Electrostatic base paper and manufacturing method thereof

Abstract

The invention discloses electrostatic body paper and a manufacturing method thereof, and relates to the technical field of electrostatic body paper manufacturing. An upper roller for sizing the front surface of raw paper is arranged on the machine frame, a first stock bin is fixedly connected to the machine frame, a feeding assembly is arranged on the first stock bin, an adjustable lower roller is arranged on the first stock bin, and the upper roller and the lower roller can rotate. Through cooperative use of the upper roller, the lower roller and the feeding assembly, the two faces of paper can be subjected to sizing treatment, and the surface bonding strength performance of the paper is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrostatic base paper manufacturing, in particular to an electrostatic base paper and a manufacturing method thereof. Background Art

[0002] At present, the main technical problems of electrostatic copy paper on the market are as follows: 1. Poor flatness: The flatness of electrostatic copy paper is crucial to the printing and copying effects. If the flatness of the paper is poor, it will not only affect the printing effect, but also cause problems such as paper jams. This may be caused by improper process control of the paper during the production process, or unreasonable raw material ratio. 2. Large difference between the two sides: The difference between the two sides refers to the difference in texture, color, gloss, etc. between the front and back of the paper. If the difference between the two sides is large, it will affect the uniformity and consistency of printing or copying. This may be caused by uneven heating or force on both sides of the paper during the production process. 3. Poor machine performance: Machine performance refers to the smoothness of paper when passing through the printer or copier. If the machine performance is poor, it may cause problems such as paper jams and multiple paper feeds. This may be caused by the physical properties of the paper such as stiffness, thickness or surface friction that do not meet the requirements of the equipment. 4. Poor uniformity: Uniformity refers to the uniformity of fiber distribution on the surface of the paper. If the uniformity is poor, it will cause problems such as spots and stripes in the printing or copying effect. This may be caused by unstable raw material quality, improper production process control or improper use of fillers.

[0003] 5. Poor adaptability: Adaptability refers to the compatibility of paper with different printing or copying devices. If the adaptability is poor, it may lead to poor printing or copying results on certain devices. This may be caused by the mismatch between the physical properties of the paper (such as thickness, stiffness, surface roughness, etc.) and the requirements of the device.

[0004] In addition, the Chinese patent with publication number CN210826926U discloses a paper surface glue machine, including a mobile platform and a glue feeding hopper located in its inner cavity, the inner cavity of the mobile platform is provided with a transmission shaft, a conveyor belt and a passive shaft, and a motor is fixedly welded on its outer wall, the transmission shaft penetrates the side wall of the mobile platform and is connected to the motor by transmission, the conveyor belt and the transmission shaft are respectively located on both sides of the passive shaft, and the two sides of the conveyor belt are respectively connected to the two sides of the inner cavity of the mobile platform by transmission; the inner cavity of the mobile platform is provided with multiple groups of evenly arranged horizontal brackets, the center of the inner cavity is provided with a horizontal shaft and a roller, and both sides of the top wall of the mobile platform are provided with vertical slots. The paper surface glue machine, by setting a horizontal bracket, a mounting seat and a positioning wheel, when the paper moves on the conveyor belt, it will contact the positioning wheels under the multiple groups of horizontal brackets, so that the paper is flattened on the conveyor belt, so that the paper will hardly be lifted, so that the effect of gluing on the paper is better. However, the existing device has defects when used. The existing device can only apply glue to one side of the paper, and the surface bonding strength performance of the paper needs to be improved. Summary of the invention

[0005] The present invention aims to solve the technical problems existing in the prior art; to this end, the present invention provides an electrostatic base paper and a manufacturing method thereof.

[0006] The purpose of the present invention can be achieved through the following technical solutions: An electrostatic base paper and a method for manufacturing the same, comprising the following steps: Step 1: Use a pulper to break up the raw materials, use a conical refiner to beat the pulp to obtain a pulped slurry, and then mix the slurry to prepare a double-collage base paper.

[0007] Step 2: prepare glue solution and filter the glue solution, and use a glue applying mechanism to apply glue to the front and back sides of the base paper.

