranged at a position corresponding to the central convexity.

[0023] In an optional embodiment, the core body includes a central convex portion and a core body that are sequentially arranged;

[0024] The central convex portion is arranged at the middle position of the corresponding core body;

[0025] The second cutting groove is arranged at a position corresponding to the central convexity.

[0026] In an optional embodiment, the core body includes wood pulp spunlace fabric, a liquid absorbent core and dust-free paper arranged in sequence; the liquid absorbent core is a liquid absorbent structure loaded with water-absorbent resin particles.

[0027] In an alternative embodiment, the central projection is a liquid-absorbing structure loaded with water-absorbing resin particles.

[0028] In a second aspect, an embodiment of the present invention provides a method for preparing a core body for a sanitary napkin for preparing the sanitary napkin provided in any of the above embodiments, comprising:

[0029] The core body to be cut is obtained by assembling, and a first cutting groove and a second cutting groove are formed on the core body to be cut to obtain a core body for a sanitary napkin.

[0030] In a third aspect, an embodiment of the present invention provides a method for preparing a core body for a sanitary napkin, which is used to prepare the core body for a sanitary napkin, comprising:

[0031] Providing a convex portion to be cut, and cutting the convex portion to be cut to form a lower portion of a second cutting groove;

[0032] Providing a guide layer to be cut, and cutting the guide layer to be cut to form a first cutting groove and an upper part of a second cutting groove;

[0033] Assembling the cut guide layer, the central convexity and the first wet absorbent paper to obtain a core body for a sanitary napkin;

[0034] Or, include:

[0035] Providing a convex portion to be cut, and cutting the convex portion to be cut to form a lower portion of a second cutting groove;

[0036] Assemble the guide layer to be cut, the central convex and the first wet absorbent paper;

[0037] The assembled guide layer to be cut is cut to form the first cutting groove and the upper part of the second cutting groove to obtain the core body for the sanitary napkin.

[0038] In a fourth aspect, an embodiment of the present invention provides a method for preparing a core body for a sanitary napkin, which is used to prepare the core body for a sanitary napkin, comprising:

[0039] Providing a first liquid absorbing portion to be cut, and cutting the first liquid absorbing portion to be cut to form a lower portion of a second cutting groove;

[0040] Providing a third wet absorbent paper to be cut, and cutting the third wet absorbent paper to be cut to form a first cutting groove and an upper part of a second cutting groove;

[0041] Wrapping the cut third wet absorbent paper outside the first liquid absorbing part to obtain a sanitary napkin core;

[0042] Or, include:

[0043] Providing a first liquid absorbing portion to be cut, and cutting the first liquid absorbing portion to form a lower portion of a second cutting groove;

[0044] Providing a third wet absorbent paper to be cut, and wrapping the third wet absorbent paper to be cut outside the first liquid absorbing part;

[0045] The third wet-process absorbent paper to be cut to form the wrapped part is cut to form the first cutting groove and the upper part of the second cutting groove to obtain the core body for sanitary napkin.

[0046] In a fifth aspect, an embodiment of the present invention provides a method for preparing a core body for a sanitary napkin, which is used to prepare the core body for a sanitary napkin, comprising:

[0047] Providing a convex portion to be cut, and cutting the convex portion to be cut to form an upper portion of a second cutting groove;

[0048] Providing a core body to be cut, and cutting the core body to be cut to form a first cutting groove and a lower portion of a second cutting groove;

[0049] The cut convex part and the core body are assembled into a core body for a sanitary napkin.

[0050] In a sixth aspect, an embodiment of the present invention provides a sanitary napkin, comprising a surface layer, a sanitary napkin core provided by any of the above embodiments, and a bottom film arranged in sequence;

[0051] The base film and the surface layer are connected to each other to sandwich the core body between the two, wherein the core body has a first cutting groove and a second cutting groove on one side facing the surface layer.

