Elastic layer for wearable hygiene product and preparation method therefor

Abstract

An elastic layer for a wearable hygiene product and a preparation method therefor. The elastic layer for a wearable hygiene product comprises: a first non-woven fabric (100), a second non-woven fabric (200), and a third non-woven fabric (300) sequentially laminated; a plurality of first rubber bands (400), arranged between the first non-woven fabric (100) and the second non-woven fabric (200), a distance between two adjacent first rubber bands (400) being 0.2 mm to 12 mm; and a plurality of second rubber bands (500), arranged between the second non-woven fabric (200) and the third non-woven fabric (300), a distance between two adjacent second rubber bands (500) being 0.2 mm to 12 mm. Projections of the plurality of first rubber bands (400) and the plurality of second rubber bands (500) are alternately arranged in a vertical direction, so that a combination distance between an adjacent first rubber band (400) and an adjacent second rubber band (500) is 0.1 mm to 6 mm. By means of alternately arranging the projections of the plurality of first rubber bands (400) and the plurality of second rubber bands (500) in the vertical direction, the manufactured elastic layer not only meets the requirement of a small distance, but also reduces the accuracy requirement on a spraying apparatus, so that the cost and difficulty of spraying in the manufacturing process are reduced.

Description

Elastic layer for wearable sanitary products and preparation method thereof Technical Field

[0001] The present invention relates to the field of sanitary care, and in particular to an elastic layer for wearable sanitary products and a preparation method thereof. Background Art

[0002] The waistband of the wearable sanitary product is provided with an elastic layer to provide elasticity, thereby making the diapers / pull-up pants suitable for users with different waist circumferences.

[0003] Existing elastic layers typically consist of two non-woven fabrics with multiple elastic bands inserted between them. To ensure the elastic effect, manufacturers minimize the spacing between the elastic bands. However, when making the elastic layer, each elastic band typically needs to be sprayed with glue. This is done by placing multiple elastic bands into the gaps of a dedicated spraying device, with one elastic band placed in each gap. The spray gun then sprays the elastic bands in the gaps. This method has the following drawbacks:

[0004] The smaller the spacing between the rubber bands, the higher the gap accuracy requirement for the spraying device. It is difficult for general spraying devices to achieve this accuracy requirement, which increases the cost and difficulty of spraying.

[0005] The information disclosed in this background section is only intended to enhance understanding of the overall background of the invention and should not be considered as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0006] Summary of the Invention

[0007] The object of the present invention is to provide an elastic layer for wearable sanitary products and a preparation method thereof. By alternately arranging the projections of multiple first elastic bands and multiple second elastic bands in the upper and lower directions, the elastic layer can meet the requirements of a smaller spacing while reducing the precision requirements of the spraying device, thereby reducing the cost and difficulty of spraying during the production process.

[0008] According to a first aspect of the present invention, there is provided an elastic layer for a wearable sanitary product, comprising: a first non-woven fabric, a second non-woven fabric, and a third non-woven fabric stacked in sequence; a plurality of first elastic bands disposed between the first non-woven fabric and the second non-woven fabric, wherein the spacing between two adjacent ones of the plurality of first elastic bands is 0.2 to 12 mm; and a plurality of second elastic bands disposed between the second non-woven fabric and the third non-woven fabric, wherein the spacing between two adjacent ones of the plurality of second elastic bands is 0.2 to 12 mm; wherein the projections of the plurality of first elastic bands and the plurality of second elastic bands in the vertical direction are alternately arranged so that the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm.

[0009] Preferably, the plurality of first elastic bands are distributed at equal intervals, and the plurality of second elastic bands are distributed at equal intervals.

[0010] Preferably, the first elastic cord has an average decitex of 10 dtex to 940 dtex, and the second elastic cord has an average decitex of 10 dtex to 940 dtex.

[0011] Preferably, the first elastic band has a stretching range of 100%-400%, and the second elastic band has a stretching range of 100%-400%.

[0012] Preferably, the first non-woven fabric and the second non-woven fabric are bonded together via a first bonding portion, and the second non-woven fabric and the third non-woven fabric are bonded together via a second bonding portion.

