An absorbent article, a forming process and a production line

Abstract

The application discloses an absorbent article, a forming process and a production line. The forming process comprises the following steps: center slitting a continuously conveyed barrier wall material along its running direction, and reversely folding two side edge materials respectively; pressing and connecting the folded barrier wall material and a continuously conveyed surface layer material to form a three-piece composite belt body with a central absorption area; combining a continuously conveyed absorption body with the central absorption area of the three-piece composite belt body, and wrapping and folding the two side edges of the three-piece composite belt body to the absorption body to form a product main body; and combining the product main body with a continuously conveyed bottom film material to wrap the absorption body with the barrier wall material, the surface layer material and the bottom film material. After peripheral edge sealing and pressing and cutting, an independent absorbent article is obtained. The full-automatic, continuous and stable production from raw materials to finished products is realized, and the production efficiency is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of women's product manufacturing technology, specifically to an absorbent article, molding process, and production line. Background Technology

[0002] The existing production process of absorbent items (such as sanitary napkins) usually involves multiple processes such as compounding, folding, wrapping, pressing and cutting of various materials.

[0003] In traditional production methods, these processes often rely on multiple independent machines or a large number of manual laborers, resulting in problems such as low automation, poor process continuity, low production efficiency, difficulty in ensuring product consistency, and high labor costs. In particular, it is difficult to achieve stable and high-speed automated production in complex processes such as the forming of three-dimensional retaining walls and the three-dimensional wrapping and folding of absorbent materials.

[0004] An automated molding method and equipment that integrates multi-material composite, three-dimensional molding, precise wrapping, pressing and cutting processes into a continuous production line to achieve efficient, stable and low-cost mass production. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides an absorbent article, a molding process, and a production line to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A process for molding absorbent articles, comprising: The continuously conveyed retaining wall material is cut in the center along its direction of travel, and the material on both sides after cutting is folded in the opposite direction multiple times. The folded retaining wall material is pressed together with the continuously conveyed surface material to form a three-piece composite belt with a central absorption area. The continuously conveyed absorbent is combined with the central absorption area of ​​the three-piece composite belt, and the two sides of the three-piece composite belt are wrapped and folded towards the absorbent to form the main body of the product. The product body is combined with a continuously conveyed bottom membrane material so that the retaining wall material, the surface material, and the bottom membrane material together cover the absorbent. After peripheral sealing and cutting, an independent absorbent article is obtained.

[0007] In one embodiment, the two side materials after slicing are subjected to multiple reverse folding processes, including: Based on the first surface of the two side materials, the opposite sides of the two side materials are folded in reverse for the first time. Based on the second surface of the two side materials, a second reverse fold is performed on the opposite sides of the two side materials; wherein, the first surface and the second surface are the two opposite surfaces of the side material or the retaining wall material, respectively; The two folded side materials are separated by a predetermined distance along opposite directions so that after the two side materials are pressed together with the surface material, one side of the surface material forms a central absorption area and the other side forms a skin-friendly absorption area; wherein, the predetermined distance is less than the width of the surface material.

[0008] In one embodiment, during the first reverse fold, the opposite sides of the two side materials are simultaneously folded towards one of the first or second surfaces. During the second reverse fold, the opposite sides of the material on both sides are simultaneously folded towards the other side of the first or second surface; wherein, the folding includes: Fold one of the side materials in the first direction; Fold the other side material in a second direction opposite to the first direction.

[0009] In one embodiment, the absorber is incorporated into the central absorption region of the three-piece composite strip, including: While the absorber is heated and pressed into the central absorption area of ​​the surface material, a guide portion is formed on the skin-friendly absorption area of ​​the surface material.

[0010] An absorbent article production line for implementing an absorbent article molding process as described in any one of the above claims, comprising: A retaining wall material production line is used to continuously convey retaining wall material, and to perform center cutting of the retaining wall material along its direction of travel, and to perform multiple reverse folding processes on the two side materials after cutting. A surface material production line is used to continuously convey surface material and receive folded retaining wall material conveyed by the retaining wall material production line, and to press and connect the retaining wall material and the surface material to form a three-piece composite belt with a central absorption area; wherein the output end of the retaining wall material production line converges with the surface material production line. A composite molding production line is used to composite a continuously conveyed absorbent onto the central absorption area of ​​a three-piece composite belt conveyed by the surface material production line. After the absorbent is wrapped and folded on both sides of the three-piece composite belt to form a product body, the product body is composited with a continuously conveyed bottom film material so that the retaining wall material, the surface material, and the bottom film material together cover the absorbent. After peripheral sealing and cutting, an independent absorbent item is obtained.

[0011] In one embodiment, the retaining wall material production line includes a slitting and folding section, the slitting and folding section comprising: A central cutting device is used to cut the center of the retaining wall material to form two side materials that are phase-separated; The first folding assembly is disposed after the process of the central cutting device along the traveling direction of the retaining wall material. The first folding assembly is used to perform a first reverse fold on the opposite side of the two side materials based on the first surface of the retaining wall material. The second folding assembly is disposed after the first folding assembly along the traveling direction of the retaining wall material. The second folding assembly is used to perform a second reverse fold on the opposite side of the two side materials based on the second surface of the retaining wall material. A separating component is used to separate the two side materials at a preset distance so that after the two side materials are pressed together with the surface material, one side of the surface material has a central absorption area and the other side has a skin-friendly absorption area; wherein, the preset distance is less than the width of the surface material.

[0012] In one embodiment, the first folding assembly includes a first glue gun device and a first folding device arranged sequentially; The second folding assembly includes a second glue gun device and a second folding device arranged in sequence; The first glue gun device and the second glue gun device are respectively located on the front and back sides of the side material, and the first glue gun device and the second glue gun device are respectively used to spray hot melt glue on the front and back sides of the side material; The first folding device and the second folding device are located on the front and back sides of the side material, respectively, and the first folding device and the second folding device are used to fold the front and back sides of the side material in reverse.

[0013] In one embodiment, a base film material production line for continuously conveying base film material is also included. The retaining wall material production line includes a first pre-treatment section, and the first pre-treatment section and the cutting and folding section are arranged sequentially along the processing direction. The cutting and folding section is used to perform center cutting and reverse folding processing on the retaining wall material. The surface material production line includes a second pretreatment section and a receiving and pressing section arranged sequentially along the processing direction. The input end of the receiving and pressing section is connected to the output ends of the second pretreatment section and the slitting and folding section, respectively, for receiving and pressing the surface material and the folded surface material to form a three-piece composite belt with a central absorption area. The base film material production line includes a third pretreatment section and an adhesive coating section arranged sequentially along the processing direction. The adhesive coating section is used to apply adhesive to the conveyed base film material. The first pretreatment section, the second pretreatment section, and the third pretreatment section are respectively used to continuously convey the retaining wall material, the surface layer material, and the base film material to the subsequent processes. The composite molding production line includes a first composite section, a second composite section, and a sealing and cutting section arranged in sequence. The first composite section is used to transport the absorbent and receive the three-piece composite belt transported by the surface material production line, and to fold and cover the absorbent with the three-piece composite belt; wherein, the output end of the receiving and pressing section is connected to the first composite section. The input end of the second composite section is connected to the output ends of the first composite section and the coating section, respectively. The second composite section is used to receive the three-piece composite belt conveyed by the first composite section and the base film material conveyed by the base film material production line, and to composite the three-piece composite belt with the base film material. The input end of the sealing and cutting section is connected to the output end of the second composite section. The sealing and cutting section is used to seal and cut the periphery of the composite product to obtain an independent absorbent item.

