Daily pants type sanitary towel and preparation method thereof

Abstract

The invention relates to the field of hygienic products, provides a daily pants-type sanitary towel and a preparation method thereof, and solves the problems that a conventional pants-type sanitary towel is inconvenient to put on and take off, crotch is blocked and the sanitary towel is airtight. Comprising a sanitary napkin body, the sanitary napkin body is provided with a reusable closing system, the closing system is composed of a left waist tape, a right waist tape and a magic hook, a front piece and a rear piece are connected with the closing system, the front piece, the rear piece and the closing system are sealed through a left side seal and a right side seal, and a dotted line cut is arranged on the front piece close to the left side seal and the right side seal. Dotted line cut elastic pressing points are arranged within the range of 20 mm left and right of the dotted line cut, the dotted line cut and the elastic pressing points penetrate through or partially penetrate through the front piece, and the left waist tape and the right waist tape are provided with reinforcing embossed patterns. And the magic hook is shorter than the left and right waist tapes and is narrower than the left and right waist tapes.

Description

Technical Field

[0001] The present invention relates to the field of sanitary products, and particularly to a daily-use panty-shaped sanitary napkin and a preparation method thereof. Background Art

[0002] During a woman's menstrual period, choosing a suitable care product is crucial for ensuring her physical health and enhancing her quality of life. Although traditional sanitary napkins are widely used, they are prone to problems such as side leakage and back leakage during a woman's daily activities and special scenarios, causing many troubles to women. The emergence of panty-shaped sanitary napkins has, to a certain extent, made up for the shortcomings of traditional sanitary napkins. Their underwear-like wearing form can better fit the body, effectively reducing the risk of menstrual blood leakage and providing more convenience and peace of mind for a woman's activities during her menstrual period.

[0003] However, there are still some problems that need to be solved urgently with conventional panty-shaped sanitary napkins on the market. Difficulties in putting on and taking off are one of them. Many panty-shaped sanitary napkins are not designed with sufficient consideration for the operation needs of women in different physiological states. The process of wearing and removing them is often cumbersome, especially when a woman is physically uncomfortable or has limited mobility, which makes this problem more prominent and greatly affects the use experience. The crotch-binding phenomenon is also a common problem. The panty designs of some panty-shaped sanitary napkins lack accurate consideration of the female body structure. During wearing, they cannot well adapt to the movements of a woman's legs and buttocks, resulting in crotch-binding during daily activities such as walking and sitting. This not only makes a woman feel uncomfortable but may also affect her normal activity posture and efficiency. The problem of poor breathability cannot be ignored either. In order to pursue leak-proof effects, conventional panty-shaped sanitary napkins often pay too much attention to sealing performance in material selection and structural design while ignoring breathability. When wearing such products for a long time, a woman's private parts will be in a hot and humid environment, which is prone to breeding bacteria and causing gynecological problems such as itching and odor, seriously threatening a woman's reproductive health.

[0004] Chinese Patent Application No. CN201820401458.1 discloses a sanitary napkin pant and a diaper that are convenient to replace. The sanitary napkin pant that is convenient to replace includes a front waist area, an absorption area, and a rear waist area that are connected in sequence. The two sides of the front waist area are detachably connected to the corresponding two sides of the rear waist area respectively. Square elastic members are provided on the front waist area and the rear waist area respectively. The elastic member includes a first non-woven fabric layer, an elastic band layer, and a second non-woven fabric layer; a row of horizontally evenly spaced stitching points are adhesively formed by ultrasonic welding, and an elastic band passage for the elastic band to pass through is formed between two adjacent rows of stitching points. The sanitary napkin pant and the diaper of the present invention change the design of traditional sanitary napkin pants or diapers in which only the front waist area is provided with an elastic member and the side edges are not detachable. Elastic members are provided on both the front waist area and the rear waist area and the two sides are detachably connected, so that it can be worn without taking off the pants, improving the wearing efficiency and being more environmentally friendly and comfortable. However, the crotch of this sanitary napkin pant does not have longitudinal elasticity, and the crotch cannot be lifted, and there is still a problem of crotch binding during wearing.

[0005] Chinese Patent Application No. CN202022177166.4 discloses a multi-layer elastic waistband pant-type sanitary product, including a waist and a crotch. Lining cloths are provided on both the waist and the crotch. An absorption core and a surface layer are further provided on the lining cloth of the crotch. An elastic non-woven fabric layer is also provided on the waist lining cloth. The ends of the absorption core and the elastic non-woven fabric layer are overlapped. Elastic non-woven fabric is provided at the waist position instead of ordinary elastic rubber bands, which can not only achieve the elasticity of the waist, but also increase the contact area between the waist cloth and the skin, avoid the extrusion of the rubber band on the waist skin, and increase the comfort of the waist position of the diaper. And the absorption core of the crotch is extended to be superimposed with the elastic non-woven fabric at the waist, which increases the contact area between the absorption core and the skin, enhances the absorption effect, and at the same time avoids the influence of the wider elastic non-woven fabric on the absorption core and the influence of the absorption core on the width of the elastic non-woven fabric, further enhancing the comfort and practicality of the sanitary pants. However, the wearing and taking-off process of this pant-type sanitary product is cumbersome and inconvenient to use. Summary of the Invention

