CN110699851A - Nonwoven fabric for diaper surface layer - Google Patents

Nonwoven fabric for diaper surface layer Download PDF

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Publication number
CN110699851A
CN110699851A CN201911116300.5A CN201911116300A CN110699851A CN 110699851 A CN110699851 A CN 110699851A CN 201911116300 A CN201911116300 A CN 201911116300A CN 110699851 A CN110699851 A CN 110699851A
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woven fabric
fabric layer
liquid
layer
guiding
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CN110699851B (en
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曾俊卿
胡爱民
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Jiangxi An Apple Industry Co Ltd
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Jiangxi An Apple Industry Co Ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C23/00—Making patterns or designs on fabrics
    • D06C23/04—Making patterns or designs on fabrics by shrinking, embossing, moiréing, or crêping
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/06—Inorganic compounds or elements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M17/00—Producing multi-layer textile fabrics

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

The invention discloses a non-woven fabric for a diaper surface layer, which is formed by sequentially overlapping a skin-friendly non-woven fabric layer, a liquid-guiding non-woven fabric layer and a hydrophilic non-woven fabric layer from top to bottom, wherein a plurality of groups of diversion trenches are uniformly arranged on the liquid-guiding non-woven fabric layer, and the diversion trenches are semi-closed trenches which are not through from top to bottom; the bottom of the hydrophilic non-woven fabric layer is provided with a plurality of groups of convex bodies, and the convex bodies are rolling points formed by hot rolling the hydrophilic non-woven fabric layer; the skin-friendly non-woven fabric layer and the liquid-guiding non-woven fabric layer are subjected to high-temperature oscillation fiber opening treatment. The invention adopts a multi-layer non-woven fabric composite structure, and carries out high-temperature oscillation fiber splitting treatment on the skin-friendly non-woven fabric layer and the liquid-guiding non-woven fabric layer, so that the fiber spacing is increased, the water permeability and the air permeability are increased, and simultaneously, the flow guide performance of the liquid-guiding non-woven fabric layer and the anti-seepage performance of the hydrophilic non-woven fabric layer are optimized, and further, the integral water permeability, air permeability and anti-back seepage performance are optimized.

