The application is an invention patent with the application number: 2022101725239, the application date is 2022.02.24, and the patent name is: a three-dimensional pants-type sanitary towel containing crotch extension piece and its preparation method are disclosed.
Disclosure of Invention
Therefore, the invention provides a three-dimensional pants-type sanitary towel with crotch extension sheets and a preparation method thereof, aiming at the problems that the pants-type sanitary towel in the prior art has a crotch clamping phenomenon, is easy to leak sideways and is uncomfortable to wear.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the crotch-free trousers type sanitary towel comprises an outer clothes layer and an absorber fixedly connected with the outer clothes layer, and further comprises a crotch extension piece, wherein the outer clothes layer is defined to have a longitudinal direction along the length direction and a transverse direction along the width direction, the outer clothes layer is composed of a front waist-abdomen circumference, a front abdomen-hip circumference, a front leg circumference, a crotch extension piece, a rear leg circumference, a rear abdomen-hip circumference and a rear waist-abdomen circumference which are sequentially connected along the longitudinal direction, the front waist-abdomen circumference, the front abdomen-hip circumference and the front leg circumference are sequentially connected along the longitudinal direction respectively to form a front piece, the rear waist-abdomen circumference, the rear abdomen-hip circumference and the rear leg circumference are sequentially connected along the longitudinal direction respectively to form a rear piece, the front piece and the rear piece are cut into crotch cuts at the center of the crotch, three crotch cut lines which are not in a straight line with angles are arranged at the cuts, the front part sheet and the rear part sheet after cutting the crotch notch line are provided with left and right trouser legs, the left and right trouser legs of the front part sheet and the rear part sheet are respectively turned upwards to enable the first crotch notch line, the second crotch notch line and the third crotch notch line to be positioned on the same straight line after turning, the crotch extension sheet is fixedly connected at the crotch first notch line, the crotch second notch line and the crotch third notch line positioned on the same straight line, the front part sheet is provided with a front left turning sheet and a front right turning sheet after turning, the rear part sheet is provided with a rear left turning sheet and a rear right turning sheet after turning, the crotch extension sheet is fixedly connected with the front left turning sheet and the front right turning sheet at least partially adhered at the overlapping position in the transverse direction, the crotch extension sheet is at least partially bonded with the rear left tuck flap and the rear right tuck flap at overlapping positions in the transverse direction.
Further: the length of the crotch extension piece is more than or equal to 20mm, and the width is more than or equal to 10mm.
A preparation method of a crotch-free trousers-type sanitary towel comprises the steps of manufacturing an outer clothing layer, manufacturing a crotch extension piece, manufacturing an absorber and compounding the outer clothing layer, the crotch extension piece and the absorber into a whole and then cutting the whole into single articles, wherein the specific preparation steps are as follows: (1) making an outer garment layer: defining an outer garment layer having a longitudinal direction along a length direction and a transverse direction along a width direction, the outer garment layer being comprised of a front panel and a rear panel;
a. the front piece and the rear piece are cut into crotch cuts at the middle of crotch, and three crotch cut lines which are not on a straight line at an angle are respectively a crotch first cut line, a crotch second cut line and a crotch third cut line at the crotch cuts; the front piece and the rear piece after the crotch notch is cut are provided with left and right trouser legs;
b. the left trouser leg and the right trouser leg of the front part sheet and the rear part sheet are respectively turned upwards, so that a first crotch notch line, a second crotch notch line and a third crotch notch line are positioned on the same straight line after turning over, and the turned over parts are tightly attached to leg surrounding areas through negative pressure adsorption and light pressure process point fixation; after light hot pressing fixation, the composite strength of the bonding surface of the material is 100gf,1 gf=0.01N;
