Layered tearable sanitary napkin and preparation method and production equipment thereof

Abstract

The present application discloses a stacked tearable sanitary napkin and a preparation method and production equipment thereof, which belong to the field of sanitary products. The stacked tearable sanitary napkin comprises a first absorbent body and a second absorbent body which are fitted and fixedly connected, and a bottom film and a release paper are sequentially arranged on the side of the second absorbent body facing away from the first absorbent body. The preparation method of the stacked tearable sanitary napkin comprises the following steps: cutting the first absorbent continuum into a plurality of first absorbent bodies; fitting the bottom film and the release paper on one side of the second absorbent continuum; transferring the first absorbent body to the side of the second absorbent continuum facing away from the bottom film, leaving a predetermined spacing between adjacent first absorbent bodies; joining and fixing the first absorbent body with the second absorbent continuum; and cutting the second absorbent continuum, the bottom film and the release paper to obtain a stacked tearable sanitary napkin. The present application has the advantage of improving the convenience of use of sanitary napkins.

Description

Technical Field

[0001] The present application relates to the field of sanitary products, and in particular to a laminated tearable sanitary napkin and a preparation method and production equipment thereof. Background Art

[0002] Women often need to use sanitary napkins during their menstrual period. The main functional structure of sanitary napkins is the absorbent core, which is generally composed of non-woven paper, super absorbent resin and fluff pulp. Generally, a self-adhesive layer is set on the back of the sanitary napkin and combined with a release paper. You only need to tear off the release paper and then stick the self-adhesive layer on your underwear to wear and use the sanitary napkin.

[0003] Sanitary napkins are disposable products and must be replaced once they are used or after a certain period of time. If they are not changed for a long time, bacteria will grow or clothes will be soiled. However, due to factors such as job restrictions or emergencies, many people do not have enough time to change sanitary napkins, which makes actual use inconvenient. Summary of the invention

[0004] In order to improve the convenience of using sanitary napkins, the present application provides a stacked tearable sanitary napkin and a preparation method and production equipment thereof.

[0005] In the first aspect, the stacked tearable sanitary napkin provided in the present application adopts the following technical solution:

[0006] The stacked tearable sanitary napkin comprises a first absorbent body and a second absorbent body which are fitted and fixedly connected, and a bottom film and a release paper are sequentially arranged on the side of the second absorbent body which is away from the first absorbent body.

[0007] By adopting the above technical solution, the two absorbent cores are overlapped and combined. When in use, the first absorbent core is used for absorption first, and then the first absorbent core is discarded when replacement is needed. The remaining second absorbent core can continue to be used. Compared with replacing a new sanitary napkin, this method of replacing the absorbent core is faster and more convenient, and there is no need to carry spare sanitary napkins for replacement, which is more convenient.

[0008] Optionally, the size of the first absorbent body is smaller than the size of the second absorbent body.

[0009] By adopting the above technical solution, the size of the first absorbent body is smaller than that of the second absorbent body, so that the user can easily access the connecting gap between the first absorbent body and the second absorbent body, thereby facilitating the replacement operation.

[0010] Optionally, a distance of 8 to 20 mm is left between the long side ends of the first absorbent body and the long side ends of the second absorbent body.

[0011] By adopting the above technical solution, the spacing makes it convenient for the user's fingertips to enter between the first absorbent body and the second absorbent body, and enables the first absorbent body to have a larger absorption area.

[0012] In the second aspect, the method for preparing the laminated tearable sanitary napkin provided in the present application adopts the following technical solution:

[0013] The method for preparing a laminated tearable sanitary napkin comprises the following steps:

[0014] cutting the first absorbent continuum into a plurality of first absorbent bodies;

[0015] Laminating a base film and a release paper on one side of the second absorbent continuum;

[0016] Transferring the first absorbent body to the side of the second absorbent continuum away from the base film so that a predetermined distance is left between adjacent first absorbent bodies;

[0017] Joining and fixing the first absorbent body to the second absorbent continuous body;

[0018] The second absorbent continuum, the base film and the release paper are cut to obtain a laminated tearable sanitary napkin.

[0019] By adopting the above technical solution, during the process of transferring the first absorbent body to the second absorbent continuum, the transfer speed of the first absorbent body and the conveying speed of the second absorbent continuum are controlled to ensure that there is a spacing between adjacent first absorbent bodies, and the spacing meets the preset requirements, which helps to reduce the trouble of readjustment during the subsequent cutting of the finished product.

