High weld strength welded structure for elastic waist feature with elastic waistband and pull-on diaper

Abstract

The utility model relates to high welding strength welding structure and elastic waist and pull -on pants for elastic waist part, wherein, elastic waist part is constituted by inside, outside waist no -woven cloth and spandex silk, is equipped with the short cutting cloth of welding position between inside, outside waist no -woven cloth or the outside of inside waist no -woven cloth far from outside waist no -woven cloth, through welding connection, will weld the short cutting cloth of position and inside, outside waist no -woven cloth connect, form the welding structure of high welding strength, and further provide the elastic waist of high welding strength welding structure, the elastic waist includes the front elastic waist part, the back elastic waist part forms annular panty mouth structure through welding, then between inside, outside waist no -woven cloth of front elastic waist part or / and back elastic waist part, or in the outside of inside waist no -woven cloth far from outside waist no -woven cloth, is equipped with the short cutting cloth of welding position, when carrying out end side edge welding connection to front, back elastic waist part, the short cutting cloth of welding position is integrally welded with two waist no -woven cloth respectively.

Description

Technical Field

[0001] This utility model relates to the field of moisture-wicking products, specifically to a high-strength welded structure for elastic waist components and elastic waistbands and pull-up pants. It is mainly used in scenarios such as infant and toddler care, adult incontinence care, and menstrual women care, providing users with comfortable, well-fitting care products with good moisture-wicking function. Background Technology

[0002] In the field of moisture-wicking products, pull-up diapers / menstrual pants are widely used for infants, menstrual care, and adults requiring incontinence care due to their advantages such as ease of wear, close fit, and freedom of movement. Pull-up diapers / menstrual pants, including three-piece, two-piece, and one-piece designs, are particularly popular. Among them, hot-air waistband pull-up diapers, with their soft touch and high loft, have become one of the mainstream products on the market.

[0003] Traditional hot-air pull-up trousers typically employ a structural design where the outer waistband non-woven fabric is folded inwards, and this folded fabric is then used to cover the inner components to form the front and back waistband structure. However, this structural design has a significant drawback: On the one hand, the inner part of the welding position is made of hot air non-woven fabric. The PET material characteristics of hot air non-woven fabric make it difficult to melt during the welding process, which is not conducive to the smooth progress of the welding operation. It is easy to cause problems such as weak welding and cracking, which affects the use of the product.

[0004] On the other hand, since the outer waistband nonwoven fabric needs to be folded inward to cover the inner components, in order to ensure the coverage and the integrity of the waistband structure, a wider size of hot-air nonwoven fabric is often required. This undoubtedly increases the raw material cost of the product and reduces the product's market competitiveness.

[0005] As market demands for the quality of pull-up diapers / menstrual pants continue to rise and the need for production cost control becomes increasingly urgent, the problems of traditional hot-air pull-up diapers in terms of welding convenience and cost are becoming more and more prominent. There is an urgent need for a new type of pull-up diaper / menstrual pants structural design that can solve the above problems. Utility Model Content

[0006] To address the technical problems existing in the background art, namely the instability of welding of the waistband structure of pull-up trousers, the poor performance of elastic components, and the high production and maintenance costs caused by multi-head ultrasonic welding of existing elastic waistbands, this application provides a high-weld-strength welding structure for the elastic waistband component, thereby providing an elastic waistband with a high-weld-strength welding structure, and finally obtaining pull-up trousers containing this elastic waistband. This solves the problems of insufficient welding stability and strength at the welding position of pull-up trousers, avoids the shrinkage of spandex yarn, especially fine denier spandex yarn, and avoids the technical problems of decreased elasticity caused by multiple layers of materials.

[0007] To achieve the above objectives, this utility model provides a technical solution for a high-weld-strength welded structure for an elastic waist component: The elastic waist component uses a high-strength welded structure. The elastic waist component is composed of an outer waist nonwoven fabric, an inner waist nonwoven fabric, and spandex yarn between them. The end sides of the outer and inner waist nonwoven fabrics are welded together. Its structural feature is that at least one layer of welded short-cut fabric is adapted to be provided between the outer and inner waist nonwoven fabrics, or at the outer side of the inner waist nonwoven fabric away from the outer waist nonwoven fabric, in the welding area corresponding to the end side welding connection. This is such that the outer and inner waist nonwoven fabrics are located on both sides of the welded short-cut fabric, or the outer, inner, and welded short-cut fabrics are arranged sideways in sequence. The welded short-cut fabric is connected to the two waist nonwoven fabrics by welding, and the high-strength welded structure is constructed by the welded short-cut fabric.

