With the greater exchange of global logistics, the requirements for the quality of the carton are higher. However, due to the restriction of raw materials such as starch and paper, the production of high-quality carton that meets the requirements of customers is a problem for most of the existing factories. many. In particular, when the export packaging is transported by sea for long distances, etc., the cartons are softened, degummed, and warped due to moisture absorption, resulting in returns, claims, and so on. For this reason, the production of high-quality water-reinforced carton has become an effective way and an inevitable trend for the factories to expand their business areas and increase their visibility. However, the traditional improper paste making methods and the poor quality of the paste and paste cannot meet the requirements for the bonding of the cardboard, making it impossible for the set to perform its high speed, high efficiency, and high quality performance.
Although various factories are trying their best to formulate recipes, processes, and raw materials for making paste, it is difficult to find a balance between cost and quality, efficiency, and operability. Import advanced equipment, good paper, it is impossible to import raw materials for making rubber. Although there are many reasons that affect the quality of the carton, the key factor is adhesion. All developed countries have used other additives to meet the new requirements of the carton.
The corrugated board produced by TD-515 additive can be immersed in water for 24 hours without opening the glue, and it is still glued after being dried, which is suitable for all types of imported and domestic units and various vehicle speeds. The operation is simple, no need to add personnel, equipment, directly add the starch paste and stir evenly to glue. Makes the cardboard smoother and firmer, and the carton is resistant to water, moisture, reinforcement, pressure, impact and other special and excellent performance.
Additives are a variety of polymer resin complexes, which ooze wrapper paper fibers at the instant of gelatinization to form a solidified phase network on the surface of the colloid in the drying tunnel. Enhance adhesion and increase paperboard yield. Excellent resistance to moisture immersion, enabling the carton to maintain a firm state for a long time, is also necessary for production of high-end color printing, export and wet, hot area carton manufacturing enterprises, under the role of additive network support, the carton compression resistance is outstanding. The use of additives for the production of cartons has a number of advantages under the same test requirements (except for the puncture strength).
1. Decrease the weight of paper by 10-20% under the same compressive conditions.
2.Compared with conventional pastes, it can save 4～8% starch and reduce the amount of caustic soda and borax 20～40% under the same adhesive strength.
3. Fast drying, increase the speed of the unit by 20 to 60%, the efficiency is higher, the cardboard is smooth and firm, and the printing yield is higher.
4. In the early stage, it is better to completely avoid hollowing and degumming in cardboard production, and the yield is 100%.
5. The additive makes the starch granules more suspensive and the sterilization in the additive makes the paste longer.
6. Reduce the amount of caustic soda, plus the water resistance of additives, make cartons moisture absorption is smaller, more suitable for long-term storage, refrigeration, shipping and other extreme environments.
Paste making process and operation method The paste making formula of the corrugated board production line basically refers to the “Stein Hall†method, and the paste making operation work is changed due to the different equipments in various countries. Here, the method adopted by most factories, First discuss the two-step method of paste production process and operation may encounter problems.
First, the carrier 1. Due to the use of additive system paste when the carrier's production only accounts for the total amount of 20 to 24%, there will be carrier tank stirrer blade can not hit the tank material, bring the material can not be fully mixed, affect the effect Therefore, the length of the shaft of the carrier stirrer should be lengthened so that the blades extend into the material, or the amount of the secondary paste can be added to the main body in divided portions. However, due to the large viscosity of the carrier paste, it is bound to cause inaccurate measurement.
2. The discharge valve of the carrier tank factory is about 1.5 to 2′′, which brings about discharging too fast. It is difficult for the carrier slurry to be fully mixed after being added to the main body. The solution method should be installed at the outlet of the discharge valve. "~ 1/2" variable beam section, so that the outlet diameter is less than 15 mm, the discharge time is controlled at 8 to 12 minutes or so.
3. According to the properties of the carrier slurry and the manufacturing process, if there is agglomeration and slow discharge, the power of the carrier stirrer motor should be increased, the shape and size of the stirrer blade should be changed, and the installation stability of the carrier tank should be checked. Sex etc.
Second, the main body 1. The main stirrer is preferably the use of speed motor, control speed between 400 to 1400 rpm.
2. When the carrier slurry is injected into the main body, the main stirrer should be in the stirring state with a rotation speed between 400 and 800.
3. After the carrier slurry is poured into the main body, stirring is continued for 15 to 20 minutes, and the two must be mixed thoroughly.
Third, the injection of additives 1. After the additive weighing, the container outlet can not be greater than 14 mm, the injection time is controlled between 5 to 10 minutes, the additive must be stirred when the additive is injected.