[0006] Therefore, in view of the above problems, the present invention provides a daily-use pant-type sanitary napkin and its preparation method, which solve the problems of inconvenient wearing and taking off, crotch binding, and airtightness of conventional pant-type sanitary napkins.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A daily pant-type sanitary napkin comprises a sanitary napkin body, wherein the sanitary napkin body comprises an absorbent body and an outer garment layer arranged outside the absorbent body, wherein the absorbent body is defined to have an absolute longitudinal direction along the length direction and an absolute transverse direction along the width direction, and the outer garment layer is divided into a front piece and a back piece with the narrowest line of the crotch as a dividing line, wherein the absorbent body comprises a liquid-permeable surface layer, a transmission layer, an absorbent core and a liquid-impermeable bottom layer stacked in sequence from top to bottom, and the outer garment layer comprises a closing system, an outer garment outer layer, an elastic material layer and an outer garment inner layer stacked in sequence from outside to inside; the sanitary napkin body is divided into a front waist area-front waist abdominal area-crotch area-back hip area-back waist area-back waist area in the absolute longitudinal direction, wherein the transverse elasticity of the back waist area is greater than the transverse elasticity of the front waist area> the transverse elasticity of the front waist abdominal area≥ the transverse elasticity of the back waist area> the transverse elasticity of the back hip area; the crotch area has no transverse elasticity but has longitudinal elasticity; the front waist area, the back waist area, the front waist abdominal area, the back waist area The first spandex yarn with a fineness of 70dtex-320dtex is evenly distributed in the sanitary napkin area, the second spandex yarn with a fineness of 620dtex-940dtex is also superimposed on the front waist area and the back waist area, the third spandex yarn with a fineness of 470dtex-940dtex is distributed in the back hip area, and the fourth spandex yarn with a fineness of 470dtex-940dtex is distributed in the crotch area; the sanitary napkin body has a reusable closing system, the closing system consists of left and right waist stickers and magic hooks, the front piece and the back piece are connected to the closing system, the front piece, the back piece and the closing system are sealed by left and right side seals, a dotted line cut is arranged on the front piece near the left and right side seals, and a dotted line cut de-elastic pressure point is arranged within a range of 20mm on the left and right of the dotted line cut, the dotted line cut and the de-elastic pressure point penetrate or partially penetrate the front piece, and the left and right waist stickers have reinforced embossing; the length of the magic hook is less than the length of the left and right waist stickers, and the width of the magic hook is less than the width of the left and right waist stickers.

[0009] The crotch area has no transverse elasticity but has longitudinal elasticity. The transverse elasticity is used to provide waist and hip wrapping, and the longitudinal elasticity is used to provide crotch lifting. The front waist area and the back waist area are also superimposed with a second spandex yarn with a fineness of 620dtex to 940dtex, which is used to enhance the elasticity of the waist area and make the product present an inverted triangle shape when placed naturally. The back hip area is distributed with a third spandex yarn with a fineness of 470dtex to 940dtex, which is used to provide elastic wrapping of the buttocks. The crotch area is distributed with a fourth spandex yarn with a fineness of 470dtex to 940dtex, which is used to provide upward pulling of the crotch.

[0010] The distribution of the first to fourth spandex yarns gives the daily-use pant-type sanitary napkin better waist elasticity and comfort.

[0011] Further, the waist circumference elastic comfort coefficient of the sanitary napkin body is 1.1 - 2.1.

[0012] Among them, the waist circumference elastic comfort coefficient = waist circumference tensile force / waist circumference recovery force, and both the waist circumference tensile force and the waist circumference recovery force are the force values corresponding to when the waist circumference is stretched to the standard waist circumference size. The standard waist circumference of size M is 90 cm, the standard waist circumference of size L is 95 cm, and the standard waist circumference of size XL is 100 cm. The appropriate range of the waist circumference elastic comfort coefficient is 1.1 - 2.1. When it is lower than 1.1, the waist circumference elasticity is insufficient, and it is obviously felt loose when worn. When it is higher than 2.1, it is difficult to pull open when worn, and there is an obvious constriction feeling after wearing for a period of time.

[0013] Further, an outer middle layer of the outer garment is also provided between the outer layer of the sanitary napkin body and the elastic material layer, and an inner middle layer of the outer garment is also provided between the elastic material layer and the inner layer of the outer garment.

[0014] Further, the distance between the first spandex filaments is 1.5 mm - 6.5 mm, the distance between the second spandex filaments is 2.0 mm - 12.5 mm, the distance between the third spandex filaments is 5.0 mm - 35.0 mm, and the distance between the fourth spandex filaments is 2.5 mm - 25.0 mm.

[0015] Further, the liquid-permeable surface layer is an ultrasonic composite three-dimensional surface layer, and the transmission layer is a long-acting antibacterial material.

[0016] Among them, the ultrasonic composite three-dimensional surface layer can reduce the contact area with the skin by more than 15%, meeting the requirements of dryness and breathability for daily-use panty sanitary napkins. The transmission layer selects a long-acting antibacterial material to meet the requirements of the complex external space environment and long usage time of daily-use sanitary napkins.

[0017] Further, the fineness of the elastic material in the elastic material layer ≥ 70 dtex.

[0018] Further, the tensile force of the elastic material distributed along the waist circumference > the tensile force of the elastic material distributed along the side waist circumference.

[0019] Further, the width of the narrowest area at the crotch of the outer garment layer < the width of the absorbent body layer.

[0020] A preparation method of a daily-use panty sanitary napkin includes the following steps:

[0021] S1. Composite the surface layer with the absorbent core: Use the lower wrapping layer to hold the cotton core, cover another upper wrapping layer on the upper surface of the cotton core, fold the lower wrapping layer upward in a C shape to form the absorbent core, then perform an R cut on the absorbent core, spray glue on the transmission layer and then composite the liquid-permeable surface layer, and then composite it with the absorbent core after the R cut to obtain a semi-finished absorbent body with the liquid-permeable surface layer - transmission layer - absorbent core from top to bottom;

[0022] S2. Absorber forming: The liquid-impermeable bottom layer is attached to the side margin, and spandex yarn for the side margin is laminated on the upper end of the side margin. The side margin is folded back inward, and elastic rubber bands are laminated on the bottom film. Then it is laminated with the absorber semi-finished product obtained through step S1 to obtain an absorber with a liquid-permeable surface layer - transfer layer - absorbent core - liquid-impermeable bottom layer from top to bottom. The absorber is peripherally sealed and cut flat;

[0023] S3. Outer garment layer forming: Fine denier spandex yarn is unrolled, and the warping stops automatically when the photo is taken. Then the back hip elastic is unrolled, and S elastic glue is scraped on the inner layer of the outer garment. The fine denier spandex yarn and the back hip elastic are laminated on the inner layer of the outer garment to obtain a semi-finished product of the outer garment layer. The outer layer of the outer garment is sprayed with fixing glue, S elastic is applied, and then it is laminated with the semi-finished product of the outer garment layer to obtain a preliminary finished product of the outer garment layer with the outer layer of the outer garment, elastic material layer, and inner layer of the outer garment from top to bottom. Then the S elastic of the preliminary finished product of the outer garment layer is point-cut, and the fine denier spandex yarn at the front and back waistlines is point-cut. Then the outer layer of the outer garment is O-cut;

