Anti-strangulation breathable waist elastic material and preparation method thereof, and comfortable sanitary products

Abstract

The present invention discloses an anti-strangulation breathable waist elastic material and a preparation method thereof, as well as an anti-strangulation and leak-proof comfortable sanitary product. The anti-strangulation breathable waist elastic material comprises a first elastic non-woven fabric and a second elastic non-woven fabric composited up and down, the first elastic non-woven fabric comprises a cross-laid bicomponent curly fiber, the bicomponent curly fiber comprises a first fiber and a second fiber arranged in parallel, the first fiber and the second fiber are bonded in parallel to form a curly fiber; the second elastic non-woven fabric comprises at least one fiber layer, the fiber layer is formed by disorderly superposition of elastic fiber filaments. The elastic material provided by the present invention can be used to prepare an elastic waist of sanitary products, for example, for preparing an elastic waist of pull-up pants, which can well solve the problem of the waist and legs being strangled or the pants falling off due to inappropriate elasticity during use of pull-up pants, and can also solve the problem of poor air permeability and poor comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary products, and in particular to an anti-strangulation and breathable waist elastic material and a preparation method thereof, as well as an anti-strangulation and leak-proof comfortable sanitary product. Background Art

[0002] As the disposable diapers that are most similar to underwear, baby pull-up pants can be roughly divided into the following parts: pull-up pants body, absorbent core, leak-proof membrane, fixed waist circumference, leak-proof leg circumference, and disposable patch. Baby pull-up pants can be divided into the following three configurations according to their structure: one-piece pull-up pants, two-piece pull-up pants, and three-piece pull-up pants. Among them, the one-piece pull-up pants have greater process difficulty, better experience, and more material savings; the two-piece pull-up pants have relatively less process difficulty, better experience, and use more materials; the three-piece pull-up pants have the simplest process, poorer experience, and the most economical materials. The pull-up pants of the above three structures have different focuses and each has its own advantages and disadvantages. Among the pull-up pants on the market, the one-piece structure accounts for the lowest proportion, followed by the two-piece pull-up pants, and the three-piece pull-up pants account for the largest proportion. The pull-up pants of the above three structures can be made by online compounding of multiple materials, and then cut and sewn as one.

[0003] However, regardless of the structure of the pull-up pants, most of the pull-up pants for babies on the market use spandex yarn as the elastic waist to achieve the product's close fit and wrapping. The spandex yarn must have a certain thickness and arrangement density to achieve the above purpose. However, during the product molding process, the elasticity of the spandex yarn is often unevenly distributed, and the body shape of the users is different. Therefore, during the use of the pull-up pants on the market, it is easy to cause marks on the waist and legs of obese babies, and the experience is very bad. When wearing pull-up pants, users with thinner bodies often find that the pull-up pants are easy to fall off because of their heavy weight after absorbing urine.

[0004] Patent CN209951581U discloses a pair of pull-up pants, which includes a front elastic waist and a rear elastic waist, and the front elastic waist and the rear elastic waist both include an inner elastic material sheet composed of non-woven fabric, an outer elastic material sheet composed of non-woven fabric, and elastic bands, and the elastic bands are wrapped by the inner elastic material sheet and the outer elastic material sheet, and the comfort of the pull-up pants can be improved by such an arrangement. However, this patent does not conduct an in-depth study on the inner elastic material sheet and the outer elastic material sheet, and does not realize that the specific selection of the inner elastic material sheet and the outer elastic material sheet will have an important impact on the comfort, wrapping, breathability, etc. of the pull-up pants.

[0005] Patent CN210170301U discloses a pair of pull-up pants with an elastic waist, wherein the elastic waist includes a front elastic waist and a back elastic waist, wherein the front elastic waist and the back elastic waist are composed of an upper non-woven fabric, an elastic elastic band, and a lower non-woven fabric, wherein the elastic elastic band is compounded between the upper non-woven fabric and the lower non-woven fabric, and such a configuration can improve the fit of the elastic waist and improve wearing comfort. However, this patent does not conduct an in-depth study on the upper non-woven fabric and the lower non-woven fabric, and does not realize that the specific selection of the upper non-woven fabric and the lower non-woven fabric will have an important impact on the comfort, wrapping, breathability, etc. of the pull-up pants. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide an anti-strangulation breathable waist elastic material.

[0007] The second object of the present invention is to provide a method for preparing an anti-strangulation breathable waist elastic material.

[0008] The third object of the present invention is to provide a comfortable sanitary product that is anti-strangulation and anti-leakage.

[0009] One of the purposes of the present invention is achieved by the following technical solution:

[0010] The invention discloses an anti-strangulation and breathable waist elastic material, comprising a first elastic non-woven fabric and a second elastic non-woven fabric composited from top to bottom, wherein the first elastic non-woven fabric comprises cross-laid bicomponent curly fibers, wherein the bicomponent curly fibers comprise first fibers and second fibers arranged in parallel, and the first fibers and the second fibers are bonded in parallel to form curly fibers; and the second elastic non-woven fabric comprises at least a fiber layer formed by disorderly stacking elastic fibers.

[0011] Furthermore, it also includes a plurality of elastic strips; the plurality of elastic strips are sequentially arranged between the first elastic non-woven fabric and the second elastic non-woven fabric.

[0012] Furthermore, the denier of the plurality of elastic strips is 250-300 denier; and the distance between two adjacent elastic strips is 1-2 mm.

[0013] Furthermore, some of the elastic strips are in a stretched state; preferably, the stretching ratio of some of the elastic strips is 2.0-4 times; more preferably, the stretching ratio of some of the elastic strips is 2.2-3.5 times, or 2.5-3.5 times, or 2.2-2.8 times.

[0014] Furthermore, a plurality of the elastic strips are arranged transversely in sequence and fixed between the first elastic non-woven fabric and the second elastic non-woven fabric by ultrasonic wave, and a plurality of ultrasonic bonding sites are formed on each of the elastic strips.

[0015] Furthermore, the ultrasonic bonding sites on each of the two adjacent elastic strips are vertically opposite to each other in sequence to form a plurality of vertically arranged ultrasonic bonding lines; or, the ultrasonic bonding sites on each of the two adjacent elastic strips are gradually inclined relative to each other in sequence to form a plurality of inclined ultrasonic bonding lines.

[0016] Furthermore, every two adjacent ultrasonic bonding lines form a group of bonding lines, the distance between two elastic bands in each group of bonding lines is d, the distance between two adjacent groups of bonding lines is D, and D is greater than d.

[0017] Furthermore, when a plurality of elastic strips are arranged between the first elastic non-woven fabric and the second elastic non-woven fabric, the gram weight of the first elastic non-woven fabric is 13-17 g / ㎡; and the gram weight of the second elastic non-woven fabric is 15-25 g / ㎡.

[0018] Furthermore, when the elastic material only includes the first elastic non-woven fabric and the second elastic non-woven fabric without the need to sandwich a plurality of elastic strips, the gram weight of the first elastic non-woven fabric is 18-22 g / ㎡; the gram weight of the second elastic non-woven fabric is 80-100 g / ㎡.

[0019] Furthermore, the first fiber is polypropylene fiber, the second fiber is polyethylene fiber; and the second elastic non-woven fabric is polyurethane elastic non-woven fabric.

[0020] Furthermore, the curling shrinkage rate of the curled fibers is 50-60%; and the stretching ratio of the second elastic non-woven fabric is 3-4 times.

[0021] The second object of the present invention is achieved by adopting the following technical solution:

[0022] The preparation method of the anti-strangulation breathable waist elastic material comprises the following steps:

[0023] The first elastic nonwoven fabric preparation step: extruding the molten first fiber and the second fiber side by side to form a single fiber filament, the single fiber filament is cooled to form a curly fiber, taking the curly fiber and cross-laying it and fixing it by thermal bonding to obtain the first elastic nonwoven fabric; wherein the first fiber and the second fiber have different heat shrinkage strengths;

[0024] The second elastic non-woven fabric preparation step: spraying a high-temperature molten polymer raw material through a spinneret to form elastic filaments, the elastic filaments overlap each other in a disordered manner, and after cooling, they adhere to each other to obtain the second elastic non-woven fabric;

[0025] Compounding step: Compounding the first elastic nonwoven fabric and the second elastic nonwoven fabric to obtain.

[0026] Furthermore, in the compounding step, a plurality of elastic strips are taken, and the plurality of elastic strips are arranged in sequence and ultrasonically bonded on the first elastic non-woven fabric to form a semi-finished product, and then the second elastic non-woven fabric is ultrasonically compounded with the semi-finished product, so that the plurality of elastic strips are sandwiched between the first elastic non-woven fabric and the second elastic non-woven fabric.

[0027] Furthermore, the plurality of elastic strips are in a stretched state during the compounding process with the first elastic non-woven fabric; preferably, the stretching ratio of the plurality of elastic strips is 2.0-4 times; more preferably, the stretching ratio of the plurality of elastic strips is 2.2-3.5 times, or 2.5-3.5 times, or 2.2-2.8 times.

[0028] Furthermore, the first fiber is polypropylene fiber, the second fiber is polyethylene fiber; the polymer raw material is polyurethane, and the second elastic non-woven fabric is polyurethane elastic non-woven fabric.

