Ergonomic pants-type sanitary towel and preparation method thereof

Abstract

The invention relates to the field of hygienic products, provides a pants-type sanitary towel conforming to ergonomics and a preparation method thereof, and solves the problems that the pants-type sanitary towel in the prior art has foreign body sensation during sleeping on one side and is easy to clamp legs during movement due to structural design defects. Comprising an absorber and an outer clothes layer arranged outside the absorber, the outer clothes layer is composed of a front piece and a rear piece, the front piece and the rear piece each comprise an outer layer, an elastic material layer and an inner layer which are sequentially laminated from outside to inside, the waist width of the rear piece is larger than that of the front piece by more than 20%, and the length of the rear piece is larger than that of the front piece by more than 10%. The crotch area has no transverse elasticity but has longitudinal elasticity, the inner layer of the outer clothes layer is turned over outwards to be compounded with the longitudinal upper half section of the outer layer of the outer clothes layer in a gluing mode, and the longitudinal lower half section of the outer layer of the outer clothes layer is not glued to form a skirt edge.

Description

Technical Field

[0001] The present invention relates to the field of sanitary products, in particular to an ergonomic pants-type sanitary napkin and a preparation method thereof. Background Art

[0002] Conventional pant-style sanitary napkins are designed with an integrated front and back piece, and the front and back pieces are of equal width around the waist, which can cause problems such as legs getting stuck when moving and a foreign body sensation when sleeping on the side.

[0003] Chinese Patent Publication No. CN218220452U discloses a menstrual pant with an elastic waist, which comprises an elastic pant body, an absorbent core arranged on the inner side of the elastic pant body, the elastic pant body comprising an outer waist non-woven fabric layer and an inner waist non-woven fabric layer, an elastic film layer arranged between the outer waist non-woven fabric layer and the inner waist non-woven fabric layer, the two end edges of the outer waist non-woven fabric layer are bent to cover the elastic film layer and the inner waist non-woven fabric layer, and are fixed by point pressure punching, a first elastic layer is arranged on the inner side of the bent two end edges of the outer waist non-woven fabric layer, and the absorbent core is bonded to the inner waist non-woven fabric layer; the menstrual pant with an elastic waist can make the elastic performance of the entire elastic pant body better, and compared with the existing spandex yarn structure, the production efficiency is faster, and the elastic film is not easy to break during the production process, which effectively improves the qualified rate of the product, does not need to use spandex sericin, reduces the energy consumption of sol, saves production costs, and achieves the purpose of environmental protection. However, the elastic membrane has limited stretchability and is less breathable than spandex yarns. In addition, the waistline is still designed with equal width, and the problems of foreign body sensation and leg jamming when sleeping on the side remain unsolved. Summary of the Invention

[0004] Therefore, in order to solve the above problems, the present invention provides an ergonomic pant-type sanitary napkin and a preparation method thereof, which solves the problem that the pant-type sanitary napkins in the prior art have a foreign body sensation when sleeping on the side and are easily stuck in the legs when moving due to structural design defects.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: an ergonomic pant-type sanitary napkin, comprising an absorbent body and an outer garment layer arranged outside the absorbent body, wherein the absorbent body is defined to have a transverse direction along the width direction and a longitudinal direction along the length direction, the outer garment layer is composed of a front piece and a back piece, one longitudinal end of the absorbent body is connected to the front piece, and the other end of the absorbent body is connected to the back piece, the transverse sides of the front piece are fixedly welded to the transverse sides of the back piece to form a closed structure with leg openings and waist openings, and the waist has a front waist area and a front waist abdominal area connected in sequence in the longitudinal direction. , crotch area, back hip area, back waist area, back waist area, the front piece and the back piece both include an outer layer, an elastic material layer, and an inner layer stacked in sequence from the outside to the inside, the waist width of the back piece is more than 20% wider than the waist width of the front piece, the length of the back piece is more than 10% longer than the length of the front piece, the elasticity of the front waist area > the elasticity of the back waist area > the elasticity of the front waist abdominal area ≥ the elasticity of the back waist area ≥ the elasticity of the back hip area, the crotch area does not have transverse elasticity but has longitudinal elasticity, the inner layer of the outer garment layer is folded outwards and composited with the longitudinal upper half of the outer layer of the outer garment layer, and the longitudinal lower half is not glued to form a skirt.