[0024] S4. Closure system lamination: The left and right waist tapes are embossed, the magic hooks are glued and short-cut, and then the left and right waist tapes are laminated. The left and right waist tapes and the magic hooks are both embossed with diamond patterns. Then the left and right waist tapes are S-cut and transferred to the alignment position of the front and back waistlines after folding. The waist tapes are cut flat and positioned and laminated to the front waistline;

[0025] S5. Lamination of the outer garment layer and the absorber layer:

[0026] After the inner layer of the outer garment is cut flat, the outer layer of the outer garment is directly attached on the O-cutting device. The front and back waist elastic bands are applied, the outer layer of the outer garment is folded back, dotted cutting is performed, and the product is folded in half to align the front and back waists. The left and right waist tapes are laminated. The side waistlines are ultrasonically welded and cut integrally. Then, through the transfer wheel, the waistlines are folded inward from left to right, the product is folded in half, and it is conveyed by a belt to a small packet that has been sprayed with sealing glue. The small packet is transversely sealed and cut with a cutter to obtain the daily panty-shaped sanitary napkin.

[0027] By adopting the foregoing technical solutions, the beneficial effects of the present invention are as follows:

[0028] 1. When using the daily panty-shaped sanitary napkin prepared by this technical solution, first tear the bonding part between the magic hook on either the left or right side and the front piece, then tear the dotted cut on the same side. Then, the panty-shaped sanitary napkin is passed through the crotch to the waist in a suitable manner for the consumer, and the magic hook is re-bonded to the front piece. The other side is also worn and lifted to the waist and the magic hook is bonded to the front piece in the same way. The magic hook and the front piece can be bonded repeatedly. During the entire wearing process, it is not necessary for the consumer to completely take off their own clothes and pants. It is only necessary to retreat to the thigh area to wear the daily panty-shaped sanitary napkin, which greatly reduces the cumbersome actions for women to change the panty-shaped sanitary napkin.

[0029] 2. To adapt to the usage scenarios of daily pant-type sanitary napkins, and in view of the large amount of daytime activities and many changes in movements, in order to reduce the feeling of being squeezed in the crotch during activities, the width of the narrowest area of the crotch of the outer layer of the daily pant-type sanitary napkin is designed to be less than the width of the absorbent layer, which greatly reduces the width of the crotch material and reduces the pulling of the crotch.

[0030] 3. The lateral elasticity of the rear waist area is greater than the lateral elasticity of the front waist area. The lateral elasticity of the front waist and abdominal area is greater than the lateral elasticity of the rear waist area. The lateral elasticity of the rear hip area is greater than the lateral elasticity of the rear waist area. The front waist area and the rear waist area are also superimposed with a second spandex yarn to enhance the elasticity of the waist area. The fine denier spandex yarns at the front and rear waist areas are then point-cut. The prepared daily pant-type sanitary napkin has good waist elasticity and comfort.

[0031] 4. Daily-use pant-style sanitary napkins adopt an innovative elastic waist design, and the waist elastic comfort coefficient of the pant-style sanitary napkins is strictly controlled within the scientific range of 1.1-2.1. By accurately matching the three sizes of M / L / XL (corresponding to a waist circumference of 90-100cm), the product not only ensures that the stretching force is moderate and not easy to relax and deform, but also ensures that the recovery force is not overly tight, achieving a wearing experience of "one pull and it closes, and it will not be tight after a long time of wearing". Compared with traditional sanitary napkins, its one-piece cutting and moderately elastic waist system can not only adapt to changes in the waist and abdomen curves, but also effectively prevent side leakage and back leakage, which is especially suitable for use in dynamic scenes such as sports and daytime. It can maintain an excellent rebound rate, and there are no marks on the surface, truly achieving a double breakthrough in comfort and functionality, and meeting women's all-weather peace of mind protection needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of a daily-use pant-type sanitary napkin according to an embodiment of the present invention;

[0033] Figure 2 Schematic diagram of the front view of a daily-use pant-type sanitary napkin according to an embodiment of the present invention;

[0034] Explanation of the numbers in the figure: 1-sanitary napkin body, 2-closing system, 21-left and right waist stickers, 22-magic hook, 3-dotted line cut, 4-dotted line cut to eliminate the elastic pressure point, 5-reinforcement embossing, a-front waist area, b-front waist and abdominal area, c-crotch area, d-rear hip area, e-rear waist area, f-rear waist area. DETAILED DESCRIPTION

[0035] Example 1

[0036] refer to Figures 1 to 2, A daily-use panty sanitary napkin, comprising a sanitary napkin body 1. The sanitary napkin body 1 includes an absorbent body and an outer clothing layer disposed outside the absorbent body. The absorbent body is defined to have an absolute longitudinal direction along the length direction and an absolute transverse direction along the width direction. Taking the narrowest line of the crotch as the dividing line, the outer clothing layer is divided into a front piece and a rear piece. The absorbent body includes a liquid-permeable surface layer, a transmission layer, an absorbent core, and a liquid-impermeable bottom layer stacked in sequence from top to bottom. The outer clothing layer includes a closure system, an outer outer clothing layer, an elastic material layer, and an inner outer clothing layer stacked in sequence from outside to inside; in the absolute longitudinal direction, the sanitary napkin body is divided into a front waist region - a front waist and abdomen region - a crotch region - a rear hip region - a rear side waist region - a rear waist region. The transverse elasticity of the rear waist region > the transverse elasticity of the front waist region > the transverse elasticity of the front waist and abdomen region ≥ the transverse elasticity of the rear side waist region > the transverse elasticity of the rear hip region; the crotch region does not have transverse elasticity but has longitudinal elasticity; the front waist region, the rear waist region, the front waist and abdomen region, and the rear side waist region are all distributed with first spandex filaments with a fineness of 70 dtex. The front waist region and the rear waist region also simultaneously overlap with second spandex filaments with a fineness of 620 dtex. The rear hip region is distributed with third spandex filaments with a fineness of 470 dtex. The crotch region is distributed with fourth spandex filaments with a fineness of 470 dtex; the sanitary napkin body has a reusable closure system 2. The closure system 2 is composed of left and right waist stickers 21 and magic hooks 22. The front piece and the rear piece are connected to the closure system 2. The front piece and the rear piece are sealed by side seals on the left and right sides. Dotted cuts 3 are provided on the front piece near the side seals on the left and right sides. The left and right 20 mm of the dotted cuts have dotted cut anti-elastic compression points 4. The dotted cuts and the anti-elastic compression points penetrate or partially penetrate the front piece. Reinforcing embossments 5 are provided on the left and right waist stickers; the length of the magic hook < the length of the left and right waist stickers, and the width of the magic hook < the width of the left and right waist stickers.