[0014] In one embodiment, the first preprocessing section includes components sequentially arranged along the processing direction: Two first air-expansion shaft unwinding devices are used to unwind the material; The first material receiving and cutting device is used to cut off the end of the material unwound by one of the first air shaft unwinding devices and press and splice it with the starting end of the material unwound by the other first air shaft unwinding device when the material unwound by one of the first air shaft unwinding devices is used up. A first material storage device is used to store a portion of the material length so that when the first material receiving and cutting device is working, the stored portion of the material length is continuously fed to subsequent processing steps.

[0015] An absorbent article, manufactured using an absorbent article molding process as described in any one of the above claims, and / or manufactured using an absorbent article production line as described in any one of the above claims, comprising: An absorbent body includes a lower layer of toilet paper, an absorbent core, and an upper layer of toilet paper. The absorbent core is disposed between the lower layer of toilet paper and the upper layer of toilet paper, and the absorbent core is bonded to both the lower layer of toilet paper and the upper layer of toilet paper. The retaining wall material includes two side materials formed by central cutting and multiple reverse folding, with the two side materials arranged opposite each other at a predetermined distance; wherein the folded areas of the two side materials are connected by adhesive. A top layer material is disposed between the two side materials to form a central absorbent area, and the inner surfaces of the two side materials are respectively bonded to the two outer surfaces of the top layer material. The absorbent body is disposed in the central absorbent area, and the upper and lower layers of toilet paper of the absorbent body are respectively bonded to the top layer material. The absorbent body, the barrier material, and the top layer material together form the main body of the product. The top surfaces of the two side materials are higher than the skin-friendly surface of the top layer material to form a skin-friendly absorbent area. The skin-friendly surface is the side of the top layer material located between the two side materials and facing away from the central absorbent area. A bottom film material is disposed at the bottom of the main body of the product, and the bottom film material is bonded to the retaining wall material; wherein, the absorber is covered by the retaining wall material, the surface material and the bottom film material in the central absorption area.

[0016] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention enables automatic cutting and three-dimensional folding of retaining wall materials, precise lamination of the surface layer and retaining wall, automatic three-dimensional wrapping of the absorbent, and final lamination and molding with the bottom film. The entire production process is continuous and highly automated, significantly reducing manual intervention and improving production efficiency, product consistency, and stability. It is suitable for large-scale, low-cost manufacturing of various absorbent materials. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an absorbent article production line provided in one embodiment of the present invention; Figure 2 This is a schematic diagram of the frame structure of an absorbent article production line provided in one embodiment of the present invention; Figure 3 for Figure 1 A schematic diagram of the structure of the first material receiving and cutting device provided in the document; Figure 4 for Figure 3 A cross-sectional structural schematic diagram of the first material receiving and cutting device provided in the diagram; Figure 5 for Figure 1 A schematic diagram of the structure of the first material storage device provided in the diagram; Figure 6 for Figure 1 A schematic diagram of the first tension control device provided in the diagram; Figure 7 for Figure 6Another perspective structural schematic diagram of the first tension control device provided in the diagram; Figure 8 for Figure 1 The schematic diagram of the first correction device mechanism provided in the document; Figure 9 for Figure 8 A front view structural schematic diagram of the first correction device mechanism provided in the document; Figure 10 for Figure 1 A schematic diagram of the central cutting device provided in the document; Figure 11 for Figure 10 A partial cross-sectional view of the central cutting device provided in the diagram; Figure 12 for Figure 1 A schematic diagram of the first folding device provided in the diagram; Figure 13 for Figure 1 The structural diagram of the slitting and separating mechanism provided in the diagram; Figure 14 for Figure 1 A schematic diagram of the adhesive scraping and pushing device provided in the document; Figure 15 for Figure 1 A schematic diagram of the three-piece pressing device provided in the document; Figure 16 for Figure 15 A partial cross-sectional structural schematic diagram of the three-piece pressing device provided in the document; Figure 17 for Figure 1 A schematic diagram of the first negative pressure conveying device provided in the document; Figure 18 for Figure 17 A side view of the first negative pressure conveying device provided in the diagram; Figure 19 for Figure 1 The structural diagram of the pressing mechanism provided in the document; Figure 20 for Figure 19 A partial cross-sectional structural schematic diagram of the pressing mechanism provided in the document; Figure 21 for Figure 1 The diagram shows a side view (left) and a partial sectional view (right) of the package folding mechanism provided in the image. Figure 22 for Figure 1 The diagram provided shows the structure of the three-piece wrapping mechanism. Figure 23 for Figure 22 A side view of the three-piece wrapping mechanism provided in the diagram; Figure 24for Figure 22 The structural diagram of the folding plate provided in the document; Figure 25 for Figure 1 The structural diagram of the circumferential sealing mechanism provided in the diagram; Figure 26 for Figure 25 A side view of the circumferential sealing mechanism provided in the diagram; Figure 27 This is a schematic diagram of the product structure after being sealed by the circumferential sealing mechanism; Figure 28 for Figure 1 The structural diagram of the forming cutter mechanism provided in the diagram; Figure 29 for Figure 28 A side view of the forming cutter mechanism provided in the diagram; Figure 30 A schematic diagram of the structure of an independent absorbent article after being cut by a forming and cutting mechanism; Figure 30 A schematic diagram of the structure of an independent absorbent article after being cut by a forming and cutting mechanism; Figure 31 This is a schematic diagram of the structure of an absorbent article provided in one embodiment of the present invention; Figure 32 for Figure 31 A schematic cross-sectional view of the absorbent material along the AA direction; Figure 33 This is a cross-sectional structural diagram of the retaining wall material formed after processing by the retaining wall material production line. Figure 34 This is a schematic cross-sectional view of the retaining wall material and the surface material after being pressed together by the surface material production line. Figure 35 This is a schematic diagram showing the state of the absorber after the first composite section is combined with the three-piece composite tape. Figure 36 This is a cross-sectional structural diagram of the main body of the product after the first composite section treatment; Figure 37 for Figure 12 A perspective structural diagram of the first folding device folding the retaining wall material provided in the diagram; Figure 38 for Figure 37 The diagram shows the folded state of the retaining wall material provided in the diagram after being folded by the first folding device.