[0006] Furthermore, the outer layer of the outer garment layer and the inner layer of the outer garment layer have a non-glue-applied area of ​​10-40 mm starting from a position 5-25 mm longitudinally downward from the waistband.

[0007] Furthermore: a middle layer is provided between the outer layer of the outer garment layer and the elastic material layer, and the middle layer is non-woven fabric.

[0008] Furthermore: the waist width of the back piece / the waist width of the front piece = 1.2-2.2.

[0009] Furthermore: the front waist area, front waist and abdominal area, back hip area, back waist area and back waist area all have a first elastic layer, the first elastic layer is composed of spandex yarn with a fineness ranging from 70dtex to 940dtex, the spacing between the spandex yarns is 1.5mm to 6.5mm, and the stretching ratio of the spandex yarn is 1.8-3.0.

[0010] Furthermore: a second elastic layer is provided in the front waist region and the back waist region, the second elastic layer is composed of spandex yarns with a fineness ranging from 620dtex to 940dtex, a spandex yarn spacing ranging from 2.0mm to 25mm, and a spandex yarn stretching ratio of 2.0 to 3.5.

[0011] Furthermore: the spandex yarns extending from the crotch area to the rear hip area have a fineness ranging from 470dtex to 940dtex, a spandex yarn spacing ranging from 2.0mm to 12.5mm, and a spandex yarn stretching ratio of 2.0 to 3.5.

[0012] Furthermore: the crotch area has a spandex yarn distribution with a fineness ranging from 470dtex to 940dtex, a spandex yarn spacing ranging from 2.5mm to 25.0mm, and a spandex yarn stretching ratio of 1.5 to 3.0.

[0013] A method for preparing an ergonomic pant-type sanitary napkin comprises the following steps:

[0014] (1) Preparation of outer clothing layer

[0015] S1. Preparing a front sheet: unwinding and conveying an outer nonwoven fabric, positioning and applying glue on the outer nonwoven fabric, then laminating the middle layer, elastic material layer, and inner layer of the outer garment layer online, wherein the longitudinal length of the inner layer is greater than the longitudinal length of the outer nonwoven fabric, and then folding the inner layer outward to laminat e it with glue on the longitudinal upper half of the outer layer of the outer garment layer, while leaving the longitudinal lower half un-glued, to form a skirt;

[0016] S2, preparing the back sheet;

[0017] S3, folding and shortening the longitudinal length of the rear panel so that the rear panel is equal in length to the front panel, and eliminating the inconsistency in transverse width of the front panel and the rear panel by using a conveying speed difference: front panel conveying speed / rear panel conveying speed = rear panel width / front panel width;

[0018] (2) preparing an absorbent body;

[0019] (3) The absorbent body is compounded with the front sheet and the back sheet, folded in half, welded, and cut to obtain a single ergonomic pant-type sanitary napkin.

[0020] Furthermore, step S1 of preparing the front piece also includes the preparation of the middle layer of the outer garment layer. The specific process is: the middle layer non-woven fabric of the outer garment layer, the elastic material layer and the inner layer are composited by online transmission, and then composited with the outer layer non-woven fabric that is transmitted online. The longitudinal length of the inner layer is greater than the longitudinal length of the outer layer non-woven fabric. Then, the inner layer is folded outward and composited with the longitudinal upper half of the outer layer of the outer garment layer by gluing, and the longitudinal lower half is not glued to form a skirt.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are:

[0022] 1. The panty-style sanitary napkin product of this application features a three-dimensional waist skirt design. The skirt is formed by folding the inner layer of the outer garment outward and bonding it to the upper half of the outer layer of the outer garment with adhesive. The lower half has an unadhesive area of ​​more than 10 mm, forming a raised portion of the skirt. The outer layer and the inner layer of the outer garment of this application have an unadhesive area of ​​10-40 mm starting from a position 5-25 mm longitudinally below the waistband. This forms a puffy portion of the skirt. The three-dimensional skirt not only improves visual aesthetics and differentiates the appearance, but also enhances softness and fluffiness at the waistline, giving consumers a better tactile experience.

