Dry and wet mixed absorbent paper production equipment
The dry and wet mixed water-absorbing paper production equipment solves the problems of high water and energy consumption in the production of water-absorbing paper through dry molding and precise addition of polymer resin particles, combined with high-efficiency drying technology, and achieves energy-saving, environmentally friendly and efficient production.
Patent Information
- Application Number
- CN202510776808.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2025-08-22
AI Technical Summary
The existing water-absorbing paper production process consumes a large amount of water, high energy consumption, low production efficiency, and serious energy loss.
The dry and wet mixed water-absorbing paper production equipment is adopted. By introducing the wood pulp unwinding device, rolled dry wood pulp is used to replace the pulp and dissolution steps, combined with negative pressure adsorption and pre-humidification devices, dry molding and precise addition of polymer water-absorbing resin particles are achieved, moisture control is optimized, closed dry drying channels and efficient hot air circulation are adopted, and fully automatic water flow operation is supported.
Significantly reduce water resource consumption and drying energy consumption, improve production efficiency, reduce wastewater treatment pressure, improve equipment energy efficiency ratio, reduce production losses, and achieve the dual goals of energy conservation, environmental protection and high yield and high efficiency.
Smart Images
Figure CN120520105A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of absorbent paper production equipment, in particular to dry-wet mixed absorbent paper production equipment. Background Art
[0002] Absorbent paper is a special sanitary material, mainly used for water conservation, seedling cultivation and planting of sanitary napkins, diapers, fruits, vegetables and other seedlings. For example, it can be used as the inner absorbent layer of sanitary napkins and other sanitary products. At present, the absorbent layer of sanitary napkins and other sanitary products produced in China is mostly made of dust-free paper wrapped with fluff pulp and polymer absorbent resin and other materials through hot pressing or adhesive composite processing. The preparation method is: pulp mixing, pulping, decomposition, pulping, forming, extrusion dehydration, drying and then processing into a single layer of corrugated base paper, which is then rolled up for use. At the same time, another processing step is: pulp mixing, pulping, decomposition, pulping, forming, extrusion dehydration to form a semi-formed single layer of base paper, and adding polymer absorbent resin particles to the semi-formed single layer of base paper, and then unwinding the aforementioned single layer of corrugated base paper and pressing it with it, drying and corrugating it to shape it, and then cutting it into absorbent paper.
[0003] The problems with the preparation process of this type of absorbent paper are that the pulping, decomposition and pulping processes all require a large amount of water, and the semi-formed base paper in production has a high moisture content. The drying process takes a long time and consumes more energy, resulting in low production efficiency and high energy loss. Summary of the Invention
[0004] Therefore, in order to solve the above problems, the present invention provides a dry-wet mixed absorbent paper production device which is energy-saving, environmentally friendly and has high production efficiency.
[0005] To achieve the above object, the present invention adopts the following technical solutions:
[0006] A dry-wet mixed absorbent paper production device includes at least one wood pulp unwinding device, at least one wood pulp layer forming device, at least one first polymer water-absorbing resin particle unwinding device, a bottom layer material unwinding device, a top layer material unwinding device, a second polymer water-absorbing resin particle unwinding device, a negative pressure adsorption box, a pre-humidifying device, an embossing and compacting device, a drying device, an upper layer coloring / humidifying device, a lower layer coloring / humidifying device, an online slitting device, and a winding device;
[0007] The wood pulp layer forming device includes a crushing mechanism, a wood pulp unloading mechanism, a negative pressure adsorption mechanism and a mesh belt, the wood pulp unwinding mechanism is arranged at the input end of the crushing mechanism, the wood pulp unloading mechanism is arranged at the output end of the crushing mechanism, the negative pressure adsorption mechanism is arranged on the lower side of the wood pulp unloading mechanism, the mesh belt ring is arranged around the negative pressure adsorption mechanism, a conveying channel is formed between the wood pulp unloading mechanism and the mesh belt, and the first polymer water-absorbing resin particle unloading device is arranged at the input end of the conveying channel;
[0008] The bottom material unwinding device is provided at the input end of the first high molecular water absorbent resin particle unwinding device, and the unwound bottom material passes through the conveying channel, the second high molecular water absorbent resin particle unwinding device and the negative pressure adsorption box are provided at the output end of the wood pulp layer forming device, and the second high molecular water absorbent resin particle unwinding device is distributed on the upper side of the negative pressure adsorption box, the pre-humidifying device is provided at the output end of the second high molecular water absorbent resin particle unwinding device, and the embossing and compacting device is provided at the output end of the pre-humidifying device and the top material unwinding device;
[0009] The drying device is arranged at the output end of the embossing and compacting device. The drying device includes a factory drying cylinder and a conveyor mesh belt arranged on the periphery of the factory drying cylinder. A drying channel is formed between the conveyor mesh belt and the factory drying cylinder. The lower layer coloring / humidifying device and the upper layer coloring / humidifying device are respectively arranged on the periphery of the conveyor mesh belt and are distributed in sequence along the conveying direction of the conveyor mesh belt. The online slitting device is arranged at the output end of the drying device, and the winding device is arranged at the output end of the online slitting device.
