Elastic sheet having elastic gradient difference for disposable underpants

Abstract

The utility model relates to an elastic sheet with elastic gradient difference for disposable underpants, which comprises a first non-woven fabric layer with a pleat structure, a second non-woven fabric layer with a pleat structure, and a spandex yarn layer which is positioned between the first non-woven fabric layer and the second non-woven fabric layer and is formed by arranging a plurality of spandex yarns at intervals along the breadth direction of the non-woven fabric layers, the elasticity of all the spandex filaments is gradually reduced from the top side of the non-woven fabric layer, so that the elastic sheet has an elastic gradient difference in the breadth direction, and the elastic gradient difference is 0.5%-10%; the top side of the first non-woven fabric layer and the top side of the second non-woven fabric layer are integrally connected, and a bubble-shaped tightening-mark-free skin care part is arranged at the integral connecting position.

Description

Technical Field

[0001] The utility model belongs to the technical field of sanitary materials, and in particular relates to an elastic sheet material with an elastic gradient difference for disposable underwear. Background Art

[0002] Disposable underwear is a disposable absorbent product that has the shape of underwear and is comfortable and breathable. For example, it is a triangle underwear made of non-woven fabric, that is, the front waist (front piece) and the back waist (back piece) are made of non-elastic non-woven fabric, but elastic bands are provided at the waist and leg openings.

[0003] In response to the problems existing in existing disposable underwear, the prior art with publication number CN219845075U discloses a disposable underwear, comprising a front waist portion, a rear waist portion and a crotch portion, wherein a front waist elastic layer is provided on the inner side of the front waist portion, and a rear waist elastic layer is provided on the inner side of the rear waist portion. The front waist elastic layer and the rear waist elastic layer are both wrinkled, and the left and right ends of the two are respectively connected, so that the front waist portion and the rear waist portion are both elastic, so that the underwear is more close-fitting when worn. In addition, the front waist elastic layer and the rear waist elastic layer are both wrinkled, which are relatively soft and can improve wearing comfort.

[0004] However, although the prior art makes the underwear fit closer to the body by providing an elastic waist layer, this elastic waist layer without an elastic gradient is too close to the body and affects the comfort of dynamic elastic adjustment. In fact, the wearing comfort experience is poor. Because for the elastic waist layer, in addition to the elastic belt located at the top opening of the underwear to restrain or fix the underwear, the elastic part located under the elastic layer should not only have the function of fitting the body, but also have the function of dynamic adjustment and comfort, without a sense of tightness or restraint. Only in this way can the underwear have a better wearing comfort and experience. Utility Model Content

[0005] In order to solve the problem that the elastic sheets used in existing disposable underwear do not have an elastic gradient difference, resulting in an unpleasant experience of tightness and restraint in the use of disposable underwear, this application provides an elastic sheet with an elastic gradient difference to meet the high-end needs of consumers.

[0006] This utility model is achieved through the following technical solution: an elastic sheet with a gradient elasticity for disposable underwear, comprising a first non-woven fabric layer and a second non-woven fabric layer with a pleated structure, and a spandex layer located between the first and second non-woven fabric layers, formed by a plurality of spandex yarns spaced apart across the width of the non-woven fabric layers. The structural characteristic is that the elasticity of all the spandex yarns in the spandex layer gradually decreases from the top to the bottom of the non-woven fabric layer, resulting in an elastic gradient across the width of the elastic sheet, the elastic gradient being 0.5%-10%. Furthermore, the first and second non-woven fabric layers are integrally connected at the top, with a bubble-shaped, non-marking skin-protecting portion provided at the integral connection.

[0007] Preferably, the non-woven fabric is extended a certain length at the top side in a direction away from the spandex yarn located at the top side, and then folded over to form the integral connection, and compositely connected with the spandex yarn layer to form the non-marking skin care portion at the integral connection. The size is 0.5-35 mm.

[0008] Preferably, the elastic force gradient difference is 3%-6%. In some embodiments, the elastic force gradient difference is an equidistant gradient difference, but in other embodiments, the elastic force gradient difference is a non-equidistant gradient difference.

[0009] In a specific embodiment, the elastic force gradient difference is a stretching ratio gradient difference, and the stretching ratio gradient difference is 1%, 2%, 4%, 5% or 6%. Wherein, the stretching ratio of the spandex yarn is 1.1-6.0.

[0010] Preferably, the non-woven fabric layer is selected from spunbond non-woven fabric, bicomponent non-woven fabric, and hot air non-woven fabric.

[0011] Preferably, the spandex yarn is a spandex yarn with a denier of 10-2000.

[0012] Beneficial technical effects of the utility model:

[0013] Compared with the prior art, the elastic sheet of the present application is provided with an elastic gradient difference, and the elastic force of the spandex yarn gradually decreases from the top side of the non-woven fabric layer (located at the top opening position when in use) to the bottom side (located at the bottom position when in use), so that the elastic sheet has an elastic gradient difference in the width direction, so that the elastic sheet has different dynamic adjustment performance in its width direction.