[0023] 2. The front and back pieces of the outer garment layer of the present application adopt an unequal-sided design, which is more ergonomic and more comfortable to wear. Conventional pant-type sanitary napkins are all made of an integrated process and design of the front and back pieces. The waist width of the front piece is equal to the waist width of the back piece. When worn, the front and back pieces are sealed at the position where the human body is under pressure when sleeping on the side, which easily produces a foreign body sensation. The front and back pieces of the present application are independently formed, and the waist width of the back piece is more than 20% wider than the waist width of the front piece. When worn, the front and back pieces are sealed at a position slightly in front of the human body, 5-50mm away from the frontmost convex point of the hip bone. In this way, when worn, the front piece remains at the front of the human body and will not be "stuck in the legs". The back piece is designed to wrap the entire buttocks and extend close to the front of the hip bone. When a person moves, the back piece stretches, which better achieves the wrapping of the buttocks. Since the thickness of the human buttocks is significantly greater than that of the front triangle area, the corresponding capacity of the back piece of the briefs is greater than that of the front piece. Therefore, the front and back pieces are formed independently, and the back piece is more than 10% longer than the front piece. When worn, the capacity of the back piece is increased by more than 10% compared with the front piece. The inconsistent length and width of the front and back pieces are more ergonomic. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of a product according to embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the expanded structure of a product according to embodiment 1 of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the front piece and the rear piece in Example 1 of the present invention. DETAILED DESCRIPTION

[0027] Example 1

[0028] refer to Figures 1 to 3, an ergonomic pant-type sanitary napkin, comprising an absorbent body 1 and an outer garment layer arranged outside the absorbent body 1, wherein the absorbent body 1 has a transverse direction along the width direction and a longitudinal direction along the length direction, and the outer garment layer is composed of a front piece 2 and a back piece 3, one longitudinal end of the absorbent body 1 is connected to the front piece 2, and the other end of the absorbent body 1 is connected to the back piece 3, and the transverse sides of the front piece 2 and the transverse sides of the back piece 3 are fixedly welded to form a closed structure with leg openings and waist openings, and the waist circumference has a front waist circumference area, a front waist abdominal circumference area, a crotch area, a back hip circumference area, a back waist circumference area, and a back waist circumference area connected in sequence in the longitudinal direction, The front piece 2 and the back piece 3 both include an outer layer, an elastic material layer, and an inner layer which are stacked in sequence from the outside to the inside. The waist width of the back piece 3 is 25% wider than that of the front piece 2, and the length of the back piece is 20% longer than that of the front piece. When the user wears it, the front piece is kept at the front end of the human body to avoid getting stuck in the legs. The back piece wraps the entire buttocks and extends to near the front end of the hip bone. When the user moves, the back piece is stretched to better wrap the buttocks. Since the thickness of the human buttocks is significantly greater than the thickness of the front triangle area, the back piece is designed to be 20% longer than the front piece. When worn, the capacity of the back piece is increased by about 20% compared with the front piece, making it more comfortable to wear.

[0029] The elasticity of the front waist area is greater than the elasticity of the back waist area, and the elasticity of the front waist and abdominal area is greater than or equal to the elasticity of the back waist area and greater than or equal to the elasticity of the back hip area. The crotch area does not have transverse elasticity but has longitudinal elasticity. The inner layer of the outer garment layer is folded outward and bonded with the longitudinal upper half of the outer layer of the outer garment layer, while the longitudinal lower half is not glued to form a skirt 4.

[0030] Specifically, the outer layer of the outer garment layer and the inner layer of the outer garment layer have a 20 mm non-glue area starting from 10 mm longitudinally downward of the waistband, and the "waistband" refers to the longitudinal top of the waist opening, so that this area has a bubble wrinkle visual effect. In addition, due to the lack of glue, it is more breathable and soft.