[0018] In the diagram: A01, retaining wall material production line; A011, first pretreatment section; A1, first air shaft unwinding device; A2, first material receiving and cutting device; A21, pressing cylinder; A221, left slicing cylinder; A222, right slicing cylinder; A23, clasping cylinder; A3, first material storage device; A31, first material storage rack; A32, second material storage rack; A4, first traction device; A41, first traction wheel; A42, pressure wheel; A5, first tension control device; A51, first guide roller; A52, swing arm; A53, potentiometer; A6, first correction mechanism; A61, second guide roller; A62, photoelectric sensor; A012, slitting and folding section; A7, central slitting device; A71 A72. Upper circular blade mechanism; A8. Lower traction wheel; A8. First glue gun device; A81. First mounting bracket; A82. Glue receiving box; A83. Glue gun; A9. First folding device; A91. Second mounting bracket; A92. Handwheel screw adjusting slide; A93. Folding mechanism; A931. Folding plate; A9311. Material feeding auxiliary angle; A932. Flanging part; A9321. First flanging plate; A9322. Second flanging plate; A10. First material traction wheel; A11. Second glue gun device; A12. Second folding device; A13. Second material traction wheel; A14. Slitting and separating mechanism; A141. Adjusting swing arm; A142. Third guide roller; A15. Deviation correction device; A16. Third material... Traction wheel; A17, Third glue gun device; A02, Top layer material production line; A021, Second pretreatment section; B1, Second air shaft unwinding device; B2, Second material receiving and cutting mechanism; B3, Second material storage device; B4, Second traction device; B5, Second tension control device; B6, Second deviation correction mechanism; A022, Receiving and pressing section; B7, Fourth material traction wheel; B8, Three-piece pressing device; B81, First pressure roller; B811, First pressing section; B82, First smooth roller; B83, First pressing cylinder; B9, Fourth glue gun device; B10, Fifth material traction wheel; A03, Base film material production line; A031, Third pretreatment section; C1, Third air shaft unwinding device; C2, Third material... Material receiving and cutting mechanism; C3, third material storage device; C4, third traction device; C5, third tension control device; C6, third deviation correction mechanism; A032, glue coating section; C7, glue scraping and pushing device; C71, third mounting bracket; C72, pushing cylinder; C73, anti-stick driven roller; C8, fifth glue gun device; C9, sixth material traction wheel; A04, composite molding production line; A041, first composite section; 1, first negative pressure conveying device; 1-1, trough support; 1-2, negative pressure trough; 1-3, drive wheel; 1-4, driven wheel; 1-5, negative pressure pipe; 1-6, conveyor belt; 1-61, negative pressure hole; 2, pressing mechanism; 21, guide trough pressure roller; 211, guide trough pressing section; 22, second smooth roller;23. Second pressing cylinder; 3. Sixth glue gun device; 4. Wrapping and folding mechanism; 41. Fourth mounting bracket; 42. Wrapping drive cylinder; 43. Folding guide wheel; 44. Transmission side; 5. Three-piece wrapping mechanism; 51. Mounting shaft; 52. Folding unit; 521. Adjusting block; 522. Folding plate; 6. Second negative pressure conveying device; A042. Second composite section; 7. Third negative pressure conveying device; 8. Material pressure roller; 9. Fourth negative pressure conveying device; A043. Sealing and cutting section; 10. Circumferential sealing mechanism; 110. Circumferential sealing roller; 111. Circumferential sealing part; 120. Third smooth roller; 130. Sealing cylinder; 11. Fifth negative pressure conveying device; 12. Forming cutter mechanism; 121. Forming cutter roller; 1 211. Forming cutter section; 122. Idler roller; 123. Forming cylinder; 13. Sixth negative pressure conveying device; 14. Absorbent body; 141. Lower layer toilet paper; 142. Absorbent core; 143. Upper layer toilet paper; 15. Barrier material; 16. Top layer material; 17. Bottom film material; h1. Product perimeter embossing; h2. Three-piece embossing; h3. Guide groove embossing; a. Hot melt adhesive bonding of inner fold of barrier material; b. Hot melt adhesive bonding of barrier material and top layer material; c. Hot melt adhesive bonding of top layer material and upper layer of absorbent body; d1. Hot melt adhesive bonding of absorbent core and upper layer toilet paper; d2. Hot melt adhesive bonding of lower layer toilet paper and absorbent core; e. Hot melt adhesive bonding of top layer material and lower layer of absorbent body; g. Hot melt adhesive bonding of bottom film material and barrier material. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 38 As shown, the present invention provides a molding process for absorbent articles, comprising: The continuously conveyed retaining wall material 15 is cut in the center along its direction of travel, and the cut materials on both sides are folded in the opposite direction multiple times. The folded retaining wall material 15 is pressed together with the continuously conveyed surface material 16 to form a three-piece composite belt with a central absorption area. The continuously conveyed absorber 14 is combined with the central absorption area of ​​the three-piece composite belt, and the two sides of the three-piece composite belt are wrapped and folded towards the absorber 14 to form the main body of the product. The main body of the product is combined with the continuously conveyed bottom membrane material 17 so that the barrier material 15, the surface material 16 and the bottom membrane material 17 together cover the absorbent 14, and after peripheral sealing and cutting, an independent absorbent article is obtained.

[0021] like Figure 33 , Figures 37-38 As shown, in one embodiment, the two side materials after slicing are subjected to multiple reverse folding processes, including: Based on the first surface of the two side materials, the opposite sides of the two side materials are folded in reverse for the first time. Based on the second side of the two side materials, the opposite sides of the two side materials are folded a second time in reverse; wherein the first side and the second side are the front and back sides of the side material or retaining wall material 15, respectively. The two side materials after folding are separated by a preset distance along opposite directions so that after the two side materials are pressed together with the surface material 16, a central absorption area is formed on one side of the surface material 16 and a skin-friendly absorption area is formed on the other side; wherein, the preset distance is less than the width of the surface material 16.

[0022] In this embodiment, the opposing sides of the two side materials are folded sequentially in opposite directions based on the first and second surfaces of the two side materials, thereby forming a shape as shown. Figure 33 The folding effect shown on the two side materials is that there are inward folds and reverse folds in opposite directions on both sides of the side materials, with the first and second sides being the front and back of the side materials.

[0023] like Figure 33 As shown, in one embodiment, during the first reverse fold, the opposite sides of the two side materials are simultaneously folded towards one of the first or second sides. During the second reverse fold, the opposite sides of the material on both sides are simultaneously folded towards the other side of the first or second side; wherein, the folding includes: Fold one of the side materials in the first direction; Fold the other side material in a second direction opposite to the first direction.

[0024] In this embodiment, by performing a first reverse fold and a second reverse fold on the front and back sides of the side material respectively, and by folding the opposite sides of the two side materials in opposite directions during each fold, a shape is formed as shown. Figure 33 The folding effect shown on the two sides of the material allows for subsequent wrapping and lamination of materials, achieving automated production.

[0025] like Figure 32 ,35 As shown in -36, in one embodiment, the absorber 14 is composited into the central absorption area of ​​the three-piece composite strip, including: heating and pressing the absorber 14 into the central absorption area of ​​the surface material 16 while pressing and forming a guide portion on the skin-friendly absorption area of ​​the surface material 16.

