CN113334862A - Production process of multilayer composite environment-friendly heavy corrugated board - Google Patents
Production process of multilayer composite environment-friendly heavy corrugated board Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 239000000853 adhesive Substances 0.000 claims abstract description 87
- 230000001070 adhesive effect Effects 0.000 claims abstract description 87
- 239000004831 Hot glue Substances 0.000 claims abstract description 4
- 239000000839 emulsion Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 claims abstract description 4
- 239000000123 paper Substances 0.000 claims description 140
- 239000000463 material Substances 0.000 claims description 40
- 229920002472 Starch Polymers 0.000 claims description 36
- 239000008107 starch Substances 0.000 claims description 36
- 235000019698 starch Nutrition 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000010008 shearing Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 150000002632 lipids Chemical class 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 239000012752 auxiliary agent Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 229920003051 synthetic elastomer Polymers 0.000 claims description 10
- 229920003002 synthetic resin Polymers 0.000 claims description 10
- 239000000057 synthetic resin Substances 0.000 claims description 10
- 239000005061 synthetic rubber Substances 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 7
- 229910021538 borax Inorganic materials 0.000 claims description 6
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 6
- 239000004328 sodium tetraborate Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 238000009864 tensile test Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000006072 paste Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 2
- 235000012149 noodles Nutrition 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000005022 packaging material Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000011265 semifinished product Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
Abstract
The invention belongs to the technical field of preparation of environment-friendly packaging materials, in particular to a production process of a multilayer composite environment-friendly heavy corrugated board, aiming at the problems that the corrugated board produced by the existing production process of the corrugated board has poor waterproof performance, the adhesive strength and the side pressure strength of the corrugated board cannot be measured in the production process, and the yield of the produced corrugated board is low, the following scheme is proposed, and the production process comprises the following steps: s1: adhesives are prepared and tested for adhesion, and are classified into water-soluble adhesives, hot-melt adhesives, solvent-based adhesives, emulsion-based adhesives, and solventless liquid adhesives according to the characteristics of use. The invention has reasonable design, can effectively improve the waterproof performance of the corrugated board, prolongs the service life of the corrugated board, can detect the adhesive strength and the edge pressure strength of the corrugated board in a semi-finished product state, improves the yield of the corrugated board and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of preparation of environment-friendly packaging materials, in particular to a production process of a multilayer composite environment-friendly heavy corrugated board.
Background
The corrugated paper package is a package box formed by folding, bonding and other processes of corrugated boards, and has the advantages of environmental protection, easy recycling, easy processing and forming and the like. Along with the rapid development of the e-commerce and express delivery industries, the express delivery package consumption is rapidly increased, and the requirements for corrugated packages and corrugated boards are rapidly increased, so that the related raw materials and energy consumption are correspondingly increased, and the corrugated boards serving as environment-friendly packaging materials are 100% recyclable.
The invention document with the publication number of CN110978643A discloses an energy-saving and environment-friendly corrugated board production process, the waterproof performance of the produced corrugated board is poor, the adhesive strength and the edge pressure strength of the corrugated board cannot be measured in the production process, and the yield of the produced corrugated board is low, so that the production process of the multilayer composite environment-friendly heavy corrugated board is provided, and the problems are solved.