[0020] In the third aspect, the production equipment of the stacked tearable sanitary napkin provided in the present application adopts the following technical solution:

[0021] The production equipment of laminated tearable sanitary napkins includes:

[0022] a first conveying device for conveying a first absorbent continuum;

[0023] A slitting device, arranged on the first conveying device, and used for slitting the first absorbent continuum into a plurality of first absorbent bodies;

[0024] a second conveying device for conveying a second absorbent continuum;

[0025] A bonding device for bonding the base film and the release paper to the second absorbent continuum;

[0026] A transfer device, disposed between the first conveying device and the second conveying device, the transfer device is used to transfer the first absorbent body to one side of the second absorbent continuum, and to leave a gap between adjacent first absorbent bodies;

[0027] A joining device, provided on the second conveying device, and used for joining and fixing the first absorbent body and the second absorbent continuous body;

[0028] The finished product cutting device is arranged on the second conveying device and is located after the joining device. The finished product cutting device is used for cutting the second absorbent continuum, the bottom film and the release paper.

[0029] By adopting the above technical solution, the absorption continuum refers to a long, rollable absorption core, and the absorption continuum is cut to form an absorption body that meets the size of a single sanitary napkin.

[0030] The present application performs the compounding of the stacked tearable sanitary napkin during the absorbent body forming process. The first absorbent continuum is first cut into a plurality of discontinuous first absorbent bodies, and then preliminarily combined with the second absorbent continuum through a transfer device, so that the forming range of a single sanitary napkin can be predetermined on the second conveying device, which is convenient for the subsequent cutting of the finished product. In addition, it is more convenient to adjust the size difference between the first absorbent body and the second absorbent body, and quickly produce a sanitary napkin finished product with a first absorbent body smaller than the second absorbent body. The purpose of the first absorbent body being smaller than the second absorbent body is to facilitate the user to find the connection gap between the first absorbent body and the second absorbent body, so as to tear out the used first absorbent body and then use the second absorbent body, making the use of the sanitary napkin more convenient and quick, and reducing the number of sanitary napkins that need to be carried and replaced.

[0031] The joining device can strengthen the connection between the first absorbent body and the second absorbent body, thereby improving the overall stability of the sanitary napkin when the first absorbent body is used.

[0032] Optionally, the transfer device includes a moving mechanism and a first adsorption mechanism, the first adsorption mechanism is used to adsorb and fix the first absorbent body and synchronize the movement of the first absorbent body with that of the moving mechanism, the moving mechanism receives the first absorbent body during the movement and drives the first absorbent body to move until the first absorbent body reaches a predetermined position corresponding to the second absorption continuum.

[0033] By adopting the above technical solution, the first absorbent body is synchronized with the movement of the moving mechanism by means of adsorption and fixation, and the short and light first absorbent body is stably transferred to the second absorbent continuum under the movement of the moving mechanism, thereby achieving high production continuity.

[0034] Optionally, the motion mechanism includes a motion roller and a driving assembly, the driving assembly is used to drive the motion roller to rotate, the first adsorption mechanism is arranged inside the motion roller, the cylindrical surface of the motion roller is provided with a plurality of adsorption holes, and the first adsorption mechanism generates negative pressure around the adsorption holes.

[0035] By adopting the above technical solution, when the moving drum rotates, the first adsorption mechanism generates negative pressure around the adsorption hole, which has an adsorption effect on the first absorbent body, so that the first absorbent body is fixed to the cylindrical surface of the moving drum, and the first absorbent body is transferred from one side of the cylindrical surface of the moving drum to the other side, thereby realizing the transfer of the first absorbent body.

[0036] Optionally, there are multiple moving rollers, and the cylindrical surfaces of adjacent moving rollers are adjacent to each other. The moving roller is divided into a negative pressure zone and a normal pressure zone on a radial plane. The cylindrical surface of the moving roller moves relative to the first adsorption mechanism, and the first adsorption mechanism causes the negative pressure zone to generate negative pressure. The boundary between the negative pressure zone and the normal pressure zone is close to the vicinity of the adjacent moving rollers.

