Elastic layer for wearable sanitary product, and preparation method therefor

Abstract

The present invention relates to an elastic layer for a wearable sanitary product, and a preparation method therefor. The elastic layer for a wearable sanitary product comprises: N layers of base materials which are stacked in sequence, wherein N is an integer greater than or equal to 3; and (N-1) groups of rubber bands, wherein each group of rubber bands among the (N-1) groups of rubber bands comprises a plurality of rubber bands. One group of rubber bands is provided between two adjacent layers of base materials; and the distance between two adjacent rubber bands in each group of rubber bands ranges from 0.2 mm to 12 mm, the projections of two adjacent groups of rubber bands being staggered in a vertical direction, such that the combined distance between adjacent rubber bands ranges from 0.1 mm to 6 mm. According to the elastic layer for a wearable sanitary product of the present invention, by means of the projections of at least two groups of rubber bands being staggered in the vertical direction, the precision requirements for a spray-coating device are reduced while the manufactured elastic layer satisfies a smaller distance, thus reducing the cost and difficulty of spray-coating when manufacturing an elastic layer.

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 base materials on either side, with multiple rubber bands added between them. To ensure the elastic effect, manufacturers minimize the spacing between the rubber bands. However, when making the elastic layer, each rubber band typically needs to be sprayed with glue. This is done by placing multiple rubber bands into the gaps of a dedicated spraying device, with one rubber band placed in each gap. The spray gun then sprays the rubber 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 staggering 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: N layers of base material stacked sequentially, where N is an integer greater than or equal to 3; and (N-1) groups of rubber bands, each group of the (N-1) groups of rubber bands comprising a plurality of rubber bands; wherein a group of rubber bands is disposed between two adjacent layers of base material, and the spacing between two adjacent rubber bands in each group of rubber bands is 0.2 to 12 mm, and the projections of the two adjacent groups of rubber bands in the vertical direction are staggered such that the combined spacing between adjacent rubber bands is 0.1 to 6 mm.

[0009] Preferably, the elastic layer for wearable sanitary products includes: a first base material, a second base material and a third base material stacked in sequence; a plurality of first rubber bands constituting a first group of rubber bands, the plurality of first rubber bands being arranged between the first base material and the second base material, and the spacing between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; and a plurality of second rubber bands constituting a second group of rubber bands, the plurality of second rubber bands being arranged between the second base material and the third base material, and the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; wherein the projections of the plurality of first rubber bands and the plurality of second rubber bands in the upper and lower directions are staggered so that the combined spacing between adjacent first rubber bands and second rubber bands is 0.1 to 6 mm.

[0010] Preferably, the elastic layer for wearable sanitary products includes: a first base material, a second base material, a third base material and a fourth base material stacked in sequence; a plurality of first rubber bands constituting a first group of rubber bands, the plurality of first rubber bands being arranged between the first base material and the second base material, and the spacing between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; a plurality of second rubber bands constituting a second group of rubber bands, the plurality of second rubber bands being arranged between the second base material and the third base material, and the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; and a plurality of third rubber bands constituting a third group of rubber bands, the plurality of third rubber bands being arranged between the third base material and the fourth base material, and the spacing between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm; wherein the projections of the plurality of first rubber bands, the plurality of second rubber bands and the plurality of third rubber bands in the upper and lower directions are staggered so that the combined spacing between adjacent rubber bands is 0.1 to 6 mm.

[0011] Preferably, the elastic layer for a wearable sanitary product comprises: a first base material, a second base material, a third base material, a fourth base material, and a fifth base material stacked in sequence; a plurality of first elastic bands constituting a first group of elastic bands, the plurality of first elastic bands being disposed between the first base material and the second base material, and a spacing between two adjacent elastic bands in the plurality of first elastic bands being 0.2 to 12 mm; and a plurality of second elastic bands constituting a second group of elastic bands, the plurality of second elastic bands being disposed between the second base material and the third base material, and a spacing between two adjacent elastic bands in the plurality of second elastic bands being 0.2 to 12 mm. A plurality of third rubber bands constitute a third group of rubber bands, the plurality of third rubber bands are arranged between the third base material and the fourth base material, and the spacing between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm; a plurality of fourth rubber bands constitute a fourth group of rubber bands, the plurality of fourth rubber bands are arranged between the fourth base material and the fifth base material, and the spacing between two adjacent rubber bands in the plurality of fourth rubber bands is 0.2 to 12 mm; wherein the projections of the plurality of first rubber bands, the plurality of second rubber bands, the plurality of third rubber bands, and the plurality of fourth rubber bands in the vertical direction are staggered so that the combined spacing between adjacent rubber bands is 0.1 to 6 mm.

[0012] Preferably, the plurality of first elastic bands are distributed at equal intervals, and the plurality of second elastic bands are distributed at equal intervals.

[0013] Preferably, the plurality of first elastic bands are distributed at equal intervals, the plurality of second elastic bands are distributed at equal intervals, and the plurality of third elastic bands are distributed at equal intervals.

[0014] Preferably, the plurality of first elastic bands are distributed at equal intervals, the plurality of second elastic bands are distributed at equal intervals, the plurality of third elastic bands are distributed at equal intervals, and the plurality of fourth elastic bands are distributed at equal intervals.

[0015] Preferably, the elastic has an average decitex of 10 dtex to 440 dtex.

[0016] Preferably, at least one of the (N-2) layers of base material in the N layers of base material is a discontinuous base material.

[0017] 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 N layers of base material, where N is an integer greater than or equal to 3; forming a group of rubber bands between any two adjacent layers of base material, each group of rubber bands comprising a plurality of rubber bands, and the spacing between two adjacent rubber bands in each group of rubber bands being 0.2 to 12 mm; and sequentially stacking the N layers of base material, with the projections of (N-1) groups of rubber bands in the vertical direction being staggered, and the combined spacing between adjacent rubber bands being 0.1 to 6 mm.

[0018] Preferably, before forming a group of rubber bands between any two adjacent layers of base materials, the method further comprises: spraying glue on the plurality of rubber bands; wherein the rubber bands can be bonded to the two adjacent layers of base materials by the glue, and each layer of base material is bonded to the adjacent base material by the glue sprayed on the rubber bands.

[0019] Preferably, before forming a group of rubber bands between any two adjacent layers of base materials, the method further comprises: spraying glue on one of the surfaces of the two adjacent layers of base materials that are in contact with each other; wherein the rubber band can be bonded to the two adjacent layers of base materials by the glue, and the two adjacent layers of base materials are bonded by the glue.

[0020] Preferably, the method for preparing an elastic layer for a wearable sanitary product includes: preparing three layers of base material, the three layers of base material including a first base material, a second base material and a third base material; laying a plurality of first rubber bands on the upper surface of the first base material, wherein the spacing between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; laying a plurality of second rubber bands on the lower surface of the third base material, wherein the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; laminating the second base material on the side of the first base material on which the first rubber bands are laid; laminating the side of the third base material on which the second rubber bands are laid, and staggering the projections of the plurality of first rubber bands and the plurality of second rubber bands in the upper and lower directions, wherein the combined spacing between adjacent first rubber bands and second rubber bands is 0.1 to 6 mm.