[0014] The disposable underwear using the elastic sheet of the present application not only has a good wearing restraint or fixation effect on the human waist, but also has a dynamic adjustment and comfortable experience without a tight and restraining feeling, further improving the comfortable experience and meeting the needs of high-end consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of an elastic sheet with an elastic gradient difference.

[0016] Figure 2 Yes Figure 1 Schematic diagram of the structure viewed along NN.

[0017] Figure 3 Schematic diagram of disposable underwear containing elastic sheet with elastic gradient difference. DETAILED DESCRIPTION

[0018] 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 preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] In the claims, description and drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is for the purpose of distinguishing different objects rather than for describing a specific order.

[0020] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise expressly defined, directional words such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention.

[0021] In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0022] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0023] Please also refer to the attached Figure 1-3. In order to solve the problem that the elastic sheets used in existing disposable underwear do not have an elastic gradient difference, resulting in an unpleasant experience of tightness and restraint in the use of disposable underwear, this application provides an elastic sheet with an elastic gradient difference to meet the high-end needs of consumers.

[0024] The present invention is implemented through the following implementation methods:

[0025] Specifically, the disposable underwear uses an elastic sheet with an elastic gradient difference, which includes a first non-woven fabric layer 11 with a pleated structure, a second non-woven fabric layer 12, and a spandex yarn layer located therebetween, which is composed of a plurality of spandex yarns spaced apart along the width direction of the non-woven fabric layer.

[0026] Among them, the pleated structure consists of a peak portion and a trough portion connecting the peak portion, and the peak portion and the trough portion extend alternately in sequence along the longitudinal direction of the non-woven fabric layer; along the transverse direction of the width of the non-woven fabric layer, a plurality of spandex yarns are arranged on the non-woven fabric layer at intervals of 0.5-6 mm, and the two ends of each spandex yarn are spread parallel to the longitudinal direction of the non-woven fabric layer to form the elastic layer, and the spandex yarn is connected to the trough portion by an adhesive layer, so that the elastic sheet has stretch recovery in its longitudinal direction.

[0027] Specifically, the non-woven fabric layer is selected from spunbond non-woven fabric, bicomponent non-woven fabric, and air-through non-woven fabric.

[0028] Specifically, the spandex yarn is a spandex yarn with a denier of 10-2000.

[0029] Specifically, the structural feature of this utility model is that the elasticity of all the spandex yarns within the non-woven fabric layer gradually decreases from the top side of the non-woven fabric layer (relative to disposable underwear, the top side is the top opening relative to the waist position) to the bottom side (below the top side during use), resulting in an elastic gradient difference in the width of the elastic sheet, with the elastic gradient difference ranging from 0.5% to 10%. Furthermore, the first and second non-woven fabric layers are integrally connected at the top side, and a bubble-shaped skin-protecting portion is provided at this integral connection to prevent marks.

[0030] In a specific embodiment, the elastic force gradient of the elastic sheet is achieved by gradually decreasing the elastic force from spandex yarn 20, spandex yarn 21, spandex yarn 22, spandex yarn 23, spandex yarn 24, spandex yarn 25, spandex yarn 26, spandex yarn 27, spandex yarn 28 to spandex yarn 29, thereby forming an elastic force gradient difference between the spandex yarns. The elastic force gradient difference is 0.5%-10%. In a specific embodiment, the elastic force gradient difference can further preferably be 3%-6%.

[0031] However, in some embodiments, the elastic force gradient difference is an equidistant gradient difference, that is, an equal percentage gradient difference, but in other embodiments, the elastic force gradient difference is a non-equidistant gradient difference.

[0032] In a specific embodiment, the stretching ratio of the spandex yarn is 1.1-6.0, and the elastic gradient difference is the stretching ratio gradient difference, and the stretching ratio gradient difference is 1%, 2%, 4%, 5% or 6%, such as:

[0033] The stretching ratios of spandex yarn 20, spandex yarn 21, spandex yarn 22, spandex yarn 23, spandex yarn 24, spandex yarn 25, spandex yarn 26, spandex yarn 27, spandex yarn 28 to spandex yarn 29 are sequentially 1.55, 1.50, 1.45, 1.40, 1.35, 1.30, 1.25, 1.20, 1.15, and 1.10, with the stretching ratios being 5% as an arithmetic gradient. The above method is employed when the arithmetic gradient is 1%, 2%, 4%, or 6%. Of course, other arithmetic gradients can also be employed.

[0034] In a specific embodiment, the bubble-shaped non-marking skin care part is realized by the following method:

[0035] Specifically, a non-woven fabric is extended a certain length at the top side in a direction away from the spandex yarn located at the top side, and then folded integrally to form the integral connection, and compositely connected with the spandex yarn layer to form the non-marking skin care portion at the integral connection. The size is 0.5-35 mm.

