Transverse and longitudinal diversion absorption article and preparation method thereof

Abstract

The invention relates to the field of disposable hygienic products, in particular to a transverse and longitudinal flow guide absorption article and a preparation method thereof.The preparation method comprises the following steps that S1, materials of a liquid-permeable surface layer, a flow guide layer, an absorption core layer and a liquid-tight bottom layer are taken for assembly line conveying; s2, the flow guide layer material conveyed by the assembly line is treated through a forming mechanism, so that the flow guide layer material is conveyed in a two-piece type at an interval, and the interval is the width of the longitudinal flow guide groove; s3, laminating and compounding a liquid-permeable surface layer, the flow guide layer after the step S2, an absorption core layer and a liquid-tight bottom layer material, fixedly connecting into a whole, and continuously conveying; s4, slitting the product obtained in the step S3 to obtain a single absorption article; the forming mechanism comprises a cutting roller set used for cutting a single flow guide layer material along the conveying center of the material and forming two separated flow guide pieces, a forming roller set used for adjusting the interval between the two flow guide pieces after cutting, and a driving roller set arranged behind the output end of the forming roller set and used for pulling the material to be conveyed.

Description

Technical Field

[0001] The invention relates to the field of disposable sanitary products, and in particular to a transverse and longitudinal flow-guiding absorbent article and a preparation method thereof. Background Art

[0002] The basic structure of current disposable sanitary products is mostly as shown in Chinese patent application CN 114145913 A, a leakproof absorbent article, the leakproof absorbent article comprises a liquid permeable surface layer, a guide layer, an absorbent layer, a breathable bottom layer, and a bottom nonwoven fabric arranged in sequence from top to bottom;

[0003] The leakproof absorbent article further comprises: a three-dimensional elastic guard and a leakproof component;

[0004] Both lateral sides of the liquid-permeable surface layer are provided with elastic three-dimensional guards that are higher than the liquid-permeable surface layer;

[0005] The leakage-proof components are disposed at both longitudinal ends of the liquid-permeable surface layer.

[0006] The guide structure is a guide layer structure arranged on the upper surface of the absorption layer, which conducts the liquid to the absorption layer below through the material properties of the guide layer, while ensuring a small amount of back seepage.

[0007] Currently, most of the diversion layers on the market are designed to cover the entire absorption layer. Such a structure cannot guarantee complete diversion for instantaneous large-flow body fluids, and cannot absorb them evenly and quickly. Summary of the invention

[0008] Therefore, the present invention provides a transverse and longitudinal flow-guiding absorbent article and shows its preparation method, so as to solve the problem that the internal flow-guiding layer of the current absorbent article cannot guide the flow quickly and evenly.

[0009] To achieve the above object, the present invention is achieved through the following technical solutions:

[0010] A transverse and longitudinal diversion absorbent article has a longitudinal direction in the length direction and a transverse direction in the width direction. The absorbent article includes a liquid permeable surface layer, an absorbent core layer and a liquid impermeable bottom layer stacked from top to bottom. A diversion layer is arranged between the liquid permeable surface layer and the absorbent core layer. The diversion layer includes two diversion plates symmetrically arranged at the center of the absorbent core layer. The two diversion plates extend to the longitudinal ends of the absorbent article. A longitudinal diversion groove extending in the longitudinal direction is formed between the two diversion plates. The two diversion plates are provided with a plurality of transverse diversion parts extending in the transverse direction or inclined to the transverse direction.

[0011] Preferably, the transverse guide portion is a linear hollow groove.

[0012] Preferably, the lateral guide portion is a plurality of holes distributed in a straight line.

[0013] Preferably, each of the lateral guide portions is arranged radially around the center of the absorbent article.

[0014] Preferably, the width of the longitudinal guide groove is any value between 5 and 10 mm.

[0015] Preferably, the lateral edge of the guide layer is located within the range of the absorbent core layer.