[0010] Furthermore, there are two wood pulp unwinding devices, two wood pulp layer forming devices, and two first polymer water-absorbing resin particle feeding devices. The two wood pulp layer forming devices are distributed in sequence according to the assembly line. The two wood pulp unwinding devices are respectively arranged at the input ends of the crushing mechanisms of the two wood pulp layer forming devices, and the two first polymer water-absorbing resin particle feeding devices are respectively arranged at the input ends of the conveying channels of the two wood pulp layer forming devices.
[0011] Furthermore, the drying device also includes a driving roller, a tensioning roller mechanism, a plurality of guide rollers and a correction mechanism. The driving roller, the tensioning roller mechanism, the plurality of guide rollers and the correction mechanism are respectively arranged on the circumferential side of the factory drying cylinder. The conveyor mesh belt is wound around the driving roller, the tensioning roller mechanism, the guide roller and the correction mechanism, and the conveyor mesh belt is partially covered on the circumferential surface of the factory drying cylinder.
[0012] Furthermore, a first fan is provided on the peripheral side of the drying channel.
[0013] Furthermore, the upper coloring / humidifying device and the lower coloring / humidifying device are distributed at the input end of the factory drying cylinder, and the upper coloring / humidifying device is distributed on the upper side of the conveyor belt, and the lower coloring / humidifying device is distributed on the lower side of the conveyor belt.
[0014] Furthermore, the upper layer coloring / humidifying device includes an upper material storage tank, a first upper coating roller arranged on the upper material storage tank, and a second upper coating roller in contact with the first upper coating roller.
[0015] Furthermore, the lower layer coloring / humidifying device includes a lower material storage tank and a lower coating roller arranged on the lower material storage tank.
[0016] Furthermore, the upper coloring / humidifying device and the lower coloring / humidifying device are both spraying devices.
[0017] Furthermore, a secondary drying device is provided between the drying device and the online slitting device.
[0018] Furthermore, a second fan is provided on the peripheral side of the secondary drying device.
[0019] By adopting the above-mentioned technical scheme, the beneficial effects of the present invention are as follows: the dry-wet mixed absorbent paper production equipment directly uses rolled dry wood pulp to replace the pulping, decomposition and pulping steps in the traditional wet process by introducing a wood pulp unwinding device, which greatly reduces the water resource consumption in the production process, reduces the average water consumption, thereby alleviating the pressure of wastewater treatment, and conforms to the concept of energy conservation and environmental protection. Secondly, the wood pulp layer forming device adopts a crushing mechanism, a wood pulp feeding mechanism and a negative pressure adsorption mechanism to work together, and combines the conveyor mesh belt to form a dry conveying channel, so that the wood pulp layer is quickly formed in a dry state, reducing the initial moisture content of the semi-formed base paper, thereby shortening the subsequent drying time, significantly reducing the drying energy consumption, and improving the overall energy efficiency ratio of the equipment. Furthermore, the first polymer absorbent resin particle feeding device is used to directly add high-molecular water-absorbing resin particles at the input end of the conveying channel. The sub-water-absorbent resin particles and the second high-molecular water-absorbent resin particle feeding device are distributed on the upper side of the negative pressure adsorption box, which realizes the dry and precise addition of high-molecular water-absorbent resin particles, avoids the introduction of moisture in the traditional adhesive composite process, and reduces the drying burden; at the same time, the design of the pre-humidification device and the embossing compaction device ensures that the material is only locally humidified when necessary, further optimizes moisture control, and improves production efficiency. The drying cylinder of the drying device and the conveyor belt form a closed drying channel, which realizes efficient hot air circulation and reduces heat loss. The continuous layout of the online slitting device and the winding device supports fully automatic assembly line operation, reduces manual intervention and downtime, not only improves production capacity, but also reduces production losses, and overall achieves the dual goals of energy saving and environmental protection and high yield and high efficiency of the "dry cotton laying and wet forming" mode. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of the production equipment in Example 1 of the present invention;
[0021] Figure 2 1 is a schematic structural diagram of a wood pulp layer forming device in a first embodiment of the present invention;
[0022] Figure 3 1 is a schematic structural diagram of a drying device in Embodiment 1 of the present invention;
[0023] Figure 4 It is a structural diagram of the production equipment in Example 2 of the present invention. DETAILED DESCRIPTION
[0024] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.
