High-moisture-absorption and high-air-permeability elastic waistline sheet

Abstract

The utility model relates to a high-moisture-absorption high-air-permeability elastic waistline sheet which sequentially comprises a first non-woven fabric layer, a moisture absorption layer and a second non-woven fabric layer from top to bottom, and a first spandex yarn layer and a second spandex yarn layer are arranged between every two adjacent non-woven fabric layers in a staggered mode and connected into a whole in a composite mode through an adhesive layer. Wherein the first non-woven fabric layer is a fine denier fiber web layer, and the second non-woven fabric layer is a coarse denier fiber web layer; the fine denier fiber mesh layer is provided with a plurality of first air holes, the moisture absorption layer is provided with second air holes, the coarse denier fiber mesh layer is provided with third air holes, the first air holes and the third air holes are communicated with the second air holes, and aperture gradient differences are sequentially formed among the first air holes, the third air holes and the second air holes. The aperture gradient difference is that the aperture of the first air hole is more than the aperture of the third air hole and less than the aperture of the second air hole.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of sanitary products, and particularly relates to a high-hygroscopic high-breathable elastic waist circumference sheet. BACKGROUND

[0002] Traditional paper diapers are usually fixed by means of two-end adhesive fastening (i.e. waist paste), which can be adjusted in size according to the waist circumference of the baby, so as to prevent the baby's skin from being injured or the paper diaper from falling off and leaking urine, but the baby needs to lie down for changing.

[0003] However, with the increasing demand of consumers for high-end products, paper diapers are also developing towards comfort and breathability, so that elastic waistbands are widely used in disposable absorbent articles such as paper diapers and pull-ups, and the elastic waistband as a core component of the disposable absorbent article plays a key role in the wearing experience of the disposable absorbent article and directly affects the overall comfort of the disposable absorbent article.

[0004] However, the existing elastic waistband usually uses spandex as the elastic material of the elastic waistband, and the elastic material is clamped by an inner layer of spunbond nonwoven fabric and an outer layer of spunbond nonwoven fabric to prepare the elastic waistband, but such an elastic waistband has the problem of poor hygroscopicity or sweat absorption and moisture removal, and when the skin sweats, it is easy to cause sweat on the waist of the baby, and further cause skin itching and red rash.

[0005] To solve the problem of hygroscopicity of the elastic waistband, the prior art CN216091071U discloses an elastic and breathable waist structure and a paper diaper, the waist structure comprises: an inner layer, the inner layer comprises one or more than two layers of stacked elastic film; an outer layer, the outer layer is compounded on at least one side of the inner layer, and the inner layer and the outer layer are compounded to form a waist body; a plurality of breathable holes are formed on the waist body. The prior art uses an elastic film as the inner layer, without the need to compound an elastic band to provide elasticity, avoiding affecting the breathability and causing marks during wearing, and having the advantages of good breathability and high comfort. Obviously, although the prior art improves the breathability, it does not have hygroscopicity, on the one hand, it is difficult to be absorbed when the skin sweats, and on the other hand, it is difficult to be absorbed when the paper diaper has a small amount of front leakage or rear leakage in the use state, on the contrary, the leakage will overflow from the breathable holes.

[0006] However, in order to solve the problem of the elastic waistband, the prior art CN218257195 U discloses an elastic composite non-woven material with moisture absorption, which comprises a layer, a spandex filament layer, a wet strength paper layer and a surface layer, the layer and the surface layer are non-woven fabrics, the spandex filament layer is coated with adhesive on the spandex filament, so that the surface layer and the wet strength paper layer are adhered, and the surface layer side of the non-woven fabric material maintains sufficient elasticity, the wet strength paper layer and the surface layer are provided with a connecting adhesive layer, so that the wet strength paper layer and the surface layer are fully bonded, so that the wet strength paper layer provides effective support and strength to the surface layer, so that the surface layer has external protection, when the elastic composite non-woven material is subjected to moisture penetration, the wet strength paper layer can absorb moisture, and the non-woven material maintains tension, so that the non-woven material has moisture absorption and air permeability, and the phenomenon that the elastic material does not absorb moisture is avoided, which is extremely suitable for the elastic waistband and abdominal circumference of baby diapers, adult incontinence and menstrual pants, and the main component of the wet strength paper layer is wood pulp fiber, which can quickly absorb liquid, but the absorption is physical absorption, and the absorbed liquid is easily squeezed out under pressure, re-seeps and contacts the skin or overflows, and the wet strength treatment reduces the softness. Practical new type content

[0007] The present application is directed to the problems existing in the prior art, and takes into account high moisture absorption, air permeability and softness, and provides a high moisture absorption and air permeability elastic waistband sheet to meet the high-end needs of consumers.

[0008] The utility model discloses the following technical scheme is realized:

[0009] The high moisture absorption and air permeability elastic waistband sheet comprises a first non-woven fabric layer, a moisture absorption layer and a second non-woven fabric layer from top to bottom, and a first spandex filament layer and a second spandex filament layer are arranged between two adjacent non-woven fabric layers in a staggered manner, and are connected into one by a glue layer.

