CN219600588U - Breathable liquid-proof composite non-woven fabric - Google Patents
Breathable liquid-proof composite non-woven fabric Download PDFInfo
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- CN219600588U CN219600588U CN202320190069.XU CN202320190069U CN219600588U CN 219600588 U CN219600588 U CN 219600588U CN 202320190069 U CN202320190069 U CN 202320190069U CN 219600588 U CN219600588 U CN 219600588U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
A breathable liquid-proof composite nonwoven fabric has a layered structure, the composite nonwoven fabric comprises a first layer composed of nonwoven fabric and a second layer composed of superfine fiber mesh sheets, wherein the superfine fiber mesh sheets in the second layer are composed of superfine fibers with fiber diameters less than or equal to 10 mu m, and the gram weight is 0.5-20 g/m 2 The superfine fiber mesh sheet in the second layer passes through the superfine fiberThe fiber is fused and adhered on the surface of the first layer of non-woven fabric, and gaps exist among the fibers in the superfine fiber mesh sheet, and the gaps generated among the fibers in the thickness direction of the composite non-woven fabric are irregularly arranged, so that large-particle liquid is difficult to permeate through the gaps, but gas can easily pass through the gaps, and the effects of ventilation and liquid separation are achieved.
Description
Technical Field
The utility model relates to the technical field of non-woven fabrics, in particular to a breathable liquid-proof non-woven fabric applied to disposable absorbent products.
Background
The disposable absorbent article is composed of a top sheet, an absorbent core layer, and a base film, wherein the base film is located at the outermost layer of the disposable absorbent article and functions to prevent leakage of absorbed body fluid, and therefore, the base film is generally a waterproof breathable film. The waterproof breathable film comprises a breathable film and a breathable composite film. The breathable film is prepared by adding inorganic filler into raw resin, and forming micropores at the joint of the inorganic filler and the plastic film matrix being shaped in the stretching process, wherein the micropores have very fine pore diameters (about 0.01-10 microns), can only permeate water vapor molecules with the particle size of 0.4nm, and cannot permeate water. The breathable composite film is formed by compounding the breathable film and the non-woven fabric in a tape casting compounding or glue compounding mode. However, the breathable film has very small micropores and limited air permeability, and when the breathable film and the absorbent core layer are compounded together, the micropores are easily blocked by the hot melt adhesive for compounding, and the air permeability can be further reduced, so that after the breathable film or the breathable composite film is used for the bottom film of the disposable absorbent product, the breathable film or the breathable composite film can generate wet and tight feeling when worn, and the problems of bacteria breeding, allergy and the like are easy to generate after long-time wearing.
Disclosure of Invention
The utility model aims to provide a composite non-woven fabric with good air permeability and excellent liquid-proof performance, and overcomes the defects of the existing products.
In order to achieve the above purpose, the solution of the present utility model is:
a breathable liquid-barrier composite nonwoven fabric having a layered structure, the composite nonwoven fabric comprising a first layer made of nonwoven fabric and a second layer made of a ultrafine fiber mesh sheet, wherein the ultrafine fiber mesh sheet in the second layer is made of ultrafine fibers having a fiber diameter of 10 μm or less, the nonwoven fabric comprising a nonwoven fabric layer made of a nonwoven fabric and a nonwoven fabric layer made of a nonwoven fabricThe gram weight of the superfine fiber mesh sheet is 0.5-20 g/m 2 The superfine fiber mesh sheet in the second layer is adhered to the surface of the first layer of non-woven fabric through superfine fiber fusion.
The first layer of non-woven fabric is hot air non-woven fabric, spun-bonded non-woven fabric, hot rolled non-woven fabric or spun-laced non-woven fabric.
The superfine fiber net-shaped sheet in the second layer is a single-layer superfine fiber net or a multi-layer superfine fiber net.
The gram weight of the superfine fiber mesh sheet in the second layer is 1-5 g/m 2 。
The air permeability of the composite non-woven fabric is 700-1500L/m 2 /s。
The hydrostatic pressure resistance value of the composite non-woven fabric is 150-300 cmH 2 O。
The composite non-woven fabric also comprises a third layer which is adhered to the superfine fiber net-shaped sheet in the second layer and is formed by non-woven fabrics.
The composite non-woven fabric also comprises a third layer which is adhered to the first layer of non-woven fabric and is formed by superfine fiber net-shaped sheets.