[0025] The embodiments of the present invention are:
[0026] refer to Figure 1 、 Figure 2 and Figure 3 As shown, a dry-wet mixed absorbent paper production device includes two wood pulp unwinding devices 1, two wood pulp layer forming devices 2, two first polymer water-absorbing resin particle unwinding devices 3, a bottom material unwinding device 4, a top material unwinding device 5, a second polymer water-absorbing resin particle unwinding device 6, a negative pressure adsorption box 7, a pre-humidifying device 8, an embossing and compacting device 9, a drying device 10, an upper layer coloring / humidifying device 11, a lower layer coloring / humidifying device 12, an online slitting device 13, and a winding device 14;
[0027] The two wood pulp layer forming devices 2 are distributed in sequence along the assembly line. The wood pulp layer forming device 2 includes a crushing mechanism 21, a wood pulp unloading mechanism 22, a negative pressure adsorption mechanism 23 and a mesh belt 24. The two wood pulp unwinding mechanisms 1 are respectively arranged at the input end of the crushing mechanism 21 of the two wood pulp layer forming devices 2, the wood pulp unloading mechanism 22 is arranged at the output end of the crushing mechanism 21, the negative pressure adsorption mechanism 23 is arranged on the lower side of the wood pulp unloading mechanism 23, and the mesh belt 24 is arranged around the negative pressure adsorption mechanism 23. A conveying channel 25 is formed between the wood pulp unloading mechanism 22 and the mesh belt 24. The two first polymer water-absorbing resin particle unloading devices 3 are respectively arranged at the input end of the conveying channel 25 of the two wood pulp layer forming devices 2;
[0028] The bottom material unwinding device 4 is provided at the input end of the first high molecular water absorbent resin particle unwinding device 3, and the unwound bottom material passes through the conveying channel 25, the second high molecular water absorbent resin particle unwinding device 6 and the negative pressure adsorption box 7 are provided at the output end of the wood pulp layer forming device 2, and the second high molecular water absorbent resin particle unwinding device 6 is distributed on the upper side of the negative pressure adsorption box 7, the pre-humidifying device 8 is provided at the output end of the second high molecular water absorbent resin particle unwinding device 6, and the embossing compacting device 9 is provided at the output end of the pre-humidifying device 8 and the top material unwinding device 5;
[0029] The drying device 10 is arranged at the output end of the embossing and compacting device 9. The drying device 10 includes a factory drying cylinder 101 and a conveyor mesh belt 102 arranged on the periphery of the factory drying cylinder 101. A drying channel 103 is formed between the conveyor mesh belt 102 and the factory drying cylinder 101. The lower layer coloring / humidifying device 12 and the upper layer coloring / humidifying device 11 are respectively arranged on the periphery of the conveyor mesh belt 102 and are distributed in sequence along the conveying direction of the conveyor mesh belt 102. The online slitting device 13 is arranged at the output end of the drying device 10, and the winding device 14 is arranged at the output end of the online slitting device 13.