[0037] Wherein, an outer middle layer of the outer clothing is further provided between the outer layer of the outer clothing and the elastic material layer, and an inner middle layer of the outer clothing is further provided between the elastic material layer and the inner layer of the outer clothing.

[0038] The spacing of the first spandex filaments is 1.5 mm, the spacing of the second spandex filaments is 2.0 mm, the spacing of the third spandex filaments is 5.0 mm, and the spacing of the fourth spandex filaments is 2.5 mm.

[0039] The liquid-permeable surface layer is an ultrasonic composite three-dimensional surface layer, and the transmission layer is a long-acting antibacterial material.

[0040] The fineness of the elastic material in the elastic material layer ≥ 70 dtex.

[0041] The tensile force of the elastic material distributed along the waist circumference > the tensile force of the elastic material distributed along the side waist circumference.

[0042] The width of the narrowest area of the crotch of the outer clothing layer < the width of the absorbent layer.

[0043] A method for preparing a daily-use panty-type sanitary napkin, comprising the following steps:

[0044] S1. Laminating the surface layer with the absorbent core: Using the lower wrapping layer to hold the cotton core, covering another upper wrapping layer on the upper surface of the cotton core, folding the lower wrapping layer upward in a C shape to form the absorbent core, then performing an R cut on the absorbent core, spraying glue on the transfer layer and laminating a liquid-permeable surface layer, and then laminating with the absorbent core after the R cut to obtain a semi-finished absorbent body with a liquid-permeable surface layer - transfer layer - absorbent core from top to bottom;

[0045] S2. Shaping the absorbent body: Laminating the liquid-impermeable bottom layer with the side edge, laminating side edge spandex on the upper end of the side edge, folding the side edge back inward, laminating elastic rubber bands on the bottom film, and laminating with the semi-finished absorbent body obtained through step S1 to obtain an absorbent body with a liquid-permeable surface layer - transfer layer - absorbent core - liquid-impermeable bottom layer from top to bottom, and performing a perimeter seal and a flat cut on the absorbent body;

[0046] S3. Shaping the outer clothing layer: Unwinding the fine denier spandex, stopping automatically when the warp winding and photographing are completed, then unwinding the back hip circumference rubber band, applying S rubber band glue to the inner layer of the outer clothing, laminating the fine denier spandex and the back hip circumference rubber band onto the inner layer of the outer clothing to obtain a semi-finished outer clothing layer; Spraying fixing glue on the outer layer of the outer clothing, applying S rubber bands, and then laminating with the semi-finished outer clothing layer to obtain a preliminary finished product of the outer clothing layer with an outer layer of the outer clothing, an elastic material layer, and an inner layer of the outer clothing from top to bottom, then cutting the S rubber bands of the preliminary finished product of the outer clothing layer, and cutting the fine denier spandex at the front and back waistlines, and then performing an O cut on the outer layer of the outer clothing;

[0047] S4. Attaching the closure system: Pressing the left and right waist tapes into sunflowers, gluing and short-cutting the magic hooks and then attaching them to the left and right waist tapes, pressing diamond patterns on both the left and right waist tapes and the magic hooks, then performing an S cut on the left and right waist tapes and transferring and conveying them to the alignment position of the front and back waist circumferences after folding, cutting the waist tapes flatly, and positioning and attaching the front waist circumference;

[0048] S5. Laminating the outer clothing layer with the absorbent layer:

[0049] After flatly cutting the inner layer of the outer clothing, directly attaching the outer layer of the outer clothing on the O-cutting device, applying front and back waist circumference rubber bands, folding back the outer layer of the outer clothing, performing a dotted cut, folding in half to align the front and back waists of the product, attaching the left and right waist tapes, performing an ultrasonic one-piece welding cut on the side waist circumferences, then making the waist circumferences wrap inward left and right through a transfer wheel, folding the product in half, and conveying it to a small packet that has been sprayed with sealing glue through a belt, and performing a transverse seal and a cutting with a cutter to obtain the daily-use panty-type sanitary napkin.

[0050] The waist circumference of the daily-use panty-type sanitary napkin in Example 1 was tested, and the experimental data obtained are shown in Table 1.

[0051] Table 1

[0052]

[0053] The test data in Table 1 show that the waist circumference of the daily-use panty sanitary napkin prepared in Example 1 is elastically comfortable.

[0054] Among them, the waist circumference elastic comfort coefficient = waist circumference tensile force / waist circumference recovery force, and both the waist circumference tensile force and the waist circumference recovery force are taken as the force values corresponding to when the waist circumference is stretched to the standard waist circumference size.

[0055] Example 2

[0056] A daily-use panty sanitary napkin, comprising a sanitary napkin body. The sanitary napkin body includes an absorbent body and an outer clothing layer arranged outside the absorbent body. The absorbent body is defined as having an absolute longitudinal direction along the length direction and an absolute transverse direction along the width direction. The outer clothing layer is divided into a front piece and a rear piece with the narrowest line in the crotch as the dividing line. The absorbent body includes a liquid-permeable surface layer, a transmission layer, an absorbent core, and a liquid-impermeable bottom layer stacked in sequence from top to bottom. The outer clothing layer includes a closure system, an outer outer clothing layer, an elastic material layer, and an inner outer clothing layer stacked in sequence from outside to inside; in the absolute longitudinal direction, the sanitary napkin body is divided into a front waist circumference area - a front waist and abdomen circumference area - a crotch area - a rear hip circumference area - a rear side waist circumference area - a rear waist circumference area. The transverse elasticity of the rear waist circumference area > the transverse elasticity of the front waist circumference area > the transverse elasticity of the front waist and abdomen circumference area ≥ the transverse elasticity of the rear side waist circumference area > the transverse elasticity of the rear hip circumference area; the crotch area does not have transverse elasticity but has longitudinal elasticity; the front waist circumference area, the rear waist circumference area, the front waist and abdomen circumference area, and the rear side waist circumference area are all distributed with first spandex filaments with a fineness of 130 dtex. The front waist circumference area and the rear waist circumference area also have second spandex filaments with a fineness of 700 dtex superimposed at the same time. The rear hip circumference area is distributed with third spandex filaments with a fineness of 580 dtex, and the crotch area is distributed with fourth spandex filaments with a fineness of 580 dtex; the sanitary napkin body has a reusable closure system, which is composed of left and right waist stickers and magic hooks. The front piece and the rear piece are connected to the closure system, and the front piece and the rear piece are sealed by left and right side seals. Dotted cuts are provided on the front piece near the left and right side seals. The left and right 20 mm of the dotted cuts have dotted cut elastic elimination pressure points. The dotted cuts and the elastic elimination pressure points penetrate or partially penetrate the front piece. The left and right waist stickers have reinforcing embossing; the length of the magic hook < the length of the left and right waist stickers, and the width of the magic hook < the width of the left and right waist stickers.