[0010] The utility model has the following structural characteristics:

[0011] Firstly, the first non-woven fabric layer is a fine denier fiber web layer, and the second non-woven fabric layer is a coarse denier fiber web layer.

[0012] Secondly, the fine denier fiber web layer is provided with a plurality of first air permeable holes, the moisture absorption layer is provided with second air permeable holes, and the coarse denier fiber web layer is provided with third air permeable holes, the first air permeable holes and the third air permeable holes are in communication with the second air permeable holes, but the three have a pore size gradient difference in sequence, and the pore size gradient difference is that the pore size of the first air permeable holes is smaller than that of the third air permeable holes, and the pore size of the third air permeable holes is smaller than that of the second air permeable holes.

[0013] Preferably, the fine denier fiber web layer selects fibers with a denier of 1.0-3.0D and a length of 45-55mm, and a hydrophilic coating is provided on the outer side of the fibers.

[0014] Preferably, the coarse denier fiber web layer is made of fibers with a denier of 5.0-10.0D and a length of 45-55mm.

[0015] Preferably, the pore size of the first vent is 50-300 μm, the pore size of the third vent is 200-600 μm, and the pore size of the second vent is 500-2000 μm.

[0016] Preferably, the moisture-absorbing layer is a moisture-absorbing non-woven fabric layer, and the moisture-absorbing non-woven fabric layer has through holes of 600-1500μm.

[0017] The beneficial technical effects of this utility model are as follows:

[0018] 1. This utility model uses a moisture-absorbing non-woven fabric layer as the moisture-absorbing and liquid-absorbing medium. It has excellent softness and not only has a fast moisture-absorbing and liquid-absorbing rate, but also can quickly lock in the liquid, preventing the liquid from seeping back to the skin or overflowing under pressure.

[0019] 2. This utility model has good sweat absorption and liquid absorption functions, so that when the elastic waistband sheet of this application is used in disposable absorbent products, it has a leak-proof effect that prevents leakage at the front and back ends.

[0020] 3. The present invention features a pore size gradient difference between the air pores of the fine denier fiber web layer and the air pores of the moisture-absorbing layer, and between the air pores of the moisture-absorbing layer and the air pores of the coarse denier fiber web layer. That is, the pore size of the air pores of the fine denier fiber web layer is less than that of the air pores of the coarse denier fiber web layer, which is less than that of the air pores of the moisture-absorbing layer. This pore size gradient difference avoids the situation where the moisture-absorbing layer expands after absorbing moisture or liquid, resulting in a significant reduction in pore size or even complete blockage. This ensures that the air pores of the moisture-absorbing layer are open and connected to the air pores of the fine denier fiber web layer and the coarse denier fiber web layer, resulting in excellent air permeability. Attached Figure Description

[0021] Fig. 1 This is a schematic diagram of a fine denier fiber web.

[0022] Fig. 2 This is a schematic diagram of a coarse denier fiber web.

[0023] Fig. 3 This is a cross-sectional view of a highly absorbent, breathable, and elastic waistband sheet. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0026] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0027] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0028] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0029] Please also refer to the appendix. Figs. 1-3 The highly absorbent and breathable elastic waistband sheet comprises, from top to bottom, a first nonwoven fabric layer, a moisture-absorbing layer, and a second nonwoven fabric layer. A first spandex filament layer and a second spandex filament layer are staggered between two adjacent nonwoven fabric layers and bonded together by an adhesive layer. The first and second nonwoven fabric layers have a pleated structure, consisting of crests and troughs connecting the crests. The crests and troughs extend alternately along the longitudinal direction of the nonwoven fabric layer. Along the transverse direction of the nonwoven fabric layer's width, multiple spandex filaments are spaced at intervals of 0.5-6 mm. The two ends of each spandex filament are laid parallel to the longitudinal direction of the nonwoven fabric layer to form the elastic layer. The spandex filaments are connected to the troughs by the adhesive layer, giving the elastic sheet tensile resilience in its longitudinal direction.

[0030] In a specific embodiment, the spandex yarn is 10-2000 Denier spandex yarn, the elongation ratio of the spandex yarn is 1.1-6.0, and all the spandex yarns have the same elongation ratio.

[0031] In a specific embodiment, the nonwoven fabric layer is selected from spunbond nonwoven fabric, bicomponent nonwoven fabric, or hot-air nonwoven fabric.

[0032] This utility model has the following structural features:

[0033] Firstly, the first nonwoven fabric layer is a fine denier fiber web layer, while the second nonwoven fabric layer is a coarse denier fiber web layer.

[0034] Secondly, the fine denier fiber web layer is provided with a plurality of first air vents, the moisture-absorbing layer is provided with second air vents, and the coarse denier fiber web layer is provided with third air vents. The first air vents and the third air vents are all connected to the second air vents, but there is a pore size gradient difference between the three in sequence. The pore size gradient difference is that the pore size of the first air vent is less than the pore size of the third air vent, which is less than the pore size of the second air vent.

