Quick-permeation dry and comfortable composite surface layer

Abstract

A surface layer main body comprises a rapid infiltration layer, a connecting layer, a guiding and absorbing layer and a liquid sealing layer which are sequentially arranged from top to bottom, and fibers of the rapid infiltration layer are interwoven and arranged to form a plurality of tiny channels and pore networks, so that rapid penetration and transmission of liquid are facilitated; the connecting layer is formed by melting and bonding the first fiber layer and the second fiber layer during hot pressing and plays a role in connecting and bonding the absorption guiding layer and the rapid permeation layer, the absorption guiding layer is of a double-layer fiber web structure, liquid permeates into an upper-layer fiber web and is guided in the length direction of the upper-layer fiber web through the flow guiding grooves, and the rapid permeation layer is formed by the rapid permeation layer. The liquid seal layer is made of fine denier fibers, the fine denier fibers are small in pore size and permeate towards the direction of the lower layer fiber web, under the same thickness and volume, pores of the lower layer fiber web are few, liquid can rapidly penetrate through the lower layer fiber web, and the permeation speed of the liquid is increased, the liquid seal layer is composed of fine denier fibers, the fiber pores are small, and under the action of the pore effect and gravity, the liquid seal layer can permeate towards the lower layer fiber web. And the liquid is not easy to reversely seep towards the rapid seeping layer along the liquid sealing layer.

Description

Technical Field

[0001] The utility model relates to the technical field of non-woven fabrics, in particular to a fast-permeable and dry composite surface layer. Background Art

[0002] Non-woven fabrics are made of directional or random fibers and are a new generation of environmentally friendly materials. They are moisture-proof, breathable, flexible, lightweight, non-combustible, easy to decompose, non-toxic and non-irritating, colorful, low-priced, and recyclable. They are widely used in modern industry.

[0003] As people's quality of life improves, the requirements for personal hygiene products and medical supplies are getting higher and higher; traditional non-woven materials often have problems such as poor permeability, slow conduction speed, and obvious wetness when absorbing liquids, which seriously affects the user experience; therefore, the development of a non-woven material with high permeability, fast conduction, dryness and comfort has become a problem that needs to be solved urgently. Utility Model Content

[0004] In view of the technical defects existing in the background technology, the utility model proposes a fast-penetrating and dry composite surface layer, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] A fast-seepage and dry composite surface layer comprises a surface layer main body, wherein the surface layer main body comprises a fast-seepage layer, a connecting layer, an absorbent layer and a liquid-sealing layer arranged in sequence from top to bottom, a first fiber layer is provided on the end face of the fast-seepage layer facing the absorbent layer, a second fiber layer is provided on the absorbent layer facing the fast-seepage layer, the first fiber layer and the second fiber layer are bonded by hot pressing to form the connecting layer, the absorbent layer is a double-layer fiber web structure, comprising an upper fiber web and a lower fiber web, a guide groove is provided along the length direction of the upper fiber web, and a conical through hole penetrating along the thickness direction of the absorbent layer is provided between two adjacent guide grooves.

[0006] As an improvement of the above scheme, the fast-permeation layer is composed of ES fibers arranged in a vertical and horizontal interlaced manner, the denier of the ES fibers is 1.5-2.0D, and the fibers of the first fiber layer and the ES fibers on the fast-permeation layer close to the absorbent layer are arranged in an irregular shape.

[0007] As an improvement of the above solution, the fiber denier of the upper fiber web is 2.0D-4.0D, and the fibers of the second fiber layer are interwoven and arranged in an irregular shape with the end surface of the upper fiber web facing the fast-permeation layer.

[0008] As an improvement of the above solution, the fiber denier of the lower layer fiber web is 2.0D-4.0D, and the fiber denier of the upper layer fiber web is smaller than the fiber denier of the lower layer fiber web.

[0009] As an improvement of the above scheme, the conical through hole is arranged along the thickness direction of the upper fiber web and the lower fiber web, a first through hole is arranged corresponding to the thickness direction of the upper fiber web, and a second through hole is arranged corresponding to the thickness direction of the lower fiber web, and the diameter of the first through hole is smaller than the diameter of the second through hole.

[0010] As an improvement of the above scheme, the conical through holes are arranged at equal intervals along the length direction of the absorbent layer, the guide groove is penetrated in the upper fiber web, has a circular cross-section and extends along the length direction of the upper fiber web, and the arrangement direction of the conical through holes is parallel to the extension direction of the guide groove.

[0011] As an improvement of the above solution, the liquid sealing layer is composed of fine denier fibers arranged in a vertical and horizontal interlaced manner, the denier of the fine denier fibers is not greater than 1.0D, and a weak water-repellent layer is provided on the end surface of the liquid sealing layer facing the absorbent layer.