[0057] Among them, an outer middle outer clothing layer is further provided between the outer outer clothing layer and the elastic material layer, and an outer middle inner clothing layer is further provided between the elastic material layer and the inner outer clothing layer.

[0058] The spacing of the first spandex filament is 3 mm, the spacing of the second spandex filament is 4 mm, the spacing of the third spandex filament is 10 mm, and the spacing of the fourth spandex filament is 5 mm.

[0059] The liquid-permeable surface layer is an ultrasonic composite three-dimensional surface layer, and the transmission layer is a long-acting antibacterial material.

[0060] The fineness of the elastic material in the elastic material layer is > 70 dtex.

[0061] The tensile force of the elastic material distributed along the waist circumference > the tensile force of the elastic material distributed along the side waist circumference.

[0062] The width of the narrowest area at the crotch of the outer clothing layer < the width of the absorbent body layer.

[0063] A preparation method of a daily-use panty-shaped sanitary napkin includes the following steps:

[0064] S1. Composite the surface layer with the absorbent core: Use the lower wrapper to hold the cotton core, cover another upper wrapper on the upper surface of the cotton core, fold the lower wrapper upward in a C shape to form the absorbent core, then perform an R cut on the absorbent core, spray glue on the transmission layer and then composite the liquid-permeable surface layer, and then composite it with the absorbent core after the R cut to obtain a semi-finished absorbent body with the liquid-permeable surface layer - transmission layer - absorbent core from top to bottom;

[0065] S2. Shape the absorbent body: The liquid-impermeable bottom layer is attached to the gusset, the gusset spandex filament is composite at the upper end of the gusset, the gusset is folded back inward, elastic rubber bands are composite on the bottom film, and it is composite with the semi-finished absorbent body obtained through step S1 to obtain an absorbent body with the liquid-permeable surface layer - transmission layer - absorbent core - liquid-impermeable bottom layer from top to bottom, and the absorbent body is peripherally sealed and flat-cut;

[0066] S3. Shape the outer clothing layer: Unroll the fine-denier spandex filament, stop automatically when the warp is photographed, then unroll the back hip circumference rubber band, apply S rubber band glue to the inner layer of the outer clothing, composite the fine-denier spandex filament and the back hip circumference rubber band onto the inner layer of the outer clothing to obtain a semi-finished outer clothing layer; Spray fixed glue on the outer layer of the outer clothing, apply S rubber bands, and then composite it with the semi-finished outer clothing layer to obtain a preliminary finished outer clothing layer with the outer layer of the outer clothing, elastic material layer, and inner layer of the outer clothing from top to bottom. Then, cut the S rubber bands of the preliminary finished outer clothing layer at points, and cut the fine-denier spandex filaments at the front and back waist circumferences at points, and then perform an O cut on the outer layer of the outer clothing;

[0067] S4. Fit the closure system: Press the left and right waist tapes into sunflowers, apply glue and perform short cuts on the magic hooks and then fit the left and right waist tapes, press diamond patterns on both the left and right waist tapes and the magic hooks, then perform an S cut on the left and right waist tapes and transfer and convey them to the alignment position of the front and back waist circumferences after folding, and perform a flat cut on the waist tapes and position and fit the front waist circumference;

[0068] S5. Lamination of the outer clothing layer and the absorbent layer:

[0069] Cut the inner layer of the outer clothing horizontally and directly attach the outer clothing layer on the O-cut device. Apply the front and back waist elastics, fold back the outer clothing layer, perform dotted cutting, fold in half to align the front and back waists of the product, attach the left and right waist stickers, perform ultrasonic integrated welding and cutting on the side waist, then use the transfer wheel to fold the waist inwards from left to right, fold the product in half, and convey it by belt to the small packet that has been sprayed with sealing glue. The small packet is transversely sealed and cut with a cutter to obtain the daily-use panty-shaped sanitary napkin.

[0070] Detect the waist of the daily-use panty-shaped sanitary napkin in Example 2, and the experimental data obtained are shown in Table 2.

[0071] Table 2

[0072]

[0073] The test data in Table 2 show that the waist elasticity of the daily-use panty-shaped sanitary napkin prepared in Example 2 is on the tight side.

[0074] Example 3

[0075] A daily-use panty sanitary napkin, comprising a sanitary napkin body. The sanitary napkin body includes an absorbent body and an outer clothing layer disposed outside the absorbent body. It is defined that the absorbent body has an absolute longitudinal direction along the length direction and an absolute transverse direction along the width direction. Taking the narrowest line of the crotch as the dividing line, the outer clothing layer is divided into a front piece and a rear piece. The absorbent body includes a liquid-permeable surface layer, a transmission layer, an absorbent core, and a liquid-impermeable bottom layer stacked in sequence from top to bottom. The outer clothing layer includes a closure system, an outer outer clothing layer, an elastic material layer, and an inner outer clothing layer stacked in sequence from outside to inside; in the absolute longitudinal direction, the sanitary napkin body is divided into a front waist circumference area - a front waist and abdomen circumference area - a crotch area - a rear hip circumference area - a rear side waist circumference area - a rear waist circumference area. The transverse elasticity of the rear waist circumference area > the transverse elasticity of the front waist circumference area > the transverse elasticity of the front waist and abdomen circumference area ≥ the transverse elasticity of the rear side waist circumference area > the transverse elasticity of the rear hip circumference area; the crotch area has no transverse elasticity and has longitudinal elasticity; the front waist circumference area, the rear waist circumference area, the front waist and abdomen circumference area, and the rear side waist circumference area are all distributed with first spandex filaments with a fineness of 190 dtex. The front waist circumference area and the rear waist circumference area also have second spandex filaments with a fineness of 780 dtex superimposed at the same time. The rear hip circumference area is distributed with third spandex filaments with a fineness of 700 dtex. The crotch area is distributed with fourth spandex filaments with a fineness of 700 dtex; the sanitary napkin body has a reusable closure system. The closure system is composed of left and right waist stickers and magic hooks. The front piece and the rear piece are connected to the closure system. The front piece and the rear piece are sealed by left and right side seals. Dotted cuts are provided on the front piece close to the left and right side seals. There are dotted cut anti-elastic compression points within 20 mm on the left and right of the dotted cut. The dotted cut and the anti-elastic compression points penetrate or partially penetrate the front piece. The left and right waist stickers have reinforced embossing; the length of the magic hook < the length of the left and right waist stickers, and the width of the magic hook < the width of the left and right waist stickers.

