Preparation method of front-back leakage-proof large organ waistline elastic pants

Abstract

The invention relates to the field of hygienic products, provides a preparation method of front-back leakage-proof large organ waistline elastic pants, and solves the problems that due to structural design defects, an existing pants type paper diaper is prone to urine leakage, the waistline area is airtight, and the waistline area is prone to being broken. Comprising the following preparation steps that (1) an absorption core is prepared, and the absorption core is provided with a surface layer, an absorption body and a bottom layer which are sequentially arranged in a stacked mode from top to bottom; (2) preparing an outer clothing layer; (3) slitting the absorption core body prepared in the step (1), turning over the absorption core body by 90 degrees on line, and compounding the absorption core body with the outer clothes layer in the step (2) on line; and (4) folding, side sealing and slitting to obtain a single article.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sanitary products, in particular to a preparation method of front and back leakage prevention organ waist elastic pants. BACKGROUND

[0002] Diaper leakage has always been one of the main feedback problems of consumers, and consumers pay more and more attention to the leakage prevention performance of diapers when purchasing diapers. The main reasons for diaper leakage include poor fit, slow absorption speed, and absorption saturation. At present, the vast majority of diaper cores are water-absorbing paper structures, and do not contain fluff pulp and other fast-absorbing materials. High molecular absorption of urine requires time, and when the urine flow rate exceeds the absorption speed of the diaper, leakage problems are prone to occur.

[0003] The existing pant-type diaper generally comprises an absorbent body and an outer clothing layer arranged outside the absorbent body. The pant-type diaper has a front waist and a back waist, and elastic rubber bands are arranged in the front waist and the back waist. The waist area has elasticity and does not have many wrinkles on the surface by applying glue on the rubber band and using a rubber band point breaking process. However, this process not only causes the waist area to be not breathable due to excessive glue application, but also causes the waist area to be prone to hole problems due to the point breaking process of the waist area rubber band.

[0004] Chinese Patent No. 202020441766.4 discloses a leakage prevention pull-up diaper, which comprises an elastic waist and a pull-up diaper body connected to the bottom of the elastic waist. The pull-up diaper body is provided with leg openings on both sides. The pull-up diaper body comprises, from inside to outside, a hot air non-woven fabric layer, a flow guide layer, a liquid absorption core layer, and a liquid separation and air permeation layer. The liquid absorption core layer comprises, in sequence, a first non-woven fabric layer, an elastic fiber layer, and a second non-woven fabric layer. The elastic fiber layer has a porous network structure, and the elastic fiber layer is doped with high water absorption resin particles. The pull-up diaper body is connected with a side leakage prevention ruffle, which is arranged at the leg opening. The pull-up diaper prevents side leakage through the arrangement of the side leakage prevention ruffle, but does not have the functions of preventing front leakage and back leakage due to defects in the structural design. SUMMARY

[0005] Therefore, in view of the above problems, the present application provides a preparation method of front and back leakage prevention organ waist elastic pants, which solves the problems of easy leakage in the front and back of the waist, poor air permeability in the waist area, and easy hole formation in the waist area of the existing pant-type diaper due to defects in the structural design.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a preparation method of front and back leakage prevention organ waist elastic pants, comprising the following preparation steps:

[0007] (1) preparing an absorption core, the absorption core having a surface layer, an absorption body, and a bottom layer arranged in sequence from top to bottom;

[0008] (2) Preparation of the outer garment layer:

[0009] a. The outer layer nonwoven fabric is unwound and transmitted online, and the outer layer nonwoven fabric is defined to have a transverse direction along the transmission direction and a longitudinal direction perpendicular thereto. A first rubber band is arranged downward along the longitudinal direction at a distance of 90-100 mm from the top end of the longitudinal direction of the outer layer nonwoven fabric, and a second rubber band is arranged upward along the longitudinal direction at a distance of 90-100 mm from the bottom end of the longitudinal direction of the outer layer nonwoven fabric;

[0010] b. Online positioning and gluing: positioning and spacing gluing on both sides of the transverse direction where the first rubber band and the second rubber band are arranged, and applying U-shaped glue and inverted U-shaped glue at the top end and the bottom end of the longitudinal direction of the outer layer nonwoven fabric, respectively;

