High-elasticity water-absorbing disposable underpants

By designing high elastic water-absorbing disposable underwear, using composite elastic cloth and water-absorbing layer, the problem of disposable underwear not being close to the body and being prone to leakage is solved, improving the comfort of wearing and effectively absorbing body fluids to prevent leakage.

WO2025060305A1PCT designated stage expired Publication Date: 2025-03-27JIANGSU ZHONGFANG JUYOU TECHNOLOGY CO LTD
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Patent Information

Application Number
PCT/CN2023/143417
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-18
Filing Date
2023-12-29
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Due to the thin material and loose fit, disposable underwear are prone to lateral leakage or crotch leakage during special periods such as excessive secretions, leakage of urine or menstruation. The design of the disposable underwear will cause inconvenience and embarrassment.

Method used

A high elastic water-absorbing disposable underwear is designed, using a three-layer composite elastic cloth, including non-woven fabric and elastic membrane, with a water-absorbing layer and a skin-friendly layer on the crotch, and an inelastic connection part and elastic components at the waist on both sides to ensure that the underwear is still comfortable and does not slide easily when tight.

Benefits of technology

By optimizing the fabric and structural design of underwear, the problem of disposable underwear not being close to the body and being prone to leakage is solved, which improves the comfort of wearing, and effectively absorbs excess body fluids in special periods to prevent leakage.

✦ Generated by Eureka AI based on patent content.

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    Figure CN2023143417_27032025_PF_FP_ABST
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Abstract

High-elasticity water-absorbing disposable underpants, comprising an underpants body composed of composite elastic cloth. Non-elastic connecting portions are arranged on two sides of the underpants body; an elastic assembly having a certain width is arranged at the upper end of the underpants body; a water absorbing layer and a skin-friendly layer are fixedly connected to a crotch portion of the underpants body and the composite elastic cloth; the composite elastic cloth is of a three-layer structure; the inner layer and the outer layer are non-woven fabrics, and the interlayer is an elastic film; the skin-friendly layer is one or more of a spunlace non-woven fabric, a plant fiber non-woven fabric, a hot air non-woven fabric, a wood pulp spunlace non-woven fabric, a needled non-woven fabric, a degradable non-woven fabric, a spunbonded non-woven fabric, and a hot-rolled non-woven fabric. According to the high-elasticity water-absorbing disposable underpants, a water absorbing material is arranged at the crotch portion; additionally, a skin-friendly elastic material having good coating performance is used in combination with the elastic assembly and the connecting portions arranged on the side edges, so that a user can obtain good coating performance when wearing the disposable underpants during periods, and leakage is not prone to occurring.
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Description

Highly elastic water-absorbent disposable underwear Technical Field

[0001] The utility model relates to the technical field of underwear, in particular to a pair of high-elasticity water-absorbing disposable underwear. Background Art

[0002] Because disposable underwear is single-use, the materials used are generally thin and lightweight, not skin-friendly. The underwear is also loose-fitting, making the uneven shape of the underwear visible when worn over tight pants, which is very awkward. During periods like heavy secretions, urinary inconvenience, and menstruation, loose or thin fabrics often cause leakage from the sides or crotch. Because disposable underwear is disposable, users are more likely to use it during periods of high underwear contamination, resulting in the inconvenience of side leakage.

[0003] Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a high-elasticity water-absorbent disposable underwear.

[0005] To achieve the above-mentioned object, the main technical solution of the present invention is to provide a highly elastic water-absorbent disposable underwear, comprising an underwear body made of a composite elastic fabric, with inelastic connecting portions provided on both sides of the underwear body, an elastic component of a certain width provided on the upper end of the underwear body, and a water-absorbent layer and a skin-friendly layer fixedly connected to the composite elastic fabric at the crotch portion of the underwear body;

[0006] The composite elastic fabric has a three-layer structure, with the inner and outer layers being non-woven fabrics and the interlayer being an elastic film;

[0007] The skin-friendly layer is made of one or more of spunlace nonwoven fabrics, plant fiber nonwoven fabrics, hot air nonwoven fabrics, wood pulp spunlace nonwoven fabrics, needle-punched nonwoven fabrics, degradable nonwoven fabrics, spunbond nonwoven fabrics, and heat-bonded nonwoven fabrics.

[0008] By optimizing the underwear fabric and selecting a three-layer elastic fabric, the present invention achieves the low-cost benefits of disposable underwear while maintaining elasticity and skin-friendliness, ensuring a comfortable fit even when tight. The underwear body is fitted with inelastic connectors on both sides. The inelastic material is less tightly wrapped than elastic, allowing for a comfortable fit and preventing constriction. The elastic waistband is designed to be wide and non-constricting, ensuring the underwear remains comfortable and does not slide down. The crotch section features a two-layer design with absorbent material added between the layers, preventing fluid leakage that can occur with thin fabric. The crotch layer is constructed from a highly skin-friendly, breathable, and non-woven fabric, allowing fluids to quickly penetrate the absorbent layer and be absorbed, keeping the crotch section breathable and dry. The overall design is ideal for special occasion wear, preventing the awkwardness of wearing tight outerwear due to poor fit. It also helps absorb excess fluids during special occasions, preventing the risk of leaks from thin, disposable underwear.

