Novel transverse ultrathin absorption article
By improving the structure of absorbed items, the non-woven layer is eliminated, and a three-dimensional absorption structure of the peak groove and valley groove extending along the longitudinal direction is solved, and the existing absorbed items production process is achieved, reducing the amount of material and improving the absorption effect.
Patent Information
- Application Number
- CN202420531445.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-19
AI Technical Summary
The production process of existing absorbent items is complicated, resulting in an increase in material usage and low core utilization.
A new type of transverse ultra-thin absorbent article is designed, and the structure of the first absorbent body is improved by eliminating the non-woven layer and improving the structure of the first absorbent body, so that the first non-woven layer and the second non-woven layer form a three-dimensional absorbent structure of the peak groove and the trough groove extending in the longitudinal direction, thereby increasing the liquid infiltration space and the surface area of the polymer water-absorbing resin layer.
The amount of material is reduced, the utilization rate and absorption effect of the polymer water-absorbing resin layer is improved, the cost of material consumption is reduced, and the production process is simplified.
Smart Images
Figure CN222566135U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of disposable sanitary products, in particular to a novel transverse ultra-thin absorbent article. Background Art
[0002] In the current absorbent article structure, in order to ensure the absorption capacity of the absorbent core, there is usually a certain requirement for the amount of liquid absorbent material inside it, and the appearance needs to have a certain thickness to ensure this functional requirement. The applicant has a prior application CN 219021947 As shown in U, an absorbent article with a three-dimensional absorbent body is provided, comprising a liquid-permeable surface layer, an absorbent core layer and a liquid-impermeable bottom layer stacked from top to bottom, the absorbent core layer comprises a first absorbent body, the first absorbent body comprises a first non-woven fabric layer, a second non-woven fabric layer and a supporting non-woven fabric layer stacked from top to bottom, a plurality of linear elastic members are arranged between the first non-woven fabric layer and the second non-woven fabric layer, the linear elastic members are bonded and fixed to the first non-woven fabric layer and the second non-woven fabric layer, a polymer water-absorbing resin layer is sandwiched between the first non-woven fabric layer and the second non-woven fabric layer, and when the linear elastic members are bonded, they are in an elastically stretched state; when the linear elastic members are bonded to the first non-woven fabric layer and the second non-woven fabric layer, the first non-woven fabric layer and the second non-woven fabric layer are retracted by the linear elastic members to form a wavy structure with continuously staggered peak grooves and trough grooves, and the supporting non-woven fabric layer is bonded to each of the trough grooves. In this technical solution, the wavy three-dimensional structure formed can reduce the material consumption and improve the core utilization and absorption rate while ensuring the thickness; however, in this structure, the product needs to carry non-woven fabric to fix the first absorbent body during production, and the molding process is complicated, requiring further optimization of the production process. Utility Model Content
[0003] Therefore, the utility model provides a novel transverse ultra-thin absorbent article, which solves the problem of complicated production process of the currently used wave-shaped absorbent body.
[0004] In order to achieve the above object, the utility model is realized by the following technical solutions:
[0005] A novel transverse ultra-thin absorbent article comprises a liquid-permeable surface layer, an absorbent core layer and a liquid-impermeable bottom layer stacked from top to bottom, and the absorbent article is defined as having a longitudinal direction in the length direction and a transverse direction in the width direction, the absorbent core layer comprises a first absorbent body, the first absorbent body comprises a first non-woven fabric layer, a second non-woven fabric layer stacked and a plurality of linear elastic members sandwiched between the first non-woven fabric layer and the second non-woven fabric layer, a polymer absorbent resin layer is arranged between each of the linear elastic members, and when the linear elastic members are bonded, they are in an elastically stretched state; when the linear elastic members are bonded to the first non-woven fabric layer and the second non-woven fabric layer, the first non-woven fabric layer and the second non-woven fabric layer are retracted by the linear elastic members to form a wavy structure with continuously staggered peak grooves and trough grooves in cross section, and each of the linear elastic members is arranged along the transverse extension of the absorbent article so that the peak grooves and trough grooves extend along the longitudinal direction of the absorbent article.
[0006] Preferably, the absorbent core layer further comprises a second absorbent body disposed at the lower end of the first absorbent body, and the second absorbent body comprises an outer covering layer and a liquid-absorbing material embedded in the outer covering layer.
[0007] Preferably, the first absorbent body is arranged at the center of the second absorbent body.
[0008] Preferably, the thickness of the first absorber is 1-3 times the thickness of the second absorber.
[0009] Preferably, a guide layer is provided between the liquid-permeable surface layer and the first absorbent body, the guide layer is fixedly connected to each crest groove, and a hollow groove is provided on the guide layer above each trough groove.