[0011] c. Online compounding of the inner layer nonwoven fabric, the longitudinal length of the inner layer nonwoven fabric is shorter than the longitudinal length of the outer layer nonwoven fabric by 180-200 mm. When compounded, the top end of the longitudinal direction of the inner layer nonwoven fabric is flush with the rubber band at the top end of the longitudinal direction of the outer layer nonwoven fabric, and the bottom end of the longitudinal direction of the inner layer nonwoven fabric is flush with the rubber band at the bottom end of the longitudinal direction of the outer layer nonwoven fabric;

[0012] d. Leg circumference O-shaped cutting to obtain the outer garment layer:

[0013] e. Ultrasonic welding treatment is performed on the area where the first rubber band and the second rubber band are arranged to form welding points, and each welding point is spaced 10-15 mm apart;

[0014] (3) The absorbent core body prepared in step (1) is cut and turned over by 90° online, and is compounded with the outer garment layer of step (2). When compounded, the area of the outer layer nonwoven fabric at the top end of the longitudinal direction without the first rubber band is folded downward and covers the top part of the longitudinal direction of the absorbent body, so that the top part of the longitudinal direction of the absorbent body has a front overlap area with the folded area of the outer layer nonwoven fabric, and the U-shaped glue applied on the outer layer nonwoven fabric is fixedly connected with the top part of the longitudinal direction of the absorbent body. The area of the outer layer nonwoven fabric at the bottom end of the longitudinal direction without the second rubber band is folded upward and covers the bottom part of the longitudinal direction of the absorbent body, so that the bottom part of the longitudinal direction of the absorbent body has a rear overlap area with the folded area of the outer layer nonwoven fabric, and the inverted U-shaped glue applied on the outer layer nonwoven fabric is fixedly connected with the bottom part of the longitudinal direction of the absorbent body;

[0015] (4) Folding, side sealing, and cutting to obtain a single article.

[0016] Further, the welding points are 0.6-1.0 mm wide and 1.5-2.5 mm long.

[0017] Further, the width of the U-shaped glue and the inverted U-shaped glue is 5-10 mm.

[0018] Further, the U-shaped glue and the inverted U-shaped glue are applied on the outer non-woven fabric by intermittent glue spraying.

[0019] Further, the width of the U-shaped glue and the inverted U-shaped glue is 2-6.5 mm.

[0020] Further, in step (3), when the composite is formed, the area of the longitudinal top end of the outer non-woven fabric without the first rubber band is folded downward and covers the longitudinal top of the absorbent body by 10-20 mm, and the area of the longitudinal bottom end of the outer non-woven fabric without the second rubber band is folded upward and covers the longitudinal bottom of the absorbent body.

[0021] Further, in step (3), when the composite is formed, the area of the longitudinal top end of the outer non-woven fabric without the first rubber band is folded downward and covers the longitudinal top of the absorbent body by 10-20 mm, and the area of the longitudinal bottom end of the outer non-woven fabric without the second rubber band is folded upward and covers the longitudinal bottom of the absorbent body.

[0022] By adopting the foregoing technical solutions, the application has the following beneficial effects:

[0023] 1. The preparation method of the front and rear leakage-proof organ waist circumference elastic pants of the application, by adopting the outer non-woven fabric with a longitudinal length longer than that of the inner non-woven fabric, and pre-arranging the first rubber band and the second rubber band on the outer non-woven fabric, applying glue on the transverse sides of the arranged rubber bands but not on other areas, and not performing point breaking treatment on the rubber bands arranged on the absorbent core, the waist circumference overall area is subjected to ultrasonic welding treatment, so that the product waist circumference has an organ structure in appearance, and the softness of the product waist circumference is greatly increased.

[0024] 2. In the application, the U-shaped glue and the inverted U-shaped glue are respectively applied on the longitudinal top end and the longitudinal bottom end of the outer non-woven fabric, so that the elastic pants form a front leakage-proof pocket by the U-shaped glue and the absorbent body at the waist circumference, and form a rear leakage-proof pocket by the inverted U-shaped glue and the absorbent body, thereby effectively preventing excretion from leaking from the front and rear ends of the waist.