[0016] A method for preparing a transverse and longitudinal flow-guiding absorbent article comprises the following steps:

[0017] S1, respectively taking the liquid permeable surface layer, the guide layer, the absorbent core layer, and the liquid impermeable bottom layer materials for assembly line transportation;

[0018] S2, processing the guide layer material conveyed by the assembly line through a forming mechanism, so that the guide layer material is formed into two pieces for interval conveyance, and the interval is the width of the longitudinal guide groove;

[0019] S3, laminating and compounding the liquid-permeable surface layer, the guide layer after step S2, the absorbent core layer, and the liquid-impermeable bottom layer material, fixing them into one body, and continuing to transport;

[0020] S4, cutting the product obtained in S3 into individual absorbent articles;

[0021] The forming mechanism includes a cutting roller group for cutting a single sheet of guide layer material along its conveying center to form two separated guide plates, a forming roller group for adjusting the interval between the two guide plates after cutting, and a driving roller group arranged behind the output end of the forming roller group for pulling the material for conveying.

[0022] Preferably, the forming roller group includes two symmetrically distributed conical rollers, and the large-diameter ends of the two conical rollers are arranged close to each other so that the two guide vanes are transported at intervals.

[0023] Preferably, the forming roller group includes an upper forming convex roller located above and a corresponding lower forming convex roller, the lower forming convex roller is located behind the upper forming convex roller, the axial center of the upper forming convex roller is provided with an upper convex portion for folding the adjacent ends of the two guide plates downward, and the axial center of the lower forming convex roller is provided with a lower convex portion for folding the folding position upward and inward.

[0024] Preferably, a punching roller group for punching holes in the two guide plates to form the lateral guide portion is provided at the front end or the rear end of the forming mechanism.

[0025] By adopting the above technical solution, the beneficial effects of the present invention are:

[0026] The technical solution improves the traditional single-piece guide layer structure, and a longitudinal guide groove running through the center of the absorbent article is provided, and transverse guide parts are arranged on both sides of the longitudinal guide groove. For the absorption of body fluid, the longitudinal guide groove directly guides it to the longitudinal direction of the absorbent article and disperses it, and the body fluid falling on the guide plate is guided laterally by the transverse guide part, so that the absorbent core layer is fully utilized. When the amount of body fluid is large, the design of the longitudinal guide groove enables the absorbent core layer located at this position to directly contact the body fluid, which can achieve instantaneous and rapid longitudinal guidance. The design of the guide plate, combined with the "boat-shaped" structure formed when the absorbent article is worn, can prevent the body fluid from continuing to spread directly from the guide layer to the transverse sides, and play a certain degree of leakage prevention role. Compared with the traditional guide layer, it has the effect of rapid guidance and uniform dispersion;

[0027] In production, in the current layout of materials, each piece of material usually requires a separate set of assembly line conveyor rollers. The technical solution adopts a form in which a single piece of guide layer material is longitudinally cut and spaced and then arranged. In conjunction with a forming mechanism, the layout of a set of guide plate conveyor rollers can be simplified, and the layout of necessary conveying mechanisms such as deviation correction and material storage is correspondingly reduced. At the same time, when adjusting the width of the longitudinal guide groove, it is only necessary to adjust the forming mechanism, which greatly simplifies the difficulty of equipment layout and debugging, facilitates subsequent adjustments and maintenance, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the unfolded structure of the absorbent article according to an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of a stacked structure according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the decomposed structure of the guide layer and the absorbent core layer in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the decomposed structure of another guide layer and an absorbent core layer in an embodiment of the present invention;

[0032] Figure 5 It is a structural schematic diagram of a molding structure in an embodiment of the present invention;

[0033] Figure 6 It is a structural schematic diagram of a forming roller group in an embodiment of the present invention;

[0034] Figure 7 It is a schematic diagram of the forming structure under another structural forming roller group structure in an embodiment of the present invention.