[0029] The third object of the present invention is achieved by adopting the following technical solution:

[0030] The anti-strangulation and anti-leakage comfortable sanitary product adopts the anti-strangulation and breathable waist elastic material.

[0031] Furthermore, it includes a base trouser body and an inner body arranged on the base trouser body; the base trouser body includes a front waistline and a back waistline, the front waistline is the front waistline formed by the anti-strangulation breathable waistline elastic material; the back waistline is the back waistline formed by the anti-strangulation breathable waistline elastic material.

[0032] Furthermore, the anti-strangulation breathable waist elastic material includes a first elastic non-woven fabric and a second elastic non-woven fabric compounded by ultrasonic wave, the first elastic non-woven fabric includes cross-laid two-component curly fibers, the two-component curly fibers include polypropylene fibers and polyethylene fibers arranged in parallel, the polypropylene fibers and the polyethylene fibers are bonded in parallel to form curly fibers with a curling shrinkage rate of 50-60%; the first elastic non-woven fabric has a gram weight of 18-22g / ㎡; the second elastic non-woven fabric includes at least one polyurethane fiber layer, the polyurethane fiber layer is formed by disorderly stacking polyurethane elastic fibers, and the gram weight of the second elastic non-woven fabric is 80-100g / ㎡.

[0033] Furthermore, the anti-strangulation breathable waist elastic material includes a first elastic non-woven fabric and a second elastic non-woven fabric compounded by ultrasonic wave, and a plurality of elastic strips arranged in sequence between the first elastic non-woven fabric and the second elastic non-woven fabric; the first elastic non-woven fabric includes cross-laid bicomponent curly fibers, the bicomponent curly fibers include polypropylene fibers and polyethylene fibers arranged in parallel, and the polypropylene fibers and the polyethylene fibers are bonded in parallel to form curly fibers with a curling shrinkage rate of 50-60%; the first elastic non-woven fabric has a gram weight of 13-17g / ㎡; the second elastic non-woven fabric includes at least one polyurethane fiber layer, the polyurethane fiber layer is formed by disorderly stacking polyurethane elastic fibers, the gram weight of the second elastic non-woven fabric is 15-25g / ㎡, and the stretching ratio is 3-4 times; several of the elastic strips are elastic strips in a stretched state, the deniers of several of the elastic strips are 250-300 deniers, and the distance between two adjacent elastic strips is 1-2mm.

[0034] Furthermore, the stretching ratio of the rear waistline is greater than or equal to the stretching ratio of the front waistline.

[0035] Furthermore, the inner body includes an absorbent core, an anti-leakage edge and a leak-proof membrane; at least one first elastic body extending longitudinally is built into the left and right sides of the absorbent core; the anti-leakage edge is provided on the left and right sides of the absorbent core, the upper part of the anti-leakage edge is folded inward to form a free end, and at least one second elastic body extending longitudinally is provided in the free end; the leak-proof membrane is provided at the bottom of the absorbent core, and the left and right sides of the leak-proof membrane are respectively extended upward, so that the leak-proof membrane forms a U-shaped structure that wraps the left and right sides of the absorbent core.

[0036] Furthermore, the lower part of the anti-side leakage partition is folded inwardly to form a fixed end, and the left and right sides of the anti-leakage membrane respectively extend outwardly through the fixed end of the anti-side leakage partition and are embedded in the anti-side leakage partition.

[0037] Furthermore, the anti-leakage membrane extends into the free end of the anti-side leakage partition.

[0038] Furthermore, the absorbent core includes an absorbent inner core, an inner core wrapping cloth and a surface layer, and at least one longitudinally extending first elastomer is respectively provided on the left and right sides of the absorbent inner core; the inner core wrapping cloth encloses the absorbent inner core and the first elastomer to form a core body; the surface layer at least covers the top surface of the core body.

[0039] Furthermore, it also includes a covering layer, which covers the top surface of the core body and folds downward to cover at least a portion of the bottom surface of the core body; the surface layer is arranged on the top surface of the covering layer.

[0040] Furthermore, the number of the second elastic bodies is 2, 3, 4 or 5.

[0041] Furthermore, the bottom trouser body also includes an outer non-woven fabric, an inner non-woven fabric and a waist non-woven fabric; the front waist is sandwiched between the outer non-woven fabric and the inner non-woven fabric at the front waist end; the back waist is sandwiched between the outer non-woven fabric and the inner non-woven fabric at the back waist end; the waist non-woven fabric is arranged above the inner non-woven fabric, and the waist non-woven fabric at least covers the front waist end and the back waist end of the inner non-woven fabric.

[0042] Furthermore, the waist non-woven fabric is made of medical gauze.

[0043] Furthermore, it also includes a number of leg elastics; the number of leg elastics are divided into two groups, namely front waist leg elastics and back waist leg elastics; one end of the front waist leg elastic is fixed between the inner layer of non-woven fabric and the front waist circumference, and the other end is fixed between the inner layer of non-woven fabric and the outer layer of non-woven fabric; one end of the back waist leg elastic is fixed between the inner layer of non-woven fabric and the back waist circumference, and the other end is fixed between the inner layer of non-woven fabric and the outer layer of non-woven fabric.

[0044] Furthermore, for the front waist side leg elastic body, one end fixed between the inner layer of non-woven fabric and the front waistline is recorded as the front waist end of the elastic body, and the other end fixed between the inner layer of non-woven fabric and the outer layer of non-woven fabric is recorded as the front crotch end of the elastic body; the front waist end of the elastic body is bent and extended toward the front crotch end of the elastic body to form two arcs with different bending directions.

[0045] Furthermore, for the back waist side leg elastic body, one end fixed between the inner layer of non-woven fabric and the back waistline is recorded as the back waist end of the elastic body, and the other end fixed between the inner layer of non-woven fabric and the outer layer of non-woven fabric is recorded as the back crotch end of the elastic body; the back waist end of the elastic body is bent and extended toward the back crotch end of the elastic body to form two arcs with different bending directions.

[0046] Furthermore, it also includes a disposable patch, which is arranged on the outer non-woven fabric.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] The anti-strangulation breathable waist elastic material provided by the present invention is a structure with elastic stretchability. The first elastic non-woven fabric and the second elastic non-woven fabric can form a material with better elasticity after being compounded. Among them, the first elastic non-woven fabric is made of two-component curled fibers, which are formed by countless curled fibers being cross-laid and fixed by thermal bonding points. The cloth surface is fluffy, the elongation is more than 40% higher than that of ordinary non-woven fabrics, the deformation is large, and it has a certain retraction ability. After the first elastic non-woven fabric is compounded with the second elastic non-woven fabric, it can give the elastic material stronger support, limit the excessive stretching of the second elastic non-woven fabric, and prevent the elastic material from being damaged. The second elastic non-woven fabric is made of elastic fibers that overlap randomly and are bonded together after cooling to form a high-elastic non-woven fabric. There are many gaps between the elastic fibers in the second elastic non-woven fabric, and the air permeability is very good.

[0049] The elastic material provided by the present invention can be used to prepare elastic waistbands for sanitary products, for example, for preparing elastic waistbands for pull-up pants, which can effectively solve the problem of the waist and legs being squeezed or the pants falling off due to inappropriate tightness during use of pull-up pants, and can also solve the problems of poor air permeability and poor comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 An expanded view of the sanitary product provided by an embodiment of the present invention;

[0051] Figure 2 A cross-sectional view of a sanitary product provided by an embodiment of the present invention;

[0052] Figure 3 A schematic diagram of the distribution of several elastic bands on the elastic material provided by an embodiment of the present invention;

[0053] Figure 4 A cross-sectional view of an elastic material provided by an embodiment of the present invention;

[0054] Figure 5 A schematic diagram of the elastic strip and the ultrasonic bonding pattern in the elastic material provided by an embodiment of the present invention;

[0055] Figure 6 A three-dimensional diagram of a sanitary product provided by an embodiment of the present invention;

[0056] Figure 7 It is a cross-sectional view of a sanitary product in the prior art;

[0057] Figure 8 A partial enlarged view of the first elastic nonwoven fabric provided in an embodiment of the present invention;

[0058] Fig. 9 This is a partial enlarged view of the second elastic non-woven fabric provided in an embodiment of the present invention.

[0059] In the figure: 1. Outer non-woven fabric; 2. Elastic material; 3. Inner non-woven fabric; 4. Waistline non-woven fabric; 5. Anti-side leakage edge; 6. Inner core wrapping cloth; 7. Anti-leakage membrane; 8. Disposable patch; 9. Leg elastic body; 10. Second elastic body; 11. Surface layer; 12. Absorbent inner core; 13. Covering layer; 14. First elastic body; 15. Absorbent core; 16. Joints on both sides of the waistline; 17. First elastic non-woven fabric; 18. Elastic band; 19. Second elastic non-woven fabric; 20. Adhesive lines. DETAILED DESCRIPTION

[0060] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0062] For the embodiments of the present invention, "longitudinal direction" and "length direction" both refer to the direction from the front waist end to the back waist end of the product, while "transverse direction" and "width direction" are directions orthogonal to the "longitudinal direction".