[0026] like Figures 1 to 36 As shown, the present invention provides an absorbent article production line for implementing an absorbent article molding process as described above, comprising: The retaining wall material production line A01 is used to continuously convey the retaining wall material 15, and to perform center cutting on the retaining wall material 15 along its direction of travel, and to perform reverse folding on the two sides of the cut material respectively. The surface material production line A02 is used to continuously convey the surface material 16 and receive the folded retaining wall material 15 conveyed by the retaining wall material production line A01, and to press and connect the retaining wall material 15 and the surface material 16 to form a three-piece composite belt with a central absorption area; wherein, the output end of the retaining wall material production line A01 converges to the surface material production line A02. The composite molding production line A04 is used to composite the continuously conveyed absorbent 14 with the central absorption area of ​​the three-piece composite belt conveyed by the surface material production line A02. After the absorbent 14 is wrapped and folded on both sides of the three-piece composite belt to form the main body of the product, the main body of the product is composited with the continuously conveyed bottom film material 17, so that the barrier material 15, the surface material 16 and the bottom film material 17 together cover the absorbent 14. After peripheral sealing and cutting, an independent absorbent item is obtained.

[0027] like Figure 1 , 10 12 Figures 37-38 As shown, in one embodiment, the retaining wall material production line A01 includes a slitting and folding section A012, which includes: The central cutting device A7 is used to cut the center of the retaining wall material 15 to form phase-separated side materials; The first folding assembly is set in the central cutting device A7 after the process of the retaining wall material 15 traveling in the direction of travel. The first folding assembly is used to perform the first reverse folding on the opposite side of the two side materials based on the first surface of the retaining wall material 15. The second folding assembly is disposed after the first folding assembly along the traveling direction of the retaining wall material 15. The second folding assembly is used to perform a second reverse fold on the opposite side of the two side materials based on the second surface of the retaining wall material 15. The separating component is used to separate the two side materials at a preset distance so that after the two side materials are pressed together with the surface material 16, a central absorption area is formed on one side of the surface material 16 and a skin-friendly absorption area is formed on the other side; wherein, the preset distance is less than the width of the surface material 16.

[0028] like Figure 1 , 12 , Figures 37-38 As shown, in one embodiment, the first folding assembly includes a first glue gun device A8 and a first folding device A9 arranged in sequence; the second folding assembly includes a second glue gun device A11 and a second folding device A12 arranged in sequence; wherein, the first glue gun device A8 and the second glue gun device A11 are respectively located on the front and back sides of the side material, and the first glue gun device A8 and the second glue gun device A11 are respectively used to spray hot melt adhesive on the front and back sides of the side material; the first folding device A9 and the second folding device A12 are respectively located on the front and back sides of the side material, and the first folding device A9 and the second folding device A12 are used to fold the opposite side of the side material based on the front and back sides of the side material respectively.

[0029] In other words, the glue gun device and the folding device of the same folding assembly are located on the front and back sides of the side material, respectively, so that after the glue gun device sprays glue on one side of the side material, the folding device will fold the opposite side of the two side materials towards the side after the glue gun device has sprayed glue, thus ensuring folding stability. like Figure 12 , Figures 37-38 As shown, in one embodiment, the first folding device A9 and the second folding device A12 are identically configured, each including a second mounting bracket A91, a handwheel screw adjusting slide A92, and two opposing folding mechanisms A93. The folding mechanism A93 includes a folding plate A931 and a flanging component A932. The folding plate A931 is connected to the flanging component A932, and the flanging component A932 is inclined relative to the folding plate A931. The flanging component A932 has a first flanging plate A9321 and a second flanging plate A9322. The first flanging plate A9321 and the second flanging plate A9322 are vertically arranged to form a flanging area. The folding plate A931 has a material feeding auxiliary angle A9311, which is located on one side of the first flanging plate A9321 to assist in folding the material. The handwheel screw adjusting slide A92 is used to reasonably adjust the position between the two folding mechanisms A93 according to the product position requirements. The folded edge plate A931 and the flanged part A932 are sheet metal.

[0030] In this embodiment, under the traction of the first material traction wheel A10 and the second material traction wheel A13, the side material is conveyed to the flange area of ​​the flange part A932 via the folding plate A931. Since the first flange plate A931 limits the flange of the opposite side of the side material, and the second flange plate A9322 limits and folds the opposite side of the side material to the side with the adhesive sprayed, the effect of flange folding of the retaining wall material 15 is achieved.

[0031] It should be noted that, as Figure 1 As shown, the height of the first material traction wheel A10 is lower than the height of the first folding device A9, and the height of the second material traction wheel A13 is lower than the height of the second folding device A12, in order to ensure the working stability of the flipping and folding.

[0032] like Figure 13 As shown, in one embodiment, the separate components include: The two cutting and separating mechanisms A14 are arranged opposite to each other. The cutting and separating mechanism A14 includes an adjusting swing arm A141 and a third guide roller A142. The two cutting and separating mechanisms A14 separate the inner and outer folded retaining wall material 15 at a preset distance to adjust it to an appropriate position for composite with the surface layer. The correction device A15 includes two first correction mechanism A6 or second correction mechanism B6 arranged vertically opposite each other to correct the material on both sides respectively. Third material traction wheel A16, The third glue gun device is mainly used to apply hot melt glue to the materials on both sides of the retaining wall (achieving function b).

[0033] In one embodiment, the retaining wall material production line A01 includes a first pretreatment section A011, and the first pretreatment section A011 and the slitting and folding section A012 are arranged sequentially along the processing direction. The slitting and folding section A012 is used to perform center slitting and reverse folding processing on the retaining wall material 15.

[0034] like Figure 1 , 3 As shown in Figure 5, in one embodiment, the first preprocessing segment A011 includes the following components arranged sequentially along the processing direction: The two first air expansion shaft unwinding devices A1 are used to unwind the material; The first material receiving and cutting device A2 is used to cut off the end of the material unwound by one of the first air shaft unwinding devices A1 when the material unwound by one of the first air shaft unwinding devices A1 is used up, and press and splice it with the starting end of the material unwound by the other first air shaft unwinding device A1. The first material storage device A3 is used to store a portion of the material so that when the first material receiving and cutting device A2 is working, the stored portion of the material will be continuously fed to the subsequent process.

[0035] like Figure 3-4 As shown, in one embodiment, the first material receiving and cutting device A2 includes; A clamping mechanism is used to clamp the material when it is detected that the material unwound by one of the air shaft unwinding devices has been used up; the clamping mechanism includes two symmetrically arranged clamping cylinders A21. The slicing mechanism is used to cut the material after one side has been used. The slicing mechanism includes a left slicing cylinder A221 and a right slicing cylinder A222 that are symmetrically arranged. The joining mechanism is used to join two materials together. The joining mechanism includes two symmetrically arranged joining cylinders A23, and the slicing mechanism is located between the pressing mechanism and the joining mechanism.

[0036] In this embodiment, in the initial working state, one side of the material is unwound, and the lower end of the other side of the material is attached with double-sided tape and left in standby mode. When the photoelectric sensor detects that one side of the material is almost used up, the pressing cylinder A21 is pushed out to press the upper end of the material, the lower end snapping cylinder A23 snaps the two materials together, and the slicing cylinder is pushed out to cut the material on the side that has been used up.