[0035] Figure numerals: 100, liquid-permeable surface layer; 200, absorbent core layer; 300, liquid-impermeable bottom layer; 400, guide layer; 401, guide plate; 402, longitudinal guide groove; 403, transverse guide part; 403a, hollow groove; 403b, hole part; 1, cutting roller group; 2, punching roller group; 3, forming roller group; 31, conical roller; 32, forming upper convex roller; 321, upper convex part; 33, forming lower convex roller; 331, lower convex part; 4, driving roller group. DETAILED DESCRIPTION

[0036] The following will describe the implementation methods of the present invention in detail in conjunction with specific embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0037] refer to Figures 1 to 3 A transverse and longitudinal diversion absorbent article, taking a diaper as an example here, has a longitudinal direction in the length direction and a transverse direction in the width direction, the absorbent article comprises a liquid-permeable surface layer 100, an absorbent core layer 200 and a liquid-impermeable bottom layer 300 stacked from top to bottom, a diversion layer 400 is arranged between the liquid-permeable surface layer 100 and the absorbent core layer 200, the diversion layer 400 comprises two diversion plates 401 symmetrically arranged at the center of the absorbent core layer 200, the two diversion plates 401 extend to the longitudinal ends of the absorbent article, and a longitudinal diversion groove 402 extending in the longitudinal direction is formed between the two diversion plates 401, wherein the width X of the longitudinal diversion groove 402 can be any value between 5-10 mm depending on the product; under the traditional structure, body fluid infiltrates through the complete diversion plate 401; and in the technical solution, a plurality of transverse diversion parts 403 extending in the transverse direction can be designed on the two diversion plates 401. The technical solution improves the traditional single-piece guide layer 400 structure, and opens a longitudinal guide groove 402 running vertically through the center of the absorbent article, and arranges transverse guide parts 403 on both sides of the longitudinal guide groove 402. For the absorption of body fluids, the longitudinal guide groove 402 directly guides the body fluids to be dispersed in the longitudinal direction of the absorbent article, and the body fluids falling on the guide plate 401 are laterally guided by the transverse guide parts 403, thereby making full use of the absorbent core layer 200. When the amount of body fluids is large, the design of the longitudinal guide groove 402 enables the absorbent core layer 200 located at this position to directly contact the body fluids, thereby realizing instantaneous and rapid longitudinal guidance.

[0038] Specifically, the transverse guide portion 403 is a straight hollow groove 403a; in this way, the body fluid can directly infiltrate through the hollow groove 403a, and the absorption rate can be further improved in the process of the body fluid spreading to the two sides laterally; accordingly, the transverse guide portion 403 can also be a plurality of holes 403b distributed in a straight line; regardless of the design of the hollow groove 403a and the array hole portion 403b, only the cutting knife forming roller needs to be changed during the forming, and the selection of the two can be adjusted according to the different types of absorbent articles produced (diapers or sanitary napkins, etc.), and the required structural form is adjusted accordingly, and only diapers are taken as an example here;

[0039] Structurally, the lateral edge of the guide layer 400 is located within the range of the absorbent core layer 200 to ensure that the body fluid that has seeped through the guide layer 400 can fall on the absorbent core layer 200 and be accurately absorbed.

[0040] refer to Figure 4 Compared with the above structure, each of the transverse guide portions 403 is arranged obliquely to the transverse direction, forming a radial arrangement with the center of the absorbent article. When worn, the design of the guide plate 401, combined with the "boat-shaped" structure formed when the absorbent article is worn, can prevent body fluids from directly spreading from the guide layer 400 to the lateral sides, playing a certain degree of leakage prevention role, and compared with the traditional guide layer 400, it has the effect of rapid guidance and uniform dispersion.

[0041] This technical solution does not describe the leak-proof edges, waistline and other components of the diaper product. This is not the main improvement of this technical solution and will not be elaborated here.

[0042] Next, the two guide plates 401 are formed using a production process different from the traditional one.

