CN115670800A - Elastic film menstrual pants and preparation method thereof - Google Patents

Abstract

The invention relates to the field of disposable sanitary products, and provides elastic film menstrual pants and a preparation method thereof. Menstrual period trousers body most region or whole region have elasticity (remove the position that the piece of cloth body was located), laminate in the human body more, wrapping up nature is better, make human waistline department can not appear the impression, elastic film has a plurality of bleeder vents, the gas permeability is good, improve the poor shortcoming of gas permeability, the comfort level of menstrual period trousers has been improved greatly, be located the waistline non-woven fabrics of piece of cloth body upper strata with traditional trousers formula sanitary towel and get rid of, make the whole more ventilative frivolous of product, it is poor to have solved menstrual period trousers wrapping up nature, it is uncomfortable to dress, the poor technical problem of gas permeability.

Description

A kind of elastic film menstrual pants and preparation method thereof

technical field

The invention relates to the field of disposable sanitary products, in particular to an elastic film menstrual pants and a preparation method thereof.

Background technique

Existing menstrual pants need to use elastic materials for the waist and leak-proof sides. Elastic materials are usually poor in air permeability. Some menstrual pants use elastic elastic bands on the waist to form elastic waistlines. The waist elastics bear all the force of menstrual pants falling. , it is easy to form marks on the waistline, the comfort is poor, and only the elastic waistline is elastic, and there is no elasticity in other places. The folds are rough and elastic, and the other parts are not elastic, and the hand feel is poor.

Contents of the invention

Therefore, in view of the above problems, the present invention proposes an elastic film menstrual pants and a preparation method thereof. It solves the technical problems of poor encapsulation, uncomfortable wearing and poor air permeability of menstrual pants.

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

An elastic film menstrual pants, comprising a menstrual pants body, the menstrual pants body includes an outer clothing layer, a towel body arranged on the outer clothing layer, and the outer clothing layer includes a superimposed outer non-woven fabric and an elastic film 1. Outer and inner non-woven fabric, the elastic film is provided with a plurality of air holes, and the outer clothing layer located on the body of the towel is subjected to ballistic treatment to form an inelastic part.

further:

The quantity of the elastic film is two, and the two elastic films are arranged on the outer non-woven fabric, and the elastic film is not compounded in the middle of the outer non-woven fabric; the number of the outer inner non-woven fabric is one or two , when there is one piece of non-woven fabric for the outer and inner layer, the structure of the non-woven fabric for the outer and inner layer is the same as that of the outer and outer non-woven fabric; when there are two pieces of non-woven fabric for the outer and inner layer, the non-woven fabric for the outer and inner layer corresponds to sheet of elastic film.

The menstrual pants body includes a front area and a rear area, the front area is provided with a front waist, the rear area is provided with a rear waist, and the width of the rear waist is greater than the width of the front waist by more than 20 percent .

The front panel area and the rear panel area take the narrowest width of the menstrual pants body as the dividing line, and the length of the front panel area is 30%-35% smaller than the length of the rear panel area.

The body of the menstrual pants is provided with waist elastic.

The outer layer non-woven fabric, elastic film, and outer inner layer non-woven fabric are embossed by ultrasonic lamination to form multiple large pressure points and multiple small pressure points. Ultrasonic waves can puncture the elastic film to form the breathable Holes, neither the outer non-woven fabric nor the inner non-woven fabric were punched to form holes.

No additional elastic leg material is added, and ultrasonic composite punching is performed directly on the elastic film in the original waist area along both sides of the menstrual pants to form multiple dots, and the elastic leg circumference is formed on the body of the menstrual pants, and the elastic leg circumference is compounded to the outside On the clothing layer, the elastic leg circumference is arranged along both sides of the body of the menstrual pants, X-shaped or two U-shaped. The elastic leg circumference of the X-shaped and two U-shaped settings will perform bullet-proof treatment on the part across the body of the towel. The diameter of the dots is 0.7-1.5mm, the width of the dots is 10-20mm, the distance between the centers of the same row of dots is 4mm, and the distance between the centers of each row of adjacent dots is 3mm.