[0037] By adopting the above technical scheme, multiple moving rollers cooperate with each other, so that the functions of the multiple moving rollers on the first absorbent body can be divided into receiving, moving and placing, so that the transfer process of the first absorbent body can be further adjusted, which is convenient for adjusting the transfer speed, so that the combination position of the first absorbent body and the second absorbent continuum can be accurately controlled, and the distance between adjacent first absorbent bodies can be accurately controlled. Finally, after the finished product is cut, the distance between the end of the first absorbent body and the end of the second absorbent body in each stacked tearable sanitary napkin product can be kept consistent, ensuring the production speed while improving the production quality; the negative pressure zone and the normal pressure zone are divided in the moving roller, and the first adsorption mechanism remains stationary and the cylindrical surface of the moving roller remains rotating, so that the moving roller generates an adsorption force on the local cylindrical surface. When the first absorbent body reaches the boundary between the negative pressure zone and the normal pressure zone, the first absorbent body will detach from the moving roller due to the loss of adsorption force, and then be adsorbed by the negative pressure zone of the adjacent moving roller, so as to realize the transfer of the first absorbent body between the adjacent moving rollers.

[0038] Optionally, a plurality of drive assemblies are provided, and the plurality of drive assemblies independently drive the plurality of moving rollers to rotate.

[0039] Optionally, the motion mechanism includes a multi-axis linear module, an output end of the multi-axis linear module moves between the first conveying device and the second conveying device, and the first adsorption mechanism is installed at the output end of the multi-axis linear module.

[0040] Optionally, the second conveying device is equipped with a second adsorption mechanism, and the second adsorption mechanism is used to make the first absorbent body fit to the second absorbent continuum.

[0041] By adopting the above technical solution, after the first absorbent body is transferred to the second absorbent continuum, the second adsorption mechanism can maintain the stability of the initial combination of the first absorbent body and the second absorbent continuum, and then keep the two relatively immobile during the subsequent joining and fixing process, thereby improving the quality of joining and fixing.

[0042] Optionally, the joining device is an ultrasonic welding device, and / or the joining device is a hot pressing device.

[0043] By adopting the above technical solution, both ultrasonic welding and hot pressing can achieve the joining and fixing of the first absorbent body and the second absorbent continuum.

[0044] Optionally, the stacked tearable sanitary napkin production equipment further includes a first production device and a second production device, wherein the first production device is used to produce a first absorbent continuum, and the second production device is used to produce a second absorbent continuum.

[0045] By adopting the above technical solution, after the first absorption continuum and the second absorption continuum are formed, the stacked tearable sanitary napkin can be produced quickly, and the continuity and efficiency of production are improved.

[0046] In summary, this application has the following beneficial effects:

[0047] 1. The present application overlaps and combines two absorbent cores. When in use, the first absorbent core is used for absorption first, and then the first absorbent core is discarded when replacement is needed. The remaining second absorbent core can continue to be used. Compared with replacing a new sanitary napkin, this method of replacing the absorbent core is faster and more convenient, and there is no need to carry a spare sanitary napkin for replacement, which is more convenient.

[0048] 2. The present application performs the compounding of the stacked tearable sanitary napkin during the absorbent body forming process. The first absorbent continuum is first cut into a plurality of discontinuous first absorbent bodies, and then preliminarily combined with the second absorbent continuum through a transfer device, so that the forming range of a single sanitary napkin can be predetermined on the second conveying device, which is convenient for the subsequent cutting of the finished product. In addition, it is more convenient to adjust the size difference between the first absorbent body and the second absorbent body, and quickly produce a sanitary napkin finished product with a first absorbent body smaller than the second absorbent body. The purpose of the first absorbent body being smaller than the second absorbent body is to facilitate the user to find the connection gap between the first absorbent body and the second absorbent body, so as to tear out the used first absorbent body and then use the second absorbent body, making the use of the sanitary napkin more convenient and quick, and the number of sanitary napkins required to be carried and replaced is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a planar structural diagram of an embodiment of a stackable tearable sanitary napkin of the present application.

[0050] Figure 2 It is a planar structural diagram of a production equipment embodiment of the present application.

[0051] Figure 3 It is a planar structural diagram of the first conveying device in a production equipment embodiment of the present application.

[0052] Figure 4 It is a planar structural diagram of a second conveying device and a bonding device in a production equipment embodiment of the present application.

[0053] Figure 5 It is a planar structural diagram of a conveying device and a transfer device in a production equipment embodiment of the present application.

[0054] Figure 6 It is a planar structural diagram of the first absorbent body transfer process in a production equipment embodiment of the present application.