[0013] According to a second aspect of the present invention, there is provided a method for preparing an elastic layer for a wearable sanitary product, comprising: preparing a first non-woven fabric, a second non-woven fabric, and a third non-woven fabric; laying a plurality of first elastic bands on the first non-woven fabric, wherein the spacing between two adjacent ones of the plurality of first elastic bands is 0.2 to 12 mm; laying a plurality of second elastic bands on the third non-woven fabric, wherein the spacing between two adjacent ones of the plurality of second elastic bands is 0.2 to 12 mm; laminating the second non-woven fabric on a side of the first non-woven fabric on which the first elastic bands are laid; laminating the side of the third non-woven fabric on which the second elastic bands are laid, wherein the projections of the plurality of first elastic bands and the plurality of second elastic bands in the upper and lower directions are alternately arranged, and the combined spacing between adjacent first and second elastic bands is 0.1 to 6 mm.

[0014] Before laying a plurality of first elastic bands on the first non-woven fabric, the method further includes: spraying glue on the first elastic bands; wherein the first elastic bands can be bonded to the first non-woven fabric by the glue, and the second non-woven fabric is bonded to the first non-woven fabric by the glue sprayed on the first elastic bands.

[0015] Preferably, before laying a plurality of second elastic bands on the third non-woven fabric, the method further comprises: spraying glue on the second elastic bands; wherein the second elastic bands can be bonded to the third non-woven fabric by the glue, and the second non-woven fabric is bonded to the third non-woven fabric by the glue sprayed on the second elastic bands.

[0016] According to a third aspect of the present invention, there is provided a method for preparing an elastic layer for a wearable sanitary product, comprising: preparing a first non-woven fabric, a second non-woven fabric, and a third non-woven fabric; laying a plurality of first elastic bands on a first side of the second non-woven fabric, and laying a plurality of second elastic bands on a second side of the second non-woven fabric, wherein the spacing between two adjacent elastic bands in the plurality of first elastic bands is 0.2 to 12 mm, and the spacing between two adjacent elastic bands in the plurality of second elastic bands is 0.2 to 12 mm, the projections of the plurality of first elastic bands and the plurality of second elastic bands in the upper and lower directions are alternately arranged, and the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm; laminating the second non-woven fabric on the first non-woven fabric; and laminating the third non-woven fabric on the second non-woven fabric.

[0017] Preferably, before laying a plurality of first elastic bands on the first side of the second non-woven fabric, the method further comprises: spraying glue on the first elastic bands; wherein the first elastic bands can be bonded to the first side of the second non-woven fabric by the glue, and the second non-woven fabric is bonded to the first non-woven fabric by the glue sprayed on the first elastic bands.

[0018] Preferably, before laying a plurality of second elastic bands on the second side of the second non-woven fabric, the method further comprises: spraying glue on the second elastic bands; wherein the second elastic bands can be bonded to the second side of the second non-woven fabric by the glue, and the second non-woven fabric is bonded to the third non-woven fabric by the glue sprayed on the second elastic bands.

[0019] According to a fourth aspect of the present invention, there is provided a method for preparing an elastic layer for a wearable sanitary product, comprising: preparing a first non-woven fabric, a second non-woven fabric, and a third non-woven fabric; laying a plurality of first elastic bands on the first non-woven fabric, wherein the spacing between two adjacent first elastic bands is 0.2 to 12 mm; laminating the second non-woven fabric on the first non-woven fabric; laying a plurality of second elastic bands on the second non-woven fabric, wherein the spacing between two adjacent second elastic bands is 0.2 to 12 mm, and the projections of the plurality of first elastic bands and the plurality of second elastic bands in the upper and lower directions are alternately arranged, and the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm; and laminating the third non-woven fabric on the second non-woven fabric.

[0020] Preferably, before laying a plurality of first elastic bands on the first non-woven fabric, the method further comprises: spraying glue on the first elastic bands; wherein the first elastic bands can be bonded to the first non-woven fabric by the glue, and the second non-woven fabric is bonded to the first non-woven fabric by the glue sprayed on the first elastic bands.

[0021] Preferably, before laying a plurality of second elastic bands on the second non-woven fabric, the method further comprises: spraying glue on the second elastic bands; wherein the second elastic bands can be bonded to the second non-woven fabric by the glue, and the third non-woven fabric is bonded to the second non-woven fabric by the glue sprayed on the second elastic bands.