[0021] Preferably, the method for preparing an elastic layer for a wearable sanitary product comprises: preparing three layers of base material, the three layers of base material comprising a first base material, a second base material, and a third base material; laying a plurality of first rubber bands on the lower surface of the second base material, and laying a plurality of second rubber bands on the upper surface of the second base material, wherein the spacing between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm, and the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm, the projections of the plurality of first rubber bands and the plurality of second rubber bands in the upper and lower directions are staggered, and the combined spacing between adjacent first rubber bands and second rubber bands is 0.1 to 6 mm; laminating the second base material on the first base material; and laminating the third base material on the second base material.

[0022] Preferably, the method for preparing an elastic layer for a wearable sanitary product comprises: preparing three layers of base material, the three layers of base material comprising a first base material, a second base material, and a third base material; laying a plurality of first rubber bands on the upper surface of the first base material, wherein the spacing between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; laminating the second base material on the first base material; laying a plurality of second rubber bands on the upper surface of the second base material, wherein the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm, and the projections of the plurality of first rubber bands and the plurality of second rubber bands in the upper and lower directions are staggered, and the combined spacing between adjacent first rubber bands and second rubber bands is 0.1 to 6 mm; and laminating the third base material on the second base material.

[0023] Preferably, the method for preparing an elastic layer for a wearable sanitary product comprises: preparing four layers of base materials, the four layers of base materials comprising a first base material, a second base material, a third base material, and a fourth base material; laying a plurality of first rubber bands on the upper surface of the first base material, wherein the spacing between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; laying a plurality of second rubber bands on the lower surface of the third base material, and laying a plurality of third rubber bands on the upper surface of the third base material, wherein the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm, and the spacing between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm; laminating the second base material on the first base material; laminating the side of the third base material on which the second rubber bands are laid on the second base material; and laminating the fourth base material on the third base material, and staggering the projections of the plurality of first rubber bands, the plurality of second rubber bands, and the plurality of third rubber bands in the upper and lower directions, wherein the combined spacing between adjacent first rubber bands, second rubber bands, and third rubber bands is 0.1 to 6 mm.

[0024] Preferably, the method for preparing an elastic layer for a wearable sanitary product comprises: preparing four layers of base materials, the four layers of base materials comprising a first base material, a second base material, a third base material, and a fourth base material; laying a plurality of first rubber bands on the lower surface of the second base material, laying a plurality of second rubber bands on the upper surface of the second base material, laying a plurality of third rubber bands on the lower surface of the third base material, and laying a plurality of fourth rubber bands on the upper surface of the fourth base material, wherein the spacing between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm, the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm, and the spacing between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm, the projections of the plurality of first rubber bands, the plurality of second rubber bands, and the plurality of third rubber bands in the upper and lower directions are staggered, and the combined spacing between adjacent first rubber bands, second rubber bands, and third rubber bands is 0.1 to 6 mm; laminating the second base material on the first base material; laminating the third base material on the second base material; and laminating the fourth base material on the third base material.

[0025] Preferably, the method for preparing an elastic layer for a wearable sanitary product comprises: preparing four layers of base materials, the four layers of base materials comprising a first base material, a second base material, a third base material, and a fourth base material; laying a plurality of first rubber bands on the upper surface of the first base material, wherein the spacing between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; laminating the second base material on the first base material; laying a plurality of second rubber bands on the upper surface of the second base material, wherein the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; laminating the third base material on the second base material; laying a plurality of third rubber bands on the upper surface of the third base material, wherein the spacing between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm, the projections of the plurality of first rubber bands, the plurality of second rubber bands, and the plurality of third rubber bands in the upper and lower directions are staggered, and the combined spacing between adjacent first rubber bands, second rubber bands, and third rubber bands is 0.1 to 6 mm; and laminating the fourth base material on the third base material.

[0026] Preferably, the method for preparing an elastic layer for a wearable sanitary product comprises: preparing five layers of base materials, the five layers of base materials comprising a first base material, a second base material, a third base material, a fourth base material, and a fifth base material; laying a plurality of first elastic bands on the upper surface of the first base material, wherein the spacing between two adjacent elastic bands in the plurality of first elastic bands is 0.2 to 12 mm; laminating the second base material on the first base material; laying a plurality of second elastic bands on the upper surface of the second base material, wherein the spacing between two adjacent elastic bands in the plurality of second elastic bands is 0.2 to 12 mm; laminating the third base material on the second base material. on; laying multiple third rubber bands on the upper surface of the third base material, with a spacing between two adjacent third rubber bands being 0.2 to 12 mm; laminating a fourth base material on the third base material; laying multiple fourth rubber bands on the upper surface of the fourth base material, with a spacing between two adjacent fourth rubber bands being 0.2 to 12 mm, the projections of the multiple first rubber bands, the multiple second rubber bands, the multiple third rubber bands and the multiple fourth rubber bands in the upper and lower directions are staggered, and the combined spacing between adjacent first rubber bands, second rubber bands, third rubber bands and fourth rubber bands is 0.1 to 6 mm; laminating a fifth base material on the fourth base material.

[0027] The elastic layer for wearable sanitary products of the present invention is staggered by projections of at least two groups of elastic bands in the upper and lower directions, so that the elastic layer can meet the smaller spacing while reducing the precision requirements of the spraying device, thereby reducing the cost and difficulty of spraying during the production process.

[0028] 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

[0029] FIG1A 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;

[0030] FIG1B is an exploded perspective view corresponding to FIG1A ;

[0031] FIG2A 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;

[0032] FIG2B is a perspective exploded view corresponding to FIG2A ;

[0033] FIG3A 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;

[0034] FIG3B is a perspective exploded view corresponding to FIG3A ;

[0035] FIG4 is a schematic diagram of the internal structure of a fourth elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0036] FIG5A is a schematic diagram of the internal structure of a fifth elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0037] FIG5B is a schematic diagram of the internal structure of a sixth elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0038] FIG5C is a schematic diagram of the internal structure of a seventh elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0039] FIG5D is a schematic diagram of the internal structure of an elastic layer for a wearable sanitary product according to an eighth embodiment of the present invention;

[0040] FIG5E is a schematic diagram of the internal structure of a ninth elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0041] FIG5F is a schematic diagram of the internal structure of a tenth elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0042] FIG5G is a schematic diagram of the internal structure of an eleventh elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0043] FIG5H is a schematic diagram of the internal structure of a twelfth elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0044] FIG5I is a schematic diagram of the internal structure of a thirteenth elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0045] FIG6 is a schematic diagram of the internal structure of a fourteenth elastic layer for a wearable sanitary product provided by an embodiment of the present invention;

[0046] FIG7A is a schematic diagram 1 of a discontinuous base material;

[0047] FIG7B is a second schematic diagram of a discontinuous base material;

[0048] FIG8 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;

[0049] FIG9 is a schematic flow chart of a second method for preparing an elastic layer for wearable sanitary products provided in an embodiment of the present invention.