Disclosure of Invention
The invention aims to solve the defects that the corrugated board produced by the existing corrugated board production process has poor waterproof performance, and the finished product rate of the produced corrugated board is not high because the adhesive strength and the edge pressure strength of the corrugated board cannot be measured in the production process, and provides the production process of the multilayer composite environment-friendly heavy corrugated board.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production process of a multilayer composite environment-friendly heavy corrugated board comprises the following steps:
s1: preparing an adhesive and detecting the adhesiveness of the adhesive, wherein the adhesive is divided into a water-soluble adhesive, a hot-melt adhesive, a solvent adhesive, an emulsion adhesive and a solvent-free liquid adhesive according to the use characteristics, and the adhesiveness of the adhesive is detected by rapidly pulling a clean steel ball;
s2: preparing a waterproof layer, wherein the waterproof layer is made of lipid waterproof materials, and because the natural lipid materials are not high in stability and some natural lipids are not environment-friendly, the synthetic lipid materials are used as main materials of the waterproof layer, the prepared waterproof layer is a layer of smooth and transparent film, the size of the film is set according to the size of the corrugated board, and the film is matched with the size of the corrugated board;
s3: the paper tube of the base paper is arranged on the paper frame, the end part of the base paper is led out from the paper frame, the base paper led out from the paper tube is in a tight state, the base paper is prevented from being wrinkled in the moving process and influencing subsequent heating, the base paper is tensioned by a tensioning roller in the moving process, the outer side of the tensioning roller is tightly attached to the base paper, and the tensioning roller can rotate;
s4: the end part of the drawn base paper is attached to a paper guide roller, the base paper is guided to a heating roller for preheating, the outer side of the paper guide roller is tightly attached to the inner side of the base paper, the inner side of the base paper is tightly attached to the outer side of the heating roller, and the heating roller and the paper guide roller can rotate;
s5: conveying the raw paper passing through the heating roller to a single-side machine, pressing into a required corrugated paper core, wherein the corrugation peak of the corrugated paper core is positioned above the corrugated paper core, the opening of the corrugated paper core is positioned below the corrugated paper core, and conveying the prepared corrugated paper core to a corrugating machine;
s6: adding the adhesive braked in the step S1 into a corrugating machine, coating the adhesive on the ridges of the corrugated paper core by using the corrugating machine, adhering surface paper on the ridges of the corrugated paper core, and drying the surface paper and the adhesive on the corrugated paper core by using a dryer to prepare a semi-finished corrugated board;
s7: detecting the bonding strength and the edge pressure strength of the semi-finished corrugated boards, mutually bonding the qualified semi-finished corrugated boards, and drying the corrugated boards by using a dryer in S6 after the corrugated boards are bonded;
s8: the dried corrugated board is conveyed to a longitudinal and transverse shearing machine by a conveying belt for shearing, the power source of the conveying belt is a driving motor, a transmission is connected to an output shaft of the driving motor in a transmission manner, and the transmission is used for adjusting the moving speed of the conveying belt.
S9: cutting the dried semi-finished corrugated board into a finished corrugated board by using a cross shearing machine according to requirements, cleaning scraps generated in the cut finished corrugated board by using a suction fan, and adhering a waterproof layer prepared in S2 on the finished corrugated board;
s10: and drying the waterproof layer adhered to the finished corrugated board by using a dryer, and performing the next process on the dried finished corrugated board.
Preferably, in S1, after comparing the price and performance, the adhesive is a starch adhesive without mixing pungent odor and harmful raw materials, the adhesive itself is environment-friendly, the starch adhesive is a mixture of water, raw starch, cooked starch paste, caustic soda and borax, the ratio of the water to the starch is 80%, the starch is 20% (wherein the raw starch accounts for 85%, the cooked starch accounts for 15%), the caustic soda (the total amount of the starch) is 2.4-2.8% and the borax is 2.7-3.2%, after the starch adhesive is prepared, the starch adhesive is placed in a special barrel for storage, and the stirring speed in the barrel is 20rdm/min, so as to avoid the reduction of the usability of the starch adhesive machine.
Preferably, in S1, the adhesion of the adhesive is detected by a tensile testing machine and a clean steel ball, the size of the clean steel ball is known in advance, the clean steel ball descends at a constant speed of 350mm/min and is stationary on the surface of the adhesive, the tensile testing machine ascends the clean steel ball at a constant speed of 350mm/min and 250-.
Preferably, in the step S2, the synthetic lipid material is mainly made of synthetic rubber and synthetic resin, the other materials are auxiliary agents and filling materials, the part ratio of the synthetic rubber, the synthetic resin, the auxiliary agents and the filling materials is 34:35:23:8, the synthetic rubber, the synthetic resin, the auxiliary agents and the filling materials in equal proportion are added into a barrel, and are stirred at a rotating speed of 300rdm/min for 30-50min to prepare a mixed material, before the mixed material enters a membrane process stage, the mixed material is stirred at a speed of 20rdm/min to avoid the solidification of the mixed material, and then the membrane process is utilized to prepare the waterproof membrane, wherein the permeability of the waterproof membrane is good.