[0010] By adopting the above technical solution, the beneficial effects of the utility model are:
[0011] Based on the applicant's previous case, this technical solution improves the structure of the first absorbent body, eliminates the load-bearing non-woven fabric layer used to maintain the wavy structure of the first absorbent body, and further reduces the amount of material used. Structurally, after the existing elastomer is recovered, the first non-woven fabric layer and the second non-woven fabric layer form a three-dimensional absorption structure with crests and troughs extending longitudinally along the absorbent article. This structure has more space for liquid infiltration, and the surface area of the polymer water-absorbent resin layer increases with the formed crests and troughs, which has a good absorption effect and greatly improves the utilization rate of the polymer water-absorbent resin layer. At the same time, under the premise of thickening, the amount of material used for the polymer water-absorbent resin layer is reduced compared with the traditional structure, thereby reducing the material usage cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the unfolded structure of the absorbent article in Embodiment 1 of the utility model;
[0013] Figure 2 This is a schematic diagram of the stacked structure of the first embodiment of the utility model;
[0014] Figure 3 This is a structural schematic diagram of the molding process of the first absorbent body in the first embodiment of the utility model;
[0015] Figure 4 This is a schematic diagram of the stacking structure of the absorbent article according to the second embodiment of the utility model.
[0016] Figure numerals: 10, liquid-permeable surface layer; 11, middle piece; 12, side piece; 20, absorption core layer; 21, first absorbent body; 22, second absorbent body; 30, liquid-impermeable bottom layer; 40, guide layer; 41, hollow groove; 1, first non-woven fabric layer; 2, second non-woven fabric layer; 3, linear elastic member; 4, polymer water-absorbent resin layer; a, peak groove; b, trough groove. DETAILED DESCRIPTION
[0017] 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.
[0018] Embodiment 1
[0019] refer to Figures 1 to 3 A novel transverse ultra-thin absorbent article, taking a sanitary napkin as an example, comprises a liquid-permeable surface layer 10, an absorbent core layer 20 and a liquid-impermeable bottom layer 30 stacked from top to bottom, wherein the liquid-permeable surface layer 10 comprises a middle sheet 11 located in the center and side sheets 12 located on both sides;
[0020] The absorbent article is defined as having a longitudinal direction in the length direction and a transverse direction in the width direction. The absorbent core layer 20 includes a first absorbent body 21, and the first absorbent body 21 includes a first non-woven fabric layer 1, a second non-woven fabric layer 2 and a plurality of linear elastic members 3 sandwiched between the first non-woven fabric layer 1 and the second non-woven fabric layer 2. The linear elastic members 34 are spandex yarns, which are the main material of elastic rubber bands widely used in the production of sanitary products. A polymer water-absorbing resin layer 4 is arranged between each of the linear elastic members 3. When the linear elastic members 3 are bonded, they are in an elastically stretched state. When the linear elastic members 3 are bonded to the first non-woven fabric layer 1 and the second non-woven fabric layer 2, the first non-woven fabric layer 1 and the second non-woven fabric layer 2 are retracted by the linear elastic members 3 to form a wavy structure with continuously staggered peak grooves a and trough grooves b in cross section. Each of the linear elastic members 3 is arranged along the transverse extension of the absorbent article so that the peak grooves a and the trough grooves b extend along the longitudinal extension of the absorbent article. Based on the applicant's previous case, the present technical solution improves the structure of the first absorbent body 21, omits the load-bearing non-woven fabric layer used to maintain the wavy structure of the first absorbent body 21, and further reduces the amount of material used. Structurally, after the existing elastomer is recovered, the first non-woven fabric layer 1 and the second non-woven fabric layer 2 form a three-dimensional absorption structure with crest grooves a and trough grooves b extending longitudinally along the absorbent article. This structure has more space for liquid infiltration, and the surface area of the polymer water-absorbent resin layer 4 increases with the formation of crest grooves a and trough grooves b, which has a good absorption effect and greatly improves the utilization rate of the polymer water-absorbent resin layer 4. At the same time, under the premise of thickening, the amount of material used in the polymer water-absorbent resin layer 4 is reduced compared with the traditional structure, thereby reducing the material usage cost.
[0021] During production, the surfaces of the first non-woven fabric layer 1 and the second non-woven fabric layer 2 on the opposite side are coated with glue, and then the two are bonded to the linear elastic member 3 and rolled to fix them, so that the linear elastic member 3 is fully fixed to the first non-woven fabric layer 1 and the second non-woven fabric layer 2, and at this time the linear elastic member 3 is in a stretched state under stress; and under this structure, when the linear elastic member 3 rebounds without being stressed, the bonded first non-woven fabric layer 1 and the second non-woven fabric layer 2 will form wrinkles, thereby increasing the thickness of the material; the first non-woven fabric layer 1 and the second non-woven fabric layer 2 are subjected to the linear elastic member 3 to shrink to form a wavy structure, and after the polymer water-absorbent resin layer 4 is sandwiched, a three-dimensional core material with a certain thickness can be formed. It should be noted that the thickness of the polymer water-absorbent resin layer 4 should not be too large, and it is necessary to ensure that the linear elastic member 3 is firmly bonded to the first non-woven fabric layer 1 and the second non-woven fabric layer 2 and is sufficient to form a retracted structure.
