High-fitness disposable non-woven fabric underpants

Abstract

The utility model provides high-fitness disposable non-woven fabric underpants, which belong to the technical field of hygienic products and comprise an underpants body, and the underpants body comprises a first base layer, a second base layer and an elastic layer arranged between the first base layer and the second base layer. The crotch absorber is arranged at the crotch of the underpants body; the waist rubber band is arranged on the waist of the underpants body and used for enabling the underpants body to be stably attached to the waist; the regularly arranged main body spandex filaments can provide constraint for the waist and buttocks of a human body, and the problems that knitted underpants are insufficient in buttock fitting degree, uneven in stress and the like are solved; the waist position is composed of a plurality of thicker spandex filaments, and the stretching ratio of the uppermost waist spandex filament is increased, so that the constraining force of the waist can be kept when a human body moves, and the problem that the waist curls downwards and falls down is solved.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products technology, specifically to a highly conforming disposable non-woven underwear. Background Technology

[0002] Most knitted underwear on the market uses elastic bands at the waist and legs to provide basic support and fixation. However, this traditional design has several problems and shortcomings. First, it doesn't fit the buttocks well enough. The elastic bands in traditional knitted underwear are mainly concentrated at the waist and legs, lacking effective support in the buttocks area. This results in gaps between the underwear and the buttocks, affecting fit and comfort. It also tends to shift during exercise, and the waistband is prone to rolling up and sagging, restricting freedom of movement. Second, it causes uneven pressure. The elastic bands in traditional knitted underwear can easily create localized pressure on the body, leading to poor blood circulation, discomfort such as marks and itching, and even friction against the skin, damaging the skin barrier. Utility Model Content

[0003] This invention provides a highly conforming disposable non-woven underwear to solve the technical problem in the prior art where insufficient fit to the buttocks leads to easy displacement and curling of disposable underwear.

[0004] To solve the above problems, the highly conforming disposable non-woven underwear provided by this utility model adopts the following technical solution: it includes an underwear body, which includes a first base layer, a second base layer, and an elastic layer disposed between the first base layer and the second base layer;

[0005] The crotch absorber is located in the crotch area of ​​the underwear body;

[0006] The elastic waistband is located at the waist of the underwear body and is used to make the underwear body fit the waist stably.

[0007] Both the first and second base layers are non-woven fabric layers, and the basis weight of both the first and second base layers ranges from 10gsm to 18gsm; the elastic layer includes several main spandex filaments, the fineness of which ranges from 105D to 150D, and the spacing between each main spandex filament is 2mm; the elongation ratio of the main spandex filaments is 2.2 times to 2.7 times.

[0008] The waist elastic band includes a waist non-woven fabric and several waist spandex filaments. The waist spandex filaments have a fineness of 720D, a spacing of 5mm, and a stretch ratio of 2.4 to 2.8 times.

[0009] As a further improvement, the basis weight range of both the first and second base layers is 10 gsm to 14 gsm.

[0010] As a further improvement, the main spandex filament has a fineness of 140D and a draw ratio of 2.4 times.

[0011] As a further improvement, the elongation ratio of the spandex yarn at the waist is 2.6 times.

[0012] As a further improvement, the waist nonwoven fabric has four layers.

[0013] As a further improvement, the crotch absorber is made of hot-air composite pure cotton knitted fabric.

[0014] As a further improvement, the weight range of the crotch absorbent body is 90 gsm to 120 gsm.

[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0016] 1. The main spandex yarn arranged in a regular pattern in this utility model can provide restraint for the waist and hips of the human body, overcoming the problems of insufficient fit and uneven force distribution of knitted underwear.

[0017] 2. The waist section of this utility model is composed of multiple thicker spandex filaments. The spandex filament at the top of the waist has a higher stretch ratio, which can maintain the restraint of the waist during human movement and prevent the waist from rolling down or sagging.

[0018] 3. This utility model provides a more fitting, comfortable, and evenly stressed disposable non-woven underwear. By detecting the changes in thickness and internal pressure of the elastic laminate under different stretching states, the ergonomic stress range is calculated to verify the underwear's fit, reducing the defects of traditional knitted underwear and meeting consumers' needs for comfort and functionality. Attached Figure Description

[0019] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 A schematic diagram of the highly conforming disposable non-woven underwear of this utility model;

[0021] Figure 2 A diagram illustrating the divisions of the human waist and hips;

[0022] Figure 3 This is a schematic diagram showing the cross-sectional profile and stress analysis of the waist and hip area.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Elastic waistband; 2. Underwear body; 3. Absorbent crotch area. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] Currently, the elastic bands of commonly available disposable underwear are mainly concentrated in the waist and legs, resulting in insufficient fit to the buttocks and a lack of effective support in the buttocks area. This leads to gaps between the underwear and the buttocks, affecting fit and comfort. Furthermore, the underwear is prone to shifting during exercise, and the waist area is prone to rolling up or sagging. In addition, the uneven force distribution can cause localized pressure on the body, leading to poor blood circulation and discomfort such as marks and itching.