[0050] Description of reference numerals:

[0051] 101: First base material 102: Second base material

[0052] 103: Third base material 104: Fourth base material

[0053] 105: Fifth base material

[0054] 201: First rubber band 202: Second rubber band

[0055] 203: The third rubber band 204: The fourth rubber band.

[0056] 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.

[0057] 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

[0058] 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.

[0059] 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.

[0060] 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.

[0061] The embodiments of Figures 1A to 4 all include three layers of base material and two sets of elastics.

[0062] The embodiments of Figures 5A to 5I all include four layers of base material and three sets of elastics.

[0063] The embodiment of FIG. 6 includes five layers of base material and four sets of elastics.

[0064] The embodiments of FIG. 1A , FIG. 2A , FIG. 3A , FIG. 4 , FIG. 5A to FIG. 5I , and FIG. 6 are all cross-sectional views.

[0065] The elastic layer for a wearable sanitary product according to an embodiment of the present invention will be described below with reference to FIG. 1A to FIG. 6 .

[0066] The elastic layer for wearable sanitary products according to the embodiment of the present invention comprises: N layers of base material and (N-1) groups of elastic bands.

[0067] N layers of base materials are stacked in sequence, where N is an integer greater than or equal to 3. Each of the (N-1) groups of rubber bands comprises a plurality of rubber bands.

[0068] A group of rubber bands is arranged between two adjacent layers of base material, and the spacing between two adjacent rubber bands in each group of rubber bands is 0.2 to 12 mm. The projections of the two adjacent groups of rubber bands in the upper and lower directions are staggered, so that the combined spacing between adjacent rubber bands is 0.1 to 6 mm.

[0069] The elastic layer for wearable sanitary products according to the embodiment of the present invention is staggered by projections of at least two groups of rubber bands in the upper and lower directions, so that the elastic layer can meet the smaller spacing while reducing the precision requirements of the spraying device, thereby reducing the cost and difficulty of spraying during the production process.

[0070] Example 1

[0071] FIG1A 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; FIG1B is a three-dimensional exploded view corresponding to FIG1A .

[0072] As shown in FIG. 1A and FIG. 1B , the elastic layer for a wearable sanitary product of Example 1 includes: a first base material 101 , a second base material 102 , a third base material 103 , a plurality of first elastic bands 201 , and a plurality of second elastic bands 202 .

[0073] The first base material 101 , the second base material 102 and the third base material 103 are stacked in sequence.

[0074] The plurality of first elastic cords 201 constitute a first group of elastic cords. The plurality of first elastic cords 201 are disposed between the first base material 101 and the second base material 102. The spacing D1 between two adjacent elastic cords in the plurality of first elastic cords 201 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, or 12 mm). Preferably, the spacing D1 between two adjacent elastic cords in the plurality of first elastic cords 201 is 2 to 12 mm.

[0075] The plurality of second elastic cords 202 constitute a second group of elastic cords. The plurality of second elastic cords 202 are disposed between the second base material 102 and the third base material 103. The spacing D2 between two adjacent elastic cords in the plurality of second elastic cords 202 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, or 12 mm). Preferably, the spacing D2 between two adjacent elastic cords in the plurality of second elastic cords 202 is 2 to 12 mm.

[0076] The projections of the plurality of first elastic bands 201 and the plurality of second elastic bands 202 in the vertical direction are staggered so that the combined spacing D0 of adjacent first elastic bands 201 and second elastic bands 202 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 D0 of adjacent first elastic bands 201 and second elastic bands 202 is 1 to 6 mm.

[0077] In Example 1, the projections of the first elastic cords 201 and the second elastic cords 202 are staggered in the vertical direction, so that the elastic layer can meet the smaller spacing while reducing the precision requirement of the spraying device, thereby reducing the cost and difficulty of spraying during the production process.

[0078] 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.

[0079] When the implementation scheme of Example 1 is adopted, the spacing between adjacent first rubber bands 201 and second rubber bands 202 is also 3 mm (i.e., D0 is 3 mm). Since the projections of the plurality of first rubber bands 201 and the plurality of second rubber bands 202 in the vertical direction are staggered, only the spacing between two adjacent rubber bands among the plurality of first rubber bands 201 needs to be 6 mm (i.e., D1 is 6 mm), and only the spacing between two adjacent rubber bands among the plurality of second rubber bands 202 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.

[0080] In an exemplary embodiment, the first base material 101 / the second base material 102 / the third base material 103 can be non-woven fabrics, such as spunlace fabrics, spunbond fabrics or spunmelt fabrics.

[0081] When the diaper is worn on a person, the first base material 101, the second base material 102, the third base material 103, the first elastic bands 201 and the second elastic bands 202 of the elastic layer of the wearable sanitary product extend along the circumference of the waist of the human body.

[0082] It should be noted that Figures 1A to 6 of the present invention merely illustrate the general shapes of the layers and the approximate positional relationships between them. To better distinguish the boundaries between the layers, gaps are shown between the layers in Figures 1A to 6. However, in actual products, there are no gaps between the first base material 101, the second base material 102, and the third base material 103; instead, they are bonded together.

[0083] In an exemplary embodiment, the peel strength between the first base material 101 and the second base material 102 is from 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).

[0084] In an exemplary embodiment, the peel strength between the second base material 102 and the third base material 103 is from 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).

[0085] In an exemplary embodiment, glue is sprayed on the first elastic band 201. The first base material 101 is bonded to the second base material 102 by the glue sprayed on the first elastic band 201.

[0086] In an exemplary embodiment, glue is sprayed on the second elastic band 202. The second base material 102 is bonded to the third base material 103 by the glue sprayed on the second elastic band 202.

[0087] In addition to bonding by glue, the first elastic band 201, the first base material 101 and the second base material 102, as well as the second elastic band 202, the second base material 102 and the third base material 103 can also be bonded together by ultrasonic welding.

[0088] In one embodiment, as shown in Figure 1A, the plurality of first elastic bands 201 are distributed at equal intervals. In another embodiment, the plurality of first elastic bands 201 may also be distributed at non-equal intervals (not shown in the figure).

[0089] In one embodiment, as shown in Figure 1A, the plurality of second elastic bands 202 are distributed at equal intervals. In another embodiment, the plurality of second elastic bands 202 may also be distributed at non-equal intervals (not shown in the figure).

[0090] In an exemplary embodiment, the first elastic cord 201 has an average decitex of 10 dtex-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 cord 202 has an average decitex of 10 dtex-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).

[0091] In an exemplary embodiment, the first elastic 201 has a stretch range of 100%-400% (eg, 100%, 150%, 200%, 250%, 300%, 350%, 400%).