[0043] A method for preparing a transverse and longitudinal flow-guiding absorbent article comprises the following steps:

[0044] S1, respectively taking the liquid permeable surface layer 100, the guide layer 400, the absorbent core layer 200, and the liquid impermeable bottom layer 300 materials for assembly line transportation;

[0045] S2, the guide layer 400 material conveyed by the assembly line is processed by a forming mechanism, so that the guide layer 400 material is conveyed in two pieces at intervals, and the interval is the width of the longitudinal guide groove 402;

[0046] S3, stacking and compounding the liquid-permeable surface layer 100, the guide layer 400 after step S2, the absorbent core layer 200, and the liquid-impermeable bottom layer 300, fixing them into one body and continuing to transport;

[0047] S4, cutting the product obtained in S3 into individual absorbent articles;

[0048] refer to Figure 5 The forming mechanism includes a cutting roller group 1 for cutting a single-piece guide layer 400 material along its conveying center to form two separated guide plates 401, a forming roller group 3 for adjusting the interval between the two guide plates 401 after cutting, and a driving roller group 4 arranged behind the output end of the forming roller group 3 for pulling the material for conveying; here, when the assembly line accuracy is sufficient, the driving roller group 4 may not be provided; and the design of the driving roller group 4, that is, increasing the driving force behind the forming roller group 3, thereby ensuring that the interval between the two guide plates 401 remains stable, avoiding deviation in subsequent conveying.

[0049] Structurally, there are currently two structural forms:

[0050] ①.Reference Figure 6 The forming roller group 3 includes two symmetrically distributed conical rollers 31, and the large diameter ends of the two conical rollers 31 are arranged close to each other so that the two guide vanes 401 are transported at intervals; that is, the large diameter ends of the two conical rollers 31 are close to each other, and the guide vanes 401 are separated from each other as the conveying proceeds after passing through the conical rollers 31, thereby obtaining the required spacing as the longitudinal guide grooves 402; and when adjusting this spacing, the desired effect can be obtained by changing the models of the two conical rollers 31 and selecting different radial differences at the two ends; or by changing the spacing between the two conical rollers 31;

[0051] ②, also refer to Figure 7 The forming roller group 3 includes an upper forming convex roller 32 located at the top and a lower forming convex roller 33 located at the bottom. The lower forming convex roller 33 is located behind the upper forming convex roller 32. The axial center of the upper forming convex roller 32 is provided with an upper convex portion 321 for folding the adjacent ends of the two guide plates 401 downward. The axial center of the lower forming convex roller 33 is provided with a lower convex portion 331 for folding the folding position upward and inward. After the forming upper convex roller 32 and the forming lower convex roller 33, the inner ends of the two guide plates 401 form a folded structure, and the required spacing as the longitudinal guide groove 402 is formed between the transverse ends; in terms of structure, the widths of the upper convex portion 321 and the lower convex portion 331 are gradually increased, and the upper convex portion 321 is easy to insert between the two guide plates 401 and make the ends of the guide plates 401 gradually turn down; the lower convex portion 331 ensures that the ends of the two turned-down guide plates 401 are inserted first, and the ends of the guide plates 401 are gradually turned up;

[0052] Correspondingly, when a transverse guide portion 403 is required, a punching roller group 2 is provided at the front end or rear end of the forming mechanism for punching holes in the two guide plates 401 to form the transverse guide portion 403 to obtain a hollow groove 403a or a hole 403b structure.

[0053] In production, in the current layout of materials, each piece of material usually requires a separate set of assembly line conveyor rollers. The technical solution adopts a form in which a single piece of guide layer 400 is cut longitudinally and spaced and then arranged. In conjunction with a forming mechanism, the layout of a set of guide plates 401 conveyor rollers can be simplified, and the layout of necessary conveying mechanisms such as deviation correction and material storage is correspondingly reduced. At the same time, when adjusting the width of the longitudinal guide groove 402, it is only necessary to adjust the forming mechanism, which greatly simplifies the difficulty of equipment layout and debugging, facilitates subsequent adjustments and maintenance, and is highly practical.