[0052] The core body for sanitary napkins and the preparation method thereof and the sanitary napkins provided by the embodiments of the present invention have the following beneficial effects:

[0053] The core body for sanitary napkin provided by the embodiment of the present invention can improve the softness of the core body by opening a cutting groove, and can quickly introduce the discharged menstrual blood to the bottom of the sanitary napkin 11 through the cutting groove to play a diversion effect. However, since most of the core bodies are loaded with granular water-absorbing resin or wet-method water-absorbing paper that is easy to drop, it is easy to cause the water-absorbing resin to spill or the wet-method water-absorbing paper scraps to fall out in the subsequent process after the cutting groove is opened. Therefore, in this embodiment, the cutting groove does not completely penetrate the core body to improve the material drop problem that may exist in the subsequent processing process. In addition, in the embodiment of the present invention, the depth of the cutting groove is specially set according to the different positions of the cutting groove. Considering that the menstrual blood outlet corresponds to the middle part of the core body, the amount of menstrual blood in the middle part is large, in order to achieve better diversion effect and liquid absorption effect, the cutting groove in the middle part is set to have a depth greater than the cutting groove located next to it. Therefore, the core body for sanitary napkin provided by the embodiment of the present invention has better softness and better diversion effect, and is not easy to drop material. After being assembled into a sanitary napkin, the sanitary napkin has better comfort.

[0054] Therefore, the sanitary napkin core and sanitary napkin provided in the embodiments of the present invention are specially designed from multiple dimensions such as user experience and processing convenience. There is no leakage problem during the processing, and the sanitary napkin formed by the core has better comfort in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A flat display of a sanitary napkin is provided for the first embodiment;

[0057] Figure 2 A schematic cross-sectional view of a sanitary napkin provided in accordance with the first embodiment;

[0058] Figure 3 A schematic cross-sectional view of a sanitary napkin cut longitudinally provided in the first embodiment;

[0059] Figure 4 A more specific cross-sectional schematic diagram of a sanitary napkin after being cross-cut is provided for the first embodiment;

[0060] Figure 5 is a cross-sectional schematic diagram of a liquid-absorbing structure loaded with water-absorbing resin particles;

[0061] Figure 6 A schematic cross-sectional view of a sanitary napkin provided in accordance with the second embodiment;

[0062] Figure 7 A schematic cross-sectional view of a sanitary napkin provided in accordance with the second embodiment after longitudinal cutting;

[0063] Figure 8 A schematic cross-sectional view of a first liquid-absorbing portion of a sanitary napkin provided in a second embodiment when the first liquid-absorbing portion is a liquid-absorbing structure loaded with water-absorbing resin particles after longitudinal cutting;

[0064] Fig. 9 A schematic cross-sectional view of the sanitary napkin provided in the third embodiment.

[0065] Icon: 11-sanitary napkin; 100-core; 101-first cutting groove; 102-second cutting groove; 110-guide layer; 120-middle convex; 121-upper layer of dust-free paper; 122-upper adhesive layer; 123-SAP particle layer; 124-lower adhesive layer; 125-lower layer of dust-free paper; 130-first wet absorbent paper; 140-first liquid absorbent part; 150-second liquid absorbent part; 160-core body; 161-wood pulp spunlace fabric; 162-absorbent core; 163-dust-free paper; 300-surface layer; 400-base film. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0067] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0069] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0070] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0071] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0072] The following is a detailed description of a sanitary napkin core, a preparation method thereof, and a sanitary napkin provided in an embodiment of the present invention.

[0073] First embodiment

[0074] like Figures 1 to 3 As shown, this embodiment provides a core body 100 for a sanitary napkin and a sanitary napkin 11 including the core body 100 .

[0075] A sanitary napkin 11 provided in this embodiment includes a surface layer 300, a core body 100 provided in this embodiment and a bottom film 400 arranged in sequence; the bottom film 400 and the surface layer 300 are connected to each other to sandwich the core body 100 therebetween, wherein one side of the core body 100 having the first cutting groove 101 and the second cutting groove 102 faces the surface layer 300.

[0076] A core body 100 provided in this embodiment has a plurality of first cutting grooves 101 and a plurality of second cutting grooves 102 formed on one side thereof;

[0077] The plurality of second cutting grooves 102 are located in the middle portion of the core 100 , and the plurality of first cutting grooves 101 are located in the non-middle portion of the core 100 ;

[0078] Each of the first cutting grooves 101 and each of the second cutting grooves 102 does not completely penetrate the core 100 , and the depth of each of the second cutting grooves 102 is greater than that of each of the first cutting grooves 101 .