the front piece is provided with a front left folding piece and a front right folding piece after being folded, and the rear piece is provided with a rear left folding piece and a rear right folding piece after being folded;
(2) Manufacturing a crotch extension piece;
(3) B, conveying the crotch extension piece to the crotch notch area of the front piece treated in the step b, and enabling the crotch extension piece to be fixedly connected with the crotch first notch line, the crotch second notch line and the crotch third notch line which are positioned on the same straight line; the rear crotch extension sheet is fixedly connected with the front left folding sheet and the front right folding sheet, and the overlapping parts are at least partially adhered;
(4) C, linearly transmitting the rear part sheet processed in the step b to the front part sheet processed in the step 3 and fixed with the crotch extension sheet, so that the crotch extension sheet is fixedly connected with a crotch first notch line, a crotch second notch line and a crotch third notch line at the crotch of the rear part sheet; the rear crotch extension sheet is fixedly connected with the rear left folding sheet and the rear right folding sheet, and the overlapping parts are at least partially adhered in the transverse direction; the leg surrounding areas of the front sheet and the rear sheet after being compounded are overlapped in the longitudinal direction;
(5) Manufacturing an absorber, gluing the bottom layer of the absorber, and transmitting the absorber to the outer garment layer on line to be fixedly connected with the outer garment layer;
(6) Folding the combined outer clothing layer, the absorber and the crotch extension piece along the longitudinal center line, aligning the left and right trouser leg folding parts of the crotch, and aligning the front piece and the rear piece of the outer clothing layer;
(7) The two lateral sides of the outer clothing layer are welded and fixed, and then are cut into single articles.
Further: in the step (3), the crotch extension piece is fixedly connected at the crotch notch line position through hot melt adhesive or mechanical hot pressing compounding or ultrasonic compounding or laser compounding.
Further: in the step (4), the rear part sheet and the crotch extension sheet are fixedly connected through hot melt adhesive or mechanical hot pressing compounding or ultrasonic compounding or laser compounding.
Further: and (7) welding and fixing the two lateral sides of the outer garment layer through hot melt adhesive or mechanical hot pressing compounding or ultrasonic compounding or laser compounding.
Further: the front waist and the rear waist are both formed by compounding hot air non-woven fabrics and elastic spandex yarns or spun-bonded non-woven fabrics with the elastic spandex yarns, the circumference of the front waist and the rear waist is 500-1800mm after the front waist and the rear waist are unfolded, the number of the elastic spandex yarns is at least 2, the thickness of the elastic spandex yarns is 200-110dtex, the gaps among the elastic spandex yarns are 2-12mm, and the stretch ratio of the elastic spandex yarns is 1.5-5.5.
Further: the front abdominal and the back hip are formed by compounding elastic spandex filaments and hot air non-woven fabrics or elastic spandex filaments and spun-bonded non-woven fabrics, the circumference is 800-2400mm after the front abdominal and the back hip are completely unfolded, the number of the elastic spandex filaments is at least 2, the thickness of the elastic spandex filaments is 200-1100dtex, the gaps among the elastic spandex filaments are 2-20mm, and the stretch ratio of the elastic spandex filaments is 1.5-8.0; when the elastic material of hip circumference is elastic non-woven fabric, the stretch ratio of the elastic non-woven fabric is 1.2-4.
Further: the front leg periphery and the rear leg periphery are formed by compounding elastic non-woven fabrics, elastic spandex filaments, hot air non-woven fabrics or elastic non-woven fabrics, elastic spandex filaments and spun-bonded non-woven fabrics, the perimeter is 300-1000mm after the front leg periphery and the rear leg periphery are completely unfolded, the number of the elastic spandex filaments is at least 2, the thickness of the elastic spandex filaments is 200-110dtex, the gaps among the elastic spandex filaments are 2-25mm, and the stretch ratio of the elastic spandex filaments is 1.5-6.5; the stretch ratio of the elastic non-woven fabric is 1.2-5.5; the elastic non-woven fabric covering or spandex yarn covering leg circumference area of the whole leg circumference area accounts for more than 10%.