[0012] The beneficial effect of the utility model is that the fibers of the fast-permeation layer are interwoven to form a plurality of tiny channels and pore networks, which are beneficial to the rapid penetration and transmission of liquids. The first fiber layer and the second fiber layer are melt-bonded during hot pressing, which play a role in connecting and bonding the absorbent layer and the fast-permeation layer. In the absorbent layer, the fiber denier of the upper fiber web is less than the fiber denier of the lower fiber web. The liquid penetrates into the upper fiber web and is guided along the length direction of the upper fiber web through the guide groove, and at the same time penetrates toward the lower fiber web. Under the same thickness and volume, the pores of the lower fiber web are relatively small, and the liquid can quickly penetrate the lower fiber web, thereby accelerating the penetration speed of the liquid. The liquid sealing layer is composed of fine-denier fibers with relatively small fiber pores. Under the action of the pore effect and gravity, the liquid is not easy to reversely permeate along the liquid sealing layer toward the fast-permeation layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the surface layer main body of the utility model in an unfolded state.

[0014] Figure 2 It is a schematic diagram of the structure of the surface layer body in the thickness direction of the utility model.

[0015] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A.

[0016] Among them: surface layer body 1, quick-permeation layer 2, connecting layer 3, first fiber layer 301, second fiber layer 302, absorbent layer 4, upper fiber mesh 401, lower fiber mesh 402, liquid sealing layer 5, guide groove 6, tapered through hole 7, first through hole 701, second through hole 702, weak water-repellent layer 8. DETAILED DESCRIPTION

[0017] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0018] like Figures 1 to 3 As shown, a fast-seepage and dry composite surface layer comprises a surface layer main body 1, wherein the surface layer main body 1 comprises a fast-seepage layer 2, a connecting layer 3, an absorbent layer 4 and a liquid sealing layer 5 which are arranged in sequence from top to bottom, a first fiber layer 301 is provided on the end face of the fast-seepage layer 2 facing the absorbent layer 4, a second fiber layer 302 is provided on the side of the absorbent layer 4 facing the fast-seepage layer 2, the first fiber layer 301 and the second fiber layer 302 are formed by hot pressing to form the connecting layer 3, the absorbent layer 4 is a double-layer fiber web structure, comprising an upper fiber web 401 and a lower fiber web 402, a guide groove 6 is provided along the length direction of the upper fiber web 401, and a conical through hole 7 which is penetrated along the thickness direction of the absorbent layer 4 is provided between two adjacent guide grooves 6.

[0019] In the surface layer main body 1 structure of the utility model, the surface layer main body 1 is composed of a permeable layer, an absorbent layer 4 and a liquid sealing layer 5 stacked and hot-pressed, wherein the permeable layer and the absorbent layer 4 are hot-pressed to form the connecting layer 3, and the connecting layer 3 adheres and fixes the permeable layer and the absorbent layer 4, so that the two layers form a tight fit, ensuring that the permeable layer and the absorbent layer 4 will not separate or shift when subjected to external force or in use;

[0020] It should be noted that the connecting layer 3 includes a first fiber layer 301 and a second fiber layer 302, and the first fiber layer 301 and the second fiber layer 302 are both composed of low-melting-point polyamide fibers, which have the characteristics of low melting point, high thermal bonding strength, soft hand feel, and narrow melting range. A certain amount of low-melting-point polyamide fibers are interwoven on the opposite end surfaces between the rapid-permeation layer 2 and the absorbent layer 4. During hot pressing, the low-melting-point polyamide fibers flow in a molten state to the interweaving points between the ES fibers and the fibers of the upper fiber mesh 401, thereby tightly fitting the rapid-permeation layer 2 and the absorbent layer 4 to ensure that they will not separate or shift when subjected to external forces.

[0021] Furthermore, in the above scheme, the fast-permeation layer 2 is composed of ES fibers arranged in a vertical and horizontal interlaced manner, the denier of the ES fibers is 1.5-2.0D, the fibers of the first fiber layer 301 and the ES fibers on the side of the fast-permeation layer 2 close to the absorbent layer 4 are interlaced in an irregular shape, and the fibers of the second fiber layer 302 and the upper fiber web 401 are interlaced in an irregular shape toward the end face of the fast-permeation layer 2.

[0022] In the structure of the absorbent layer 4 of the utility model, the absorbent layer 4 is a double-layer fiber mesh structure, the fiber denier of the upper fiber mesh 401 is 2.0D-4.0D, and the fiber denier of the lower fiber mesh 402 is 2.0D-4.0D. The fiber denier of the upper fiber mesh 401 is smaller than that of the lower fiber mesh 402. When the thickness of the upper fiber mesh 401 and the lower fiber mesh 402 are the same, the upper fiber mesh 401 has a denser fiber network and a smaller fiber gap relative to the lower fiber mesh 402. When the liquid penetrates the upper fiber mesh 401, it needs to pass through more tortuous paths, and the contact area with the fibers is also larger, and the penetration speed is lower than the penetration speed of the lower fiber mesh 402.

[0023] It should be noted that the fiber gaps of the lower fiber mesh 402 are larger than the fiber gaps of the upper fiber mesh 401, and the liquid penetration rate in the lower fiber mesh 402 is greater than the penetration rate of the upper fiber mesh 401. Therefore, when the liquid penetrates downward along the absorbent layer 4, the upper fiber mesh 401 guides the liquid, and the liquid is guided along the length direction of the guide groove 6 in the upper fiber mesh 401 and penetrates downward along the fiber gaps. When the amount of liquid is large, the conical through hole 7 assists the penetration and helps the liquid to penetrate directly downward along the through hole to avoid liquid retention.