[0031] The front waist region, front waist and abdominal region, back hip region, back waist region, and back waist region all have a first elastic layer composed of spandex yarns with a fineness ranging from 70 dtex to 940 dtex, a spacing between the yarns ranging from 1.5 mm to 6.5 mm, and a stretch ratio of 1.8 to 3.0. A second elastic layer is also provided in the front and back waist regions. The second elastic layer is composed of spandex yarns with a fineness ranging from 620 dtex to 940 dtex, a spacing between the yarns ranging from 2.0 mm to 25 mm, and a stretch ratio of 2.0 to 3.5. The crotch region extending to the back hip region has spandex yarns with a fineness ranging from 470 dtex to 940 dtex, a spacing between the yarns ranging from 2.0 mm to 12.5 mm, and a stretch ratio of 2.0 to 3.5. The crotch area has spandex yarns with a fineness ranging from 470dtex to 940dtex, a spandex yarn spacing ranging from 2.5mm to 25.0mm, and a spandex yarn stretching ratio of 1.5 to 3.0.

[0032] Through the above settings, the waist circumference of the present application has a better elastic comfort coefficient, which is between 1.1-2.1. Specifically, the elastic comfort coefficient = stretching force / restoring force at the same position, where the stretching force and restoring force are both taken as the corresponding force values ​​when the product waist circumference is stretched to the length of the corresponding stretching ratio and restored to the standard waist circumference size. The standard waist circumference of size M is 90cm, the standard waist circumference of size L is 95cm, and the standard waist circumference of size XL is 100cm.

[0033] The tensile recovery force test method is:

[0034] Sampling: Cut off the elastic waist area and the side seal area of ​​the front and back pieces;

[0035] Test: Stretch the sample along the width direction of the product to the same length as the stretch ratio of the sample, and then return it to the initial length;

[0036] Value: Take the force value corresponding to the stretching and recovery of the specimen to the standard waist size.

[0037] Specifically, in this embodiment, the spandex yarn selected for the front waist area is 800dtex, and the longitudinal spacing between each spandex yarn is 5mm; the spandex yarn selected for the back waist area is 800dtex, and the longitudinal spacing between each spandex yarn is 5mm; the spandex yarn selected for the front waist and abdominal area is 156dtex, and the longitudinal spacing between each spandex yarn is 2mm; the spandex selected for the back waist area is 156dtex, and the longitudinal spacing between each spandex yarn is 2mm; the spandex selected for the back hip area is 156dtex, and the spacing between each spandex yarn is 2mm; the spandex selected for the crotch area extending to the back hip area is 940dtex, and the spacing between each spandex yarn is 8mm.

[0038] Through testing, the tensile force of the front piece is 2.44N, the recovery force is 1.45N, and the stretch-recovery ratio is 1.68. The tensile force of the back piece is 2.16N, the recovery force is 1.35N, and the stretch-recovery ratio is 1.6. The elastic comfort coefficient is better and it is more comfortable to wear.

[0039] The method for preparing the above-mentioned ergonomic pant-type sanitary napkin comprises the following steps:

[0040] (1) Preparation of outer clothing layer

[0041] S1. Preparing a front panel: unwinding and conveying the outer nonwoven fabric of the front panel, applying glue to the outer nonwoven fabric, and then laminating the spandex yarn and the inner layer online, wherein the longitudinal length of the inner layer is greater than the longitudinal length of the outer nonwoven fabric. The inner layer is then folded outward and laminated with the longitudinal upper half of the outer layer of the outer garment layer by gluing, while the longitudinal lower half is not gluing to form a skirt. In addition, the outer and inner layers of the front panel have a 20 mm unglued area starting from a position 10 mm longitudinally below the waistband, so that this area forms a bubble visual effect, which not only improves breathability but also improves softness and makes it more comfortable to wear.

[0042] S2, preparing the back sheet: unwinding and conveying the outer non-woven fabric of the back sheet online, applying glue to the outer non-woven fabric of the back sheet, laminating the spandex yarn and the inner layer online, and performing point-breaking processing on the spandex yarn at the waist of the back sheet;

[0043] S3. Folding and shortening the longitudinal length of the rear panel so that the rear panel is equal in length to the front panel, and eliminating the inconsistency in transverse width of the front panel and the rear panel by using the speed difference of conveying the front panel and the rear panel: front panel conveying speed / rear panel conveying speed = rear panel width / front panel width; after the above process, the front panel and the rear panel are obtained with the same transverse width and longitudinal length;

[0044] (2) preparing an absorbent body;

[0045] (3) The absorbent body is compounded with the front sheet and the back sheet, folded in half, welded, and cut to obtain a single ergonomic pant-type sanitary napkin.

