Novel core and disposable hygiene article

Abstract

The utility model discloses belong to personal care technical field, concretely is a kind of novel core body and disposable sanitary product, at least one groove is set up on novel core body, groove is regular shape and / or irregular shape, the groove is set in the middle or both sides of novel core body;The novel core body is wood pulp core body, and the novel core body is simple and beautiful in structure, and the percolation effect is good.The novel core body can be directly used as the absorbent layer of disposable sanitary product, and is combined with the upper structure and the lower structure to form a finished product, and the upper cover cloth corresponding to the groove and the lower cover cloth are closed or not closed after compounding, the gap K between the surface layer and the absorbent layer can be formed in the closed case, which is beneficial to the rapid percolation of urine, and diffusion is carried out through the guide channel.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products, specifically a novel core and disposable hygiene products. Background Technology

[0002] The absorbent core is a crucial component of disposable hygiene products, serving as the primary absorbent material. Currently, to improve absorbency, absorbent cores on the market often feature drainage channels on their upper surface. However, these channels are typically formed by applying superabsorbent polymers, adding a non-woven fabric layer, and then hot-pressing the mixture. These methods require additional materials and increase the core's thickness, negatively impacting breathability and user comfort. Utility Model Content

[0003] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0004] This utility model provides the following technical solutions to solve one or more of the above-mentioned technical problems:

[0005] A novel core having grooves cut into it, the grooves being of regular and / or irregular shapes.

[0006] In some implementations...

[0007] The novel core has at least one groove, which is located in the middle or on both sides of the novel core;

[0008] The novel core is a wood pulp core.

[0009] In some implementations...

[0010] The length of the groove is less than or equal to the length of the novel core;

[0011] The width of the groove setting area is less than or equal to 90% of the width of the novel core;

[0012] The width of the groove is greater than or equal to 4 mm.

[0013] In some implementations...

[0014] The novel core includes a hydrophilic coating fabric and an intermediate absorbent layer. The groove is excavated on the intermediate absorbent layer. The intermediate absorbent layer is prepared from wood pulp and superabsorbent polymer.

[0015] The portion of the hydrophilic covering fabric corresponding to the tank includes an upper covering fabric and a lower covering fabric. The upper covering fabric and the lower covering fabric may be closed or not closed, but are preferably closed.

[0016] In some embodiments, the hydrophilic covering fabric is any one of hot-air nonwoven fabric, hot-pressed nonwoven fabric, spunlace nonwoven fabric, and spunbond nonwoven fabric.

[0017] In some embodiments, the upper covering fabric is sealed to the lower covering fabric.

[0018] A disposable hygiene product comprising the novel core described in any of the above claims.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the groove with a flow guiding function is directly excavated on the new core without the need for additional materials, which improves the aesthetics and comfort of the new core, facilitates the infiltration and diffusion of liquid, reduces the accumulation of liquid, accelerates the infiltration speed of liquid on the new core, and reduces the contact area between the new core and the surface layer, thereby reducing the backflow of liquid. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1 This is a plan view of a disposable sanitary product according to some embodiments of this utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle AA section;

[0023] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle BB section;

[0024] Figure 4 This is a schematic diagram of the structure of the novel core in Example 1 of this utility model;

[0025] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure between C1 and C1;

[0026] Figure 6 After aspirating the liquid Figure 4 A structural schematic diagram from the C1-C1 cross-section perspective;

[0027] Figure 7This is a schematic diagram of the manual pressurization instrument structure in some embodiments of this utility model;

[0028] Figure 8 This is a performance test comparison data table of core grooved and non-grooved embodiments of this utility model;

[0029] Figure 9 This is a schematic diagram of the structure of the novel core in Example 2 of this utility model;

[0030] Figure 10 yes Figure 9 Schematic diagram of the cross-sectional structure between C1 and C1;

[0031] Figure 11 This is an application in some embodiments of this utility model. Figure 9 A plan view of a disposable hygiene product with a novel core shown;

[0032] Figure 12 After aspirating the liquid Figure 9 A structural schematic diagram from the C1-C1 cross-section perspective;

[0033] Figure 13 This is a schematic diagram of the structure of the novel core of Example 3 of this utility model;

