Disposable hygienic product and preparation method thereof

Abstract

The invention belongs to the technical field of personal care, and particularly relates to a disposable hygienic product and a preparation method thereof.The disposable hygienic product comprises an upper layer structure, an absorber layer and a lower layer structure, the absorber layer comprises a composite core body, the composite core body comprises a middle core body layer, the two sides of the middle core body layer are subjected to continuous or discontinuous special-shaped cutting, and the two sides of the middle core body layer are subjected to continuous or discontinuous special-shaped cutting; the shape of the special-shaped cutting is a regular shape or an irregular shape, the regular shape comprises a wave shape, a triangle shape and a square shape, a surface layer at least comprising three different pattern subareas is arranged in the upper layer structure, and the embossing pressure points in the middle area are gradual change points and are gradually reduced towards the two sides by taking the center line of the surface layer as the standard; the height of the subareas on the two sides of the middle area is larger than or equal to the height of a center pressing point of the middle area so that the two side areas can form a dam-like structure. The disposable hygienic product has the advantages that the structure is attractive, the infiltration speed of liquid is increased, and the good rapid infiltration effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of sanitary products, in particular to a disposable sanitary product and a preparation method thereof. Background Art

[0002] The core is a crucial component of disposable hygiene products, serving as the main absorbent element. Currently, most cores on the market are composite cores. These cores are generally straight and uniform in shape, with virtually no height differences between the surface and surrounding areas. This can easily lead to liquid accumulation, slowing down the rate of liquid infiltration. Summary of the Invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid blurring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0004] The present invention provides the following technical solutions to solve one or more of the above technical problems: Disposable sanitary products include an upper structure, an absorbent layer and a lower structure, wherein the absorbent layer is sandwiched between the upper structure and the lower structure. The upper structure includes a surface layer, the surface layer is embossed in partitions, and the number of partitions is greater than or equal to 2; The absorbent layer includes a composite core, which includes an intermediate core layer. Both sides of the intermediate core layer are subjected to special-shaped cutting, so as to change the problem that the composite core is in a single straight strip shape. The lower layer structure includes a bottom non-woven fabric and a bottom film arranged from bottom to top.

[0005] In some embodiments, The two sides of the middle core layer are cut into regular and / or irregular shapes, and the regular shapes include wavy, triangular, and square; The absorbent layer further comprises any one or more of a wood pulp core, absorbent paper, and dust-free paper.

[0006] In some embodiments, The special-shaped cutting is continuous cutting or intermittent cutting; The regular shape is a wave shape, and after special-shaped cutting, a wave line is formed, and the wave line satisfies the following formula In the formula for The wave height at the location, is the peak height, is the peak spacing, is the total length of the wavy line, is the number of peaks, To observe the height, for , is the position of the first wave crest; The formula satisfied by the wavy line is simplified to

[0007] In some embodiments, the peak height 5%~45% of the total width W of the composite core, the peak spacing is the total length of the wavy line 1%~100%, the number of peaks is greater than or equal to 1, the total length of the wave line It is 10%~100% of the total length of the composite core.

[0008] In some embodiments, the shape of the two sides of the middle core layer is not wavy, and the transverse cutting depth is The distance between two adjacent protrusions on one side of the middle core layer is 5% to 45% of the total width W of the composite core. Total cutting length 1%~100%, the number of protrusions on one side of the middle core layer is greater than or equal to 1, and the total cutting length It is 10%~100% of the total length of the composite core.

[0009] In some embodiments, the middle core layer includes a lower layer of hydrophilic non-woven fabric, a first fluffy fabric, a second fluffy fabric and an upper layer of hydrophilic non-woven fabric arranged in sequence from bottom to top, and the first fluffy fabric and the second fluffy fabric are both sprinkled with a polymer water-absorbent resin, and the polymer water-absorbent resin is evenly distributed in the pores of the first fluffy fabric and the second fluffy fabric.

[0010] In some embodiments, The polymer water-absorbing resin is evenly distributed on the corresponding first fluffy cloth and the second fluffy cloth, and / or evenly distributed in the pores on both sides of the first fluffy cloth and the second fluffy cloth; The composite core further includes a hydrophilic covering cloth disposed on the outside of the central core layer; The two sides of the middle core layer are cut into a cut area and an uncut area. The hydrophilic covering cloth corresponding to the cut area includes an upper covering layer and a lower covering layer. The upper covering layer and the lower covering layer on both sides of the middle core layer are bonded and sealed or not.