[0092] In an exemplary embodiment, the second elastic 202 has a stretch range of 100%-400% (eg, 100%, 150%, 200%, 250%, 300%, 350%, 400%).

[0093] In an exemplary embodiment, the elastic layer includes 10-130 (e.g., 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130) first elastic strands 201 .

[0094] In an exemplary embodiment, the elastic layer includes 10-130 (e.g., 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130) second elastics 202 .

[0095] In an exemplary embodiment, the first base material 101 and the second base material 102 are bonded together by a first bonding portion, and the second base material 102 and the third base material 103 are bonded together by a second bonding portion.

[0096] Example 2

[0097] FIG2A 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; FIG2B is a three-dimensional exploded view corresponding to FIG2A .

[0098] As shown in FIG. 1A and FIG. 1B , the elastic layer for a wearable sanitary product according to Example 2 includes: a first base material 101 , a second base material 102 , a third base material 103 , a plurality of first elastic bands 201 , and a plurality of second elastic bands 202 .

[0099] Example 3

[0100] FIG3A is a schematic diagram of the internal structure of a first elastic layer for a wearable sanitary product provided in an embodiment of the present invention; FIG3B is a three-dimensional exploded view corresponding to FIG3A .

[0101] As shown in FIG3A and FIG3B , the elastic layer for a wearable sanitary product according to Example 3 includes: a first base material 101 , a second base material 102 , a third base material 103 , a plurality of first elastic bands 201 , and a plurality of second elastic bands 202 .

[0102] Example 4

[0103] FIG4 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.

[0104] As shown in FIG4 , the elastic layer for a wearable sanitary product according to Example 4 includes: a first base material 101 , a second base material 102 , a third base material 103 , a plurality of first elastic bands 201 and a plurality of second elastic bands 202 .

[0105] In the finished product of the elastic layer, the layered structures of Example 1, Example 2, Example 3, and Example 4 are the same, and the only difference is the order of the preparation method. The difference will be described in detail in the preparation method below.

[0106] Example 5

[0107] As shown in FIG5A , the elastic layer for a wearable sanitary product of Example 5 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0108] The first base material 101 , the second base material 102 , the third base material 103 and the fourth base material 104 are stacked in sequence.

[0109] The plurality of first rubber bands 201 constitute a first group of rubber bands. The plurality of first rubber bands 201 are disposed between the first base material 101 and the second base material 102 , and a distance between two adjacent rubber bands in the plurality of first rubber bands 201 is 0.2 to 12 mm.

[0110] The plurality of second rubber bands 202 constitute a second group of rubber bands. The plurality of second rubber bands 202 are disposed between the second base material 102 and the third base material 103 , and a distance between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0111] The plurality of third rubber bands 203 constitute a third group of rubber bands. The plurality of third rubber bands 203 are disposed between the third base material 103 and the fourth base material 104 , and a distance between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0112] The projections of the plurality of first rubber bands 201 , the plurality of second rubber bands 202 and the plurality of third rubber bands 203 in the vertical direction are staggered, so that the combined spacing D0 between adjacent rubber bands is 0.1 to 6 mm.

[0113] Example 6

[0114] As shown in FIG5B , the elastic layer for a wearable sanitary product of Example 6 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0115] Example 7

[0116] As shown in FIG5C , the elastic layer for a wearable sanitary product of Example 7 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0117] Example 8

[0118] As shown in FIG5D , the elastic layer for a wearable sanitary product of Example 8 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0119] Example 9

[0120] As shown in FIG5E , the elastic layer for a wearable sanitary product of Example 9 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0121] Example 10

[0122] As shown in FIG5F , the elastic layer for a wearable sanitary product of Example 10 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0123] Example 11

[0124] As shown in FIG5G , the elastic layer for a wearable sanitary product of Example 11 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0125] Example 12

[0126] As shown in FIG5H , the elastic layer for a wearable sanitary product of Example 12 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0127] In the finished product of the elastic layer, the layered structures of Examples 5 to 12 are the same, and the only difference is the order of the preparation method. The difference will be described in detail in the preparation method below.

[0128] Example 13

[0129] As shown in FIG5I , the elastic layer for a wearable sanitary product of Example 13 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , and a plurality of third elastic bands 203 .

[0130] The first base material 101 , the second base material 102 , the third base material 103 and the fourth base material 104 are stacked in sequence.

[0131] The plurality of first rubber bands 201 constitute a first group of rubber bands. The plurality of first rubber bands 201 are disposed between the first base material 101 and the second base material 102 , and a distance between two adjacent rubber bands in the plurality of first rubber bands 201 is 0.2 to 12 mm.

[0132] The plurality of second rubber bands 202 constitute a second group of rubber bands. The plurality of second rubber bands 202 are disposed between the second base material 102 and the third base material 103 , and a distance between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0133] The plurality of third rubber bands 203 constitute a third group of rubber bands. The plurality of third rubber bands 203 are disposed between the third base material 103 and the fourth base material 104 , and a distance between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0134] The projections of the plurality of first rubber bands 201 , the plurality of second rubber bands 202 and the plurality of third rubber bands 203 in the vertical direction are staggered, so that the combined spacing D0 between adjacent rubber bands is 0.1 to 6 mm.

[0135] The difference between Example 13 and Example 5 is that the number of third elastic bands 203 in Example 13 is less than that in Example 5. This results in multiple combined spacings in Example 13, namely, combined spacings D01 and D02. This embodiment can also vary the final combined spacing, that is, more than one combined spacing can be present in the same elastic layer.

[0136] Example 14

[0137] As shown in FIG6 , the elastic layer for a wearable sanitary product of Example 14 includes: a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 , a fifth base material 105 , a plurality of first elastic bands 201 , a plurality of second elastic bands 202 , a plurality of third elastic bands 203 , and a plurality of fourth elastic bands 204 .

[0138] The first base material 101 , the second base material 102 , the third base material 103 , the fourth base material 104 and the fifth base material 105 are stacked in sequence.

[0139] The plurality of first rubber bands 201 constitute a first group of rubber bands. The plurality of first rubber bands 201 are disposed between the first base material 101 and the second base material 102 , and a distance between two adjacent rubber bands in the plurality of first rubber bands 201 is 0.2 to 12 mm.

[0140] The plurality of second rubber bands 202 constitute a second group of rubber bands. The plurality of second rubber bands 202 are disposed between the second base material 102 and the third base material 103 , and a distance between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0141] The plurality of third rubber bands 203 constitute a third group of rubber bands. The plurality of third rubber bands 203 are disposed between the third base material 103 and the fourth base material 104 , and a distance between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0142] The plurality of fourth rubber bands 204 constitute a fourth group of rubber bands. The plurality of fourth rubber bands 204 are disposed between the fourth base material 104 and the fifth base material 105 . The distance between two adjacent rubber bands in the plurality of fourth rubber bands 204 is 0.2 to 12 mm.

