Preparation method of leakage-proof paper diaper

Abstract

The invention relates to the technical field of disposable hygienic products, provides a preparation method of a leakage-proof paper diaper, and solves the problem that urine leaks from the back waist or wets bedclothes due to design defects of an existing paper diaper. The method comprises the following steps: preparing an absorption core; preparing a leakage-proof partition edge; s2, placing the product in the step S1 above the PE film, and folding the outer sides of the hydrophobic non-woven fabrics inwards; 3, the product in the step 3 is cut into a complex of single products, the complex is rotated by 90 degrees, and the conveying direction of the complex is still the Y direction; preparing a leakage-proof sticking strip roll; preparing an elastic waist tape, and conveying the elastic waist tape along the Y direction; the anti-leakage joint strip and the elastic waist tape are pressed in the overlapping area; bonding the product in the step S9 with one side of the product in the X direction in the step S4; according to the invention, the prepared absorption core is conveyed by an assembly line and is directly coated by the leakage-proof partition edge, and then one-time slitting is carried out, so that the assembly line is short.

Description

Technical Field

[0001] The invention relates to the technical field of disposable sanitary products, and in particular to a method for preparing a leak-proof diaper. Background Art

[0002] Chinese patent announcement number CN221490434U discloses a leak-proof diaper, including a waterproof base film, a first water absorbent core, strip pleats, a second water absorbent core, a water-soluble film and a third water absorbent core. The first water absorbent core and the strip pleats are both arranged on the waterproof base film, the second water absorbent core is arranged on the strip pleats, the water-soluble film covers the strip pleat openings, a space for urine to flow is formed between the second water absorbent core and the water-soluble film, the third water absorbent core is arranged on the left and right sides of the waterproof base film, the surface of the third water absorbent core is wrapped with a waterproof film and the third water absorbent core is connected to the second water absorbent core, and the diaper is provided with a first water absorbent core, a second water absorbent core and a third water absorbent core.

[0003] According to the structure of existing pants-type diapers, there are two main parts to prevent side leakage. One is to set elastic bands on the clothing layer around the through holes for the legs to pass through, and the contraction of the elastic bands drives the clothing layer to form a tightened state so that it adheres to the skin; the other is the anti-side leakage partition on the absorbent body. This application increases the water absorption of the diaper by setting the first absorbent core, the second absorbent core and the third absorbent core to achieve the purpose of leakage prevention. When the diaper is used at night, the discharged urine will be preferentially directed to the back area of ​​the diaper. When the discharge volume is large, the urine cannot be completely absorbed when it flows to the back waist, and will flow out of the diaper from the back waist to leak out, or spread to the back waist and wet the bedding. Summary of the invention

[0004] Therefore, in view of the above problems, the present invention provides a method for preparing a leak-proof diaper, which solves the problem that urine leaks out at the back waist or wets bedding due to design defects of existing diapers.

[0005] To achieve the above object, the present invention is achieved through the following technical solutions:

[0006] A method for preparing a leak-proof diaper comprises the following steps:

[0007] S1. preparing an absorbent core;

[0008] S2. Preparation of leak-proof partitions:

[0009] a. Take the pre-produced roll PE film and unwind it and transport it on the assembly line. The conveying direction is the Y direction, and the direction perpendicular to the Y direction is the X direction;

[0010] b. Spray glue on both sides of the PE film to form glue spraying areas on both sides of the PE film;

[0011] c. Take the pre-made rolled hydrophobic non-woven fabric and unroll it on both sides of the PE film, the projection of one side of each hydrophobic non-woven fabric and the PE film in the vertical direction has an overlapping area, and each glue spraying area is located in the overlapping area;

[0012] d. Bonding one side of each hydrophobic non-woven fabric to the PE film;

[0013] e. Compounding leak-proof elastic band on the other side of each hydrophobic non-woven fabric;

[0014] S3, placing the product of step S1 on the PE film, and folding the outer sides of each hydrophobic non-woven fabric inward;

[0015] S4, cutting the product of step S3 into a composite of individual products, and rotating it 90°, with the conveying direction still in the Y direction;

[0016] S5, preparing leak-proof sticker roll;

[0017] S6, preparing an elastic waist patch, and conveying the elastic waist patch along the Y direction;

[0018] S7, unwinding the leak-proof tape prepared in advance on one side of the elastic waist tape in the X direction, so that the projections of the leak-proof tape and the elastic waist tape in the vertical direction have an overlapping area;

[0019] S8, pressing the leak-proof tape and the elastic waist tape together in the overlapping area;

[0020] S9, spraying glue on one side of the elastic waist tape;

[0021] S10, bonding the product of step S9 to one side of the product of step S4 in the X direction.

[0022] Furthermore, in step S3, the pre-produced rolled hydrophilic non-woven fabric is unrolled and the hydrophilic non-woven fabric is covered on the top of the product in step S1.