[0076] Wherein, an outer middle clothing layer is further provided between the outer outer clothing layer and the elastic material layer, and an inner middle clothing layer is further provided between the elastic material layer and the inner outer clothing layer.

[0077] The spacing of the first spandex filaments is 3.5 mm, the spacing of the second spandex filaments is 6 mm, the spacing of the third spandex filaments is 15 mm, and the spacing of the fourth spandex filaments is 10 mm.

[0078] The liquid-permeable surface layer is an ultrasonic composite three-dimensional surface layer, and the transmission layer is a long-acting antibacterial material.

[0079] The fineness of the elastic material in the elastic material layer > 70 dtex.

[0080] The tensile force of the elastic material distributed along the waist circumference > the tensile force of the elastic material distributed along the side waist circumference.

[0081] The width of the narrowest area of the crotch of the outer clothing layer < the width of the absorbent body layer.

[0082] A preparation method for a daily-use panty sanitary napkin, comprising the following steps:

[0083] S1. Laminating the surface layer with the absorbent core: Using the lower wrapping layer to hold the cotton core, covering another upper wrapping layer on the upper surface of the cotton core, folding the lower wrapping layer upwards in a C shape to form the absorbent core, then performing an R cut on the absorbent core, spraying adhesive on the transmission layer and laminating a liquid-permeable surface layer, and then laminating with the absorbent core after the R cut to obtain a semi-finished absorbent body with a liquid-permeable surface layer - transmission layer - absorbent core from top to bottom;

[0084] S2. Shaping the absorbent body: Bonding the liquid-impermeable bottom layer to the side margin, laminating side-margin spandex on the upper end of the side margin, folding the side margin back inwards, laminating elastic rubber bands on the bottom film, and laminating with the semi-finished absorbent body obtained through step S1 to obtain an absorbent body with a liquid-permeable surface layer - transmission layer - absorbent core - liquid-impermeable bottom layer from top to bottom, and performing a peripheral seal and a flat cut on the absorbent body;

[0085] S3. Shaping the outer clothing layer: Unwinding the fine-denier spandex, stopping the warping automatically by photo, then unwinding the back hip circumference rubber band, applying S rubber band glue on the inner layer of the outer clothing, laminating the fine-denier spandex and the back hip circumference rubber band onto the inner layer of the outer clothing to obtain a semi-finished outer clothing layer; Spraying fixing glue on the outer layer of the outer clothing, applying S rubber bands, and then laminating with the semi-finished outer clothing layer to obtain a preliminary finished product of the outer clothing layer with an outer clothing layer - elastic material layer - inner layer of the outer clothing from top to bottom, then cutting the S rubber bands of the preliminary finished product of the outer clothing layer at points, and cutting the fine-denier spandex at the front and back waist circumferences at points, and then performing an O cut on the outer clothing layer;

[0086] S4. Attaching the closure system: Pressing the left and right waist tapes into sunflowers, applying glue and performing short cuts on the magic hooks and then attaching them to the left and right waist tapes, pressing diamond patterns on both the left and right waist tapes and the magic hooks, then performing an S cut on the left and right waist tapes and transferring and conveying them to the alignment position of the front and back waist circumferences after folding, cutting the waist tapes flatly, and attaching them to the front waist circumference in a positioned manner;

[0087] S5. Laminating the outer clothing layer with the absorbent body layer:

[0088] Performing a flat cut on the inner layer of the outer clothing and directly attaching the outer layer of the outer clothing on the O-cutting device, applying front and back waist circumference rubber bands, folding back the outer layer of the outer clothing, performing a dotted cut, folding in half to align the front and back waists of the product, attaching the left and right waist tapes, performing an ultrasonic one-piece welding cut on the side waist circumferences, then making the waist circumferences wrap inwards left and right through a turning wheel, folding the product in half, and conveying it through a belt to a small packet that has been sprayed with sealing glue, and performing a transverse seal and a cutting with a cutter to obtain the daily-use panty sanitary napkin.

[0089] Testing the waist circumference of the daily-use panty sanitary napkin in Example 3, and the experimental data obtained are shown in Table 3.

[0090] Table 3

[0091]

[0092] The test data in Table 3 show that the waist circumference elasticity of the daily-use panty sanitary napkin prepared in Example 3 reaches the upper limit.