[0079] The core 100 for sanitary napkins provided in this embodiment can improve the softness of the core 100 by providing a cutting groove, and can quickly introduce the discharged menstrual blood to the bottom of the sanitary napkin 11 through the cutting groove to play a diversion role. However, since most of the cores 100 are loaded with granular water-absorbing resin or wet-process water-absorbing paper that is easy to shed, the water-absorbing resin is easily spilled or wet-process water-absorbing paper scraps fall out in the subsequent process after the cutting groove is provided. Therefore, in this embodiment, the cutting groove does not completely penetrate the core 100 to improve the material drop problem that may exist in the subsequent processing process. In addition, in the embodiment of the present invention, the depth of the cutting groove is specially set according to the different positions of the cutting groove. Considering that the menstrual blood outlet corresponds to the middle part of the core 100, the amount of menstrual blood in the middle part is large, in order to achieve better diversion effect and liquid absorption effect, the cutting groove located in the middle is set to have a greater depth than the cutting groove located next to it.

[0080] Therefore, the core body 100 for the sanitary napkin provided in this embodiment has better softness and better flow-guiding effect, and is not easy to fall off. After being assembled into the sanitary napkin 11, the sanitary napkin 11 has better comfort.

[0081] The technical solution of the embodiment of the present invention is suitable for application to any sanitary napkin 11 product having a core 100 loaded with absorbent resin particles or including wet absorbent paper. As for the specific structure of the core 100, the prior art can be directly referred to, and the contents described later in this application can also be referred to.

[0082] In order to make the sanitary napkin 11 more comfortable after being processed from the sanitary napkin core 100 and to better avoid the problem of leakage during the production of the sanitary napkin 11, optionally, the ratio of the depth of each first cutting groove 101 to the thickness of the core 100 at the position thereof is 1 / 4 to 2 / 4; optionally, the ratio of the depth of each second cutting groove 102 to the thickness of the core 100 at the position thereof is 2 / 4 to 3 / 4.

[0083] Furthermore, if Figure 4As shown, the core 100 includes a guide layer 110, a central protrusion 120 and a first wet absorbent paper 130 arranged in sequence; the guide layer 110 and the first wet absorbent paper 130 are connected to each other with the central protrusion 120 sandwiched therebetween; and the second cutting groove 102 is opened at a position corresponding to the central protrusion 120.

[0084] The central convexity 120 is a structure with better liquid absorption capacity. After it is set in the sanitary napkin 11, the surface of the sanitary napkin 11 convexes upward to fit the female private parts, making the use experience of the sanitary napkin 11 better. Since the thickness of the central convexity 120 is thicker, if no cutting groove is set, its hardness is higher and the softness is not good. Therefore, the second cutting groove 102 is set at the position corresponding to the central convexity 120. The second cutting groove 102 has a greater depth to better improve the softness of the central convexity 120. In addition, since the thickness of the central convexity 120 is greater, the greater depth of the cutting groove set here is also more conducive to the diversion and absorption of menstrual blood.

[0085] Furthermore, in this embodiment, the central protrusion 120 is a liquid absorbing structure loaded with water absorbing resin particles.

[0086] Furthermore, if Figure 5 As shown, the liquid-absorbing structure loaded with water-absorbing resin particles includes an upper dust-free paper 121, an upper adhesive layer 122, a SAP particle layer 123, a lower adhesive layer 124 and a lower dust-free paper 125 arranged in sequence. The preparation method is: first spray a layer of hot melt adhesive on the lower dust-free paper 125, then spread SAP particles on the hot melt adhesive to form the SAP particle layer 123, then spray another layer of hot melt adhesive on the SAP particle layer 123, and finally cover the upper dust-free paper 121 on the hot melt adhesive. After the hot melt adhesive is cooled, the upper adhesive layer 122 and the lower adhesive layer 124 are formed respectively, and the liquid-absorbing structure loaded with water-absorbing resin particles is obtained.

[0087] It should be noted that in other embodiments of the present invention, the central protrusion 120 can also be a liquid-absorbing structure with a certain thickness rolled from wet absorbent paper. When the central protrusion 120 is a liquid-absorbing structure with a certain thickness rolled from wet absorbent paper, in the present invention, the cutting groove does not completely penetrate the core 100, which can well prevent the absorbent paper scraps from falling. Here, "certain thickness" refers to the thickness that can give the central protrusion 120 better water absorption. According to the different water absorption capacity of the specific wet absorbent paper, the thickness of the central protrusion 120 can be different.