2. After the additives are injected into the main body, speed up the stirring speed, continue to stir for 10 to 20 minutes, if it is still not clear after 20 minutes, the jelly liquid will appear jelly-like, it should be regarded as the stirring intensity is too small, the main motor must be replaced, If the 4 kW motor is replaced with 5.5 kW, if it is still not ideal, the shape, angle, and area of ​​the blade of the agitator blade should be modified to ensure that the additive is fully mixed with the paste under the tumbling condition.
3. Be sure to use the viscometer to test the viscosity before applying on the machine.
Fourth, the other 1. Do not try to reach the viscosity requirements with a prolonged stirring time in the case of mixing powerless. (refers to normal production)
2. Add an additive injection plastic bucket with a hole of no more than 14 mm on the edge and allow it to self-inject.
3. The amount of water injected by the carrier and the main body must be accurate.
4. Use residual glue that has not been used up (more than 12 hours), should be re-pulled into the storage tank or paste tank to stir 5 to 10 minutes, it is best to add 40% of the fresh paste and mix well.
5. The use of additives The same factories should be based on their own business conditions and regional climate, winter, summer season, paper tightness, water absorption, moisture content, starch hydroxyl, sugar content changes, speed control glue, the proportion of material , such as the summer should increase the amount of starch, winter reduction ... ...
6. The paste tank, pipelines, storage tanks, pulp trays, rubber rollers, and the site should be highly valued. Dirty and poor environments are detrimental to the quality of the paste. Therefore, in order to ensure the cleanliness of the paste, it must be done before daily work. The man-hour cleaning paste tanks, corrugated bars, pulp disks, and yards, which do not allow molds and dirt to enter the paste and pipes, are very important for ensuring the efficient operation of the equipment and the quality of the cardboard.
Five, special tips! !
Additives and starch will produce a little pungent odor when cross-linking reaction occurs at high temperature. If the plant is low and narrow, attention should be paid to ventilation. You can install the ventilation and ventilation device above the exit or the roof of the tunnel.
In addition: when exporting to Europe and the surrounding areas, the amount of caustic soda used in the production process of cardboard is extremely small. In this case, the body paste must be heated by steaming. (60°C)
6. Test the water resistance of cardboard.
1. Take the finished cardboard cooled to Bao Wen from the production line, cut 1010 CM, immersed in water and wait until it is not moving. Observe for 2 hours and 24 hours respectively. No separation occurs between the paper and the paper and the corrugated medium. Of course, external force cannot be used. Tear, pull, take out the indoor vertical natural dry (can not be dried, dried), still glued as ever.
2. Take the finished board cooled to room temperature from the production line, cut 1020CM, immerse half of the 20CM in water and keep it static until it is observed for 2 hours, 4 hours, and no degumming occurred in the immersed or unimmersed water. You can. (Chen Lukang)
Although various factories are trying their best to formulate recipes, processes, and raw materials for making paste, it is difficult to find a balance between cost and quality, efficiency, and operability. Import advanced equipment, good paper, it is impossible to import raw materials for making rubber. Although there are many reasons that affect the quality of the carton, the key factor is adhesion. All developed countries have used other additives to meet the new requirements of the carton.
The corrugated board produced by TD-515 additive can be immersed in water for 24 hours without opening the glue, and it is still glued after being dried, which is suitable for all types of imported and domestic units and various vehicle speeds. The operation is simple, no need to add personnel, equipment, directly add the starch paste and stir evenly to glue. Makes the cardboard smoother and firmer, and the carton is resistant to water, moisture, reinforcement, pressure, impact and other special and excellent performance.
Additives are a variety of polymer resin complexes, which ooze wrapper paper fibers at the instant of gelatinization to form a solidified phase network on the surface of the colloid in the drying tunnel. Enhance adhesion and increase paperboard yield. Excellent resistance to moisture immersion, enabling the carton to maintain a firm state for a long time, is also necessary for production of high-end color printing, export and wet, hot area carton manufacturing enterprises, under the role of additive network support, the carton compression resistance is outstanding. The use of additives for the production of cartons has a number of advantages under the same test requirements (except for the puncture strength).
1. Decrease the weight of paper by 10-20% under the same compressive conditions.
2.Compared with conventional pastes, it can save 4～8% starch and reduce the amount of caustic soda and borax 20～40% under the same adhesive strength.
3. Fast drying, increase the speed of the unit by 20 to 60%, the efficiency is higher, the cardboard is smooth and firm, and the printing yield is higher.
4. In the early stage, it is better to completely avoid hollowing and degumming in cardboard production, and the yield is 100%.
5. The additive makes the starch granules more suspensive and the sterilization in the additive makes the paste longer.
6. Reduce the amount of caustic soda, plus the water resistance of additives, make cartons moisture absorption is smaller, more suitable for long-term storage, refrigeration, shipping and other extreme environments.