Description

Nonwoven fabric for diaper surface layer
Technical Field
The invention belongs to the technical field of infant hygiene, and particularly relates to a non-woven fabric for a diaper surface layer.
Background
The diaper surface layer is a surface layer directly contacted with the skin of an infant, which is the beginning of the excrement absorption process, the non-woven fabric is formed by forming a fiber web structure by orienting or randomly arranging textile short fibers or filaments and then reinforcing the fiber web structure by adopting a mechanical method, a thermal bonding method or a chemical method and the like, and has the advantages of no generation of fiber scraps, toughness, durability, air permeability, water permeability, softness, low cost and the like, and the non-woven fabric is usually used as the diaper surface layer.
For the diaper surface layer, the indexes for measuring the quality of the diaper surface layer are mainly represented by the following points: the surface layer of the diaper mainly plays a role in guiding urine to the absorption core layer, and the water permeability is required to be far greater than the liquid absorption amount; because the surface layer of the diaper is directly contacted with the skin, the air permeability is a factor influencing the comfort and the health of a user; the rewet amount refers to the amount of liquid that is rewet when external force is applied or the use time is too long. Since diapers are disposable products for infants, there is a need for a nonwoven fabric having good water and air permeability and being less likely to be rewet as a surface layer of the diaper.
Disclosure of Invention
Aiming at the defects and difficulties in the prior art, the invention aims to provide a non-woven fabric for a diaper surface layer.
The invention is realized by the following technical scheme:
the non-woven fabric for the surface layer of the diaper is formed by sequentially overlapping a skin-friendly non-woven fabric layer, a liquid-guiding non-woven fabric layer and a hydrophilic non-woven fabric layer from top to bottom, wherein a plurality of groups of flow guide grooves are uniformly arranged on the liquid-guiding non-woven fabric layer, and the flow guide grooves are semi-closed grooves which are not through from top to bottom; the bottom of the hydrophilic non-woven fabric layer is provided with a plurality of groups of convex bodies, and the convex bodies are rolling points formed by hot rolling the hydrophilic non-woven fabric layer; the skin-friendly non-woven fabric layer and the liquid-guiding non-woven fabric layer are subjected to high-temperature oscillation fiber opening treatment, and the fiber opening treatment step comprises the following steps:
(1) arranging the non-woven fabrics of the skin-friendly non-woven fabric layer and the liquid-guiding non-woven fabric layer in an oscillator for oscillation, adding a fiber-opening agent solution into the oscillator, increasing the temperature from 20-30 ℃ to 60-80 ℃ in the oscillation process for 10-15 min, and then continuing for 15-30 min at the constant temperature of 60-80 ℃;
(2) washing the non-woven fabric treated in the step (1) at a constant temperature, and washing the non-woven fabric with clear water at a constant temperature of 50-80 ℃ until the non-woven fabric is neutral;
(3) soaking the non-woven fabric cleaned in the step (2) in a medical antibacterial liquid and carrying out oscillation treatment, wherein the oscillation time is 1-3 min and the oscillation temperature is 40-60 ℃;
(4) and (4) washing the surface of the non-woven fabric treated in the step (3) by flowing water, and drying.
Further, the diversion trench is wavy along the drainage non-woven fabric layer flat surface.
Furthermore, the diversion trench is of a tapered structure with a wide upper part and a narrow lower part along the section of the liquid guide non-woven fabric layer.
Further, ultrasonic oscillation is adopted for the oscillation in the step (1) and the step (3).
Furthermore, the number of the liquid guide non-woven fabric layers is more than two, and the diversion grooves on the adjacent liquid guide non-woven fabric layers are distributed in a mutually staggered manner.
Furthermore, the thickness of the skin-friendly non-woven fabric layer and the thickness of the hydrophilic non-woven fabric layer are not more than 1 mm.
Further, the depth of the diversion trench is not less than 1/2 of the thickness of the liquid guide non-woven fabric layer.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts a multi-layer non-woven fabric composite structure, and carries out high-temperature oscillation fiber splitting treatment on the skin-friendly non-woven fabric layer and the liquid-guiding non-woven fabric layer, so that the fiber spacing is increased, the water permeability and the air permeability are increased, and simultaneously, the flow guide performance of the liquid-guiding non-woven fabric layer and the anti-seepage performance of the hydrophilic non-woven fabric layer are optimized, and further, the integral water permeability, air permeability and anti-back seepage performance are optimized.
(2) The invention carries out high-temperature oscillation fiber splitting treatment on the skin-friendly non-woven fabric layer and the liquid-guiding non-woven fabric layer, so that the internal fibers of the non-woven fabric layer become superfine fibers and have more micro pores, and fiber capillaries are added, so that the water permeability and the air permeability are better, and meanwhile, the fiber structure is tighter and the back seepage can be further prevented.
(3) The wavy diversion trench is arranged on the liquid guide non-woven fabric layer, so that the liquid contact area is increased, the effect of uniform diversion is achieved, the liquid permeation speed is increased, and meanwhile, the structure of the liquid guide non-woven fabric layer is more tortuous and roundabout due to the diversion trench, the liquid can be prevented from rising, and the back permeation quantity is reduced.
(4) The invention carries out antibacterial treatment while opening fiber, so that the medical antibacterial liquid permeates into the fiber, and the antibacterial effect of the medical antibacterial liquid is improved.
(5) The direct base surface of the hydrophilic non-woven fabric layer and the absorption core layer is a convex surface, when liquid is guided to the absorption core layer through the surface layer, if the liquid is upwards infiltrated due to the action of external force, the outer convex body is formed by hot rolling, on one hand, the outer convex body is more compact and has larger thickness, and on the other hand, the outer convex three-dimensional structure prevents the liquid from being infiltrated.
(6) The oscillation in the fiber opening treatment of the invention adopts ultrasonic oscillation, the fiber opening effect is obvious and the fiber of the non-woven fabric is not damaged.
Drawings
FIG. 1 is a schematic diagram of the layered structure of the present invention.
FIG. 2 is a schematic top view of a liquid-permeable nonwoven fabric layer according to the present invention.
Illustration of the drawings: 1-skin-friendly non-woven fabric layer, 2-liquid-conducting non-woven fabric layer, 3-convex body, 4-hydrophilic non-woven fabric layer and 5-diversion trench.
In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, and integrally connected; can be mechanical connection and electrical connection; may be directly connected, indirectly connected through intervening agents, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be specifically understood by those of ordinary skill in the art.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Example one
As shown in figure 1, the non-woven fabric for the surface layer of the diaper is formed by sequentially overlapping a skin-friendly non-woven fabric layer 1, a liquid-guiding non-woven fabric layer 2 and a hydrophilic non-woven fabric layer 4 from top to bottom, wherein the skin-friendly non-woven fabric layer 1 is a surface layer directly contacted with the skin, the liquid-guiding non-woven fabric layer 2 is a surface layer which quickly guides urine downwards and simultaneously prevents the urine from back seepage, the hydrophilic non-woven fabric layer 4 is a surface layer directly contacted with an absorption core layer (a core layer for absorbing the urine in the diaper), a hydrophilic agent is added in the conventional non-woven fabric production process, or the hydrophilic agent is added on fibers in the fiber production process to produce the non-woven fabric, and the hydrophilic non-woven fabric layer 4. The thickness of the skin-friendly non-woven fabric layer 1 and the thickness of the hydrophilic non-woven fabric layer 4 are not more than 1mm, the thickness limitation of the skin-friendly non-woven fabric layer 1 is to ensure the air permeability, and the thickness limitation of the hydrophilic non-woven fabric layer 4 is to ensure the permeability.