[0063] Example 1

[0064] like Figure 1-5 As shown in 8-9, the anti-strangulation breathable waist elastic material 2, the elastic material 2 includes a first elastic non-woven fabric 17 and a second elastic non-woven fabric 19 composited from top to bottom, the first elastic non-woven fabric 17 is formed by cross-lapping curly fibers, for example, the first elastic non-woven fabric 17 includes the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 composited from top to bottom, the first elastic non-woven fabric 17 includes cross-lapped bi-component curly fibers, the bi-component curly fibers include first fibers and second fibers arranged in parallel, the first fibers and the second fibers are bonded in parallel to form curly fibers; the second elastic non-woven fabric 19 includes at least one fiber layer, the fiber layer is formed by disorderly stacking elastic fibers.

[0065] The anti-strangulation breathable waist elastic material 2 provided in the embodiment of the present invention is a structure with elastic stretchability. The first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 can form a material with better elasticity after being compounded. Among them, the first elastic non-woven fabric 17 uses super-curled non-woven fabric, which is formed by countless super-curled fibers cross-laid and fixed by thermal bonding points. The fabric surface is fluffy, the elongation is more than 40% higher than that of ordinary non-woven fabrics, the deformation is large, and it has a certain retraction ability. The curled fibers in the first elastic non-woven fabric 17 can be naturally curled fibers. After the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 are compounded, they can give the elastic material 2 stronger support, limit the excessive stretching of the second elastic non-woven fabric 19, and prevent the elastic material 2 from being damaged.

[0066] The second elastic non-woven fabric 19 is formed by melting the polymer raw material and spraying it through a spinneret to form extremely fine elastic filaments. The elastic filaments overlap each other in a disordered manner and adhere to each other after cooling to form a highly elastic non-woven fabric. There are many gaps between the elastic fiber filaments in the second elastic non-woven fabric 19, and the air permeability is very good. In addition, the second elastic non-woven fabric 19 is formed by the disordered superposition of elastic fiber filaments, so that the gram weight of the second elastic non-woven fabric 19 can be made low enough, with a minimum of about 10gsm. Compared with the elastic film prepared by the casting method, its gram weight is greatly reduced, and the minimum gram weight of the cast elastic film is about 25gsm. In other words, the second elastic non-woven fabric 19 formed by the disordered superposition of elastic fiber filaments has a similar shrinkage force to the elastic film formed by the casting method, but the cost of the second elastic non-woven fabric 19 can be reduced by about 60%.

[0067] The second elastic nonwoven fabric 19 may include only one fiber layer, and the elastic fiber filaments are bonded in a disordered stacking manner to form a single fiber layer. This structure allows the second elastic nonwoven fabric 19 to maintain good fluffiness and air permeability. If the second elastic nonwoven fabric 19 includes two or more fiber layers, then the multiple fiber layers can be compounded. For example, when the fiber filaments are sprayed out, they are randomly superimposed to first form a single fiber layer, and then the fiber filaments that continue to be sprayed out are randomly superimposed on the single fiber layer again to form a second fiber layer; or a plurality of single fiber layers can be compounded by adhesive bonding, ultrasonic bonding, etc. The elastic fiber filaments in the second elastic nonwoven fabric 19 are randomly superimposed, which means that the elastic fiber filaments are not regularly arranged, and are not arranged according to the preset radial and weft directions. The fiber filaments are not completely parallel, vertically arranged, or regularly interwoven. They are formed by the polymer raw materials in a molten state being sprayed out through a spinneret and naturally randomly superimposed.

[0068] As a preferred embodiment, the first elastic nonwoven fabric 17 and the second elastic nonwoven fabric 19 are treated in a stretched state during the compounding process, and after compounding, a wrinkled elastic material 2 is formed, which can maintain good elasticity and high comfort.

[0069] like Figure 3-5 As shown, as a preferred embodiment, it also includes a plurality of elastic strips 18; the plurality of elastic strips 18 are arranged in sequence between the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19. That is, the elastic material 2 forms a three-layer sandwich structure, the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 are located on both sides, and the plurality of elastic strips 18 are located in the middle. The second elastic non-woven fabric 19 has a risk of fiber breakage and partial loss of elasticity when the elastic material 2 is used as a waist circumference because the adhesion between the elastic fiber filaments is relatively small, and the fiber filaments themselves are not particularly resistant to breaking. The plurality of elastic strips 18 between the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 can just solve this problem. In addition, the plurality of elastic strips 18 between the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 can also make up for the shortcomings of the first elastic non-woven fabric 17, which has a small deformation amount, insufficient elastic force, and poor fit and wrapping. In addition, when sanitary products adopt the elastic material 2 of this structure as an elastic waistline, the elastic strip 18 is prefabricated and composited with the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19. When the sanitary products are formed, there is no need to pull dozens of elastic bands on the machine, which can greatly enhance the stability of the machine and reduce defective pieces, thereby bringing about a significant increase in production capacity.

[0070] As a preferred embodiment, a plurality of elastic strips 18 are continuous and uninterrupted, and the elastic strips 18 may not be divided into regions on the elastic material 2, that is, the layout density of the elastic strips 18 in each region may be set the same. The denier of the plurality of elastic strips 18 is 250-300 deniers, more preferably 280 deniers, while the diameter of the elastic strips 18 on the traditional sanitary products is generally 620D, and the diameter of the elastic strips 18 in the embodiment of the present invention is only 40%-50% of the diameter of the traditional elastic strips. In addition, the spacing between two adjacent elastic strips 18 in the embodiment of the present invention is 1-2mm. The plurality of elastic strips 18 are elastic strips 18 in a stretched state, that is, when preparing the elastic material 2, the plurality of elastic strips 18 are in a stretched state. Preferably, the stretching ratio of the plurality of elastic strips 18 is 2.0-4 times, more preferably the stretching ratio of the plurality of elastic strips 18 is 2.2-3.5 times, and further 3.0-3.5 times, to provide a stretching force of 7-8N / 25mm. The elastic strip 18 is arranged in the above manner, which can greatly improve the wearing comfort. The user can hardly feel the existence of the elastic strip 18 in the elastic area of ​​the trouser body during wearing, and there will be no obvious stress position. The elasticity is very uniform and will not cause local marks.

[0071] Furthermore, the elastic material 2 can be used to prepare the front waistline or the rear waistline, respectively. In order to further improve the comfort of the product, when the elastic material 2 is used to prepare the front waistline, the stretching ratio of the elastic strip 18 can be set relatively small; when the elastic material 2 is used to prepare the rear waistline, the stretching ratio of the elastic strip 18 can be set relatively large. That is, the stretching ratios of several elastic strips 18 can be flexibly adjusted, and different stretching forces can be set according to the unique body shape of infants and young children. For example, the difference in abdominal circumference before and after eating is relatively large, and the stretching ratio of the elastic strip 18 can be set to a relatively low level such as 2.2-2.8 times, more preferably 2.6-2.8 times, so as to ensure that the abdomen is not tightened very tightly, affecting the comfort. The stretching ratio of the elastic material 2 and the elastic band 18 used for the rear waistline can be set relatively high, such as 3.2-3.5 times, more preferably 2.5-3.5 times, and further 2.5-3 times, so that the diaper can fit the body better and prevent rear leakage when urine is discharged.

[0072] In the embodiment of the present invention, the stretch ratio of the elastic material 2 of the front waist is set to be smaller, while the stretch ratio of the elastic material 2 of the back waist is set to be larger. This design can make the back waist fit the back waist better, while the front waist maintains a suitable degree of elasticity. When the lung respiratory function of infants and young children is not fully developed, it is particularly important for the abdomen to drive the cardiopulmonary function. Lowering the stretch ratio of the front waist can reduce the elasticity of the front waist, thereby making the infants and young children in a comfortable state after breathing or eating.

[0073] As a preferred embodiment, the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 are compounded by ultrasound, without the need for hot melt adhesive, and are soft and comfortable. More specifically, a plurality of elastic strips 18 are arranged transversely in sequence and fixed between the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 by ultrasound, and a plurality of ultrasonic bonding sites are formed on each elastic strip 18. The elastic material 2 of the embodiment of the present invention is bonded by an ultrasonic process, and the amount of hot melt adhesive used is 0g, which greatly improves the softness of the elastic material 2. At the same time, it can avoid the problem of uneven glue amount in the process of gluing the elastic strip 18, which easily causes the elastic strip 18 to shrink and cause serious elasticity loss, and can also avoid the problem of hard trousers and poor softness caused by increasing the amount of glue to ensure that the elastic does not shrink. In addition, because there is no gluing process in the product manufacturing process, there is no need to heat the melting cylinder of the hot melt adhesive, which can greatly improve the production line speed (the whole machine upgrade can speed up by 30%-100%, depending on the degree of automation of the machine). In addition, the absence of hot melt adhesive can reduce the odor of the product. Therefore, ultrasonic lamination can save energy, be environmentally friendly (a single piece of sanitary product uses 0.5g less hot melt adhesive, and based on an annual output of 1 billion pieces, 500 tons of hot melt adhesive can be saved), and greatly save costs. The first elastic nonwoven fabric 17, the second elastic nonwoven fabric 19 and the plurality of elastic strips 18 can greatly release the softness of the material through ultrasonic lamination, forming a material with excellent elasticity and extremely soft feel.