After the technical scheme is adopted, the breathable and liquid-proof composite non-woven fabric comprises the first layer formed by the non-woven fabric and the second layer formed by the superfine fiber mesh sheet, wherein the superfine fiber mesh sheet is formed by stacking superfine fibers with the fiber diameter less than or equal to 10 mu m, gaps exist among the fibers, gaps generated among the fibers in the thickness direction of the composite non-woven fabric are irregularly arranged, so that large-particle liquid is difficult to permeate through the gaps, but gas can easily pass through the gaps, the breathable and liquid-proof effect is achieved, different breathability and liquid-proof effects are achieved by adjusting the fiber diameter or the fiber layer number, different requirements of customers are met, and the breathable and liquid-proof composite non-woven fabric can be applied to different fields, such as an outer layer of an absorbent product and a side-proof absorbent product. Meanwhile, the ventilation and liquid separation effects are realized through the superfine fiber mesh sheet, so that the plasticity of the traditional ventilation film is reduced, and the softness of the composite non-woven fabric is also increased. The hand feeling of the composite non-woven fabric is further improved due to the existence of the first layer non-woven fabric, the tensile strength of the composite non-woven fabric is also improved, and the first layer non-woven fabric and the second layer superfine fiber mesh sheet are fused and adhered together through the superfine fibers, so that the influence of hot melt adhesive on softness and air permeability of the composite non-woven fabric due to the fact that the hot melt adhesive seeps out along the pores is avoided.
Drawings
FIG. 1 is a cross-sectional view of a breathable liquid-barrier composite nonwoven fabric according to example 1 of the present utility model.
Fig. 2 is a schematic view showing the production of the air-permeable, liquid-impermeable composite nonwoven fabric according to example 1 of the present utility model.
FIG. 3 is a cross-sectional view of the air-permeable, liquid-impermeable composite nonwoven fabric according to example 2 of the present utility model.
FIG. 4 is a schematic view showing the production of a breathable liquid-barrier composite nonwoven fabric according to example 2 of the present utility model.
FIG. 5 is a cross-sectional view of the air-permeable, liquid-impermeable composite nonwoven fabric according to example 3 of the present utility model.
FIG. 6 is a schematic view showing the production of a breathable liquid-barrier composite nonwoven fabric according to example 3 of the present utility model.
FIG. 7 is a cross-sectional view of the air-permeable, liquid-impermeable composite nonwoven fabric according to example 4 of the present utility model.
FIG. 8 is a schematic view showing the production of a breathable liquid-barrier composite nonwoven fabric according to example 4 of the present utility model.
Symbol description:
[ example 1 ]
The air-permeable and liquid-proof composite non-woven fabric 1, a first layer A1, a second layer B1, a guide roller G1, a screw extruder A1, a melt-blown spinning device B1, a hot air flow C1, a spinneret plate D1 and a fiber bundle C1;
[ example 2 ]
The air-permeable and liquid-proof composite non-woven fabric 2, a first layer A2, a second layer B2, a guide roller G2, a screw extruder A21, melt-blowing spinning devices B21, B22, B23 and B24, a hot air flow C21, a spinneret plate D21 and a fiber bundle C21;
[ example 3 ]
The air-permeable and liquid-proof composite non-woven fabric 3, a first layer A3, a second layer B3, a third layer D3, guide rollers G31 and G32, a screw extruder A3, a melt-blowing spinning device B3, a hot air flow C3, a spinneret plate D3 and a fiber bundle C3;
[ example 4 ]
The air-permeable and liquid-proof composite nonwoven fabric 4, the first layer A4, the second layer B4, the third layer D4, guide rollers G4 and H4, screw extruders A41 and A42, melt-blowing spinning devices B41 and B42, hot air flow C41, a spinneret plate D41 and fiber bundles C41 and C42.
Detailed Description
In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.
Example 1
As shown in FIGS. 1 and 2, the utility model discloses a breathable liquid-barrier composite nonwoven fabric 1, which has a layered structure, wherein the composite nonwoven fabric 1 comprises a first layer a1 formed by nonwoven fabrics and a second layer b1 formed by superfine fiber mesh sheets, wherein the superfine fiber mesh sheets in the second layer b1 are formed by superfine fibers with fiber diameters less than or equal to 10 mu m, and the gram weight is 15g/m 2 The superfine fiber mesh sheet in the second layer b1 is adhered to the surface of the non-woven fabric of the first layer a1 through superfine fiber fusion. Wherein: the first layer a1 non-woven fabric is hot air non-woven fabric, spun-bonded non-woven fabric, hot rolled non-woven fabric or spun-laced non-woven fabric. The second layer b1 of the ultrafine fiber mesh sheet is a single-layer ultrafine fiber mesh.