By adopting the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the crotch extension piece is additionally arranged in the crotch area, the left leg periphery, the absorption layer and the right leg periphery are sequentially connected from left to right to form the crotch free extension area, the trousers type sanitary towel has a certain extension width in the Z-axis direction of the crotch, and a certain width in the Y-axis direction for connecting the left leg and the right leg.
2. The crotch extension piece is connected with the left trouser leg and the right trouser leg and is also connected with the absorber, so that the trousers type sanitary towel completely accords with the ergonomics, does not generate two crotch, is more comfortable to wear and has more free movement.
3. After the trousers-type sanitary towel is fully unfolded, when the outer clothing layer is fully unfolded, the addition of the circumferences of the two legs is larger than the circumference of the hip and the circumference of the waist, so that the trousers-type sanitary towel is more comfortable to wear.
4. The crotch extension piece material can be customized to have front-back left-right full elasticity according to the product requirement, can have elasticity in a certain direction, can have no elasticity, meets the requirements of different crowds, and has a wide application range.
5. The pants-type sanitary towel can be produced through a full-automatic production line, has high production speed and low finished product cost, is very suitable for women in menstrual period and incontinent adults, and can also be used as a baby diaper or an adult safety pant.
Detailed Description
Example 1
Referring to fig. 1, 2, 5 and 6, a method for manufacturing a crotch-free pantyhose sanitary napkin includes the steps of manufacturing an outer garment layer, manufacturing a crotch extension sheet 1, manufacturing an absorber 2, and combining the outer garment layer, the crotch extension sheet 1 and the absorber 2 into a whole and then cutting the whole into individual articles, wherein the method comprises the following specific manufacturing steps: (1) making an outer garment layer: defining an outer garment layer having a longitudinal direction along a length direction and a transverse direction along a width direction, wherein the outer garment layer is composed of a front waist-abdomen circumference a, a front waist-hip circumference b, a front leg circumference c, a rear leg circumference e, a rear waist-hip circumference f and a rear waist-abdomen circumference g which are sequentially connected along the longitudinal direction, the front waist-abdomen circumference a, the front waist-hip circumference b and the front leg circumference c are sequentially connected along the longitudinal direction to form a front piece, and the rear waist-abdomen circumference g, the rear waist-hip circumference f and the rear leg circumference e are sequentially connected along the longitudinal direction to form a rear piece;
A. the front waist and the rear waist are respectively and independently formed, the front leg and the front hip are integrally formed, the rear leg and the rear hip are integrally formed, the formed front waist and abdomen circumference, front hip circumference and front leg circumference are spliced into a front piece in a online manner, and the rear waist and abdomen circumference, rear hip circumference and rear leg circumference are spliced into a rear piece in a online manner;
B. the front piece and the rear piece are cut into crotch cuts at the center of crotch, three crotch cut lines which are not on the same straight line at an angle are arranged at the crotch cuts, namely a crotch first cut line 11, a crotch second cut line 12 and a crotch third cut line 13, wherein the crotch first cut line 11 is perpendicular to the crotch second cut line 12, and the crotch third cut line 13 is perpendicular to the crotch second cut line 12; the front piece and the rear piece after the crotch notch is cut are provided with left and right trouser legs;
C. the left trouser leg and the right trouser leg of the front part sheet and the rear part sheet are respectively upwards turned over, so that the first crotch notch line, the second crotch notch line and the third crotch notch line are positioned on the same straight line after turning over, the left trouser leg and the right trouser leg of the front part sheet are provided with a first folding line 14 and a second folding line 15, the included angle between the first folding line 14 and the crotch first notch line 11 is 45 degrees, and the included angle between the second folding line 15 and the crotch third notch line 13 is 45 degrees; the folded parts are tightly attached to leg surrounding areas through negative pressure adsorption and light hot pressing fixation, and after the light hot pressing fixation, the composite strength of the bonding surface of the material is 50gf; the front piece is provided with a front left folding piece and a front right folding piece after being folded, and the rear piece is provided with a rear left folding piece and a rear right folding piece after being folded; the light hot pressing is used for assisting the temporary fixing of the edges of the turnover parts, and the light hot pressing points can be damaged when the trouser legs return and do not influence the integrity and the flatness of the materials; an auxiliary clamping roller for realizing rapid and smooth folding is arranged on the folding station; the auxiliary clamping roller is a conventional known device and is not described in detail herein;