[0088] More preferably, the second cutting groove 102 completely penetrates the central convexity 120 , so that the menstrual blood accumulated in the guide layer 110 can quickly enter the first wet absorbent paper 130 through the central convexity 120 to be absorbed.

[0089] Optionally, the guide layer 110 is made of dust-free paper composite non-woven fabric.

[0090] Optionally, the length direction of each first cutting groove 101 and each second cutting groove 102 is the same as the length direction of the core 100 .

[0091] This embodiment also provides a method for preparing the sanitary napkin core 100, which specifically includes the following three methods:

[0092] 1. Assemble and obtain the core body 100 to be cut, and cut the core body 100 to be cut to form a first cutting groove 101 and a second cutting groove 102 to obtain the core body 100 for sanitary napkins.

[0093] This preparation method belongs to an integrated cutting method, and has the advantage that the bottom end of the first cutting groove 101 can touch the first wet absorbent paper to further ensure the diversion effect.

[0094] 2. Providing a convex portion 120 to be cut, cutting the convex portion 120 to be cut to form the lower portion of the second cutting groove 102 (the convex portion may be penetrated or not penetrated, and it is preferred not to penetrate the convex portion to reduce leakage of water-absorbing resin particles in the convex portion);

[0095] Providing a guide layer 110 to be cut, and cutting the guide layer 110 to be cut to form upper portions of a first cutting groove 101 and a second cutting groove 102;

[0096] The cut guide layer 110 , the central convexity 120 and the first wet absorbent paper 130 are assembled to obtain the core body 100 for the sanitary napkin.

[0097] 3. Providing a protrusion 120 to be cut, and cutting the protrusion 120 to be cut to form a lower portion of the second cutting groove 102;

[0098] Assemble the guide layer 110 to be cut, the central convex 120 and the first wet absorbent paper 130;

[0099] The assembled guide layer to be cut is cut to form the upper part of the first cutting groove 101 and the second cutting groove 102 to obtain the core body 100 for the sanitary napkin.

[0100] Second embodiment

[0101] This embodiment has some technical features in common with the first embodiment, and for matters not mentioned, please refer to the second embodiment.

[0102] like Figure 6 and Figure 7As shown, the core body 100 of this embodiment includes a first liquid absorbent part 140 and a second liquid absorbent part 150 wrapped outside the first liquid absorbent part 140; the first liquid absorbent part 140 is rolled by a second wet absorbent paper, and the second liquid absorbent part 150 is formed by wrapping a third wet absorbent paper outside the first liquid absorbent part 140; the length and width of the second liquid absorbent part 150 are greater than the first liquid absorbent part 140, the first liquid absorbent part 140 is located at the middle position of the second liquid absorbent part 150, the thickness of the core body 100 corresponding to the first liquid absorbent part 140 is greater than the thickness at other positions, and the core body 100 forms a central convex at the position corresponding to the first liquid absorbent part 140; the second cutting groove 102 is opened at the position corresponding to the central convex.

[0103] In other embodiments of the present invention, Figure 8 As shown, the first liquid absorbing part 140 is a liquid absorbing structure loaded with water absorbing resin particles.

[0104] This embodiment also provides a method for preparing the sanitary napkin core 100, which specifically includes the following three methods:

[0105] 1. Assemble and obtain the core body 100 to be cut, and cut the core body 100 to be cut to form a first cutting groove 101 and a second cutting groove 102 to obtain the core body 100 for sanitary napkins.

[0106] 2. Providing a first liquid absorbing portion 140 to be cut, and cutting the first liquid absorbing portion 140 to be cut to form a lower portion of the second cutting groove 102;

[0107] Providing a third wet absorbent paper to be cut, and cutting the third wet absorbent paper to be cut to form the upper parts of the first cutting groove 101 and the second cutting groove 102;

[0108] Wrap the cut third wet absorbent paper outside the first liquid absorbent part 140 to obtain a sanitary napkin core 100;

[0109] 3. Provide a first liquid absorbing portion 140 to be cut, and cut the first liquid absorbing portion 140 to form a lower portion of the second cutting groove 102;

[0110] Providing a third wet absorbent paper to be cut, and wrapping the third wet absorbent paper to be cut outside the first liquid absorbing part 140;

[0111] The third wet-process absorbent paper to be cut is cut to form the upper parts of the first cutting groove 101 and the second cutting groove 102 to obtain the core body 100 for sanitary napkins.

