News

The reason for the warping of cardboard: corrugated cardboard is too dry, the shrinkage ratio of the face paper and corrugated cardboard is not the same, and it is generally warped in the direction of the face paper. Solution: 1, the face paper warped, on the machine to the opposite direction grip 2, corrugated cardboard water is too low, cardboard is too dry, before use to corrugated cardboard water 3, the mounted cardboard is stacked positive and negative, and the number of each stack is less when receiving paper, and the second weight is heavy 4, face paper and corrugated cardboard with the same grain, face paper mixed corrugated cardboard grain cross mounted, pressing speed faster 5, choose high solid content of paper laminating machine starch glue, glue solid content is high, unit square on the glue amount is small.

With the "inner roll" of the packaging industry and the continuous improvement of customer requirements, Hui Quan Starch adhesives is committed to providing customers with better rubber powder products with its innovative research and development and high-quality production capacity. One of our company's star products - Ba Fang machine special high adhesive core rubber powder, with its good adhesion, fast drying, low cost characteristics, won a wide range of praise in the market.   1, good viscosity: strong and durable bonding effect   As a rubber powder specially created for Ba Fang machines, we know the importance of rubber powder in the production process. As a result, our highly adhesive core powder is carefully formulated to ensure excellent viscosity.   2, dry fast: improve work efficiency   In order to further improve production efficiency, the special rubber powder of the Eight Party machine has special characteristics of rapid drying. This means that after the rubber powder is applied, the drying process of the honeycomb paper core will be greatly shortened, thus speeding up the entire production line. Rapid drying not only greatly improves the production efficiency of the core strip, but also greatly reduces the delivery cycle.   3, low cost: significant economic benefits   This core rubber powder can reduce production cost as much as possible under the premise of ensuring product quality. Therefore, for Ba Fang machine special high adhesive core rubber powder, we achieve low-cost production by optimizing raw material procurement, which not only reduces the economic burden of honeycomb paper core factory, but also improves the market competitiveness of core.   For enterprises looking for efficient, economical and stable rubber powder products, our high adhesive core rubber powder is your rare choice. We look forward to cooperating with more customers to create brilliant future.

Henan Hui Quan Biotechnology Co., Ltd. focuses on the development and production of corrugated board production line additives, and is committed to improving and enhancing the quality and efficiency of corrugated board production through high-performance additives. Special additive for corrugated board production line is a three-in-one additive that integrates bonding, strengthening and stabilization. It has the characteristics of improving the stickiness of tile line adhesive, improving the stability of glue, improving the speed of corrugated board production line and reducing the amount of glue. 1. Improve viscosity Effectively improve the bonding properties and moisture-proof properties of the corrugated board adhesive, which can make the adhesive not easy to be emulsified after curing, so as to improve the edge pressing strength, flat pressing strength and breaking strength of the corrugated board 2. Reduce costs and increase efficiency The use of additives in the corrugated board production line can ensure the strength of the tile line while appropriately reducing the quantity of the base paper, and this optimization means lower manufacturing costs and higher economic benefits. In addition, the additives reduce the gelatinization temperature of the adhesive, increase the production speed, and also improve the smoothness of corrugated cardboard to meet the stringent requirements of consumers for quality. 3. Improve competitiveness The use of additives in the corrugated board production line can effectively reduce the amount of starch used under the premise of ensuring the bonding effect. This means not only the reduction of raw material costs, but also the protection of natural resources. By saving costs and resources, it strengthens its competitiveness in the market. In short, the use of additives can effectively improve the performance of corrugated cardboard and reduce production costs to a certain extent.

