A device for preparing a glass fiber raw paper sandwich slurry and a method thereof

Abstract

The application belongs to the technical field of steel paper board, and particularly relates to a preparation device and method of glass fiber raw paper sandwich pulp material, the preparation device comprises a rack, a conveying belt, a blanking pipe and a mixing pipe, the conveying belt and the blanking pipe are respectively communicated with a mixing chamber of the mixing pipe, glass fiber and cotton linter fiber are respectively dropped into the mixing chamber through the conveying belt and the blanking pipe, a spray gun and a roller are further arranged in the mixing chamber, the cotton linter fiber is mixed with the glass fiber in the mixing chamber and adhered to the surface of the glass fiber through the rotation of the roller, and a collecting groove is further fixed to the output end of the mixing pipe. The modified glass fiber is formed by adhering the glass fiber and the cotton linter fiber, the cotton linter fiber on the surface of the glass fiber holds the cotton fiber in the pulp, so that the modified glass fiber has high bonding degree with the pulp.

Description

Technical Field

[0001] This invention belongs to the field of steel paperboard technology, specifically relating to an apparatus and method for preparing glass fiber base paper sandwich pulp. Background Technology

[0002] Steel paper is a type of processed paper with high hardness. It is made from base paper. To improve the strength of the base paper, 5%-10% glass fiber is usually added to the pulp.

[0003] However, glass fibers are needle-shaped and have a smooth surface. During the papermaking process, the bonding between glass fibers and cotton fiber pulp is relatively low. Glass fibers may penetrate the surface of the pulp sheet formed during papermaking, resulting in a rough surface of the base paper. The surface of the base paper needs to be polished, which wastes a certain amount of glass fibers. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides an apparatus and method for preparing glass fiber base paper sandwich pulp. By adhering glass fibers and cotton linters to form a sandwich-shaped modified glass fiber, the cotton linters on the surface of the glass fiber hold the cotton fibers in the pulp, thereby achieving a high degree of bonding between the modified glass fiber and the pulp.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] A device for preparing glass fiber base paper sandwich pulp includes a frame and a conveyor belt, a feeding pipe, and a mixing pipe mounted on the frame. The output ends of the conveyor belt and the feeding pipe are respectively connected to the mixing chamber of the mixing pipe. Glass fiber and cotton linter fiber fall into the mixing chamber via the conveyor belt and the feeding pipe, respectively. The mixing chamber is also equipped with a spray gun and a roller. Adhesive is sprayed onto the surface of the glass fiber via the spray gun. The roller rotates via a motor fixed to the frame. The cotton linter fiber mixes with the glass fiber in the mixing chamber and adheres to the surface of the glass fiber by means of the rotation of the roller. The output end of the mixing pipe is also fixed with a collection trough.

[0007] The roller is arranged vertically, and the sidewall of the roller is provided with a stepped, multi-level annular skirt, the size of which increases from top to bottom.

[0008] The upper surface of the skirt hem is inclined upward from the inside out, and the angle between the upper surface of the skirt hem and the horizontal plane is 10-15°.

[0009] The glass fiber has a diameter of 10-15 μm, and the cotton linter fiber has a diameter of 3-5 μm.

[0010] The rotational speed of the roller is 120-150 r / min.

[0011] The conveyor belt is connected to the mixing pipe via an inclined guide tube. The guide tube has a trough-shaped structure and an opening at the bottom of the mixing chamber, forming the output end of the conveyor belt.

[0012] The inner wall of the mixing chamber is also provided with a wedge-shaped first guide plate and a second guide plate. The first guide plate is located below the opening of the guide tube. Glass fibers entering the mixing chamber along the opening slide towards the roller with the help of the first guide plate. The second guide plate is located below the output end of the discharge pipe. Cotton lint fibers entering the mixing chamber along the discharge pipe slide towards the roller with the help of the second guide plate.

[0013] The output end of the spray gun is located between the opening of the guide tube and the first guide plate, and the output end of the spray gun faces the roller.