The water permeability, gas permeability, prevent that the back permeability index is relevant with non-woven fabrics self structure, like the aperture of non-woven fabrics mesh, fibre specific surface area, fibre interval etc. however, the water permeability is inconsistent with the gas permeability, prevent that the back permeability all requires the large aperture to structural performance, and prevent that the back permeability requires little aperture, adopts the compound non-woven fabrics of multilayer with the non-woven fabrics for the diaper top layer, optimizes each layer performance, and then optimizes holistic water permeability, gas permeability, prevents the back permeability performance.
As shown in fig. 2, a plurality of sets of flow guide grooves 5 are uniformly formed on the liquid-guiding nonwoven fabric layer 2, the flow guide grooves 5 are semi-enclosed grooves which are not through from top to bottom, and the depth of the flow guide grooves 5 is not less than 1/2 of the thickness of the liquid-guiding nonwoven fabric layer 2, so as to ensure the flow guide effect. Guiding gutter 5 guarantees its effective area and scope for the wave along leading 2 plain noodles on liquid non-woven fabrics layer, guiding gutter 5 is narrow toper structure about wide along leading 2 tangent planes on liquid non-woven fabrics layer, be favorable to the water conservancy diversion to reduce the backward flow simultaneously, guiding gutter 5 has increased liquid area of contact, and play the even effect of water conservancy diversion, increase liquid permeation speed, simultaneously guiding gutter 5 makes the structure of leading liquid non-woven fabrics layer 2 circuitous more, can hinder liquid and rise, thereby reduce the rewet volume.
The skin-friendly non-woven fabric layer 1 and the drainage non-woven fabric layer 2 are subjected to fiber splitting treatment, so that the fiber spacing is increased, the water permeability and the air permeability are increased, and the specific fiber splitting treatment steps are as follows:
(1) immersing the non-woven fabric in 6g/l NaOH solution in an oscillator, oscillating, increasing the temperature from room normal temperature to 60 ℃ after 10min, and continuing for 30min at the constant temperature of 60 ℃, so that the internal fiber of the non-woven fabric becomes superfine fiber, has more micro pores, increases fiber capillary tubes, has better water permeability and air permeability, and simultaneously ensures that the fiber structure is more compact and can further prevent rewet;
(2) washing the non-woven fabric treated in the step (1) at constant temperature, and washing the non-woven fabric with clear water at the constant temperature of 50 ℃ until the non-woven fabric is neutral;
(3) soaking the cleaned non-woven fabric in the step (2) in a medical antibacterial liquid and carrying out oscillation treatment, wherein the oscillation time is 1min, the oscillation temperature is 40 ℃, and the antibacterial treatment is carried out while fiber opening is carried out, so that the medical antibacterial liquid permeates into fibers and optimizes the antibacterial effect of the fibers, and the medical antibacterial liquid is an antibacterial liquid allowed to be used in the field;
(4) and (4) quickly cleaning the surface of the non-woven fabric treated in the step (3) by using flowing water to ensure that the surface is clean, and drying.
Example two
As shown in figure 1, the non-woven fabric for the surface layer of the diaper is formed by sequentially overlapping a skin-friendly non-woven fabric layer 1, two liquid-guiding non-woven fabric layers 2 and a hydrophilic non-woven fabric layer 4 from top to bottom, wherein the thicknesses of the skin-friendly non-woven fabric layer 1 and the hydrophilic non-woven fabric layer 4 are not more than 0.8 m.
The skin-friendly non-woven fabric layer 1 and the drainage non-woven fabric layer 2 are subjected to fiber splitting treatment, so that the fiber spacing is increased, the water permeability and the air permeability are increased, and the specific fiber splitting treatment steps are as follows:
(1) immersing the non-woven fabric in 8g/l NaOH solution in an ultrasonic oscillator, performing ultrasonic oscillation, increasing the temperature from room temperature to 65 ℃ within 12min in the oscillation process, and continuing for 28min at the constant temperature of 65 ℃;
(2) washing the non-woven fabric treated in the step (1) at constant temperature, and washing the non-woven fabric with clear water at the constant temperature of 60 ℃ until the non-woven fabric is neutral;
(3) soaking the cleaned non-woven fabric in the step (2) in a medical antibacterial liquid and carrying out oscillation treatment, wherein the oscillation time is 1.5min and the oscillation temperature is 50 ℃;
(4) and (4) rapidly cleaning the surface of the non-woven fabric treated in the step (3) by using flowing water, and drying.
As shown in fig. 2, a plurality of sets of flow guide grooves 5 are uniformly arranged on the liquid-guiding non-woven fabric layer 2, the flow guide grooves 5 are semi-closed grooves which are not through from top to bottom, the depth of the flow guide grooves 5 is not less than 1/2 of the thickness of the liquid-guiding non-woven fabric layer 2, the flow guide grooves 5 are wavy along the flat surface of the liquid-guiding non-woven fabric layer 2 and have a tapered structure with a wide top and a narrow bottom along the section of the liquid-guiding non-woven fabric layer 2, and the flow guide grooves 5 on adjacent liquid-guiding non-woven fabric layers 2 are distributed.
As shown in fig. 1, the hydrophilic nonwoven fabric layer 4 is provided at the bottom thereof with a plurality of sets of protrusions 3, and the protrusions 3 are formed by hot rolling the hydrophilic nonwoven fabric layer 4.
EXAMPLE III
As shown in figure 1, the non-woven fabric for the surface layer of the diaper is formed by sequentially overlapping a skin-friendly non-woven fabric layer 1, a three-layer liquid-guiding non-woven fabric layer 2 and a hydrophilic non-woven fabric layer 4 from top to bottom, wherein the thicknesses of the skin-friendly non-woven fabric layer 1 and the hydrophilic non-woven fabric layer 4 are not more than 0.5 m.
The skin-friendly non-woven fabric layer 1 and the drainage non-woven fabric layer 2 are subjected to fiber splitting treatment, so that the fiber spacing is increased, the water permeability and the air permeability are increased, and the specific fiber splitting treatment steps are as follows:
(1) immersing the non-woven fabric in 10g/l NaOH solution in an ultrasonic oscillator, performing ultrasonic oscillation, increasing the temperature from room normal temperature to 80 ℃ within 15min in the oscillation process, and continuing for 25min at the constant temperature of 80 ℃;
(2) washing the non-woven fabric treated in the step (1) at constant temperature, and washing the non-woven fabric with clear water at the constant temperature of 80 ℃ until the non-woven fabric is neutral;
(3) soaking the cleaned non-woven fabric in the step (2) in a medical antibacterial liquid and carrying out oscillation treatment, wherein the oscillation time is 3min and the oscillation temperature is 60 ℃;
(4) and (4) rapidly cleaning the surface of the non-woven fabric treated in the step (3) by using flowing water, and drying.
As shown in fig. 2, a plurality of sets of flow guide grooves 5 are uniformly arranged on the liquid-guiding non-woven fabric layer 2, the flow guide grooves 5 are semi-closed grooves which are not through from top to bottom, the depth of the flow guide grooves 5 is not less than 1/2 of the thickness of the liquid-guiding non-woven fabric layer 2, the flow guide grooves 5 are wavy along the flat surface of the liquid-guiding non-woven fabric layer 2 and have a tapered structure with a wide top and a narrow bottom along the section of the liquid-guiding non-woven fabric layer 2, and the flow guide grooves 5 on adjacent liquid-guiding non-woven fabric layers 2 are distributed.
As shown in fig. 1, the hydrophilic nonwoven fabric layer 4 is provided at the bottom thereof with a plurality of sets of protrusions 3, and the protrusions 3 are formed by hot rolling the hydrophilic nonwoven fabric layer 4.
The reason why the highest temperature of 60-80 ℃ is adopted in the step (1) of the opening treatment of the skin-friendly non-woven fabric layer 1 and the liquid-guiding non-woven fabric layer 2 is that a large number of experimental tests show that the high temperature of more than 60 ℃ is favorable for improving the opening effect and efficiency, but the glass transition temperature of most non-woven fabric fibers is 80-90 ℃, and the fiber deformation of the non-woven fabric is easily caused by the overhigh temperature. The permeability of the skin-friendly non-woven fabric layer 1 and the liquid-guiding non-woven fabric layer 2 subjected to fiber opening treatment is tested by using a geotextile vertical permeameter, the permeability of the skin-friendly non-woven fabric layer 1 and the liquid-guiding non-woven fabric layer 2 subjected to fiber opening treatment is tested by using a fabric permeameter, the permeability of the water is higher than 8500mL/min, and the permeability of the air is higher than 7500 mm/s. The hydrophilic nonwoven layer 4 is in direct contact with the absorbent core layer and also acts as a barrier against rewet, so that it is not subjected to a splitting treatment.
The foregoing merely represents preferred embodiments of the invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (7)