The present invention also provides a preparation method based on the elastic film menstrual pants described above, comprising the following steps:

(1) Manufacture of towel body:

The front and rear ends of the towel body are R-cut, and the ends are sealed by hot pressing, and the towel body is cut to form a sheet structure;

(2) Manufacturing the outer clothing layer:

b1. Composite the outer non-woven fabric, the elastic film, and the inner non-woven fabric in the first composite mechanism;

b2. The elastic film is perforated by an ultrasonic mechanism. When ultrasonically sealing, only the elastic film is pierced to form air holes, and the outer non-woven fabric and the inner non-woven fabric are not pierced;

b3. The outer clothing layer is located at the position of the towel body and is subjected to bullet elimination treatment through the bullet elimination mechanism, so that the outer clothing layer is not elastic at the position of the towel body;

(3) Fix the towel body on the outer clothing layer through the transfer wheel, and fix it by the glue spraying mechanism;

(4) Fold through the folding mechanism, and the body of the menstrual pants after folding enters at least one conveying mechanism. Stretching under the effect of stretching, the length of the stretched front area is the same as the length of the back area, and the fixing mechanism fixes the connection between the front waist of the front area and the back waist of the back area;

(5) cutting by the first cutter mechanism to form a sheet-shaped menstrual pants body;

The sheet-shaped menstrual pants body includes a front area and a rear area, the front area is provided with a front waist, and the rear area is provided with a rear waist.

further:

In step (3), the elastic leg bands are compounded on the outer clothing layer.

In step (3), cutting is performed by the second cutter mechanism to form a plurality of O-ring structures.

By adopting the aforementioned technical scheme, the beneficial effects of the present invention are:

(1) Most areas of the menstrual pants body of the present invention have elasticity or all areas have elasticity (except where the towel body is located), which fits the human body better and has better wrapping properties. Not only the waistline is stressed, but the overall force is stressed , so that there will be no imprints at the waist of the human body, and the elastic film is provided with air holes, which improves the poor air permeability of the elastic film, and has good air permeability, which greatly improves the comfort of menstrual pants. The non-woven fabric is removed to make the product more breathable and thinner as a whole. It looks integrally formed, and it feels better in texture and higher in grade. After molding, it is recycled and narrowed, which is convenient for packaging and transportation, and prevents the body of menstrual pants from wrinkling, making it more comfortable to wear.

(2) The number of elastic films is two pieces, and no elastic film is set in the middle, which not only saves materials, but also reduces the area of bullet elimination at the outer clothing layer, which saves energy; There is no outer and inner non-woven fabric in the middle, which saves materials;

(3) The waist circumference width of the back panel of the elastic film trousers type sanitary napkin of the present invention is greater than the waist circumference width of the front panel, and the waist circumference width of the back panel is more than 20% wider than the waist circumference width of the front panel. In the front position of the human body, it is 5 to 50mm away from the most prominent point of the hip bone, so that the front piece is kept at the front of the human body when wearing it, so that there will be no foreign body sensation due to the friction of the side seal on the hip bone. The clothing part is cut more so that it does not catch the leg line of the human body, that is, the front leg line (leg line) is higher than the buttock line (the highest point of the buttocks) and the groin line, so there will be no "leg jamming". The rear area is designed to wrap the entire buttocks to the smile line and extend close to the front of the hip bone. When people move, the rear area is stretched to better wrap the buttocks. Calculated on the basis of 360° around the waist circumference of the human body, when the width of the front area = the width of the back area, the angle at which the back area wraps the human body does not exceed 180° when the pant sanitary napkin is worn. The angle at which the back area wraps the human body is greater than 180°. The pant-type menstrual pants of the present invention, when worn, the angle at which the back area wraps the human body is ≥195°. to prevent the exposure of menstrual blood;

(4) Use elastic film as the elastic material. Compared with the traditional spandex yarn as the elastic material, using the elastic film as the elastic material can make the product have high flatness, no obvious wrinkles like spandex yarn, and the force is more uniform , more wrapped and docile, no tightness and better softness;

(5) The body of the menstrual pants is equipped with elastic waist, and the fixing effect at the waist is better;