[0011] In some embodiments, The surface layer includes an upper non-woven fabric and a lower non-woven fabric, and the width of the upper non-woven fabric is less than or equal to the width of the lower non-woven fabric; The surface layer includes three different pattern zones, namely a middle zone I1, a left zone I2, and a right zone I3. The embossing points in the middle zone I1 are gradual points, decreasing step by step from the center line of the surface layer to both sides. The first and second rows of embossing points are staggered or aligned. The heights of the embossing points in the left zone I2 and the right zone I3 are greater than or equal to the height of the central embossing point in the middle zone I1, so that the two side zones form a structure with a low center and high sides. The number of the gradient points is greater than or equal to 2, and the length L1 and width W1 of the next gradient point are 30% to 98% of the length L1 and width W1 of the previous gradient point.

[0012] In some embodiments, the disposable sanitary product includes a three-dimensional guardrail, a first elastic band is provided inside the three-dimensional guardrail, and a second elastic band is provided on the left and right sides of the three-dimensional guardrail. The rear end of the upper structure is the back waist part of the disposable sanitary product, and the back waist part is provided with an elastic waist.

[0013] A method for preparing a disposable sanitary product, the method being used to prepare the disposable sanitary product, comprises the following steps: preparing a superstructure; Preparation of the absorbent layer, which includes preparation of a composite core. The preparation process of the composite core is as follows: laminating a first fluffy cloth on a lower hydrophilic non-woven fabric, spreading a high molecular water-absorbent resin on the first fluffy cloth, laminating a second fluffy cloth on the first fluffy cloth, spreading a high molecular water-absorbent resin on the second fluffy cloth, and then laminating the upper hydrophilic non-woven fabric to the second fluffy cloth to form a preliminary intermediate core layer. The preliminary intermediate core layer is cut into a special shape to form an intermediate core layer. After the cutting is completed, the outer side of the intermediate core layer is compositely coated with a hydrophilic covering cloth, and the hydrophilic covering cloth corresponding to the cut area is pressed and sealed with the intermediate core layer; preparing a substructure; preparing an elastic waist; Composite: The upper structure, absorbent layer, elastic waist and lower structure are composited to form disposable sanitary products.

[0014] Compared with the prior art, the present invention has the following beneficial effects: beautiful structure, fast infiltration rate, good absorption effect, and rapid infiltration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them: Figure 1 is an expanded plan view of a disposable sanitary product in some embodiments of the present invention; Figure 2 yes Figure 1 Schematic diagram of the AA section structure; Figure 3 yes Figure 1 Schematic diagram of the BB cross-section structure; Figure 4 is a plan view of a continuous wavy cut of a composite core in some embodiments of the present invention; Figure 5 yes Figure 4 Schematic diagram of the CC cross-section structure; Figure 6 yes Figure 4 Schematic diagram of the C1-C1 cross-section structure; Figure 7 yes Figure 4 Schematic diagram of the C2-C2 cross-section structure; Figure 8 is a schematic structural diagram of a manual pressurizing instrument in some embodiments of the present invention; Figure 9 is a schematic structural diagram of a composite core with polymers distributed on both sides in some embodiments of the present invention; Figure 10 is a transverse cross-sectional view of a composite core after liquid absorption when the polymer is distributed on both sides in some embodiments of the present invention; Figure 11 is a schematic diagram of a zoned 3D embossed surface layer in some embodiments of the present invention; Figure 12 is a transverse cross-sectional view of a zoned 3D embossing in some embodiments of the present invention; Figure 13 is a plan view of an intermittent wavy cut of a composite core in some embodiments of the present invention; Figure 14 It is an application Figure 13 An unfolded plan view of the disposable sanitary product according to the core shown; Figure 15 is the composite core cut shape of Example 1 of the present invention; Figure 16 is the composite core cut shape of Example 2 of the present invention; Figure 17is the composite core cut shape of Example 3 of the present invention; Figure 18 is a flow chart of a method for preparing a disposable absorbent article in some embodiments of the present invention; Figure 19 is a flow chart of a composite core preparation process in some embodiments of the present invention. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views illustrating device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0019] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0020] Combine Figures 1 to 17 As shown in the content, this embodiment proposes a disposable sanitary product comprising an upper structure 001, an absorbent layer 13 and a lower structure 14, wherein the absorbent layer 13 is sandwiched between the upper structure 001 and the lower structure 14. The upper structure 14 includes a surface layer 25, the surface layer 25 is embossed in zones, and the number of zones is greater than or equal to 2; The absorbent layer 13 includes a composite core 7, and the composite core 7 includes an intermediate core layer 24. Both sides of the intermediate core layer 24 are processed by special-shaped cutting to form a regular shape or an irregular shape. The regular shape includes a wave shape, a triangle, a square, etc., preferably a wave shape. Special-shaped cutting of shapes other than the wave shape can form, for example, Figures 15 to 17 The composite core structure shown; The lower structure 14 comprises a bottom nonwoven fabric 9 and a base film 8 arranged from bottom to top. The end face of the base film 8 described herein, which is close to the composite core 7 side, can be scraped to form a urine-disclosing adhesive.