[0022] The elastic layer for wearable sanitary products of the present invention is formed by alternately arranging the projections of multiple first elastic bands and multiple second elastic bands in the upper and lower directions, so that the elastic layer can meet the requirements of a smaller spacing while reducing the precision requirements of the spraying device, thereby reducing the cost and difficulty of spraying during the production process.

[0023] The methods and apparatus of the present invention have other features and advantages that will be apparent from, or will be described in detail in, the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of the internal structure of a first elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0025] FIG2 is an exploded perspective view corresponding to FIG1 ;

[0026] FIG3 is a schematic diagram of the internal structure of a second elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0027] FIG4 is a perspective exploded view corresponding to FIG3 ;

[0028] FIG5 is a schematic diagram of the internal structure of a third elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0029] FIG6 is a perspective exploded view corresponding to FIG5;

[0030] FIG7 is a schematic flow chart of a first method for preparing an elastic layer for a wearable sanitary product according to an embodiment of the present invention;

[0031] FIG8 is a schematic flow chart of a second method for preparing an elastic layer for a wearable sanitary product according to an embodiment of the present invention;

[0032] FIG9 is a schematic flow chart of a third method for preparing an elastic layer for a wearable sanitary product provided by an embodiment of the present invention.

[0033] Description of Reference Numerals: 100: First non-woven fabric 200: Second non-woven fabric 300: Third non-woven fabric 400: First elastic band 500: Second elastic band

[0034] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of the invention. The specific design features disclosed in the present invention (including, for example, specific dimensions, directions, locations, and shapes) will be determined in part by the specific intended application and use environment.

[0035] In the figures, like reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. DETAILED DESCRIPTION

[0036] Reference will now be made in detail to various embodiments of the present invention, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with the exemplary embodiments, it should be understood that this description is not intended to limit the invention to these exemplary embodiments. On the contrary, the present invention is intended to cover not only these exemplary embodiments, but also various alternative forms, modifications, equivalent forms and other embodiments that may be included within the spirit of the invention and the scope defined by the appended claims.

[0037] When an element is referred to as being “on” or “over” another element, the element may be in contact with the other element, or intervening elements may also be present.

[0038] The wearable sanitary products mentioned in the embodiments of the present invention include but are not limited to baby diapers / pull-up pants, women's sleep pants, and adult diapers / pull-up pants.

[0039] The elastic layer for a wearable sanitary product according to an embodiment of the present invention will be described below with reference to FIG. 1 to FIG. 9 .

[0040] FIG1 is a schematic diagram of the internal structure of a first elastic layer for a wearable sanitary product provided by an embodiment of the present invention; FIG2 is a three-dimensional exploded view corresponding to FIG1 .

[0041] As shown in FIG1 and FIG2 , the elastic layer for wearable sanitary products according to the embodiment of the present invention includes: a first non-woven fabric 100 , a second non-woven fabric 200 , a third non-woven fabric 300 , a plurality of first elastic bands 400 , and a plurality of second elastic bands 500 stacked in sequence.

[0042] The plurality of first elastic bands 400 are disposed between the first non-woven fabric 100 and the second non-woven fabric 200, and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 400 is 0.2 to 12 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm). Preferably, the distance D1 between two adjacent elastic bands in the plurality of first elastic bands 400 is 2 to 12 mm.

[0043] The plurality of second elastic bands 500 are disposed between the second non-woven fabric 200 and the third non-woven fabric 300, and a spacing D2 between two adjacent elastic bands in the plurality of second elastic bands 500 is 0.2 to 12 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm). Preferably, the spacing D2 between two adjacent elastic bands in the plurality of second elastic bands 500 is 2 to 12 mm.

[0044] The projections of the plurality of first elastic bands 400 and the plurality of second elastic bands 500 in the vertical direction are alternately arranged so that the combined spacing D3 of adjacent first elastic bands 400 and second elastic bands 500 is 0.1 to 6 mm (e.g., 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm). Preferably, the combined spacing D3 of adjacent first elastic bands 400 and second elastic bands 500 is 1 to 6 mm.