[0034] Figure 14 This is a schematic diagram of the structure of the novel core of Example 4 of this utility model;

[0035] Figure 15 This is a schematic diagram of the structure of the novel core of Example 5 of this utility model;

[0036] Figure 16 This is a schematic diagram of the structure of the novel core of Example 6 of this utility model. Detailed Implementation

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide 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 can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0041] Combination Figures 1 to 16 As shown in this embodiment, a novel core 7 is provided with at least one groove 17. The groove 17 can be located in the middle or on both sides of the novel core 7, and can have a regular shape and / or an irregular shape. The regular shape described herein can be a straight strip, an oblong shape, etc. The groove 17 described herein can be symmetrically distributed about the center line of the novel core 7, or it can be not symmetrically distributed about the center line of the novel core 7. The shape of the groove can also be customized as needed.

[0042] The aforementioned novel core 7 can be a wood pulp core, which may include a hydrophilic covering fabric 19 and an intermediate absorbent layer 24. A groove 17 is cut into the intermediate absorbent layer 24, which may be composed of wood pulp and superabsorbent polymer. The hydrophilic covering fabric 19 can be any one of hot-air nonwoven fabric, hot-pressed nonwoven fabric, spunlace nonwoven fabric, and spunbond nonwoven fabric. The left and right ends of the hydrophilic covering fabric 19 can be folded upwards from both sides to cover the intermediate absorbent layer 24, and after covering, the left and right ends of the hydrophilic covering fabric 19 can be stacked. The hydrophilic covering fabric 19 can be a hydrophilic nonwoven fabric.

[0043] The portion of the hydrophilic covering fabric 19 corresponding to the tank body 17 includes an upper covering fabric 19-1 placed above the intermediate absorption layer 24 and a lower covering fabric 19-2 placed below the intermediate absorption layer 24. The upper covering fabric 19-1 and the lower covering fabric 19-2 may be closed or not closed, but are preferably closed.

[0044] The length L of the aforementioned groove 17 is less than or equal to the length L1 of the novel core 7; the width W of the groove setting area is less than or equal to 90% of the width W1 of the novel core.

[0045] The width W2 of the aforementioned groove can be greater than or equal to 4 mm.

[0046] Example 1: A groove is provided in the middle of the new core 7. The shape of the groove can be as follows: Figure 1 and Figure 4As shown, the groove has a straight strip in the middle and forks outwards at both ends (a V-shaped structure). The relevant parameters of this new core are as follows: The width W1 of the new core is the width of its head and tail, and W1 can range from 4 mm to 200 mm (e.g., 120 mm). The width of the middle section of the new core can be smaller than the width of its head and tail, and the width of this middle section can be 4-200 mm (e.g., 90 mm). In this case, the width W of the groove setting area can be 40-80 mm (e.g., 64 mm). The width W2 of the groove can be greater than or equal to 4 mm (e.g., the width of the head and tail of the groove is 10 mm, and the width of the middle is 8 mm). The length L1 of the new core is 200 mm to 800 mm (e.g., 380 mm), and the length L of the groove is 200 mm to 800 mm (e.g., 240 mm).

[0047] Example 2: Grooves are provided on both sides of the center of the new core 7. The shape of the grooves can be as follows: Figure 9 and Figure 11 As shown, the middle of the groove is a straight strip, and the two ends are straight strips extending outwards. The relevant parameters of this new core are as follows: The width W1 of the new core is the width of its head and tail, and W1 can range from 4 mm to 200 mm (e.g., 120 mm). The width of the middle position of the new core can be smaller than the width of its head and tail, and this middle position width can be 4-200 mm (e.g., 100 mm). In this case, the width W of the groove setting area can be 65-105 mm (e.g., 85 mm). The width W2 of the groove can be greater than or equal to 4 mm (e.g., the width of the head and tail of the groove is 10 mm, and the middle width is 8 mm). The length L1 of the new core is 300 mm to 800 mm (e.g., 380 mm), and the length L of the groove is 140 mm to 800 mm (e.g., 180 mm). The spacing W3 between the grooves dug on both sides of the center of the new core 7 is 20mm~50mm (e.g., 35mm).