Preferably, in S3, the specification of the base paper is selected according to the requirement, the paper holder is provided with a clamping member for clamping the paper tube, the paper tube can rotate on the clamping member, the tension roller is further connected with an adjusting assembly in a transmission manner for adjusting the position of the tension roller, so that the base paper is constantly in a tightened state, and the power source of the adjusting assembly can be a cylinder of the selected specification.
Preferably, in S4, the preheating temperature of the heating roller is 50-90 ℃, the preheating time is 10-30S, and the contact time between the outer side of the heating roller and the base paper is 3-5S, so that the base paper can be sufficiently heated.
Preferably, in S5, the model of the single-sided machine is SF-360, and the specification of the single-sided machine is: temperature range: 160-180 ℃, gas source: 0.4-0.9 Mpa and steam pressure: 0.8-1.3 Mpa, and the pressurization of the single noodle machine is controlled within 20-40 s.
Preferably, in S6, the specification of the corrugating machine may be the same as that of a single-side machine, two pieces of face paper are selected, the two pieces of face paper are respectively bonded with the top and the bottom of the corrugated paper core by using an adhesive, the type of the dryer may be selected according to actual requirements, the drying temperature of the dryer is 60-120 ℃, and the drying time of the dryer is 20-25S.
Preferably, in S7, the bonding strength and the edge pressure strength of the semi-finished corrugated cardboard are detected by using a compression tester of DYSY-1, the bonding strength is detected by loading a test sample into an accessory, placing the accessory at the center of a lower pressing plate of the compression tester, starting the compression tester of DYSY-1, pressing the accessory with the test sample at a speed of 12.5mm/min until the corrugation peaks and the face paper are separated, and recording the displayed maximum force F, and the edge pressure strength is detected by starting the compression tester of DYSY-1, uniformly pressing the test sample along the corrugation direction at a speed of 12-15mm/min, wherein the pressure per unit length when the test piece is crushed becomes the edge pressure strength of the semi-finished corrugated paper sheet in N/m.
Preferably, in S8, the waterproof layer and the finished corrugated board are bonded by using the adhesive in S1, the type of the cross shearing machine is F3015, the types of the transmission and the driving motor can be selected according to actual requirements, in S9, four suction fans are arranged in a matrix, the four suction fans are installed on the cross shearing machine, chips in the shearing process are sucked by the suction fans, in S10, the drying time of the waterproof layer and the finished corrugated board is 5-10S, and the drying temperature is 40-80 ℃.
According to the production process of the multilayer composite environment-friendly heavy corrugated board, after the corrugated paper core and the surface paper are bonded, the bonding strength and the edge pressure strength of the corrugated paper core and the surface paper are detected, and unqualified semi-finished corrugated boards are reworked;
the waterproof layer is bonded on the outer side of the finished corrugated board, so that the waterproof performance of the corrugated board can be effectively improved, and the service life of the corrugated board is prolonged;
the invention has reasonable design, can effectively improve the waterproof performance of the corrugated board, expand the application range of the corrugated board, prolong the service life of the corrugated board, can detect the adhesive strength and the edge pressure strength of the corrugated board in a semi-finished product state, improve the yield of the corrugated board, reduce the production cost and have strong practicability.