[0045] The elastic layer for wearable sanitary products according to the embodiment of the present invention is formed by alternately arranging the projections of multiple first elastic bands 400 and multiple second elastic bands 500 in the vertical direction. This allows the elastic layer to meet the requirements of a smaller spacing while reducing the precision requirements of the spraying device, thereby reducing the cost and difficulty of spraying during the production process.

[0046] For example, in the prior art, when the spacing between adjacent rubber bands is 3 mm, the gap accuracy of the spraying device is also required to be 3 mm.

[0047] When the embodiment of the present invention is used, the spacing between adjacent first and second rubber bands is also 3 mm (i.e., D3 is 3 mm). Since the projections of the plurality of first rubber bands and the plurality of second rubber bands in the vertical direction are arranged alternately, only the spacing between two adjacent rubber bands in the plurality of first rubber bands 400 needs to be 6 mm (i.e., D1 is 6 mm), and only the spacing between two adjacent rubber bands in the plurality of second rubber bands 500 needs to be 6 mm (i.e., D2 is 6 mm). At this time, the gap accuracy of the spraying device only needs to be 6 mm.

[0048] In an exemplary embodiment, the first non-woven fabric 100 / the second non-woven fabric 200 / the third non-woven fabric 300 may be spunlace fabric, spunbond fabric or spunmelt fabric.

[0049] When the diaper is worn on a person, the first nonwoven fabric 100, the second nonwoven fabric 200, the third nonwoven fabric 300, the first elastic bands 400 and the second elastic bands 500 of the elastic layer of the wearable sanitary product extend along the circumference of the waist of the person.

[0050] It should be noted that Figures 1 to 6 of the present invention merely illustrate the general shapes of the layers and their approximate positional relationships. To better distinguish the boundaries between the layers, gaps are shown between the layers in Figures 1 to 6. However, in actual products, there are no gaps between the first non-woven fabric 100, the second non-woven fabric 200, and the third non-woven fabric 300; instead, the fabrics are bonded together.

[0051] In an exemplary embodiment, the peel strength between the first nonwoven fabric 100 and the second nonwoven fabric 200 is about 1 N / cm to about 15 N / cm (e.g., 1 N / cm, 2 N / cm, 3 N / cm, 4 N / cm, 5 N / cm, 6 N / cm, 7 N / cm, 8 N / cm, 9 N / cm, 10 N / cm, 11 N / cm, 12 N / cm, 13 N / cm, 14 N / cm, 15 N / cm).

[0052] In an exemplary embodiment, the peel strength between the second nonwoven fabric 200 and the third nonwoven fabric 300 is about 1 N / cm to about 15 N / cm (e.g., 1 N / cm, 2 N / cm, 3 N / cm, 4 N / cm, 5 N / cm, 6 N / cm, 7 N / cm, 8 N / cm, 9 N / cm, 10 N / cm, 11 N / cm, 12 N / cm, 13 N / cm, 14 N / cm, 15 N / cm).

[0053] In an exemplary embodiment, glue is sprayed on the first elastic band 400. The first non-woven fabric 100 is bonded to the second non-woven fabric 200 by the glue sprayed on the first elastic band 400.

[0054] In an exemplary embodiment, glue is sprayed on the second elastic band 500. The second non-woven fabric 200 is bonded to the third non-woven fabric 300 by the glue sprayed on the second elastic band 500.

[0055] In addition to bonding by glue, the first elastic band 400, the first non-woven fabric 100 and the second non-woven fabric 200, as well as the second elastic band 500, the second non-woven fabric 200 and the third non-woven fabric 300 can also be bonded together by ultrasonic welding.

[0056] In one embodiment, as shown in Figure 1 , the plurality of first elastic bands 400 are distributed at equal intervals. In another embodiment, the plurality of first elastic bands 400 may also be distributed at non-equal intervals (not shown in the figure).

[0057] In one embodiment, as shown in Figure 1, the plurality of second elastic bands 500 are distributed at equal intervals. In another embodiment, the plurality of second elastic bands 500 may also be distributed at non-equal intervals (not shown in the figure).