[0008] Step 3: Dry the base paper after sizing, and then calender it through a super calender to improve the surface smoothness and strength of the paper.

[0009] As a further solution of the present invention: the glue applying mechanism includes a frame.

[0010] The frame is provided with an upper roller for applying glue to the front side of the base paper, the frame is fixedly connected with a silo one, the silo one is provided with a feeding assembly, the silo one is provided with an adjustable lower roller, and both the upper roller and the lower roller are capable of rotating.

[0011] As a further solution of the present invention: a second silo is fixedly connected to the frame, the upper roller is attached to the discharge port of the second silo, and a fixing frame is fixedly connected to the bottom of the first silo.

[0012] As a further solution of the present invention: the feeding assembly includes an electric push rod 1 fixedly connected to a fixed frame, the output end of the electric push rod 1 is fixedly connected to a piston, the piston is slidably connected to a silo 1, and the top of the piston is arranged to be concave.

[0013] As a further solution of the present invention: a fixed seat which can move up and down is arranged on the first silo, an electric push rod 2 is fixedly connected to one side of the first silo, and a connecting plate for driving the fixed seat to move is fixedly connected to the second electric push rod.

[0014] As a further solution of the present invention: two support rods are fixedly connected to one side of the silo, and the two support rods are slidably connected to the connecting plate.

[0015] As a further solution of the present invention: a groove 1 is provided on one side of the top of the silo 1, and the groove 1 is composed of a trough body 1 and a trough body 2. The bottom of the trough cavity of the trough body 1 is arranged to be an inclined surface. A slot 1 connected to the groove 1 is provided on the silo 1, and a positionable baffle 1 is provided in the groove 1, and the baffle 1 is slidably connected to the groove 1.

[0016] As a further solution of the present invention: a limiting plate 1 is fixedly connected to the baffle 1, and the limiting plate 1 is slidably connected to the clamping slot 1.

[0017] As a further solution of the present invention: a groove 2 is provided on the top of the second silo, a slot 2 connected to the second groove is provided on the first silo, a positionable baffle 2 is provided in the second groove, and the baffle 2 is slidably connected to the second groove, a limiting plate 2 is fixedly connected to the second baffle, and the limiting plate 2 is slidably connected to the second slot.

[0018] The invention also discloses an electrostatic base paper, comprising a base paper body, with glue layers bonded to both sides of the base paper body.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. This application can effectively solve the problems of electrostatic copy paper in terms of flatness, two-side difference, machine performance, uniformity and adaptability through comprehensive improvement measures in the process.

[0020] 2. The present application can apply glue to both sides of the paper through the coordinated use of the upper roller, the lower roller and the feeding assembly, thereby improving the surface bonding strength performance of the paper.

[0021] 3. This application uses the electric push rod 2, the connecting plate, the screw rod, the rack and the gear to adjust the height of the lower roller, which is not only beneficial for paper placement, but also for gluing papers of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a first perspective stereogram of the present invention; Figure 2 It is a second viewing angle stereogram of the present invention; Figure 3 It is a stereoscopic view of the first silo, the lower roller and the feeding assembly of the present invention; Figure 4 It is a three-dimensional cross-sectional view of a silo 1 of the present invention; Figure 5 It is a stereoscopic diagram of the silo 1 and the feeding assembly of the present invention; Figure 6 For the present invention Figure 5 A partial enlarged view of the middle A; Figure 7 It is a three-dimensional cross-sectional view of the second silo of the present invention; Figure 8 This is a disassembled diagram of the second silo and the second baffle of the present invention; Fig. 9 It is a schematic structural diagram of the base paper body of the present invention.