Drawings
Fig. 1 is a flow chart of a production process of a multilayer composite environment-friendly heavy corrugated board provided by the invention.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
A production process of a multilayer composite environment-friendly heavy corrugated board comprises the following steps:
s1: preparing an adhesive and detecting the adhesiveness of the adhesive, wherein the adhesive is divided into a water-soluble adhesive, a hot-melt adhesive, a solvent adhesive, an emulsion adhesive and a solvent-free liquid adhesive according to the use characteristics, and the adhesiveness of the adhesive is detected by rapidly pulling a clean steel ball;
s2: preparing a waterproof layer, wherein the waterproof layer is made of lipid waterproof materials, and because the natural lipid materials are not high in stability and some natural lipids are not environment-friendly, the synthetic lipid materials are used as main materials of the waterproof layer, the prepared waterproof layer is a layer of smooth and transparent film, the size of the film is set according to the size of the corrugated board, and the film is matched with the size of the corrugated board;
s3: the paper tube of the base paper is arranged on the paper frame, the end part of the base paper is led out from the paper frame, the base paper led out from the paper tube is in a tight state, the base paper is prevented from being wrinkled in the moving process and influencing subsequent heating, the base paper is tensioned by a tensioning roller in the moving process, the outer side of the tensioning roller is tightly attached to the base paper, and the tensioning roller can rotate;
s4: the end part of the drawn base paper is attached to a paper guide roller, the base paper is guided to a heating roller for preheating, the outer side of the paper guide roller is tightly attached to the inner side of the base paper, the inner side of the base paper is tightly attached to the outer side of the heating roller, and the heating roller and the paper guide roller can rotate;
s5: conveying the raw paper passing through the heating roller to a single-side machine, pressing into a required corrugated paper core, wherein the corrugation peak of the corrugated paper core is positioned above the corrugated paper core, the opening of the corrugated paper core is positioned below the corrugated paper core, and conveying the prepared corrugated paper core to a corrugating machine;
s6: adding the adhesive braked in the step S1 into a corrugating machine, coating the adhesive on the ridges of the corrugated paper core by using the corrugating machine, adhering surface paper on the ridges of the corrugated paper core, and drying the surface paper and the adhesive on the corrugated paper core by using a dryer to prepare a semi-finished corrugated board;
s7: detecting the bonding strength and the edge pressure strength of the semi-finished corrugated boards, mutually bonding the qualified semi-finished corrugated boards, and drying the corrugated boards by using a dryer in S6 after the corrugated boards are bonded;
s8: the dried corrugated board is conveyed to a longitudinal and transverse shearing machine by a conveying belt for shearing, the power source of the conveying belt is a driving motor, a transmission is connected to an output shaft of the driving motor in a transmission manner, and the transmission is used for adjusting the moving speed of the conveying belt.
S9: cutting the dried semi-finished corrugated board into a finished corrugated board by using a cross shearing machine according to requirements, cleaning scraps generated in the cut finished corrugated board by using a suction fan, and adhering a waterproof layer prepared in S2 on the finished corrugated board;
s10: and drying the waterproof layer adhered to the finished corrugated board by using a dryer, and performing the next process on the dried finished corrugated board.
In the embodiment, in S1, after price and performance comparison, the starch adhesive adopted by the adhesive is not doped with pungent odor and harmful raw materials, the adhesive is environment-friendly, the starch adhesive comprises a mixture of water, raw starch, cooked starch, caustic soda and borax, the proportion of the mixture is 80% of the water, 20% of the starch (wherein the raw starch accounts for 85% and the cooked starch accounts for 15%), 2.4-2.8% of the caustic soda (the total amount of the starch) and 2.7-3.2% of the borax, after the preparation of the starch adhesive is completed, the starch adhesive is placed in a specific barrel for storage, the barrel is stirred at a stirring speed of 20rdm/min, the service performance of the starch adhesive is prevented from being reduced, in S1, the adhesion of the adhesive is detected by a tensile testing machine and a clean steel ball, the clean size is known in advance, the clean steel ball is reduced at a constant speed of 350mm/min at a speed of 250-, the clean steel ball stands still on the surface of the adhesive, the clean steel ball is quickly lifted upwards at the speed of 250-350mm/min by a tension pressure testing machine to obtain the adhesive force of the adhesive, the adhesive strength is obtained by using a formula of the adhesive force in unit area, in S2, the main