[0093] Example 4

[0094] A daily-use panty sanitary napkin, comprising a sanitary napkin body. The sanitary napkin body includes an absorbent body and an outer garment layer disposed outside the absorbent body. The absorbent body is defined as having an absolute longitudinal direction along the length direction and an absolute transverse direction along the width direction. The outer garment layer is divided into a front piece and a rear piece with the narrowest line of the crotch as the dividing line. The absorbent body includes a liquid-permeable surface layer, a transmission layer, an absorbent core, and a liquid-impermeable bottom layer stacked in sequence from top to bottom. The outer garment layer includes a closure system, an outer garment outer layer, an elastic material layer, and an outer garment inner layer stacked in sequence from outside to inside; in the absolute longitudinal direction, the sanitary napkin body is divided into a front waist circumference area - a front waist and abdomen circumference area - a crotch area - a rear hip circumference area - a rear side waist circumference area - a rear waist circumference area, and the transverse elasticity of the rear waist circumference area > the transverse elasticity of the front waist circumference area > the transverse elasticity of the front waist and abdomen circumference area ≥ the transverse elasticity of the rear side waist circumference area > the transverse elasticity of the rear hip circumference area; the crotch area does not have transverse elasticity but has longitudinal elasticity; the front waist circumference area, the rear waist circumference area, the front waist and abdomen circumference area, and the rear side waist circumference area are all distributed with first spandex filaments with a fineness of 320 dtex, and the front waist circumference area and the rear waist circumference area also have second spandex filaments with a fineness of 940 dtex superimposed thereon at the same time. The rear hip circumference area is distributed with third spandex filaments with a fineness of 940 dtex, and the crotch area is distributed with fourth spandex filaments with a fineness of 940 dtex; the sanitary napkin body has a reusable closure system, which is composed of left and right waist stickers and magic hooks. The front piece and the rear piece are connected to the closure system, and the front piece and the rear piece are sealed by left and right side seals on both sides. Dotted cuts are provided on the front piece near the left and right side seals. The left and right 20 mm of the dotted cuts have dotted cut elastic reduction pressure points. The dotted cuts and the elastic reduction pressure points penetrate or partially penetrate the front piece, and the left and right waist stickers have reinforced embossing; the length of the magic hook < the length of the left and right waist stickers, and the width of the magic hook < the width of the left and right waist stickers.

[0095] Wherein, an outer garment middle outer layer is further provided between the outer layer of the outer garment and the elastic material layer, and an outer garment middle inner layer is further provided between the elastic material layer and the inner layer of the outer garment.

[0096] The spacing of the first spandex filaments is 6.5 mm, the spacing of the second spandex filaments is 12.5 mm, the spacing of the third spandex filaments is 35.0 mm, and the spacing of the fourth spandex filaments is 25.0 mm.

[0097] The liquid-permeable surface layer is an ultrasonic composite three-dimensional surface layer, and the transmission layer is a long-acting antibacterial material.

[0098] The fineness of the elastic material in the elastic material layer > 70 dtex.

[0099] The tensile force of the elastic material distributed along the waist circumference > the tensile force of the elastic material distributed along the side waist circumference.

[0100] The width of the narrowest area in the crotch of the outer clothing layer < the width of the absorbent core layer.

[0101] A preparation method of a daily-use panty-type sanitary napkin, comprising the following steps:

[0102] S1. Laminating the surface layer to the absorbent core: Use the lower wrapper to hold the cotton core, cover another upper wrapper on the upper surface of the cotton core, fold the lower wrapper upward in a C shape to form the absorbent core, then perform an R cut on the absorbent core, spray glue on the transfer layer and laminate the liquid-permeable surface layer, and then laminate it with the absorbent core after the R cut to obtain a semi-finished absorbent body with the liquid-permeable surface layer - transfer layer - absorbent core from top to bottom;

[0103] S2. Shaping the absorbent body: Bond the liquid-impermeable bottom layer to the gusset, laminate gusset spandex at the upper end of the gusset, fold the gusset back inward, laminate elastic rubber on the bottom film, and laminate it with the semi-finished absorbent body obtained through step S1 to obtain an absorbent body with the liquid-permeable surface layer - transfer layer - absorbent core - liquid-impermeable bottom layer from top to bottom, and perform a perimeter seal and a flat cut on the absorbent body;

[0104] S3. Shaping the outer clothing layer: Unroll the fine denier spandex, stop automatically during warping and photographing, then unroll the back hip circumference rubber, apply S rubber adhesive to the inner layer of the outer clothing, laminate the fine denier spandex and the back hip circumference rubber to the inner layer of the outer clothing to obtain a semi-finished outer clothing layer; Spray fixative glue on the outer layer of the outer clothing, apply S rubber, and then laminate it with the semi-finished outer clothing layer to obtain a preliminary finished outer clothing layer with the outer layer of the outer clothing, elastic material layer, and inner layer of the outer clothing from top to bottom. Then, cut the S rubber of the preliminary finished outer clothing layer at points, and cut the fine denier spandex at the front and back waist circumferences at points, and then perform an O cut on the outer layer of the outer clothing;

[0105] S4. Attaching the closure system: Press the left and right waist tapes into sunflowers, apply glue and perform short cuts on the magic hooks and then attach them to the left and right waist tapes, press diamond patterns on both the left and right waist tapes and the magic hooks, then perform an S cut on the left and right waist tapes and transfer and convey them to the alignment position of the front and back waist circumferences after folding, perform a flat cut on the waist tapes, and position and attach the front waist circumference;

[0106] S5. Laminating the outer clothing layer and the absorbent core layer:

[0107] After cutting the inner layer of the outer garment flat, directly attach the outer layer of the outer garment on the O-cut device, apply the front and rear waist elastic bands, fold back the outer layer of the outer garment, perform dotted cutting, fold in half to align the front and rear waists of the product, attach the left and right waist stickers, perform ultrasonic integrated welding and cutting on the side waist circumference, then use the indexing wheel to fold the left and right waist circumferences inward, fold the product in half, and convey it to the small packet that has been sprayed with sealing glue through a belt. The small packet is transversely sealed and cut with a cutter to obtain the daily-use panty-shaped sanitary napkin.

[0108] The waist circumference of the daily-use panty-shaped sanitary napkin in Example 4 was tested, and the experimental data obtained are shown in Table 4.

[0109] Table 4

[0110]

[0111] The test data in Table 4 show that the waist circumference elasticity of the daily-use panty-shaped sanitary napkin prepared in Example 4 reaches the lower limit.

[0112] The test methods for the tensile force and recovery force of Example 1, Example 2, Example 3, and Example 4 are as follows:

[0113] (1) Sampling: Cut off the waist elastic band area of the front piece and the rear piece and the area below the side seal.

[0114] (2) Testing: Stretch the specimen along the width direction of the product to the same length as the specimen stretching ratio, and then recover it to the initial length.

[0115] (3) Value taking: Take the force value corresponding to the specimen when it is stretched and recovered to the standard waist circumference size.

[0116] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.