[0025] 3. The application only applies glue on the left and right sides of the waist circumference, reduces the amount of waist circumference rubber glue, cancels the waist circumference rubber band point breaking process, improves the waist circumference elasticity of the product, and solves the problem of rubber band point breaking holes. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1is a product structure schematic diagram of the embodiment one of the present application;

[0027] Fig. 2 is a product structure schematic diagram of the embodiment one of the present application;

[0028] Fig. 3 is a structure schematic diagram of the outer layer non-woven fabric part without applying elastic rubber and the inner layer non-woven fabric after folding in the embodiment one of the present application. DETAILED DESCRIPTION

[0029] Embodiment one

[0030] Reference Figs. 1 to 3 A preparation method of a front and back leakage prevention organ waist circumference elastic pants, comprising the following preparation steps:

[0031] (1) preparing an absorbent core, the absorbent core has a surface layer, an absorbent body 9 and a bottom layer which are sequentially stacked from top to bottom;

[0032] (2) preparing an outer clothing layer:

[0033] a, the outer layer non-woven fabric 1 is placed and transmitted online, the outer layer non-woven fabric is defined to have a transverse direction along the transmission direction and a longitudinal direction perpendicular thereto, the first elastic rubber 2 is arranged downward along the longitudinal direction at a distance of 90mm from the longitudinal top end of the outer layer non-woven fabric 1, and the second elastic rubber 3 is arranged upward along the longitudinal direction at a distance of 90mm from the longitudinal bottom end of the outer layer non-woven fabric 1;

[0034] b, online positioning and gluing: positioning and spacing gluing is carried out on the transverse sides of the first elastic rubber 2 and the second elastic rubber 3 to form a transverse first glue layer 4 and a transverse second glue layer 5, respectively, and U-shaped glue 6 and inverted U-shaped glue 7 are applied at the longitudinal top end and the longitudinal bottom end of the outer layer non-woven fabric 1 by means of intermittent gluing;

[0035] c, online compounding of the inner layer non-woven fabric, the longitudinal length of the inner layer non-woven fabric is 180mm shorter than that of the outer layer non-woven fabric 1, when compounding, the longitudinal top end of the inner layer non-woven fabric 8 is flush with the upward 5mm of the topmost elastic rubber of the first elastic rubber 2 of the outer layer non-woven fabric 1, and the longitudinal bottom end of the inner layer non-woven fabric 8 is flush with the downward 5mm of the bottommost elastic rubber of the second elastic rubber of the outer layer non-woven fabric 1;

[0036] d, O-shaped cutting of leg circumference, to obtain an outer clothing layer;

[0037] e, ultrasonic welding treatment is carried out on the area where the first elastic rubber 2 and the second elastic rubber 3 are arranged to form welding points 10, each welding point is spaced 10mm, the welding point is 1.0mm wide and 2mm long;

[0038] (3) cut the absorbent core body prepared in step (1), turn it over 90° on line, and compound it with the outer cover layer of step (2), when compounding, fold the area of the longitudinal top end of the outer layer non-woven fabric 1 which is not provided with the first rubber band downward and cover it with the longitudinal top 10 mm of the absorbent body 9, so that the longitudinal top of the absorbent body 9 and the folded area of the outer layer non-woven fabric have a front overlap area and the U-shaped glue 6 applied on the outer layer non-woven fabric 1 is fixedly connected with the longitudinal top of the absorbent body 9; fold the area of the longitudinal bottom end of the outer layer non-woven fabric 1 which is not provided with the second rubber band 3 upward and cover it with the longitudinal bottom 10 mm of the absorbent body 9, so that the longitudinal bottom of the absorbent body 9 and the folded area of the outer layer non-woven fabric 1 have a rear overlap area and the inverted U-shaped glue 7 applied on the outer layer non-woven fabric 1 is fixedly connected with the longitudinal bottom of the absorbent body 9, specifically, the width of the U-shaped glue 6 and the inverted U-shaped glue 7 is 5 mm, the U-shaped glue has two longitudinal glues and one horizontal glue, the longitudinal dimension of the longitudinal glue is 30 mm, and the horizontal dimension of the horizontal glue is 20 mm wider than the horizontal dimension of the absorbent body;

[0039] (4) fold, side seal and cut to obtain a single article.