materials of the synthetic lipid material are synthetic rubber and synthetic resin, other materials are auxiliary agents and filling materials, the part ratio of the synthetic rubber, the synthetic resin, the auxiliary agents and the filling materials is 34:35:23:8, the synthetic rubber, the synthetic resin, the auxiliary agents and the filling materials in equal proportion are added into a barrel and stirred at the rotating speed of 300rdm/min for 30-50min to prepare a mixed material, before the mixed material enters a film process stage, the mixed material is stirred at the speed of 20rdm/min to avoid the mixed material from being solidified, and then the waterproof film is prepared by using a film process, the permeability of water proof membrane is good, in S3, the specification of body paper is selected according to the demand, the holder of centre gripping fiber container has been set up on the paper frame, the fiber container can rotate on the holder, the last transmission of tensioning roller has still been connected the adjusting part, be used for adjusting the position of tensioning roller, and then make the body paper constantly be in the state of tightening, the power supply of adjusting part can be the cylinder of selecting the specification, in S4, preheat temperature on the warming mill is at 50-90 degrees centigrade, preheat time is 10-30S, the outside of warming mill and the contact time of body paper are between 3-5S, can be abundant heat the body paper, in S5, the model of single facer is SF-360, the specification of single facer is: temperature range: 160-180 ℃, gas source: 0.4-0.9 Mpa and steam pressure: 0.8-1.3 Mpa, controlling the pressurization of the single-sided machine between 20-40S at times, in S6, the specification of the corrugating machine can be consistent with that of the single-sided machine, two pieces of surface paper are selected, the two pieces of surface paper are respectively bonded with the top and the bottom of the corrugated paper core by using bonding agents, the type of the dryer can be selected according to actual requirements, the drying temperature of the dryer is 60-120 ℃, the drying time of the dryer is 20-25S, in S7, the bonding strength and the edge pressure strength of the semi-finished corrugated board are detected by using a compression tester with the type of DYSY-1, the bonding strength detection process is that the tested sample is firstly loaded into an accessory, then the accessory is placed at the center position of a lower pressing plate of the compressor, the compression tester with the type of DYSY-1 is started, the accessory loaded with the sample is pressed at the speed of 12.5mm/min until the corrugation peak and the surface paper are separated, recording the displayed maximum force F, and detecting the edge pressure strength by starting a compression tester with the model of DYSY-1, uniformly pressurizing a sample along the corrugation direction at the speed of 12-15mm/min, wherein the pressure on unit length becomes the edge pressure strength of a semi-finished corrugated paper sheet when the sample is crushed, the unit is N/m, in S8, a waterproof layer and a finished corrugated paper sheet are bonded by using an adhesive in S1, the model of a longitudinal and transverse shearing machine is F3015, the models of a transmission and a driving motor can be selected according to actual requirements, in S9, four suction fans are arranged in a matrix form, the four suction fans are arranged on the longitudinal and transverse shearing machine, scraps in the shearing process are sucked by the suction fans, in S10, the drying time of the waterproof layer and the finished corrugated paper sheet is 5-10S, and the drying temperature is 40-80 ℃.
The process comprises mixing and stirring water, raw starch, cooked starch paste, caustic soda and borax in proportion to obtain adhesive, testing adhesive viscosity with selected tension pressure tester, placing aside for use, preparing again when the adhesive is unqualified, mixing, stirring and extruding synthetic rubber, synthetic resin, auxiliary agent and filler to obtain waterproof layer, placing paper tube on paper frame, drawing out end of paper from paper frame, attaching the drawn out end of paper to paper guide roller, preheating the paper to heating roller, conveying the paper to single-side machine, pressing to obtain desired corrugated paper core, coating adhesive on the corrugated paper core, adhering face paper on the corrugated paper core, the method comprises the steps of manufacturing a semi-finished corrugated board, detecting the bonding strength of the semi-finished corrugated board by using a compression tester, detecting the edge pressure strength of the semi-finished corrugated board by using the compression tester after the bonding strength of the semi-finished corrugated board reaches the standard, otherwise, entering a rework processing workshop, and re-manufacturing base paper for use, separating the semi-finished corrugated board by using a longitudinal and transverse shearing machine after the edge pressure strength of the semi-finished corrugated board reaches the standard, so as to manufacture a finished corrugated board, or entering the rework processing workshop, and re-manufacturing the base paper for use, wherein the relationship between the bonding strength, the edge pressure and the pressure is P equal to F/M, P is the bonding strength and the edge pressure, F is the pressure, and M is the unit area.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The production process of the multilayer composite environment-friendly heavy corrugated board is characterized by comprising the following steps of:
s1: preparing an adhesive and detecting the adhesiveness of the adhesive, wherein the adhesive is divided into a water-soluble adhesive, a hot-melt adhesive, a solvent adhesive, an emulsion adhesive and a solvent-free liquid adhesive according to the use characteristics, and the adhesiveness of the adhesive is detected by rapidly pulling a clean steel ball;
s2: preparing a waterproof layer, wherein the waterproof layer is made of lipid waterproof materials, and because the natural lipid materials are not high in stability and some natural lipids are not environment-friendly, the synthetic lipid materials are used as main materials of the waterproof layer, the prepared waterproof layer is a layer of smooth and transparent film, the size of the film is set according to the size of the corrugated board, and the film is matched with the size of the corrugated board;
s3: the paper tube of the base paper is arranged on the paper frame, the end part of the base paper is led out from the paper frame, the base paper led out from the paper tube is in a tight state, the base paper is prevented from being wrinkled in the moving process and influencing subsequent heating, the base paper is tensioned by a tensioning roller in the moving process, the outer side of the tensioning roller is tightly attached to the base paper, and the tensioning roller can rotate;
s4: the end part of the drawn base paper is attached to a paper guide roller, the base paper is guided to a heating roller for preheating, the outer side of the paper guide roller is tightly attached to the inner side of the base paper, the inner side of the base paper is tightly attached to the outer side of the heating roller, and the heating roller and the paper guide roller can rotate;
s5: conveying the raw paper passing through the heating roller to a single-side machine, pressing into a required corrugated paper core, wherein the corrugation peak of the corrugated paper core is positioned above the corrugated paper core, the opening of the corrugated paper core is positioned below the corrugated paper core, and conveying the prepared corrugated paper core to a corrugating machine;
s6: adding the adhesive braked in the step S1 into a corrugating machine, coating the adhesive on the ridges of the corrugated paper core by using the corrugating machine, adhering surface paper on the ridges of the corrugated paper core, and drying the surface paper and the adhesive on the corrugated paper core by using a dryer to prepare a semi-finished corrugated board;
s7: detecting the bonding strength and the edge pressure strength of the semi-finished corrugated boards, mutually bonding the qualified semi-finished corrugated boards, and drying the corrugated boards by using a dryer in S6 after the corrugated boards are bonded;
s8: conveying the dried corrugated board to a longitudinal and transverse shearing machine by using a conveying belt for shearing, wherein the conveying belt is driven by a driving motor, an output shaft of the driving motor is also in transmission connection with a speed changer, and the speed of the conveying belt is adjusted by using the speed changer;
s9: cutting the dried semi-finished corrugated board into a finished corrugated board by using a cross shearing machine according to requirements, cleaning scraps generated in the cut finished corrugated board by using a suction fan, and adhering a waterproof layer prepared in S2 on the finished corrugated board;
s10: and drying the waterproof layer adhered to the finished corrugated board by using a dryer, and performing the next process on the dried finished corrugated board.
2. The process of claim 1, wherein in the step S1, the adhesive is prepared from starch adhesive without pungent odor and harmful materials, the starch adhesive is environment-friendly, the starch adhesive is composed of water, raw starch, cooked starch paste, caustic soda and borax in a ratio of 80% water, 20% starch (wherein the raw starch is 85% and the cooked starch is 15%), 2.4-2.8% caustic soda (based on the total amount of starch) and 2.7-3.2%, the starch adhesive is prepared and stored in a special barrel, and the barrel is stirred at a stirring speed of 20rdm/min to avoid the reduction of the usability of the starch adhesive.
3. The process for producing multilayer composite environment-friendly heavy corrugated cardboard as claimed in claim 1, wherein in S1, the adhesion of the adhesive is tested by a tensile testing machine and a clean steel ball, the size of the clean steel ball is known in advance, the clean steel ball descends at a constant speed of 350mm/min and stands still on the surface of the adhesive, the clean steel ball is lifted upwards by the tensile testing machine at a speed of 350mm/min and the adhesive force of the adhesive is obtained, and the adhesive strength is obtained by a formula of unit area where the adhesive force is equal to the adhesive force.