As we all know, cardboard composite starch glue is made of edible corn starch after oxidation and compounding, compared with white latex, foam alkali and other adhesives have the following advantages: 1, strong adhesion: high viscosity, strength reaches or exceeds the viscous strength of white latex 2, drying fast: cardboard composite 1-3 minutes after all sticky, 10 minutes to 1 hour dry 3, high hardness of the film: the film hardness is good, obviously harder than the white latex film, the adhesive cardboard hardness is good, high strength, good flatness 4, low cost: compared with other adhesives, the raw material price of cardboard composite starch glue is low, the production cost is relatively low, and the cost of rubber is reduced by 20% compared with similar products 5, good moisture resistance: the moisture resistance of the film is equivalent to that of white latex 6, green environmental protection: cardboard composite starch glue is made of edible corn starch, does not contain harmful substances, no pollution to the environment

There are several ways to check the adhesion of the paper laminator glue: 1. Feel test method: gently knead the pasted paper, if there is no foaming between the paper and the bottom plate, and the surface of the paper is flat, it indicates that the paste degree is enough. 2. Tilt test method: Tilt the pasted paper 45 degrees, if the paper does not fall off or slide, it indicates that the paste degree is enough. 3. Resin test method: Put a small piece of resin on the surface of the pasted paper, dip a small amount of water with your finger and rub it quickly, if the resin does not fall off, it indicates that the paste degree is enough. 4. Tear test method: The pasted paper is gradually torn away from the bottom plate, if the torn part of the paper is the fiber layer rather than the glue layer, it means that the paste degree is enough. It should be noted that the correct operation and the quality of the glue used will also affect the effect of the paste degree.

A paper tube glue heater is a device used to heat glue. It usually consists of a heating element and a paper tube. The working principle of the paper tube glue heater is to transfer heat energy to the paper tube through the heating element, so that the glue in the paper tube is heated to a certain temperature. The heating element can be an electric heating wire or a heating plate, which transmits heat energy to the paper tube through an electric current or other energy source. The use of a paper tube glue heater can improve the fluidity of the glue, making it easier to apply or spray. In some specific applications, heating glue can improve its bonding effect. Effectively solve the problems of poor fluidity of the paper tube glue in winter, slow initial adhesion, wrinkling and slipping of the paper tube Paper tube glue heaters are widely used in industrial production, especially in carton sealing, paper tube manufacturing and packaging industries. It can improve production efficiency and reduce the waste of glue. It should be noted that when using the paper tube glue heater, pay attention to safety to avoid burns or other accidents. At the same time, according to different glue types and requirements, choose the appropriate heating temperature and time.

Modified starch glue is a common adhesive, which is obtained by chemical or physical treatment of starch. Modified starch glue has good adhesion, adhesiveness and low cost, so it is widely used in paper products industry. In terms of research, the research of modified starch glue mainly focuses on the following aspects: 1. Modification methods: Different modification methods of modified starch glue are studied, including chemical modification and physical modification. Chemical modification methods include esterification, etherification, acid hydrolysis, etc. Physical modification methods include high temperature treatment, freezing treatment, etc. 2. Functionality: Study the different functions of modified starch glue, such as enhancing adhesion, improving water resistance, improving rheology, etc. Modified starch glue with different functions can be obtained by adjusting modification methods and conditions. 3. Structure: Study the structural characteristics of modified starch glue, including molecular structure, molecular weight distribution, crystal type, etc. By studying the structural characteristics, the properties and applications of modified starch glue can be deeply understood. In terms of application, modified starch glue is mainly used in the following fields: 1. Paper industry: modified starch glue can be used as an adhesive for paper to improve the strength of paper. 2. Packaging industry: Modified starch glue can be used as an adhesive for cartons to improve the adhesion of cartons. 3. Printing industry: modified starch glue can be used as an adhesive for printing ink to improve the adhesion of ink. 4. Construction industry: Modified starch glue can be used as tile adhesives, wall adhesives, etc., to improve the adhesion of adhesives. In short, modified starch glue has a wide range of research and application value, through the study of different modification methods and conditions, can be obtained with different functions of modified starch glue to meet the needs of different fields.