[0046] Example 2

[0047] With reference to Example 1, the specific parameters of the spandex yarns used in the front waist region, front waist and abdominal region, rear hip region, rear waist region, rear waist region and crotch region of this embodiment are different from those of Example 1. Other technical solutions are the same as those of Example 1.

[0048] In this embodiment, the spandex yarn used in the front waist area is 940dtex, and the longitudinal spacing between each spandex yarn is 4mm. The spandex yarn used in the back waist area is 800dtex, and the longitudinal spacing between each spandex yarn is 4mm. The spandex yarn used in the front waist and abdominal area is 156dtex, and the longitudinal spacing between each spandex yarn is 2mm. The spandex used in the back waist area is 156dtex, and the longitudinal spacing between each spandex yarn is 2mm. The spandex used in the back hip area is 940dtex, and the spacing between each spandex yarn is 25mm. The spandex yarn used in the crotch area extending to the back hip area is 940dtex, and the spacing between each spandex yarn is 5mm.

[0049] Through testing, the tensile force of the front piece is 3.45N, the recovery force is 1.96N, and the stretch-recovery ratio is 1.76. The tensile force of the back piece is 3.64N, the recovery force is 1.81N, and the stretch-recovery ratio is 2.01. The overall wearability is relatively elastic and comfortable.

[0050] Example 3

[0051] With reference to Example 1, the specific parameters of the spandex yarns used in the front waist region, front waist and abdominal region, rear hip region, rear waist region, rear waist region and crotch region of this embodiment are different from those of Example 1. Other technical solutions are the same as those of Example 1.

[0052] The spandex yarn used in the front waist area of ​​this embodiment is 800dtex, and the longitudinal spacing between each spandex yarn is 5mm. The spandex yarn used in the back waist area is 800dtex, and the longitudinal spacing between each spandex yarn is 3mm. The spandex yarn used in the front waist and abdominal area is 156dtex, and the longitudinal spacing between each spandex yarn is 2mm. The spandex used in the back waist area is 156dtex, and the longitudinal spacing between each spandex yarn is 2mm. The spandex used in the back hip area is 940dtex, and the spacing between each spandex yarn is 18.75mm. The spandex yarn used in the crotch area extending to the back hip area is 940dtex, and the spacing between each spandex yarn is 8mm.

[0053] Through testing, the tensile force of the front panel of this embodiment is 5.65N, the restoring force is 3.50N, and the stretch-recovery ratio is 1.61. The tensile force of the back panel is 4.31N, the restoring force is 2.13N, and the stretch-recovery ratio is 2.02.

[0054] Example 4

[0055] With reference to Example 1, the specific parameters of the spandex yarns used in the front waist region, front waist and abdominal region, rear hip region, rear waist region, rear waist region and crotch region of this embodiment are different from those of Example 1. Other technical solutions are the same as those of Example 1.

[0056] In this embodiment, the spandex yarn used for the front waist area is 620dtex, and the longitudinal spacing between each spandex yarn is 4mm. The spandex yarn used for the back waist area is 620dtex, and the longitudinal spacing between each spandex yarn is 4mm. The spandex yarn used for the front waist and abdominal area is 470dtex, and the longitudinal spacing between each spandex yarn is 7mm. The spandex used for the back waist area is 470dtex, and the longitudinal spacing between each spandex yarn is 5mm. The spandex used for the back hip area is 470dtex, and the spacing between each spandex yarn is 15mm. The spandex yarn used for the crotch area extending to the back hip area is 470dtex, and the spacing between each spandex yarn is 5mm.

[0057] Through testing, the tensile force of the front panel of this embodiment is 3.23N, the restoring force is 2.63N, and the stretch-recovery ratio is 1.23N. The tensile force of the back panel is 4.23N, the restoring force is 3.19N, and the stretch-recovery ratio is 1.32.

[0058] Comparative Example

[0059] With reference to Example 1, the specific parameters of the spandex yarns used in the front waist region, front waist and abdominal region, rear hip region, rear waist region, rear waist region and crotch region of this comparative example are different from those of Example 1. Other technical solutions are the same as those of Example 1.