[0008] Based on the above technical solutions, this application further provides a technical solution for an elastic waistband with a high welding strength welded structure. The elastic waistband with the high welding strength welded structure includes a front elastic waist component (2) and a rear elastic waist component (3). The front elastic waist component (2) and the rear elastic waist component (3) are connected by welding at their ends to form a closed annular leg opening structure. Each elastic waist component is composed of an outer waistband nonwoven fabric (8), an inner waistband nonwoven fabric (9), and spandex yarn (10) disposed between the two. Its structural features are as follows: Firstly, at least one of the elastic waist components is provided with one or more layers of short-cut fabric (12) at the welding area corresponding to the end side welding.

[0009] The position structure (distribution structure) of the welded short chopped fabric (12) is such that the outer waist nonwoven fabric and the inner waist nonwoven fabric are located on both sides of the welded short chopped fabric, or the outer waist nonwoven fabric, the inner waist nonwoven fabric and the welded short chopped fabric are arranged side by side in sequence, including: the welded short chopped fabric (12) is located between the outer waist nonwoven fabric and the inner waist nonwoven fabric, so that the outer waist nonwoven fabric and the inner waist nonwoven fabric are located on both sides of the welded short chopped fabric; Alternatively, the short-cut fabric at the welding position (12) may be located on the outer side of the inner waist nonwoven fabric away from the outer waist nonwoven fabric, such that the outer waist nonwoven fabric, the inner waist nonwoven fabric and the short-cut fabric at the welding position are arranged side by side in sequence.

[0010] Secondly, when the front elastic waist component (2) and the rear elastic waist component (3) are connected by end-side welding, the short-cut fabric (12) at the welding position is welded to the two waist non-woven fabrics to form a whole, and the elastic waist with high welding strength is constructed by the short-cut fabric at the welding position.

[0011] Preferably, in a specific embodiment, the position structure includes: The short-cut fabric (12) at the welding position is located between the outer waist nonwoven fabric and the inner waist nonwoven fabric of the front elastic waist component (2), or at the outer side of the inner waist nonwoven fabric away from the outer waist nonwoven fabric. Or / and, the welded short-cut fabric (12) is located between the outer waist nonwoven fabric and the inner waist nonwoven fabric of the rear elastic waist component (3), or at a position on the outer side of the inner waist nonwoven fabric away from the outer waist nonwoven fabric.

[0012] In summary, the elastic waistband with a high welding strength welded structure is an elastic waistband with short-cut fabric at the weld position.

[0013] Among them, welding connection, namely hot welding, is a well-known welding technology in the field, and belongs to the hot melt connection method of thermoplastic nonwoven fabrics that is familiar to those skilled in the art.

[0014] Preferably, the front elastic waist component and the rear elastic waist component are each fitted with short-cut fabric at the welding position between the outer waist nonwoven fabric and the inner waist nonwoven fabric, so that the front elastic waist component and the rear elastic waist component have an equal number of layers.

[0015] Preferably, between the front elastic waist component (2) and the rear elastic waist component (3), at least one layer of welded short-cut fabric (12) is also adapted to be provided in the welding area corresponding to the end side welding, so that the front elastic waist component (2) and the rear elastic waist component (3) are located on both sides of the welded short-cut fabric.

[0016] Preferably, a seam welding point with a width of 1.0-12.0 mm is provided at the overlapping seam position between the inner waist nonwoven fabric (9), the short-cut fabric (12) at the welding position and the outer waist nonwoven fabric (8). Further, the heat welding point at the seam with this width is preferably 3.0-6.0 mm wide.

[0017] Preferably, for the front elastic waist component (2) and the rear elastic waist component, at least one of the elastic waist components is composed of an outer waist nonwoven fabric (8), a short-cut fabric (12) for welding positions, and an inner waist nonwoven fabric (9).

[0018] Preferably, the outer waistband nonwoven fabric (8) is not folded and is not inserted between the front elastic waistband component (2) and the rear elastic waistband component (3). However, in other embodiments, the outer waistband nonwoven fabric (8) may be folded and inserted between the front elastic waistband component (2) and the rear elastic waistband component (3), or the combination of the outer waistband nonwoven fabric and the inner waistband nonwoven fabric in each elastic waistband component may be folded between the front elastic waistband component (2) and the rear elastic waistband component (3).