Carton packaging industry has a very special machine, that is, "manual gluing machine", with the development of technology, many carton factory laminating machine more advanced, from the initial manual gluing machine, to semi-automatic machines, and then to automatic machines, to the present high-speed laminating machine. Although crazy, many carton factories are still using manual gluing machine, although the speed of manual gluing machine is slow, but for zero single, loose single list, manual gluing machine is a best choice, so how to choose the starch glue of manual gluing machine? Many carton factories do not know how to choose starch glue. Master the following points, no longer have to worry about how to choose the right manual glue machine starch glue. 1, the glue drying speed can not be too fast 2, the glue concentration can not be too high 3, glue on the machine can not foam 4, the glue viscosity is better

Resin glue product specification:1.7 KG application scenarios:Laminating paper,fireworks cannon tube,pagoda tube product feature: a: the glue made of resin glue cost is low, 1 ton of starch with 40 bags of resin glue, can produce 7 tons of glue. After mixing glue, the average cost of glue per ton is 690 to 750 yuan/ton. Glue cost savings of 309. b:the amount of glue per unit square is relatively low. The viscosity of resin glue is relatively high, taking corrugated B tile and C tile as an example, the resin glue is 20-25 g/m, and the glue amount of traditional glue powder is 35-40 grams per unit. 40% less glue consumption c:the only drawback of resin glue is that the preparation process requires a reaction time of 1-2 hours, the traditional rubber powder is cold instant, directly used after adding water, no reaction time. Application Method: 1 part resin glue +1 bag of edible corn starch (25 kg) + 3 kg caustic soda + 2 kg borax + 150 kg water, after fermentation reaction to form glue (fermentation reaction 1-2 h) Details operation reference: resin glue making video and text formula Applicable machine type: High speed paper laminator ,Fully automatic laminating machine, Semi-automatic paper laminator, Hand glue machine Instant laminating machine starch glue product specification:25 KG application scenarios: Laminating paper, flat paste, paper tube, paper corner guard, cardboard bucket, industrial cardboard, honeycomb paper core, pet products, wood decoration board, gypsum board building materials product feature: a.high viscosity and quick drying: After over-pressing the belt, 5 minutes can be die-cut, completely brushed. After 3-5 minutes, the broken paper area can be as high as 80%-100%, there is obvious pulling resistance after tearing, and the paper is deeply broken. b. high cost performance: uniform glue, good film hardness, unit square glue as low as 22-25 g, the amount of powder 4 g. c. high purity: raw material effective ingredients up to 90%, glue without impurities, can be used 100%, no waste. d. good moisture resistance: the moisture is reduced to less than 12, and the pressure resistance can reach 320 KG. e.green environmental protection: the product is formaldehyde-free, long-term use is harmless to the human body, through the IS09001 quality system certification. Application Method: Direct cold water instant solution, stirring more than ten minutes can be. Details operation reference: Quick sol glue video and text formula Applicable machine type: High speed paper laminator . Fully automatic laminating machine, Semi-automatic paper laminator,Hand glue machine

After the paper and corrugated cardboard are mounted on the press, the glue line on the paper is not uniform, I believe that many laminating machine teachers have encountered this problem, then what is the cause of this problem, how can the glue line be uniform and the cardboard bond is still firm? The reasons for the uneven glue line of the cardboard made by the glue machine are as follows: 1, corrugated cardboard high and low 2. Uneven rubber roller 3, the glue is too thick, poor fluidity 4. There are impurities on the stick There are several ways to improve the uneven glue thread: 1. Choose corrugated cardboard with high flatness. The uneven level of corrugated cardboard will make the contact area of the cardboard surface uneven, thus affecting the uniform coating of glue. 2, the rubber roll in the use of paper into the machine, many times will cause the rubber roll deformation and bending - solution: need to remove the rubber roll to grind it or replace the new rubber roll 3, adjust the flow of glue, in the case of ensuring adhesion, the glue is thin, and the fluidity of glue is better. 4, do the daily cleaning of laminating machine and rubber roller