Claims

1. A daily-use panty sanitary napkin, comprising a sanitary napkin body, the sanitary napkin body including an absorbent body and an outer garment layer disposed outside the absorbent body. The absorbent body is defined as having an absolute longitudinal direction along the length direction and an absolute transverse direction along the width direction. The outer garment layer is divided into a front piece and a rear piece with the narrowest line of the crotch as the dividing line. It is characterized in that: The absorber includes a liquid-permeable surface layer, a transfer layer, an absorption core, and an impermeable bottom layer that are stacked in sequence from top to bottom. The outer garment layer includes a closure system, an outer layer of the outer garment, an elastic material layer, and an inner layer of the outer garment that are stacked in sequence from outside to inside. In the absolute longitudinal direction, the sanitary napkin body is divided into a front waist region - a front waist and abdomen region - a crotch region - a rear hip region - a rear side waist region - a rear waist region. The lateral elasticity of the rear waist region > the lateral elasticity of the front waist region > the lateral elasticity of the front waist and abdomen region ≥ the lateral elasticity of the rear side waist region > the lateral elasticity of the rear hip region. The crotch region has no lateral elasticity but has longitudinal elasticity. The front waist region, the rear waist region, the front waist and abdomen region, and the rear side waist region are all distributed with first spandex filaments with a fineness of 70 dtex to 320 dtex. The front waist region and the rear waist region also simultaneously overlay second spandex filaments with a fineness of 620 dtex to 940 dtex. The rear hip region is distributed with third spandex filaments with a fineness of 470 dtex to 940 dtex. The crotch region is distributed with fourth spandex filaments with a fineness of 470 dtex to 940 dtex. The sanitary napkin body has a reusable closure system, which consists of left and right waist tapes and magic hooks. The front sheet and the rear sheet are connected to the closure system. The front sheet and the rear sheet are sealed by left and right side seals. Dotted cuts are provided on the front sheet near the left and right side seals. There are dotted cut elastic elimination pressure points within 20 mm on the left and right of the dotted cut. The dotted cut and the elastic elimination pressure points penetrate or partially penetrate the front sheet. The left and right waist tapes have reinforced embossing. The length of the magic hook < the length of the left and right waist tapes, and the width of the magic hook < the width of the left and right waist tapes.

2. The disposable panty-shaped sanitary napkin according to claim 1, wherein: The waist elasticity comfort coefficient of the sanitary napkin body is 1.1 - 2.

1.

3. The disposable panty-shaped sanitary napkin according to claim 1, wherein: An outer middle layer of the outer garment is further provided between the outer layer of the outer garment and the elastic material layer. An inner middle layer of the outer garment is further provided between the elastic material layer and the inner layer of the outer garment.

4. The disposable panty-shaped sanitary napkin according to claim 1, wherein: The spacing of the first spandex filaments is 1.5 mm to 6.5 mm, the spacing of the second spandex filaments is 2.0 mm to 12.5 mm, the spacing of the third spandex filaments is 5.0 mm to 35.0 mm, and the spacing of the fourth spandex filaments is 2.5 mm to 25.0 mm.

5. The disposable panty-shaped sanitary napkin according to claim 1, wherein: The liquid-permeable surface layer is an ultrasonic composite three-dimensional surface layer, and the transfer layer is a long-acting antibacterial material.

6. The disposable panty-shaped sanitary napkin according to claim 1, wherein: The fineness of the elastic material in the elastic material layer ≥ 70 dtex.

7. The disposable panty-shaped sanitary napkin according to claim 1, wherein: The tensile force of the elastic material distributed along the waist > the tensile force of the elastic material distributed along the side waist.

8. The disposable panty-shaped sanitary napkin according to claim 1, wherein: The width of the narrowest region of the crotch of the outer garment layer < the width of the absorber layer.

9. A preparation method of a daily-use panty sanitary napkin, characterized in that, Including the following steps: S1. Composite the surface layer with the absorption core: Use the lower wrapping layer to hold the cotton core, cover another upper wrapping layer on the upper surface of the cotton core. The lower wrapping layer is folded upward in a C shape to form the absorption core. Then, the absorption core is cut in an R shape. After the transfer layer is sprayed with glue, it is compounded with the liquid-permeable surface layer, and then compounded with the absorption core after being cut in an R shape to obtain a semi-finished absorber with a liquid-permeable surface layer - a transfer layer - an absorption core from top to bottom. S2. Absorbent body forming: The liquid-impermeable bottom layer is attached to the spacer edge, and the spacer-edge spandex is laminated on the upper end of the spacer edge. The spacer edge is folded back inward, and elastic rubber bands are laminated on the bottom film. Then it is laminated with the absorbent body semi-finished product obtained through step S1 to obtain an absorbent body with a liquid-permeable surface layer - transfer layer - absorbent core - liquid-impermeable bottom layer from top to bottom. The absorbent body is peripherally sealed and cut flat; S3. Outer garment layer forming: The fine denier spandex is unrolled, and the warp stop motion by photography is carried out. Then the back hip circumference rubber band is unrolled, and the S rubber band glue is applied to the inner layer of the outer garment. The fine denier spandex and the back hip circumference rubber band are laminated onto the inner layer of the outer garment to obtain a semi-finished outer garment layer. The outer layer of the outer garment is sprayed with fixing glue, and S rubber bands are applied, and then it is laminated with the semi-finished outer garment layer to obtain a preliminary finished outer garment layer with an outer layer of the outer garment, an elastic material layer, and an inner layer of the outer garment from top to bottom. Then the S rubber bands of the preliminary finished outer garment layer are point-cut, and the fine denier spandex at the front and back waist circumferences is point-cut. Then the outer layer of the outer garment is O-cut; S4. Closure system lamination: The left and right waist tapes are embossed, the magic hooks are glued and short-cut and then laminated to the left and right waist tapes. The left and right waist tapes and the magic hooks are both embossed with diamond patterns. Then the left and right waist tapes are S-cut and transferred and conveyed to the alignment position of the front and back waist circumferences after folding. The waist tapes are cut flat and positioned and laminated to the front waist circumference; S5. Lamination of the outer garment layer and the absorbent body layer: The inner layer of the outer garment is cut flat and directly attached to the outer layer of the outer garment on the O-cutting device. The front and back waist circumference rubber bands are applied. The outer layer of the outer garment is folded back, and dotted cutting is carried out. It is folded in half to align the front and back waists of the product, and the left and right waist tapes are laminated. The side waist circumferences are ultrasonically integrally welded and cut. Then through the transfer wheel, the waist circumferences are folded inward on the left and right. The product is folded in half and conveyed by a belt to a small packet that has been sprayed with sealing glue. The small packet is transversely sealed and cut with a cutter to obtain the daily panty-shaped sanitary napkin.

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