[0048] Example 3: Grooves are provided on both sides of the center of the novel core 7. The shape of the grooves can be a combination of regular and irregular shapes, such as: Figure 13 The second tank 17-1 shown Figure 14 The third tank 17-2 shown Figure 15 The fourth tank 17-3 shown Figure 16 The fifth groove 17-4 shown is an example of this new type of core. The relevant parameters of this core can be found in Example 2.

[0049] A disposable hygiene product includes the aforementioned novel core 7.

[0050] By manually applying pressure and adding liquid to simulate the scenario of using the product on an infant, the liquid seepage rate of the new core 7 is significantly faster than that of products without grooves in the core.

[0051] Specific manual pressurization and liquid addition testing methods can be applied as follows: Figure 7The pressure instrument 29 shown includes a hollow cylindrical liquid filling tank 30 and a circular pressure base 31 located at the bottom of the liquid filling tank 30. The liquid filling tank 30 has a liquid filling port at the top, and the diameter T of the liquid filling port can be 25 mm. The weight of the entire pressure instrument 29 can be 2.4 kg. Specific experimental equipment used in the manual pressure and liquid filling test method may also include filter paper, a graduated cylinder, sodium chloride solution (0.9%), a stopwatch, a measuring ruler, two pressure blocks (1.2 kg / block), and an electronic balance (accurate to 0.01 g).

[0052] The specific method for manual pressurization and liquid addition testing may include the following steps:

[0053] Step 1: Lay the new core 7 or the disposable sanitary product using the new core 7 flat and straighten it on a horizontal table; weigh a certain amount of filter paper M1 (about 15g) and another certain amount of filter paper M2 (about 10g), place the filter paper at the bottom center of the sample, and place the pressure device at the center of the sample absorption core.

[0054] Step 2: Accurately measure a certain amount of sodium chloride solution (0.9%) using a graduated cylinder (NB / S#: 40ml, M#: 60ml, L / XL / XXL#: 80ml).

[0055] Step 3: Pour the sodium chloride solution from the graduated cylinder into the pressurization device within 3-5 seconds and start timing simultaneously. When the liquid is just completely absorbed, i.e., when there is no white reflection on the surface, record it as the first absorption rate T1. At 2 minutes, measure the diffusion length and width of the surface layer with the stopwatch and record them.

[0056] Step 4: When the stopwatch reaches 5 minutes, reset it to zero. Repeat steps 2 and 3. After the second absorption is completed, the stopwatch does not need to be reset to zero. Record the second absorption speed as T2.

[0057] Step 5: 5 minutes after the second liquid addition begins (i.e., when the stopwatch reaches 5 minutes), place filter paper M1 at the center of the sample liquid addition point, and simultaneously place the pressure block (2 blocks, approximately 2.4 kg) overlapping on filter paper M1, and apply pressure for 1 minute.

[0058] Step 6: After pressurization is completed, weigh the filter paper and record the weight as M3, and weigh the filter paper at the bottom of the sample and record the weight as M4.

[0059] The parameters obtained using the above method can be used to calculate the product's reabsorption rate (unit: g). The specific calculation process is as follows:

[0060] Re-infiltration amount = M3 - M1

[0061] Leakage amount = M4 - M2.

[0062] like Figure 8As shown in the comparison data of liquid infiltration rate of the new core 7 and the performance test data of the product without grooves in the core, the product performance of the new core 7 is significantly better than that of the product without grooves in the core.

[0063] The disposable hygiene product includes an upper structure 12, an absorbent layer 13, and a lower structure 14. The absorbent layer 13 includes the novel core 7 described above. The upper structure 12 and the lower structure 14 are located on the upper and lower sides of the absorbent layer 13, and the upper structure 12, absorbent layer 13, and lower structure 14 are combined to form a whole. The absorbent layer 13 described herein may also be composed of a single or multiple components such as a wood pulp core, a composite core, absorbent paper, or dust-free paper.

[0064] The upper structure 12 includes a three-dimensional protective barrier 1 and a surface layer 25. The surface layer 25 includes an upper non-woven fabric 5 and a lower non-woven fabric 6. The width of the upper non-woven fabric 5 is less than or equal to the width of the lower non-woven fabric 6. The three-dimensional protective barrier 1 is provided with a first elastic band 2. The left and right sides of the three-dimensional protective barrier 1 are also provided with second elastic bands 16 corresponding to the legs. The rear end of the upper structure 12 is the back waist part of the disposable sanitary product, and the back waist part is provided with an elastic waistband 15.