[0030] The dry-wet mixed absorbent paper production equipment directly uses rolled dry wood pulp to replace the pulping, decomposition and pulping steps in the traditional wet process by introducing a wood pulp unwinding device 2, which greatly reduces the water resource consumption in the production process, reduces the average water consumption, and thus alleviates the pressure of wastewater treatment, which is in line with the concept of energy conservation and environmental protection. Secondly, the wood pulp layer forming device 2 adopts a crushing mechanism 21, a wood pulp feeding mechanism 22 and a negative pressure adsorption mechanism 23 to work together, and combines with the mesh belt 24 to form a dry conveying channel 25, so that the wood pulp layer can be quickly formed in a dry state, reducing the initial moisture content of the semi-formed base paper, thereby shortening the subsequent drying time, significantly reducing the drying energy consumption, and improving the overall energy efficiency ratio of the equipment. Moreover, the first polymer absorbent resin particle feeding device 3 is used to directly add polymer absorbent resin particles at the input end of the conveying channel 25, and the second polymer absorbent resin particle feeding device 3 is used to directly add polymer absorbent resin particles at the input end of the conveying channel 25. The molecular water-absorbing resin particle unloading device 6 is distributed on the upper side of the negative pressure adsorption box 7, which realizes the dry and precise addition of the polymer water-absorbing resin particles, avoids the introduction of moisture in the traditional adhesive composite process, and reduces the drying burden; at the same time, the design of the pre-humidification device 8 and the embossing and compacting device 9 ensures that the material is only locally humidified when necessary, further optimizes moisture control, and improves production efficiency. The factory drying cylinder 101 of the drying device 10 and the conveyor belt 102 form a closed drying channel 103, which realizes efficient hot air circulation and reduces heat loss. The continuous layout of the online slitting device 13 and the winding device 14 supports fully automatic assembly line operations, reduces manual intervention and downtime, not only improves production capacity, but also reduces production losses, and overall achieves the dual goals of energy saving and environmental protection and high yield and high efficiency of the "dry cotton laying and wet forming" mode.
[0031] There are two wood pulp unwinding devices 1, two wood pulp layer forming devices 2, and two first high-molecular water-absorbing resin particle feeding devices 3. Through the parallel design of the two sets of devices, the production of multi-layer absorbent paper is realized, which not only reduces the energy consumption per unit product, but also avoids the risk of production stoppage due to failure of the traditional single assembly line, improves the reliability and utilization of the equipment, and the double distribution of the wood pulp layer forming device 2 allows the wood pulp layers to be independently formed and stacked in a dry state without the need for an additional wet composite process, thereby further reducing water consumption and the amount of chemical additives used, saving raw material costs, and reducing wastewater discharge, enhancing environmental protection. The setting of the double first high-molecular water-absorbing resin particle feeding device ensures that the resin particles The particles are evenly distributed in the multi-layer material, which avoids particle agglomeration or segregation, and improves the liquid absorption performance and structural uniformity of the absorbent paper. At the same time, due to the dry addition process, the resin particles are adsorbed and fixed at the input end of the conveying channel 25, which reduces the resin migration loss during the drying process and reduces the defective rate. The assembly line distribution optimizes the equipment layout, reduces the floor space, facilitates maintenance and operation, supports large-scale continuous production, improves the overall production efficiency, and indirectly reduces the energy loss per unit product. Of course, it can also be a wood pulp unwinding device 1, a wood pulp layer forming device 2, and a first polymer absorbent resin particle unloading device 3, which can also solve the technical problem, but the water absorption capacity of the produced absorbent paper is relatively reduced.
[0032] In addition, the drying device 10 further includes a driving roller 104, a tensioning roller mechanism 105, a plurality of guide rollers 106, a correction mechanism 107 and a wrinkling scraper 108. The driving roller 104, the tensioning roller mechanism 105, the plurality of guide rollers 106 and the correction mechanism 107 are respectively arranged on the circumferential side of the factory drying cylinder 101, and the conveyor mesh belt 102 is wound around the driving roller 104, the tensioning roller mechanism 105, the guide roller 106 and the correction mechanism 107. The conveyor mesh belt 102 is partially covered on the circumferential surface of the factory drying cylinder 101. The driving roller 104 and the tensioning roller mechanism 105 ensure the stable operation of the conveyor mesh belt 102 in the drying channel 103, avoid the conveyor mesh belt 102 from loosening or slipping, thereby reducing the risk of material jamming or breakage, making the drying process continuous and smooth, and improving production efficiency. At the same time, the tensioning roller mechanism 105 automatically adjusts the conveyor mesh belt 10 2 tension, adapting to materials with different moisture contents, preventing material deformation or uneven thickness caused by uneven tension, and improving product consistency. The correction mechanism 107 monitors and corrects the offset of the conveyor belt 102 in real time to ensure that the absorbent paper layer is aligned in the drying channel, reducing edge waste or slitting loss, which not only saves raw materials, but also reduces the burden on the subsequent slitting device 13, indirectly shortening the production cycle, and the optimized arrangement of multiple guide rollers 106 enhances the wrapping of the conveyor belt 102 on the side of the factory drying cylinder 101, thereby improving the heat conduction efficiency. At the same time, by evenly distributing heat, it avoids local overheating or insufficient drying, shortens the drying time, and significantly reduces energy consumption. The overall structure enhances the durability and adaptability of the drying device 10, reduces maintenance frequency, supports the rapid processing of high-humidity materials, solves the problem of "large energy loss" in the background technology, and improves the overall energy efficiency of the equipment.