[0074] like Figure 5 As shown, as a preferred embodiment, the ultrasonic bonding sites on two adjacent elastic strips 18 are sequentially opposite to each other up and down to form a plurality of vertically arranged ultrasonic bonding lines 20, that is, the ultrasonic bonding lines 20 are vertically orthogonal to the plurality of elastic strips 18. Alternatively, the ultrasonic bonding sites on two adjacent elastic strips 18 are gradually inclined to each other in sequence to form a plurality of inclined ultrasonic bonding lines 20, that is, the ultrasonic lines are non-orthogonal to the plurality of elastic strips 18. The bonding lines 20 are linear, which is convenient for production.

[0075] As a preferred embodiment, every two adjacent ultrasonic bonding lines 20 form a group of bonding lines 20, the distance between the two elastic bands 18 in each group of bonding lines 20 is d, and the distance between two adjacent groups of bonding lines 20 is D, and D is greater than d. That is, the bonding lines 20 are designed with ultrasonic double stripes, and each bonding line 20 can be bonded to materials separately, avoiding the problem of weak bonding of single stripes.

[0076] When a plurality of elastic strips 18 are provided in the elastic material 2 of the embodiment of the present invention, the material that mainly plays an elastic role in the elastic material 2 is the plurality of elastic strips 18 in the middle, and the first elastic non-woven fabric 17 plays a major supporting role, limiting the excessive stretching of the second elastic non-woven fabric 19 and the elastic strips 18, and the gram weight of the first elastic non-woven fabric 17 is preferably 13-17 g / ㎡. The second elastic non-woven fabric 19 mainly plays a role in maintaining the fluffiness of the material, and a secondary role in providing partial elasticity, and the gram weight of the second elastic non-woven fabric 19 is preferably 15-25 g / ㎡.

[0077] As another embodiment, the elastic material 2 may only include the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19, without the need for the elastic band 18. At this time, in order to prevent the sanitary products from being worn for too long or the elastic fiber yarn from breaking, which leads to a decrease in the elasticity of the waist, we can compensate for the loss of elasticity by increasing the gram weight of the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19 to ensure that the sanitary products (such as pull-up pants) do not fall off during use. For example, the gram weight of the first elastic non-woven fabric 17 can be set to 18-22g / ㎡, more preferably 20g / ㎡, and the gram weight of the second elastic non-woven fabric 19 can be set to 80-100g / ㎡.

[0078] As a preferred embodiment, the first fiber is polypropylene fiber and the second fiber is polyethylene fiber. When the first non-woven fabric is formed, the PP material and the PE material are extruded side by side to form a single fiber filament. The thermoplasticity and resilience of the two materials are different. When the two materials are cooled to room temperature, the shrinkage of the PE material will be greater, resulting in the single fiber filament being obviously curled.

[0079] As a preferred embodiment, the second elastic non-woven fabric 19 is a polyurethane elastic non-woven fabric. When the second elastic non-woven fabric 19 is formed, polyurethane is sprayed out through a spinneret to form extremely fine elastic filaments. The elastic filaments overlap each other in a disordered manner and adhere to each other after cooling to form a highly elastic non-woven fabric with an elasticity ratio of up to 4 times.

[0080] As a preferred embodiment, the curling shrinkage rate of the curled fibers in the first elastic nonwoven fabric 17 is 50-60%. The curling shrinkage rate refers to the ratio of the difference between the straightened length and the length when the deformed yarn is straightened and then restored to the curled state under a specified load after curling to the length after straightening. The curling shrinkage rate of polyester yarn is approximately between 5% and 25%, and the high shrinkage is approximately between 35% and 50%. The curling shrinkage rate of the curled fibers in the first elastic nonwoven fabric 17 of the embodiment of the present invention is 50-60%, so that the stretching ratio of the first elastic nonwoven fabric 17 can reach 2 times or more, and the stretching ratio of the second elastic nonwoven fabric 19 is 3-4 times. This arrangement makes the elastic material 2 have good elasticity and good wearing comfort.

[0081] The elastic material 2 provided in Example 1 of the present invention is suitable for sanitary products. As a waist elastic material 2, it can completely replace the elastic bands on the waist and abdomen of traditional products. The elastic material 2 can greatly improve the wearing comfort, has a good fit with the user, will not produce marks, and will not cause sanitary products such as walking pants to slip during use.

[0082] Example 2

[0083] The preparation method of the anti-strangulation breathable waist elastic material 2 comprises the following steps:

[0084] Preparation steps of the first elastic nonwoven fabric 17: extruding the molten first fiber and the second fiber side by side to form a single fiber filament, cooling the single fiber filament to form a curled fiber, taking the curled fiber and cross-laying it and fixing it by thermal bonding to obtain the first elastic nonwoven fabric 17; wherein the first fiber and the second fiber have different heat shrinkage strengths;

[0085] The second elastic nonwoven fabric 19 is prepared by spraying a high-temperature molten polymer raw material through a spinneret to form elastic filaments, which are randomly overlapped and adhered to each other after cooling to prepare the second elastic nonwoven fabric 19;

[0086] Compounding step: Compounding the first elastic nonwoven fabric 17 and the second elastic nonwoven fabric 19 to obtain.

[0087] As a preferred embodiment, in the compounding step, a plurality of elastic strips 18 are taken, and the plurality of elastic strips 18 are sequentially arranged and bonded on the first elastic non-woven fabric 17 by ultrasonic wave to form a semi-finished product, and then the second elastic non-woven fabric 19 is compounded with the semi-finished product by ultrasonic wave, so that the plurality of elastic strips 18 are sandwiched between the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19. That is, the plurality of elastic strips 18 are prefabricated and compounded with the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19. In the production process of sanitary products, there is no need to pull dozens of elastic strips on the machine, which can greatly enhance the stability of the machine, reduce defective waste pieces, and thus bring about a significant increase in production capacity.

[0088] During the molding process of the elastic material 2 of the embodiment of the present invention, a plurality of elastic strips 18 are firstly ultrasonically compounded with the first elastic non-woven fabric to form a semi-finished product, and then ultrasonically compounded with the second elastic non-woven fabric 19. Because the elastic strips 18 are in a stretched state during extrusion and drawing, they need a skeleton for support, and the first elastic non-woven fabric 17 just plays this role; and the second elastic non-woven fabric 19 itself has a large elastic deformation. If the elastic strips 18 are first compounded with the second elastic non-woven fabric 19, it is easy to cause wrinkles on the second elastic non-woven fabric 19. When the wrinkled second elastic non-woven fabric 19 is compounded with the first elastic non-woven fabric 17, the molding material will be uneven, affecting the appearance and the stretching function of the elastic material 2.

[0089] As a preferred embodiment, the plurality of elastic strips 18 are in a stretched state during the compounding process with the first elastic nonwoven fabric 17; preferably, the stretching ratio of the plurality of elastic strips 18 is 2.0-4 times; more preferably, the stretching ratio of the plurality of elastic strips 18 is 2.2-3.5 times, or 2.5-3.5 times, or 2.2-2.8 times. When the elastic material 2 is used as the front waist circumference of the sanitary product, the stretching ratio of the elastic strips 18 can be set relatively small; and when used as the back waist circumference of the sanitary product, the stretching ratio of the elastic strips 18 can be set relatively large.

[0090] As a preferred embodiment, the first fiber is polypropylene fiber, the second fiber is polyethylene fiber; the polymer raw material is polyurethane, and the second elastic non-woven fabric 19 is polyurethane elastic non-woven fabric.

[0091] The method for preparing the anti-strangulation breathable waist elastic material provided in Example 2 has a simple process and is suitable for process production. The elastic material 2 obtained by the method for preparing the anti-strangulation breathable waist elastic material provided in Example 2 of the present invention has the superior properties that have been described in detail in Example 1 and will not be repeated here.

[0092] Example 3

[0093] like Figure 1-6 As shown in , 8-9, the breathable and comfortable trouser body structure includes an outer non-woven fabric 1, an inner non-woven fabric 3, a front waist circumference, a rear waist circumference and a waist non-woven fabric 4; the front waist circumference is sandwiched between the outer non-woven fabric 1 and the inner non-woven fabric 3 at the front waist end; the rear waist circumference is sandwiched between the outer non-woven fabric 1 and the inner non-woven fabric 3 at the rear waist end; the waist non-woven fabric 4 is arranged above the inner non-woven fabric 3, and the waist non-woven fabric 4 at least covers the front waist end and the rear waist end of the inner non-woven fabric 3. That is, the waist non-woven fabric 4 of the embodiment of the present invention is a separately set workstation, and is not formed by folding the outer non-woven fabric 1 inward (such as Figure 7 As shown, it is a cross-sectional view of a traditional pull-up pants, in which the outer non-woven fabric 1 is folded inwards, and the waist non-woven fabric 4 is used alone as an inner lining fabric to be compounded with the inner non-woven fabric 3, which can completely avoid the feeling of being squeezed or compressed caused by the contraction of the elastic band on the sanitary product, and further enhance the comfort level of the waist and abdomen; at the same time, it makes the product design more flexible and can save materials.