After corrugated carton lamination, the cardboard ends are warped and uneven, I believe many bosses and starters have encountered this problem, so what is the cause of this, and how can we make a good flatness of the cardboard. To improve warpage, the following methods are used: If the face paper is warped, bend the face paper in the opposite direction before putting it on the machine. 2. If the moisture level of the corrugated board is too low, the board is too dry. 3. Use a water stick to hit the corrugated board with water. 4. Adjust the glue to a thicker consistency and slow down the speed of the press tape. 5, wrong pattern laminating, corrugated paper and face paper pattern is crossed to laminating 6, laminated out of the cardboard front and back stacked, each stack as few as possible, the upper side of the weight pressure 7, laminated out of the cardboard to play a good chop, with the winding film fixed

See other people's boxes do not show glue marks do not show fluting, box compressive strength good hard, but the surface of their own boxes a strip of corrugated lines, but also floppy no point hardness, you follow the method I said with glue, to ensure that you do not only look good boxes can also be load-bearing! This is indeed closely related to the glue, so a good paper laminating glue will definitely allow you to get twice the result with half the effort! Below we analyze in detail, and teach you how to solve the problem: 1, first of all, if the box index requirements are high, it is highly recommended to use high purity low water ratio of high viscosity quick-drying glue 2, also according to the season or different customer needs to add appropriate glue enhancer 3, the amount of glue on the glue does not affect the bonding situation, the smaller the amount of glue the better 4, the glue solid content of low moisture is too large, the pressure caused by the glue line is too wide and too heavy through the paper 5, the face paper paper is too poor or grams too low, strong water absorption, will also cause the obvious flute, cardboard moisture back to soft 6. Don't hit the water stick when laminating the glue. 7, the face paper and corrugated board grain is cross-shaped laminating glue 8, framed cardboard if possible to use ventilation or emission equipment to shoot out the cardboard moisture, reduce the shrinkage of the face paper and corrugated cardboard after laminating (cardboard flute wrinkle are applicable).

The face paper and corrugated cardboard laminated, like this laminated cardboard, from the face paper to look at a fixed position with obvious offset (color darker than normal face paper color and will not dry), although this is caused by the glue, but most of the reasons related to machine adjustment. Possible causes of offset printing: 1.If it is really a glue problem, then the glue is too thick on the amount of glue is too large, appropriate thin point on the amount of glue smaller even point can be. 2, check the rubber roller may leak glue 3. The machine pressure is too heavy and the glue is squeezed into the corrugated groove, or the contact area between the glue roller and the cardboard is too dirty. 4. The garbage on the corrugated paper is stuck to the glue rollers. The glue rollers have a slanting cover, and the garbage is pressed on the top side, causing the There is another kin glue to be too large for the face paper. d of cardboard and cardboard framing, i.e., flat paste flat, the main problem is the glue: glue is too thick on the glue is too big to dump glue, appropriate to reduce the concentration of glue to reduce the amount of glue, glue tuned evenly.

Customers and friends of carton packaging often ask us, can the moisture test of your glued cardboard reach 8? I would like to say that it is impossible to count on the glue completely, because the paper itself contains moisture. See the figure below: The water content of the pit paper is 0. Figure 1 shows the test of the surface paper, and the water content is 7. Figure 2 shows that the pit paper is placed on the surface paper, and the water content is 5-6 before the glue is applied. The buyers of carton packaging customers will require the moisture to be controlled at 8-9. If the climate is relatively dry, if the glue amount is well controlled and the glue line is uniform, it can be controlled at 9-10. Our customers in Egypt and Africa generally have the moisture test index controlled at 9 moisture, which is no problem. However, if it is winter or in areas with more rain, there is a large amount of water in the air, which can not be achieved completely by glue. At this time, we need to rely on auxiliary equipment, such as exhaust fan and dryer. As shown below: Specific operation methods for reducing moisture: 1. Reduce the water content of rubber powder and increase the solid content 2. Use exhaust fan, dryer and other auxiliary equipment 3. The glue quantity is controlled for 30-40 seconds, except for high-speed machine 4. It is better not to have too serious high and low pits in the corrugated 5. You can slightly reduce the amount of caustic soda and increase the amount of borax under the original formula, 6. Finally, try to minimize the amount of glue on the premise of continuous glue