[0023] Further, step S1 of preparing the absorbent core comprises:

[0024] f. Preparing an absorbent core composed of a mixture of pulp fibers and a high molecular weight water-absorbing resin or a bulky nonwoven fabric with a high molecular weight water-absorbing resin added thereto;

[0025] g. Wrap or cover the upper surface and / or lower surface of the product in step a with toilet paper or non-woven fabric.

[0026] Furthermore, in step S5: the leak-proof sticker is rolled up by hot pressing several layers of leak-proof non-woven fabric.

[0027] Furthermore, in step S6: the elastic waist patch is composed of a single-layer skin-friendly non-woven fabric with a plurality of waist elastic bands arranged on one side, or is composed of a double-layer waist patch non-woven fabric with a plurality of waist elastic bands sandwiched therebetween.

[0028] Further, it further includes step S11: opening a notch on the side of the product in the X direction away from the elastic waistband.

[0029] Further, in step S7: the overlapping area width of the leak-proof sticker strip and the elastic waistband in the vertical direction projection is 10 mm - 30 mm.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. In the present invention, the prepared absorbent core is directly wrapped by the leak-proof side edge through pipeline transportation, and then undergoes a single slitting, with a short pipeline.

[0032] 2. The formed leak-proof side edge of the present invention includes a PE film for bottom leak-proof, making the bottom leak-proof and side leak-proof of the diaper integrated, with good leak-proof effect.

[0033] 3. In the present invention, after pre-preparing the elastic waistband and then compounding the leak-proof sticker strip roll, it is bonded to one side of the product in the X direction in step S4. The diaper prepared in this way has better wrapping property at the waist. And since the leak-proof sticker strip and the elastic waistband are connected in a pressing form instead of spray gluing, the diaper prepared also has good air permeability at the leak-proof sticker strip. In the case of a large urine output when lying flat at night, since only part of the leak-proof sticker strip is pressed against the elastic waistband, the urine guided to the rear waist area will be blocked between the leak-proof sticker strip and the absorbent core. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is the preparation flow chart of the embodiment of the present invention;

[0035] Figure 2 is the schematic cross-sectional structure diagram of the absorbent core of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will specifically describe the embodiments of the present invention in detail, so as to fully understand how the present invention uses technical means to solve technical problems and achieve the implementation process of technical effects and implement accordingly.

[0037] Embodiment

[0038] As Figures 1 to 2 shown, a preparation method of a leak-proof diaper includes the following steps:

[0039] S1. Prepare the absorbent core 1;

[0040] S2. Prepare the leak-proof side edge 2:

[0041] a. Take the pre-produced roll PE film 21 and unwind it and transport it on the assembly line, the conveying direction is the Y direction, and the direction perpendicular to the Y direction is the X direction;

[0042] b. Spraying glue on both sides of the PE film 21 to form glue spraying areas 23 on both sides of the PE film 21;

[0043] c. Take the pre-made rolled hydrophobic non-woven fabric 22 and roll it on both sides of the PE film 21, so that the projection of one side of each hydrophobic non-woven fabric 22 and the PE film 21 in the vertical direction has an overlapping area, and each glue spraying area 23 is located in the overlapping area;

[0044] d. bonding one side of each hydrophobic non-woven fabric 22 to the PE film 21;

[0045] e. Compounding a leak-proof elastic band 24 on the other side of each hydrophobic non-woven fabric 22;

[0046] S3, placing the product of step S1 on top of the PE film 21, and folding the outer sides of each hydrophobic non-woven fabric 22 inward; unwinding the pre-produced rolled hydrophilic non-woven fabric 3, covering the hydrophilic non-woven fabric 3 on top of the product of step S1, and bonding both sides of the hydrophilic non-woven fabric 3 to the PE film 21;

[0047] S4, cutting the product of step S3 into a composite body 4 of individual products, and rotating it 90°, with the conveying direction still in the Y direction;

[0048] S5. Prepare 5 rolls of leak-proof stickers;

[0049] S6, preparing an elastic waist patch 6, and conveying the elastic waist patch 6 along the Y direction;

[0050] S7, rolling the pre-prepared leak-proof tape 5 on one side of the elastic waist patch 6 in the X direction and unwinding it, so that the projections of the leak-proof tape 5 and the elastic waist patch 6 in the vertical direction have an overlapping area;

[0051] S8, pressing the leak-proof tape 5 and the elastic waist tape 6 together in the overlapping area;

[0052] S9, spraying glue on one side of the elastic waist patch 6;

[0053] S10, bonding the product of step S9 to one side of the product of step S4 in the X direction.

[0054] Step S1 of preparing the absorbent core 1 comprises:

[0055] f. preparing in advance an absorbent core 11 made of a mixture of pulp fibers and a polymer absorbent resin or a bulky nonwoven fabric with a polymer absorbent resin added thereto;

[0056] g. Cover the upper and lower surfaces of the product in step f with toilet paper 12.