[0024] Furthermore, in the above scheme, the conical through hole 7 is penetrated along the thickness direction of the upper fiber web 401 and the lower fiber web 402, and a first through hole 701 is provided corresponding to the thickness direction of the upper fiber web 401, and a second through hole 702 is provided corresponding to the thickness direction of the lower fiber web 402. The diameter of the first through hole 701 is smaller than the diameter of the second through hole 702. The conical through hole 7 has a certain anti-reverse osmosis effect, and the liquid can easily penetrate from the upper fiber web 401 to the lower fiber web 402, but cannot easily penetrate from the lower fiber web 402 to the upper fiber web 401.

[0025] Furthermore, in the above scheme, the conical through holes 7 are arranged at equal intervals along the length direction of the absorbent layer 4, the guide groove 6 is penetrated in the upper fiber mesh 401, has a circular cross-section and extends along the length direction of the upper fiber mesh 401, and the arrangement direction of the conical through holes 7 is parallel to the extension direction of the guide groove 6.

[0026] Furthermore, in the above scheme, the liquid sealing layer 5 is composed of fine denier fibers arranged in a vertical and horizontal interlaced manner, the denier of the fine denier fibers is not greater than 1.0D, and the fiber pores of the liquid sealing layer 5 formed by the interlacing of fine denier fibers are smaller than the fiber pores of the absorbent layer 4. Due to the difference in fiber pores between the absorbent layer 4 and the liquid sealing layer 5, the liquid that penetrates through the liquid sealing layer 5 from the absorbent layer 4 is not easy to flow back, and a weak water-repellent layer 8 is provided on the end face of the liquid sealing layer 5 facing the absorbent layer 4 to further improve the anti-backseepage effect of this layer.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A fast-seeping and dry composite surface layer, characterized in that: The surface layer body (1) comprises a quick-permeation layer (2), a connecting layer (3), an absorbent layer (4) and a liquid sealing layer (5) which are arranged in sequence from top to bottom; a first fiber layer (301) is provided on the end surface of the quick-permeation layer (2) facing the absorbent layer (4); a second fiber layer (302) is provided on the side of the absorbent layer (4) facing the quick-permeation layer (2); the first fiber layer (301) and the second fiber layer (302) are bonded by heat pressing to form the connecting layer (3); the absorbent layer (4) is a double-layer fiber web structure, comprising an upper fiber web (401) and a lower fiber web (402); a flow guide groove (6) is provided along the length direction of the upper fiber web (401); and a tapered through hole (7) is provided between two adjacent flow guide grooves (6) and is penetrated along the thickness direction of the absorbent layer (4).

2. The fast-seeping and dry composite surface layer according to claim 1, characterized in that: The fast-permeation layer (2) is composed of ES fibers arranged in a vertical and horizontal interlaced manner, the denier of the ES fibers is 1.5-2.0D, and the fibers of the first fiber layer (301) and the ES fibers on the side of the fast-permeation layer (2) close to the absorbent layer (4) are arranged in an irregular interlaced shape.

3. The fast-seeping and dry composite surface layer according to claim 1, characterized in that: The fiber denier of the upper fiber web (401) is 2.0D-4.0D, and the fibers of the second fiber layer (302) are interwoven and arranged in an irregular shape with the end surface of the upper fiber web (401) facing the fast-permeation layer (2).

4. The fast-seeping and dry composite surface layer according to claim 1, characterized in that: The fiber denier of the lower layer fiber web (402) is 2.0D-4.0D, and the fiber denier of the upper layer fiber web (401) is smaller than the fiber denier of the lower layer fiber web (402).

5. The fast-seeping and dry composite surface layer according to claim 1, characterized in that: The conical through hole (7) is arranged along the thickness direction of the upper fiber web (401) and the lower fiber web (402); a first through hole (701) is arranged in the thickness direction of the upper fiber web (401); a second through hole (702) is arranged in the thickness direction of the lower fiber web (402); the diameter of the first through hole (701) is smaller than the diameter of the second through hole (702).

6. The fast-seeping and dry composite surface layer according to claim 1, characterized in that: The conical through holes (7) are arranged at equal intervals along the length direction of the guide layer (4); the guide groove (6) is arranged in the upper fiber mesh (401), has a circular cross-section and extends along the length direction of the upper fiber mesh (401); and the arrangement direction of the conical through holes (7) is parallel to the extension direction of the guide groove (6).

7. The fast-permeable and dry composite surface layer according to claim 1, characterized in that: The liquid sealing layer (5) is composed of fine denier fibers arranged in a vertical and horizontal interlaced manner, the fine denier fibers having a denier of no more than 1.0D, and a weak water-repellent layer (8) is provided on the end surface of the liquid sealing layer (5) facing the absorbent layer (4).

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