[0021] The absorbent layer 13 may further include any one or more of a wood pulp core, absorbent paper, dust-free paper, and the like.

[0022] A guide layer may be added to the absorbent layer 13 to better guide the fluid.

[0023] The above-mentioned special-shaped cutting can be continuous cutting or intermittent cutting.

[0024] The shape of the above-mentioned special-shaped cutting is wavy, and the cutting edge is a wavy line. The wavy line can satisfy the following formula , In the formula for The wave height at the location, is the peak height, is the peak spacing (the distance between two peaks), is the total length of the wavy line, is the number of peaks, To observe the height (for example, I need to know the height of the peak at x=300), for , The location of the first wave crest.

[0025] The formula satisfied by the above wavy line can be simplified to , Both through The phase difference relationship determines the position of any Wave height at .

[0026] The peak height can be 5% to 45% of the total width W of the composite core 7 , the peak spacing can be 1% to 100% of the length L of the wave line, the number of peaks can be greater than or equal to 1, and the total length of the wave line can be 10% to 100% of the total length of the composite core 7 .

[0027] The intermediate core layer 24 may include a lower hydrophilic non-woven fabric 21, a first fluffy fabric 22, a second fluffy fabric 23, and an upper hydrophilic non-woven fabric 20, which are arranged in order from bottom to top. The first fluffy fabric 22 and the second fluffy fabric 23 are both sprinkled with a high molecular water-absorbing resin 32, and the high molecular water-absorbing resin 32 is evenly distributed in the pores of the first fluffy fabric 22 and the second fluffy fabric 23. The high molecular water-absorbing resin 32 described herein can be evenly distributed on the corresponding first fluffy fabric 22 and the second fluffy fabric 23 (such as Figure 5 and Figure 6 as shown), and / or evenly distributed in the gaps on both sides of the first fluffy cloth 22 and the second fluffy cloth 23.

[0028] like Figure 9As shown, the polymer water-absorbent resin 32 is evenly distributed only in the pores on both sides of the first fluffy cloth 22 and the second fluffy cloth 23. After the urine is absorbed by the absorber, the polymer water-absorbent resin 32 will swell after absorption. Since the polymer water-absorbent resin 32 is distributed in the pores on both sides of the first fluffy cloth 22 and the second fluffy cloth 23, the two sides will be higher than the middle position after absorbing the urine, forming hollows K, thereby accelerating the infiltration of urine. Figure 10 、 11 shown.

[0029] The composite core 7 further includes a hydrophilic covering fabric 19 disposed on the outside of a central core layer 24. The central core layer 24 is profiled on both sides to form a cut region 18 and an uncut region 17. The hydrophilic covering fabric 19 includes an upper covering layer 19-1 and a lower covering layer 19-2. The upper covering layer 19-1 and the lower covering layer 19-2 on either side of the central core layer 24 may be bonded or unsealed.

[0030] The hydrophilic covering fabric 19 , the lower hydrophilic non-woven fabric 21 and the upper hydrophilic non-woven fabric 20 may be one of air-through non-woven fabric, heat-pressed non-woven fabric, spunlace non-woven fabric and spunbond non-woven fabric.