[0040] In this embodiment, the elastic pants are fixed at the waist by the U-shaped glue and the absorbent body to form a front leakage-proof pocket, the overlapping part of the front leakage-proof pocket and the absorbent body is provided with the U-shaped glue, and the other areas are not provided with glue, the leakage-proof pocket presents a U-shaped structure, that is, the area surrounded by the U-shaped structure is not provided with glue, so that the waist of this area and the absorbent body are suspended to form a pocket shape, the inverted U-shaped glue is fixed at the rear of the waist of the absorbent body to form a rear leakage-proof pocket, and the setting scheme of the rear leakage-proof pocket is the same as that of the front leakage-proof pocket, the rear leakage-proof pocket is fixed by the inverted U-shaped glue and the absorbent body but the other areas are not provided with glue, so that a pocket shape can be formed, and leakage of excrement from the front and rear ends of the waist is effectively prevented.

[0041] Embodiment Two

[0042] Compared with embodiment one, the U-shaped glue and the inverted U-shaped glue in this embodiment are applied on the outer layer non-woven fabric by the scraping glue method, in step (3), when compounding, fold the area of the longitudinal top end of the outer layer non-woven fabric which is not provided with the first rubber band downward and cover it with the longitudinal top 20 mm of the absorbent body, and fold the area of the longitudinal bottom end of the outer layer non-woven fabric which is not provided with the second rubber band upward and cover it with the longitudinal bottom 20 mm of the absorbent body. Other technical solutions are the same as those of embodiment one.

[0043] Embodiment Three

[0044] Compared with the first embodiment, in the step (3) of the present embodiment, the area of the longitudinal top end of the outer non-woven fabric without the first rubber band is first folded inwardly downward by 30 mm to form a first double-layer non-woven fabric structure, and then the area is further folded inwardly downward to cover the longitudinal top of the absorbent, so that the longitudinal top of the absorbent has a front overlap area with the folded area of the outer non-woven fabric, and the U-shaped glue applied on the outer non-woven fabric is fixedly connected with the longitudinal top of the absorbent; the area of the longitudinal bottom end of the outer non-woven fabric without the second rubber band is first folded inwardly upward by 30 mm to form a second double-layer non-woven fabric structure, and then the area is further folded upwardly to cover the longitudinal bottom of the absorbent, so that the longitudinal bottom of the absorbent has a rear overlap area with the folded area of the outer non-woven fabric, and the inverted U-shaped glue applied on the outer non-woven fabric is fixedly connected with the longitudinal bottom of the absorbent. That is, compared with the first embodiment, the outer non-woven fabric of the present embodiment has a double-layer non-woven fabric structure at the free end of the waistline, and the length of the waistline is 30 mm, so that the leakage prevention effect is improved.

[0045] In addition, in the present application, the longitudinal length of the outer non-woven fabric can be 180-200 mm longer than the longitudinal length of the inner non-woven fabric, and the extra part is the area without the rubber band. By folding the area to cover the absorbent, the longer the longitudinal length is, the larger the area covering the absorbent is, and the shape of the U-shaped glue can also be slightly changed, as long as the top and bottom ends of the absorbent can be fixed. The interval between the ultrasonic welding points is 10-15 mm, the welding point width is 0.6-1.0 mm, and the length is 1.5-2.5 mm. In the above parameter range, the purpose of the present application can be achieved.

[0046] Although the present application is specifically shown and described in connection with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details can be made to the present application without departing from the spirit and scope of the present application as defined in the appended claims, and all such changes are intended to be within the protection scope of the present application.