[0033] Furthermore, a first fan 15 is provided on the periphery of the drying channel 103. The first fan 15 provides forced convection hot air to accelerate the air circulation in the drying channel 103, thereby greatly improving the water evaporation efficiency. The negative pressure or positive pressure airflow generated by the first fan 15 can penetrate the pores of the material and evenly remove deep moisture, thereby shortening the drying cycle and reducing the energy consumption cost per unit product. Secondly, the directional air supply of the first fan 15 can be combined with the heat source of the factory drying cylinder 101 to realize the recycling of hot air, further improve the thermal energy utilization rate, reduce external energy input, and meet the energy conservation and environmental protection goals; at the same time, the first fan 15 can adjust the wind speed and temperature to adapt to different material thicknesses and humidity, enhance the flexibility of the equipment, and reduce the defective rate. By optimizing the airflow distribution, the first fan 15 helps to remove moisture and water vapor generated during the drying process, prevent the accumulation of condensed water from causing equipment corrosion or material adhesion, extend the life of the equipment, and maintain a stable production environment, indirectly improving production efficiency. This feature achieves high return benefits with low additional energy consumption, making the drying process more efficient and controllable.
[0034] In this embodiment, the upper coloring / humidifying device 11 and the lower coloring / humidifying device 12 are distributed at the input end of the factory drying cylinder 101, and the upper coloring / humidifying device 11 is distributed on the upper side of the conveyor mesh belt 102, and the lower coloring / humidifying device 12 is distributed on the lower side of the conveyor mesh belt 102. The coloring / humidifying device 11 is placed in front of the drying entrance, allowing the material to be accurately humidified or colored locally before drying, greatly reducing the water consumption for humidification. At the same time, humidification is only applied to the surface when necessary. Water, to avoid excessive moisture inside the semi-formed base paper, so as to reduce the burden of subsequent drying, shorten the drying time, and reduce energy consumption. The distribution design of the upper coloring / humidifying device 11 on the upper side and the lower coloring / humidifying device 12 on the lower side supports double-sided synchronous processing, improves the operating efficiency, ensures that the water absorption performance or appearance of the upper and lower layers of the absorbent paper is uniform, and improves the product quality; especially in the application of the polymer resin layer, the pre-humidification can activate the resin particles, enhance its bonding with the wood pulp layer, and reduce the risk of delamination after drying. The process flow is optimized to achieve seamless connection between humidification / coloring and drying, reduce production interruptions and increase line speed; this feature achieves water saving, energy saving and efficient production through "dry and wet zoning" control; the upper coloring / humidifying device 11 includes an upper material storage tank 111, a first upper coating roller 112 provided on the upper material storage tank 111 and a second upper coating roller 113 in contact with the first upper coating roller 112. The combination of the upper material storage tank 111 and the double coating rollers realizes precise metering and transfer of pigments or humidifiers, ensures coating uniformity, and improves the appearance quality and functional consistency of absorbent paper; the lower coloring / humidifying device 12 includes a lower material storage tank 121 and a lower coating roller 122 provided on the lower material storage tank 121. The simple design of the lower material storage tank 121 and the lower coating roller 122 accurately processes the material on the lower side of the conveyor belt, avoids complex mechanisms, reduces equipment costs and maintenance requirements, and the lower coating roller 122 has a compact structure and is integrated with the input end of the drying device 10, shortens the process path, and reduces production delays.
[0035] Furthermore, a secondary drying device 16 is provided between the drying device 10 and the online slitting device 13. A second fan 17 is provided on the peripheral side of the secondary drying device 16. The secondary drying device 16 provides a supplementary drying stage to ensure that the material reaches the optimal moisture content before slitting, thereby improving product stability. At the same time, the main drying device can focus on preliminary dehydration, and the secondary drying targets residual humidity, shortening the main drying time and reducing its energy consumption load. This design allows for staged temperature control to prevent overheating from damaging the polymer material and ensure water absorption performance. At the same time, the secondary drying serves as a buffer link to reduce the impact of production line fluctuations and support continuous high-speed production.