[0031] The total width W of the intermediate core layer 24 can be 100 mm, the peak height can be 10 mm, and the peak spacing can be 100 mm. When the special-shaped cutting is continuous cutting, the total length of the wave line is equal to the total length of the composite core 7. The length of the composite core 7 can be 375 mm, and the number of peaks can be 4. Figure 13 and Figure 14 As shown, when the special-shaped cutting is intermittent cutting, the absorption capacity of the front and back of the core can be improved, and the front leakage and the back leakage can be reduced. The total length L3 of the wavy line accounts for 10-100% of the total length of the composite core 7. The total length L3 of the wavy line can be preferably 300mm, and the length of the composite core 7 can be 375㎜.

[0032] like Figures 4 to 7 As shown in the figure, since the two sides of the middle core layer 24 in the composite core 7 are cut into special shapes, after the urine is absorbed by the middle core layer 24, the polymer water-absorbing resin 32 will expand after absorption. Under the same amount of urine, since the middle core layer 24 is cut into special shapes, the area of ​​the middle core layer 24 on both sides is smaller, and its expansion speed will be faster, so that a height difference H is formed between the cut area 18 and the uncut area 17. Because the hydrophilic covering cloth 19 is set corresponding to the cut middle core layer 24, the height difference H is more obvious, and the urine will be like Figure 7 As shown by the arrow P in the middle, the liquid flows from high to low, reducing the accumulation of liquid and accelerating the infiltration rate of the liquid.

[0033] By manually adding pressure and adding liquid to simulate the scene of infant use, the test was conducted and the liquid infiltration rate of the composite core 7 after special-shaped cutting was significantly faster than that of the core without special-shaped cutting.

[0034] The specific manual pressure and liquid addition test method can be applied as follows: Figure 8 The illustrated pressurizing instrument 29 comprises a hollow cylindrical liquid-adding barrel 30 and a circular pressurizing chassis 31 disposed at the bottom of the barrel. The top of the barrel 30 is provided with a liquid-adding port, the diameter T of which can be 25 mm. The entire pressurizing instrument 29 can weigh 2.4 kg. The specific experimental equipment used in the manual pressurized liquid-adding test method may also include filter paper, a graduated cylinder, a sodium chloride solution (0.9%), a stopwatch, a ruler, two pressure blocks (1.2 kg each), and an electronic balance (accurate to 0.01 g).

[0035] The specific method of manual pressurization and liquid addition test may include the following steps: Step 1: Lay the composite core 7 or disposable sanitary products using the composite core 7 flat, straighten them, and place them on a horizontal table. Weigh a certain amount of filter paper (denoted as M1) (approximately 15 g) and another certain amount of filter paper (denoted as M2) (approximately 10 g). Place the filter paper at the center of the bottom of the sample and place the pressurizing device at the center of the sample absorbent core. Step 2. Use a graduated cylinder to accurately measure a certain amount of sodium chloride solution (0.9%) (NB / S#: 40ml, M#: 60ml, L / XL / XXL#: 80ml); Step 3: Pour the sodium chloride solution in the measuring cylinder into the pressurized device within 3-5 seconds and start timing at the same time. When the liquid is completely absorbed, that is, when there is no white reflection on the surface, it is recorded as the first absorption rate T1. When the stopwatch reaches 2 minutes, measure the diffusion length and width of the surface layer and record them. Step 4: When the stopwatch reaches 5 minutes, reset it and repeat steps 2 and 3. After the second absorption is completed, the stopwatch does not need to be reset. The second absorption speed is recorded as T2. Step 5: 5 minutes after the second addition of liquid, i.e., when the stopwatch reaches 5 minutes, place filter paper M1 at the center of the sample addition point. At the same time, place two pressure blocks (about 2.4 kg) on ​​top of the filter paper M1 and apply pressure for 1 minute. Step 6: After the pressurization is completed, weigh the filter paper and record it as M3. Weigh the weight of the filter paper at the bottom of the sample and record it as M4.

[0036] The parameters obtained according to the above method can be used to calculate the back permeation volume of the product (unit: g). The specific calculation process is: Backseepage amount = M3-M1, Leakage amount = M4-M2.