[0037] like Figure 5 As shown, in one embodiment, the first material storage device A3 includes a first material storage rack A31 and a second material storage rack A32 disposed opposite to each other.

[0038] When the first material receiving and cutting device A2 is working, the first material storage rack A31 and the second material storage rack A32 retract towards the middle to release material (e.g., Figure 5 (The dotted line section) does not affect the normal operation of the main unit, achieving material change without shutting down the machine; like Figure 6-9 As shown, in one embodiment, the first pretreatment section A011 further includes sections sequentially arranged along the material travel direction after the first material storage rack process: The first traction device A4 is used to traction the material and prevent it from deviating from its intended path. The first tension control device A5 includes two first guide rollers A51, a swing arm A52 and a potentiometer A53. When the machine is working normally, the first tension control device A5 is in a horizontal dynamic balance state. When the material causes the swing arm A52 to swing up and down, the gear of the swing arm A52 rotates, and at the same time the potentiometer A53 receives a signal and controls the unwinding speed of the motor of the first material receiving and cutting device A2 through the signal, so that the swing arm A52 returns to the dynamic balance state. The first correction mechanism includes an automatic correction device, a second guide roller A61, and a photoelectric sensor A62. The second guide roller A61 and the photoelectric sensor A62 are mounted on the automatic correction device. When the material passes through the automatic correction device (which can select the left or right direction according to the actual material feeding direction), when the photoelectric sensors A62 on both sides detect the material deviation, the controller of the automatic correction device drives the second guide roller A61 to move appropriately left or right to correct the material position and ensure the material feeds to the center position.

[0039] like Figure 1-2 As shown, in one embodiment, the surface material production line A02 includes a second pretreatment section 21 and a receiving and pressing section 22 arranged sequentially along the processing direction. The input end of the receiving and pressing section 22 is connected to the output ends of the second pretreatment section 21 and the slitting and folding section A012, respectively, for receiving and pressing the surface material 16 and the folded surface material 16 to form a three-piece composite belt with a central absorption area. like Figure 15 , 16 As shown, in one embodiment, the receiving compression section 22 includes: Fourth material: Traction wheel B7 The three-piece pressing device B8 is used to press the retaining wall material 15 and the surface material 16 together. The three-piece pressing device B8 includes a first pressure roller B81, a first pressing part B811, a first smooth roller B82 and a first pressing cylinder B83. The fourth glue gun device is mainly used to spray hot melt adhesive onto the surface layer (to achieve function C) and to combine it with absorbent 14. Fifth material: traction wheel B10.

[0040] In this embodiment, the three-piece pressing device B8 heats and presses the retaining wall and the surface layer by pressing the first pressure roller B81 and the first smooth roller B82 together (achieving function h2). The surface layer production line realizes the three-piece pressing function of the surface layer and the retaining wall material 15.

[0041] like Figure 1-2 As shown, in one embodiment, the absorbent article production line further includes a bottom film material production line A03 for continuously conveying the bottom film material 17. The bottom film material production line A03 includes a third pretreatment section 31 and an adhesive coating section 32 arranged sequentially along the processing direction. The adhesive coating section 32 is used to apply adhesive to the conveyed bottom film material 17. The first pretreatment section A011, the second pretreatment section 21, and the third pretreatment section 31 are respectively used to continuously convey the retaining wall material 15, the surface layer material 16, and the bottom film material 17 to subsequent processes. like Figure 14 As shown, in one embodiment, the adhesive application section 32 includes the following sequentially arranged components: The adhesive-pushing device C7 is used to push the base film material 17 away from the adhesive gun A83 to prevent the hot adhesive gun A83 from burning off the material. The adhesive-pushing device C7 includes a third mounting bracket C71, a pushing cylinder C72, and an anti-stick driven roller C73. The cylinder is mounted on the mounting bracket, and the anti-stick driven roller C73 is mounted on the drive end of the cylinder. When the equipment stops, the anti-stick driven roller C73 is driven by the cylinder to push the base film material 17 away from the adhesive gun A83 to prevent the hot adhesive gun A83 from burning off the material.

[0042] The fifth glue gun device is used to apply hot melt adhesive to the materials on both sides of the base film (to achieve the g function). The sixth material is the traction wheel C9.

[0043] like Figure 1-2 As shown, in one embodiment, the composite molding production line A04 includes a first composite section 41, a second composite section 42, and a sealing and cutting section 43 arranged in sequence. The first composite section 41 is used to convey the absorber 14 and receive the three-piece composite belt conveyed by the surface material production line A02, and fold and wrap the absorber 14 with the three-piece composite belt; wherein, the output end of the receiving pressing section 22 is connected to the first composite section 41. like Figure 17-24 As shown, in one embodiment, the first composite section 41 includes a first negative pressure conveying device 1, a pressing mechanism 2, a sixth glue gun device 3, a wrapping and folding mechanism 4, a three-piece wrapping mechanism 5, and a second negative pressure conveying device 6. The pressing mechanism 2 includes a guide groove pressure roller 21, a second smooth roller 22, and a second pressing cylinder 23. The guide groove pressure roller 21 and the second smooth roller 22 are arranged opposite to each other. The driving end of the second pressing cylinder 23 is connected to the second smooth roller 22 and is used to drive the second smooth roller 22 away from or against the guide groove pressure roller 21 to press the absorber 14 and the surface material 16. The pressing surface of the guide groove pressure roller 21 is provided with a guide embossed part 211 to press the surface material 16 with a guide part (e.g., Figure 14The absorber 14 and the surface material 16 are pressed together by heating with the guide groove pressure roller 21 and the second light roller 22 (achieving function h3); the sixth glue gun device 3 is set in the same way as the first glue gun device A8, the second glue gun device A11, the third glue gun device A17, the fourth glue gun device B9, and the fifth glue gun device C8. The sixth glue gun device 3 mainly sprays hot melt glue on both sides of the surface material 16 (achieving function e); the wrapping and folding mechanism 4 includes a fourth mounting bracket 41, a wrapping drive cylinder 42, a folding guide wheel 43, and a transmission side 44. The wrapping drive cylinder 42 is mounted on the fourth mounting bracket 41, the folding guide wheel 43 is connected to the transmission side 44, and the drive end of the wrapping drive cylinder 42 is connected to the folding guide wheel 43; the three-piece wrapping mechanism 5 includes a mounting shaft 51 and two oppositely arranged folding units 52. The two folding units 52 are respectively mounted on the mounting shaft 51. The folding unit 52 includes an adjusting block 521 and a folding plate 522. The folding plate 522 is connected to the mounting shaft 51 through the adjusting block 521.