[0057] In step S5 , the leak-proof strip 5 is formed by rolling two layers of leak-proof non-woven fabrics 51 by heat pressing, and the leak-proof non-woven fabrics 51 are made of hydrophobic non-woven fabrics.

[0058] In step S6: the elastic waist patch 6 is composed of a double layer of waist patch non-woven fabric 61 sandwiched with four waist elastic bands, and the waist patch non-woven fabric 61 is made of skin-friendly non-woven fabric.

[0059] The process also includes step S11: in step S10, a notch 7 is formed on the side of the product in the X direction away from the elastic waist patch 6; when the product is worn, the notch 7 corresponds to the position of the abdominal muscle eye of the human body to avoid friction on the abdominal muscle of infants and young children.

[0060] In step S7: the width of the overlapping area between the leak-proof sticker 5 and the elastic waist sticker 6 projected in the vertical direction is 20 mm.

[0061] In step e, compounding the leak-proof elastic band 24 on the other side of the hydrophobic non-woven fabric 22 includes the following steps:

[0062] The pre-prepared leakproof elastic band 24 is rolled on the hydrophobic non-woven fabric 22, unrolled and transported;

[0063] Dispense glue at a fixed distance above the leak-proof rubber band 24;

[0064] The hydrophobic nonwoven fabric 22 is folded to cover the leakproof elastic band 24, and the leakproof elastic band 24 and the hydrophobic nonwoven fabric 22 are fixed to each other, and then the compounding is completed.

[0065] The product of step S10 is cut into pieces to obtain a diaper product 8.

[0066] Between step S3 and step S4, the two sides of the step S3 product should also be cut to form an arc-shaped notch corresponding to the leg; at the same time, before the step S3 product is cut, Velcro ear stickers should be glued to both sides of the S3 product at intervals. The above two steps are existing technologies and will not be repeated here.

[0067] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A method for preparing a leak-proof diaper, characterized in that: The following steps are involved: S1. preparing an absorbent core; S2. Preparation of leak-proof partitions: a. Take the pre-produced roll PE film and unwind it and transport it on the assembly line. The conveying direction is the Y direction, and the direction perpendicular to the Y direction is the X direction; b. Spray glue on both sides of the PE film to form glue spraying areas on both sides of the PE film; c. Take the pre-made rolled hydrophobic non-woven fabric and unroll it on both sides of the PE film, the projection of one side of each hydrophobic non-woven fabric and the PE film in the vertical direction has an overlapping area, and each glue spraying area is located in the overlapping area; d. Bonding one side of each hydrophobic non-woven fabric to the PE film; e. Compounding leak-proof elastic band on the other side of each hydrophobic non-woven fabric; S3, placing the product of step S1 on the PE film, and folding the outer sides of each hydrophobic non-woven fabric inward; S4, cutting the product of step S3 into a composite of individual products, and rotating it 90°, with the conveying direction still in the Y direction; S5, preparing leak-proof sticker roll; S6, preparing an elastic waist patch, and conveying the elastic waist patch along the Y direction; S7, unwinding the leak-proof tape prepared in advance on one side of the elastic waist tape in the X direction, so that the projections of the leak-proof tape and the elastic waist tape in the vertical direction have an overlapping area; S8, pressing the leak-proof tape and the elastic waist tape together in the overlapping area; S9, spraying glue on one side of the elastic waist tape; S10, bonding the product of step S9 to one side of the product of step S4 in the X direction.

2. The method for preparing a leak-proof diaper according to claim 1, characterized in that: In step S3, the pre-produced rolled hydrophilic non-woven fabric is unrolled and the hydrophilic non-woven fabric is covered on the top of the product in step S1.

3. The method for preparing a leak-proof diaper according to claim 1, characterized in that: Step S1 of preparing the absorbent core comprises: f. Preparing an absorbent core composed of a mixture of pulp fibers and a high molecular weight water-absorbing resin or a bulky nonwoven fabric with a high molecular weight water-absorbing resin added thereto; g. Wrap or cover the upper surface and / or lower surface of the product in step a with toilet paper or non-woven fabric.

4. The method for preparing a leak-proof diaper according to claim 1, characterized in that: In step S5: the leak-proof sticker is rolled up by hot pressing several layers of leak-proof non-woven fabric.

5. The method for preparing a leak-proof diaper according to claim 1, characterized in that: In step S6: the elastic waist patch is composed of a single-layer skin-friendly non-woven fabric with a plurality of waist elastic bands arranged on one side, or a double-layer waist patch non-woven fabric with a plurality of waist elastic bands sandwiched therebetween.

6. The method for preparing a leak-proof diaper according to claim 1, characterized in that: The step S11 is also included: a notch is formed on the side of the product in the X direction away from the elastic waist patch in step S10.

7. The method for preparing a leak-proof diaper according to claim 1, characterized in that: In step S7: the width of the overlapping area between the leak-proof tape and the elastic waist tape projected in the vertical direction is 10 mm-30 mm.

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