阅读说明：本技术 一种瓦楞纸箱预印卷筒面纸贴合生产工艺 (Laminating production process of preprinted roll paper of corrugated carton ) 是由 李昌斌 阮光胜 江伟 王道风 于 2021-07-16 设计创作，主要内容包括：本发明属于属于纸箱粘接加工技术领域,尤其是一种瓦楞纸箱预印卷筒面纸贴合生产工艺,可获得更为优秀的纸箱印刷展示效果,在平滑的纸张表面进行印刷,然后印刷在凹凸不平的纸板表面上,有更大的优越性,可以进行层次更加丰富的精美印刷,其贴合工艺更加稳定可靠,卷筒面纸直接粘结,可以使瓦楞纸箱获得更高的强度,有利于其适应对强度有较高要求的场合,避免瓦楞变形和减弱纸板强度等问题适合于印刷大型和重型瓦楞纸箱。生产效率高,便于生产管理,可以进行高速印刷大大提高生产效率,生产成本降低,可以促进水墨平衡不定且印刷色相一致。(The invention belongs to the technical field of carton bonding processing, and particularly relates to a laminating production process for preprinted roll surface paper of a corrugated carton, which can obtain more excellent carton printing and displaying effects, can print on the surface of smooth paper and then print on the surface of an uneven paperboard, has greater superiority, can perform exquisite printing with richer layers, is more stable and reliable in laminating process, can ensure that the roll surface paper is directly bonded, can ensure that the corrugated carton obtains higher strength, is favorable for adapting to occasions with higher requirements on strength, avoids the problems of corrugated deformation, weakening of paperboard strength and the like, and is suitable for printing large and heavy corrugated cartons. The production efficiency is high, the production management is convenient, the high-speed printing can be carried out, the production efficiency is greatly improved, the production cost is reduced, the ink balance is not definite, and the printing hue is consistent.)

1. The laminating production process of the preprinted roll surface paper of the corrugated carton is characterized by comprising the following steps of: firstly, gluing by a single-sided corrugating machine to obtain a single-sided corrugated board; secondly, the single-sided corrugated board penetrates into a paper guide roll and is sent into a triple preheater, and paper holders of two layers of single-sided corrugated boards are aligned up and down, so that the single-sided corrugated boards are sent into a double-sided machine after all the single-sided corrugated boards pass through the overpass paper holder; thirdly, opening steam valves of the preheaters by the double-faced machine, then putting the upper and lower glue discs into glue solution, putting the surface paper on a shaftless support to be smooth and face downwards, conveying the surface paper and the single-faced paper board from the triple preheater, manually guiding the surface paper and the single-faced paper board to pass through a preheating roller and a glue spreading roller, tensioning a conveying belt, slowly rotating a speed regulating button of the double-faced machine, aligning the single-faced paper board and the surface paper and sending the single-faced paper board and the surface paper board into a dryer, putting down a ballast roller, and starting the glue spreading roller to spread glue and attach; fourthly, longitudinally and transversely cutting; fifthly, stacking paper boards, wherein the front and back 10 paper boards form one turn; the fifth step: die cutting of the paperboard: and (3) processing on a machine and die cutting: after the plate is corrected and the pressure of the die-cutting machine is well adjusted, a die-cutting adhesive tape is placed, and an indentation bottom die is formed on a bottom die steel plate; and sixthly, glue penetration and glue overflow are carried out, the inner side and the outer side are not adhered, and the box is adhered and packaged.

2. The laminating production process of the preprinted roll paper of the corrugated case as claimed in claim 1, wherein the single-sided corrugating machine is glued such that corrugated raw paper is correctly installed on a model shaftless support, the smooth surface faces upwards, steam is introduced, a main motor is started, the corrugated paper starts to be conveyed when the steam pressure rises to 7-8 kPa after rapid operation, a glue valve is released, a speed regulating button of the main motor is rotated at a constant speed, a pressure key is pressed, the pressure is 200-300N/cm, and the corrugated paper board is sent out and sent to an overbridge.

3. The process for producing corrugated carton preprinted roll paper lamination according to claim 1, wherein if the distance between the die-cutting knives is 6-12 mm, the die-cutting adhesive tape is selected to be one of the die-cutting adhesive tapes with the hardnesses of HS600, HS250 and HS350 or the arch die-cutting adhesive tape with the hardness of HS 700.

4. The laminating production process of the preprinted roll paper of the corrugated case as claimed in claim 1, wherein the distance between the die-cutting adhesive tape and the two sides of the die-cutting blade body is 1-1.2 mm.

Technical Field

The invention belongs to the technical field of carton bonding processing, and particularly relates to a laminating production process of pre-printed roll paper of a corrugated carton.