[0027] To address the aforementioned issues, this invention adjusts the structure of the elastic layer and the waistband to make the disposable underwear fit the buttocks better. The increased stretch ratio of the spandex yarn in the waistband maintains restraint on the waist during wear and movement, preventing the waist from rolling down or sagging. Furthermore, the ergonomic stress range is calculated by detecting changes in the thickness and internal pressure of the elastic layer under different stretching conditions, thus verifying the underwear's fit.

[0028] After introducing the basic principles of this utility model, various non-limiting embodiments of this utility model are described in detail below. Any quantity of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0029] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0030] Example 1 of the highly conforming disposable non-woven underwear provided by this utility model:

[0031] like Figure 1 As shown, the highly conforming disposable non-woven underwear includes an underwear body 2, a crotch absorbent body 3 composited in the crotch area of ​​the underwear body 2, and a waist elastic band 1 set at the top of the underwear body 2.

[0032] The underwear body 2 includes a first base layer, a second base layer, and an elastic layer disposed between the first base layer and the second base layer. Both the first base layer and the second base layer are non-woven fabric layers, and the basis weight of both the first base layer and the second base layer is 12gsm. The elastic layer includes a number of main spandex filaments with a fineness of 140D and a spacing of 2mm between each main spandex filament. The elongation ratio of the main spandex filaments is 2.4 times.

[0033] In this embodiment, the crotch absorber 3 is a composite fabric of hot air cloth and pure cotton knitted fabric, and the weight range of the crotch absorber 3 is 90gsm-120gsm.

[0034] The waist elastic band 1 is used to stably fit the underwear body 2 at the waist. In this embodiment, the waist elastic band 1 includes a waist non-woven fabric and several waist spandex filaments. The waist non-woven fabric has four layers. The waist spandex filaments have a fineness of 720D, a spacing of 5mm, and a stretch ratio of 2.6 times.

[0035] The following is a verification of the conformity of the aforementioned highly conforming disposable non-woven underwear.

[0036] like Figure 2 and Figure 3 As shown, the human waist and hips are divided into three regions (upper, middle, and lower) along the warp direction. The side seam length of non-woven underwear is 180mm, therefore it is divided into 60mm sections. The human waist and hips are further divided into four regions along the weft direction: front, front side, back, and back side. In summary, the human waist and hips are divided into a total of 12 regions, as shown below. Figure 2 Table 1.

[0037]

[0038] The nonwoven underwear was worn on buttock molds of different sizes to represent the stretched state and the ultimate state. The length of the ruptured state is theoretically the product of the slit length of the elastic layer of the nonwoven underwear and the ratio of the main spandex filament, which is 1536mm. The natural state is the natural length of each area of ​​the nonwoven underwear when it is laid flat. The stretched dimensions of each state are shown in Table 2 below.

[0039]

[0040] Under four conditions, points were selected in these 12 regions to measure the thickness of the nonwoven elastic laminate. Under different conditions, the 12 regions were divided into arc levels according to the thickness test results, and the arc levels were divided into four levels: A, B, C, and D. The undulating arc gradually increases from A to D. The results of the arc level and the corresponding thickness range are shown in Table 3.

[0041]

[0042] The thickness distribution of the elastic fabric under tensile and ultimate conditions shows that the thickness range of region D is (0.195, 0.23) and (0.167, 0.176), and the thickness range of region C is (0.233, 0.253) and (0.18, 0.197). The smaller thickness in these regions indicates that the elastic fabric has higher tensile strength and conformity in these areas, and can closely conform to the protruding parts of the waist and hips. These areas are mostly distributed on the front of the body, proving that the elastic fabric is stretched more severely and subjected to more obvious stress on the front of the body because of its greater curvature.

[0043] In contrast, the thickness ranges of regions B and A are (0.254, 0.28) and (0.201, 0.238), and (0.294, 0.323) and (0.260, 0.284), respectively. These regions have a greater thickness of elastic fabric and less deformation compared to areas with larger curvature. However, the thickness of the elastic fabric in its natural state is 1.12 mm, demonstrating that the elastic fabric still exhibits stretch in regions A and B, offering better fit than traditional textiles. This optimized thickness distribution allows the elastic underwear to better adapt to the body's curves, stretching and deforming with the body's contours. The adaptive thickness design reduces slippage and discomfort during wear, thus providing a higher degree of fit and support.