[0112] Third embodiment

[0113] This embodiment has some technical features in common with the first embodiment, and for matters not mentioned, please refer to the first embodiment.

[0114] like Fig. 9As shown, the core 100 includes a central protrusion 120 and a core body 160 which are arranged in sequence; the central protrusion 120 is arranged at a middle position corresponding to the core body 160; and the second cutting groove 102 is opened at a position corresponding to the central protrusion 120.

[0115] Preferably, the second cutting groove 102 completely penetrates the central convexity 120 , so that menstrual blood can quickly pass through the central convexity 120 into the lower core body 160 .

[0116] Optionally, the core body 160 includes a wood pulp spunlace fabric 161, a liquid absorbent core 162 and dust-free paper 163 arranged in sequence; the liquid absorbent core 162 is a liquid absorbent structure loaded with water-absorbent resin particles.

[0117] Optionally, the central protrusion 120 is a liquid absorbing structure loaded with water absorbing resin particles. The specific structure of the liquid absorbing structure loaded with water absorbing resin particles refers to the contents described in the first embodiment.

[0118] It should be noted that, in other embodiments of the present invention, the central protrusion 120 may also be a liquid-absorbing structure with a certain thickness rolled from wet absorbent paper.

[0119] This embodiment also provides a method for preparing the core 100 for sanitary napkins, which specifically includes the following two methods:

[0120] 1. Assemble and obtain the core body 100 to be cut, and cut the core body 100 to be cut to form a first cutting groove 101 and a second cutting groove 102 to obtain the core body 100 for sanitary napkins.

[0121] 2. Providing a protrusion 120 to be cut, and performing a through-cutting on the protrusion 120 to be cut to form an upper portion of the second cutting groove 102;

[0122] Providing a core body 160 to be cut, and cutting the core body 160 to be cut to form a first cutting groove 101 and a lower portion of a second cutting groove 102;

[0123] The cut convex portion 120 and the core body 160 are assembled into the core body 100 for a sanitary napkin.

[0124] In summary, therefore, the sanitary napkin core 100 and sanitary napkin 11 provided in the embodiment of the present invention are specially designed for the core 100 from multiple dimensions such as user experience and ease of processing. Material leakage is not likely to occur during the processing, and the sanitary napkin 11 formed by the core 100 has better comfort in use.

[0125] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A core for a sanitary napkin, characterized in that: A plurality of first cutting grooves and a plurality of second cutting grooves are formed on one side of the core body; The plurality of second cutting grooves are located in the middle part of the core body, and the plurality of first cutting grooves are located in the non-middle part of the core body; Each of the first cutting grooves and each of the second cutting grooves does not completely penetrate the core body, and the depth of each of the second cutting grooves is greater than that of each of the first cutting grooves.

2. The core for sanitary napkin according to claim 1, characterized in that: The ratio of the depth of each first cutting groove to the thickness of the core body at the position where the first cutting groove is located is 1 / 4 to 2 / 4; and / or, the ratio of the depth of each of the second cutting grooves to the thickness of the core body at the position where the second cutting groove is located is 2 / 4 to 3 / 4; Optionally, the length direction of each of the first cutting grooves and each of the second cutting grooves is the same as the length direction of the core body of the sanitary napkin.

3. The core for sanitary napkin according to claim 1, characterized in that: The core body comprises a guide layer, a central convexity and a first wet absorbent paper which are arranged in sequence; The guide layer and the first wet absorbent paper are connected to each other, and the central convex is sandwiched between the two; The second cutting groove is opened at a position corresponding to the central convexity; Optionally, the second cutting groove runs through the central convexity; Optionally, the central convexity is a liquid-absorbing structure rolled up from wet absorbent paper, or the central convexity is a liquid-absorbing structure loaded with water-absorbing resin particles.