[0060] The spandex yarn used in the front waist area of ​​this comparative example is 940dtex, and the longitudinal spacing between each spandex yarn is 4mm; the spandex yarn used in the back waist area is 800dtex, and the longitudinal spacing between each spandex yarn is 4mm; the spandex yarn used in the front waist and abdominal area is 156dtex, and the longitudinal spacing between each spandex yarn is 2mm; the spandex used in the back waist area is 156dtex, and the longitudinal spacing between each spandex yarn is 2mm; the spandex yarn used in the crotch area extending to the back hip area is 940dtex, and the spacing between each spandex yarn is 5mm.

[0061] Through testing, the tensile force of the front piece of this comparative example is 5.77N, the recovery force is 2.53N, and the stretch-recovery ratio is 2.28. The tensile force of the back piece is 6.11N, the recovery force is 2.38N, and the stretch-recovery ratio is 2.57. The elasticity is tight and the wearing feeling is relatively tight.

[0062] The parameter layout of the above-mentioned embodiments 1 to 4 and the comparative example of the present application is shown in the following table:

[0063]

[0064] Among them, in the present invention, optimal elasticity refers to the optimal elasticity of the waist, which is neither too tight nor too constricting, and has the best wearing feeling. Comfortable elasticity refers to the overall wearing comfort of the waist, and the comfort level is second only to optimal elasticity. The upper limit of elasticity refers to the upper limit value of elastic comfort. If the upper limit value is exceeded, the elasticity of the waist is tight. The lower limit of elasticity is specifically: the lower limit value of elastic comfort. If the lower limit value is below the lower limit value, the elasticity of the waist is loose. Tight elasticity means that the waist is constricted as a whole and uncomfortable to wear.

[0065] In addition, a middle layer can be provided between the outer layer of the outer garment layer of the present application and the elastic material layer. The middle layer is a non-woven fabric. The specific preparation process is different in that the middle layer non-woven fabric of the outer garment layer, the elastic material layer and the inner layer are composited by online transmission, and then composited with the outer layer non-woven fabric that is transmitted online. The other preparation processes are the same as those in Example 1.

[0066] Theoretical support for the separate design of the front and back pieces of this application:

[0067] The front and back crotch of disposable underwear need to be designed separately, driven by human anatomy and activity needs. The hip curve is wider and thicker than the perineum, requiring more space in the back crotch. The front crotch should fit snugly against the perineum to avoid pressure. When walking or sitting, the back crotch requires more flexibility, while the front crotch should maintain a snug fit to reduce friction. For obese individuals, the back crotch may be more than 5 cm wider than the front crotch (due to fat accumulation in the buttocks). For thin individuals, the difference in front and back crotch width is smaller (approximately 2-3 cm).

[0068] Measurement method:

[0069] Front width:

[0070] Location: Between the legs at the widest part of the perineum (horizontally).

[0071] Method: The subject stands naturally, and the tape measure is placed horizontally around the widest point of the perineum (avoid being too tight or too loose).

[0072] Rear gear width

[0073] Location: At the widest part of the buttocks (between the ischial tuberosities).

[0074] Method: The subject stands sideways, with the tape measure passed horizontally around the widest point of the hips, keeping it parallel to the ground.

[0075]

[0076] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. An ergonomic pant-type sanitary napkin, comprising an absorbent body and an outer garment layer arranged outside the absorbent body, wherein the absorbent body has a transverse direction along the width direction and a longitudinal direction along the length direction, the outer garment layer is composed of a front piece and a back piece, one longitudinal end of the absorbent body is connected to the front piece, and the other end of the absorbent body is connected to the back piece, the transverse sides of the front piece are fixedly welded to the transverse sides of the back piece to form a closed structure with leg openings and waist openings, the waist circumference has a front waist circumference area, a front waist abdominal circumference area, a crotch area, a back hip circumference area, a back waist circumference area, and a back waist circumference area connected in sequence in the longitudinal direction, the front piece and the back piece both include an outer layer, an elastic material layer, and an inner layer stacked in sequence from the outside to the inside, characterized in that: The waist width of the back piece is more than 20% wider than the waist width of the front piece, the length of the back piece is more than 10% longer than the length of the front piece, the elasticity of the front waist area is greater than the elasticity of the back waist area, the elasticity of the front waist and abdominal area is greater than the elasticity of the back waist area, and the elasticity of the back hip area is greater than the elasticity of the back hip area. The crotch area has no transverse elasticity but has longitudinal elasticity. The inner layer of the outer garment layer is folded outward and bonded with the longitudinal upper half of the outer layer of the outer garment layer, while the longitudinal lower half is not glued to form a skirt.