(6) The leg circumference of ordinary pants-style sanitary napkins uses spandex yarn, but due to the limitation of the process, the spandex yarn can only be arranged along the direction of the waist spandex yarn, and is arranged at a certain distance from the edge of the O-ring (> 2mm) from left to right. ) and across the absorber layer, a full circle of elastic leg circumference cannot be independently formed on the left and right legs. In the present invention, the elastic leg circumference is compounded to the outer clothing layer, the elastic leg circumference is arranged from top to bottom along the O-ring, the elasticity is completely attached along the O-ring, and the left and right leg circumferences are independently formed by an elastic leg circumference (semi-O elastic Leg circumference), which meets the elastic requirements of real underwear crotch leg circumference, will not cause the towel body to be twisted, the product is more comfortable to wear, and is also convenient for product packaging; because the elastic film has the characteristics of elasticity, when worn, the elastic film is affected by As for the lateral tension, since two adjacent round holes block the elastic direction, the elastic force is distributed upward along the distance between the two round holes, so as to achieve the effect of wrapping around the legs and lifting the legs. If the round hole is too large, the risk of tearing the elastic film under the action of stretching will increase; if the round hole is too small, it will not be able to block the elastic direction; The effect of the legs is not good, and the elastic direction is still mainly horizontal. If the distance between the two circular holes is too small, the distribution will be too dense, which will not have the effect of blocking the elastic direction, and will increase the risk of tearing.

(7) Increase the elastic leg circumference to improve the comfort of the legs, the wrapping property is stronger, and it has a lifting effect, the fitting effect is good, and it can better prevent the menstrual blood from being exposed;

(8) R cut the front and rear ends of the towel body, and carry out end sealing treatment with hot pressing to prevent foreign body tingling caused by the end of the towel body rubbing against the skin due to the exposure of the end of the towel body;

(9) Due to the different materials of the non-woven fabric and the elastic film, the outer non-woven fabric and the outer inner non-woven fabric are not pierced, and the elastic film is pierced into air holes. , The non-woven fabric of the outer and inner layer is composited and then punched by an ultrasonic mechanism. The composite outer clothing layer has high thickness and high strength, so that the elastic film will not be damaged when punched;

(10) There is a negative pressure on the conveying mechanism, so that the length of the fabric close to the front area of the conveying structure is the same as that of the rear area, and the length of the front area after cutting is restored, and the length of the waist circumference of the rear area after cutting is greater than that of the front area. The length of the waistline of the front piece of the piece area, so as to realize the rapid production of the assembly line, does not need to be manually compounded after cutting, which saves labor costs and greatly improves production efficiency.

Description of drawings

Fig. 1 is the expanded schematic diagram of embodiment 1 of the present invention;

Fig. 2 is the schematic sectional view of embodiment one;

Fig. 3 is the structural representation of the towel body of embodiment one;

Fig. 4 is a schematic sectional view of the towel body of Embodiment 1;

Fig. 5 is the structural representation of embodiment one;

Fig. 6 is the enlargement figure of embodiment one ultrasonic pressure point;

Fig. 7 is the expanded schematic diagram of embodiment two;

Fig. 8 is the structural representation of embodiment two;

Figure 9 is a schematic structural view of Embodiment 3;

Fig. 10 is a schematic sectional view of embodiment three;

Figure 11 is a schematic structural view of Embodiment 4;

Figure 12 is a schematic structural view of Embodiment 5;

Fig. 13 is the enlarged view of the ultrasonic pressure point of the elastic film in embodiment five at the leg circumference;

Fig. 14 is a schematic structural diagram of Embodiment six;

Fig. 15 is a schematic structural diagram of Embodiment 7;

Fig. 16 is a schematic flow sheet of the production equipment of the present invention;

Fig. 17 is a schematic structural view of the conveying mechanism;

Fig. 18 is a schematic structural view of two conveying mechanisms arranged up and down.

Detailed ways

The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

Embodiment one:

With reference to Fig. 1 to Fig. 6, embodiment one provides a kind of elastic thin film menstrual pants, comprises menstrual pants body 1, and described menstrual pants body 1 comprises outer clothing layer 11, is arranged on the towel body 12 on outer clothing layer 11, described Outer clothing layer 11 comprises the exterior outer layer non-woven fabric 111 that superposes, two elastic films 112, two exterior inner layer non-woven fabrics 113, the outer outer layer non-woven fabric 111 middle part is not provided with elastic film 112 and outer outfit inner layer The non-woven fabric 113, the elastic film 112 is provided with a plurality of ventilation holes, and the outer clothing layer 11 located at the towel body 12 is subjected to ballistic treatment to form an inelastic part. The menstrual pants body 1 includes a front section 13 and a back section 14, the front section 13 is provided with a front waist, the back section 14 is provided with a back waist, and the width of the back waist is greater than the width of the front waist More than 20 percent. The front panel region 13 and the rear panel region 14 take the narrowest width of the menstrual pants body 1 as the dividing line, and the length of the front panel region 13 is 30%-35% smaller than the length of the rear panel region 14 . The outer layer non-woven fabric 111, the elastic film 112, and the outer inner layer non-woven fabric 113 are embossed by ultrasonic bonding to form a plurality of large pressure points 114 and a plurality of small pressure points 115, and the ultrasonic wave can compress the elastic film 112. Punch through to form the air holes, and neither the outer non-woven fabric 111 nor the inner non-woven fabric 113 are punctured to form holes.