[0055] Figure 7 It is a planar structural diagram of a moving roller in a production equipment embodiment of the present application.

[0056] Figure 8 It is a planar structural diagram of a joining device and a finished product cutting device in an embodiment of a production equipment of the present application.

[0057] Fig. 9 It is a planar structural diagram of a bonding device in a production equipment embodiment of the present application.

[0058] Description of reference numerals:

[0059] 1. First absorbent body; 11. Second absorbent body; 12. Base film; 13. Release paper; 14. Second absorbent continuum; 2. First conveying device; 21. Second conveying device; 211. Second adsorption mechanism; 3. First production device; 31. Second production device; 4. Slitting device; 5. Adhesive device; 51. Laminating mechanism; 52. First glue injection mechanism; 53. Second glue injection mechanism; 6. Transfer device; 61. First adsorption mechanism; 611. Negative pressure fan; 612. Exhaust duct; 62. Moving roller; 621. Bottom plate; 622. Roller shaft; 623. Partition plate; 624. Adsorption hole; 63. Negative pressure zone; 64. Normal pressure zone; 7. Joining device; 71. Hot pressing roller; 8. Finished product cutting device. DETAILED DESCRIPTION

[0060] The following is combined with Figure 1-9 This application is described in further detail.

[0061] One embodiment of the present application discloses a layered tearable sanitary napkin. Figure 1 As shown, the stacked tearable sanitary napkin includes a first absorbent body 1 and a second absorbent body 11 which are arranged in close contact with each other. A bottom film 12 and a release paper 13 are sequentially arranged on the side of the second absorbent body 11 facing away from the first absorbent body 1. Both the first absorbent body 1 and the second absorbent body 11 are core bodies with the function of absorbing liquid. The first absorbent body 1 and the second absorbent body 11 are joined and fixed by ultrasonic welding or hot pressing, the second absorbent body 11 and the bottom film 12 are fixed by bonding, and a self-adhesive tape is arranged between the bottom film 12 and the release paper 13.

[0062] When the laminated tearable sanitary napkin is used, the release paper 13 is separated from the bottom film 12, the adhesive on the bottom film 12 is adhered to the underwear, and the first absorbent body 1 is arranged facing the user's private parts. The first absorbent body 1 is used first. When the first absorbent body 1 is used and needs to be replaced, the first absorbent body 1 is separated from the surface of the second absorbent body 11 by tearing. At this time, the second absorbent body 11 is not used and contaminated, and the second absorbent body 11 can continue to be used facing the user's private parts, thereby realizing the rapid replacement of sanitary napkins, and the user does not need to carry spare sanitary napkins for replacement, which is more convenient.

[0063] The size of the first absorbent body 1 is smaller than that of the second absorbent body 11. Specifically, there is a spacing of 8 to 20 mm between the long side ends of the first absorbent body 1 and the long side ends of the second absorbent body 11 on the same side. This spacing facilitates the user's fingertips to enter between the first absorbent body 1 and the second absorbent body 11 and enables the first absorbent body 1 to have a larger absorption area.

[0064] The present application also discloses a method for preparing a laminated tearable sanitary napkin, comprising the following steps:

[0065] Cutting the first absorbent continuum into a plurality of first absorbent bodies 1;

[0066] A base film 12 and a release paper 13 are attached to one side of the second absorbent continuum;

[0067] Transferring the first absorbent body 1 to one side of the second absorbent continuum 14, controlling the transfer speed of the first absorbent body 1 and the conveying speed of the second absorbent continuum 14, so that a predetermined distance is left between adjacent first absorbent bodies 1;

[0068] The first absorbent body 1 is joined and fixedly connected with the second absorbent continuous body 14;

[0069] The second absorbent continuum 14 is cut into pieces to obtain a layered tearable sanitary napkin.

[0070] In order to produce the above-mentioned stacked tearable sanitary napkin, the present application embodiment also discloses a stacked tearable sanitary napkin production device. Figure 2 As shown, the stacked tearable sanitary napkin production equipment includes a first conveying device 2, a second conveying device 21, a slitting device 4, a transfer device 6, a joining device 7 and a finished product cutting device 8.