[0044] Among them, such as Figure 35 As shown, the folding guide wheel 43 presses down and guides the absorbent body 14 after it has passed through the 2 / 3 wrapping folding mechanism 4, so that the absorbent body 14 forms an angle with the two sides of the three-piece material, assisting the absorbent body 14 in wrapping and folding; and the three-piece wrapping mechanism 5 wraps and folds the three-piece material; after wrapping and folding, the product state is as follows. Figure 36 As shown, it is bonded to the bottom membrane material 17 via a negative pressure conveying device; The input end of the second composite section 42 is connected to the output ends of the first composite section 41 and the adhesive coating section 32 respectively. The second composite section 42 is used to receive the three-piece composite belt conveyed by the first composite section 41 and the bottom film material 17 conveyed by the bottom film material production line A03, and to composite the three-piece composite belt with the bottom film material 17. like Figure 1-2 As shown, in one embodiment, the second composite section 42 includes a third negative pressure conveying device 7, a pre-compression mechanism, and a fourth negative pressure conveying device 9; the pre-compression mechanism includes a material pressure roller 8 for pre-compressing the product. The input end of the sealing and cutting section 43 is connected to the output end of the second composite section 42, and the sealing and cutting section 43 is used to seal and cut the periphery of the composite product to obtain an independent absorbent article.

[0045] like Figure 25-31 As shown, in one embodiment, the sealing segment 43 includes: The circumferential sealing mechanism 10 is used to heat and press the product material and the base film material 17 together; it includes a circumferential sealing roller 110, a third smooth roller, and a sealing cylinder 130. It heats and presses the product material together using a sealing roller + smooth roller method (achieving function h1); a circumferential sealing section 111 is provided on the circumferential sealing surface of the circumferential sealing roller 110. The forming cutter mechanism 12 is used for roll cutting and forming materials. It includes a forming cutter roller 121, a support roller 122, and a forming cylinder 123. A forming cutter section 1211 is provided on the circumferential cutting surface of the forming cutter roller 121. The material is rolled and formed by heating through the forming cutter roller 121 and the support roller 122.

[0046] The second preprocessing segment 21 and the third preprocessing segment 31 are configured identically to the first preprocessing segment A011; that is, as shown in the example. Figure 1-2 As shown, the second pretreatment section 21 includes two second air shaft unwinding devices B1, a second material receiving and cutting device B2, a second material storage device B3, a second traction device B4, a second tension control device B5, and a second deviation correction mechanism B6 arranged sequentially along the processing direction; the third pretreatment section 31 includes two third air shaft unwinding devices C1, a third material receiving and cutting device, a third material storage device C3, a third traction device C4, a third tension control device C5, and a third deviation correction mechanism C6 arranged sequentially along the processing direction.

[0047] In other words, the two first air shaft unwinding devices A1, the two second air shaft unwinding devices B1 and the two third air shaft unwinding devices C1 are identically configured to unwind the retaining wall material 15, the surface material 16 and the bottom film material 17 respectively. The first material receiving and cutting device A2, the second material receiving and cutting device B2, and the third material receiving and cutting device C2 are configured identically. In the initial working state, material on one side is unwound, while the lower end of material on the other side is adhered with double-sided tape and ready for operation. When the photoelectric sensor detects that one side of the material is almost used up, a pressing cylinder pushes out to press the material at the top, a lower end-pressing cylinder presses the two materials together, and a slicing cylinder pushes out to cut the material on the used side. The first material storage device A3, the second material storage device B3, and the third material storage device C3 are configured identically to store a portion of the material. When A2 / B2 / C2 are working, the first material storage device A3 / second material storage device B3 / third material storage device C3 retracts towards the center to release the material without affecting the normal operation of the main machine, achieving material change without stopping the machine. The first traction device A4, the second traction device B4, and the third traction device C4 are identical. The system is designed to traction the material and prevent it from deviating from its intended path. The first tension control device A5, the second tension control device B5, and the third tension control device C5 are identically configured. During normal machine operation, the tension control is in a horizontally relatively dynamic balance state. When the material causes the swing arm to oscillate up and down, the swing arm gear rotates, and a signal is simultaneously acquired. This signal controls the unwinding speed of motors A1 / B1 / C1, returning the swing arm to its dynamic balance state. The first correction mechanism A6, the second correction mechanism B6, and the third correction mechanism C6 are also identically configured. As the material passes through these mechanisms (which can be selected to be left or right depending on the actual material flow direction), when the photoelectric sensors on both sides detect material deviation, the controller drives the guide rollers to move appropriately left or right to correct the material's position, ensuring the material remains centered. Devices A10 / A13 / A16 / B7 / B10 / C9 are all material traction wheels that traction the material. A8 is used to spray hot melt adhesive on the materials on both sides of the retaining wall (achieving function f); A11 has the same function as A8, spraying adhesive on the reverse side of the material (achieving function a); A12 has the same structure as A9, but the installation direction is opposite, folding the material back; A14 uses guide rollers and adjusting swing arms to separate the folded retaining wall material 15 to appropriate positions for bonding with the surface material 16; A15 corrects the misalignment of the materials on both sides; A17 applies hot melt adhesive to the materials on both sides of the retaining wall (achieving function b); B8 heats and presses the retaining wall and surface layer together using pressure rollers and smooth rollers (achieving function h2). B9 sprays hot melt adhesive on the surface layer (achieving function c) for bonding with the absorber 14. C7 is used to push the bottom film material 17 away from the hot glue gun when the equipment is stopped to prevent the hot glue gun from burning the material. C8 applies hot melt adhesive to the materials on both sides of the bottom film (achieving function g); 1 / 6 / 7 / 9 / 11 / 13 The conveyor belt has appropriate small holes for adsorbing and conveying products; 2 The absorber 14 and the surface material 16 are pressed together by heating with guide roller 21 and second smooth roller 22 (achieving function h3); 3 Hot melt adhesive is sprayed on both sides of the surface material 16 (achieving function e); 4 The absorber 14 after passing through mechanism 2 / 3 is pressed down and guided so that the absorber 14 forms an angle with the two sides of the three-piece material, which helps the absorber to wrap and fold; 5 The three-piece material is wrapped and folded, as shown in diagram 35; After wrapping and folding in steps 4 / 5 / 6, the product state is as follows. Figure 36 As shown, the material is conveyed to the negative pressure groove 7 and bonded to the bottom film material 17. 8 Pre-presses the product; 10 Heats and presses the product material using the circumferential sealing roller 110 and the third light roller 120 (achieving function h1); 12 Heats and rolls the material using the forming cutter roller 121 and the support roller 122.

[0048] The process of processing retaining wall material 15: Retaining wall material 15 is installed on the first air shaft unwinding device A1. The retaining wall material 15 first passes through the first receiving and cutting mechanism. When the current roll (i.e., one of the first air shaft unwinding devices A1) is about to run out, the first receiving and cutting mechanism automatically glues the front end of the new roll to the end of the old roll and cuts off the old material, achieving material change without stopping the machine. During material change, the first material storage device A3 releases the stored material to ensure continuous operation of the entire production line. Subsequently, the retaining wall material 15 undergoes pre-processing through the first traction device A4, the first tension control device A5 (which uses a swing arm A52 and a potentiometer A53 to control the unwinding speed and maintain tension balance), and the first correction mechanism A6 (which uses a photoelectric sensor A62 to detect and drive the guide rollers for correction). The processed flat material enters the central slitting device A7, where it is cut into two strips from the center by the upper circular blade. The two cut retaining wall strips then pass through the first folding assembly and the second folding assembly respectively, thereby achieving multiple reverse folds of the two retaining wall strips to form a three-dimensional structure. The two folded retaining wall strips are spatially separated by a suitable distance using a splitting mechanism A14, and then independently corrected by a guide device A15. After correction, they are pulled by a third material traction wheel A16 to a third glue gun device A17, where hot melt adhesive is applied to the outside of the retaining wall (corresponding to the implementation of...). Figure 32 (b) Adhesive function in the middle, preparing to be composited with surface material 16.