[0019] Preferably, by slitting and shaving, the end sides of the front elastic waist component (2) and the rear elastic waist component are formed into neat side edges (13), and the distance between the side edge and the closest spandex filament (14) is 1-10mm.

[0020] Preferably, the short-cut fabric (12) at the welding position is PP spunbond nonwoven fabric or PP spunmelt nonwoven fabric.

[0021] Preferably, the spandex yarn (10) is selected from coarse denier spandex yarn with a specification of 300-940D or fine denier spandex yarn with a specification of 40-210D.

[0022] Preferably, the spandex filament (10) is located between the outer waist nonwoven fabric (8) and the short-cut fabric (12) at the welding position, or between the short-cut fabric (12) at the welding position and the inner waist nonwoven fabric (9).

[0023] Preferably, the spandex filament is a fine denier spandex filament (10) and is located between the short-cut fabric (12) at the welding position and the inner waistband nonwoven fabric (9).

[0024] Preferably, the spandex filament (10) is simultaneously located between the outer waist nonwoven fabric (8) and the welded short chopped fabric (12), and between the welded short chopped fabric (12) and the inner waist nonwoven fabric (9), thereby forming an outer spandex filament layer and an inner spandex filament layer, respectively.

[0025] Preferably, the spandex filament is fine denier spandex filament (10), and the spandex filaments in both spandex filament layers are distributed with equal spacing, and the gap between two adjacent spandex filaments (10) is 1.5-7.0 mm.

[0026] Preferably, the spandex yarn is fine denier spandex yarn (10), and the gap between the spandex yarns in the outer spandex yarn layer and the gap between the spandex yarns in the inner spandex yarn layer are unequal.

[0027] Based on the above-mentioned elastic waistband implementation technical solution, this application further provides a pull-up panty, including an inner component (1) and an elastic waistband. The elastic waistband is composed of a front elastic waist component (2) and a rear elastic waist component (3). The inner component (1) is composed of a liquid-permeable top layer (4), a liquid-impermeable anti-leakage layer (5), a liquid-impermeable bottom layer (6), and an absorbent layer (7). Its structural feature is that the elastic waistband adopts the elastic waistband with a high welding strength welding structure described in this application.

[0028] Preferably, the front elastic waist component (2) and the rear elastic waist component (3) are an integral structure, which are folded in half and then welded together at the ends to form the annular trouser leg structure.

[0029] Preferably, a short-cut inner covering fabric (11) is also provided, and the inner component (1) is fixedly connected to the front elastic waist component (2) and the rear elastic waist component (3) respectively through the short-cut inner covering fabric (11).

[0030] Preferably, the width of the short-cut inner covering fabric (11) is the same as the width of the inner component (1), or slightly wider than the width of the inner component (1).

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, this application sets a short-cut fabric (12) at the welding position between the outer waistband nonwoven fabric (8) and the inner waistband nonwoven fabric (9), which effectively increases the number of welding layers between the inner and outer waistband nonwoven fabrics (8 / 9). At the same time, a heat welding point is set at the overlapping seam. The two work together to significantly improve the welding firmness of the elastic waist component, avoid the phenomenon of detachment during use, and extend the service life of the pull-up pants.

[0032] Secondly, at the overlapping seam between the inner waist nonwoven fabric (9), the welded short-cut fabric (12), and the outer waist nonwoven fabric (8, i.e., the outer waist hot-air nonwoven fabric), a seam welding point with a width of 3.0-8.0 mm is also provided. The setting of this seam welding point (hot welding point) can further strengthen the connection between the inner waist nonwoven fabric (9), the welded short-cut fabric (12), and the outer waist nonwoven fabric (8), and prevent delamination at the seam during use. The preferred width range can achieve the best balance between welding strength and user comfort.

[0033] Thirdly, the outer waistband hot air method non-woven fabric is not folded and is not interlaced between the front elastic waist component (2) and the rear elastic waist component (3). At the same time, the structural design of the upper and lower ends of the front elastic waist component (2) and the rear elastic waist component (3) is optimized, and the distribution of the elastic waist components with equal number of layers is realized, which reduces the welding instability and weak welding caused by the difference in the number of layers, or the need for more expensive multi-head ultrasonic equipment, which increases the overall equipment cost.

[0034] Fourth, spandex yarn (10) offers two specifications: coarse denier and fine denier, and has multiple setting positions and gap distribution methods, which can be flexibly adjusted according to different usage needs. This ensures the elastic effect and support of the elastic waist component, while also improving the fit and comfort of the garment, thus meeting the usage needs of different user groups.