[0071] like Figure 2 and Figure 3As shown, the first conveying device 2 is used to convey the first absorbent continuum, and the second conveying device 21 is used to convey the second absorbent continuum 14. The first conveying device 2 and the second conveying device 21 can be conveyor belts or roller conveying devices composed of multiple conveyor rollers. The first conveying device 2 and the second conveying device 21 are staggered. The first conveying device 2 can be arranged above, below, to the left or to the right of the second conveying device 21. In this embodiment, the first conveying device 2 is specifically arranged above the second conveying device 21. The absorbent continuum is a long, rollable absorbent core.

[0072] In one embodiment of the present application, the stacked tearable sanitary napkin production equipment also includes a first production device 3 and a second production device 31, the first production device 3 is used to produce a first absorbent continuum, and the second production device 31 is used to produce a second absorbent continuum 14. The above-mentioned production device may include devices with functions such as unwinding, cutting, laminating, embossing and peripheral sealing, which can realize the composite molding of raw materials such as non-woven fabrics and absorbent paper to form an absorbent continuum. In this way, the stacked tearable sanitary napkin can be produced quickly after the first absorbent continuum and the second absorbent continuum 14 are formed, and the continuity and efficiency of production are improved. The size or performance of the first absorbent continuum and the second absorbent continuum 14 can be conveniently adjusted according to needs, and the product flexibility is higher.

[0073] In other embodiments, the equipment for producing a laminated tearable sanitary napkin may not include the first production device 3 and the second production device 31, and the first absorbent continuum and the second absorbent continuum 14 may adopt ready-made absorbent continua.

[0074] The slitting device 4 is arranged at the end of the first conveying device 2. The slitting device 4 is provided with a cutter for slitting. Under the conveying action of the first conveying device 2, the first absorbent continuum enters the slitting device 4. The slitting device 4 slitting along the length direction of the first absorbent continuum, and cuts the first absorbent continuum into a plurality of first absorbent bodies 1. After the slitting is completed, the first absorbent bodies 1 leave the slitting device 4 one after another.

[0075] like Figure 2 and Figure 4 As shown, the stacked tearable sanitary napkin production equipment also includes a bonding device 5, which includes a bonding mechanism 51, a first glue injection mechanism 52 and a second glue injection mechanism 53. The first glue injection mechanism 52 injects adhesive into one side of the base film 12, and then the bonding mechanism 51 bonds the base film 12 and the release paper 13 by rolling. After the base film 12 and the release paper 13 are bonded, they reach the second glue injection mechanism 53. The second glue injection mechanism 53 injects glue into the side of the base film 12 away from the release paper 13, and then the base film 12 and the second absorbent continuum 14 are bonded and bonded by traction. After the second absorbent continuum 14 and the base film 12 are bonded, they reach the bottom of the transfer device 6.

[0076] like Figure 5 and Figure 6 As shown, the transfer device 6 is disposed between the first conveying device 2 and the second conveying device 21 , and is used to transfer the first absorbent bodies 1 to the side of the second absorbent continuum 14 away from the bottom film 12 , and to leave a distance between adjacent first absorbent bodies 1 .

[0077] The transfer device 6 includes a moving mechanism and a first adsorption mechanism 61. The first adsorption mechanism 61 is used to adsorb the first absorbent body 1, so that the first absorbent body 1 is fixed to the moving mechanism and the movement of the first absorbent body 1 is synchronized with that of the moving mechanism.

[0078] In one embodiment of the present application, the motion mechanism includes a motion roller 62 and a driving assembly, the driving assembly is used to drive the motion roller 62 to rotate, the rotation axis of the motion roller 62 is horizontally arranged, so that the highest end of the cylinder of the motion roller 62 is close to the first conveying device 2, and the lowest end of the cylinder of the motion roller 62 is close to the second conveying device 21. During the rotation of the motion roller 62, the motion roller 62 drives the first absorbent body 1 to move in a direction close to the second conveying device 21.

[0079] One or more moving rollers 62 can be provided, and the number of moving rollers 62 can be adjusted according to the actual production equipment space or production needs. In the present embodiment, three moving rollers 62 are provided, and the three moving rollers 62 are distributed up and down, and the cylinders of adjacent moving rollers 62 are adjacent to each other.

[0080] like Figure 5 and Figure 7 As shown, in order to install the moving roller 62, the stacked tearable sanitary napkin production equipment can be provided with a mounting frame, on which a roller shaft 622 is fixedly installed. A base plate 621 is provided at the end of the moving roller 62 on the axis line. The base plate 621 is rotatably mounted on the roller shaft 622. The driving assembly drives the base plate 621 to rotate, thereby driving the moving roller 62 to rotate relative to the roller shaft 622.