D. c, folding the left and right trouser legs of the front piece and the rear piece which are processed in the step C downwards, wherein the width of the folding is larger than 1/2 of the width of the crotch extension piece so as to avoid the front piece and the rear piece from touching when the front piece and the rear piece are simultaneously combined with the crotch extension piece; after the folding, a third folding line 16 and a fourth folding line 17 are formed in the longitudinal direction, wherein the third folding line 16 is distributed on the front sheet, and the fourth folding line 17 is distributed on the rear sheet;
(2) Manufacturing a crotch extension piece; the transverse dimension of the crotch extension piece is the same as that of the crotch opening folded in the step D, namely, in the transverse direction, the top of the crotch extension piece is flush with the front left folding piece and the front right folding piece, and the bottom of the crotch extension piece is flush with the rear left folding piece and the rear right folding piece; the crotch extension piece has a dimension in the longitudinal direction of the distance between the front piece crotch opening top end and the rear piece crotch opening top end (calculated in a state where the front piece and the rear piece are unfolded and not overlapped);
(3) D, conveying the crotch extension sheet to crotch notch areas of the front sheet and the rear sheet processed in the step D, fixedly connecting the crotch extension sheet to crotch first notch lines, crotch second notch lines and crotch third notch lines which are positioned on the same straight line, wherein the crotch extension sheet and the front left folding sheet and the front right folding sheet are provided with linear bonding parts at overlapping positions in the transverse direction, in the embodiment, the overlapping positions are all areas for covering the front left folding sheet and the front right folding sheet, the crotch extension sheet, the rear left folding sheet and the rear right folding sheet are provided with overlapping positions in the transverse direction, and linear bonding parts are all areas for covering the rear left folding sheet and the rear right folding sheet; specifically, the bonding part realizes fixed bonding through hot melt adhesive;
(4) Making an absorber 2, and fixedly connecting the absorber 2 with the garment layer by gluing on the bottom layer of the absorber 2 and transferring the absorber 2 to the garment layer in a wire manner, wherein the absorber 2 spans the front piece, the crotch extension piece and the rear piece in the longitudinal direction;
(5) Folding the combined outer clothing layer, the absorber 2 and the crotch extension piece 1 along the longitudinal center line, aligning the left and right crotch leg folding parts, and aligning the front and rear clothing layers;
(6) The lateral two sides of the outer clothing layer are fixed by ultrasonic welding and then cut into single articles.
The front piece and the rear piece are formed by compounding a first non-woven fabric, an elastic material and a second non-woven fabric from top to bottom.
In this embodiment, the sanitary towel needs to be adsorbed by negative pressure to avoid retraction in the preparation process, and the conveying mechanism is provided with through holes for negative pressure adsorption.
The square pants type sanitary towel of the embodiment has the advantages that the unfolding width of the waist and abdomen surrounding area of the square pants type sanitary towel is 600mm, the unfolding width of the abdomen and hip surrounding area is 700mm, the length and width of crotch extension sheet materials are completely unfolded to be 235mm 90mm, the unfolding width of a single leg surrounding area of the leg surrounding area is 350mm, the elastic material of the waist and abdomen surrounding area is spandex yarn with the fineness of 800D, and the material stretching ratio is 2.5; the elastic material of the hip surrounding area is elastic non-woven fabric, and the material stretching ratio is 2.7; the elastic material of the leg surrounding area is elastic non-woven fabric and elastic spandex yarn, the stretch ratio of the spandex yarn is 3.5, and the stretch ratio of the elastic non-woven fabric is 2.0; the crotch extension sheet was an elastic nonwoven fabric having elasticity in the transverse direction, and the elastic stretch ratio was 3.0. When a consumer wears the product, the three-dimensional panty-type sanitary towel has an extension width of 80-100mm in the Z-axis direction, a crotch width of about 12mm or more in the Y-axis direction and a trouser leg height of 50mm or more in the X-axis direction. The design solves the problems that the crotch is clamped, and the leg is too loose when the waist is too tight.