[0058] In an exemplary embodiment, the first elastic string 400 has an average decitex of 10 dtex to 940 dtex (e.g., 10 dtex, 50 dtex, 100 dtex, 150 dtex, 200 dtex, 250 dtex, 300 dtex, 350 dtex, 400 dtex, 440 dtex, 500 dtex, 600 dtex, 700 dtex, 800 dtex, 940 dtex), and the second elastic string 500 has an average decitex of 10 dtex to 940 dtex (e.g., 10 dtex, 50 dtex, 100 dtex, 150 dtex, 200 dtex, 250 dtex, 300 dtex, 350 dtex, 400 dtex, 440 dtex, 500 dtex, 600 dtex, 700 dtex, 800 dtex, 940 dtex).

[0059] In an exemplary embodiment, the first elastic 400 has a stretch range of 100%-400% (eg, 100%, 150%, 200%, 250%, 300%, 350%, 400%).

[0060] In an exemplary embodiment, the second elastic 500 has a stretch range of 100%-400% (eg, 100%, 150%, 200%, 250%, 300%, 350%, 400%).

[0061] In an exemplary embodiment, the elastic layer includes 10-130 (eg, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130) first elastic strands 400 .

[0062] In an exemplary embodiment, the elastic layer includes 10-130 (eg, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130) second elastics 500 .

[0063] In an exemplary embodiment, the first non-woven fabric 100 and the second non-woven fabric 200 are bonded together by a first bonding portion, and the second non-woven fabric 200 and the third non-woven fabric 300 are bonded together by a second bonding portion.

[0064] Figure 3 is a schematic diagram of the internal structure of the second elastic layer for wearable sanitary products provided in an embodiment of the present invention; Figure 4 is a three-dimensional exploded view corresponding to Figure 3; Figure 5 is a schematic diagram of the internal structure of the third elastic layer for wearable sanitary products provided in an embodiment of the present invention; Figure 6 is a three-dimensional exploded view corresponding to Figure 5; Figure 7 is a flow chart of the first method for preparing an elastic layer for wearable sanitary products provided in an embodiment of the present invention; Figure 8 is a flow chart of the second method for preparing an elastic layer for wearable sanitary products provided in an embodiment of the present invention; Figure 9 is a flow chart of the third method for preparing an elastic layer for wearable sanitary products provided in an embodiment of the present invention.

[0065] The embodiments of the present invention further provide three methods for preparing elastic layers for wearable sanitary products. These three methods are described below with reference to the accompanying drawings.

[0066] In one embodiment, as shown in FIG7 , the method for preparing an elastic layer for a wearable hygiene product comprises:

[0067] Step a1) preparing a first non-woven fabric 100 , a second non-woven fabric 200 and a third non-woven fabric 300 .

[0068] Step b1) laying a plurality of first elastic bands 400 on the first non-woven fabric 100, wherein the spacing D1 between two adjacent elastic bands in the plurality of first elastic bands 400 is 0.2 to 12 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm). Preferably, the spacing D1 between two adjacent elastic bands in the plurality of first elastic bands 400 is 2 to 12 mm.

[0069] Step c1) laying a plurality of second elastic bands 500 on the third non-woven fabric 300, wherein the spacing D2 between two adjacent elastic bands in the plurality of second elastic bands 500 is 0.2 to 12 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm). Preferably, the spacing D2 between two adjacent elastic bands in the plurality of second elastic bands 500 is 2 to 12 mm.

[0070] Step d1) laminating the second non-woven fabric 200 on the side of the first non-woven fabric 100 where the first elastic band 400 is laid.

[0071] Step e1) The side of the third non-woven fabric 300 provided with the second elastic band 500 is laminated on the second non-woven fabric, and the projections of the plurality of first elastic bands 400 and the plurality of second elastic bands 500 in the vertical direction are alternately arranged, and the combined spacing D3 of adjacent first elastic bands and second elastic bands is 0.1 to 6 mm (e.g., 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm). Preferably, the combined spacing D3 of adjacent first elastic bands 400 and second elastic bands 500 is 1 to 6 mm.

[0072] At this point, the elastic layer for wearable sanitary products shown in FIG. 1 and FIG. 2 is prepared.

[0073] In an exemplary embodiment, as shown in FIG7 , before laying a plurality of first elastic bands 400 on the first non-woven fabric 100 , the method further includes:

[0074] Step a2) spraying glue on the first elastic band 400 .