[0081] The cylindrical surface of the moving roller 62 is provided with a plurality of adsorption holes 624. The moving roller 62 is divided into a negative pressure zone 63 and a normal pressure zone 64 on a radial plane. The first adsorption mechanism 61 generates negative pressure in the negative pressure zone 63. The first adsorption mechanism 61 is fixedly mounted on the roller shaft 622 so that the cylindrical surface of the moving roller 62 moves relative to the first adsorption mechanism 61. Specifically, when the moving roller 62 rotates, on a vertical plane, the distribution positions of the negative pressure zone 63 and the normal pressure zone 64 remain unchanged, and the cylindrical surface of the moving roller 62 rotates.

[0082] In this embodiment, the first adsorption mechanism 61 includes a negative pressure fan 611 and an exhaust pipe 612. The air inlet of the negative pressure fan 611 is connected to the exhaust pipe 612, the air outlet of the negative pressure fan 611 is connected to the outside of the moving drum 62, and the pipe mouth of the exhaust pipe 612 is connected to the negative pressure zone 63. When the negative pressure fan 611 is operating, the negative pressure zone 63 forms a negative pressure, and the adsorption holes 624 on the column surface of the moving drum 62 corresponding to the negative pressure zone 63 also generate negative pressure, thereby producing an adsorption and fixing effect on the first absorbent body 1.

[0083] In order to accurately divide the negative pressure zone 63 and the normal pressure zone 64, in addition to using the range of negative pressure generated by the first adsorption mechanism 61 as the negative pressure zone 63, a partition 623 can also be fixedly installed on the side wall of the roller shaft 622, and a gap is left between the partition 623 and the inner wall of the moving roller 62. Taking this embodiment as an example, the area separated by the partition 623 is the negative pressure zone 63 and the normal pressure zone 64, so that the flow range of the negative pressure airflow is more accurate.

[0084] The boundary between the negative pressure zone 63 and the normal pressure zone 64 is close to the adjacent moving roller 62, and the relative positions of the negative pressure zone 63 and the normal pressure zone 64 of the adjacent moving roller 62 are opposite. When the first absorbent body 1 rotates on the cylindrical surface of the moving roller 62 to the boundary between the negative pressure zone 63 and the normal pressure zone 64, the adsorption force on the first absorbent body 1 is weakened, and the first absorbent body 1 continues to rotate and will be closer to the negative pressure zone 63 of the adjacent moving roller 62. Therefore, the first absorbent body 1 is adsorbed by the adjacent roller, thereby realizing the transfer of the first absorbent body 1 between the adjacent moving rollers 62.

[0085] Through the cooperation of the three moving rollers 62, the functions of the three moving rollers 62 on the first absorbent body 1 can be divided into receiving, moving and placing, so that the transfer process of the first absorbent body 1 can be further adjusted. According to the actual situation of the production equipment, the rotation speed of one or several of the moving rollers 62 can be adjusted, so as to control the transfer speed of the first absorbent body 1, and make it possible to accurately control the combination position of the first absorbent body 1 and the second absorbent continuum 14, thereby ensuring the production speed while improving the production quality.

[0086] The driving assembly includes a motor, which can drive the bottom plate 621 to rotate through a belt transmission structure as a power output, or can drive the bottom plate 621 to rotate through a gear transmission structure as a power output, and finally realize the rotation of the moving roller 62. In addition, only one driving assembly can be provided, and the three moving rollers 62 can be synchronously rotated by providing a mutually meshing structure between the moving rollers 62. Multiple driving assemblies can also be provided, and each driving assembly independently drives the corresponding moving roller 62 to rotate. This embodiment specifically adopts a method of independently driving multiple driving assemblies, which can flexibly adjust the rotation speed of each moving roller 62, so as to better control the speed at which the first absorbent body 1 reaches the second absorbent continuum 14.

[0087] In other embodiments, the motion mechanism includes a multi-axis linear module, which can be a two-axis linear module. The output end of the multi-axis linear module moves between the first conveying device 2 and the second conveying device 21, and the output end of the multi-axis linear module can be translated in the vertical and horizontal directions. The first adsorption mechanism 61 is installed at the output end of the multi-axis linear module. The first adsorption mechanism 61 can be a vacuum suction cup, which uses the vacuum suction cup to adsorb the first absorbent body 1. In the process of transferring the first absorbent body 1, the first absorbent body 1 is received, moved and placed on the second absorbent continuum 14 by moving the output end of the multi-axis linear module. However, the use of a motion roller 62 as a motion mechanism will have higher consistency and efficiency.