[0014] A method for preparing glass fiber base paper sandwich pulp, the method comprising the following steps:

[0015] S1. Pulping the cotton fibers, and then filtering and rinsing the resulting pulp.

[0016] S201. Place the glass fiber onto the conveyor belt. The glass fiber enters the mixing chamber through the conveyor belt. Spray the adhesive onto the glass fiber entering the mixing chamber using the spray gun.

[0017] S202. Open the discharge valve of the discharge pipe, and the cotton linter fibers fall into the mixing chamber and form a suspension or adhere to the inner wall of the mixing chamber.

[0018] S203. Start the roller to rotate. The glass fiber rebounds and hits the inner wall of the mixing chamber with the centrifugal force generated by the rotation of the roller. During the rebound, the glass fiber comes into contact with the cotton linter fiber in the mixing chamber. The cotton linter fiber adheres to the surface of the glass fiber to form modified glass fiber.

[0019] S3. Close the discharge valve and roller, disassemble the collection tank and put the modified glass fiber in the collection tank into the slurry obtained in step S1, and stir evenly to obtain a mixed slurry;

[0020] S4. The mixed pulp is formed on a paper machine and dried to obtain the base paper.

[0021] The beneficial effects of this invention are:

[0022] 1. In this invention, cotton linters are adhered to the surface of glass fibers to form modified glass fibers. The modified glass fibers have a sandwich structure, and the cotton linters adhered to their surface form the "tentacles" of the modified glass fibers. Since the cotton linters adhere to each other and are well bonded, the shorter cotton linters hold the cotton fibers in the pulp, thereby achieving a high degree of bonding between the modified glass fibers and the pulp. At the same time, the ends of the cotton linters tend to approach the pulp, causing the modified glass fibers protruding from the pulp sheet surface to tilt and adhere to the pulp sheet surface, ensuring a uniform distribution of modified glass fibers in the pulp. This eliminates the need for a polishing process and further improves the performance of the base paper.

[0023] 2. This invention provides a device in which glass fibers are placed on a conveyor belt and fall into a mixing chamber. Then, an adhesive (such as textile glue) is sprayed onto the surface of the glass fibers using a spray gun. Simultaneously, cotton linters are fed into the mixing chamber through a feeding pipe, and the rollers are activated. The cotton linters fill the mixing chamber. Due to their weight, the glass fibers rebound under the centrifugal force generated by the rotation of the rollers and collide with the inner wall of the mixing chamber, then rebound back onto the rollers. This process is repeated, with the glass fibers falling in an arc trajectory and fully contacting the cotton linters in the mixing chamber. This ensures that each glass fiber surface is coated with cotton linters to form modified glass fibers. Finally, the modified glass fibers fall into a collection tank, where workers add them to the slurry for mixing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a top view of the mixing chamber.

[0026] Figure 3 for Figure 1 Enlarged diagram of the middle skirt edge 9;

[0027] In the attached diagram, 1 is the frame, 2 is the conveyor belt, 3 is the discharge pipe, 4 is the mixing pipe, 5 is the spray gun, 6 is the roller, 7 is the motor, 8 is the collection tank, 9 is the skirt, 10 is the guide tube, 11 is the first guide plate, and 12 is the second guide plate. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] Specific embodiments, such as Figure 1-3As shown, the present invention provides a device for preparing glass fiber base paper sandwich pulp, including a frame 1 and a conveyor belt 2, a discharge pipe 3 and a mixing pipe 4 disposed on the frame 1. The output end of the conveyor belt 2 and the output end of the discharge pipe 3 are respectively connected to the mixing chamber of the mixing pipe 4. Glass fiber and cotton lint fiber fall into the mixing chamber by means of the conveyor belt 2 and the discharge pipe 3, respectively. The mixing chamber is also provided with a spray gun 5 and a roller 6. Adhesive is sprayed onto the surface of glass fiber by means of the spray gun 5. The roller 6 is rotated by means of a motor 7 fixed to the frame 1. The cotton lint fiber is mixed with glass fiber in the mixing chamber and adheres to the surface of glass fiber by means of the rotation of the roller 6. The output end of the mixing pipe 4 is also fixed with a collection tank 8.