[0075] The first elastic band 400 can be bonded to the first non-woven fabric 100 by glue, and the second non-woven fabric 200 is bonded to the first non-woven fabric 100 by glue sprayed on the first elastic band 400 .

[0076] In an exemplary embodiment, as shown in FIG7 , before laying a plurality of second elastic bands 400 on the third non-woven fabric 300 , the method further includes:

[0077] Step a3) Spray glue on the second elastic band 500 .

[0078] The second elastic band 500 can be bonded to the third non-woven fabric 300 by glue, and the second non-woven fabric 200 is bonded to the third non-woven fabric 300 by the glue sprayed on the second elastic band 500 .

[0079] In another embodiment, as shown in FIG8 , a method for preparing an elastic layer for a wearable hygiene product comprises:

[0080] Step a1) preparing a first non-woven fabric 100 , a second non-woven fabric 200 and a third non-woven fabric 300 .

[0081] Step b2) Laying a plurality of first elastic bands 400 on the first side of the second non-woven fabric 200, laying a plurality of second elastic bands 500 on the second side of the second non-woven fabric 200, and laying a plurality of first elastic bands 400 on the second side of the second non-woven fabric 200. The distance D1 between two adjacent elastic bands in the plurality of second elastic bands 500 is 0.2 to 12 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm). The distance D2 between two adjacent elastic bands in the plurality of second elastic bands 500 is 0.2 to 12 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm). The projections of the plurality of first rubber bands 400 and the plurality of second rubber bands 500 in the vertical direction are alternately arranged, and the combined spacing D3 between adjacent first rubber bands 400 and second rubber bands 500 is 0.1 to 6 mm (for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm). Preferably, the distance D1 between two adjacent elastic bands in the plurality of first elastic bands 400 is 2 to 12 mm, the distance D2 between two adjacent elastic bands in the plurality of second elastic bands 500 is 2 to 12 mm, and the combined distance D3 between adjacent first and second elastic bands 400 and 500 is 1 to 6 mm.

[0082] Step c2) laminating the second non-woven fabric 200 on the first non-woven fabric 100 .

[0083] Step d2) stacking the third non-woven fabric layer 300 on the second non-woven fabric 200 .

[0084] At this point, the elastic layer for the wearable sanitary product shown in FIG. 3 and FIG. 4 is prepared.

[0085] In an exemplary embodiment, as shown in FIG8 , before laying a plurality of first elastic bands 400 on the first side of the second non-woven fabric 200, the method further includes:

[0086] Step a4) spraying glue on the first elastic band 400 .

[0087] The first elastic band 400 can be bonded to the first side of the second non-woven fabric 200 by glue, and the second non-woven fabric 200 is bonded to the first non-woven fabric 100 by the glue sprayed on the first elastic band 400 .

[0088] In an exemplary embodiment, as shown in FIG8 , before laying a plurality of second elastic bands 500 on the second side of the second non-woven fabric 200, the method further includes:

[0089] Step a5) Spray glue on the second elastic band 500 .

[0090] The second elastic band 500 can be bonded to the second side of the second non-woven fabric 200 by glue, and the second non-woven fabric 200 is bonded to the third non-woven fabric 300 by the glue sprayed on the second elastic band 500 .

[0091] In yet another embodiment, as shown in FIG9 , a method for preparing an elastic layer for a wearable hygiene product comprises:

[0092] Step a1) preparing a first non-woven fabric 100 , a second non-woven fabric 200 and a third non-woven fabric 300 .

[0093] Step b3) laying a plurality of first elastic bands 400 on the first nonwoven fabric 100, wherein the spacing D1 between two adjacent elastic bands in the plurality of first elastic bands 400 is 0.2 to 12 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm). Preferably, the spacing D1 between two adjacent elastic bands in the plurality of first elastic bands 400 is 2 to 12 mm.

[0094] Step c3) laminating the second non-woven fabric 200 on the first non-woven fabric 100 .