[0088] like Figure 5 As shown, the second conveying device 21 is installed with a second adsorption mechanism 211, and the second adsorption mechanism 211 also includes a negative pressure fan 611 and an exhaust pipe 612. The second adsorption mechanism 211 generates negative pressure on the surface of the second absorbent continuum 14 and adsorbs the first absorbent body 1, so that after the first absorbent body 1 is transferred from the moving drum 62, the first absorbent body 1 can fit tightly to the second absorbent continuum 14, maintain the stability of the initial combination of the first absorbent body 1 and the second absorbent continuum 14, and can keep the distance between adjacent first absorbent bodies 1 unchanged, reducing the occurrence of displacement.

[0089] like Figure 8 and Fig. 9 As shown, the first absorbent body 1 and the second absorbent continuum 14 are initially combined and then enter the joining device 7 together. The joining device 7 is arranged on the second conveying device 21. In one embodiment of the present application, the joining device 7 uses a hot pressing device, which includes two hot pressing rollers 71. The surfaces of the hot pressing rollers 71 have a certain heating temperature. The two hot pressing rollers 71 heat and press the first absorbent body 1 and the second absorbent continuum 14 to achieve a fixed connection between the first absorbent body 1 and the second absorbent continuum 14. In order to improve the bonding strength between the first absorbent body 1 and the second absorbent continuum 14, convex points can be arranged on the surface of the hot pressing rollers 71. Under the pressure of the convex points, the contact area between the first absorbent body 1 and the second absorbent continuum 14 is increased to improve the connection stability.

[0090] As for the degree of heat-compression bonding, the periphery or part of the periphery of the first absorbent body 1 can be selected to be heat-compressed and bonded to the second absorbent continuum 14. Specifically, the embodiment of the present application preferably adopts a method of completely heat-compressing and bonding the periphery of the first absorbent body 1 to the second absorbent continuum 14. Because the size of the first absorbent body 1 of the present application is smaller than that of the second absorbent body 11, space has been reserved for the user to contact and tear the first absorbent body 1, so the requirement of convenient replacement of the first absorbent body 1 can be met. On this basis, combined with the method of completely heat-compressing and bonding the periphery of the first absorbent body 1, the first absorbent body 1 is not easy to form warping edges, thereby reducing irritation and foreign body sensation to the skin, thereby better improving the user experience of the stacked and tearable sanitary napkin.

[0091] In other embodiments, the joining device 7 may also be an ultrasonic welding device, which utilizes high-frequency vibration waves to fuse the surfaces of the first absorbent body 1 and the second absorbent continuum 14, thereby achieving a joining and fixed connection between the first absorbent body 1 and the second absorbent continuum 14. Similarly, convex points may be provided in the mold of the ultrasonic welding device to increase the contact area between the first absorbent body 1 and the second absorbent continuum 14.

[0092] After the joining and fixing is completed, the first absorbent body 1 and the second absorbent continuum 14 enter the finished product cutting device 8 together. The finished product cutting device 8 is arranged on the second conveying device 21 and is located after the joining device 7. The finished product cutting device 8 is provided with a cutter for cutting. The finished product cutting device 8 simultaneously cuts the second absorbent continuum 14, the bottom film 12 and the release paper 13, so that the second absorbent continuum 14 is cut into the second absorbent body 11 after passing through the finished product cutting device 8. Because a preset spacing has been reserved between adjacent first absorbent bodies 1 under the action of the transfer device 6, it is only necessary to set the cutting position of the finished product cutting device 8 to the middle section of the spacing between adjacent first absorbent bodies 1, and a stacked tearable sanitary napkin comprising the first absorbent body 1, the second absorbent body 11, the bottom film 12 and the release paper 13 is obtained, and the size of the first absorbent body 1 is smaller than that of the second absorbent body 11, which meets the subsequent use requirements of conveniently separating the first absorbent body 1.