[0143] The projections of the first rubber bands 201 , the second rubber bands 202 , the third rubber bands 203 and the fourth rubber bands 204 in the vertical direction are staggered so that the combined spacing D0 between adjacent rubber bands is 0.1 to 6 mm.

[0144] The material of the base material, the peel strength between adjacent base materials, the average decitex, stretching range and number of rubber bands in Examples 2 to 12 and 14 are similar to those in Example 1 and will not be repeated here.

[0145] In an exemplary embodiment, at least one of the (N-2) layers of base materials in the N layers of base materials is a discontinuous base material.

[0146] FIG7A is a first schematic diagram of a discontinuous base material, and FIG7B is a second schematic diagram of a discontinuous base material. Both FIG7A and FIG7B are viewed from top to bottom.

[0147] Example 15

[0148] In Examples 1 to 14, each layer of base material is a continuous layer. In Example 15, as shown in FIG. 7A and FIG. 7B , the first base material 101 is a discontinuous layer.

[0149] When N is 3, one layer of base material may be discontinuous, which may be the first base material 101 or the second base material 102 or the third base material 103 in FIG. 1A , FIG. 2A , FIG. 3A and FIG. 4 .

[0150] When N is 4, one or two layers of base material may be discontinuous, that is, it may be any one or any two layers of the first base material 101, the second base material 102, the third base material 103, and the fourth base material 104 in Figures 5A to 5I.

[0151] When N is 5, one layer of base material, two layers of base material, or three layers of base material may be discontinuous, that is, it may be any one layer, any two layers, or any three layers of the first base material 101, the second base material 102, the third base material 103, the fourth base material 104, and the fifth base material 105 in Figure 6.

[0152] By analogy, at least one layer of the (N-2) layers of base materials in the N layers of base materials may be a discontinuous base material.

[0153] The extending direction of the breaking line of the discontinuous base material is perpendicular to the extending direction of the elastic band, that is, the extending direction of the multiple segments formed by the same layer of discontinuous base material is perpendicular to the extending direction of the elastic band.

[0154] The number and size of the multiple segments formed by the discontinuous base material may be different. For example, the number and size of the segments formed by the first base material 101 in FIG. 7A and FIG. 7B are different after being broken.

[0155] The embodiment of the present invention further provides a method for preparing an elastic layer for a wearable sanitary product. The relevant preparation method is introduced below with reference to the accompanying drawings.

[0156] In an exemplary embodiment, as shown in FIG8 and FIG9 , a method for preparing an elastic layer for a wearable hygiene product includes:

[0157] Step a1) preparing N layers of base material, where N is an integer greater than or equal to 3.

[0158] Step b1) forms one group of elastic band between any two adjacent base materials, and each group of elastic band comprises multiple elastic bands, and the spacing between two adjacent elastic bands in each group of elastic bands 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 between two adjacent elastic bands in each group of elastic bands is 2 to 12 mm.

[0159] Step c1) sequentially stacking N layers of base material, with (N-1) groups of elastic bands having projections in the vertical direction staggered so that the combined spacing between adjacent 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 is 1 to 6 mm.

[0160] In an exemplary embodiment, as shown in FIG8 , before forming a group of elastic bands between any two adjacent layers of base materials (i.e., step b1), the method further comprises:

[0161] Step a2) Spray glue on the plurality of rubber bands.

[0162] The rubber band can be bonded to two adjacent layers of base materials by glue, and each layer of base material is bonded to the adjacent base materials by the glue sprayed on the rubber band.

[0163] In an exemplary embodiment, as shown in FIG9 , before forming a group of elastic bands between any two adjacent layers of base materials (i.e., step b1), the method further comprises:

[0164] Step a3) spraying glue on one of the surfaces of two adjacent layers of base materials in contact with each other among the N layers of base materials.

[0165] The rubber band can be bonded to the two adjacent layers of base materials by glue, and the two adjacent layers of base materials are bonded by glue.

[0166] Taking three layers of base material and two sets of elastic bands as an example, there are four possible preparation methods.

[0167] The first method involves:

[0168] A three-layer base material is prepared, and the three-layer base material includes a first base material 101 , a second base material 102 and a third base material 103 .

[0169] A plurality of first elastic bands 201 are laid on the upper surface of the first base material 101 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0170] A plurality of second rubber bands 202 are laid on the lower surface of the third base material 103 , and a distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0171] The second base material 102 is laminated on the side of the first base material 101 on which the first elastic cord 201 is laid (ie, the upper surface of the first base material 101 ).

[0172] The side of the third base material 103 with the second elastic band 202 is stacked on the second base material 102, and the projections of the first elastic bands 201 and the second elastic bands 202 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201 and second elastic bands 202 is 0.1 to 6 mm.

[0173] Thus, the elastic layer for wearable sanitary products shown in FIG. 1A is prepared.

[0174] The second method involves:

[0175] A three-layer base material is prepared, and the three-layer base material includes a first base material 101 , a second base material 102 and a third base material 103 .

[0176] A plurality of first rubber bands 201 are laid on the lower surface of the second base material 102, and a plurality of second rubber bands 202 are laid on the upper surface of the second base material 102. The spacing D1 between two adjacent rubber bands in the plurality of first rubber bands 201 is 0.2 to 12 mm, and the spacing D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm. The projections of the plurality of first rubber bands 201 and the plurality of second rubber bands 202 in the vertical direction are staggered, and the combined spacing D0 between adjacent first rubber bands 201 and second rubber bands 202 is 0.1 to 6 mm.

[0177] The second base material 102 is laminated on the first base material 101 .

[0178] The third base material 103 is laminated on the second base material 102 .

[0179] At this point, the elastic layer for the wearable sanitary product shown in FIG. 2A is prepared.

[0180] The third method includes:

[0181] A three-layer base material is prepared, and the three-layer base material includes a first base material 101 , a second base material 102 and a third base material 103 .

[0182] A plurality of first elastic bands 201 are laid on the upper surface of the first base material 101 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0183] The second base material 102 is laminated on the first base material 101 .

[0184] A plurality of second rubber bands 202 are laid on the upper surface of the second base material 102, and the spacing D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm. The projections of the plurality of first rubber bands 201 and the plurality of second rubber bands 202 in the vertical direction are staggered, and the combined spacing D0 between adjacent first rubber bands and second rubber bands is 0.1 to 6 mm.

[0185] The third base material 103 is laminated on the second base material 102 .

[0186] At this point, the elastic layer for the wearable sanitary product shown in FIG3A is prepared.

[0187] The fourth method includes:

[0188] A three-layer base material is prepared, and the three-layer base material includes a first base material 101 , a second base material 102 and a third base material 103 .

[0189] A plurality of first elastic bands 201 are laid on the lower surface of the second base material 102 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0190] A plurality of second rubber bands 202 are laid on the lower surface of the third base material 103 , and a distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0191] The second base material 102 is stacked on the first base material 101, and the third base material 103 is stacked on the second base material 102, so that the projections of the plurality of first elastic bands 201 and the plurality of second elastic bands 202 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201 and second elastic bands 202 is 0.1 to 6 mm.