The width of the waist circumference of the rear panel can also be greater than the width of the waist circumference of the front panel by less than 20%, but the effect is relatively poor. The width of the waist circumference of the above-mentioned rear panel can also be equal to the width of the waist circumference of the front panel, which is set according to the specific situation.

Above-mentioned front piece area 13 lengths are usually less than back piece area 14 length 30%-35%, also can be other numerical values, above-mentioned front piece area 13 lengths also can be equal to back piece area 14 lengths, but effect is relatively poor, specifically set according to circumstances.

The towel body 12 includes a base film 121, four base film elastics 122, an absorber layer 123, a flow guide layer non-woven fabric 124, a surface layer non-woven fabric 125, and a leak-proof partition 126 arranged sequentially from bottom to top. The leak-proof partition 126 is provided with two partition elastics 127, and the two sides of the towel body 12 are provided with water-repellent and leak-proof partition non-woven fabrics 128.

The above-mentioned exterior and interior layer non-woven fabric 113 can also be one piece, and the exterior exterior and interior layer non-woven fabric 111, this structure increases the material of the exterior and interior layer non-woven fabric 113 in the middle area, but the composite process is relatively simple, and it is specifically set according to the situation .

The above-mentioned large pressure points 114 and small pressure points 115 can form a four-row structure arranged alternately and circularly. The first row is indirect arrangement of large pressure points 114 and small pressure points 115, and the second row is all small pressure points 115. The pressure points are located at Between the first row of large pressure points 114 and small pressure points 115, the third row is the indirect arrangement of large pressure points 114 and small pressure points 115, the position of the pressure points is between the second row of small pressure points 115, and the fourth row is Small pressure point 115, the pressure point position is between the third row of large pressure point 114 and small pressure point 115. The length of the air hole is larger than the width. The large pressure point 114 is 3-5mm long and 0.5-1mm wide, and the two ends are sealed with arcs. The small pressure point 115 is 1-3mm long and 0.5-1mm wide. Seal with an arc.

The above-mentioned large pressure point 114 of the first row corresponds to the small pressure point 115 of the third row, the small pressure point 115 of the first row corresponds to the large pressure point 114 of the third row, and the small pressure point 115 of the second row corresponds to the small pressure point 115 of the fourth row. The small pressure point 115 is set correspondingly; the large pressure point 114 and the small pressure point 115 of the first row, the second row, the third row, and the fourth row can also be set at other positions, and can be partially correspondingly set or not correspondingly set. Set according to the specific situation. The distance between two pressure points in the same row is usually set to 2-4mm, and the distance between two pressure points in the same row is usually set to 1-3mm, and other values can also be used, depending on the situation.

The ventilation holes are divided into four rows to form a mesh elastic region, which can greatly improve the elastic performance of the elastic film 112, making it more elastic, wider in elastic coverage and better in fit. The large pressure point 114 has good air permeability and good stretchability, but the tensile strength is poor, and the small pressure point 115 has relatively poor air permeability and relatively poor stretchability. If the large pressure point 114 is used, the stretchability Large, it may cause leakage or damage to the elastic film 112; if small pressure points 115 are used, the air permeability and stretchability are relatively poor, which affects the comfort and air permeability of the product. The large pressure point 114 and the small pressure point The combination of 115 improves the strength of the elastic film 112 and is not easy to be damaged, and also improves the stretchability, air permeability and comfort of the elastic film 112.

The elastic film 112 is perforated, and the length of the air hole is larger than the width. In this way, due to the effect of lateral stretching, the air hole will become larger and the air permeability of the product will increase, and the embossing will be sealed by ultrasonic The way can make the whole product more breathable and soft.

The above-mentioned towel body 12 may also be of other structures, which are known structures, and will not be repeated here.