[0023] In the figure: 1. frame; 2. upper roller; 3. hopper 1; 4. feeding assembly; 41. electric push rod 1; 42. piston; 5. lower roller; 6. hopper 2; 7. fixed frame; 8. motor 1; 9. fixed seat; 10. electric push rod 2; 11. connecting plate; 12. bottom plate; 13. screw rod; 14. motor 2; 15. rack; 16. gear; 17. support rod; 18. groove 1; 19. slot 1; 20. baffle 1; 21. iron plate 1; 22. iron plate 2; 23. limit plate 1; 24. magnetic plate 1; 25. groove 2; 26. slot 2; 27. baffle 2; 28. limit plate 2; 29. ​​magnetic plate 2; 30. iron plate 3; 31. iron plate 4; 32. base paper body; 33. glue layer. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0025] See also Figure 1-Figure 8 As shown, the present application provides an electrostatic base paper and a method for manufacturing the same, comprising the following steps: Step 1: using a pulper to crush the raw materials, using a conical refiner to beat the pulp to obtain a pulped slurry, and then proportioning the slurry to prepare a double-collage base paper; Specifically: Refining: Bleached kraft softwood pulp board and bleached kraft hardwood pulp board were broken in pulpers respectively. Chemical thermomechanical pulp was provided by our pulp mill. NBKP, LBKP and BCTMP were all pulped by RF-4i conical refiner. The NBKP refining line used three conical refiners in series (one line). The first and second machines used JC04-LF type refiners, and the third machine used JC04-MXF type refiner. The LBKP refining line used two conical refiners in series (three lines). The first machine used JC04-SF type refiner, and the second machine used JC04-MF type refiner. The BCTMP refining line used two conical refiners in series (one line). The first machine used JC04-SF type refiner, and the second machine used JC04-MF type refiner. The pulped slurry was obtained. The pulping quality and freeness were: NBKP: 330±20 LBKP: 390±10 BCTMP: 300±20; wet weight of mixed slurry: NBKP: 11.5g LBKP: 1.5g BCTMP: 1.3g.

[0026] papermaking: 15% bleached kraft conifer pulp, 50% bleached kraft broadleaf pulp, 35% thermomechanical poplar pulp wet pulp by mass ratio; GCC:PCC=1:1 mixed, solid content 43%, relative pulp absolute dry ratio 160kg / ton pulp; CPAM450ppm / ton pulp, APAM400ppm / ton pulp, silica 4kg / ton pulp, dye 100ppm / ton pulp, dye 85ppm / ton pulp, disulfone OBA 15kg / ton pulp, PAC 5kg / ton pulp, cationic corn starch 13kg / ton pulp, ASA 1.1kg / ton pulp is mixed evenly and passed through Valmet's double-nip roller vertical nip former and Voith's forming wire to form wet paper, Valmet's double shoe press for dehydration, Voith's felt cloth, single-row drying cylinder drying, Aston Johnson dryer wire, double-circulation steam recovery system, and the main steam pressure of the front drying is 3.5bar to prepare double-collage base paper; the machine speed is 1700m / min.

[0027] Step 2: preparing glue solution and filtering the glue solution, and applying glue to the front and back sides of the base paper using a glue applying mechanism; Specifically: Preparation of glue: 001) BVG continuous preparation, spiral conveying corn starch, dissolving it in clean water to makedown solid content 26%, adding Buckman amylase 250ppm / ton starch, protein pretreatment agent 25kg / ton starch; starch emulsion conveying, mixed with steam through BVG blow jet into digster temperature 88℃, reaction for 30 minutes, finished glue after BVG Super-ECC cooking, solid content 22%, viscosity 80cfs; 002) Preparation of surface colloid salt: Add 4000kg of 80℃ hot water and 1000kg of anhydrous sodium sulfate into the surface salt preparation tank, stir at 30rpm for 40 minutes, and discharge into the surface salt storage tank, with a concentration of 20% and a density of 1.15; 003) Glue mixing: 35kg / ton of paper of original glue, 2kg of surface glue salt, 6kg / ton of paper of surface sizing agent, 8kg / ton of paper of hexasulfonic OBA, 50% of 80℃ dilution water for glue flow, through the pipeline multi-plate static mixer, into the sizing machine work tank, with solid content of 12% and viscosity of 13cfs; 004) Glue filtration: starch emulsion is filtered through a 100-mesh filter, glue is filtered through a 120-mesh filter, mixed glue is filtered through a 100-mesh filter, the glue machine feed is passed through a 120-mesh, 560mm diameter slotted self-cleaning scraper pressure screen (10s / h), glue machine return is screened through a 100-mesh square vibrating screen, good material is returned to the work tank, and slag is discharged into the ditch.