[0192] At this point, the elastic layer for the wearable sanitary product shown in FIG4 is prepared.

[0193] Taking four layers of base material and three sets of rubber bands as an example, there are eight possible preparation methods.

[0194] The first method involves:

[0195] Four layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 and a fourth base material 104 .

[0196] A plurality of first elastic bands 201 are laid on the upper surface of the first base material 101 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0197] The second base material 102 is laminated on the first base material 101 .

[0198] A plurality of second rubber bands 202 are laid on the upper surface of the second base material 102 , and a distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0199] The third base material 103 is laminated on the second base material 102 .

[0200] A plurality of third elastic bands 203 are laid on the upper surface of the third base material 103, with a spacing D3 between adjacent pairs of the plurality of third elastic bands 203 ranging from 0.2 to 12 mm. The projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202, and the plurality of third elastic bands 203 in the vertical direction are staggered, with a combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202, and third elastic bands 203 ranging from 0.1 to 6 mm.

[0201] The fourth base material 104 is laminated on the third base material 103 .

[0202] At this point, the elastic layer for the wearable sanitary product shown in FIG5A is prepared.

[0203] The second method involves:

[0204] Four layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 and a fourth base material 104 .

[0205] A plurality of first elastic bands 201 are laid on the upper surface of the first base material 101 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0206] The second base material 102 is laminated on the first base material 101 .

[0207] A plurality of second rubber bands 202 are laid on the upper surface of the second base material 102 , and a distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0208] The third base material 103 is laminated on the second base material 102 .

[0209] A plurality of third rubber bands 203 are laid on the lower surface of the fourth base material 104 , and a distance D3 between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0210] The fourth base material 104 is stacked on the third base material 103, and the projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202 and the plurality of third elastic bands 203 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202 and third elastic bands 203 is 0.1 to 6 mm.

[0211] At this point, the elastic layer for the wearable sanitary product shown in FIG5B is prepared.

[0212] The third method includes:

[0213] Four layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 and a fourth base material 104 .

[0214] A plurality of first elastic bands 201 are laid on the upper surface of the first base material 101 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0215] A plurality of second rubber bands 202 are laid on the lower surface of the third base material 103, and a plurality of third rubber bands 203 are laid on the upper surface of the third base material 103. The distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm, and the distance D3 between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0216] The second base material 102 is laminated on the first base material 101 .

[0217] The third base material 103 is laminated on the second base material 102 .

[0218] The fourth base material 104 is stacked on the third base material 103, and the projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202 and the plurality of third elastic bands 203 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202 and third elastic bands 203 is 0.1 to 6 mm.

[0219] At this point, the elastic layer for the wearable sanitary product shown in FIG5C is prepared.

[0220] The fourth method includes:

[0221] Four layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 and a fourth base material 104 .

[0222] A plurality of first elastic bands 201 are laid on the upper surface of the first base material 101 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0223] A plurality of second rubber bands 202 are laid on the lower surface of the third base material 103 , and a distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0224] A plurality of third rubber bands 203 are laid on the lower surface of the fourth base material 104 , and a distance D3 between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0225] The second base material 102 is laminated on the first base material 101 .

[0226] The third base material 103 is laminated on the second base material 102 .

[0227] The fourth base material 104 is stacked on the third base material 103, and the projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202 and the plurality of third elastic bands 203 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202 and third elastic bands 203 is 0.1 to 6 mm.

[0228] At this point, the elastic layer for the wearable sanitary product shown in FIG5D is prepared.

[0229] The fifth method includes:

[0230] Four layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 and a fourth base material 104 .

[0231] A plurality of first rubber bands 201 are laid on the lower surface of the second base material 102, and a plurality of second rubber bands 202 are laid on the upper surface of the second base material 102. The distance D1 between two adjacent rubber bands in the plurality of first rubber bands 201 is 0.2 to 12 mm, and the distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0232] A plurality of third rubber bands 203 are laid on the upper surface of the third base material 103 , and a distance D3 between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0233] The second base material 102 is laminated on the first base material 101 .

[0234] The third base material 103 is laminated on the second base material 102 .

[0235] The fourth base material 104 is stacked on the third base material 103, and the projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202 and the plurality of third elastic bands 203 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202 and third elastic bands 203 is 0.1 to 6 mm.

[0236] At this point, the elastic layer for the wearable sanitary product shown in FIG5E is prepared.

[0237] The sixth method includes:

[0238] Four layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 and a fourth base material 104 .

[0239] A plurality of first rubber bands 201 are laid on the lower surface of the second base material 102, and a plurality of second rubber bands 202 are laid on the upper surface of the second base material 102. The distance D1 between two adjacent rubber bands in the plurality of first rubber bands 201 is 0.2 to 12 mm, and the distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0240] A plurality of third rubber bands 203 are laid on the lower surface of the fourth base material 104 , and a distance D3 between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0241] The second base material 102 is laminated on the first base material 101 .

[0242] The third base material 103 is laminated on the second base material 102 .

[0243] The fourth base material 104 is stacked on the third base material 103, and the projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202 and the plurality of third elastic bands 203 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202 and third elastic bands 203 is 0.1 to 6 mm.

[0244] At this point, the elastic layer for the wearable sanitary product shown in FIG5F is prepared.

[0245] The seventh method includes:

[0246] Four layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 and a fourth base material 104 .

[0247] A plurality of first elastic bands 201 are laid on the lower surface of the second base material 102 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0248] A plurality of second rubber bands 202 are laid on the lower surface of the third base material 103, and a plurality of third rubber bands 203 are laid on the upper surface of the third base material 103. The distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm, and the distance D3 between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0249] The second base material 102 is laminated on the first base material 101 .

[0250] The third base material 103 is laminated on the second base material 102 .

[0251] The fourth base material 104 is stacked on the third base material 103, and the projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202 and the plurality of third elastic bands 203 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202 and third elastic bands 203 is 0.1 to 6 mm.

[0252] At this point, the elastic layer for the wearable sanitary product shown in FIG5G is prepared.

[0253] The eighth method includes:

[0254] Four layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 and a fourth base material 104 .

[0255] A plurality of first elastic bands 201 are laid on the lower surface of the second base material 102 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0256] A plurality of second rubber bands 202 are laid on the lower surface of the third base material 103 , and a distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0257] A plurality of third rubber bands 203 are laid on the lower surface of the fourth base material 104 , and a distance D3 between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0258] The second base material 102 is laminated on the first base material 101 .

[0259] The third base material 103 is laminated on the second base material 102 .

[0260] The fourth base material 104 is stacked on the third base material 103, and the projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202 and the plurality of third elastic bands 203 in the vertical direction are staggered, and the combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202 and third elastic bands 203 is 0.1 to 6 mm.

[0261] At this point, the elastic layer for the wearable sanitary product shown in FIG5H is prepared.