[0095] Step d3) laying a plurality of second elastic bands 500 on the second non-woven fabric 200, wherein the spacing D2 between two adjacent elastic bands in the plurality of second elastic bands 500 is 0.2 to 12 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm , 10mm, 11mm, 12mm), and the projections of the plurality of first elastic bands 400 and the plurality of second elastic bands 500 in the vertical direction are alternately arranged, and the combined spacing D3 of adjacent first elastic bands 400 and second elastic bands 500 is 0.1 to 6mm (for example, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm). Preferably, the spacing D2 between two adjacent elastic bands in the plurality of second elastic bands 500 is 2 to 12mm, and the combined spacing D3 of adjacent first elastic bands 400 and second elastic bands 500 is 1 to 6mm.

[0096] Step e3) laminating the third non-woven fabric 300 on the second non-woven fabric 200 .

[0097] At this point, the elastic layer for the wearable sanitary product shown in FIG. 5 and FIG. 6 is prepared.

[0098] In an exemplary embodiment, as shown in FIG9 , before laying a plurality of first elastic bands 400 on the first non-woven fabric 100 , the method further includes:

[0099] Step a6) Spray glue on the first elastic band 400 .

[0100] The first elastic band 400 can be bonded to the first non-woven fabric 100 by glue, and the second non-woven fabric 200 is bonded to the first non-woven fabric 100 by glue sprayed on the first elastic band 400 .

[0101] In an exemplary embodiment, as shown in FIG9 , before laying a plurality of second elastic bands 500 on the second non-woven fabric 200 , the method further includes:

[0102] Step a7) Spray glue on the second elastic band 500 .

[0103] The second elastic band 500 can be bonded to the second non-woven fabric 200 by glue, and the third non-woven fabric 300 is bonded to the second non-woven fabric 200 by glue sprayed on the second elastic band 500 .

[0104] An embodiment of the present invention further provides a wearable sanitary product, which includes the elastic layer for wearable sanitary products.

[0105] For convenience of explanation and precise definition of the appended claims, the terms "upper", "lower", "inner", "outer", "above", "below", "upper", "lower", "upward", "downward", "front", "back", "behind", "inside", "outside", "inward", "outward", "inner", "exterior", "inner", "external", "forward", and "backward" are used to describe the features of the exemplary embodiments with reference to the positions of such features as shown in the accompanying drawings.

[0106] The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. The foregoing descriptions are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described to illustrate the specific principles of the invention and their practical application, thereby enabling others skilled in the art to make and utilize the various exemplary embodiments of the invention and their various alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An elastic layer for a wearable sanitary product, comprising: A first nonwoven fabric, a second nonwoven fabric and a third nonwoven fabric stacked in sequence; A plurality of first elastic bands are arranged between the first non-woven fabric and the second non-woven fabric, and the distance between two adjacent elastic bands in the plurality of first elastic bands is 0.2 to 12 mm; as well as A plurality of second elastic bands are arranged between the second non-woven fabric and the third non-woven fabric, and the distance between two adjacent elastic bands in the plurality of second elastic bands is 0.2 to 12 mm; The projections of the plurality of first elastic bands and the plurality of second elastic bands in the up-down direction are arranged alternately, so that the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm.

2. The elastic layer for wearable sanitary products according to claim 1, wherein: The plurality of first rubber bands are distributed at equal intervals, and the plurality of second rubber bands are distributed at equal intervals.

3. The elastic layer for wearable sanitary products according to claim 2, wherein: The first elastic cord has an average dtex of 10 dtex to 940 dtex, and the second elastic cord has an average dtex of 10 dtex to 940 dtex.

4. The elastic layer for wearable sanitary products according to claim 3, wherein: The first elastic band has a stretching range of 100%-400%, and the second elastic band has a stretching range of 100%-400%.

5. The elastic layer for wearable sanitary products according to claim 1, wherein: The first nonwoven fabric and the second nonwoven fabric are bonded together via a first bonding portion, and the second nonwoven fabric and the third nonwoven fabric are bonded together via a second bonding portion.