[0036] Through the above implementation methods, an elastic sheet with an elastic gradient difference is formed in the present application. The elastic force of the spandex yarn gradually decreases from the top side to the bottom side of the non-woven fabric layer, so that the elastic sheet has an elastic gradient difference in the width direction, so that the elastic sheet has different dynamic adjustment performance in its width direction.

[0037] Based on the above embodiments, the present application further provides a schematic diagram of a disposable underpants comprising an elastic sheet material with a gradient elasticity difference. The disposable underpants comprise an underpants body 4, on which is disposed an elastic sheet material with a gradient elasticity difference according to the present application, comprising a front elastic sheet and a back elastic sheet, which are welded together at the side waist region.

[0038] The disposable underwear using the elastic sheet of the present application not only has a good wearing restraint or fixation effect on the human waist, but also has a dynamic adjustment and comfortable experience without a tight and restraining feeling, further improving the comfortable experience and meeting the needs of high-end consumers.

[0039] Comparative sample: L-type disposable underwear was purchased from commercial products, and the disposable underwear was provided with an elastic layer at the waist, as shown in the prior art CN219845075U.

[0040] Test Sample: First, prepare the elastic sheet material with a gradient elasticity, including a front elastic sheet and a back elastic sheet. Then, remove the waist elastic layer from a commercially available disposable underwear. This removal method is familiar to those skilled in the art.

[0041] Finally, the front elastic sheet and the back elastic sheet are welded and connected into one piece at the side waist position.

[0042] The denier, number, and spacing of the spandex yarns within the elastic sheet, as well as the type, weight, and sizing of the nonwoven fabric, are consistent with the data obtained from the waist elastic layer. The stretch ratio is set at a 5% arithmetic gradient. Similarly, these reference values obtained from existing competitive products are known to those skilled in the art.

[0043] Performance test: Evaluation method for the overall dynamic adjustment and comfort of the product: 5 people were used as test subjects, and manual evaluation was conducted through wearing experience. The overall experience evaluation results are as follows: excellent > better > good > average > uncomfortable.

[0044] Test results:

[0045]

[0046] Compared with the control sample, the disposable underwear using the elastic sheet of the present application not only has a good wearing restraint or fixation effect on the human waist, but also has a dynamic adjustment and comfortable experience without a tight or restraining feeling. It has an excellent comfortable experience and meets the needs of high-end consumers.

[0047] The foregoing description shows and describes preferred embodiments of the present invention. As previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the present invention as taught herein or through the techniques or knowledge of the relevant art. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. An elastic sheet material with an elastic gradient for disposable underwear, the elastic sheet material comprising a first nonwoven fabric layer and a second nonwoven fabric layer having a pleated structure, and a spandex yarn layer located therebetween and composed of a plurality of spandex yarns spaced apart along the width direction of the nonwoven fabric layer, characterized in that: In the spandex yarn layer, the elasticity of all the spandex yarns gradually decreases from the top side of the non-woven fabric layer, so that the elastic sheet has an elasticity gradient difference in the width direction, and the elasticity gradient difference is 0.5%-10%; The first non-woven fabric layer and the second non-woven fabric layer are integrally connected at the top side, and a bubble-shaped, mark-free skin care portion is provided at the integral connection.

2. The elastic sheet with elastic gradient for disposable underwear according to claim 1, characterized in that: The non-woven fabric is extended to a certain size at the top side in the direction away from the spandex yarn at the top side, and then folded as a whole to form the integral connection, and compositely connected with the spandex yarn layer to form the non-marking skin care part at the integral connection.

3. The elastic sheet with elastic gradient for disposable underwear according to claim 2, characterized in that: The size is 0.5-35 mm.

4. The elastic sheet with elastic gradient for disposable underwear according to claim 1, characterized in that: The elastic force gradient difference is 1%-6%.

5. The elastic sheet with elastic gradient for disposable underwear according to claim 4, characterized in that: The elastic force gradient difference is an equidistant gradient difference.

6. The elastic sheet material with elastic gradient for disposable underwear according to claim 4, characterized in that: The elastic force gradient difference is a non-equidistant gradient difference.

7. The elastic sheet with elastic gradient for disposable underwear according to any one of claims 4 to 6, characterized in that: The elastic force gradient difference is the stretching ratio gradient difference.

8. The elastic sheet with elastic gradient for disposable underwear according to claim 7, characterized in that: The stretching ratio gradient difference is 1%, 2%, 4%, 5% or 6%.

9. The elastic sheet with elastic gradient for disposable underwear according to any one of claims 1 to 6 and 8, characterized in that: The non-woven fabric layer is selected from spunbond non-woven fabric, bicomponent non-woven fabric, and hot air non-woven fabric.

10. The elastic sheet with elastic gradient for disposable underwear according to any one of claims 1-6 and 8, characterized in that: The spandex yarn is a spandex yarn with a density of 10-2000 denier.

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