Example two
Referring to fig. 3, a method for manufacturing a crotch-free pant-type sanitary napkin includes the steps of manufacturing an outer garment layer, manufacturing a crotch extension sheet 1', manufacturing an absorber 2', and combining the outer garment layer, the crotch extension sheet and the absorber into a whole and then cutting the whole into individual articles, wherein the method comprises the following specific manufacturing steps: (1) making an outer garment layer: defining an outer garment layer having a longitudinal direction along a length direction and a transverse direction along a width direction, wherein the outer garment layer is composed of a front waist-abdomen circumference, a front waist-hip circumference, a front leg circumference, a crotch extension piece, a rear leg circumference, a rear waist-hip circumference and a rear waist-abdomen circumference which are sequentially connected along the longitudinal direction, the front waist-abdomen circumference, the front abdomen-hip circumference and the front leg circumference are sequentially connected along the longitudinal direction to form a front piece, and the rear waist-abdomen circumference, the rear abdomen-hip circumference and the rear leg circumference are sequentially connected along the longitudinal direction to form a rear piece;
a. the front waist-abdomen circumference, the front abdomen-hip circumference, the rear waist-abdomen circumference and the rear abdomen-hip circumference are respectively and independently formed, the front leg circumference and the rear leg circumference are respectively and independently formed, or the front leg circumference and the front abdomen-hip circumference are integrally formed, the rear leg circumference and the rear abdomen-hip circumference are integrally formed, and the formed front waist-abdomen circumference, the front abdomen-hip circumference and the front leg circumference are spliced into a front piece on line, and the rear waist-abdomen circumference, the rear abdomen-hip circumference and the rear leg circumference are spliced into a rear piece on line;
b. cutting a crotch notch on the front piece and the rear piece at the middle of the crotch, wherein three crotch notch lines which are not on a straight line at an angle are arranged at the crotch notch, namely a crotch first notch line, a crotch second notch line and a crotch third notch line, wherein the crotch first notch line is perpendicular to the crotch second notch line, and the crotch third notch line is perpendicular to the crotch second notch line; the front piece and the rear piece after the crotch notch is cut are provided with left and right trouser legs;
c. the left trouser leg and the right trouser leg of the front part sheet and the rear part sheet are respectively turned upwards, the first crotch notch line, the second crotch notch line and the third crotch notch line are turned on the same straight line, the turned parts are tightly attached to the leg surrounding area through negative pressure adsorption and light hot pressing fixation, and after the light hot pressing fixation, the combined strength of the material bonding surface is 100gf,1 gf=0.01N;
(2) Manufacturing a crotch extension sheet 1';
(3) C, conveying the crotch extension piece 1' to a crotch notch area of the folded front piece processed in the step c, so that the crotch extension piece is fixedly connected to a crotch first notch line, a crotch second notch line and a crotch third notch line which are positioned on the same straight line; the crotch extension piece 1' is fixedly connected to the crotch notch line position through hot melt adhesive; the rear crotch extension sheet is fixedly connected with the front left folding sheet and the front right folding sheet, and the overlapping parts are at least partially adhered;
(4) C, linearly transferring the pre-folded rear sheet processed in the step c onto the front sheet processed in the step 3 and fixed with the crotch extension sheet, and fixedly connecting the rear sheet and the crotch extension sheet at the crotch notch line position through hot melt adhesive; specifically, the crotch extension piece is fixedly connected with a crotch first incision line, a crotch second incision line and a crotch third incision line at the crotch of the rear piece; the rear crotch extension piece is fixedly connected with the rear left folding piece and the rear right folding piece, and the rear crotch extension piece is provided with an overlapping part in the transverse direction and is partially adhered to the overlapping part; the leg surrounding areas of the front sheet and the rear sheet after being compounded are overlapped in the longitudinal direction;
(5) Making an absorber, and gluing and online transferring the bottom layer of the absorber to the outer garment layer to be fixedly connected with the outer garment layer, wherein the absorber spans the front piece, the crotch extension piece and the rear piece in the longitudinal direction;
(6) Folding the combined outer clothing layer, the absorber and the crotch extension piece along the longitudinal center line, aligning the left and right trouser leg folding parts of the crotch, and aligning the front piece and the rear piece of the outer clothing layer;
(7) The lateral two sides of the outer clothing layer are fixed by ultrasonic welding and then cut into single articles.