The bullet-proof pattern of the above-mentioned outer clothing layer 11 bullet-proof treatment, embossing length 0.7-1mm (preferably 0.86mm), width 0.2-0.3mm (preferably 0.22mm), the distance between two adjacent pressing points of the same row is 2mm, the second The pressure discharge point is located between the two pressure points in the first row, and so on. The embossing length, width, and pressure point spacing of the above-mentioned ballistic elimination pattern can also be other values, which are set according to the specific situation.

Waist elastics can also be set on the above-mentioned menstrual pants body 1, and the fixing effect at the waist is better. The exterior non-woven fabric 111 at the front area 13 is folded inward to cover the front waist elastic, and the exterior non-woven fabric 111 is turned over. The folding width is 40-50mm (preferably 40mm), and there are 4 elastic bands on the front waistline, the stretch ratio is 2.0-3.0 (preferably 2.5), the denier is 600-1100dtex (preferably 800dtex), and they are fixed on the exterior by gluing On the layer non-woven fabric 111, the exterior outer layer non-woven fabric 111 at the rear panel area 14 is folded inwardly to cover the back waist elastic, the outer outfit outer layer non-woven fabric 111 is folded width 50-60mm (preferably 50mm), and the back waist elastic There are 4 ribs in total, the stretch ratio is 2.0-3.0 (preferably 2.5), the denier is 600-1100dtex (preferably 940dtex), fixed on the outer layer non-woven fabric 111 by gluing, the number of the above-mentioned waist elastics It can also be one, two days or even more, or not set, depending on the situation.

Embodiment 1 is an elastic film type, without leg circumference, and not a fully elastic type.

The usage method of embodiment one is:

The menstrual pants of Embodiment 1 adopts the outer clothing layer 11 and the towel body 12 with the elastic film 112 as a whole, and removes the waistline non-woven fabric on the upper layer of the traditional trouser-style sanitary napkin on the towel body 12, so that the whole product is more breathable and thinner, and looks overall One-piece molding, it feels better in texture and higher in grade. Most of the menstrual pants body 1 is elastic (except where the towel body 12 is located), which fits the human body better and has better wrapping properties, not just the waistline. , the overall force, so that no imprints will appear at the waist of the human body, the elastic film 112 has air holes, good air permeability, greatly improving the comfort of menstrual pants, the waist width of the back piece is greater than the waist width of the front piece, the current piece area 13 and the back piece area 14 When wearing after the sealing is completed, the sealing line is in the front position of the human body, and the person drives the rear area 14 to stretch when moving, which better realizes the wrapping property to the buttocks.

Embodiment two:

With reference to Fig. 1 to Fig. 8, the main difference between embodiment two and embodiment one is: the increased elastic leg circumference 15 of embodiment two, its stretch ratio is 1.6-2.0 (preferably 1.8), and width is 10-20mm (preferably 10mm ), combined with the elastic film 112 in the waist area, the outer layer non-woven fabric 111, and the inner layer non-woven fabric 113 through ultrasonic pressing, the embossing pattern is consistent with the waist area, and the elastic non-woven fabric around the legs is located in the outer layer non-woven fabric. Between the woven fabric 111 and the elastic film 112 or between the elastic film 112 and the inner layer of the exterior, it can also be arranged on the non-woven fabric 113 of the inner layer of the exterior, so that the position of the crotch is more close to the body, more comfortable and has the effect of lifting gears and preventing side leakage Performance is better.

The above-mentioned elastic leg circumference 15 can also be provided with other stretch ratios and widths according to specific circumstances.

The above-mentioned elastic leg circumference 15 may have the same structure as the outer clothing layer 11, or may be other elastic fabrics, which may be set according to specific circumstances.

Embodiment 2 is an elastic film type with leg circumference, not a fully elastic type.

Embodiment three:

With reference to Fig. 1 to Fig. 10, the main difference between Embodiment 3 and Embodiment 1 is that the outer clothing layer 11 of Embodiment 3 includes a superimposed exterior outer layer non-woven fabric 111, a piece of elastic film 112, a piece of outer clothing inner layer Non-woven fabric 113, the outer clothing layer 11 is fully covered, and only the outer clothing layer 11 in the area of the towel body 12 is subjected to bullet-eliminating treatment by ultrasonic waves; the elastic performance of embodiment three is better, the wrapping property is stronger, and it is more comfortable to wear, but Consumes materials.