Claims

1. A method for preparing a front and back leak-proof accordion waistband elastic pant, characterized in that, The preparation steps include the following: (1) Prepare an absorbent core, wherein the absorbent core has a top layer, an absorbent body and a bottom layer stacked from top to bottom; (2) Preparation of outer clothing layer: a. Online unwinding and transmission of the outer nonwoven fabric: The outer nonwoven fabric is defined to have a transverse direction along the transmission direction and a longitudinal direction perpendicular to it. The first elastic band is arranged at intervals along the longitudinal direction downward at a distance of 90-100mm from the top of the longitudinal direction of the outer nonwoven fabric, and the second elastic band is arranged at intervals along the longitudinal direction upward at a distance of 90-100mm from the bottom of the longitudinal direction of the outer nonwoven fabric. b. Online positioning and gluing: Apply gluing at intervals on both sides of the transverse direction where the first and second elastic bands are laid, and apply U-shaped glue and inverted U-shaped glue to the top and bottom longitudinal ends of the outer nonwoven fabric, respectively. c. Online composite inner nonwoven fabric, wherein the longitudinal length of the inner nonwoven fabric is 180-200mm shorter than the longitudinal length of the outer nonwoven fabric. During the composite process, the longitudinal top end of the inner nonwoven fabric is flush with the top of the first elastic band of the outer nonwoven fabric 5-10mm above, and the longitudinal bottom end of the inner nonwoven fabric is flush with the bottom of the second elastic band of the outer nonwoven fabric 5-10mm below. d. Cut the leg circumference in an O-shape to obtain the outer garment layer; e. Ultrasonic welding is performed on the area where the first and second elastic bands are arranged to form welding points, with each welding point spaced 10-15mm apart. (3) Cut the absorbent core obtained in step (1), flip it online by 90°, and combine it online with the outer garment layer in step (2). When combining, fold the area at the top of the outer nonwoven fabric where the first elastic band is not laid downward and cover the top of the absorbent, so that the top of the absorbent and the folded area of ​​the outer nonwoven fabric have a front overlap area and the U-shaped adhesive applied on the outer nonwoven fabric is fixedly connected to the top of the absorbent; fold the area at the bottom of the outer nonwoven fabric where the second elastic band is not laid upward and cover the bottom of the absorbent, so that the bottom of the absorbent and the folded area of ​​the outer nonwoven fabric have a back overlap area and the inverted U-shaped adhesive applied on the outer nonwoven fabric is fixedly connected to the bottom of the absorbent. (4) Fold, seal on the side, and cut to obtain a single item.

2. The method for preparing a front and back leak-proof accordion waist elastic pants according to claim 1, characterized in that: The weld joint is 0.6-1.0 mm wide and 1.5-2.5 mm long.

3. The method for preparing a front and back leak-proof accordion waist elastic pants according to claim 1, characterized in that: The U-shaped adhesive and the inverted U-shaped adhesive are applied to the outer nonwoven fabric by scraping.

4. The method for preparing a front and back leak-proof accordion waist elastic pants according to claim 3, characterized in that: The width of the U-shaped adhesive and the inverted U-shaped adhesive is 5-10mm.

5. The method for preparing a front and back leak-proof accordion waist elastic pants according to claim 1, characterized in that: The U-shaped adhesive and the inverted U-shaped adhesive are applied to the outer nonwoven fabric by intermittent spraying.

6. The method for preparing a front and back leak-proof accordion waist elastic pants according to claim 5, characterized in that: The width of the U-shaped adhesive and the inverted U-shaped adhesive is 2-6.5mm.

7. The method for preparing a front and back leak-proof accordion waist elastic pants according to claim 1, characterized in that: In step (3), during the lamination process, the area at the top longitudinal direction of the outer nonwoven fabric where the first elastic band is not laid is folded downwards and covers the top longitudinal direction of the absorbent by 10-20mm, and the area at the bottom longitudinal direction of the outer nonwoven fabric where the second elastic band is not laid is folded upwards and covers the bottom longitudinal direction of the absorbent by 10-20mm.

8. The method for preparing a front and back leak-proof accordion waist elastic pants according to claim 1, characterized in that: In step (3) during the composite process, the area at the longitudinal top of the outer nonwoven fabric where the first elastic band is not laid is first folded downwards and inwards by 30mm to form a first double-layer nonwoven fabric structure. Then, it is folded downwards and inwards to cover the longitudinal top of the absorbent, so that the longitudinal top of the absorbent and the folded area of ​​the outer nonwoven fabric have a front overlap area and the U-shaped adhesive applied on the outer nonwoven fabric is fixedly connected to the longitudinal top of the absorbent. The area at the longitudinal bottom of the outer nonwoven fabric where the second elastic band is not laid is first folded upwards and inwards by 30mm to form a second double-layer nonwoven fabric structure. Then, it is folded upwards and inwards to cover the longitudinal bottom of the absorbent, so that the longitudinal bottom of the absorbent and the folded area of ​​the outer nonwoven fabric have a rear overlap area and the inverted U-shaped adhesive applied on the outer nonwoven fabric is fixedly connected to the longitudinal bottom of the absorbent.

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