[0044] The thickness test results show that the thickness of the elastic laminate of the nonwoven underwear varies with the curvature of the human body under different deformation states. Similarly, due to the different curvatures of the human body, the magnitude of the inward force at each point in each region also varies. The nonwoven underwear is worn on a buttock model, and the forces on the upper, middle, and lower warp sections in the weft direction are considered as the same force, meaning the force value is consistent when the nonwoven underwear is stretched to the corresponding body part in its natural state. Because the curvature of the human body varies, the pressure of the same force on the body is also different under different curvatures. Therefore, by calculating the pressure of the three warp sections on the body in each weft section, and comparing the changes in these pressure values, the fit of the elastic laminate in 12 regions is verified. First, the angles of the tangents of each section under the same weft horizontal line in the three warp sections are measured, as shown in the schematic diagram. Figure 3 The values ​​of the decomposed force and tangent (force direction) angle for each region are shown in Table 4.

[0045]

[0046] Although the inward force on the body varies due to the curvature of the human body, resulting in different force distribution and tangential (force direction) angles in different areas, the tensile force value in the same weft direction is the same. The non-woven underwear was cut into three pieces (top, middle, and bottom) along the warp direction. Each piece was then stretched to the same size for different areas of the body (size values ​​are shown in Table 2). The required tensile force values ​​are shown in Table 5 below. It can be seen that the upper section, due to the composite of 720D spandex yarn and being a four-layer non-woven fabric, experiences greater force. The greater force at the waist reduces downward slippage of the lower back during exercise, minimizing discomfort.

[0047]

[0048] Based on the tensile force required to stretch to different states, and the internal pressure and angle of the elastic laminate on the human body, the pressure exerted by the non-woven underwear on the human body in 12 regions is calculated as shown in Table 6 below. The calculation method is F1 = F0·cos(θ), where F1 is the internal pressure on the human body, F0 is the force required to stretch to a fixed length, and θ is the angle between the internal pressure and the direction of the tensile force. As can be seen from the table, the magnitude of the force varies in different regions of the human body. In the natural state, there is no force. In the stretched state (normal body shape wearing condition), the upper back exerts the greatest pressure on the human body at 2.55N, followed by the upper back side at 2.23N. There is also an inward contraction force on the buttocks, which can improve the fit of the elastic non-woven underwear to the buttocks, helping it to deform with body movements during exercise and improving the sense of coverage. In the extreme state (large-sized body shape buttock model, the limit of wearing), the pressure on the upper back and upper back side is still the greatest, reaching 7.38 and 6.46N respectively, which is greater than the pressure on the buttocks in the stretched state. When nonwoven fabric is in a ruptured state, the fibers will break due to stretching, making it unsuitable for human wear and subject to excessive pressure, reaching up to 13.8N.

[0049] The elastic band at the top waist has a tensile strength 1.2 times greater than that of the adjacent spandex yarns. This ensures the stability of the waist area during movement, preventing it from sagging, and also maintains the coordination of the ratio with the surrounding spandex yarns, minimizing the impact on the wearer's comfort.

[0050] While this specification has shown and described numerous embodiments of the present invention, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover the modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A highly conforming disposable non-woven underwear, comprising: The underwear body includes a first layer, a second layer, and an elastic layer disposed between the first layer and the second layer. The crotch absorber is located in the crotch area of ​​the underwear body; The elastic waistband is located at the waist of the underwear body and is used to make the underwear body fit the waist stably. The first and second base layers are both non-woven fabric layers, and the basis weight of the first and second base layers is in the range of 10gsm-18gsm; the elastic layer includes a plurality of main spandex filaments, the fineness of the main spandex filaments is in the range of 105D-150D, the spacing between each main spandex filament is 2mm; the elongation ratio of the main spandex filaments is 2.2 times-2.7 times. The waist elastic band includes a waist non-woven fabric and several waist spandex filaments. The waist spandex filaments have a fineness of 720D, a spacing of 5mm, and a stretch ratio of 2.4 to 2.8 times.

2. The highly conformable disposable nonwoven pant of claim 1, wherein: The basis weight range for both the first and second base layers is 10 gsm to 14 gsm.

3. The highly conformable disposable nonwoven pant of claim 1, wherein: The main spandex filament has a fineness of 140D and a draw ratio of 2.

4.

4. The highly conformable disposable nonwoven pant of claim 1, wherein: The elongation ratio of the spandex yarn at the waist is 2.6 times.

5. The highly conformable disposable nonwoven pant of claim 4, wherein: The non-woven fabric at the waist has four layers.

6. The highly conformable disposable nonwoven pant of claim 1, wherein: The crotch absorber is made of hot-air composite pure cotton knitted fabric.

7. The highly conformable disposable nonwoven pant of claim 6, wherein: The weight range of the crotch absorbent is 90 gsm to 120 gsm.

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