The preparation method comprises the following steps:
(1) Unreeling the first layer a1 non-woven fabric by an unreeling device, and entering a compounding procedure through a guide roller G1;
(2) And a compounding step of heating and melting a thermoplastic resin by a screw extruder A1, feeding the heated thermoplastic resin into a melt-blowing spinning device B1, blowing off a melt stream of the thermoplastic resin ejected from the spinneret holes of a spinneret D1 into a fiber bundle C1 having a fiber diameter of 10 [ mu ] m by a hot air stream C1 in the melt-blowing spinning device B1, thereby forming a superfine fiber web accompanied by the hot air stream, and adhering the molten superfine fibers to the nonwoven fabric surface of the first layer A1 to form a breathable liquid-barrier composite nonwoven fabric 1 comprising a first layer A1 of nonwoven fabric and a second layer B1 of superfine fiber web-like sheet.
Example 2
As shown in fig. 3 and 4, the present utility model discloses a breathable liquid-barrier composite nonwoven fabric 2, wherein the superfine fiber mesh sheet in the second layer b2 is a multi-layer superfine fiber mesh.
The preparation method comprises the following steps:
(1) Unreeling the first layer a2 non-woven fabric by an unreeling device, and entering a compounding procedure through a guide roller G2;
(2) And a compounding step of heating and melting a thermoplastic resin by a screw extruder A21, feeding the heated thermoplastic resin into a melt-blowing spinning device B21, blowing a melt stream of the thermoplastic resin ejected from the spinneret holes of a spinneret D21 into a fiber bundle C21 having a fiber diameter of 10 [ mu ] m by a hot air stream C21 in the melt-blowing spinning device B21, thereby forming a superfine fiber web accompanying the hot air stream, adhering the superfine fiber web to the surface of the first layer A2 nonwoven fabric by the molten superfine fibers, and then feeding the thermoplastic resin into the melt-blowing spinning devices B22, B23 and B24 in this order, laminating and adhering a plurality of superfine fiber webs on the superfine fiber web to form a plurality of superfine fiber web sheets, thereby forming a breathable liquid-barrier composite nonwoven fabric 2 comprising a first layer A2 of nonwoven fabric and a second layer B2 of the plurality of superfine fiber web sheets.
Example 3
As shown in FIGS. 5 and 6, the present utility model discloses a breathable liquid-barrier composite nonwoven fabric 3 having a layered structure, the composite nonwoven fabric 3 comprising a first layer a3 composed of nonwoven fabric and a second layer b3 composed of ultrafine fiber mesh sheet, and further comprising a third layer d3 composed of nonwoven fabric adhered to the ultrafine fiber mesh sheet in the second layer b3, wherein the ultrafine fiber mesh sheet in the second layer b3 is composed of ultrafine fibers having a fiber diameter of 10 μm or less, and has a gram weight of 20g/m 2 The ultrafine fiber mesh sheet in the second layer b3 is melt-adhered to the nonwoven fabric surfaces of the first layer a3 and the third layer d3 by ultrafine fibers. Wherein: the first layer a3 and the third layer d3 of non-woven fabrics are hot air non-woven fabrics, spun-bonded non-woven fabrics, hot rolled non-woven fabrics or spun-laced non-woven fabrics. The second layer b3 of ultrafine fiber mesh sheet is a single layer ultrafine fiber mesh.
The preparation method comprises the following steps:
(1) The first layer a3 and the third layer d3 of non-woven fabrics are arranged oppositely and are respectively unreeled by an unreeling device, and enter a compounding procedure through guide rollers G31 and G32 respectively;
(2) And a compounding step of heating and melting a thermoplastic resin by a screw extruder A3, and then feeding the heated thermoplastic resin into a melt-blowing spinning device B3, wherein a melt stream of the thermoplastic resin discharged from a spinneret orifice of a spinneret D3 is blown off by a hot air stream C3 into a fiber bundle C3 having a fiber diameter of 10 [ mu ] m or less in the melt-blowing spinning device B3, thereby forming a superfine fiber web accompanying the hot air stream, and the superfine fiber web is fed between the first layer A3 nonwoven fabric and the third layer D3 nonwoven fabric and adhered to the surfaces of the first layer A3 and the third layer D3 nonwoven fabric by the molten superfine fibers, thereby forming a breathable liquid-barrier composite nonwoven fabric 3 comprising a first layer A3, a third layer D3 and a second layer B3 comprising a superfine fiber net-like sheet.