[0035] Finally, the inner garment component (1) is fixed to the front elastic waist component (2) and the rear elastic waist component (3) by cutting the inner garment cover fabric (11). The width of the cut inner garment cover fabric (11) matches the width of the inner garment, which effectively enhances the fixing stability of the inner garment component (1), prevents the inner garment component (1) from shifting, and ensures the stable performance of the moisture absorption function of the pull-up pants. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the side cross-section structure of the pull-up diaper and the location of the short-cut fabric at the welding point.

[0037] Figure 2 This is a schematic diagram of the structure of the inner waistband nonwoven fabric away from the outer waistband nonwoven fabric.

[0038] Figure 3 This is a schematic diagram of the short-cut fabric position structure and spandex filament distribution at the welding position in Example 1.

[0039] Figure 4 This is a schematic diagram of the short-cut fabric position structure and spandex filament distribution at the welding position in Example 2.

[0040] Figure 5 This is a schematic diagram of the short-cut fabric position structure and spandex filament distribution at the welding position in Example 3. Detailed Implementation

[0041] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0043] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0044] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0045] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0046] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0047] Please also refer to the appendix. Figure 1-5 A type of hot air waist pull-up trousers with welded sections and short-cut fabric of equal layers, comprising an inner component 1, a front elastic waist component 2, and a rear elastic waist component 3.

[0048] The inner component 1 comprises a liquid-permeable top layer 4, a liquid-impermeable anti-leakage layer 5, a liquid-impermeable bottom layer 6, and an absorbent layer 7. The liquid-permeable top layer 4 allows liquid to quickly penetrate to the absorbent layer 7; the liquid-impermeable anti-leakage layer 5 effectively prevents liquid leakage; the liquid-impermeable bottom layer 6 prevents liquid leakage from the absorbent layer 7; and the absorbent layer 7 absorbs and stores liquid, thus achieving the moisture-wicking function of the pull-up trousers.

[0049] The front elastic waist component 2 and the rear elastic waist component 3 are composed of an outer waist nonwoven fabric 8, an inner waist nonwoven fabric 9, and spandex yarn 10 disposed between the inner and outer waist nonwoven fabrics 8 / 9. The outer waist nonwoven fabric 8 and the inner waist nonwoven fabric 9 provide basic structural support for the elastic waist component, and the spandex yarn 10 gives the elastic waist component good elasticity, enabling it to fit the waist of users of different body types and improve wearing comfort.

[0050] Specifically, the outer waistband nonwoven fabric 8 described in this field is a hot-air-process short-fiber carded nonwoven fabric or a spunbond nonwoven fabric. This application mainly uses a hot-air-process short-fiber carded nonwoven fabric. The inner waistband nonwoven fabric 9 is a PP spunbond nonwoven fabric, a PP spunmelt nonwoven fabric, or an EP spunbond nonwoven fabric.

[0051] Specifically, after the front elastic waistband 2 and the rear elastic waistband 3 are folded in half, they are side-welded at the ends to form a closed pant body structure (i.e., a ring-shaped pant leg structure). The side-welding can ensure the firm connection between the front elastic waistband 2 and the rear elastic waistband 3, ensuring that the pant body is not easy to crack during use.

[0052] However, in existing welding implementations, the outer and inner waistband nonwoven fabrics are made of different materials. For example, the hot air nonwoven fabric (outer waistband nonwoven fabric) is made of PET material, while the spunbond nonwoven fabric (inner waistband nonwoven fabric) is made of PP material. The difference in their properties makes it more difficult to melt them during the welding process, which is not conducive to the smooth progress of the welding operation. It is easy to cause problems such as weak welding and cracking, which affects the use of the product.

[0053] This application addresses the aforementioned problems by providing an elastic waistband with high weld strength. Its structural feature is that at least one layer of weld-position chopped fabric 12 is disposed between the outer waistband nonwoven fabric 8 and the inner waistband nonwoven fabric 9. Furthermore, the outer waistband nonwoven fabric 8, particularly the hot-air processed outer waistband nonwoven fabric, is not folded and is not interlaced between the front elastic waistband component 2 and the rear elastic waistband component 3.

[0054] Among them, the short-cut fabric 12 at the welding position and the inner waistband non-woven fabric 9 are both made of PP material, which can increase the number of welding layers between the inner and outer waistband non-woven fabrics 8 and the inner waistband non-woven fabric 9, thereby improving the welding strength. At the same time, the special setting of the outer waistband non-woven fabric 8 can optimize the overall welding structure stability and layer distribution uniformity of the elastic waist component, achieve an equal number of layers design, and further improve wearing comfort and welding strength.