Embodiment 3 is an elastic film type, no leg circumference, and a fully elastic type.

Embodiment four:

Referring to Figures 1 to 11, the main difference between Embodiment 4 and Embodiment 3 is that: Embodiment 4 adds elastic leg circumference 15, which has a better leak-proof effect at the leg circumference, and the crotch position of Embodiment 4 is more close to the body and more comfortable. Comfort has the function of increasing gear, and the performance of preventing side leakage is better.

Embodiment 4 is an elastic film type with leg circumference and a fully elastic type.

Embodiment five:

Referring to Figures 1 to 13, the main difference between Embodiment 5 and Embodiment 2 is that: the elastic leg circumference 15 ultrasonically embossed dots 150 are circles with a diameter of 0.7-1.5 mm (preferably 1 mm), and the dots are arranged along the O-shaped Arranged in a circular arc, the width of the arrangement is 10-20mm (preferably 10mm), the innermost pressure point is 2-5mm away from the waist ultrasonic pressure point, the distance between the center of the dots in the same row is 4mm, and the distance between the center of each row of dots 3mm; this structure makes the elastic leg circumference 15 more stretchable along the length direction and more comfortable to wear.

Embodiment six:

Referring to Figures 1 to 14, the difference between Embodiment 6 and Embodiment 1 is that Embodiment 6 adds two elastic leg circumferences 15, and the two elastic leg circumferences 15 are arranged in a U-shape from left to right and span across the body of the scarf. 12, and the position across the absorber layer 123 is subjected to ballistic treatment, the minimum distance between the two U-shaped leg circumferences is 20-40mm, the stretch ratio of the elastic leg circumference 15 is 1.6-2.0, and the width is 10-20mm.

Embodiment seven:

Referring to Figures 1 to 15, the main difference between Embodiment 7 and Embodiment 6 is that the two elastic leg circumferences 15 are from the front left waist of the product to the rear right waist of the product, and from the front right waist of the product to the rear left of the product. The waist is arranged in an x shape, and straddles the absorber layer 123, and the part straddling the absorber layer 123 is subjected to ballistic treatment.

Referring to Figures 1 to 18, the present invention also provides a method for preparing menstrual pants based on the elastic film 112 described above, including the following steps:

(1) Manufacture the towel body 12:

Composite the bottom film 121, four bottom film elastics 122, absorber layer 123, guide layer non-woven fabric 124, surface layer non-woven fabric 125, and leak-proof partitions 126 to form the towel body 12, the front and rear ends of the towel body 12 Carry out R-cut treatment to form an arc-shaped structure, and perform end-sealing treatment by hot pressing, and cut the towel body 12 to form a sheet-like structure;

(2) Manufacturing the outer clothing layer 11:

b1. Composite the outer non-woven fabric 111, the elastic film 112, and the outer inner non-woven fabric 113 in the first composite mechanism 21;

b2. The elastic film 112 is perforated by the ultrasonic mechanism 22. During ultrasonic sealing, only the elastic film 112 is pierced to form air holes, and the outer non-woven fabric 111 and the inner non-woven fabric 113 are not pierced;

b3. The outer clothing layer 11 is located at the position of the towel body 12 and is subjected to bullet elimination treatment through the bullet elimination mechanism 23, so that the outer clothing layer 11 is not elastic at the position of the towel body 12;

(3) the towel body 12 is applied on the outer clothing layer 11 by the transfer wheel 24 and fixed, fixed by the glue spraying mechanism, the elastic leg circumference 15 is compounded on the outer clothing layer 11, and cut by the second cutter mechanism 25, Form multiple O-ring structures;

(4) Turn over by the turning mechanism 26, the menstrual pants body 1 after turning over enters a conveying mechanism 3, and the conveying mechanism 3 is provided with a negative pressure device 34, and the negative pressure device 34 generates a negative pressure for the corresponding front area 13 , the front panel area 13 is stretched under the effect of negative pressure, and the length after the front panel area 13 is stretched is the same as the length of the rear panel area 14. fixed;

(5) Cutting by the first cutter mechanism 27 to form a sheet-shaped menstrual pants body 1 .

The quantity of the above-mentioned conveying mechanism 3 can be one, two, three or even more, and is specifically set according to the situation.

The above-mentioned folding mechanism 26 , the first cutter mechanism 27 , the second cutter mechanism 25 , the first composite mechanism 21 , and the bullet elimination mechanism 23 are known devices, and will not be repeated here.