[0262] Similarly, there are multiple methods for preparing the elastic layer of wearable sanitary products with five layers of base material and four sets of rubber bands. Here we only introduce one of them. The specific method is as follows:

[0263] Five layers of base materials are prepared, including a first base material 101 , a second base material 102 , a third base material 103 , a fourth base material 104 and a fifth base material 105 .

[0264] A plurality of first elastic bands 201 are laid on the upper surface of the first base material 101 , and a distance D1 between two adjacent elastic bands in the plurality of first elastic bands 201 is 0.2 to 12 mm.

[0265] The second base material 102 is laminated on the first base material 101 .

[0266] A plurality of second rubber bands 202 are laid on the upper surface of the second base material 102 , and a distance D2 between two adjacent rubber bands in the plurality of second rubber bands 202 is 0.2 to 12 mm.

[0267] The third base material 103 is laminated on the second base material 102 .

[0268] A plurality of third rubber bands 203 are laid on the upper surface of the third base material 103 , and a distance D3 between two adjacent rubber bands in the plurality of third rubber bands 203 is 0.2 to 12 mm.

[0269] The fourth base material 104 is laminated on the third base material 103 .

[0270] A plurality of fourth elastic bands 204 are laid on the upper surface of the fourth base material 104, with a spacing D4 between adjacent pairs of the plurality of fourth elastic bands 204 ranging from 0.2 to 12 mm. The projections of the plurality of first elastic bands 201, the plurality of second elastic bands 202, the plurality of third elastic bands 203, and the plurality of fourth elastic bands 204 in the vertical direction are staggered, with a combined spacing D0 between adjacent first elastic bands 201, second elastic bands 202, third elastic bands 203, and fourth elastic bands 204 ranging from 0.1 to 6 mm.

[0271] The fifth base material 105 is laminated on the fourth base material 104 .

[0272] At this point, the elastic layer for the wearable sanitary product shown in FIG6 is prepared.

[0273] Other preparation methods for the elastic layer of wearable sanitary products with five layers of base material and four groups of elastic bands can refer to the preparation method for the elastic layer of wearable sanitary products with four layers of base material and three groups of elastic bands, which will not be described in detail here.

[0274] By analogy, embodiments comprising more layers of base materials can be prepared.

[0275] An embodiment of the present invention further provides a wearable sanitary product, which includes the elastic layer for wearable sanitary products.

[0276] 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.

[0277] 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 wearable sanitary products, characterized in that: include: N layers of base materials stacked in sequence, N being an integer greater than or equal to 3; and (N-1) sets of rubber bands, each set of rubber bands in the (N-1) sets of rubber bands comprises a plurality of rubber bands; A group of rubber bands is arranged between two adjacent layers of base material, and the spacing between two adjacent rubber bands in each group of rubber bands is 0.2 to 12 mm. The projections of the two adjacent groups of rubber bands in the up and down directions are staggered, so that the combined spacing between adjacent rubber bands is 0.1 to 6 mm.

2. The elastic layer for wearable sanitary products according to claim 1, characterized in that: include: A first base material, a second base material and a third base material stacked in sequence; A plurality of first elastic bands, which constitute a first group of elastic bands, the plurality of first elastic bands are arranged between the first base material and the second base material, and the distance between two adjacent elastic bands in the plurality of first elastic bands is 0.2 to 12 mm; and A plurality of second rubber bands, which constitute a second group of rubber bands, the plurality of second rubber bands are arranged between the second base material and the third base material, and the distance between two adjacent rubber bands in the plurality of second rubber 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.

3. The elastic layer for wearable sanitary products according to claim 1, characterized in that: include: A first base material, a second base material, a third base material and a fourth base material stacked in sequence; A plurality of first rubber bands, which constitute a first group of rubber bands, the plurality of first rubber bands are arranged between the first base material and the second base material, and the distance between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; A plurality of second rubber bands, which constitute a second group of rubber bands, the plurality of second rubber bands are arranged between the second base material and the third base material, and the distance between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; as well as A plurality of third rubber bands, which constitute a third group of rubber bands, the plurality of third rubber bands are arranged between the third base material and the fourth base material, and the distance between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm; The projections of the plurality of first rubber bands, the plurality of second rubber bands and the plurality of third rubber bands in the up-down direction are arranged alternately, so that the combined spacing between adjacent rubber bands is 0.1 to 6 mm.

4. The elastic layer for wearable sanitary products according to claim 1, characterized in that: include: A first base material, a second base material, a third base material, a fourth base material and a fifth base material stacked in sequence; A plurality of first elastic bands, which constitute a first group of elastic bands, the plurality of first elastic bands are arranged between the first base material and the second base material, and the distance between two adjacent elastic bands in the plurality of first elastic bands is 0.2 to 12 mm; and A plurality of second rubber bands, which constitute a second group of rubber bands, the plurality of second rubber bands are arranged between the second base material and the third base material, and the distance between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; A plurality of third elastics constitute a third group of elastics, and the plurality of third elastics are arranged between the third base material and the third The spacing between the four base materials and between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm; A plurality of fourth rubber bands, which constitute a fourth group of rubber bands, the plurality of fourth rubber bands are arranged between the fourth base material and the fifth base material, and the distance between two adjacent rubber bands in the plurality of fourth rubber bands is 0.2 to 12 mm; The projections of the plurality of first rubber bands, the plurality of second rubber bands, the plurality of third rubber bands and the plurality of fourth rubber bands in the up-down direction are arranged alternately, so that the combined spacing between adjacent rubber bands is 0.1 to 6 mm.

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

6. The elastic layer for wearable sanitary products according to claim 3, characterized in that: The plurality of first rubber bands are distributed at equal intervals, the plurality of second rubber bands are distributed at equal intervals, and the plurality of third rubber bands are distributed at equal intervals.

7. The elastic layer for wearable sanitary products according to claim 4, characterized in that: The plurality of first rubber bands are distributed at equal intervals, the plurality of second rubber bands are distributed at equal intervals, the plurality of third rubber bands are distributed at equal intervals, and the plurality of fourth rubber bands are distributed at equal intervals.

8. The elastic layer for wearable sanitary products according to claim 1, characterized in that: The elastic has an average dtex of 10 dtex to 440 dtex.

9. The elastic layer for wearable sanitary products according to claim 1, characterized in that: At least one of the (N-2) layers of base material in the N layers of base material is a discontinuous base material.

10. A method for preparing an elastic layer for a wearable sanitary product, characterized in that: include: Preparing N layers of base material, where N is an integer greater than or equal to 3; A group of elastic bands is formed between any two adjacent layers of base materials, each group of elastic bands includes a plurality of elastic bands, and the distance between two adjacent elastic bands in each group of elastic bands is 0.2 to 12 mm; N layers of base material are stacked in sequence, and the projections of (N-1) groups of rubber bands in the up and down directions are arranged in a staggered manner, and the combined spacing between adjacent rubber bands is 0.1 to 6 mm.