[0065] The lower structure 14 includes a bottom nonwoven fabric 9 and a bottom film 8 arranged from bottom to top.

[0066] The aforementioned surface layer 25 can be a three-dimensional surface layer formed by bonding the upper surface nonwoven fabric 5 and the lower surface nonwoven fabric 6 through an ultrasonic process or a hot-pressing process, either through online or offline lamination.

[0067] Combination Figure 6 The novel core 7 shown has a groove 17 cut into its center, and the upper covering fabric 19-1 and the lower covering fabric 19-2 corresponding to the groove 17 are bonded and sealed, creating a gap K between the surface layer 25 and the absorbent layer 13. This facilitates rapid urine infiltration and diffusion through the channel 17. Figure 12 As shown, due to the grooves 17 on both sides of the novel core 7, after urine is absorbed by the middle absorbent layer 24, the polymer expands after absorption, causing the ungrooved areas in the middle and on both sides to bulge. This creates a height difference H between the grooves 17 and the ungrooved areas 18. Because the upper and lower layers 19-1 and 19-2 of the hydrophilic covering fabric corresponding to the grooves 17 are bonded and sealed, this height difference H becomes more pronounced, causing urine to flow from higher to lower areas, as shown by arrow P3. This reduces liquid accumulation and accelerates the downward infiltration rate. The urine also diffuses through the channels of the grooves 17, as shown by arrow P3, further reducing liquid accumulation and accelerating the downward infiltration rate. The diffusion of urine within the grooved core is greater than that within the ungrooved core. This also reduces the contact between the core and the surface layer, thereby reducing backflow of urine.

[0068] The denier of the first elastic band 2 can be 120D-1000D, preferably 620D.

[0069] The denier of the second elastic band 16 can be 120D-1000D, preferably 620D.

[0070] The aforementioned elastic waistband 15 may be composed of a water-repellent nonwoven fabric 151 and a third elastic band 152.

[0071] Taking disposable hygiene products as baby diapers as an example, waist tabs 3 can be added to the left and right sides of the disposable hygiene products, and the waist tabs 3 are equipped with hooks 4 (i.e., the hook side of the hook and loop fastener). The outer end face of the bottom non-woven fabric 9 can be laminated with the front waist tab non-woven fabric 10, and the front waist tab non-woven fabric 10 is set correspondingly to the hooks 4.

[0072] The aforementioned novel core can also be applied to products such as baby pull-up diapers, adult diapers, adult pull-up pants, women's menstrual pants, and feminine hygiene products.

[0073] The aforementioned undisclosed matters can be directly implemented using existing technologies, so they will not be elaborated upon here.

[0074] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity 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 novel core, characterized in that, The novel core has grooves carved into it, and these grooves are in regular and / or irregular shapes. The novel core has at least one groove, which is located in the middle or on both sides of the novel core; The length of the groove is less than or equal to the length of the novel core; The width of the groove setting area is less than or equal to 90% of the width of the novel core; The width of the groove is greater than or equal to 4 mm.

2. The novel core according to claim 1, characterized in that, The novel core is a wood pulp core.

3. The novel core according to claim 1, characterized in that, The novel core includes a hydrophilic coating fabric and an intermediate absorbent layer. The groove is excavated on the intermediate absorbent layer. The intermediate absorbent layer is prepared from wood pulp and superabsorbent polymer. The portion of the hydrophilic covering fabric corresponding to the tank includes an upper covering fabric and a lower covering fabric, which may or may not be closed.

4. The novel core according to claim 3, characterized in that, The hydrophilic covering fabric is any one of hot-air nonwoven fabric, hot-pressed nonwoven fabric, spunlace nonwoven fabric, and spunbond nonwoven fabric.

5. The novel core according to claim 4, characterized in that, The upper covering fabric is sealed to the lower covering fabric.

6. A disposable hygiene product, characterized in that, The novel core includes any one of claims 1 to 5.

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