6. A method for preparing an elastic layer for a wearable hygiene product, wherein: include: preparing a first nonwoven fabric, a second nonwoven fabric, and a third nonwoven fabric; Laying a plurality of first elastic bands on the first non-woven fabric, wherein the distance between two adjacent elastic bands in the plurality of first elastic bands is 0.2 to 12 mm; Laying a plurality of second elastic bands on the third non-woven fabric, wherein the distance between two adjacent elastic bands in the plurality of second elastic bands is 0.2 to 12 mm; Laying a second nonwoven fabric on the side of the first nonwoven fabric on which the first elastic band is laid; The side of the third nonwoven fabric with the second elastic band is stacked on the second nonwoven fabric, and the projections of the first elastic bands and the second elastic bands in the vertical direction are alternately arranged, and the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm.

7. The method for preparing an elastic layer for wearable sanitary products according to claim 6, wherein: Before laying a plurality of first elastic bands on the first nonwoven fabric, the method further comprises: Spray glue on the first elastic band; The first elastic band can be bonded to the first non-woven fabric by glue, and the second non-woven fabric is bonded to the first non-woven fabric by glue sprayed on the first elastic band.

8. The method for preparing an elastic layer for wearable sanitary products according to claim 6, wherein: Before laying a plurality of second elastic bands on the third nonwoven fabric, the method further comprises: Spray glue onto the second elastic band; The second elastic band can be bonded to the third non-woven fabric by glue, and the second non-woven fabric is bonded to the third non-woven fabric by the glue sprayed on the second elastic band.

9. A method for preparing an elastic layer for a wearable hygiene product, wherein: include: preparing a first nonwoven fabric, a second nonwoven fabric, and a third nonwoven fabric; A plurality of first elastic bands are laid on a first side of the second non-woven fabric, and a plurality of second elastic bands are laid on a second side of the second non-woven fabric, wherein the spacing between two adjacent elastic bands in the plurality of first elastic bands is 0.2 to 12 mm, and the spacing between two adjacent elastic bands in the plurality of second elastic bands is 0.2 to 12 mm, and the projections of the plurality of first elastic bands and the plurality of second elastic bands in the up-down direction are alternately arranged, and the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm; laminating a second nonwoven fabric on the first nonwoven fabric; The third nonwoven fabric is laminated on the second nonwoven fabric.

10. The method for preparing an elastic layer for wearable sanitary products according to claim 9, wherein: Before laying a plurality of first elastic bands on the first side of the second non-woven fabric, the method further comprises: Spray glue on the first elastic band; The first elastic band can be bonded to the first side of the second non-woven fabric by glue, and the second non-woven fabric is bonded to the first non-woven fabric by glue sprayed on the first elastic band.

11. The method for preparing an elastic layer for a wearable sanitary product according to claim 9, wherein: Before laying a plurality of second elastic bands on the second side of the second non-woven fabric, the method further comprises: Spray glue onto the second elastic band; The second elastic band can be bonded to the second side of the second non-woven fabric by glue, and the second non-woven fabric is bonded to the third non-woven fabric by glue sprayed on the second elastic band.

12. A method for preparing an elastic layer for a wearable sanitary product, wherein: include: preparing a first nonwoven fabric, a second nonwoven fabric, and a third nonwoven fabric; Laying a plurality of first elastic bands on the first non-woven fabric, wherein the distance between two adjacent elastic bands in the plurality of first elastic bands is 0.2 to 12 mm; laminating a second nonwoven fabric on the first nonwoven fabric; Laying a plurality of second elastic bands on the second non-woven fabric, wherein the spacing between two adjacent elastic bands in the plurality of second elastic bands is 0.2 to 12 mm, and the projections of the plurality of first elastic bands and the plurality of second elastic bands in the vertical direction are alternately arranged, and the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm; The third nonwoven fabric is laminated on the second nonwoven fabric.

13. The method for preparing an elastic layer for a wearable sanitary product according to claim 12, wherein: Before laying a plurality of first elastic bands on the first nonwoven fabric, the method further comprises: Spray glue on the first elastic band; The first elastic band can be bonded to the first non-woven fabric by glue, and the second non-woven fabric is bonded to the first non-woven fabric by glue sprayed on the first elastic band.

14. The method for preparing an elastic layer for wearable sanitary products according to claim 12, wherein: Before laying a plurality of second elastic bands on the second nonwoven fabric, the method further comprises: Spray glue onto the second elastic band; The second elastic band can be bonded to the second non-woven fabric by glue, and the third non-woven fabric is bonded to the second non-woven fabric by glue sprayed on the second elastic band.

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