Surface layer / diversion layer non-woven fabric for absorbing thick body fluid
By incorporating perforations and a rolled fiber layer into the nonwoven fabric surface, the problem of difficulty in penetrating loose stools and menstrual blood clots in baby diapers and feminine hygiene products is solved, improving user comfort and storage performance.
Patent Information
- Application Number
- CN202520164036.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-23
AI Technical Summary
The surface pores of existing baby diapers and feminine hygiene products are small, making it difficult for loose stools and menstrual blood clots to penetrate, causing discomfort to users.
Design a nonwoven fabric for absorbing viscous bodily fluids, with an open porosity of 10%-30%, using first and second fiber layers of different fineness, and forming holes through hot air treatment. The hole shapes are circular, rectangular, etc. The fiber layers have a crimp of 30%-50%. The first fiber is 2-6D ES fiber, and the second fiber is 6-15D ES fiber. The fiber layers are composited to form the nonwoven fabric base layer.
It improves the penetration of loose stools and menstrual clots, enhances the user experience, and achieves drainage and storage effects through the fluffiness of the curled fiber layer.
Smart Images
Figure CN223835186U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a nonwoven fabric for the surface / flow guiding layer that absorbs thick body fluids, belonging to the field of nonwoven fabric technology. Background Technology
[0002] Baby diapers and feminine hygiene products are currently very common products. When babies have loose stools or women experience menstrual blood clots, the small pores in the surface of regular baby diapers and feminine hygiene products allow some of the stool and blood clots to remain in contact with the skin, causing discomfort and affecting the user experience. Therefore, developing a nonwoven fabric for the surface / distribution layer that can absorb thick bodily fluids for use as the surface or distribution layer of baby diapers and feminine hygiene products has become a problem to be solved. Utility Model Content
[0003] The purpose of this invention is to provide a nonwoven fabric for the surface / flow-guiding layer that absorbs thick bodily fluids, with perforations that allow loose stools or blood clots to penetrate into the absorbent layer.
[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:
[0005] The present invention relates to a nonwoven fabric for absorbing viscous body fluids, comprising a nonwoven base layer, wherein the nonwoven base layer has cut holes with an opening rate of 10%-30%.
[0006] The nonwoven base layer includes a first fiber layer and a second fiber layer that are composite; the fineness of the first fiber used in the first fiber layer is less than the fineness of the second fiber used in the second fiber layer.
[0007] The second fiber has a crimp of 30%-50%.
[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the first fiber is 2-6D ES fiber, and the second fiber is 6-15D ES fiber; the ES fiber includes a sheath layer and a core layer; the sheath layer is PE, and the core layer is PP or PET.
[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the shape of the cut hole is circular, rectangular, rhomboid, elliptical, triangular, pentagonal, or polygonal.
[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the surface density of the nonwoven base layer is 20-60 grams per square meter.
[0011] Based on the above scheme and as a preferred embodiment of the above scheme: the areal density of the first fiber layer accounts for one-third to one-half of the areal density of the nonwoven fabric base.
[0012] The beneficial effects of this invention are as follows: The nonwoven fabric with absorbent surface / flow-guiding layer that absorbs thick bodily fluids has perforations that allow loose stools from infants or menstrual blood clots from women to pass through, thereby improving the user experience of baby diapers or women's menstrual hygiene products. Furthermore, the second fiber layer uses fibers with a degree of crimp, which increases its fluffiness and helps to guide and store loose stools. Attached Figure Description
[0013] Figure 1 This is a schematic cross-sectional view of the nonwoven fabric for absorbing viscous body fluids in Example 1.
[0014] Figure 2 This is a top view schematic diagram of the nonwoven fabric surface / flow guiding layer that absorbs thick body fluids according to Example 1;
[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of ES fiber. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0017] Example 1
[0018] Combination Figure 1 , Figure 2 and Figure 3 This embodiment provides a detailed description. The nonwoven fabric used in this embodiment for absorbing viscous bodily fluids, comprising a nonwoven base layer 1, on which perforations 4 are formed, with an opening ratio of 10%-30%. The opening ratio is the ratio of the area of the perforations 4 to the area of the nonwoven base layer 1. A lower opening ratio hinders the penetration of loose stools or blood clots, while a higher opening ratio reduces the strength of the nonwoven base layer. In this embodiment, an opening ratio of 20% is selected.