[0036] A method for producing dry-wet mixed absorbent paper, characterized in that it comprises the following steps:
[0037] 1) The bottom material is unrolled and conveyed, and high molecular water-absorbing resin particles are applied to the upper surface of the bottom material;
[0038] 2) unwinding and conveying the wood pulp, crushing the wood pulp, and then applying the crushed wood pulp to the upper surface of the product in step 1;
[0039] 3) applying polymer water-absorbing resin particles to the upper surface of the product of step 2;
[0040] 4) unwinding and conveying the wood pulp, crushing the wood pulp, and then applying the crushed wood pulp to the upper surface of the product in step 3;
[0041] 5) applying negative pressure to the product of step 4 through a negative pressure adsorption box 7, and applying polymer water-absorbing resin particles to the product of step 4;
[0042] 6) Pre-humidifying the product of step 5 by a pre-humidifying device 8;
[0043] 7) The top layer material is unrolled and conveyed, and is laminated onto the upper surface of the product in step 6 through an embossing and compacting device 9;
[0044] 8) The product from step 7 is conveyed to a drying device 10. The drying device 10 includes a drying cylinder 101 and a conveyor mesh belt 102 disposed around the drying cylinder 101. A drying channel 103 is formed between the conveyor mesh belt 102 and the drying cylinder 101. The surface of the conveyor mesh belt 102 is humidified by a lower coloring / humidifying device 12. The product from step 7 is then attached to the conveyor mesh belt 102 and conveyed by the conveyor mesh belt 102.
[0045] 9) The product attached to the conveyor belt 102 is humidified again by the upper coloring / humidifying device 11;
[0046] 10) The product from step 7 is conveyed into a drying channel 103 via a conveyor belt 102 for drying;
[0047] 11) performing a secondary drying process on the product of step 10 by a secondary drying device 16;
[0048] 12) Cut the dried products into pieces and then rewind them.
[0049] Of course, the polymer water-absorbing resin particles and wood pulp applied in the above steps 1 and 2 are applied to the base material in sequence, or can be mixed and then applied to the base material simultaneously.
[0050] This production method uses an innovative dry-wet mixed process design to simultaneously save water resources and reduce energy consumption: the dry wood pulp is directly unrolled and transported to avoid the water-consuming steps of pulping and decomposition in the traditional wet process, and the precise local humidification control of the negative pressure adsorption box and the pre-humidification device is used to reduce the overall process water consumption; at the same time, since the initial moisture content of the semi-finished product is reduced to, the heat energy consumption of the drying device is lower than that of the traditional process. This "dry-based treatment as the main and wet-based adjustment as the auxiliary" production model achieves a dual improvement in environmental and economic benefits while ensuring the product's water absorption rate and tensile strength.
[0051] In this embodiment, the bottom layer material and the top layer material are toilet paper, and of course they can also be non-woven fabrics.
[0052] In this embodiment, the upper coloring / humidifying device 11 and the lower coloring / humidifying device 12 are used to humidify the material. Of course, they can also be used to color the material to achieve dyeing of the material and improve the aesthetics.
[0053] Example 2:
[0054] refer to Figure 4 As shown, this embodiment 2 provides another implementation method, in which the upper coloring / humidifying device 11 and the lower coloring / humidifying device 12 are both spraying devices. The spraying device replaces roller coating and provides a non-contact processing method to avoid physical damage to the material surface by the coating roller, ensure the structural integrity of the absorbent paper, and improve the functionality of the product. In addition, the spraying system can achieve more precise atomization control, accurately cover local areas of the material, greatly reduce liquid usage, and allow the use of low-viscosity additives, thereby enhancing process flexibility.
[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.
[0056] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0057] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0058] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.