Properties of oxidized starch: Oxidized starch is a kind of modified starch which is obtained by the action of starch and oxidant in acid, alkali and neutral medium to oxidize starch. Through oxidation, carboxyl functional groups are introduced into starch molecules, and to some extent, the degree of polymerization of starch macromolecules is reduced due to degradation. Therefore, oxidized starch is endowed with some unique properties, which can be widely used in textile, paper making, packaging, food and fine chemical industries. Oxidized starch parameters: Appearance: white or yellowish powder Viscosity mpa. S: 30-32 (provided according to customer requirements) Water content: ≤ 14% Thermal stability: ≥ 85 PH value: 6~8 Sodium chloride: ≤ 1% Carboxyl content%: ≤ 0.01-0.30 Fineness (passing rate of 100 target standard sieves)%: ≥ 99 Differentiation of oxidized starch: 1. Starch has few impurities and high purity 2. Good transparency 3. Strong viscosity and good film-forming property 4. Volatility test: about 0.2 5. Introduction of advanced equipment, at least 10 tons of powder at a time, good stability 6. Lower gelatinization temperature and use cost Application of oxidized starch: 1. In the paper industry, it is used as surface sizing agent, coating adhesive, wet cloth addition and corrugated board adhesive. The oxidized starch is mainly used as sizing agent and adhesive in paper industry, which can significantly improve the printing performance and printing effect of paper. 2. In the packaging industry, it can be used as the adhesive for paper products, which can be prepared in cold water. It has the characteristics of fast drying speed, good stiffness of cardboard, good freeze-thaw resistance, no moisture absorption, no efflorescence, strong adhesion, etc. It can be applied to manual single machine, veneer machine, glue machine, pipe rolling machine, paper barrel machine, etc. 3.In the textile industry, oxidized starch is used as sizing agent. The oxidized starch is easy to gelatinize, has good fluidity, is easy to penetrate into the fiber, has uniform sizing, and reduces the occurrence of starch spots. It is suitable for sizing chemical fiber, polyester cotton, polyester rayon and other varieties of light yarn. Storage mode: It is recommended to store in a dry and ventilated environment to avoid damp and mildew.

The special adhesive for paper tube and paper barrel is a special adhesive for paper barrel to make various paper tubes, paper barrels, paper cans and related paper products. With the rapid development of China's economy, the demand for paper tubes and barrels in daily necessities, textiles, light industry, packaging, leather and other fields is growing. Such as toilet roll paper inner core tube, textile bobbin, cloth, paper, leather, plastic film and other roll packaging paper tubes. So how to choose the special adhesive for paper tube and paper barrel is very important. The following Huiquan adhesive small knitting will take you to identify it. 1. White latex White latex is a water-soluble adhesive, which is a thermoplastic adhesive prepared by polymerization of vinyl acetate monomer under the action of initiator. It is commonly called white latex or PVAC lotion for short, and its chemical name is polyvinyl acetate adhesive. characteristic: 1. White emulsion adhesive can be cured at room temperature with high bonding strength, and the bonding layer has good toughness and durability It can be used with water, and can not be diluted with cold water below 10 ℃. Use non staining. 2. Starch gum Starch glue is an adhesive made of raw materials, white or with yellowish powder, containing inorganic components, PH ≥ 7, easily soluble in water, and used with caustic soda and borax. characteristic: . Strong adhesion, low cost, fast drying, no delamination. . Formaldehyde free, green, water and moisture resistant. . The cost performance ratio is high, and the use cost is only 50% of that of white latex. Luohe Huiquan Adhesive Co., Ltd. is an industrial company engaged in research, development, production and operation of starch adhesive. Strong technical force, stable product quality, perfect marketing system, reliable reputation and excellent after-sales service. Huiquan starch adhesive has passed ISO9001 quality system certification Huiquan starch adhesive series products comply with the EU SGS executive standard