[0054] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A transverse and longitudinal flow-guiding absorbent article having a longitudinal direction and a transverse direction, the absorbent article comprising a liquid-permeable surface layer (100), an absorbent core layer (200) and a liquid-impermeable bottom layer (300) stacked from top to bottom, characterized in that: A guide layer (400) is arranged between the liquid-permeable surface layer (100) and the absorbent core layer (200), and the guide layer (400) includes two guide plates (401) symmetrically arranged at the center of the absorbent core layer (200), the two guide plates (401) extend to the longitudinal ends of the absorbent article, and a longitudinal guide groove (402) extending in the longitudinal direction is formed between the two guide plates (401), and the width of the longitudinal guide groove (402) is any value between 5 and 10 mm, and a plurality of transverse guide parts (403) extending in the transverse direction or inclined to the transverse direction are arranged on the two guide plates (401).

2. A transverse and longitudinal flow-guiding absorbent article according to claim 1, characterized in that: The transverse guide portion (403) is a straight hollow groove (403a).

3. A transverse and longitudinal flow-guiding absorbent article according to claim 1, characterized in that: The transverse guide portion (403) is a plurality of hole portions (403b) distributed in a straight line.

4. A transverse and longitudinal flow-guiding absorbent article according to claim 1, 2 or 3, characterized in that: Each of the transverse flow guide portions (403) is arranged radially around the center of the absorbent article.

5. A transverse and longitudinal flow-guiding absorbent article according to claim 1, 2 or 3, characterized in that: The lateral edge of the guide layer (400) is located within the range of the absorbent core layer (200).

6. A method for preparing a transverse and longitudinal flow-guiding absorbent article according to claim 1, characterized in that: The following steps are involved: S1, respectively taking the liquid permeable surface layer (100), the guide layer (400), the absorbent core layer (200), and the liquid impermeable bottom layer (300) materials for assembly line transportation; S2, processing the guide layer (400) material conveyed by the assembly line through a forming mechanism, so that the guide layer (400) material is formed into two pieces for interval conveyance, and the interval is the width of the longitudinal guide groove (402); S3, laminating and compounding the liquid-permeable surface layer (100), the guide layer (400) after step S2, the absorbent core layer (200), and the liquid-impermeable bottom layer (300), fixing them into one body, and continuing to transport; S4, cutting the product obtained in S3 into individual absorbent articles; The forming mechanism comprises a cutting roller group (1) for cutting a single-piece guide layer (400) material along its conveying center to form two separated guide plates (401), a forming roller group (3) for adjusting the interval between the two guide plates (401) after cutting, and a driving roller group (4) arranged behind the output end of the forming roller group (3) for pulling the material for conveying.

7. A method for preparing a transverse and longitudinal flow-guiding absorbent article according to claim 6, characterized in that: The forming roller group (3) comprises two symmetrically distributed conical rollers (31), and the large-diameter ends of the two conical rollers (31) are arranged close to each other so that the two guide vanes (401) are transported at intervals.

8. The method for preparing a transverse and longitudinal flow-guiding absorbent article according to claim 6, characterized in that: The forming roller group (3) comprises an upper forming convex roller (32) located at the top and a matching lower forming convex roller (33), wherein the lower forming convex roller (33) is located behind the upper forming convex roller (32), an upper convex portion (321) for folding down the adjacent ends of the two guide plates (401) is provided at the axial center of the upper forming convex roller (32), and a lower convex portion (331) for folding the folding position upward and inward is provided at the axial center of the lower forming convex roller (33).

9. The method for preparing a transverse and longitudinal flow-guiding absorbent article according to claim 6, characterized in that: A punching roller group (2) for punching holes in the two guide plates (401) to form the transverse guide portion (403) is provided at the front end or the rear end of the forming mechanism.

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