[0035] Specifically, the fine denier fiber web layer is made of fibers with a denier of 1.0-3.0D and a length of 45-55mm, and a hydrophilic coating is provided on the outer side of the fibers. This hydrophilic coating is a hydrophilic oil layer, which is a conventional embodiment in the art.

[0036] Specifically, the coarse denier fiber web layer is made of fibers with a denier of 5.0-10.0D and a length of 45-55mm.

[0037] In a specific embodiment, the pore size of the first breathable pore (fine denier fiber web layer) is 50-300 μm, the pore size of the third breathable pore (coarse denier fiber web layer) is 200-600 μm, and the pore size of the second breathable pore (moisture-absorbing layer) is 500-2000 μm. The pore size gradient difference can be achieved in the following way:

[0038] For example, the first pore (fine denier fiber web) has a pore size of 100 μm, the third pore (coarse denier fiber web) has a pore size of 200 μm, and the second pore (moisture-absorbing layer) has a pore size of 600 μm.

[0039] For example, the first pore (fine denier fiber web layer) has a pore size of 150 μm, the third pore (coarse denier fiber web layer) has a pore size of 300 μm, and the second pore (moisture-absorbing layer) has a pore size of 1000 μm.

[0040] For example, the first pore (fine denier fiber web layer) has a pore size of 250 μm, the third pore (coarse denier fiber web layer) has a pore size of 450 μm, and the second pore (moisture-absorbing layer) has a pore size of 1800 μm.

[0041] In a specific embodiment, the moisture-absorbing layer described in this application is a moisture-absorbing nonwoven fabric layer, which has through-pores of 600-1500μm. This moisture-absorbing nonwoven fabric layer is an existing material, which can be prepared by those skilled in the art using existing technologies, such as a nonwoven fabric disclosed in CN 101498076A, or a method for preparing a breathable and leak-proof diaper and absorbent nonwoven fabric for newborns provided in CN 107714306A, or it can be obtained from commercially available products.

[0042] This application uses a moisture-absorbing non-woven fabric layer as the moisture-absorbing and liquid-absorbing medium. It is highly flexible and not only absorbs moisture and liquid quickly, but also locks in liquid rapidly, preventing liquid from seeping back onto the skin or overflowing under pressure. Therefore, this application has excellent sweat-absorbing and liquid-absorbing functions, enabling the elastic waistband sheet used in disposable absorbent products to prevent leakage at both the front and back ends.

[0043] This application establishes a pore size gradient difference between the air pores of the fine denier fiber web layer and the air pores of the moisture-absorbing layer, and between the air pores of the moisture-absorbing layer and the air pores of the coarse denier fiber web layer. That is, the pore size of the air pores of the fine denier fiber web layer < the pore size of the air pores of the coarse denier fiber web layer < the pore size of the air pores of the moisture-absorbing layer. This pore size gradient difference avoids the situation where the pore size is greatly reduced or even completely blocked after the moisture-absorbing layer absorbs moisture or liquid and expands. This ensures that the air pores of the moisture-absorbing layer are open pores and connected to the air pores of the fine denier fiber web layer and the coarse denier fiber web layer, resulting in excellent air permeability.

[0044] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A highly absorbent and breathable elastic waistband sheet, comprising, from top to bottom, a first nonwoven fabric layer, a moisture-absorbing layer, and a second nonwoven fabric layer, wherein a first spandex filament layer and a second spandex filament layer are staggered between two adjacent nonwoven fabric layers and are bonded together by an adhesive layer, characterized in that: The first nonwoven fabric layer is a fine denier fiber web layer, while the second nonwoven fabric layer is a coarse denier fiber web layer; The fine denier fiber web layer has a plurality of first air vents, the moisture-absorbing layer has second air vents, and the coarse denier fiber web layer has third air vents. The first air vents and the third air vents are all connected to the second air vents, but the diameter of the first air vent is less than the diameter of the third air vent, which is less than the diameter of the second air vent.

2. The highly absorbent and breathable elastic waistband sheet according to claim 1, characterized in that: The fine denier fiber web is made of fibers with a denier of 1.0-3.0D and a length of 45-55mm, and a hydrophilic coating is provided on the outer side of the fibers.

3. The highly absorbent and breathable elastic waistband sheet according to claim 1, characterized in that: The coarse denier fiber web is made of fibers with a denier of 5.0-10.0D and a length of 45-55mm.

4. The highly absorbent and breathable elastic waistband sheet according to claim 1, characterized in that: The first vent has a pore size of 50-300μm, the third vent has a pore size of 200-600μm, and the second vent has a pore size of 500-2000μm.

5. The highly absorbent and breathable elastic waistband sheet according to claim 4, characterized in that: The moisture-absorbing layer is a moisture-absorbing non-woven fabric layer, and the moisture-absorbing non-woven fabric layer has through holes of 600-1500μm.

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