[0028] Gluing: The upper roller 2 and the lower roller 5 on the film transfer sizing machine are used to dip the glue liquid when rotating, and the glue liquid is applied to the base paper through the rotation of the upper roller 2 and the lower roller 5 to achieve gluing on the front and back of the base paper. The BU-coated glue roller, the line pressure of the glue roller is 70KN.M, the metering rod model is BTG-0325, the line pressure is 150kpa, the gluing temperature is 70℃, and the glue amount is 1.5g / ㎡. The dryness of the single-sided base paper before the film transfer sizing machine is 96%, and the dryness of the finished paper after the film transfer sizing machine is 75%.

[0029] Step 3: Dry the base paper after sizing, and then calender it through a super calender to improve the surface smoothness and strength of the paper.

[0030] Specifically: drying: The first two groups of single-row drying cylinders, the last two groups of double-row drying cylinders, double-circulation steam, the main steam pressure of the rear drying cylinder is 0.6 bar.

[0031] Calendering: Double hot roller soft calendering, upper roller steel rod, lower roller rubberized soft roller, line pressure 90KN.M, temperature 120℃; the profile of the scanning frame can be used to control the banner and the pressure distribution can be adjusted at a single point to ensure the stability of paper thickness and smoothness. Embodiment 2

[0032] Based on Example 1, see Figure 1-Figure 8 shown.

[0033] The glue application mechanism comprises a frame 1; The frame 1 is provided with an upper roller 2 for applying glue to the front side of the base paper, the frame 1 is fixedly connected with a silo 3, the silo 3 is provided with a feeding assembly 4, the silo 3 is provided with an adjustable lower roller 5, the upper roller 2 and the lower roller 5 are both rotatable, and a gap is provided between the lower roller 5 and the silo 3. The setting of the gap is conducive to the feeding assembly 4 to push the glue in the silo 3, avoiding the formation of a closed space in the silo 3, which makes the feeding assembly 4 unable to be pushed. Turn on the motor 1 8 and the motor 2 14 to drive the upper roller 2 and the lower roller 5 to rotate. At the same time, the traction equipment is used to drive the paper to move. When the upper roller 2 rotates, the glue inside the silo 2 6 will flow to the surface of the upper roller 2. As the upper roller 2 rotates, the glue will be applied to the paper. When the lower roller 5 rotates, the electric push rod 1 41 will drive the piston 42 to rise to ensure that the liquid level of the glue inside the silo 3 contacts the lower roller 5. When the lower roller 5 rotates, the glue will be applied to the paper, so that both sides of the paper can be glued, thereby improving the surface bonding strength performance of the paper.

[0034] A silo 2 6 is fixedly connected to the frame 1, the upper roller 2 is attached to the discharge port of the silo 2 6, a fixing frame 7 is fixedly connected to the bottom of the silo 1 3, a motor 1 8 is fixedly connected to the frame 1, and the motor 1 8 and the upper roller 2 are fixedly connected.

[0035] The feeding assembly 4 includes an electric push rod 41 fixedly connected to the fixing frame 7, the electric push rod 41 is electrically connected to an external power supply and is controlled by an external control program, a piston 42 is fixedly connected to the output end of the electric push rod 41, the piston 42 is slidably connected to the silo 3, and the top of the piston 42 is concave.

[0036] A groove 18 is provided on one side of the top of the silo 3, and the groove 18 consists of a trough body 1 and a trough body 2. The bottom of the trough cavity of the trough body 1 is arranged in an inclined surface. A slot 19 connected to the groove 18 is provided on the silo 3, and a positionable baffle 20 is provided in the groove 18, and the baffle 20 is slidably connected to the groove 18.