[0030] In the current process of preparing steel paper base paper, 5%-10% glass fiber is usually added to the pulp to improve the strength of the base paper. However, glass fiber is needle-shaped and has a smooth surface. During the papermaking process, the bonding degree between glass fiber and cotton fiber pulp is low. Glass fiber may penetrate through the surface of the pulp sheet formed by papermaking, resulting in a rough surface of the base paper. The surface of the base paper needs to be polished, which increases the number of processes and wastes a certain amount of glass fiber.

[0031] Therefore, in this invention, cotton linters are adhered to the surface of glass fibers to form modified glass fibers. The modified glass fibers have a sandwich structure, and the cotton linters adhered to their surface form the "tentacles" of the modified glass fibers. The shorter cotton linters hold the cotton fibers in the pulp, thereby achieving a high degree of bonding between the modified glass fibers and the pulp. At the same time, the ends of the cotton linters tend to approach the pulp, causing the modified glass fibers protruding from the pulp sheet surface to tilt and adhere to the pulp sheet surface. This ensures that the modified glass fibers in the pulp are evenly distributed, eliminating the need for a polishing process and further improving the performance of the base paper.

[0032] To achieve the preparation of the modified glass fiber, this invention provides an apparatus. In use, glass fibers are placed on a conveyor belt 2 and fall into a mixing chamber. Then, an adhesive (such as textile glue) is sprayed onto the surface of the glass fibers using a spray gun 5. Simultaneously, the feed pipe 3 is opened to feed cotton linters into the mixing chamber, and the roller 6 is activated. The cotton linters fill the mixing chamber. Due to its own weight, the glass fibers rebound under the centrifugal force generated by the rotation of the roller 6 and collide with the inner wall of the mixing chamber, then rebound again onto the roller 6. This process repeats, with the glass fibers falling in an arc trajectory and fully contacting the cotton linters in the mixing chamber. This ensures that each glass fiber surface is coated with cotton linters to form modified glass fibers. Finally, the modified glass fibers fall into a collection tank 8, which is then added to the slurry for mixing.

[0033] The roller 6 is arranged vertically, and the sidewall of the roller 6 is provided with a stepped multi-level annular skirt 9. The size of the skirt 9 increases from top to bottom. Since glass fiber and cotton linter fiber will generate unloading force with each rebound, shortening the maximum rebound path of the two, in order to ensure that glass fiber and cotton linter fiber can rebound onto the roller 6 each time, the surface of the roller 6 in this invention is also provided with a stepped skirt 9, so that the distance between the roller 6 and the inner wall of the mixing chamber gradually shortens from top to bottom.

[0034] The upper surface of the skirt 9 is inclined upward from the inside out, and the angle between the upper surface of the skirt 9 and the horizontal plane is 10-15°. By setting the angle of the upper surface of the skirt 9, when the glass fiber and cotton linter fiber rebound from the roller 6 to the inner wall of the mixing chamber, the initial rebound angle of the two is inclined upward, thereby reducing the height difference between the end point and the starting point during this rebound process, increasing the number of rebounds, and enabling the glass fiber and cotton linter fiber to achieve contact as many times as possible in the mixing chamber.

[0035] The glass fiber has a diameter of 10-15 μm, and the cotton linter fiber has a diameter of 3-5 μm. The diameter of the cotton linter fiber should be smaller than that of the glass fiber to ensure that more cotton linter fibers can adhere to the surface of the glass fiber.

[0036] The rotational speed of the roller 6 is 120-150 r / min.