[0055] As a further preferred embodiment, this application also provides the following embodiments: Specifically, at the overlapping seam between the inner waistband nonwoven fabric 9, the welded short-cut fabric 12, and the outer waistband nonwoven fabric 8 (i.e., the outer waistband hot-air nonwoven fabric), a seam welding point with a width of 3.0-8.0 mm is also provided. This seam welding point (heat welding point) further strengthens the connection between the inner waistband nonwoven fabric 9, the welded short-cut fabric 12, and the outer waistband nonwoven fabric 8, preventing delamination at the seam during use. The preferred width range achieves an optimal balance between welding strength and user comfort.

[0056] On the other hand, since the outer waistband nonwoven fabric needs to be folded inward to cover the inner components, in order to ensure the coverage and the integrity of the waistband structure, a wider size of hot-air nonwoven fabric is often required. This undoubtedly increases the raw material cost of the product and reduces the product's market competitiveness.

[0057] As market demands for the quality of pull-up diapers / menstrual pants continue to rise and the need for production cost control becomes increasingly urgent, the problems of traditional hot-air pull-up diapers in terms of welding convenience and cost are becoming more and more prominent. There is an urgent need for a new type of pull-up diaper / menstrual pants structural design that can solve the above problems.

[0058] Specifically, the upper and lower ends of the front elastic waist component 2 and the rear elastic waist component 3 are composed of an outer waist nonwoven fabric 8 and an inner waist nonwoven fabric 9, or an outer waist nonwoven fabric 8, an inner waist nonwoven fabric 9, and a short-cut fabric 12 at the welding position, which are bonded or heat-welded by a hot melt adhesive area 15, and formed by cutting and scrapping waste to form a neat side 13, the side 13 being 4-6mm away from the adjacent spandex filament 14.

[0059] The process of cutting and shaving waste and bonding with hot melt adhesive ensures the neatness of the upper and lower ends of the elastic waistband, preventing burrs from affecting the wearing experience. The distance between the side 13 and the adjacent spandex yarn 14 is limited to prevent the spandex yarn from being excessively exposed or squeezed at the end, ensuring the elasticity of the spandex yarn is stable and does not leak out.

[0060] Specifically, the short-cut fabric 12 at the welding position is PP spunbond nonwoven fabric, PP spunmelt nonwoven fabric, or EP spunbond nonwoven fabric. Among them, PP spunbond nonwoven fabric and PP spunmelt nonwoven fabric both have good softness, skin-friendliness, strength, and welding stability, and can be tightly bonded to the inner and outer waistband nonwoven fabrics 8 / 9 respectively, effectively improving the welding effect. At the same time, the short-cut setting will not increase the overall weight of the pull-up pants, nor will it affect the elasticity of the spandex yarn 10, especially the fine denier spandex yarn, or the breathability of the garment.

[0061] Specifically, the spandex yarn 10 is either 300-940D coarse denier spandex yarn or 40-300D fine denier spandex yarn. Coarse denier spandex yarn has higher elastic recovery and strength, making it suitable for scenarios requiring high elasticity and strong support, while fine denier spandex yarn has better softness and fit, making it suitable for scenarios requiring higher wearing comfort. The two specifications of spandex yarn can be selected according to the different usage needs of the pull-up pants.

[0062] Specifically, the spandex filament 10 is positioned in one of the following three ways: Firstly, spandex yarn is placed between the outer waist nonwoven fabric 8 and the short-cut fabric 12 at the welding position.

[0063] Secondly, the spandex yarn is placed between the short chopped fabric 12 at the welding position and the inner waistband non-woven fabric 9.

[0064] Thirdly, spandex filaments are simultaneously placed between the outer waist nonwoven fabric 8 and the welding position short chopped fabric 12, and between the welding position short chopped fabric 12 and the inner waist nonwoven fabric 9.

[0065] The placement of spandex yarns in various positions can meet different elasticity needs and structural design requirements. When spandex yarns are placed in different positions, the elastic waistband can produce different elastic effects in different areas, thereby better conforming to the user's waist curve and improving the fit and comfort of the garment.