[0022] The thickness described here is the distance from the upper end to the lower end of the wrinkle; and it should be noted that, affected by factors such as the amount of glue applied and the uniformity of distribution of the linear elastic member 3, the shapes of each crest groove a and trough groove b are not completely uniform, and the wavy description is only a rough description of the cross-sectional shape. Similar structures with reciprocating curves all fall into the wavy category described in this content.
[0023] Structurally, a guide layer 40 is provided between the liquid-permeable surface layer 10 and the first absorbent body 21. The guide layer 40 is fixedly connected to each crest groove a, and the guide layer 40 located above each trough groove b is provided with a hollow groove 41. The guide layer 40 is fixedly connected to the crest groove a, and during the diversion process, the body fluid will gradually seep further from the hollow groove 41 under the action of the guide layer 40 and fall into the trough groove b. This structure not only has the function of increasing the infiltration rate and rapid diversion, but also has a structural restriction effect after the trough groove b receives a large amount of unabsorbed body fluid. Compared with the traditional planar structure, it has a lateral restriction effect on the body fluid, thereby improving the anti-side leakage performance.
[0024] Embodiment 2
[0025] refer to Figure 4 Compared with the first embodiment, the absorbent core layer 20 further includes a second absorbent body 22 disposed at the lower end of the first absorbent body 21, and the second absorbent body 22 includes an outer covering layer and a liquid-absorbing material embedded in the outer covering layer. Among them, the first absorbent body 21 is a traditional absorption structure, which is mainly used to increase the overall absorbent amount of the absorbent core layer 20, and the liquid-absorbing material can be a combination of materials commonly used in hygiene products such as polymers and fluff pulp. Structurally, the first absorbent body 21 is disposed at the center of the second absorbent body 22; that is, the first absorbent body 21 forms a convex structure protruding from the center of the second absorbent body 22, which not only uses its three-dimensional space to increase the infiltration rate, but also the convex structure can contact the liquid in the first time, avoiding the situation where the liquid cannot be absorbed in time when the amount is large.
[0026] At the same time, in order to ensure comfort and material cost, the thickness of the first absorbent body 21 is 1-3 times the thickness of the second absorbent body 22, so as to reduce the overall thickness of the absorbent core layer 20 except the position of the first absorbent body 21.
[0027] In terms of product design, the technical solution has good versatility and can be applied to the production of an absolute part of sanitary products. For example, when the absorbent article is a sanitary napkin product, a single-layer or multi-layer first absorbent body 21 structure can be used for the production of sanitary products, which has good thickness and rapid penetration effects; when it is used in the production of diapers, pull-up pants and other products, a second absorbent body 22 can also be added under the structure of the first absorbent body 21 to increase the overall absorption capacity of the product. During use, it not only has the advantages of high absorption rate and fast infiltration rate of the first absorbent body 21, but also has the large absorption capacity of the traditional absorbent core; at the same time, the first absorbent body 21 can also be designed as a convex structure according to needs to meet the production of corresponding products.
[0028] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.
Claims
1. A novel transverse ultra-thin absorbent article, comprising a liquid-permeable surface layer (10), an absorbent core layer (20) and a liquid-impermeable bottom layer (30) stacked from top to bottom, wherein the absorbent article has a longitudinal direction and a transverse direction, and is characterized in that: The absorbent core layer (20) comprises a first absorbent body (21), the first absorbent body (21) comprising a first non-woven fabric layer (1), a second non-woven fabric layer (2) and a plurality of linear elastic members (3) sandwiched between the first non-woven fabric layer (1) and the second non-woven fabric layer (2), a polymer water-absorbing resin layer (4) being arranged between each of the linear elastic members (3), and when the linear elastic members (3) are bonded, they are in an elastically stretched state; when the linear elastic members (3) are bonded to the first non-woven fabric layer (1) and the second non-woven fabric layer (2), the first non-woven fabric layer (1) and the second non-woven fabric layer (2) are retracted by the linear elastic members (3) to form a wavy cross-sectional structure having continuously staggered peak grooves (a) and trough grooves (b), and each of the linear elastic members (3) is arranged along the transverse extension of the absorbent article so that the peak grooves (a) and the trough grooves (b) extend along the longitudinal extension of the absorbent article.
2. A novel transversely ultra-thin absorbent article according to claim 1, characterized in that: The absorbent core layer (20) further comprises a second absorbent body (22) arranged at the lower end of the first absorbent body (21), and the second absorbent body (22) comprises an outer covering layer and a liquid-absorbing material embedded in the outer covering layer.
3. A novel transversely ultra-thin absorbent article according to claim 2, characterized in that: The first absorbent body (21) is arranged at the center of the second absorbent body (22).
4. A novel transverse ultra-thin absorbent article according to claim 1, 2 or 3, characterized in that: The thickness of the first absorbent body (21) is 1 to 3 times the thickness of the second absorbent body (22).
5. A novel transverse ultra-thin absorbent article according to claim 1, 2 or 3, characterized in that: A guide layer (40) is provided between the liquid-permeable surface layer (10) and the first absorbent body (21); the guide layer (40) is fixedly connected to each wave crest groove (a); and a hollow groove (41) is provided on the guide layer (40) located above each wave trough groove (b).