[0094] As a preferred embodiment, the waist nonwoven fabric 4 is a waist nonwoven fabric 4 in a contracted state. The waist nonwoven fabric 4 itself does not need to be elastic. During the forming process of the trouser body structure, the front waist and the back waist are in a stretched state during the composite operation of the machine, so that the waist nonwoven fabric 4 is in a contracted state after preparation and is in a semi-stretched state when worn.

[0095] As a preferred embodiment, the waist nonwoven fabric 4 includes a front waist nonwoven fabric and a back waist nonwoven fabric, wherein the front waist nonwoven fabric covers the front waist end of the inner nonwoven fabric 3; and the back waist nonwoven fabric covers the back waist end of the inner nonwoven fabric 3. With this arrangement, the waist nonwoven fabric 4 does not need to fully cover the inner nonwoven fabric 3, but only needs to cover the front waist area and the back waist area of ​​the inner nonwoven fabric 3, which can save the material of the waist nonwoven fabric 4 and ensure comfort. Of course, it is also possible if the waist nonwoven fabric 4 completely covers the inner nonwoven fabric 3.

[0096] As a preferred embodiment, in the vertical projection direction, the front waist nonwoven fabric completely overlaps with the front waist, or the front waist nonwoven fabric covers the front waist; the back waist nonwoven fabric completely overlaps with the back waist, or the back waist nonwoven fabric covers the back waist. In other words, the size of the front waist nonwoven fabric can be consistent with the size of the front waist, or larger than the front waist; the size of the back waist nonwoven fabric can be consistent with the size of the back waist, or larger than the back waist. This arrangement can completely avoid the elastic material 2 causing discomfort to the waist and abdomen.

[0097] As a preferred embodiment, the waist non-woven fabric 4 can be made of quick-drying fabric, such as medical gauze, which is naturally degradable and is a green environmentally friendly product with high safety and good hygroscopicity. It can quickly discharge sweat from the skin surface and keep sanitary products such as walking pants dry at all times. Of course, the waist non-woven fabric 4 can be made of other textile fabrics with quick moisture removal performance.

[0098] As a preferred embodiment, the inner layer of non-woven fabric 3 is a soft, skin-friendly SSS non-woven fabric with small deformation. The inner layer of non-woven fabric 3 cooperates with the outer layer of non-woven fabric 1 to fix the leg elastic body 9 of the crotch. At the same time, the inner layer of non-woven fabric 3 can isolate the leak-proof membrane 7 to avoid direct contact between the leak-proof membrane 7 and the outside world, thereby preventing the leak-proof membrane 7 from being scratched and causing urine leakage.

[0099] As a preferred embodiment, it also includes a disposal patch 8, which is arranged on the outer non-woven fabric 1. The disposal patch 8 is arranged on the outer side of the outer non-woven fabric 1 (i.e., the side facing away from the user's crotch).

[0100] As a preferred embodiment, it also includes a plurality of leg elastic bodies 9; the plurality of leg elastic bodies 9 are divided into two groups, namely, front waist leg elastic bodies and back waist leg elastic bodies; one end of the front waist leg elastic body is fixed between the inner non-woven fabric 3 and the front waist circumference, and the other end is fixed between the inner non-woven fabric 3 and the outer non-woven fabric 1; one end of the back waist leg elastic body is fixed between the inner non-woven fabric 3 and the back waist circumference, and the other end is fixed between the inner non-woven fabric 3 and the outer non-woven fabric 1. The leg elastic body 9 plays the role of shrinking the crotch, which can make the product fit the inner thigh, improve the product's leak-proof and body-fitting functions, and the leg elastic body 9 can form a shrink skirt, making the product more beautiful in appearance.

[0101] As a preferred embodiment, for the front waist leg elastic body, one end fixed between the inner non-woven fabric 3 and the front waist circumference is recorded as the front waist end of the elastic body, and one end fixed between the inner non-woven fabric 3 and the outer non-woven fabric 1 is recorded as the front crotch end of the elastic body; the front waist end of the elastic body is bent and extended to the front crotch end of the elastic body to form two radians with different bending directions. For the back waist leg elastic body, one end fixed between the inner non-woven fabric 3 and the back waist circumference is recorded as the back waist end of the elastic body, and one end fixed between the inner non-woven fabric 3 and the outer non-woven fabric 1 is recorded as the back crotch end of the elastic body; the back waist end of the elastic body is bent and extended to the back crotch end of the elastic body to form two radians with different bending directions. In other words, the front waist leg elastic body and the back waist leg elastic body both form an elastic body similar to an S-shaped structure, which conforms to the human body structure, makes the product more close-fitting, and improves the anti-leakage ability. When the trouser body structure provided with an S-shaped elastic band is used in conjunction with the absorbent inner body of the sanitary product, it can form the last line of defense for anti-leakage protection.

[0102] As a preferred embodiment, for the front waist leg elastic body and the back waist leg elastic body, the front crotch end of the elastic body and the back crotch end of the elastic body are arranged side by side and parallel to each other, with a reasonable structure, which can improve the leakage prevention ability and is easy to produce.

[0103] As a preferred embodiment, the front crotch end of the elastic body and the rear crotch end of the elastic body are both closer to the front waist side of the trouser body structure, and relatively far away from the rear waist side of the trouser body structure. That is, if the front waist side of the trouser body structure is folded toward the rear waist side, the front crotch end of the elastic body and the rear crotch end of the elastic body are both located on one side of the folding line and close to the front waist side. This design conforms to the human body structure, makes the product fit the user better, and improves the leakage prevention ability.

[0104] As a preferred embodiment, the number of front waist leg elastic bodies is 2 groups, which are respectively arranged on the left and right sides of the trouser body structure, and each group of front waist leg elastic bodies includes two elastic bodies; the number of back waist leg elastic bodies is 2 groups, which are respectively arranged on the left and right sides of the trouser body structure, and each group of back waist leg elastic bodies includes two elastic bodies. Two elastic bodies are used to form a group of leg elastic bodies, and the number is appropriate, which can play a good role in crotch contraction.

[0105] As a preferred embodiment, the front waistline and the back waistline are both formed by an elastic material 2; the elastic material 2 includes a first elastic nonwoven fabric 17 and a second elastic nonwoven fabric 19 composited from top to bottom, the first elastic nonwoven fabric 17 is formed by cross-laying of curled fibers; the second elastic nonwoven fabric 19 includes at least one fiber layer, the fiber layer is formed by disorderly stacking elastic fibers. More specifically, the elastic material 2 includes a first elastic nonwoven fabric 17 and a second elastic nonwoven fabric 19 composited by ultrasonic wave, the first elastic nonwoven fabric 17 includes cross-laying bicomponent curled fibers, the bicomponent curled fibers include first fibers and second fibers arranged in parallel, the first fibers and the second fibers are bonded in parallel to form curled fibers with a curling shrinkage rate of 50-60%; the gram weight of the first elastic nonwoven fabric 17 is 18-22g / ㎡, and the gram weight of the second elastic nonwoven fabric 19 is 80-100g / ㎡. For the elastic material 2 of this structure, its superior performance has been described in detail in Example 1, and will not be repeated here.

[0106] As a preferred embodiment, the front waistline and the back waistline are both formed by an elastic material 2; the elastic material 2 includes a first elastic non-woven fabric 17 and a second elastic non-woven fabric 19 composited up and down, and a plurality of elastic strips 18 arranged in sequence and sandwiched between the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19; the first elastic non-woven fabric 17 is formed by cross-laying of curly fibers; the second elastic non-woven fabric 19 includes at least one fiber layer, and the fiber layer is formed by disorderly stacking elastic fibers. More specifically, the elastic material 2 includes a first elastic nonwoven fabric 17 and a second elastic nonwoven fabric 19 which are compounded by ultrasonic wave, and a plurality of elastic strips 18 which are sequentially arranged and sandwiched between the first elastic nonwoven fabric 17 and the second elastic nonwoven fabric 19; the first elastic nonwoven fabric 17 includes a cross-laid bicomponent curly fiber, the bicomponent curly fiber includes a first fiber and a second fiber which are arranged in parallel, and the first fiber and the second fiber are bonded in parallel to form a curly fiber with a curly shrinkage rate of 50-60%; the gram weight of the first elastic nonwoven fabric 17 is 13-17g / ㎡; the gram weight of the second elastic nonwoven fabric 19 is 15-25g / ㎡; the plurality of elastic strips 18 are elastic strips 18 in a stretched state, the denier of the plurality of elastic strips 18 are all 250-300 denier, and the distance between two adjacent elastic strips 18 is 1-2mm. For the elastic material 2 of this structure, the superior performance thereof has been described in detail in Example 1, and will not be repeated here.