[0009] Preferably, the water-absorbing layer comprises a plant fiber non-woven fabric fixedly connected to the underwear body, and a polymer water-absorbing resin layer filled between the plant fiber non-woven fabric and the underwear body.

[0010] The plant fiber non-woven fabric is highly hydrophobic, which is conducive to the infiltration of body fluids. The polymer absorbent resin layer material is environmentally friendly and skin-friendly, low in cost, and has good water absorption effect.

[0011] Preferably, the plant fiber non-woven fabric is connected to three sides of the underwear body and is provided with an opening through which the polymer water-absorbing resin layer can be added, replaced or removed.

[0012] The polymer water-absorbing resin layer can be stacked or removed according to different needs of users, and the polymer water-absorbing resin layer with different functions can also be replaced according to needs.

[0013] Preferably, the polymer water-absorbing resin includes activated carbon, polysaccharide, tea polyphenols, deodorant, polylactic acid and functional admixture.

[0014] Among the functional mixed herbs, you can choose motherwort which helps relieve dysmenorrhea in women, mint which can increase the cooling feeling in summer, etc.

[0015] Preferably, the outer side of the elastic component is the elastic cloth, the inner side of the elastic component is provided with spandex yarn, and the gap between the elastic cloth and the spandex yarn is filled with a hot melt adhesive film.

[0016] The materials used for the elastic components are skin-friendly and highly elastic while also being low-cost, making them suitable for use in single-disposal products such as disposable underwear.

[0017] Preferably, the leg portion of the underwear body is provided with a hem to prevent leakage.

[0018] The hem around the legs further prevents circumferential leakage.

[0019] The beneficial effects provided by the utility model are:

[0020] 1) By designing the main material of underwear that is skin-friendly, close-fitting, and low-cost, the disadvantages of disposable underwear that are not close-fitting and prone to leakage are solved;

[0021] 2) The non-elastic connecting edges on both sides and the upper elastic component effectively alleviate the problem of underwear being too tight and improve wearing comfort;

[0022] 3) The replaceable absorbent layer can effectively absorb excess liquid when the flow rate is low, preventing the embarrassing leakage of liquid caused by the thin disposable underwear;

[0023] 4) The medicine mixed in the water-absorbing layer can achieve different functions such as relieving menstrual pain and increasing cooling sensation according to needs, giving users a better wearing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is an overall view of the high elasticity water-absorbent disposable underwear in Example 1 of the present invention.

[0025] FIG2 is a flat-lay view of the high-elasticity water-absorbent disposable underwear in Example 1 of the present utility model.

[0026] FIG3 is a detailed diagram of the elastic component in Example 1 of the present invention.

[0027] FIG4 is an enlarged view of area A in FIG3 .

[0028] FIG5 is an enlarged view of area B in FIG3 .

[0029] In the figure, 101 is a composite elastic fabric, 1011 is a non-woven fabric, 1012 is an elastic film, 102 is a connecting portion, 103 is an elastic component, 1041 is a skin-friendly layer, 1042 is a water-absorbing layer, 105 is a hot-melt adhesive film, 106 is a spandex yarn, and 107 is an edge binding. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0031] Example 1

[0032] As shown in Figures 1-2, a highly elastic, water-absorbent disposable underwear comprises an underwear body formed of a composite elastic cloth 101, with inelastic connecting portions 102 provided on both sides of the underwear body, an elastic component 103 of a certain width provided on the upper end of the underwear body, and a water-absorbing layer 1042 and a skin-friendly layer 1041 fixedly connected to the composite elastic cloth 101 at the crotch portion of the underwear body; the composite elastic cloth 101 is a three-layer structure, with the inner and outer layers being non-woven fabrics 1011, and the interlayer being an elastic film 1012; the skin-friendly layer 1041 is made of one or more of spunlace non-woven fabrics, plant fiber non-woven fabrics, hot air non-woven fabrics, wood pulp spunlace non-woven fabrics, needle-punched non-woven fabrics, degradable non-woven fabrics, spunbond non-woven fabrics, and hot-bonded non-woven fabrics.

[0033] The leg area of ​​the underwear body is provided with a hem 107 to prevent leakage. The absorbent layer 1042 comprises a plant fiber nonwoven fabric fixedly connected to the underwear body, and a polymer absorbent resin layer filled between the plant fiber nonwoven fabric and the underwear body. The plant fiber nonwoven fabric is connected to the underwear body on three sides and has an opening through which the polymer absorbent resin layer can be added, replaced, or removed. The polymer absorbent resin includes activated carbon, polysaccharides, tea polyphenols, deodorants, polylactic acid, and functional admixtures. As shown in Figures 3-5, the elastic component 103 is provided with the elastic fabric 101 on the outside, and the elastic component 103 is provided with spandex yarn 106 on the inside. The space between the elastic fabric 101 and the spandex yarn 106 is filled with a hot melt adhesive film 105.