[0066] Specifically, when using fine denier spandex yarn, the upper and lower layers can be arranged with equal gaps, as implemented below: Specifically, one layer of spandex yarn is placed between the outer waist nonwoven fabric 8 and the short-cut fabric 12 at the welding position, while another layer of spandex yarn is placed between the short-cut fabric 12 at the welding position and the inner waist nonwoven fabric 9. The spandex yarns in the two layers of spandex yarn are spaced apart, with a gap of 2.0-5.0 mm between each layer of spandex yarns.

[0067] Specifically, as a more preferred embodiment, the spandex filaments within the two spandex filament layers are staggered.

[0068] The aforementioned spacing arrangement of spandex fibers ensures that the spandex fibers are evenly distributed within the elastic waistband, guaranteeing uniform transmission of elastic force and preventing discomfort caused by excessive or insufficient local elasticity. Limiting the spacing range ensures elasticity while preventing the spandex fibers from being too dense, increasing production costs, or too sparse, affecting elastic performance.

[0069] In addition, fine denier spandex yarns can also be arranged with unequal gaps between upper and lower layers, and can be implemented in the following preferred manner: Specifically, fine denier spandex yarns are simultaneously positioned between the outer waistband nonwoven fabric 8 and the welded short-cut fabric 12, and between the welded short-cut fabric 12 and the inner waistband nonwoven fabric 9.

[0070] The unequal gap setting allows for flexible adjustment of the spandex yarn distribution density according to the elasticity requirements of different areas of the elastic waistband. For example, in areas with more movement on both sides of the waist, the spandex yarn gap can be reduced to enhance elastic support, while in relatively stable areas at the front and back of the waist, the spandex yarn gap can be increased to improve comfort and further optimize the performance of the pull-up pants.

[0071] Furthermore, the inner component 1 is fixed to the front elastic waist component 2 and the rear elastic waist component 3 by a short-cut inner cover fabric 11. The width of the short-cut inner cover fabric 11 is equal to or slightly wider than the width of the inner component. This short-cut inner cover fabric 11 can tightly fix the inner component 1 to the front elastic waist component 2 and the rear elastic waist component 3, preventing the inner component 1 from shifting during use and ensuring the stable operation of the pull-up pants' moisture-wicking function. The width of the short-cut inner cover fabric 11, which matches or is slightly wider than the width of the inner component, ensures that the inner component 1 is completely covered and fixed, avoiding any dead corners in the fixation.

[0072] In addition, the hot air waistband pull-up pants with short-cut fabric at the welding position of this application can also have the outer waistband non-woven fabric (8) folded and extended to cover and fix the inner component 1, or the outer waistband non-woven fabric 8 part folded and extended and the inner waistband non-woven fabric 9 extended to cover and fix the inner component 1.

[0073] To make the technical solution of the present invention clearer and more explicit, the present invention will be further described in detail below with reference to specific embodiments. Example 1

[0074] As attached Figure 1 and 3 As shown, a hot air waist pull-up trousers with a welded section and short-cut fabric of equal layers includes an inner component 1, a front elastic waist component 2, and a rear elastic waist component 3.

[0075] The internal component 1 consists of a liquid-permeable top layer 4, a liquid-impermeable anti-leakage layer 5, a liquid-impermeable bottom layer 6, and an absorbent layer 7. The liquid-permeable top layer 4 is made of hydrophilic non-woven fabric, the liquid-impermeable anti-leakage layer 5 is made of spunbond non-woven fabric, the liquid-impermeable bottom layer 6 is made of PE breathable membrane, and the absorbent layer 7 is made of a mixture of fluff pulp and super absorbent resin or a pre-fabricated absorbent core or other combined absorbent cores.

[0076] The front elastic waist component 2 and the rear elastic waist component 3 are composed of an outer waist nonwoven fabric 8, an inner waist nonwoven fabric 9, and spandex yarn 10 disposed between the inner and outer waist nonwoven fabrics 8 / 9. The outer waist nonwoven fabric 8 is a hot-air nonwoven fabric, and the inner waist nonwoven fabric 9 is a PP spunbond or spunmelt nonwoven fabric. A layer of welded short-cut fabric 12 is disposed between the inner and outer waist nonwoven fabrics 8 / 9. The welded short-cut fabric 12 is a PP spunbond or spunmelt nonwoven fabric. The outer waist nonwoven fabric 8 is not folded and is disposed between the front elastic waist component 2 and the rear elastic waist component 3.

[0077] The front elastic waistband 2 and the back elastic waistband 3 form a closed trouser body structure by folding and side welding. The upper and lower ends of the front elastic waistband 2 and the back elastic waistband 3 are composed of outer waistband non-woven fabric 8, inner waistband non-woven fabric 9 and short-cut fabric 12 at the welding position. The neat side 13 is formed by cutting and scraping, and the distance from the adjacent spandex yarn 14 is 5mm.