Non drying paper tube adhesive is a special adhesive for making various paper tubes, barrels, cans and related paper products. These paper tubes are generally mechanically rolled and bonded with kraft paper or other raw materials, and the adhesive used is called paper tube adhesive. With the rapid development of China's economy, the demand for paper tubes in daily necessities, textiles, light industry, packaging, leather and other fields is growing. Such as toilet roll paper inner core tube, textile bobbin, cloth, paper, leather, plastic film and other roll packaging paper tubes. It is very important for production to correctly use the non drying paper tube adhesive. The following is a summary of the use of Huiquan adhesives for reference only. 1. The base paper is fed into the upper glue machine and the paper tube machine in a straight line, and there is no bending paper route between them 2. The paper tube cots need to be cleaned regularly, and the upper cots scraper should be cleaned regularly every shift to avoid paper jams and foreign matters 3. The drying speed of glue can adjust the distance between glue machine and paper tube machine 4. The glue shall be taken from the back cover and the cover shall not be exposed to the air 5. Clean the glue sink regularly to keep it clean 6. The paper tube machine belt needs to be cleaned regularly in each shift 7. Grind or replace the paper cutting tube blade every shift 8. Maintain the uniformity and stability of the white oil backing paper 9. High quality and stable paper tube glue and base paper are prerequisites Precautions for using non drying paper tube adhesive: 1. Keep out of reach of children and away from direct sunlight. 2. Please pay attention to sealing after use (prevent the surface from forming film due to quick drying). 3. Do not mix with other adhesive products. 4. Shelf life: three months at 5-25 ℃. To achieve the above points, the adhesive can not only significantly improve the hardness and strength of paper tubes and paper corner guards, but also greatly reduce costs. Huiquan is a manufacturer of paper mounting adhesive powder, advocating the concept of high viscosity. The adhesive produced by Huiquan does not need heating and is easy to operate. It can be used according to our formula.

At present, modern post press technology is gradually infiltrating into the specific production process, ranging from the design of technological process, the manufacture of advanced equipment, to the matching of adhesives and materials, etc., are gradually improving the production and manufacturing process, making efforts for a new round of high-speed and efficient productivity improvement. As a widely used adhesive product in the packaging industry, enlin adhesive has developed and produced a special adhesive powder suitable for the use of high-speed paper mounting machine. Through the verification of many enterprises, it can meet most of the requirements of high-speed paper mounting machine. On the basis of the same configuration, it is superior to other brand adhesive technical indicators. The special rubber powder for enlin paper mounting machine is suitable for high-speed paper mounting machine with machine speed of 10000 / h-12000 / h. The compression resistance of paperboard can reach 320kg, the moisture content can be reduced to less than 9, and the unit glue amount can reach 22G / m2. It can be die cut within 1 hour after the pressing belt is released. 100% qualified rate of finished products (in the actual production process, due to the different configuration of facing paper and tile paper, the actual measured values are slightly different Different). This product is very suitable for the carton compression, drying speed requirements higher products, can greatly improve production efficiency, thus improving the unit time capacity, creating more profits. As a professional starch adhesive manufacturer in China, enlin adhesive develops and produces a new type of high molecular polymer resin rubber powder for users with machine speed less than 10000 / h, fast drying speed and good cardboard stiffness. The product is fermented at normal temperature, and the rubber yield is twice of that of the conventional quick mix rubber. It can be dried quickly, and can be roughened when it is pressed out. It can be die cut in one hour, and the unit glue volume can reach 23g/ M2, the cost can be reduced to 2 cents / m2, which can greatly reduce the production cost; the basic raw materials of polymer resin rubber powder can be purchased locally, and the national purchase price of basic raw materials is almost the same. The resin rubber powder is delivered directly from the factory, with small volume, which greatly saves the logistics cost and improves the production profit for the remote delivery users. Enlin brand starch adhesive series products mainly include: veneer machine, corrugated board production line, paper tube, kraft paper barrel and other special rubber powder, special environmental protection glue for gluing box and sealing, all-round application in the gluing of paper products, with excellent quality and high cost performance. The product conforms to GB / T19001-2008 / ISO9001:2008 management standard, and has passed the EU ROHS executive standard certification. It is a trustworthy and reliable adhesive brand for paper products. Sixteen years focus on adhesive R & D and production, 5000 customers paper products adhesive solutions, please call us! Tel.: + 86 15713888869 Zhengzhou enlin import and export trade Co., Ltd