[0107] As a preferred embodiment, the front waistline and the back waistline are both formed by elastic materials; the elastic material includes an elastic film, and a plurality of air holes are arranged on the elastic film. More specifically, the elastic material includes a TPU elastic film, the gram weight of the TPU elastic film is 30-50g / ㎡, and a plurality of air holes are arranged on the elastic film, the aperture of the air holes is 0.5-1.5mm, and the spacing between two adjacent air holes is 5-10mm. Furthermore, the elastic material includes a TPU elastic film, the gram weight of the TPU elastic film is 30-50g / ㎡, the elasticity is moderate, and the contraction strength is appropriate. A plurality of air holes are arranged on the elastic film, and the air holes can penetrate the moisture in the sweat and excrement generated by the diaper covering the skin. The aperture of the air hole is 0.5-1.5mm, and within this aperture range, the TPU film can maintain elasticity during use; in order to ensure the resilience of the TPU film, the spacing between two adjacent air holes is 5-10mm, and the distribution of the air holes is uniform distribution or interval distribution. In addition, the air holes are preferably small round holes or small elliptical holes. Round holes or elliptical holes have the best mechanical properties and are not easy to tear the material.

[0108] As a preferred embodiment, the longitudinal lengths of the front waistline and the rear waistline can be set to be equal in length, or of course, unequal in length. For example, taking the XL size pull-up pants as an example, the longitudinal lengths of the front waistline and the rear waistline can be set to 120-150mm. According to the development of infants and young children, the elastic area with a length of 120-150mm, the front waistline can just cover the area from above the navel to above the crotch of the infant, and the rear waistline can just cover the back waist area above the buttocks of the infant. This design is close-fitting and very comfortable, and there is no need to worry about the pull-up pants sliding down or shifting due to the pull-up pants absorbing too much urine during walking.

[0109] The breathable and comfortable trouser body structure provided in Example 3 has reasonable component arrangement, good air permeability, excellent anti-strangulation performance, softness and comfort, and is suitable for use in various types of sanitary products, including pull-on pants for infants and young children, incontinence pants for adults, and physiological pants for women.

[0110] Example 4

[0111] like Figure 1-2As shown, the multiple leakproof inner body includes an absorbent core 15, an anti-side leakage partition 5 and a leakproof film 7; the left and right sides of the absorbent core 15 are provided with an anti-side leakage partition 5; the leakproof film 7 is arranged at the bottom of the absorbent core 15, and the left and right sides of the leakproof film 7 are respectively extended upward, so that the leakproof film 7 forms a U-shaped structure that wraps the left and right sides of the absorbent core 15. The leakproof film 7 is breathable and impermeable. The leakproof film 7 is not only arranged below the absorbent core 15, but also arranged on both sides of the anti-side leakage absorbent core 15, which can greatly enhance the leakproof performance of the product. The leakproof film 7 forms a U-shaped leakproof structure, and the height of both sides of the leakproof film 7 can be the same as the side height of the absorbent core 15, or lower than the side height of the absorbent core 15. As long as the leakproof film 7 forms a U-shaped structure that at least wraps a part of the side of the absorbent core 15, the side leakage prevention performance of the product can be greatly improved. The leakproof film 7 will present a more three-dimensional U-shaped state during actual use, which can better keep the liquid inside the U shape and make it difficult to leak out.

[0112] For the conventional inner body, the leakproof film 7 is only arranged at the bottom of the absorbent core 15, and the leakproof film 7 is bonded to the outer layer of the leakproof side edge 5 by hot melt adhesive. If the amount of adhesive applied is low, it is likely to cause a gap between the leakproof film 7 and the outer layer of the leakproof side edge 5, causing liquid to flow out through the gap between the leakproof film 7 and the leakproof side edge 5. However, the leakproof film 7 of the embodiment of the present invention is arranged between the two layers of the leakproof side edge 5, and is glued on both sides, so the probability of side leakage is extremely low.

[0113] As a preferred embodiment, the multiple leak-proof inner body includes an absorbent core 15, an anti-side leakage partition 5 and a leak-proof membrane 7; at least one longitudinally extending first elastomer 14 is built into the left and right sides of the absorbent core 15; the left and right sides of the absorbent core 15 are provided with anti-side leakage partitions 5, and the upper parts of the anti-side leakage partitions 5 are folded inward to form free ends, and at least one longitudinally extending second elastomer 10 is provided in the free ends; the leak-proof membrane 7 is provided at the bottom of the absorbent core 15, and the left and right sides of the leak-proof membrane 7 are respectively extended upward, so that the leak-proof membrane 7 forms a U-shaped structure that wraps the left and right sides of the absorbent core 15.

[0114] The first elastic body 14 is also called the core plane elastic band. The core plane elastic band is set to shrink the absorbent core 15 into an inverted Ω shape through the contraction of the elastic band during use, so that the absorbent core 15 can wrap the baby's vulva / genitals and is not easy to leak urine. The second elastic body 10 is also called a leak-proof three-dimensional elastic band. The second elastic body 10 can make the anti-side leakage partition 5 stand up better during use, thereby improving the anti-leakage ability. The multiple leak-proof inner body is further provided with a leak-proof three-dimensional elastic band on the basis of the core plane elastic band, which can keep the absorbent core 15 in an inverted Ω state, and avoid the inverted Ω-shaped absorbent core 15 from becoming a U-shape or a straight shape due to the gravity of urine, thereby playing a double role in preventing side leakage. The leak-proof three-dimensional elastic band is in a semi-stretched state when in use, which can release the leak-proof ability without causing damage to the skin due to excessive stretching.

[0115] As a preferred embodiment, the lower part of the anti-side leakage partition 5 is folded inward to form a fixed end, and the left and right sides of the anti-leakage membrane 7 are respectively extended outward through the fixed end of the anti-side leakage partition 5 and embedded in the anti-side leakage partition 5. The anti-leakage membrane 7 of the embodiment of the present invention is built in the middle of the anti-side leakage partition 5, and is double-sided adhesive, so the probability of side leakage is extremely low, which can greatly enhance the product's ability to prevent side leakage.

[0116] As a preferred embodiment, the anti-leakage membrane 7 extends into the free end of the anti-side leakage partition 5 to further improve the anti-side leakage capability.

[0117] As a preferred embodiment, the leakproof membrane 7 is a PE leakproof membrane 7 which is air-permeable and water-impermeable.

[0118] As a preferred embodiment, during use of the inner body, the surface layer 11 is in direct contact with human skin, aiming to give the skin a good contact feeling and low friction, while reducing the liquid content in the surface layer 11 to keep the skin dry. The material of the surface layer 11 is preferably a material with very fine fibers, which is soft and skin-friendly.

[0119] As a preferred embodiment, the absorbent core 15 includes an absorbent inner core 12, an inner core wrapping cloth 6 and a surface layer 11, and at least one longitudinally extending first elastic body 14 is respectively arranged on the left and right sides of the absorbent inner core 12; the inner core wrapping cloth 6 contains the absorbent inner core 12 and the first elastic body 14 to form a core body; the surface layer 11 at least covers the top surface of the core body. In this embodiment, the first elastic body 14 is first arranged on both sides of the absorbent inner core 12, and then wrapped by the inner core wrapping cloth 6, rather than first wrapping the absorbent inner core 12 with the inner core wrapping cloth 6, and then the first elastic body 14 is arranged on both sides thereof, and then wrapped again by the covering layer 13. The arrangement method of the embodiment of the present invention has the advantages that: the first elastic body 14 (core plane elastic) is a highly elastic material, and the covering layer 13 is a low-weight non-woven fabric. During the operation of the machine, it is easily affected by the traction and tension of the machine, which easily leads to the reciprocating fluctuation of the composite station of the first elastic body 14 and the covering layer 13, resulting in the first elastic body 14 being loose on one side and tight on the other, which will greatly reduce the protective ability of the first elastic body 14. At the same time, material fluctuations will lead to unstable production processes, affect the efficiency of the machine, and increase invisible maintenance costs. However, the embodiment of the present invention arranges the first elastic body 14 on both sides of the absorbent inner core 12, and then uses the inner core wrapping cloth 6 to wrap them, which can well avoid the above problems.

[0120] As a preferred embodiment, the inner core wrapping cloth 6 is arranged at the bottom of the absorbent inner core 12, and the inner core wrapping cloth 6 is folded upward to cover at least a portion of the top surface of the absorbent inner core 12. This design can prevent the polymer resin particles of the absorbent inner core 12 from being exposed. The inner core wrapping cloth 6 can fully cover the top surface of the absorbent inner core 12, but in order to save costs, the inner core wrapping cloth 6 can only cover a portion of the top surface of the absorbent inner core 12. This arrangement can save materials and prevent the polymer resin particles from being exposed.

[0121] As a preferred embodiment, it also includes a covering layer 13, which covers the top surface of the core body and folds downward to cover at least a portion of the bottom surface of the core body; the surface layer 11 is arranged on the top surface of the covering layer 13. The covering layer 13 is made of SMS hydrophilic non-woven fabric, and its main function is to prevent urine from seeping back to the surface after absorption, and to prevent the polymer resin particles of the absorbent core 12 from being exposed. The traditional inner body lacks a covering layer 13. The covering layer 13 of the embodiment of the present invention is compounded with the skin-friendly surface layer 11, so that the fibers become very dense, so that the SAP particles in the absorbent core 12 cannot pass through the dense layer formed between the covering layer 13 and the skin-friendly surface layer 11 during the extrusion process, thereby avoiding leakage. This design can ensure that the number of SAP water-absorbing particles on the surface layer 11 is ≤5.