[0037] The conveyor belt 2 is connected to the mixing pipe 4 via an inclined conduit 10. The conduit 10 has a trough-shaped structure and is located at the bottom of the mixing chamber with an opening that forms the output end of the conveyor belt 2. In order to prevent glass fiber and cotton linter fiber from entering the conduit 10 and flying into the outside air during the rebound process, which could cause workers to inhale the fibers and affect their health, the present invention sets the opening of the conduit 10 at the bottom of the conduit 10, thereby preventing glass fiber and cotton linter fiber from rebounding into the conduit 10.

[0038] The inner wall of the mixing chamber is also provided with a wedge-shaped first guide plate 11 and a second guide plate 12. The first guide plate 11 is located below the opening of the guide tube 10. Glass fibers entering the mixing chamber along the opening slide towards the roller 6 with the help of the first guide plate 11. The second guide plate 12 is located below the output end of the discharge pipe 3. Cotton lint fibers entering the mixing chamber along the discharge pipe 3 slide towards the roller 6 with the help of the second guide plate 12. Since the glass fibers fall downward along the opening of the guide tube 10, the first guide plate 11 can guide the glass fibers, causing them to slide towards and hit the roller 6, thereby creating a rebound. Similarly, the second guide plate 12 is provided below the discharge pipe 3 to guide the cotton lint fibers.

[0039] The output end of the spray gun 5 is located between the opening of the guide tube 10 and the first guide plate 11. The output end of the spray gun 5 faces the roller 6. When the spray gun 5 sprays the adhesive, it imparts a certain impact force to the adhesive. This impact force can provide a horizontal external force to the vertically falling glass fiber, thereby helping the glass fiber hit the roller 6 and form a rebound. In addition, the nozzle of the spray gun 5 is an atomizing nozzle.

[0040] A method for preparing glass fiber base paper sandwich pulp, the method comprising the following steps:

[0041] S1. Pulping the cotton fibers, and then filtering and rinsing the resulting pulp.

[0042] S201. Place the glass fiber onto the conveyor belt 2. The glass fiber enters the mixing chamber through the conveyor belt 2. Spray gun 5 sprays adhesive onto the glass fiber entering the mixing chamber.

[0043] S202. Open the discharge valve of the discharge pipe 3, and the cotton lint fibers fall into the mixing chamber and form a suspension or adhere to the inner wall of the mixing chamber.

[0044] S203. Start roller 6 to rotate. Glass fiber rebounds and hits the inner wall of the mixing chamber with the centrifugal force generated by the rotation of roller 6. During the rebound process, glass fiber comes into contact with cotton linter fiber in the mixing chamber. Cotton linter fiber adheres to the surface of glass fiber to form modified glass fiber.

[0045] S3. Close the discharge valve and roller 6, disassemble the collection tank 8 and put the modified glass fiber in the collection tank 8 into the slurry obtained in step S1, and stir evenly to obtain a mixed slurry;

[0046] S4. The mixed pulp is formed on a paper machine and dried to obtain the base paper.

[0047] In this invention, the conveyor belt 2 is a vibrating conveyor. The vibration of the vibrating conveyor can spread the glass fiber evenly on the surface of the belt, so that the glass fiber falls evenly into the mixing chamber and is sprayed with adhesive, ensuring that the adhesive can adhere to the surface of each glass fiber.

Claims

1. An apparatus for preparing glass fiber base paper sandwich pulp, characterized in that, The system includes a frame (1) and a conveyor belt (2), a discharge pipe (3) and a mixing pipe (4) mounted on the frame (1). The output ends of the conveyor belt (2) and the discharge pipe (3) are respectively connected to the mixing chamber of the mixing pipe (4). Glass fiber and cotton lint fiber fall into the mixing chamber by means of the conveyor belt (2) and the discharge pipe (3). The mixing chamber is also equipped with a spray gun (5) and a roller (6). Adhesive is sprayed onto the surface of glass fiber by means of the spray gun (5). The roller (6) rotates by means of a motor (7) fixed to the frame (1). The cotton lint fiber mixes with the glass fiber in the mixing chamber and adheres to the surface of the glass fiber by means of the rotation of the roller (6). The output end of the mixing pipe (4) is also fixed with a collection trough (8). The roller (6) is arranged in a vertical direction, and the side wall of the roller (6) is provided with a multi-level annular skirt (9) in a stepped shape, and the size of the skirt (9) increases from top to bottom; The upper surface of the skirt (9) is inclined upward from the inside out, and the angle between the upper surface of the skirt (9) and the horizontal plane is 10-15°.