[0019] The nonwoven base layer 1 comprises a first fiber layer 2 and a second fiber layer 3, which are composite. The fineness of the first fiber used in the first fiber layer 2 is less than the fineness of the second fiber used in the second fiber layer 3. The second fiber has a crimp of 30%-50%, and in this embodiment, the crimp is selected as 40%. The crimp refers to the difference between the length of the straightened fiber and the length of the crimped fiber, and the ratio of this difference to the length of the straightened fiber is the crimp. The first fiber is a conventional fiber with no crimp or a small crimp.
[0020] Furthermore, the first fiber is a 2-6D ES fiber, and the second fiber is a 6-15D ES fiber; the ES fiber includes a sheath layer 11 and a core layer 12; the sheath layer 11 is PE, and the core layer 12 is PP or PET. Specifically, in this embodiment, the fineness of the first fiber is 3D, and the fineness of the second fiber is 9D. Of course, the fineness of the first and second fibers can also be selected according to actual needs. In this embodiment, the core layer 12 of the ES fiber used is PET.
[0021] The first and second fibers are combed into fiber webs, stacked, and then subjected to hot air treatment to melt the PE in the skin layer 11, thereby bonding the fibers in the fiber web to form a nonwoven fabric.
[0022] Furthermore, the shape of the cut hole 4 can be circular, rectangular, rhomboid, elliptical, triangular, pentagonal, or polygonal, or other shapes. In this embodiment, a circular shape is used as an example. The diameter of the cut hole 4 is between 3mm and 10mm. The cut hole 4 is formed by cutting with a tool, and the edges of the cut hole 4 are not tightly compressed. Traditionally, holes are formed on the surface of nonwoven fabric using a hot-pressing roller, but the edges of holes formed in this way usually become tight due to heat and pressure, thus affecting the permeability of the nonwoven fabric layer.
[0023] Furthermore, the areal density of the nonwoven base layer 1 is 20-60 grams per square meter. The areal density of the first fiber layer 2 accounts for one-third to one-half of the areal density of the nonwoven base layer 1. Specifically, in this embodiment, it is selected as 40 grams per square meter, and the areal density of the first fiber layer 2 is 15 grams per square meter. Of course, the areal density of the nonwoven base layer 1 can also be selected according to actual needs. The thickness of the nonwoven base layer 1 is 2-5 mm. In this embodiment, the thickness of the 40 grams per square meter nonwoven base layer is about 3 mm, making the nonwoven fabric relatively fluffy.
[0024] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. A nonwoven fabric for a surface / flow-guiding layer that absorbs viscous bodily fluids, characterized in that, Includes a non-woven fabric base layer (1), wherein the non-woven fabric base layer (1) has cut holes (4) with an opening rate of 10%-30%; The nonwoven base layer (1) includes a first fiber layer (2) and a second fiber layer (3) that are composite; the fineness of the first fiber used in the first fiber layer (2) is less than the fineness of the second fiber used in the second fiber layer (3); The second fiber has a crimp of 30%-50%.
2. The nonwoven fabric for absorbing viscous bodily fluids in a surface / flow-guiding layer according to claim 1, characterized in that, The first fiber is a 2-6D ES fiber, and the second fiber is a 6-15D ES fiber; the ES fiber includes a sheath (11) and a core layer (12); the sheath (11) is PE, and the core layer (12) is PP or PET.
3. The nonwoven fabric for absorbing viscous bodily fluids in a surface / flow-guiding layer according to claim 1, characterized in that, The shape of the cut hole (4) is circular, rectangular, rhomboid, elliptical, triangular or pentagonal.
4. The nonwoven fabric for absorbing viscous bodily fluids in a surface / flow-guiding layer according to claim 1, characterized in that, The surface density of the nonwoven base layer (1) is 20-60 grams per square meter.
5. The nonwoven fabric for absorbing viscous bodily fluids in a surface / flow-guiding layer according to claim 4, characterized in that, The areal density of the first fiber layer (2) is one-third to one-half of the areal density of the nonwoven base layer (1).