The above-mentioned ultrasonic mechanism 22 utilizes different materials of fabrics, and the ultrasonic waves of the ultrasonic mechanism 22 form pressure points on the non-woven fabric but do not break through, and can penetrate the elastic film 112 .

In step b1, when the elastic film 112 is two pieces, and the outer and inner layer non-woven fabric 113 is one piece or two pieces, the compounding is a known technology, which will not be repeated here.

When the elastic leg circumference 15 is provided, applying the elastic leg circumference 15 is a known technology, and will not be repeated here.

The above-mentioned elastic film 112 can also be perforated first and then compounded with the outer non-woven fabric 111 and the inner non-woven fabric 113, which can be set according to the specific situation.

When the elastic leg circumference 15 has embossing, it can be realized by an ultrasonic embossing device, which will not be repeated here.

When arranging the waist elastics, applying the waist elastics is a well-known technique, and will not be repeated here.

The above-mentioned R-cutting process is to cut into an arc-shaped structure by a cutter, and the two ends after cutting are hot-pressed.

The above-mentioned fixing mechanism 4 can be an ultrasonic welding mechanism, a hot pressing mechanism or other devices, which are known devices, and will not be repeated here.

The above-mentioned fixing mechanism 4 and the above-mentioned first cutter mechanism 27 can also be integrally formed, and a hot-pressing cutter roller device can be used to perform hot-pressing and cutting at the same time, which is a known device and will not be repeated here.

Referring to Fig. 18, in step (4), the conveying mechanism 3 can adopt at least one pair of structures alternately arranged up and down, that is, adjacent sheet-shaped menstrual pants bodies 1 are arranged oppositely, and this structure can reduce the need for cutting fabrics. The area greatly saves fabrics. If the conveying mechanisms 3 are all arranged on one side, more fabrics need to be cut.

A windshield 35 can be set above or below the conveying mechanism 3, and the windshield 35 is located between the front area 13 and the rear area 14. The windshield 35 can completely block the adsorption force of the conveying mechanism 3 to the rear area 14, so that the rear area The stretching length of 14 is not affected by the negative pressure of the conveying mechanism 3, so that the composite of the front panel area 13 and the rear panel area 14 is more accurate. After the folding mechanism 26 is folded, there is a gap between the front area 13 and the rear area 14 so that the windshield 35 can be inserted between the front area 13 and the rear area 14 .

Described conveying mechanism 3 comprises conveying roller 31, the driving mechanism 32 that drives transmission conveying roller 31 rotations, the conveyer belt 33 that is located on the conveyer roller 31, the negative pressure device 34 that is located in the conveyer belt 33, is provided with on the conveyer belt 33 Multiple negative pressure holes.

The front panel area 13 and the rear panel area 14 of the present invention take the narrowest part of the menstrual pants body 1 as the dividing line, and the length of the front panel area 13 is usually set to 30%-35% less than the length of the rear panel area 14, and can also be other values. Specifically set according to the situation; the length of the front area 13 and the back area 14 can also be equal, at this time, the second cutter mechanism 25 can not be set to pre-cut into an O-ring, and can be cut by the first cutter mechanism 27, this structure Wearing comfort is relatively poor.

The way to eliminate bullets is heat treatment or through special ultrasonic patterns. The heat treatment is to make the elastic non-woven fabric in the 12 area of the towel body lose its elasticity by hot pressing. The principle is that heating destroys the elastic body so that the links between the elastic bodies are Destruction and dissolution, the temperature is 70°C-90°C, the principle of the loss of elasticity of the special ultrasonic pattern is to destroy the connection between the elastomers, the ultrasonic pattern is embossed length 0.7-1mm, width 0.2-0.3mm, two adjacent embossed The point spacing is 2mm, the distance between the second row of pressure points and the first row of pressure points is 0mm, and the second row of pressure points is located between the two pressure points of the first row, and the cycle is repeated in turn.