Paste making process and operation method The paste making formula of the corrugated board production line basically refers to the “Stein Hall†method, and the paste making operation work is changed due to the different equipments in various countries. Here, the method adopted by most factories, First discuss the two-step method of paste production process and operation may encounter problems.
First, the carrier 1. Due to the use of additive system paste when the carrier's production only accounts for the total amount of 20 to 24%, there will be carrier tank stirrer blade can not hit the tank material, bring the material can not be fully mixed, affect the effect Therefore, the length of the shaft of the carrier stirrer should be lengthened so that the blades extend into the material, or the amount of the secondary paste can be added to the main body in divided portions. However, due to the large viscosity of the carrier paste, it is bound to cause inaccurate measurement.
2. The discharge valve of the carrier tank factory is about 1.5 to 2′′, which brings about discharging too fast. It is difficult for the carrier slurry to be fully mixed after being added to the main body. The solution method should be installed at the outlet of the discharge valve. "~ 1/2" variable beam section, so that the outlet diameter is less than 15 mm, the discharge time is controlled at 8 to 12 minutes or so.
3. According to the properties of the carrier slurry and the manufacturing process, if there is agglomeration and slow discharge, the power of the carrier stirrer motor should be increased, the shape and size of the stirrer blade should be changed, and the installation stability of the carrier tank should be checked. Sex etc.
Second, the main body 1. The main stirrer is preferably the use of speed motor, control speed between 400 to 1400 rpm.
2. When the carrier slurry is injected into the main body, the main stirrer should be in the stirring state with a rotation speed between 400 and 800.
3. After the carrier slurry is poured into the main body, stirring is continued for 15 to 20 minutes, and the two must be mixed thoroughly.
Third, the injection of additives 1. After the additive weighing, the container outlet can not be greater than 14 mm, the injection time is controlled between 5 to 10 minutes, the additive must be stirred when the additive is injected.
2. After the additives are injected into the main body, speed up the stirring speed, continue to stir for 10 to 20 minutes, if it is still not clear after 20 minutes, the jelly liquid will appear jelly-like, it should be regarded as the stirring intensity is too small, the main motor must be replaced, If the 4 kW motor is replaced with 5.5 kW, if it is still not ideal, the shape, angle, and area of ​​the blade of the agitator blade should be modified to ensure that the additive is fully mixed with the paste under the tumbling condition.
3. Be sure to use the viscometer to test the viscosity before applying on the machine.
Fourth, the other 1. Do not try to reach the viscosity requirements with a prolonged stirring time in the case of mixing powerless. (refers to normal production)
2. Add an additive injection plastic bucket with a hole of no more than 14 mm on the edge and allow it to self-inject.
3. The amount of water injected by the carrier and the main body must be accurate.
4. Use residual glue that has not been used up (more than 12 hours), should be re-pulled into the storage tank or paste tank to stir 5 to 10 minutes, it is best to add 40% of the fresh paste and mix well.
5. The use of additives The same factories should be based on their own business conditions and regional climate, winter, summer season, paper tightness, water absorption, moisture content, starch hydroxyl, sugar content changes, speed control glue, the proportion of material , such as the summer should increase the amount of starch, winter reduction ... ...
6. The paste tank, pipelines, storage tanks, pulp trays, rubber rollers, and the site should be highly valued. Dirty and poor environments are detrimental to the quality of the paste. Therefore, in order to ensure the cleanliness of the paste, it must be done before daily work. The man-hour cleaning paste tanks, corrugated bars, pulp disks, and yards, which do not allow molds and dirt to enter the paste and pipes, are very important for ensuring the efficient operation of the equipment and the quality of the cardboard.
Five, special tips! !
Additives and starch will produce a little pungent odor when cross-linking reaction occurs at high temperature. If the plant is low and narrow, attention should be paid to ventilation. You can install the ventilation and ventilation device above the exit or the roof of the tunnel.
In addition: when exporting to Europe and the surrounding areas, the amount of caustic soda used in the production process of cardboard is extremely small. In this case, the body paste must be heated by steaming. (60°C)
6. Test the water resistance of cardboard.
1. Take the finished cardboard cooled to Bao Wen from the production line, cut 1010 CM, immersed in water and wait until it is not moving. Observe for 2 hours and 24 hours respectively. No separation occurs between the paper and the paper and the corrugated medium. Of course, external force cannot be used. Tear, pull, take out the indoor vertical natural dry (can not be dried, dried), still glued as ever.
2. Take the finished board cooled to room temperature from the production line, cut 1020CM, immerse half of the 20CM in water and keep it static until it is observed for 2 hours, 4 hours, and no degumming occurred in the immersed or unimmersed water. You can. (Chen Lukang)
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