The sanitary towel of this embodiment has a waist and abdomen circumference area expansion width of 600mm, a abdomen and hip circumference area expansion width of 700mm, a crotch extension sheet material expansion length and width of 235mm 90mm, a leg circumference area single leg circumference expansion width of 350mm, a waist and abdomen circumference area elastic material of 800D spandex yarn, and a material stretch ratio of 2.5; the elastic material of the hip surrounding area is elastic non-woven fabric, and the material stretching ratio is 2.7; the elastic material of the leg surrounding area is elastic non-woven fabric and elastic spandex yarn, the stretch ratio of the spandex yarn is 2, and the stretch ratio of the elastic non-woven fabric is 1.9; the crotch extension sheet was an elastic nonwoven fabric having elasticity in the transverse direction, and the elastic stretch ratio was 2.0. When a consumer wears the product, the three-dimensional panty-type sanitary towel has an extension width of 80-100mm in the Z-axis direction, a crotch width of about 8mm or more in the Y-axis direction and a trouser leg height of 45mm or more in the X-axis direction. The design solves the problems that the crotch is clamped, and the leg is too loose when the waist is too tight.
Example III
Referring to fig. 4, a method for preparing a crotch-free pant-type sanitary napkin includes the steps of making an outer garment layer, making a crotch extension sheet, making an absorber, and combining the outer garment layer, the crotch extension sheet and the absorber into a whole and then cutting the whole into individual articles, wherein the specific preparation steps are as follows: (1) making an outer garment layer: defining an outer garment layer having a longitudinal direction along a length direction and a transverse direction along a width direction, wherein the outer garment layer is composed of a front waist-abdomen circumference, a front waist-hip circumference, a front leg circumference, a crotch extension piece, a rear leg circumference, a rear waist-hip circumference and a rear waist-abdomen circumference which are sequentially connected along the longitudinal direction, the front waist-abdomen circumference, the front abdomen-hip circumference and the front leg circumference are sequentially connected along the longitudinal direction to form a front piece, and the rear waist-abdomen circumference, the rear abdomen-hip circumference and the rear leg circumference are sequentially connected along the longitudinal direction to form a rear piece;
a. the front waist-abdomen circumference, the front abdomen-hip circumference, the rear waist-abdomen circumference and the rear abdomen-hip circumference are respectively and independently formed, the front leg circumference and the rear leg circumference are respectively and independently formed, or the front leg circumference and the front abdomen-hip circumference are integrally formed, the rear leg circumference and the rear abdomen-hip circumference are integrally formed, and the formed front waist-abdomen circumference, the front abdomen-hip circumference and the front leg circumference are spliced into a front piece on line, and the rear waist-abdomen circumference, the rear abdomen-hip circumference and the rear leg circumference are spliced into a rear piece on line;
b. the front piece and the rear piece are cut into crotch cuts at the center of crotch, three crotch cut lines which are not on a straight line at an angle are arranged at the crotch cuts, namely a crotch first cut line, a crotch second cut line and a crotch third cut line, and the front piece and the rear piece after the crotch cuts are cut are provided with left and right trouser legs;
c. the left trouser leg and the right trouser leg of the front part sheet and the rear part sheet are respectively turned upwards, the first crotch notch line, the second crotch notch line and the third crotch notch line are positioned on the same straight line after turning over, the turned over parts are tightly attached to the leg surrounding area through negative pressure adsorption and light ultrasonic pressure point fixation, and after light ultrasonic pressure point fixation, the combination surface composite strength of the materials is 80gf; the front piece is provided with a front left folding piece and a front right folding piece after being folded, and the rear piece is provided with a rear left folding piece and a rear right folding piece after being folded;