4. The core for sanitary napkin according to claim 1, characterized in that: The core body comprises a first liquid-absorbing portion and a second liquid-absorbing portion wrapped outside the first liquid-absorbing portion; The first liquid absorbing part is formed by rolling up a second wet absorbent paper, or the first liquid absorbing part is a liquid absorbing structure loaded with water absorbing resin particles; The second liquid absorbing part is formed by wrapping a third wet absorbent paper around the first liquid absorbing part; The length and width of the second liquid absorbing part are greater than those of the first liquid absorbing part, the first liquid absorbing part is located at the middle position of the second liquid absorbing part, the thickness of the core body at the position corresponding to the first liquid absorbing part is greater than the thickness at other positions, and the core body forms a central convexity at the position corresponding to the first liquid absorbing part; The second cutting groove is arranged at a position corresponding to the central convexity.

5. The core for sanitary napkin according to claim 1, characterized in that: The core body comprises a central convex body and a core body body which are arranged in sequence; The central convex portion is arranged at a position corresponding to the middle portion of the core body; The second cutting groove is opened at a position corresponding to the central convexity; Optionally, the core body comprises a wood pulp spunlace cloth, a liquid absorbent core and dust-free paper arranged in sequence; the liquid absorbent core is a liquid absorbent structure loaded with water-absorbent resin particles; Optionally, the central convexity is a liquid-absorbing structure loaded with water-absorbing resin particles.

6. A method for preparing a core for a sanitary napkin, characterized in that: Used to prepare the sanitary napkin according to any one of claims 1 to 5, comprising: The core body to be cut is obtained by assembling, and the first cutting groove and the second cutting groove are formed on the core body to be cut to obtain the core body for the sanitary napkin.

7. A method for preparing a core for a sanitary napkin, characterized in that: Used to prepare the core body for sanitary napkin as claimed in claim 3, comprising: Providing a convex portion to be cut, and cutting the convex portion to be cut to form a lower portion of the second cutting groove; Providing a guide layer to be cut, and cutting the guide layer to be cut to form the first cutting groove and the upper part of the second cutting groove; Assembling the cut guide layer, the central convexity and the first wet absorbent paper to obtain the sanitary napkin core; Or, include: Providing a convex portion to be cut, and cutting the convex portion to be cut to form a lower portion of the second cutting groove; Assembling the guide layer to be cut, the central convexity and the first wet absorbent paper; The assembled guide layer to be cut is cut to form the first cutting groove and the upper part of the second cutting groove, so as to obtain the core body for the sanitary napkin.

8. A method for preparing a core for a sanitary napkin, characterized in that: Used to prepare the core body for sanitary napkin as claimed in claim 4, comprising: Providing a first liquid absorbing portion to be cut, and cutting the first liquid absorbing portion to be cut to form a lower portion of the second cutting groove; Providing a third wet absorbent paper to be cut, and cutting the third wet absorbent paper to be cut to form the first cutting groove and the upper part of the second cutting groove; Wrapping the cut third wet absorbent paper outside the first liquid absorbing part to obtain the sanitary napkin core; Or, include: Providing a first liquid absorbing portion to be cut, and cutting the first liquid absorbing portion to form a lower portion of the second cutting groove; Providing a third wet absorbent paper to be cut, and wrapping the third wet absorbent paper to be cut outside the first liquid absorbing part; The third wet absorbent paper to be cut that is wrapped is cut to form the first cutting groove and the upper part of the second cutting groove to obtain the core body for the sanitary napkin.

9. A method for preparing a core for a sanitary napkin, characterized in that: Used to prepare the core body for sanitary napkin as claimed in claim 5, comprising: Providing a convex portion to be cut, and cutting the convex portion to be cut to form an upper portion of the second cutting groove; Providing a core body to be cut, and cutting the core body to be cut to form the first cutting groove and the lower part of the second cutting groove; The cut central convex and the core body are assembled into the core body for the sanitary napkin.

10. A sanitary napkin, characterized in that: It comprises a surface layer, a sanitary napkin core as claimed in any one of claims 1 to 5, and a bottom film which are arranged in sequence; The base film and the surface layer are connected to each other to sandwich the core body therebetween, wherein a surface of the core body on which the first cutting groove and the second cutting groove are opened faces the surface layer.

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