If the prepared starch adhesive can be used in production, it should be tested before use, only in this way can we ensure to produce carton products with good bonding quality. One. Sensory examination By observing sound, foam, color, silk to identify the quality of adhesives. 1. Listen: After the adhesive is prepared, when the reaction mixing just stops, the liquid of the adhesive will swirl and crash on the mixing paddle, making a sound like flowing water, indicating good flow performance. 2. look at bubbles: When the binder is stirred, a small amount of white foam will appear. When the mixture is stopped, it will be observed with glass glue. The small bubbles will rise and burst, and the foam will disappear gradually. 3. Color: The adhesive shall be light yellow brown, oily, clear and clear without turbidity. 4. Wire drawing: Dip a small amount of adhesive with thumb and index finger, separate the two fingers after rubbing and contacting each other, and after repeated times, the drawing should be more than 15-20 mm. Two. Viscosity test Through sensory testing, we can judge the quality of adhesive at the beginning, but we should also measure its viscosity and initial viscosity, control and adjust the viscosity of adhesive, which is conducive to the infiltration, penetration and diffusion of adhesive molecules on the paper surface. So that it has excellent adhesion performance, improve the initial viscosity and bonding strength. A certain volume of the adhesive is flowed out of the small hole in the flow cup of the viscometer, and the required time is used to express the viscosity. Test method: Take the four cups of coating as the testing instrument, and measure more than three times according to the operating procedures. Take the arithmetic mean value of two times close to the viscosity value as the measurement result, and the viscosity index shall be 30-45 seconds Three. Alkali measurement of initial viscosity The initial viscosity refers to the degree to which the adhesive and the board are bonded in a short period of time Test method: Cut 1ocm × 10cm Ten pieces of box board paper are divided into five groups. One piece of each group is evenly covered with adhesive, and then the other piece is aligned with each other, and then a little pressure is applied. The paper is placed at room temperature, and the starting time is recorded. After 10 minutes, the paper pieces are peeled off in sequence according to the order of adhesion. The paper breaking rate is calculated by the arithmetic average value of five groups according to the percentage of the broken area of paper fiber and the area of the paper piece. The higher the paper breaking rate, the higher the initial viscosity. The stronger the bond strength of corrugated board is.

Before the large-scale production of corrugated board, the production personnel will test the adhesive. The main test method is to tear the corrugated board and the face paper after the board passes the bonding tape to see if there is any "galling" phenomenon. If all "roughening" can be safely put into production. What about partial or no galling? This paper will analyze the causes and solutions of these phenomena. What is card board galling? After the corrugated board and the face paper enter the laminating belt together, the two pieces are torn, and the paper fiber is attached to the surface of the face paper and the corrugated board, which is called the galling phenomenon. From the above figure, we can see that some of the surface paper has paper fiber attached to the surface, and there is galling phenomenon. Some of the surface paper does not have paper fiber attached to the surface, that is, there is no galling phenomenon. This is the common phenomenon of partial galling and partial non galling. Cardboard part of the roughening, no roughening what harm? Only when the paper fiber is damaged by glue, can the phenomenon of galling occur. And part of the roughening, no roughening in the end will lead to corrugated board part of the glue or all of the glue such a serious harm. The production and solution of the part of the board roughening phenomenon: 1. The pressing belt speed is too fast. (slow down the pressing belt speed) 2. Too much glue. (reduce the amount of glue applied.) 3. Adhesive quality problems. (poor viscosity, slow drying speed, and stable quality adhesive) The production and solution of paperboard without galling phenomenon: 1. The machine pressure is too light. (adjust machine pressure) 2. Causes of corrugation. The corrugation is crushed before it enters the press roll. (adjust the corrugated pressure) 3. Adhesive quality problems. (choose adhesive with good viscosity and fast drying speed.)