(2) Manufacturing a crotch extension piece; the crotch extension piece is a U-shaped piece, the U-shaped piece is made of elastic materials and comprises an upper extension piece 3, a middle extension piece 4 and a lower extension piece 5;
(3) The front part sheet is conveyed at an upper layer position, the crotch part extending sheet is conveyed at a middle layer position, the rear part sheet is conveyed at a lower layer position, three production lines are synchronously conveyed, the top end of an upper extending sheet 3 of the crotch part extending sheet of the middle layer is fixedly connected with a front left folding sheet of the front part sheet, the bottom end of the upper extending sheet 3 is fixedly connected with a rear left folding sheet, the top end of a lower extending sheet 5 is fixedly connected with a front right folding sheet, and the bottom end of the lower extending sheet 5 is fixedly connected with the rear right folding sheet; obtaining a continuously conveyed garment layer fixedly connected with crotch extension pieces; at this time, the top end of the crotch extension sheet is partially overlapped with the front left folding sheet and the front right folding sheet, and the overlapped parts are fixedly connected through glue, the overlapped area is the whole area covered by the front left folding sheet, in actual production, the size of the covered area can be adjusted according to the need, the overlapped area can be reduced, but at least a small part of overlapped parts are ensured, so that stable adhesion can be realized; likewise, the bottom end of the crotch extension piece is provided with an overlapping part which is fixedly connected with the rear left folding piece and the rear right folding piece through glue;
(4) The garment material layer in the step (3) is transversely folded to enable the front piece, the crotch extension piece and the rear piece to be in a flat-laid state, and leg surrounding areas of the front piece and the rear piece after folding are overlapped in the longitudinal direction; the front piece, the crotch extension piece and the rear piece are adsorbed by negative pressure and conveyed on a conveyor belt;
(5) Manufacturing an absorber, gluing the bottom layer of the absorber, and transmitting the absorber to the outer garment layer on line to be fixedly connected with the outer garment layer;
(6) Folding the combined outer garment layer, the absorber and the crotch extension piece along a longitudinal central line; aligning the front part and the rear part of the outer clothing layer by aligning the folding parts of the left trouser leg and the right trouser leg of the crotch;
(7) The two lateral sides of the outer clothing layer are welded and fixed, and then are cut into single articles.
The sanitary towel of this embodiment has a waist and abdomen circumference area expansion width of 600mm, a abdomen and hip circumference area expansion width of 700mm, a crotch extension sheet material expansion length and width of 235mm 90mm, a leg circumference area single leg circumference expansion width of 350mm, a waist and abdomen circumference area elastic material of 800D spandex yarn, and a material stretch ratio of 2.5; the elastic material of the hip surrounding area is elastic non-woven fabric, and the material stretching ratio is 2.7; the elastic material of the leg surrounding area is elastic non-woven fabric and elastic spandex yarn, the stretch ratio of the spandex yarn is 1.5, and the stretch ratio of the elastic non-woven fabric is 1.2; the crotch extension sheet was an elastic nonwoven fabric having elasticity in the transverse direction, and the elastic stretch ratio was 1.1. When a consumer wears the product, the three-dimensional panty-type sanitary towel has an extension width of 90-110mm in the Z-axis direction, a crotch width of about 10mm or more in the Y-axis direction and a trouser leg height of 30mm or more in the X-axis direction. The design solves the problems that the crotch is clamped, and the leg is too loose when the waist is too tight.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.