[0037] The above-mentioned upper structure 001 also includes a three-dimensional protective guard 1, which includes side non-woven fabrics, and a first elastic band 2 is provided in the side non-woven fabrics. A second elastic band 16 is also provided on the left and right sides of the three-dimensional protective guard 1. The rear end of the upper structure 001 is the back waist part of the disposable sanitary product, and the back waist part can be provided with an elastic waist 15.

[0038] The denier of the first elastic band 2 may be 120D to 1000D, and preferably 620D.

[0039] The denier of the second elastic band 16 may be 120D-1000D, and preferably 620D.

[0040] Waist stickers 3 can be added to the left and right sides of the three-dimensional guard 1, and magic hooks 4 are provided on the waist stickers 3.

[0041] The elastic waist 15 may be composed of a waist non-woven fabric 11 and a third elastic band 12. The waist non-woven fabric 11 may be a water-repellent non-woven fabric.

[0042] The above-mentioned surface layer 25 can be formed into a three-dimensional 3D structure by bonding the upper surface non-woven fabric 5 and the lower surface non-woven fabric 6 through an ultrasonic process or a hot pressing process for online or offline compounding, wherein the width of the upper surface non-woven fabric 5 can be less than or equal to the width of the lower surface non-woven fabric 6.

[0043] The surface layer 25 may be embossed to form at least three partitions. Figure 11 and Figure 12 The content shown takes the example of three zones on the surface layer 25. The three zones are the middle zone I1, the left zone I2, and the right zone I3. The left zone I2 and the right zone I3 are respectively arranged on the left and right sides of the middle zone I1. The embossing points in the middle zone I1 are gradual points, which gradually decrease from the center line of the surface layer to both sides. The number of gradual points is greater than or equal to 2, preferably 4. The first row of embossed points and the second row are offset or aligned, preferably offset. The first row can have a total of 9 embossed points, and the second row can have a total of 10 embossed points. The length L1 and width W1 of the next gradual point are 30% to 98% of the length L1 and width W1 of the previous point. Among them, L1*W1 at point 1 can be 7.4mm*5.3mm, L1*W1 at point 2 can be 6.7mm*4.8mm, L1*W1 at point 3 can be 6.1mm*4.4mm, L1*W1 at point 4 can be 5.5mm*3.9mm, and L1*W1 at point 5 can be 4.9mm*3.5mm.

[0044] By dividing the pressure points and the gradual embossing size, the liquid can be spread to both sides faster, and at the same time, the partition is formed to block the liquid. When the pressure point of the middle area I1 is a gradual pressure point, the side profile of the surface layer 25 is as shown in FIG. Figure 12As shown, the pressure gradually decreases from the center pressure point to the two sides, and the pressure points are of different sizes and heights. This helps the liquid spread to both sides. The surface layer is also embossed in different areas. The middle area I1 is different from the left area I2 and the right area I3. The height of the pressure points in the left area I2 and the right area I3 is greater than or equal to the height of the center pressure point in the middle area I1. This allows the two side areas (left area I2 and right area I3) to form a dam-like structure to block the liquid and prevent side leakage. Figure 12 As shown by the arrow P1.

[0045] A front waist nonwoven fabric 10 can be added below the bottom nonwoven fabric 9 and can be arranged corresponding to the user's abdomen. The front waist nonwoven fabric 10 is arranged corresponding to the magic hook 4.

[0046] Combine Figure 18 The preparation method of the disposable absorbent article can be as follows: Prepare the upper structure 001. The specific preparation process can be as follows: prepare the surface layer, three-dimensional guardrail, and waist patch separately, compound the surface layer with the three-dimensional guardrail, and then compound the waist patches on the left and right sides respectively on this basis, spray the reinforcing glue on the surface layer and the waist patches on the left and right sides, spray the surface layer, arrange the second rubber band glue, and spray glue to prevent side leakage to form the upper structure. The process of preparing the surface layer is to composite the upper surface non-woven fabric and the lower surface non-woven fabric through the existing 3D hot pressing process to form the surface layer; The process of preparing the three-dimensional guardrail is to cut the side non-woven fabric sheet to form the side non-woven fabric, spray the folding glue on the side non-woven fabric, arrange the first elastic band in the area where the folding glue is sprayed, then fold the side non-woven fabric to wrap the first elastic band inside, and then scrape the glue on the end to form the three-dimensional guardrail; The process of preparing the waist patch is to connect the magic hook on the waist patch sheet by scraping glue and laminating, perform S-cutting to form the waist patch preliminary product, scrape glue on the waist patch preliminary product to fix it, and perform short cutting to form the waist patch; The absorbent layer 13 is prepared by the following process: preparing a composite core, opening a groove on the composite core as a guide layer, and cutting the groove into short pieces to form the absorbent layer; The lower layer structure 14 is prepared by spraying glue on the bottom film to compound the bottom non-woven fabric, and scraping the urine-revealing glue on the other side of the bottom film to form the lower layer structure. During this process, the front waist non-woven fabric can be compounded to the outer end face of the bottom non-woven fabric (i.e., the end face away from the human body) by scraping glue.