[0037] The baffle plate 20 is fixedly connected with a limit plate 23, and the limit plate 23 is slidably connected with the slot 19. The baffle plate 20 is fixedly connected with an iron plate 21 and an iron plate 22, and the top of the silo 3 is fixedly connected with a magnetic plate 24.

[0038] A groove 25 is provided on the top of the silo 2 6, a slot 26 connected to the groove 25 is provided on the silo 1 3, a positionable baffle 27 is provided in the groove 25, and the baffle 27 is slidably connected to the groove 25, a limit plate 28 is fixedly connected to the baffle 27, the limit plate 28 is slidably connected to the slot 26, a magnetic plate 29 is fixedly connected to the baffle 27, and an iron plate 3 30 and an iron plate 4 31 are fixedly connected to the top of the silo 2 6. Before gluing the paper, the magnetic plate 2 29 is moved to separate the magnetic plate 2 29 from the iron plate 4 31, and then the baffle 27 is driven to move and the magnetic plate 29 is made to fit with the iron plate 3 30. At this time, glue liquid can be added to the silo 2 6; the iron plate 1 21 is moved to separate the iron plate 22 from the magnetic plate 1 24, and then the baffle 1 20 is driven to move and the iron plate 1 21 is made to fit with the magnetic plate 1 24. Then, glue liquid can be added to the silo 3. Embodiment 3

[0039] Based on Example 1, see Figure 1-Figure 3 shown.

[0040] The silo 13 is provided with a fixed seat 9 which can move up and down, and one side of the silo 13 is fixedly connected with an electric push rod 2 10, which is electrically connected to an external power supply and controlled by an external control program, and the electric push rod 2 10 is fixedly connected with a connecting plate 11 for driving the fixed seat 9 to move, and the front and back sides of the silo 13 are fixedly connected with a bottom plate 12, and the top of the bottom plate 12 is rotatably connected with a screw rod 13, and the screw rod 13 is threadedly connected to the fixed seat 9, and the fixed seat 9 is rotatably connected to the lower roller 5, and the fixed seat 9 is provided with a motor 2 14 for driving the lower roller 5 to rotate, and a rack 15 is fixedly connected to the connecting plate 11, and a gear 16 meshing with the rack 15 is fixedly connected to the outer surface of the screw rod 13. By turning on the electric push rod 10, the connecting plate 11 is driven to move, thereby driving the rack 15, and then the meshing transmission between the rack 15 and the gear 16 is utilized to drive the screw rod 13 to rotate, thereby driving the fixed seat 9 to descend, and then the paper is placed on the lower roller 5, and then the lower roller 5 is lifted up, and the paper is made to fit the lower roller 5 and the upper roller 2.

[0041] Two support rods 17 are fixedly connected to one side of the silo 1 3 , and the two support rods 17 are both slidably connected to the connecting plate 11 . Embodiment 4

[0042] In combination with Embodiment 1, Embodiment 2 and Embodiment 3, see Fig. 9 shown.

[0043] An electrostatic base paper comprises a base paper body 32, with glue layers 33 bonded to two sides of the base paper body 32.

[0044] The working principle of the present invention is as follows: by turning on the electric push rod 10, the connecting plate 11 is driven to move, thereby driving the rack 15, and then the meshing transmission between the rack 15 and the gear 16 is utilized to drive the screw rod 13 to rotate, thereby driving the fixed seat 9 to descend, and then the paper is placed on the lower roller 5, and then the lower roller 5 is lifted up, and the paper is made to fit with the lower roller 5 and the upper roller 2. Afterwards, motor 1 8 and motor 2 14 are turned on to drive the upper roller 2 and the lower roller 5 to rotate. At the same time, the traction equipment is used to drive the paper to move. When the upper roller 2 rotates, the glue inside the silo 2 6 will flow to the surface of the upper roller 2. As the upper roller 2 rotates, the glue will be applied to the paper. When the lower roller 5 rotates, the electric push rod 1 41 will drive the piston 42 to rise to ensure that the liquid level of the glue inside the silo 3 contacts the lower roller 5. When the lower roller 5 rotates, the glue will be applied to the paper, so that both sides of the paper can be glued, thereby improving the surface bonding strength performance of the paper. Before gluing the paper, the magnetic plate 2 29 is moved to separate the magnetic plate 2 29 from the iron plate 4 31, and then the baffle 27 is driven to move and the magnetic plate 29 is made to fit with the iron plate 3 30. At this time, glue liquid can be added to the silo 2 6; the iron plate 1 21 is moved to separate the iron plate 22 from the magnetic plate 1 24, and then the baffle 1 20 is driven to move and the iron plate 1 21 is made to fit with the magnetic plate 1 24. Then, glue liquid can be added to the silo 3.