4. The process for producing multilayer composite environment-friendly heavy corrugated cardboard as claimed in claim 1, wherein in S2, the synthetic lipid material is mainly composed of synthetic rubber and synthetic resin, the other materials are auxiliary agents and filling materials, the part ratio of the synthetic rubber, the synthetic resin, the auxiliary agents and the filling materials is 34:35:23:8, the synthetic rubber, the synthetic resin, the auxiliary agents and the filling materials are added into a barrel in equal proportion, the mixture is stirred at a rotating speed of 300rdm/min for 30-50min to obtain a mixed material, the mixed material is stirred at a speed of 20rdm/min before entering the stage of the membrane process to avoid the solidification of the mixed material, and the membrane process is used to obtain a waterproof membrane with good permeability.
5. The process of claim 1, wherein in step S3, the specification of the base paper is selected according to the requirement, the paper holder is provided with a holding member for holding the paper tube, the paper tube can rotate on the holding member, the tension roller is further connected with an adjusting component in a transmission manner for adjusting the position of the tension roller, so that the base paper is constantly in a tensioned state, and the power source of the adjusting component can be a cylinder of the selected specification.
6. The process for producing a multi-layer composite environment-friendly heavy corrugated cardboard as claimed in claim 1, wherein in S4, the preheating temperature on the heating roller is 50-90 ℃, the preheating time is 10-30S, and the contact time between the outer side of the heating roller and the base paper is 3-5S, so that the base paper can be sufficiently heated.
7. The production process of the multilayer composite environment-friendly heavy corrugated cardboard as claimed in claim 1, wherein in the step S5, the type of the single facer is SF-360, and the specification of the single facer is: temperature range: 160-180 ℃, gas source: 0.4-0.9 Mpa and steam pressure: 0.8-1.3 Mpa, and the pressurization of the single noodle machine is controlled within 20-40 s.
8. The process for producing multi-layer composite heavy corrugated cardboard of claim 1, wherein in S6, the size of the corrugating machine is the same as that of the single-side machine, two face papers are selected, the two face papers are respectively bonded with the top and bottom of the corrugated cardboard core by adhesives, the type of the dryer can be selected according to actual requirements, the drying temperature of the dryer is 60-120 ℃, and the drying time of the dryer is 20-25S.
9. The process of claim 1, wherein in step S7, the bonding strength and the edge pressure strength of the semi-finished corrugated cardboard are measured by a compression tester of type DYSY-1, the bonding strength is measured by loading a sample to be tested into an accessory, placing the accessory at the center of a lower platen of the compression tester, starting the compression tester of type DYSY-1, pressing the accessory with the sample at a speed of 12.5mm/min until the corrugation peaks and the surface paper are separated, recording the maximum force F, the edge pressure strength is measured by starting the compression tester of type DYSY-1, pressing the sample uniformly in the corrugation direction at a speed of 12-15mm/min, and the pressure per unit length of the test piece becomes the edge pressure strength of the semi-finished corrugated cardboard when the test piece is crushed, the unit is N/m, the drying time after the corrugated boards are bonded is between 40 and 50s, and the drying temperature is between 50 and 110 ℃.
10. The process for producing multi-layer composite heavy corrugated cardboard of claim 1, wherein in S8, the waterproof layer and the finished corrugated cardboard are bonded by the adhesive in S1, the cross shearing machine is of type F3015, the transmission and the driving motor can be selected according to actual requirements, in S9, four suction fans are arranged in a matrix, four suction fans are installed on the cross shearing machine, debris generated during the shearing process can be sucked by the suction fans, in S10, the drying time of the waterproof layer and the finished corrugated cardboard is 5-10S, and the drying temperature is 40-80 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115816918A (en) * | 2022-12-27 | 2023-03-21 | 南京格润包装材料有限公司 | Heating and shaping production process for paper corner protector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115816918A (en) * | 2022-12-27 | 2023-03-21 | 南京格润包装材料有限公司 | Heating and shaping production process for paper corner protector |
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