[0047] The elastic waistband 15 is prepared by spraying glue on the waistband non-woven fabric, applying glue to the third elastic band in the area corresponding to the sprayed glue, then wrapping and folding the waistband non-woven fabric, then cutting the fabric as needed, spraying glue to fix the waistband, and cutting to form the elastic waistband; Compounding, the upper structure 001, the absorbent layer 13 and the lower structure 14 are compounded to form a disposable sanitary product. The specific process can be: compounding the upper structure and the absorbent layer to form product two, compounding the elastic waistband and the lower structure to form product one, spraying glue on the bottom non-woven fabric on product one, and then compounding product one and product two to form a finished product, performing R cutting (using an R cutter to cut the finished product to form leg loops), two folding (folding left and right along the transverse direction of the product), and final cutting (flat cutting along the longitudinal direction of the product, that is, the full length of the product) to form a finished product of a disposable absorbent product.

[0048] The above combination Figure 19 As shown in the content, the preparation process of the composite core can be as follows: compounding (such as spraying compounding) a first fluffy cloth on the lower hydrophilic non-woven fabric, spreading a high molecular water-absorbent resin on the first fluffy cloth, compounding (such as spraying compounding) a second fluffy cloth on the first fluffy cloth, spreading a high molecular water-absorbent resin on the second fluffy cloth, and then compounding (such as spraying compounding) the upper hydrophilic non-woven fabric to the second fluffy cloth to form a preliminary intermediate core layer, using existing special-shaped cutting equipment to perform special-shaped cutting on the preliminary intermediate core layer to form the intermediate core layer, and after cutting, compounding (such as spraying compounding) a hydrophilic covering cloth on the outside of the intermediate core layer, and pressing and sealing the hydrophilic covering cloth corresponding to the cut area.

[0049] The composite core can also be other existing absorbent cores, such as an absorbent core formed by directly wrapping a cotton core with a wrapping cloth.

[0050] The disposable absorbent product can also be prepared by other existing methods. This example only introduces a preparation method of baby diapers.

[0051] The above surface layer structure design and new core can also be applied to other disposable sanitary products, such as baby pull-up pants, adult diapers, adult pull-up pants, women's menstrual pants, women's sanitary napkins and other products.

[0052] The above undisclosed matters can be directly implemented using existing technologies, so they will not be described in detail here.

[0053] Although the present invention has been described above with reference to embodiments, various modifications may be made thereto and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as there are no structural conflicts, the various features of the embodiments disclosed herein may be combined with each other in any manner, and the omission of an exhaustive description of such combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A disposable sanitary product, characterized in that: Disposable sanitary products include an upper structure, an absorbent layer and a lower structure, wherein the absorbent layer is sandwiched between the upper structure and the lower structure. The upper structure includes a surface layer, the surface layer is embossed in partitions, and the number of partitions is greater than or equal to 2; The absorbent layer includes a composite core, the composite core includes an intermediate core layer, and both sides of the intermediate core layer are processed into special shapes; The lower layer structure includes a bottom non-woven fabric and a bottom film arranged from bottom to top.

2. The disposable sanitary product according to claim 1, characterized in that The two sides of the middle core layer are cut into regular and / or irregular shapes, and the regular shapes include wavy, triangular, and square; The absorbent layer further comprises any one or more of a wood pulp core, absorbent paper, and dust-free paper.