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

Claims (10)

1. a kind of elastic film menstrual period pants, it is characterized in that: comprise menstrual period trousers body, described menstrual period trousers body comprises outer clothing layer, is located at the towel body on the outer clothing layer, and described outer clothing layer comprises the outer dress outer layer that is superimposedly arranged Non-woven fabric, elastic film, and non-woven fabric for outer and inner layer, the elastic film is provided with a plurality of air holes, and the outer clothing layer located on the body of the towel is subjected to ballistic treatment to form an inelastic part. 2. A kind of elastic film menstrual pants according to claim 1, characterized in that: the quantity of the elastic film is two, and the two elastic films are arranged on the outer layer non-woven fabric, and the middle part of the outer layer non-woven fabric The elastic film is not compounded; the number of the outer non-woven fabric is one or two. When the outer inner non-woven fabric is one piece, the outer inner non-woven fabric structure is the same as the outer outer non-woven fabric. When there are two inner non-woven fabrics, the outer and inner non-woven fabrics respectively correspond to two elastic films. 3. A kind of elastic film menstrual pants according to claim 1, characterized in that: the menstrual pants body includes a front area and a rear area, the front area is provided with a front waist, and the rear area is provided with a rear Waist circumference, the width of the waist circumference of the rear panel is greater than the width of the waist circumference of the front panel by more than 20%. 4. A kind of elastic film menstrual pants according to claim 3, characterized in that: the front panel area and the rear panel area take the narrowest part of the menstrual pants body as the dividing line, and the length of the front panel area is less than the length of the rear panel area by 30 %-35%. 5. The menstrual pants with elastic film according to claim 1, characterized in that: the body of the menstrual pants is provided with an elastic waist. 6. A kind of elastic film menstrual pants according to claim 1, characterized in that: the outer non-woven fabric, the elastic film, and the outer inner non-woven fabric are embossed by ultrasonic lamination to form a plurality of large pressure point and a plurality of small pressure points, the elastic film can be pierced by ultrasonic waves to form the air holes, and neither the outer non-woven fabric nor the inner non-woven fabric of the exterior are pierced to form holes. 7. A kind of elastic film menstrual pants according to claim 1, characterized in that: no additional elastic leg circumference materials are added, and ultrasonic composite punching is performed directly on the elastic film in the original waist area along both sides of the menstrual pants to form multiple Two dots form elastic leg circumferences on the menstrual pants body, and the elastic leg circumferences are compounded on the outer clothing layer. The elastic leg circumferences are arranged along both sides of the menstrual pants body, in an x-shaped configuration or two U-shaped configurations, and the x-shaped configuration and Two U-shaped elastic leg circumferences will be used to eliminate bullets across the body of the towel. The diameter of the dots is 0.7-1.5mm, the width of the dots is 10-20mm, and the distance between the centers of the same row of dots is 4mm. The distance between the centers of adjacent dots is 3mm. 8. A preparation method based on a kind of elastic film menstrual pants according to claim 1, characterized in that: comprising the following steps: (1) Manufacture of towel body: The front and rear ends of the towel body are R-cut, and the ends are sealed by hot pressing, and the towel body is cut to form a sheet structure; (2) Manufacturing the outer clothing layer: b1. Composite the outer non-woven fabric, the elastic film, and the inner non-woven fabric in the first composite mechanism; b2. The elastic film is perforated by the ultrasonic mechanism. When ultrasonically sealing, only the elastic film is pierced to form air holes, and the outer non-woven fabric and the inner non-woven fabric are not pierced; b3. The outer clothing layer is located at the position of the towel body and is subjected to bullet elimination treatment through the bullet elimination mechanism, so that the outer clothing layer is not elastic at the position of the towel body; (3) Fix the towel body on the outer clothing layer through the transfer wheel, and fix it by the glue spraying mechanism; (4) Folding is carried out by the folding mechanism, and the menstrual pants body after the folding enters at least one conveying mechanism, and a negative pressure device is provided on the conveying mechanism, and the negative pressure device generates negative pressure for the corresponding front piece area, and the front piece area is under negative pressure. Stretching under the effect of stretching, the length of the stretched front area is the same as that of the back area, and the fixing mechanism fixes the connection between the front waist of the front area and the back waist of the back area; (5) cutting by the first cutter mechanism to form a sheet-shaped menstrual pants body; The sheet-shaped menstrual pants body includes a front area and a rear area, the front area is provided with a front waist, and the rear area is provided with a rear waist. 9. A method for preparing elastic film menstrual pants according to claim 8, characterized in that: in step (3), the elastic leg wraps are compounded on the outer clothing layer. 10. A method for preparing elastic film menstrual pants according to claim 8, characterized in that: in step (3), cutting is performed by a second cutter mechanism to form a plurality of O-ring structures.

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