[0078] The spandex yarn 10 is made of fine denier spandex yarn with a specification of 105D. It is placed between the outer waist nonwoven fabric 8 and the short-cut fabric 12 at the welding position, and between the short-cut fabric 12 at the welding position and the inner waist nonwoven fabric 9. It is distributed in equal gaps between upper and lower layers, and the gaps L1 and L2 between each layer of spandex yarn are both 4.0mm.

[0079] The inner waist nonwoven fabric 9, the short chopped fabric 12 at the welding position and the outer waist nonwoven fabric 9 have a 6.0mm wide heat welding point at the overlapping seam.

[0080] The inner component 1 is fixed to the front elastic waist component 2 and the rear elastic waist component 3 by a short-cut inner cover fabric 11. The short-cut inner cover fabric 11 is 20mm wider than the inner component 1. The short-cut inner cover fabric 11 is made of PP spunbond or spunmelt nonwoven fabric. Example 2

[0081] As attached Figure 4 As shown, a hot air waistband pull-up trousers with short-cut fabric at the welding position and equal number of layers has a structure that is basically the same as that of Example 2. The difference is that the fine denier spandex filaments are distributed with unequal gaps in the upper and lower layers. The gap between each layer of fine denier spandex filaments is 10, which is sometimes wide and sometimes narrow. However, after the upper and lower layers are overlapped, there is a distribution of fine denier spandex filaments with relatively equal gaps of 1.0-3.5mm L3. Example 3

[0082] like Figure 5 As shown, a hot air waistband pull-up trousers with a welded section and chopped fabric of equal layers has a structure that is basically the same as that of Example 1, except that the spandex yarn 10 is made of 560D coarse denier spandex yarn 10 and is placed together between the outer waistband nonwoven fabric 8 and the welded section chopped fabric 12.

[0083] The above embodiments are only some implementations of the present invention. In actual production, the material, specifications, parameters, etc. of each component can be reasonably adjusted according to specific needs, all of which are within the protection scope of the present invention.

Claims

1. An elastic waist component with a high-strength welded structure, the elastic waist component being composed of an outer waistband nonwoven fabric, an inner waistband nonwoven fabric, and spandex yarn disposed between the two, wherein the end sides of the outer waistband nonwoven fabric and the inner waistband nonwoven fabric are welded together as a single unit, characterized in that: Between the outer waistband nonwoven fabric and the inner waistband nonwoven fabric, or at the outer side of the inner waistband nonwoven fabric away from the outer waistband nonwoven fabric, at the welding area corresponding to the end side welding connection, at least one layer of welding position short-cut fabric is adapted to be provided, such that the outer waistband nonwoven fabric and the inner waistband nonwoven fabric are respectively located on both sides of the welding position short-cut fabric, or the outer waistband nonwoven fabric, the inner waistband nonwoven fabric and the welding position short-cut fabric are arranged side by side in sequence, and the welding position short-cut fabric is connected to the two waistband nonwoven fabrics by welding connection, and the welding structure with high welding strength is constructed by the welding position short-cut fabric.

2. An elastic waistband with a high-strength welded structure, the elastic waistband comprising a front elastic waist component (2) and a rear elastic waist component (3), the front elastic waist component (2) and the rear elastic waist component (3) being welded together at their ends to form a closed annular leg opening structure; each of the elastic waist components is composed of an outer waistband nonwoven fabric (8), an inner waistband nonwoven fabric (9), and spandex yarn (10) disposed between the two, characterized in that: At least one of the elastic waist components is provided with one or more layers of short-cut fabric (12) at the welding area corresponding to the end side welding. The positional structure of the short-cut fabric (12) at the welding position includes: being located between the outer waist nonwoven fabric and the inner waist nonwoven fabric, such that the outer waist nonwoven fabric and the inner waist nonwoven fabric are located on both sides of the short-cut fabric at the welding position; or being located on the outer side of the inner waist nonwoven fabric away from the outer waist nonwoven fabric, such that the outer waist nonwoven fabric, the inner waist nonwoven fabric and the short-cut fabric at the welding position are arranged sideways in sequence; When the front elastic waist component (2) and the rear elastic waist component (3) are connected by end-side welding, the short-cut fabric (12) at the welding position is welded to the adjacent waist non-woven fabric to form a whole, and the elastic waist with high welding strength is constructed by the short-cut fabric at the welding position.