Claims
1. A dry-wet mixed absorbent paper production equipment, characterized by: It includes at least one wood pulp unwinding device, at least one wood pulp layer forming device, at least one first polymer water-absorbing resin particle unwinding device, a bottom material unwinding device, a top material unwinding device, a second polymer water-absorbing resin particle unwinding device, a negative pressure adsorption box, a pre-humidifying device, an embossing and compacting device, a drying device, an upper layer coloring / humidifying device, a lower layer coloring / humidifying device, an online slitting device, and a winding device; The wood pulp layer forming device includes a crushing mechanism, a wood pulp unloading mechanism, a negative pressure adsorption mechanism and a mesh belt, the wood pulp unwinding mechanism is arranged at the input end of the crushing mechanism, the wood pulp unloading mechanism is arranged at the output end of the crushing mechanism, the negative pressure adsorption mechanism is arranged on the lower side of the wood pulp unloading mechanism, the mesh belt ring is arranged around the negative pressure adsorption mechanism, a conveying channel is formed between the wood pulp unloading mechanism and the mesh belt, and the first polymer water-absorbing resin particle unloading device is arranged at the input end of the conveying channel; The bottom material unwinding device is provided at the input end of the first high molecular water absorbent resin particle unwinding device, and the unwound bottom material passes through the conveying channel, the second high molecular water absorbent resin particle unwinding device and the negative pressure adsorption box are provided at the output end of the wood pulp layer forming device, and the second high molecular water absorbent resin particle unwinding device is distributed on the upper side of the negative pressure adsorption box, the pre-humidifying device is provided at the output end of the second high molecular water absorbent resin particle unwinding device, and the embossing and compacting device is provided at the output end of the pre-humidifying device and the top material unwinding device; The drying device is arranged at the output end of the embossing and compacting device. The drying device includes a factory drying cylinder and a conveyor mesh belt arranged on the periphery of the factory drying cylinder. A drying channel is formed between the conveyor mesh belt and the factory drying cylinder. The lower layer coloring / humidifying device and the upper layer coloring / humidifying device are respectively arranged on the periphery of the conveyor mesh belt and are distributed in sequence along the conveying direction of the conveyor mesh belt. The online slitting device is arranged at the output end of the drying device, and the winding device is arranged at the output end of the online slitting device.
2. The dry-wet mixed absorbent paper production equipment according to claim 1, characterized in that: There are two wood pulp unwinding devices, two wood pulp layer forming devices, and two first polymer water-absorbing resin particle feeding devices. The two wood pulp layer forming devices are distributed in sequence according to the assembly line. The two wood pulp unwinding devices are respectively arranged at the input ends of the crushing mechanisms of the two wood pulp layer forming devices, and the two first polymer water-absorbing resin particle feeding devices are respectively arranged at the input ends of the conveying channels of the two wood pulp layer forming devices.
3. The dry-wet mixed absorbent paper production equipment according to claim 1 or 2, characterized in that: The drying device also includes a driving roller, a tensioning roller mechanism, a plurality of guide rollers and a correction mechanism. The driving roller, the tensioning roller mechanism, the plurality of guide rollers and the correction mechanism are respectively arranged on the circumferential side of the factory drying cylinder. The conveyor mesh belt is wound around the driving roller, the tensioning roller mechanism, the guide roller and the correction mechanism, and the conveyor mesh belt is partially covered on the circumferential surface of the factory drying cylinder.
4. The dry-wet mixed absorbent paper production equipment according to claim 3, characterized in that: A first fan is provided on the peripheral side of the drying channel.
5. The dry-wet mixed absorbent paper production equipment according to claim 4, characterized in that: The upper coloring / humidifying device and the lower coloring / humidifying device are distributed at the input end of the factory drying cylinder, and the upper coloring / humidifying device is distributed on the upper side of the conveyor belt, and the lower coloring / humidifying device is distributed on the lower side of the conveyor belt.
6. The dry-wet mixed absorbent paper production equipment according to claim 5, characterized in that: The upper layer coloring / humidifying device comprises an upper material storage tank, a first upper coating roller arranged on the upper material storage tank, and a second upper coating roller in contact with the first upper coating roller.
7. The dry-wet mixed absorbent paper production equipment according to claim 6, characterized in that: The lower layer coloring / humidifying device includes a lower material storage tank and a lower coating roller arranged on the lower material storage tank.
8. The dry-wet mixed absorbent paper production equipment according to claim 5, characterized in that: The upper layer coloring / humidifying device and the lower layer coloring / humidifying device are both spraying devices.
9. The dry-wet mixed absorbent paper production equipment according to claim 1 or 2, characterized in that: A secondary drying device is provided between the drying device and the online slitting device.
10. The dry-wet mixed absorbent paper production equipment according to claim 9, characterized in that: A second fan is provided on the peripheral side of the secondary drying device.