2. The ergonomic pant-type sanitary napkin according to claim 1, characterized in that: The outer layer of the outer garment layer and the inner layer of the outer garment layer have a non-glue-applied area of ​​10-40 mm starting from a position 5-25 mm longitudinally downward from the waistband.

3. The ergonomic pant-type sanitary napkin according to claim 1, characterized in that: A middle layer is provided between the outer layer of the outer garment layer and the elastic material layer, and the middle layer is made of non-woven fabric.

4. The ergonomic pant-type sanitary napkin according to claim 1, characterized in that: The waist width of the back piece / the waist width of the front piece is 1.2-2.

2.

5. The ergonomic pant-type sanitary napkin according to claim 1, characterized in that: The front waist area, front waist and abdominal area, back hip area, back waist area and back waist area all have a first elastic layer, which is composed of spandex yarns with a fineness ranging from 70dtex to 940dtex, a spacing between the spandex yarns ranging from 1.5mm to 6.5mm, and a stretching ratio of the spandex yarns ranging from 1.8 to 3.

0.

6. The ergonomic pant-type sanitary napkin according to claim 5, characterized in that: A second elastic layer is further provided in the front waist region and the back waist region. The second elastic layer is composed of spandex yarns with a fineness ranging from 620dtex to 940dtex, a spandex yarn spacing ranging from 2.0mm to 25mm, and a spandex yarn stretching ratio of 2.0 to 3.

5.

7. The ergonomic pant-type sanitary napkin according to claim 6, characterized in that: The spandex yarns extending from the crotch area to the rear hip area have a fineness ranging from 470dtex to 940dtex, a spandex yarn spacing ranging from 2.0mm to 12.5mm, and a spandex yarn stretching ratio of 2.0 to 3.

5.

8. The ergonomic pant-type sanitary napkin according to claim 7, characterized in that: The crotch area has spandex yarns with a fineness ranging from 470 dtex to 940 dtex, a spandex yarn spacing ranging from 2.5 mm to 25.0 mm, and a spandex yarn stretching ratio of 1.5 to 3.

0.

9. A method for preparing an ergonomic pant-type sanitary napkin, characterized in that: The method comprises the following preparation steps: (1) Preparation of outer clothing layer S1. Preparing a front panel: unwinding and conveying an outer nonwoven fabric, positioning and applying glue on the outer nonwoven fabric, then laminating an elastic material layer and an inner layer online, wherein the longitudinal length of the inner layer is greater than the longitudinal length of the outer nonwoven fabric, and then folding the inner layer outward to laminat e it with glue on the longitudinal upper half of the outer layer of the outer garment layer, while leaving the longitudinal lower half un-glued, to form a skirt; S2, preparing the back sheet; S3, folding and shortening the longitudinal length of the rear panel so that the rear panel is equal in length to the front panel, and eliminating the inconsistency in transverse width of the front panel and the rear panel by using a conveying speed difference: front panel conveying speed / rear panel conveying speed = rear panel width / front panel width; (2) preparing an absorbent body; (3) The absorbent body is compounded with the front sheet and the back sheet, folded in half, welded, and cut to obtain a single ergonomic pant-type sanitary napkin.

10. The method for preparing an ergonomic pant-type sanitary napkin according to claim 9, characterized in that: Step S1 of preparing the front piece also includes preparing the middle layer of the outer garment layer. The specific process is: the middle layer non-woven fabric of the outer garment layer, the elastic material layer and the inner layer are composited by online transmission, and then composited with the outer non-woven fabric that is transmitted online. The longitudinal length of the inner layer is greater than the longitudinal length of the outer non-woven fabric. Then, the inner layer is folded outward and composited with the longitudinal upper half of the outer layer of the outer garment layer by gluing, and the longitudinal lower half is not glued to form a skirt.

Images