3. The elastic waistband with a high-weld-strength welded structure according to claim 2, characterized in that: The location structure includes: The short-cut fabric (12) at the welding position is located between the outer waist nonwoven fabric and the inner waist nonwoven fabric of the front elastic waist component (2), or at the outer side of the inner waist nonwoven fabric away from the outer waist nonwoven fabric. Or / and, the welded short-cut fabric (12) is located between the outer waist nonwoven fabric and the inner waist nonwoven fabric of the rear elastic waist component (3), or at a position on the outer side of the inner waist nonwoven fabric away from the outer waist nonwoven fabric.

4. The elastic waistband with a high-weld-strength welded structure according to claim 2, characterized in that: Both the front elastic waist component and the rear elastic waist component have short-cut fabrics at the welding positions adapted between the outer waist nonwoven fabric and the inner waist nonwoven fabric, so that the front elastic waist component and the rear elastic waist component have an equal number of layers.

5. The elastic waistband with a high-weld-strength welded structure according to claim 2, characterized in that: Between the front elastic waist component (2) and the rear elastic waist component (3), at least one layer of welded short-cut fabric (12) is also adapted to be provided in the welding area corresponding to the end side welding, so that the front elastic waist component (2) and the rear elastic waist component (3) are located on both sides of the welded short-cut fabric.

6. The elastic waistband with a high-weld-strength welded structure according to any one of claims 2-5, characterized in that: The outer waistband nonwoven fabric (8) is not folded and is not inserted between the front elastic waist component (2) and the rear elastic waist component (3).

7. The elastic waistband with a high-weld-strength welded structure according to claim 6, characterized in that: By slitting and removing waste, the end sides of the front elastic waist component (2) and the rear elastic waist component (3) are formed into neat side edges (13), and the distance between the side edge and the closest spandex filament (14) is 1-10mm.

8. The elastic waistband with a high-strength welded structure according to any one of claims 2-5 and 7, characterized in that: The short-cut fabric (12) at the welding position is PP spunbond nonwoven fabric or PP spunmelt nonwoven fabric.

9. The elastic waistband with a high-weld-strength welded structure according to claim 2, characterized in that: The spandex yarn (10) is selected from coarse denier spandex yarn with a specification of 300-940D or fine denier spandex yarn with a specification of 40-300D.

10. The elastic waistband with a high-weld-strength welded structure according to claim 9, characterized in that: The spandex filament (10) is located between the outer waist nonwoven fabric (8) and the short-cut fabric (12) at the welding position, or between the short-cut fabric (12) at the welding position and the inner waist nonwoven fabric (9), or between the outer waist nonwoven fabric (8) and the inner waist nonwoven fabric (9).

11. The elastic waistband with a high-weld-strength welded structure according to claim 9, characterized in that: The spandex filament (10) is simultaneously located between the outer waist nonwoven fabric (8) and the short-cut fabric (12) at the welding position, and between the short-cut fabric (12) at the welding position and the inner waist nonwoven fabric (9), thereby forming an outer spandex filament layer and an inner spandex filament layer, respectively.

12. The elastic waistband with a high-weld-strength welded structure according to any one of claims 9-11, characterized in that: The spandex filament is made of fine denier spandex filament (10), and the spandex filaments in both spandex filament layers are distributed with equal spacing, and the gap between two adjacent spandex filaments (10) is 1.5-7.0 mm.

13. The elastic waistband with a high-weld-strength welded structure according to any one of claims 9-11, characterized in that: The spandex filament is made of fine denier spandex filament (10), and the gap between the spandex filaments in the outer spandex filament layer and the gap between the spandex filaments in the inner spandex filament layer are unequal.

14. A pull-up trouser, comprising an inner component (1) and an elastic waistband, the elastic waistband being composed of a front elastic waistband component (2) and a rear elastic waistband component (3), the inner component (1) being composed of a liquid-permeable top layer (4), a liquid-impermeable anti-leakage layer (5), a liquid-impermeable bottom layer (6), and an absorbent layer (7), characterized in that: The elastic waistband is an elastic waistband with a high-strength welded structure as described in any one of claims 2-13.

15. The pull-up pants according to claim 14, characterized in that: It also includes a short-cut inner covering fabric (11), and the inner component (1) is fixedly connected to the front elastic waist component (2) and the rear elastic waist component (3) respectively through the short-cut inner covering fabric (11).

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