[0093] The present application carries out compounding of the stacked tearable sanitary napkin during the absorbent body forming process, which is faster and more convenient than the method of first producing the first absorbent body 1 and the second absorbent body 11 separately and then joining and fixing them, and reduces the difficulty of aligning the first absorbent body 1 and the second absorbent body 11; it is easier to operate than the method of first joining and fixing the first absorbent continuum and the second absorbent continuum 14 and then cutting them, so as to meet the requirement that the size of the first absorbent body 1 is smaller than the size of the second absorbent body 11.

[0094] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A production equipment for stacked tearable sanitary napkins, characterized in that: The stacked tearable sanitary napkin comprises a first absorbent body (1) and a second absorbent body (11) which are fitted and fixedly connected, and a bottom film (12) and a release paper (13) are sequentially arranged on the side of the second absorbent body (11) facing away from the first absorbent body (1); The size of the first absorbent body (1) is smaller than the size of the second absorbent body (11), and a distance of 8 to 20 mm is left between the long side ends of the first absorbent body (1) and the long side ends of the second absorbent body (11); The production equipment comprises: A first conveying device (2) for conveying a first absorbent continuum; A slitting device (4) arranged on the first conveying device (2), the slitting device (4) being used to slit the first absorbent continuum into a plurality of first absorbent bodies (1); A second conveying device (21) for conveying a second absorbent continuum (14); A bonding device (5) for bonding the base film (12) and the release paper (13) to the second absorbent continuum (14); A transfer device (6) is arranged between the first conveying device (2) and the second conveying device (21), and the transfer device (6) is used to transfer the first absorbent body (1) to one side of the second absorbent continuous body (14), and to leave a distance between adjacent first absorbent bodies (1); A joining device (7) is arranged on the second conveying device (21), and the joining device (7) is used to join and fix the first absorbent body (1) and the second absorbent continuous body (14); A finished product cutting device (8), arranged on the second conveying device (21) and located after the joining device (7), the finished product cutting device (8) being used for cutting the second absorbent continuum (14), the base film (12) and the release paper (13); The transfer device (6) comprises a moving mechanism and a first adsorption mechanism (61), wherein the first adsorption mechanism (61) is used to adsorb and fix the first absorbent body (1) and synchronize the movement of the first absorbent body (1) with the movement of the moving mechanism, and the moving mechanism receives the first absorbent body (1) during the movement process and drives the first absorbent body (1) to move until the first absorbent body (1) reaches a predetermined position corresponding to the second absorbent continuum (14); The motion mechanism comprises a motion roller (62) and a driving assembly, wherein the driving assembly is used to drive the motion roller (62) to rotate, the first adsorption mechanism (61) is arranged inside the motion roller (62), a plurality of adsorption holes (624) are opened on the cylindrical surface of the motion roller (62), and the first adsorption mechanism (61) generates negative pressure around the adsorption holes (624); The moving roller (62) is provided with a plurality of cylindrical surfaces of adjacent moving rollers (62) and is adjacent to each other. The moving roller (62) is divided into a negative pressure zone (63) and a normal pressure zone (64) on a radial plane. The cylindrical surface of the moving roller (62) moves relative to the first adsorption mechanism (61). The first adsorption mechanism (61) causes the negative pressure zone (63) to generate negative pressure. The boundary between the negative pressure zone (63) and the normal pressure zone (64) is close to the vicinity of the adjacent moving roller (62).

2. The production equipment of the laminated tearable sanitary napkin according to claim 1, characterized in that: The second conveying device (21) is equipped with a second adsorption mechanism (211), and the second adsorption mechanism (211) is used to make the first absorbent body (1) adhere to the second absorbent continuous body (14).

3. The production equipment of the stacked tearable sanitary napkin according to claim 1, characterized in that: The joining device (7) is an ultrasonic welding device, and / or the joining device (7) is a hot pressing device.

4. A method for preparing a laminated tearable sanitary napkin, based on the production equipment according to any one of claims 1 to 3, characterized in that: The following steps are involved: Cutting the first absorbent continuum into a plurality of first absorbent bodies (1); A base film (12) and a release paper (13) are attached to one side of the second absorbent continuum; Transferring the first absorbent body (1) to the side of the second absorbent continuous body (14) away from the bottom film (12) so that a predetermined distance is left between adjacent first absorbent bodies (1); The first absorbent body (1) is joined and fixedly connected with the second absorbent continuous body (14); The second absorbent continuum (14), the base film (12) and the release paper (13) are cut to obtain a laminated tearable sanitary napkin.

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