2. The apparatus for preparing glass fiber base paper sandwich pulp according to claim 1, characterized in that, The glass fiber has a diameter of 10-15 μm, and the cotton linter fiber has a diameter of 3-5 μm.

3. The apparatus for preparing glass fiber base paper sandwich pulp according to claim 1, characterized in that, The rotational speed of the roller (6) is 120-150 r / min.

4. The apparatus for preparing glass fiber base paper sandwich pulp according to claim 1, characterized in that, The conveyor belt (2) is connected to the mixing pipe (4) by means of an inclined conduit (10). The conduit (10) has a trough-shaped structure and is located at the bottom of the mixing chamber with an opening to form the output end of the conveyor belt (2).

5. The apparatus for preparing glass fiber base paper sandwich pulp according to claim 4, characterized in that, The inner wall of the mixing chamber is also provided with a wedge-shaped first guide plate (11) and a second guide plate (12). The first guide plate (11) is located below the opening of the guide tube (10). Glass fibers entering the mixing chamber along the opening slide towards the roller (6) with the help of the first guide plate (11). The second guide plate (12) is located below the output end of the discharge pipe (3). Cotton lint fibers entering the mixing chamber along the discharge pipe (3) slide towards the roller (6) with the help of the second guide plate (12).

6. The apparatus for preparing glass fiber base paper sandwich pulp according to claim 5, characterized in that, The output end of the spray gun (5) is located between the opening of the guide tube (10) and the first guide plate (11), and the output end of the spray gun (5) faces the roller (6).

7. A method for preparing glass fiber base paper sandwich pulp, characterized in that, The system includes a frame (1) and a conveyor belt (2), a discharge pipe (3) and a mixing pipe (4) mounted on the frame (1). The output ends of the conveyor belt (2) and the discharge pipe (3) are respectively connected to the mixing chamber of the mixing pipe (4). Glass fiber and cotton lint fiber fall into the mixing chamber by means of the conveyor belt (2) and the discharge pipe (3). The mixing chamber is also equipped with a spray gun (5) and a roller (6). Adhesive is sprayed onto the surface of glass fiber by means of the spray gun (5). The roller (6) rotates by means of a motor (7) fixed to the frame (1). The cotton lint fiber mixes with the glass fiber in the mixing chamber and adheres to the surface of the glass fiber by means of the rotation of the roller (6). The output end of the mixing pipe (4) is also fixed with a collection trough (8). The preparation method includes the following steps: S1. Pulping the cotton fibers, and then filtering and rinsing the resulting pulp. S201. Place the glass fiber on the conveyor belt (2). The glass fiber enters the mixing chamber through the conveyor belt (2). Spray gun (5) sprays adhesive towards the glass fiber entering the mixing chamber. S202. Open the discharge valve of the discharge pipe (3) and the cotton lint fibers fall into the mixing chamber to form suspension or adhere to the inner wall of the mixing chamber. S203, the starting roller (6) rotates, and the glass fiber rebounds and hits the inner wall of the mixing chamber by the centrifugal force generated by the rotation of the roller (6). During the rebound process, the glass fiber comes into contact with the cotton lint fiber in the mixing chamber, and the cotton lint fiber adheres to the surface of the glass fiber to form modified glass fiber. S3. Close the discharge valve and roller (6), disassemble the collection tank (8) and put the modified glass fiber in the collection tank (8) into the slurry obtained in step S1, and stir evenly to obtain a mixed slurry; S4. The mixed pulp is formed on a paper machine and dried to obtain the base paper.

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