[0122] As a preferred embodiment, the number of the second elastic bodies 10 is 2, 3, 4 or 5. More preferably, the number of the second elastic bodies 10 is 4, and 4 second elastic bodies 10 are respectively arranged in the anti-side leakage partition 5 on the left and right sides, so that the anti-side leakage partition 5 forms a more three-dimensional structure when in use. Furthermore, for the 4 second elastic bodies 10, the spacing between the roots is 5mm-6.25mm. However, the conventional anti-side leakage partition 5 only has 2 elastic bodies arranged therein, and the height of the elastic extension area is only about 5mm. The anti-side leakage partition 5 is easy to turn outward. After the absorbent core 15 absorbs the liquid, the anti-side leakage partition 5 is flattened from the U shape due to the action of gravity, and the anti-leakage ability gradually decreases. In the embodiment of the present invention, when four second elastic bodies 10 are arranged on each side of the anti-leakage partition 5, the height of the elastic extension area of ​​the anti-leakage partition 5 can reach 15-20 mm, which is in an upright state during actual use, and can cooperate with the first elastic body 14 (core flat elastic band) to keep the inner body in a teardrop shape, greatly enhancing the ability to prevent urine leakage.

[0123] As a preferred embodiment, the inner body is a rectangular inner body, which conforms to the human body structure and is convenient for absorbing urine. Meanwhile, the rectangular structure is also convenient for production.

[0124] The multiple leak-proof inner body provided in Example 4 has a reasonable structure, and the inward roll height on both sides of the absorbent core 15 is preferably 10-15mm. When the diaper is worn, the crotch area can form a shape similar to a water drop, which is in a smooth state and can hold urine. Because the absorbent core 15 plane elastic bands are set on both sides of the absorbent inner core 12, the core part of the inward roll on both sides of the absorbent core 15 is set as the first leak-proof protection system, which can not only withstand the first wave of impact force during urine excretion and slow down the fluidity of urine, but also has an absorption function. Even if part of the urine rushes out of the first leak-proof protection system and temporarily flows to the outside of the absorbent core 15, because the absorbent core 15 has two-sided absorption performance, it can also be absorbed by the absorbent core 15. If the absorption capacity of the absorbent core 15 decreases and the absorption speed decreases after absorbing liquid multiple times, the second leak-proof protection system composed of the side leakage prevention edge 5, the leak-proof membrane 7 and the second elastic body 10 (leak-proof three-dimensional elastic band) begins to play a role. Even when lying on the side, the anti-leakage partition 5 has 4 elastic bands and a standing height of 62mm, which can block about 80ml of liquid with low fluidity (80ml of liquid is about the amount of urine excreted by a 12-month-old infant at a time, data taken from GB / T28004-2011 Diapers, Sheets and Pads). Finally, when the diaper is forgotten to be changed or has not been changed for a long time for other reasons, when it reaches the limit of use, the teardrop-shaped inner part is gradually flattened. At this time, the leg elastic body 9 (S-shaped elastic band) set in the bottom trouser body (such as butterfly trouser body) plays a role and serves as the final protection to maintain the teardrop-shaped inner shape.

[0125] In summary, the inner body provided in Example 4 is provided with two anti-leakage protection systems in total. When the product is formed, it cooperates with the leg elastic body 9 in the trouser body, so that the product can form a total of three anti-leakage protection systems, which has a strong ability to prevent side leakage.

[0126] Example 5

[0127] like Figure 1-6 As shown in 8-9, the comfortable and leak-proof sanitary product for preventing strangulation and leakage comprises the anti-strangulation and breathable waist elastic material 2 of Example 1. Since the comfortable and leak-proof sanitary product for preventing strangulation and leakage of Example 5 comprises the anti-strangulation and breathable waist elastic material 2 of Example 1, the comfortable and leak-proof sanitary product for preventing strangulation and leakage of Example 5 has all the superior properties of the anti-strangulation and breathable waist elastic material 2 of Example 1, which will not be described in detail here.

[0128] Example 6

[0129] The anti-strangulation and anti-leakage comfortable sanitary product comprises the breathable and comfortable trouser body structure of Example 3. Since the anti-strangulation and anti-leakage comfortable sanitary product of Example 6 comprises the breathable and comfortable trouser body structure of Example 3, the anti-strangulation and anti-leakage comfortable sanitary product of Example 6 has all the superior properties of the breathable and comfortable trouser body structure of Example 3, which will not be described in detail here.

[0130] Example 7

[0131] The anti-strangulation and anti-leakage comfortable sanitary product comprises the multiple anti-leakage inner body of Example 4. Since the anti-strangulation and anti-leakage comfortable sanitary product of Example 7 comprises the multiple anti-leakage inner body of Example 4, the anti-strangulation and anti-leakage comfortable sanitary product of Example 7 has all the superior properties of the multiple anti-leakage inner body of Example 4, which will not be described in detail here.

[0132] Example 8

[0133] like Figure 1-6 As shown in 8-9, the anti-strangulation and anti-leakage comfortable sanitary product includes a base trouser body and an inner body arranged on the base trouser body; the base trouser body includes a front waistline and a back waistline, the front waistline is formed by an anti-strangulation and breathable waistline elastic material 2; the back waistline is formed by an anti-strangulation and breathable waistline elastic material 2.

[0134] As a preferred embodiment, the anti-strangulation breathable waist elastic material 2 includes a first elastic non-woven fabric 17 and a second elastic non-woven fabric 19 composited by ultrasonic wave, the first elastic non-woven fabric 17 includes cross-laid bi-component curly fibers, the bi-component curly fibers include polypropylene fibers and polyethylene fibers arranged in parallel, the polypropylene fibers and the polyethylene fibers are bonded in parallel to form curly fibers with a curling shrinkage rate of 50-60%; the gram weight of the first elastic non-woven fabric 17 is 18-22g / ㎡; the second elastic non-woven fabric 19 includes at least one polyurethane fiber layer, the polyurethane fiber layer is formed by disorderly stacking polyurethane elastic fibers, and the gram weight of the second elastic non-woven fabric 19 is 80-100g / ㎡.

[0135] As a preferred embodiment, the anti-strangulation breathable waist elastic material 2 includes a first elastic non-woven fabric 17 and a second elastic non-woven fabric 19 which are ultrasonically compounded, and a plurality of elastic strips 18 which are sequentially arranged and sandwiched between the first elastic non-woven fabric 17 and the second elastic non-woven fabric 19; the first elastic non-woven fabric 17 includes cross-laid bicomponent curly fibers, the bicomponent curly fibers include polypropylene fibers and polyethylene fibers which are arranged in parallel, and the polypropylene fibers and the polyethylene fibers are bonded in parallel to form curly fibers with a curling shrinkage rate of 50 to 60%; The gram weight of an elastic non-woven fabric 17 is 13-17 g / ㎡; the second elastic non-woven fabric 19 includes at least one polyurethane fiber layer, which is formed by randomly stacking polyurethane elastic fibers. The gram weight of the second elastic non-woven fabric 19 is 15-25 g / ㎡, and the stretching ratio is 3 to 4 times; the plurality of elastic strips 18 are elastic strips 18 in a stretched state, the deniers of the plurality of elastic strips 18 are all 250-300 deniers, and the spacing between two adjacent elastic strips 18 is 1-2 mm; the stretching ratio of the rear waist circumference is greater than or equal to the stretching ratio of the front waist circumference.

[0136] As a preferred embodiment, the elastic material 2 includes a TPU elastic film, the weight of the TPU elastic film is 30-50g / ㎡, the elasticity is moderate, and the contraction strength is appropriate. The elastic film is provided with a number of air holes, which can let out the moisture in the sweat and excrement generated by the diaper covering the skin. The aperture of the air hole is 0.5-1.5mm, and within this aperture range, the TPU film can maintain elasticity during use; in order to ensure the resilience of the TPU film, the spacing between two adjacent air holes is 5-10mm, and the distribution of the air holes is uniform or spaced. In addition, the air holes are preferably small round holes or small elliptical holes. The mechanical properties of round holes or elliptical holes are the most superior and the material is not easily torn.

[0137] As a preferred embodiment, the inner body includes an absorbent core 15, an anti-leakage border 5 and a anti-leakage membrane 7; at least one longitudinally extending first elastomer 14 is built into the left and right sides of the absorbent core 15; the left and right sides of the absorbent core 15 are provided with anti-leakage borders 5, the upper part of the anti-leakage borders 5 is folded inward to form a free end, and at least one longitudinally extending second elastomer 10 is provided in the free end; the anti-leakage membrane 7 is provided at the bottom of the absorbent core 15, and the left and right sides of the anti-leakage membrane 7 are respectively extended upward, so that the anti-leakage membrane 7 forms a U-shaped structure that wraps the left and right sides of the absorbent core 15.

[0138] As a preferred embodiment, the lower part of the leakage prevention edge 5 is folded inward to form a fixed end, and the left and right sides of the leakage prevention membrane 7 extend outward through the fixed end of the leakage prevention edge 5 and are embedded in the leakage prevention edge 5.