11. The method for preparing an elastic layer for wearable sanitary products according to claim 10, characterized in that: Before forming a set of elastic bands between any two adjacent layers of base material, the method further comprises: Spray glue onto multiple elastic bands; The rubber band can be bonded to two adjacent layers of base materials by glue, and each layer of base material is bonded to the adjacent base material by the glue sprayed on the rubber band.

12. The method for preparing an elastic layer for wearable sanitary products according to claim 10, characterized in that: Before forming a set of elastic bands between any two adjacent layers of base material, the method further comprises: spraying glue on one of the surfaces of two adjacent layers of base materials that are in contact with each other; The rubber band can be bonded to two adjacent layers of base materials by glue, and the two adjacent layers of base materials are bonded by glue.

13. The method for preparing an elastic layer for wearable sanitary products according to claim 10, characterized in that: include: preparing a three-layer base material, wherein the three-layer base material comprises a first base material, a second base material and a third base material; Laying a plurality of first rubber bands on the upper surface of the first base material, wherein the distance between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; A plurality of second rubber bands are laid on the lower surface of the third base material, wherein the distance between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; Laying a second base material on the side of the first base material on which the first elastic band is laid; The side of the third base material with the second elastic band laid thereon is stacked on the second base material, and the projections of the first elastic bands and the second elastic bands in the vertical direction are staggered, and the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm.

14. The method for preparing an elastic layer for wearable sanitary products according to claim 10, characterized in that: include: preparing a three-layer base material, wherein the three-layer base material comprises a first base material, a second base material and a third base material; A plurality of first rubber bands are laid on the lower surface of the second base material, and a plurality of second rubber bands are laid on the upper surface of the second base material, wherein the spacing between two adjacent rubber bands among the plurality of first rubber bands is 0.2 to 12 mm, and the spacing between two adjacent rubber bands among the plurality of second rubber bands is 0.2 to 12 mm, and the projections of the plurality of first rubber bands and the plurality of second rubber bands in the upper and lower directions are staggered, and the combined spacing between adjacent first rubber bands and second rubber bands is 0.1 to 6 mm; laminating a second base material on the first base material; A third base material is laminated on the second base material.

15. The method for preparing an elastic layer for wearable sanitary products according to claim 10, characterized in that: include: preparing a three-layer base material, wherein the three-layer base material comprises a first base material, a second base material and a third base material; Laying a plurality of first rubber bands on the upper surface of the first base material, wherein the distance between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; laminating a second base material on the first base material; Laying a plurality of second elastic bands on the upper surface of the second base material, wherein the spacing between two adjacent elastic bands among 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 staggered, and the combined spacing between adjacent first elastic bands and second elastic bands is 0.1 to 6 mm; A third base material is laminated on the second base material.

16. The method for preparing an elastic layer for wearable sanitary products according to claim 10, characterized in that: include: preparing four layers of base materials, the four layers of base materials comprising a first base material, a second base material, a third base material and a fourth base material; Laying a plurality of first rubber bands on the upper surface of the first base material, wherein the distance between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; A plurality of second rubber bands are laid on the lower surface of the third base material, and a plurality of third rubber bands are laid on the upper surface of the third base material, wherein the spacing between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm, and the spacing between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm; laminating a second base material on the first base material; Laying the side of the third base material with the second elastic band on the second base material; The fourth base material is stacked on the third base material, and the projections of the first elastic bands, the second elastic bands and the third elastic bands in the vertical direction are staggered, and the combined spacing of the adjacent first elastic bands, the second elastic bands and the third elastic bands is 0.1 to 6 mm.

17. The method for preparing an elastic layer for a wearable sanitary product according to claim 10, characterized in that: include: preparing four layers of base materials, the four layers of base materials comprising a first base material, a second base material, a third base material and a fourth base material; A plurality of first rubber bands are laid on the lower surface of the second base material, a plurality of second rubber bands are laid on the upper surface of the second base material, a plurality of third rubber bands are laid on the lower surface of the third base material, and a plurality of fourth rubber bands are laid on the upper surface of the fourth base material, the spacing between two adjacent rubber bands among the plurality of first rubber bands is 0.2 to 12 mm, the spacing between two adjacent rubber bands among the plurality of second rubber bands is 0.2 to 12 mm, and the spacing between two adjacent rubber bands among the plurality of third rubber bands is 0.2 to 12 mm, the projections of the plurality of first rubber bands, the plurality of second rubber bands and the plurality of third rubber bands in the up and down direction are staggered, and the combined spacing between adjacent first rubber bands, second rubber bands and third rubber bands is 0.1 to 6 mm; laminating a second base material on the first base material; laminating a third base material on the second base material; A fourth base material is laminated on the third base material.

18. The method for preparing an elastic layer for wearable sanitary products according to claim 10, characterized in that: include: preparing four layers of base materials, the four layers of base materials comprising a first base material, a second base material, a third base material and a fourth base material; Laying a plurality of first rubber bands on the upper surface of the first base material, wherein the distance between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; laminating a second base material on the first base material; Laying a plurality of second rubber bands on the upper surface of the second base material, wherein the distance between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; laminating a third base material on the second base material; A plurality of third rubber bands are laid on the upper surface of the third base material, wherein the spacing between two adjacent rubber bands among the plurality of third rubber bands is 0.2 to 12 mm, the projections of the plurality of first rubber bands, the plurality of second rubber bands and the plurality of third rubber bands in the vertical direction are staggered, and the combined spacing between adjacent first rubber bands, second rubber bands and third rubber bands is 0.1 to 6 mm; A fourth base material is laminated on the third base material.

19. The method for preparing an elastic layer for a wearable sanitary product according to claim 10, characterized in that: include: preparing five layers of base materials, the five layers of base materials comprising a first base material, a second base material, a third base material, a fourth base material and a fifth base material; Laying a plurality of first rubber bands on the upper surface of the first base material, wherein the distance between two adjacent rubber bands in the plurality of first rubber bands is 0.2 to 12 mm; laminating a second base material on the first base material; Laying a plurality of second rubber bands on the upper surface of the second base material, wherein the distance between two adjacent rubber bands in the plurality of second rubber bands is 0.2 to 12 mm; laminating a third base material on the second base material; A plurality of third rubber bands are laid on the upper surface of the third base material, wherein the distance between two adjacent rubber bands in the plurality of third rubber bands is 0.2 to 12 mm; laminating a fourth base material on the third base material; A plurality of fourth rubber bands are laid on the upper surface of the fourth base material, wherein the spacing between two adjacent rubber bands among the plurality of fourth rubber bands is 0.2 to 12 mm, and the projections of the plurality of first rubber bands, the plurality of second rubber bands, the plurality of third rubber bands and the plurality of fourth rubber bands in the vertical direction are staggered, and the combined spacing between adjacent first rubber bands, second rubber bands, third rubber bands and fourth rubber bands is 0.1 to 6 mm; The fifth base material is laminated on the fourth base material.

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