1. A nonwoven fabric for diaper topsheet characterized in that: the non-woven fabric for the surface layer of the diaper is formed by sequentially overlapping a skin-friendly non-woven fabric layer, a liquid-guiding non-woven fabric layer and a hydrophilic non-woven fabric layer from top to bottom, wherein a plurality of groups of flow guide grooves are uniformly arranged on the liquid-guiding non-woven fabric layer, and the flow guide grooves are semi-closed grooves which are not through from top to bottom; the bottom of the hydrophilic non-woven fabric layer is provided with a plurality of groups of convex bodies, and the convex bodies are rolling points formed by hot rolling the hydrophilic non-woven fabric layer; the skin-friendly non-woven fabric layer and the liquid guide non-woven fabric layer are subjected to high-temperature oscillation fiber opening treatment, and the fiber opening treatment step comprises the following steps:
(1) arranging the non-woven fabrics of the skin-friendly non-woven fabric layer and the liquid-guiding non-woven fabric layer in an oscillator for oscillation, adding a fiber-opening agent solution into the oscillator, increasing the temperature from 20-30 ℃ to 60-80 ℃ in the oscillation process for 10-15 min, and continuing for 15-30 min at the constant temperature of 60-80 ℃;
(2) washing the non-woven fabric treated in the step (1) at a constant temperature, and washing the non-woven fabric with clear water at a constant temperature of 50-80 ℃ until the non-woven fabric is neutral;
(3) soaking the non-woven fabric cleaned in the step (2) in a medical antibacterial liquid and carrying out oscillation treatment, wherein the oscillation time is 1-3 min and the oscillation temperature is 40-60 ℃;
(4) and (4) washing the surface of the non-woven fabric treated in the step (3) by flowing water, and drying.
2. The nonwoven fabric for diaper topsheet according to claim 1, characterized in that: the diversion trench is wavy along the liquid-guiding non-woven fabric layer flat pavement.
3. The nonwoven fabric for diaper topsheet according to any one of claims 1 or 2, characterized in that: the diversion trench is of a conical structure with a wide upper part and a narrow lower part along the section of the liquid guide non-woven fabric layer.
4. The nonwoven fabric for diaper topsheet according to claim 1, characterized in that: and (3) oscillating in the steps (1) and (3) by adopting ultrasonic wave.
5. The nonwoven fabric for diaper topsheet according to claim 1, characterized in that: the number of the liquid guide non-woven fabric layers is more than two, and the flow guide grooves on the adjacent liquid guide non-woven fabric layers are distributed in a mutually staggered mode.
6. The nonwoven fabric for diaper topsheet according to claim 1, characterized in that: the thickness of the skin-friendly non-woven fabric layer and the thickness of the hydrophilic non-woven fabric layer are not higher than 1 mm.
7. The nonwoven fabric for diaper topsheet according to claim 1, characterized in that: the depth of the diversion trench is not less than 1/2 of the thickness of the liquid guide non-woven fabric layer.
CN201911116300.5A 2019-11-14 2019-11-14 Nonwoven fabric for diaper surface layer Active CN110699851B (en)