Example 4
As shown in FIGS. 7 and 8, the present utility model discloses a breathable liquid-barrier composite nonwoven fabric 4 having a layered structure, the composite nonwoven fabric 4 comprising a first layer a4 composed of nonwoven fabric and a second layer b4 composed of ultrafine fiber mesh sheet, and further comprising a third layer d4 composed of ultrafine fiber mesh sheet adhered to the nonwoven fabric of the first layer a4, wherein the ultrafine fiber mesh sheet in the second layer b4 and the third layer d4 is composed of ultrafine fibers having a fiber diameter of 10 μm or less, and the gram weights are 5g/m 2 The ultrafine fiber mesh sheet in the second layer b4 and the third layer d4 is melt-adhered to the nonwoven fabric surface of the first layer a4 by the ultrafine fibers. Wherein: the first layer a4 non-woven fabric is hot air non-woven fabric, spun-bonded non-woven fabric, hot rolled non-woven fabric or spun-laced non-woven fabric. The ultrafine fiber mesh sheets in the second layer b4 and the third layer d4 may be single-layer ultrafine fiber mesh or multi-layer ultrafine fiber mesh.
The preparation method comprises the following steps:
(1) Unreeling the first layer a4 non-woven fabric by an unreeling device, and respectively entering a compounding procedure by guide rollers G4;
(2) And a compounding step of heating the thermoplastic resin by a screw extruder A41, melting the thermoplastic resin, feeding the heated thermoplastic resin into a melt-blowing spinning device B41, blowing a melt stream of the thermoplastic resin ejected from the spinneret holes of a spinneret D41 into a fiber bundle C41 having a fiber diameter of 10 [ mu ] m by a hot air stream C41 in the melt-blowing spinning device B41, thereby forming a superfine fiber web accompanied by the hot air stream, adhering the molten superfine fibers to the surface of the nonwoven fabric of the first layer A4, feeding the thermoplastic resin into a second compounding step by a guide roll H4, adhering the superfine fiber bundle C42 formed by the melt-blowing spinning device A42 to the other surface of the nonwoven fabric of the first layer A4 by the molten superfine fibers, thereby forming a breathable liquid-barrier composite nonwoven fabric 4 comprising a first layer A4 composed of nonwoven fabric, a second layer B4 composed of a superfine fiber net sheet and a third layer D4 composed of a superfine fiber net sheet.
Air permeability.
Test instrument: FX 3300-IV breathability tester.
1. Area was 38cm 2 The upper test head of (2) is provided with a clamping arm and a high-pressure rubber tube is connected with the upper test head, the upper test head is 38cm 2 The lower test head of the test tube is fixed in the constant diameter ring of the test sample and the high-pressure rubber tube is connected with the lower test head.
2. Setting experimental conditions: the unit selection is: m is m 3 /m 2 Test pressure/min: 125 Pa.
3. The sample is placed on the lower test head in a flat way, the clamp arm is pressed down to start the test, and the reading can be recorded when the indicator lamp of the correct test range is stabilized and displayed green.
And is resistant to hydrostatic pressure.
Test instrument: model YG825 fabric hydrostatic pressure tester.
1. About 1200ML distilled water was injected into the test rig tank.
2. And (3) adjusting the movable primer of the test device to keep the platform of the test device horizontal. The power switch is turned on, the power is turned on, and the "ready" indicator light is lighted. The water pressure rise rate of the instrument was adjusted to 6.0 kPa/min.+ -. 0.3 kPa/min.
3. The left-handed test device rotates the handle to enable the cloth pressing triangular cover to ascend, and the handle is rotated right after the sample is put flat to enable the cloth pressing triangular cover to descend and clamp the cloth sample.
4. Closing a water drain valve on the test device, wiping water on the surface of the clamping device, and clamping the lower surface of the test sample in the test head. The test is performed as per the button [ start ]. MeasuringWater pressure was applied to the sample at the time of the test to observe the sign of water penetration. When the third water drop oozes out on the surface of the sample, the water pressure value (unit is kPa or cmH) of the instrument at the moment is immediately recorded 2 O)。
The performance of the breathable liquid barrier composite nonwoven fabrics in examples 1, 2, 3 and 4 was tested and evaluated, respectively, using the test items and methods described above.