[0034] By optimizing the underwear fabric and selecting a three-layer elastic fabric, the present invention achieves the low-cost benefits of disposable underwear while maintaining elasticity and skin-friendliness, ensuring a comfortable fit even when tight. The underwear body is fitted with inelastic connectors on both sides. The inelastic material is less tightly wrapped than elastic, allowing for a comfortable fit and preventing constriction. The elastic waistband is designed to be wide and non-constricting, ensuring the underwear remains comfortable and does not slide down. The crotch section features a two-layer design with absorbent material added between the layers, preventing fluid leakage that can occur with thin fabric. The crotch layer is constructed from a highly skin-friendly, breathable, and non-woven fabric, allowing fluids to quickly penetrate the absorbent layer and be absorbed, keeping the crotch section breathable and dry. The overall design is ideal for special occasion wear, preventing the awkwardness of wearing tight outerwear due to poor fit. It also helps absorb excess fluids during special occasions, preventing the risk of leaks from thin, disposable underwear. The plant fiber nonwoven fabric is highly hydrophobic, facilitating the infiltration of bodily fluids. The polymer absorbent resin layer is eco-friendly, skin-friendly, cost-effective, and highly absorbent. The polymer absorbent resin layer can be added or removed to suit user needs, and can also be replaced with different functional herbal remedies. These functional herbal remedies include motherwort for relieving menstrual cramps and peppermint for a cooling effect in summer. The elastic component is also skin-friendly and highly elastic, yet low-cost, making it suitable for single-use products like disposable underwear.

[0035] The beneficial effects provided by the utility model are:

[0036] 1) By designing the main material of underwear that is skin-friendly, close-fitting, and low-cost, the disadvantages of disposable underwear that are not close-fitting and prone to leakage are solved;

[0037] 2) The non-elastic connecting edges on both sides and the upper elastic component effectively alleviate the problem of underwear being too tight and improve wearing comfort;

[0038] 3) The replaceable absorbent layer can effectively absorb excess liquid when the flow rate is low, preventing the embarrassing leakage of liquid caused by the thin disposable underwear;

[0039] 4) The medicine mixed in the water-absorbing layer can achieve different functions such as relieving menstrual pain and increasing cooling sensation according to needs, giving users a better wearing experience.

[0040] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any product with the same or similar technical solutions as the present application falls within the scope of protection of the present invention.

Claims

1. A highly elastic water-absorbent disposable underwear, characterized in that: The invention comprises an underpants body made of a composite elastic cloth (101), wherein inelastic connecting parts (102) are arranged on both sides of the underpants body, an elastic component (103) of a certain width is arranged on the upper end of the underpants body, and a water-absorbing layer (1042) and a skin-friendly layer (1041) are fixedly connected to the composite elastic cloth (101) at the crotch of the underpants body; The composite elastic fabric (101) is a three-layer structure, wherein the inner and outer layers are non-woven fabrics (1011), and the interlayer is an elastic film (1012); The skin-friendly layer (1041) is made of one or more of spunlace nonwoven fabrics, plant fiber nonwoven fabrics, hot air nonwoven fabrics, wood pulp spunlace nonwoven fabrics, needle-punched nonwoven fabrics, degradable nonwoven fabrics, spunbond nonwoven fabrics, and heat-bonded nonwoven fabrics.

2. A highly elastic water-absorbent disposable underpants as claimed in claim 1, characterized in that: The water-absorbing layer (1042) comprises a plant fiber non-woven fabric fixedly connected to the underwear body, and a polymer water-absorbing resin layer filled between the plant fiber non-woven fabric and the underwear body.

3. A highly elastic water-absorbent disposable underpants as claimed in claim 2, characterized in that: The plant fiber nonwoven fabric is connected to three sides of the underwear body and is provided with an opening, through which the polymer water-absorbing resin layer can be added, replaced or removed.

4. The highly elastic water-absorbent disposable underwear according to claim 2, characterized in that: The polymer water-absorbing resin comprises activated carbon, polysaccharide, tea polyphenols, deodorant, polylactic acid and functional admixture.

5. The highly elastic water-absorbent disposable underwear according to claim 1, characterized in that: The elastic cloth (101) is disposed on the outside of the elastic component (103), spandex yarn (106) is disposed on the inside of the elastic component (103), and a hot melt adhesive film (105) is filled in the gap between the elastic cloth (101) and the spandex yarn (106).

6. The highly elastic water-absorbent disposable underwear according to claim 1, characterized in that: The leg circumference of the underwear body is provided with a hem (107) to prevent leakage.

Citation Information

Patent Citations

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    CN111134967A

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    CN215152536U

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