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US20060160455A1 (en) * 2003-06-06 2006-07-20 Mitsubishi Chemical Corporation Water-absorbent article and method for producing the same
CN205268404U (en) * 2016-01-05 2016-06-01 山东俊富无纺布有限公司 Imbibition combined material and health supplies
CN108265393A (en) * 2018-01-05 2018-07-10 江苏盛纺纳米材料科技股份有限公司 The preparation method of 6 excipient embossed nonwoven materials
CN110016766A (en) * 2019-04-16 2019-07-16 浙江欣富无纺布科技有限公司 Dumbbell shaped pressure point compound nonwoven cloth and its process equipment and processing technology

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060160455A1 (en) * 2003-06-06 2006-07-20 Mitsubishi Chemical Corporation Water-absorbent article and method for producing the same
CN205268404U (en) * 2016-01-05 2016-06-01 山东俊富无纺布有限公司 Imbibition combined material and health supplies
CN108265393A (en) * 2018-01-05 2018-07-10 江苏盛纺纳米材料科技股份有限公司 The preparation method of 6 excipient embossed nonwoven materials
CN110016766A (en) * 2019-04-16 2019-07-16 浙江欣富无纺布科技有限公司 Dumbbell shaped pressure point compound nonwoven cloth and its process equipment and processing technology

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