| Test item | Gram weight | Air permeability | Hydrostatic pressure resistance |
| Unit (B) | g/m 2 | L/m 2 /s | cmH 2 O |
| Example 1 sample | 30 | 1500 | 150 |
| Example 2 sample | 30 | 1200 | 230 |
| Example 3 sample | 40 | 1450 | 260 |
| Example 4 sample | 25 | 1250 | 205 |
After the technical scheme is adopted, the breathable and liquid-proof composite non-woven fabrics 1, 2, 3 and 4 comprise the first layers a1, a2, a3 and a4 formed by non-woven fabrics and the second layers b1, b2, b3 and b4 formed by superfine fiber mesh sheets, wherein the superfine fiber mesh sheets are formed by stacking superfine fibers with the fiber diameter less than or equal to 10 mu m, fine gaps exist among the fibers, gaps generated among the fibers in the thickness direction of the composite non-woven fabrics are irregularly arranged, so that large-particle liquid is difficult to permeate through the gaps, but gas can easily pass through the gaps, thereby achieving the effects of breathability and liquid-proof, different breathability and liquid-proof properties are achieved by adjusting the fiber diameter or the fiber layer number, different requirements of customers are met, the second layer b2 is formed by stacking a plurality of layers of superfine fiber meshes, the gaps among the fibers are effectively reduced, the water pressure resistance is improved, and the liquid-proof property of the material is improved; in example 4, the presence of the second layer b4 and the third layer d4, which are made of two layers of ultrafine fiber mesh sheets, further improves the liquid-barrier performance of the breathable liquid-barrier composite nonwoven fabric, i.e., higher hydrostatic pressure resistance can be achieved at lower gram weights. Thus, different air permeabilities and hydrostatic pressures can be made by adjustment of the process, which can be applied in different fields, for example for the outer layers of absorbent articles, for the barriers of absorbent articles, etc.
Meanwhile, the ventilation and liquid separation effects are realized through the superfine fiber mesh sheet, so that the plasticity of the traditional ventilation film is reduced, and the softness of the composite non-woven fabric is also increased. In the embodiment 3, the first layer a3 and the third layer d3 bonded with the second layer b3 formed by the superfine fiber mesh sheet are non-woven fabrics, so that the non-woven fabrics which are in contact with the skin in use are soft to touch, the flexibility of the breathable liquid-barrier composite non-woven fabrics is improved, the tensile strength of the composite non-woven fabrics is also improved, the first layer non-woven fabrics and the second layer superfine fiber mesh sheet are adhered together through the fusion of the superfine fibers, and the phenomenon that the hot melt adhesive exudes along pores to affect the flexibility and the air permeability of the composite non-woven fabrics is avoided.
Claims (8)
1. The utility model provides a ventilative liquid-proof composite nonwoven, has lamellar structure, its characterized in that: the composite nonwoven fabric comprises a first layer formed by nonwoven fabric and a second layer formed by superfine fiber net-shaped sheet; the superfine fiber netlike sheet in the second layer consists of superfine fibers with the fiber diameter less than or equal to 10 mu m, and the gram weight of the superfine fiber netlike sheet is 0.5-20 g/m 2 The superfine fiber mesh sheet in the second layer is adhered to the surface of the first layer of non-woven fabric through superfine fiber fusion.
2. The breathable, liquid-barrier composite nonwoven fabric of claim 1, wherein: the first layer of non-woven fabric is hot air non-woven fabric, spun-bonded non-woven fabric, hot rolled non-woven fabric or spun-laced non-woven fabric.
3. The breathable, liquid-barrier composite nonwoven fabric of claim 1, wherein: the superfine fiber net-shaped sheet in the second layer is a single-layer superfine fiber net or a multi-layer superfine fiber net.
4. The breathable, liquid-barrier composite nonwoven fabric of claim 1, wherein: the gram weight of the superfine fiber mesh sheet in the second layer is 1-5 g/m 2 。
5. The breathable, liquid-barrier composite nonwoven fabric of claim 1, wherein: the air permeability of the composite non-woven fabric is 700-1500L/m 2 /s。
6. The breathable, liquid-barrier composite nonwoven fabric of claim 1, wherein: the hydrostatic pressure resistance value of the composite non-woven fabric is 150-300 cmH 2 O。
7. The breathable, liquid-barrier composite nonwoven fabric of claim 1, wherein: the composite non-woven fabric also comprises a third layer which is adhered to the superfine fiber net-shaped sheet in the second layer and is formed by non-woven fabrics.
8. The breathable, liquid-barrier composite nonwoven fabric of claim 1, wherein: the composite non-woven fabric also comprises a third layer which is adhered to the first layer of non-woven fabric and is formed by superfine fiber net-shaped sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320190069.XU CN219600588U (en) | 2023-02-10 | 2023-02-10 | Breathable liquid-proof composite non-woven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320190069.XU CN219600588U (en) | 2023-02-10 | 2023-02-10 | Breathable liquid-proof composite non-woven fabric |
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| CN219600588U true CN219600588U (en) | 2023-08-29 |
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| CN202320190069.XU Active CN219600588U (en) | 2023-02-10 | 2023-02-10 | Breathable liquid-proof composite non-woven fabric |
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| CN (1) | CN219600588U (en) |
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- 2023-02-10 CN CN202320190069.XU patent/CN219600588U/en active Active
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