[0049] Surface material 16 processing and composite process with retaining wall (corresponding to B1-B10 and attached diagrams): Surface material 16 undergoes pretreatment in the second pretreatment section 21 (similar to the processing flow of the first pretreatment section A011). The pretreated surface material 16 merges with the two three-dimensional retaining wall strips output from the retaining wall material production line A01 and enters the three-piece pressing device B8. Figure 15 , 16The heated pressure roller and the smooth roller are pressed together to form a stable three-piece composite structure and a three-piece embossing h2. Hot melt adhesive is then sprayed onto a designated area of ​​the surface layer using the fourth glue gun device B9 (corresponding to the implementation of...). Figure 32 The material is bonded (c) and pulled to the composite molding production line A04 by the fifth material traction wheel B10, ready to be composited with absorber 14.

[0050] Processing flow of base film material 17 (corresponding to C1-C9 and attached diagrams): Base film material 17 undergoes pretreatment in the third pretreatment section (similar to the processing flow of the first pretreatment section A011). After pretreatment, base film material 17 is coated with adhesive in the coating section 32. In the event of a potential equipment shutdown, the adhesive scraping and pushing device C7 pushes the base film material 17 away from the downstream fifth glue gun device C8 to prevent burns. Hot melt adhesive is scraped onto both sides of the base film material 17 by the fifth glue gun device C8, and it is then pulled by the sixth material traction wheel C9 to the composite molding production line A04, ready for lamination with the main product.

[0051] Composite molding production line process: After the prefabricated absorbent 14 is introduced into the composite molding production line A04, it is conveyed by the first negative pressure conveying device 1 to the three-piece composite (surface layer + retaining wall) output from the surface material production line A02 and pressed by the pressing mechanism 22 to form the guide groove embossing h3. Side adhesive (function e) is then sprayed by the sixth glue gun device 3. Subsequently, the absorbent 14 enters the wrapping and folding stage: first, the folding guide wheel 43 of the wrapping and folding mechanism 4 presses down to guide it, forming an angle on both sides of the absorbent 14; then, the three-piece wrapping plate 5 of the three-piece wrapping mechanism 5 precisely folds it, as shown in the diagram. Figure 35 As shown, three pieces of material are wrapped around the absorber 14 to form a shape as shown. Figure 36 The product body, as shown, is conveyed by the second negative pressure conveyor 6. Figure 17 , 18 The product body is stably transported on conveyor belts 1-6 via negative pressure adsorption. It is then combined and bonded with the pre-coated bottom film material 17 output from the bottom film material production line A03 at the third negative pressure conveying device 7. After pre-pressing by the material pressure roller 8, it is conveyed by the fourth negative pressure conveying device 9 to the circumferential sealing roller 110 of the circumferential sealing mechanism 10 for heating and pressing, forming a circumferential sealing embossing h1. After circumferential sealing, the sealed product is conveyed by the fifth negative pressure conveying device 11 to the forming and cutting mechanism 12, where it is rolled and shaped by the forming cutter roller 121 to obtain an independent sanitary napkin product, which is then output via the sixth negative pressure conveying device 13.

[0052] From a material processing perspective, A1-A17 (backstop material production line A01) enables the cutting and folding of backstop materials; B1-B10 (top layer material production line A02) enables the three-piece pressing of the top layer and backstop materials; C1-C9 (bottom film material production line A03) enables the feeding and gluing of the bottom film material; and 1-13 (composite molding production line A04) enables the sequential feeding and compounding of the absorbent body 14 with the various materials conveyed by the top layer material production line A02 and the bottom film material production line A03 (assisted feeding and compounding). Through the above methods and production lines, fully automated, continuous, and high-speed molding of sanitary napkins from raw materials to finished products is achieved. The collaborative operation of each functional module ensures process stability and high product quality. This invention, through its absorbent article molding process, achieves automated and stable product production, reducing labor manufacturing costs.

[0053] An absorbent article, manufactured using any of the absorbent article molding processes and / or production lines described above, includes an absorbent body 14, a retaining material 15, a surface material 16, and a bottom film material 17. The absorbent body 14 includes a lower layer of toilet paper 141, an absorbent core 142, and an upper layer of toilet paper 143. The absorbent core 142 is disposed between the lower layer of toilet paper 141 and the upper layer of toilet paper 143. The absorbent core 142 is bonded to the lower layer of toilet paper 141 with hot melt adhesive. The absorbent core 142 is bonded to the upper layer of toilet paper 143 with hot melt adhesive. The barrier material 15 includes two side materials formed by central cutting and multiple reverse folding. The two side materials are arranged opposite each other at a preset distance. The folded areas of the two side materials are bonded together by inward folding with hot melt adhesive. The surface material 16 is folded. A central absorbent area is formed between the two side materials, and the two side materials are bonded to the surface material 16 with hot melt adhesive. The absorbent body 14 is disposed in the central absorbent area. The upper toilet paper 143 and the lower toilet paper 141 of the absorbent body 14 are respectively bonded to the surface material 16 with hot melt adhesive. The absorbent body 14, the barrier material 15, and the surface material 16 together form the main body of the product. The top surface of the two side materials is higher than the skin-friendly surface of the surface material 16 to form a skin-friendly absorbent area. The skin-friendly surface is the side of the surface material 16 located between the two side materials and facing away from the central absorbent area. The bottom film material 17 is disposed at the bottom of the main body of the product and is bonded to the barrier material 15 with hot melt adhesive. The skin-friendly absorbent area and the bottom film material 17 are located at the top and bottom of the absorbent article, respectively. The absorbent body 14 is covered by the barrier material 15, the surface material 16, and the bottom film material 17 within the central absorbent area.

[0054] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the invention and are protected by patent law.

Claims

1. A molding process for absorbent articles, characterized in that, include: The continuously conveyed retaining wall material is cut in the center along its direction of travel, and the material on both sides after cutting is folded in the opposite direction multiple times. The folded retaining wall material is pressed together with the continuously conveyed surface material to form a three-piece composite belt with a central absorption area. The continuously conveyed absorbent is combined with the central absorption area of ​​the three-piece composite belt, and the two sides of the three-piece composite belt are wrapped and folded towards the absorbent to form the main body of the product. The product body is combined with a continuously conveyed bottom membrane material so that the retaining wall material, the surface material, and the bottom membrane material together cover the absorbent. After peripheral sealing and cutting, an independent absorbent article is obtained.