[0139] As a preferred embodiment, the anti-leakage membrane 7 extends into the free end of the anti-side leakage partition 5 .

[0140] As a preferred embodiment, the absorbent core 15 includes an absorbent inner core 12, an inner core wrapping cloth 6 and a surface layer 11, and at least one longitudinally extending first elastomer 14 is respectively provided on the left and right sides of the absorbent inner core 12; the inner core wrapping cloth 6 encloses the absorbent inner core 12 and the first elastomer 14 to form a core body; the surface layer 11 at least covers the top surface of the core body.

[0141] As a preferred embodiment, it also includes a covering layer 13 , which covers the top surface of the core body and folds downward to cover at least a portion of the bottom surface of the core body; the surface layer 11 is arranged on the top surface of the covering layer 13 .

[0142] As a preferred embodiment, the number of the second elastic bodies 10 is 2, 3, 4 or 5.

[0143] As a preferred embodiment, the bottom trouser body also includes an outer non-woven fabric 1, an inner non-woven fabric 3 and a waist non-woven fabric 4; the front waist is sandwiched between the outer non-woven fabric 1 and the inner non-woven fabric 3 at the front waist end; the back waist is sandwiched between the outer non-woven fabric 1 and the inner non-woven fabric 3 at the back waist end; the waist non-woven fabric 4 is arranged above the inner non-woven fabric 3, and the waist non-woven fabric 4 at least covers the front waist end and the back waist end of the inner non-woven fabric 3.

[0144] As a preferred embodiment, the waist nonwoven fabric 4 includes a front waist nonwoven fabric 4 and a back waist nonwoven fabric 4 , wherein the front waist nonwoven fabric 4 covers the front waist end of the inner nonwoven fabric 3 ; and the back waist nonwoven fabric 4 covers the back waist end of the inner nonwoven fabric 3 .

[0145] As a preferred embodiment, the waist nonwoven fabric 4 is made of medical gauze.

[0146] As a preferred embodiment, it also includes a plurality of leg elastic bodies 9; the plurality of leg elastic bodies 9 are divided into two groups, namely the front waist leg elastic bodies and the back waist leg elastic bodies; one end of the front waist leg elastic body is fixed between the inner layer of non-woven fabric 3 and the front waist circumference, and the other end is fixed between the inner layer of non-woven fabric 3 and the outer layer of non-woven fabric 1; one end of the back waist leg elastic body is fixed between the inner layer of non-woven fabric 3 and the back waist circumference, and the other end is fixed between the inner layer of non-woven fabric 3 and the outer layer of non-woven fabric 1.

[0147] As a preferred embodiment, for the front waist side leg elastic body, one end fixed between the inner layer non-woven fabric 3 and the front waistline is recorded as the front waist end of the elastic body, and the other end fixed between the inner layer non-woven fabric 3 and the outer layer non-woven fabric 1 is recorded as the front crotch end of the elastic body; the front waist end of the elastic body is bent and extended toward the front crotch end of the elastic body to form two arcs with different bending directions.

[0148] As a preferred embodiment, for the back waist side leg elastic body, one end fixed between the inner layer non-woven fabric 3 and the back waist circumference is recorded as the back waist end of the elastic body, and the other end fixed between the inner layer non-woven fabric 3 and the outer layer non-woven fabric 1 is recorded as the back crotch end of the elastic body; the back waist end of the elastic body is bent and extended toward the back crotch end of the elastic body to form two arcs with different bending directions.

[0149] As a preferred embodiment, the sanitary product is a pair of infant learning pants, also known as infant pull-up pants. When the sanitary product is a pair of infant learning pants, after the trouser body structure and the inner body are assembled, they are folded in half, and then the trouser body is sewn through the joints 16 on both sides of the waist.

[0150] The anti-strangulation and anti-leakage comfortable sanitary product of Example 8 may include one or more of the three major components, namely, the anti-strangulation and breathable waist elastic material 2 of Example 1, the breathable and comfortable trouser body structure of Example 3, and the multiple anti-leakage inner body of Example 4, and they are reasonably combined with each other through optimized design. Therefore, the anti-strangulation and anti-leakage comfortable sanitary product provided by Example 8 has all the superior properties of the anti-strangulation and breathable waist elastic material 2 of Example 1, the breathable and comfortable trouser body structure of Example 3, and the multiple anti-leakage inner body of Example 4, which will not be repeated here.

[0151] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A comfortable and leak-proof sanitary product, characterized in that: The pants include a bottom trouser body and an inner body arranged on the bottom trouser body; the bottom trouser body includes a front waistline and a back waistline, the front waistline is formed by an anti-strangulation breathable waist elastic material; the back waistline is formed by the anti-strangulation breathable waist elastic material; The anti-strangulation breathable waist elastic material comprises a first elastic non-woven fabric, a second elastic non-woven fabric and a plurality of elastic strips which are laminated up and down; the first elastic non-woven fabric comprises cross-laid bi-component curly fibers, the bi-component curly fibers comprise first fibers and second fibers which are arranged in parallel, and the first fibers and the second fibers are bonded in parallel to form curly fibers; the second elastic non-woven fabric comprises at least one fiber layer formed by disorderly stacking elastic fibers; the plurality of elastic strips are sequentially arranged between the first elastic non-woven fabric and the second elastic non-woven fabric; the first elastic non-woven fabric has a gram weight of 13-17 g / ㎡; the second elastic non-woven fabric has a gram weight of 15-25 g / ㎡; the plurality of elastic strips are in a stretched state; the stretching ratio of the plurality of elastic strips is 2.0-4 times; The inner body includes an absorbent core, an anti-leakage edge and an anti-leakage membrane; the absorbent core includes an absorbent inner core, an inner core wrapping cloth and a surface layer, and at least one longitudinally extending first elastic body is respectively arranged on the left and right sides of the absorbent inner core; the inner core wrapping cloth contains the absorbent inner core and the first elastic body to form a core body; the surface layer at least covers the top surface of the core body; the left and right sides of the absorbent core are respectively provided with anti-leakage edges, and the upper part of the anti-leakage edge is folded inward to form a free end, and at least one longitudinally extending second elastic body is arranged in the free end; the anti-leakage membrane is arranged at the bottom of the absorbent core, and the left and right sides of the anti-leakage membrane are respectively extended upward, so that the anti-leakage membrane forms a U-shaped structure wrapping the left and right sides of the absorbent core.

2. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The deniers of the plurality of elastic strips are all 250-300 deniers; and the distance between two adjacent elastic strips is 1-2 mm.

3. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The stretching ratio of some of the elastic bands is 2.2-3.5 times.

4. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The stretching ratio of some of the elastic bands is 2.5-3.5 times.

5. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The stretching ratio of some of the elastic bands is 2.2-2.8 times.

6. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The plurality of elastic strips are arranged transversely in sequence and fixed between the first elastic non-woven fabric and the second elastic non-woven fabric by ultrasonic wave, and a plurality of ultrasonic bonding sites are formed on each of the elastic strips.

7. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The first elastic non-woven fabric has a gram weight of 18-22 g / m2; the second elastic non-woven fabric has a gram weight of 80-100 g / m2.

8. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1 or 2, characterized in that: The first fiber is polypropylene fiber, the second fiber is polyethylene fiber; and the second elastic non-woven fabric is polyurethane elastic non-woven fabric.

9. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The curling shrinkage rate of the curled fiber is 50-60%; the stretching ratio of the second elastic non-woven fabric is 3-4 times.

10. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The method for preparing the anti-strangulation breathable waist elastic material comprises the following steps: The first elastic nonwoven fabric preparation step: extruding the molten first fiber and the second fiber side by side to form a single fiber filament, the single fiber filament is cooled to form a curly fiber, taking the curly fiber and cross-laying it and fixing it by thermal bonding to obtain the first elastic nonwoven fabric; wherein the first fiber and the second fiber have different heat shrinkage strengths; The second elastic non-woven fabric preparation step: spraying a high-temperature molten polymer raw material through a spinneret to form elastic filaments, the elastic filaments overlap each other in a disordered manner, and after cooling, they adhere to each other to obtain the second elastic non-woven fabric; Compounding step: Compounding the first elastic nonwoven fabric and the second elastic nonwoven fabric to obtain.

11. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 10, characterized in that: In the compounding step, a plurality of elastic strips are taken, and the plurality of elastic strips are arranged in sequence and bonded on the first elastic non-woven fabric by ultrasonic bonding to form a semi-finished product, and then the second elastic non-woven fabric is compounded with the semi-finished product by ultrasonic bonding, so that the plurality of elastic strips are sandwiched between the first elastic non-woven fabric and the second elastic non-woven fabric.

12. The anti-strangulation and anti-leakage comfortable sanitary product according to claim 1, characterized in that: The bottom trouser body also includes an outer non-woven fabric, an inner non-woven fabric and a waist non-woven fabric; the front waist is sandwiched between the outer non-woven fabric and the inner non-woven fabric at the front waist end; the back waist is sandwiched between the outer non-woven fabric and the inner non-woven fabric at the back waist end; the waist non-woven fabric is arranged above the inner non-woven fabric, and the waist non-woven fabric at least covers the front waist end and the back waist end of the inner non-woven fabric.

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