3. The disposable sanitary product according to claim 2, characterized in that The special-shaped cutting is continuous cutting or intermittent cutting; The regular shape is a wave shape, and after special-shaped cutting, a wave line is formed, and the wave line satisfies the following formula In the formula for The wave height at the location, is the peak height, is the peak spacing, is the total length of the wavy line, is the number of peaks, To observe the height, for , is the position of the first wave crest; The formula satisfied by the wavy line is simplified to 。 4. The disposable sanitary product according to claim 3, characterized in that The peak height 5%~45% of the total width W of the composite core, the peak spacing is the total length of the wavy line 1%~100%, the number of peaks is greater than or equal to 1, the total length of the wave line It is 10%~100% of the total length of the composite core.

5. The disposable sanitary product according to claim 2, characterized in that: The shape of the two sides of the middle core layer is not wavy, and the horizontal cutting depth is The distance between two adjacent protrusions on one side of the middle core layer is 5% to 45% of the total width W of the composite core. Total cutting length 1%~100%, the number of protrusions on one side of the middle core layer is greater than or equal to 1, and the total cutting length It is 10%~100% of the total length of the composite core.

6. The disposable sanitary product according to claim 2, characterized in that: The middle core layer includes a lower hydrophilic non-woven fabric, a first fluffy fabric, a second fluffy fabric and an upper hydrophilic non-woven fabric arranged in sequence from bottom to top. The first fluffy fabric and the second fluffy fabric are both sprinkled with a polymer water-absorbing resin, which is evenly distributed in the pores of the first fluffy fabric and the second fluffy fabric.

7. The disposable sanitary product according to claim 6, characterized in that The polymer water-absorbing resin is evenly distributed on the corresponding first fluffy cloth and the second fluffy cloth, and / or evenly distributed in the pores on both sides of the first fluffy cloth and the second fluffy cloth; The composite core further includes a hydrophilic covering cloth disposed on the outside of the central core layer; The two sides of the middle core layer are cut into a cut area and an uncut area. The hydrophilic covering cloth corresponding to the cut area includes an upper covering layer and a lower covering layer. The upper covering layer and the lower covering layer on both sides of the middle core layer are bonded and sealed or not.

8. The disposable sanitary product according to claim 1, characterized in that The surface layer includes an upper non-woven fabric and a lower non-woven fabric, and the width of the upper non-woven fabric is less than or equal to the width of the lower non-woven fabric; The surface layer includes three different pattern zones, namely a middle zone I1, a left zone I2, and a right zone I3. The embossing points in the middle zone I1 are gradual points, decreasing step by step from the center line of the surface layer to both sides. The first and second rows of embossing points are staggered or aligned. The heights of the embossing points in the left zone I2 and the right zone I3 are greater than or equal to the height of the central embossing point in the middle zone I1, so that the two side zones form a structure with a low center and high sides. The number of the gradient points is greater than or equal to 2, and the length L1 and width W1 of the next gradient point are 30% to 98% of the length L1 and width W1 of the previous gradient point.

9. The disposable sanitary product according to claim 6 or claim 7, characterized in that: The disposable sanitary product comprises a three-dimensional guardrail, a first elastic band is arranged inside the three-dimensional guardrail, and second elastic bands are arranged on the left and right sides of the three-dimensional guardrail. The rear end of the upper structure is the back waist part of the disposable sanitary product, and the back waist part is provided with an elastic waistline.

10. A method for preparing disposable sanitary products, characterized in that: The preparation method is used to prepare the disposable sanitary product according to claim 9, and the preparation method comprises the following steps: preparing a superstructure; Preparation of the absorbent layer, which includes preparation of a composite core. The preparation process of the composite core is as follows: laminating a first fluffy cloth on a lower hydrophilic non-woven fabric, spreading a high molecular water-absorbent resin on the first fluffy cloth, laminating a second fluffy cloth on the first fluffy cloth, spreading a high molecular water-absorbent resin on the second fluffy cloth, and then laminating the upper hydrophilic non-woven fabric to the second fluffy cloth to form a preliminary intermediate core layer. The preliminary intermediate core layer is cut into a special shape to form an intermediate core layer. After the cutting is completed, the outer side of the intermediate core layer is compositely coated with a hydrophilic covering cloth, and the hydrophilic covering cloth corresponding to the cut area is pressed and sealed with the intermediate core layer; preparing a substructure; preparing an elastic waist; Composite: The upper structure, absorbent layer, elastic waist and lower structure are composited to form disposable sanitary products.

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