[0045] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A method for manufacturing electrostatic base paper, characterized in that: The following steps are involved: Step 1: using a pulper to crush the raw materials, using a conical refiner to pulp to obtain a pulped slurry, and then proportioning the slurry to prepare a double-collage base paper; Step 2: preparing glue solution and filtering the glue solution, and applying glue to the front and back sides of the base paper using a glue applying mechanism; Step 3: Dry the base paper after sizing, and then calender it through a super calender to improve the surface smoothness and strength of the paper.

2. The method for manufacturing an electrostatic base paper according to claim 1, characterized in that: The glue application mechanism comprises a frame (1); The frame (1) is provided with an upper roller (2) for applying glue to the front side of the base paper, the frame (1) is fixedly connected with a silo (3), the silo (3) is provided with a feeding assembly (4), the silo (3) is provided with an adjustable lower roller (5), and the upper roller (2) and the lower roller (5) are both rotatable.

3. The method for manufacturing an electrostatic base paper according to claim 2, characterized in that: A second silo (6) is fixedly connected to the frame (1), the upper roller (2) is fitted at the discharge port of the second silo (6), and a fixing frame (7) is fixedly connected to the bottom of the first silo (3).

4. The method for manufacturing an electrostatic base paper according to claim 3, characterized in that: The feeding assembly (4) comprises an electric push rod (41) fixedly connected to a fixing frame (7); a piston (42) is fixedly connected to the output end of the electric push rod (41); the piston (42) is slidably connected to the silo (3); and the top of the piston (42) is arranged to be concave.

5. The method for manufacturing electrostatic base paper according to claim 4, characterized in that: The first silo (3) is provided with a fixed seat (9) that can move up and down, and one side of the first silo (3) is fixedly connected to a second electric push rod (10), and the second electric push rod (10) is fixedly connected to a connecting plate (11) for driving the fixed seat (9) to move.

6. The method for manufacturing electrostatic base paper according to claim 5, characterized in that: Two support rods (17) are fixedly connected to one side of the silo (3), and the two support rods (17) are slidably connected to the connecting plate (11).

7. The method for manufacturing electrostatic base paper according to claim 6, characterized in that: A groove (18) is provided on one side of the top of the silo (3), and the groove (18) is composed of a trough body (1) and a trough body (2). The bottom of the trough cavity of the trough body (1) is arranged in an inclined surface. A clamping groove (19) connected to the groove (18) is provided on the silo (3), and a positionable baffle (20) is provided in the groove (18), and the baffle (20) is slidably connected to the groove (18).

8. The method for manufacturing electrostatic base paper according to claim 7, characterized in that: The baffle plate 1 (20) is fixedly connected to a limiting plate 1 (23), and the limiting plate 1 (23) is slidably connected to the clamping slot 1 (19).

9. The method for manufacturing electrostatic base paper according to claim 8, characterized in that: A second groove (25) is provided on the top of the second material bin (6), a second clamping groove (26) connected to the second groove (25) is provided on the first material bin (3), a second positionable baffle (27) is provided in the second groove (25), and the second baffle (27) is slidably connected to the second groove (25), a second limiting plate (28) is fixedly connected to the second baffle (27), and the second limiting plate (28) is slidably connected to the second clamping groove (26).

10. An electrostatic base paper, prepared by the method for manufacturing electrostatic base paper according to claim 9, characterized in that: It comprises a base paper body (32), with glue layers (33) bonded to both sides of the base paper body (32).

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