2. The process for molding absorbent articles according to claim 1, characterized in that, The two sides of the cut material are folded in reverse multiple times, including: Based on the first surface of the two side materials, the opposite sides of the two side materials are folded in reverse for the first time. Based on the second side of the two side materials, a second reverse fold is made on the opposite side of each of the two side materials; wherein the first side and the second side are the front and back sides of the side material or the retaining wall material, respectively. The two folded side materials are separated by a predetermined distance along opposite directions so that after the two side materials are pressed together with the surface material, one side of the surface material forms a central absorption area and the other side forms a skin-friendly absorption area; wherein, the predetermined distance is less than the width of the surface material.

3. The process for molding absorbent articles according to claim 2, characterized in that, During the first reverse fold, the opposite sides of the material on both sides are simultaneously folded towards either the first or the second side. During the second reverse fold, the opposite sides of the material on both sides are simultaneously folded towards the other side of the first or second surface; wherein, the folding includes: Fold one of the side materials in the first direction; Fold the other side material in a second direction opposite to the first direction.

4. The process for molding absorbent articles according to claim 1, characterized in that, The absorber is incorporated into the central absorption region of the three-piece composite tape, including: While the absorber is heated and pressed into the central absorption area of ​​the surface material, a guide portion is formed on the skin-friendly absorption area of ​​the surface material.

5. An absorbent article production line for implementing an absorbent article molding process as described in any one of claims 1-4, characterized in that, include: A retaining wall material production line is used to continuously convey retaining wall material, and to perform center cutting of the retaining wall material along its direction of travel, and to perform multiple reverse folding processes on the two side materials after cutting. A surface material production line is used to continuously convey surface material and receive folded retaining wall material conveyed by the retaining wall material production line, and to press and connect the retaining wall material and the surface material to form a three-piece composite belt with a central absorption area; wherein the output end of the retaining wall material production line converges with the surface material production line. A composite molding production line is used to composite a continuously conveyed absorbent onto the central absorption area of ​​a three-piece composite belt conveyed by the surface material production line. After the absorbent is wrapped and folded on both sides of the three-piece composite belt to form a product body, the product body is composited with a continuously conveyed bottom film material so that the retaining wall material, the surface material, and the bottom film material together cover the absorbent. After peripheral sealing and cutting, an independent absorbent item is obtained.

6. The absorbent article production line according to claim 5, characterized in that, The retaining wall material production line includes a slitting and folding section, which includes: A central cutting device is used to cut the center of the retaining wall material to form two side materials that are phase-separated; The first folding assembly is disposed after the process of the central cutting device along the traveling direction of the retaining wall material. The first folding assembly is used to perform a first reverse fold on the opposite side of the two side materials based on the first surface of the retaining wall material. The second folding assembly is disposed after the first folding assembly along the traveling direction of the retaining wall material. The second folding assembly is used to perform a second reverse fold on the opposite side of the two side materials based on the second surface of the retaining wall material. A separating component is used to separate the two side materials at a preset distance so that after the two side materials are pressed together with the surface material, one side of the surface material has a central absorption area and the other side has a skin-friendly absorption area; wherein, the preset distance is less than the width of the surface material.

7. The absorbent article production line according to claim 6, characterized in that, The first folding assembly includes a first glue gun device and a first folding device arranged sequentially; The second folding assembly includes a second glue gun device and a second folding device arranged in sequence; The first glue gun device and the second glue gun device are respectively located on the front and back sides of the side material, and the first glue gun device and the second glue gun device are respectively used to spray hot melt glue on the front and back sides of the side material; The first folding device and the second folding device are located on the front and back sides of the side material, respectively, and the first folding device and the second folding device are used to fold the front and back sides of the side material in reverse.

8. The absorbent article production line according to claim 5, characterized in that, It also includes a base film material production line for the continuous conveying of base film material. The retaining wall material production line includes a first pre-treatment section, and the first pre-treatment section and the cutting and folding section are arranged sequentially along the processing direction. The cutting and folding section is used to perform center cutting and reverse folding processing on the retaining wall material. The surface material production line includes a second pretreatment section and a receiving and pressing section arranged sequentially along the processing direction. The input end of the receiving and pressing section is connected to the output ends of the second pretreatment section and the slitting and folding section, respectively, for receiving and pressing the surface material and the folded surface material to form a three-piece composite belt with a central absorption area. The base film material production line includes a third pretreatment section and an adhesive coating section arranged sequentially along the processing direction. The adhesive coating section is used to apply adhesive to the conveyed base film material. The first pretreatment section, the second pretreatment section, and the third pretreatment section are respectively used to continuously convey the retaining wall material, the surface layer material, and the base film material to the subsequent processes. The composite molding production line includes a first composite section, a second composite section, and a sealing and cutting section arranged in sequence. The first composite section is used to transport the absorbent and receive the three-piece composite belt transported by the surface material production line, and to fold and cover the absorbent with the three-piece composite belt; wherein, the output end of the receiving and pressing section is connected to the first composite section. The input end of the second composite section is connected to the output ends of the first composite section and the coating section, respectively. The second composite section is used to receive the three-piece composite belt conveyed by the first composite section and the base film material conveyed by the base film material production line, and to composite the three-piece composite belt with the base film material. The input end of the sealing and cutting section is connected to the output end of the second composite section. The sealing and cutting section is used to seal and cut the periphery of the composite product to obtain an independent absorbent item.

9. The absorbent article production line according to claim 8, characterized in that, The first preprocessing section includes the following components arranged sequentially along the processing direction: Two first air-expansion shaft unwinding devices are used to unwind the material; The first material receiving and cutting device is used to cut off the end of the material unwound by one of the first air shaft unwinding devices and press and splice it with the starting end of the material unwound by the other first air shaft unwinding device when the material unwound by one of the first air shaft unwinding devices is used up. A first material storage device is used to store a portion of the material length so that when the first material receiving and cutting device is working, the stored portion of the material length is continuously fed to subsequent processing steps.

10. An absorbent article, manufactured using an absorbent article molding process as described in any one of claims 1-4, and / or manufactured using an absorbent article production line as described in any one of claims 5-9, characterized in that, include: An absorbent body includes a lower layer of toilet paper, an absorbent core, and an upper layer of toilet paper. The absorbent core is disposed between the lower layer of toilet paper and the upper layer of toilet paper, and the absorbent core is bonded to both the lower layer of toilet paper and the upper layer of toilet paper. The retaining wall material includes two side materials formed by central cutting and multiple reverse folding, with the two side materials arranged opposite each other at a predetermined distance; wherein the folded areas of the two side materials are connected by adhesive. A top layer material is disposed between the two side materials to form a central absorbent area, and the inner surfaces of the two side materials are respectively bonded to the two outer surfaces of the top layer material. The absorbent body is disposed in the central absorbent area, and the upper and lower layers of toilet paper of the absorbent body are respectively bonded to the top layer material. The absorbent body, the barrier material, and the top layer material together form the main body of the product. The top surfaces of the two side materials are higher than the skin-friendly surface of the top layer material to form a skin-friendly absorbent area. The skin-friendly surface is the side of the top layer material located between the two side materials and facing away from the central absorbent area. A bottom film material is disposed at the bottom of the main body of the product, and the bottom film material is bonded to the retaining wall material; wherein, the absorber is covered by the retaining wall material, the surface material and the bottom film material in the central absorption area.

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