Background

The corrugated case has the pure product protection function, and gradually improves the sales function of attracting customers and stimulating purchase, the proportion of the color corrugated case in the paper case is rapidly increased, the color corrugated case becomes a new sales promotion means, and the development space of the color corrugated case is large. At present, for the demand of solving corrugated box function transition, in the aspect of printing processing, the processing mode of preprinting has appeared. As the name implies, preprinting is to print the required design in advance before the corrugated board is made, and specifically, the preprinting process is to print the facial tissues in a roll-to-roll manner before the corrugated board is produced. For example, chinese patent CN102173162A discloses a method and a production line for producing pre-printed tissue corrugated cardboard, and as the name suggests, the pre-printing is to print the required related design patterns in advance before the corrugated cardboard is made. For example, chinese patent CN1586882 discloses a corrugated board making device with a digital ink-jet type preprinting device, and the preprinting technology has become an important development trend of corrugated box printing, and especially, high-grade exquisite cartons, large and heavy cartons are more suitable for preprinting. The color printed surface paper is attached to the corrugated board by the corrugated board machine to form the corrugated board, so that the subsequent printing process is naturally omitted, and a process of pressurizing (easily damaging) the corrugated board is omitted, so that the process is called as preprinting, and the fundamental difference between preprinting and traditional carton printing is also the problem. Since the preprinting is not carried out after the paperboard is formed, the deformation of the corrugation and the weakening of the strength of the paperboard can be avoided. In the post-printing process using the print fluting machine for corrugated cardboard, each color may cause more or less deformation of the corrugated cardboard. However, there is a technology dedicated to the lamination of the surface paper of the pre-printed roll of the corrugated carton in the market at present, so that a technology for laminating the surface paper of the pre-printed roll of the corrugated carton needs to be developed to meet the existing technical requirements and wide market demands.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a corrugated carton preprinting roll paper laminating production process.

The invention is realized by the following technical scheme:

firstly, correctly mounting corrugated raw paper on a model shaftless support according to the paper specification specified by a production notice on a single-sided corrugating machine, introducing steam when the smooth surface is upward, starting a main motor, rapidly running until the steam pressure is increased to 7-8 kPa, conveying the paper, and releasing a glue valve, wherein the glue applying amount is 4-8 g/m²Rotating a speed regulating button of a main motor at a constant speed, pressing a pressure key, and making a top tile paperboard and sending the top tile paperboard to an overpass under the pressure of 200-300N/cm; secondly, accurately penetrating the single-sided corrugated boards input by the single machine into each paper guide roller in sequence, feeding the single-sided corrugated boards into a preheater, aligning paper holders of two layers of single-sided corrugated boards up and down, adjusting the paper holders to be slightly wider than the single boards, determining displacement according to longitudinal cutting specifications, clamping side baffles after normal production, pressing down an air suction button, keeping in contact with the double-sided machine at any time, accurately and timely correcting the inclined trend of the single-sided corrugated boards until the single-sided corrugated boards are in an optimal state, manually guiding the single-sided corrugated boards after all the single-sided corrugated boards pass through the overpass paper holders, and avoiding the single-sided corrugated boards from being aligned with the facial tissues after entering a dryer; and thirdly, opening steam valves of the preheaters by the double-faced machine, then putting the upper and lower rubber discs into the rubber solution, putting down the ballast roll, and adjusting the gap between the upper and lower rubber discs and the rubber roll to be slightly smaller than the thickness of the single-faced paperboard to pass through, wherein the gaps between the upper and lower rubber discs and the rubber roll are equal. The shaftless support is provided with required surface paper, the smooth surface of the surface paper faces downwards, and the gluing amount is 4-8 g/m²After the single-sided paperboard and the facial tissue are conveyed from the triple preheater, the single-sided paperboard and the facial tissue are manually guided to pass through the preheating roller and the glue spreading roller, then the conveying belt is tensioned, the speed regulating button of the double-sided machine is slowly rotated, the single-sided paperboard and the facial tissue are aligned and are conveyed into the dryer, the ballast roller is put down, the glue spreading roller is started, the ballast roller is lifted up after production is finished, the glue spreading roller is stopped, the glue valve is closed, glue solution in the glue tray is discharged, then the heat source is turned off, drying is stopped, the glue tray, the glue spreading roller and sundries on the conveying belt are cleaned after the conveying belt is lifted up, and cleanness is kept; fourthly, longitudinal and transverse cutting: the circle-pressing circle-die-cutting machine is composed of die-cutting roller, anvil roller, paper-feeding roller, etcAnd (4) partially forming. The arc-shaped template is provided with a cutter and a pressing line, the cutter part can cut the corrugated board completely, and the pressing line can only complete indentation. The die plate is mounted on a die cutting roll. During operation, the relative speed of the die cutting roller and the corrugated board in feeding is controlled, so that the line pressing and cutting operation on a preset position can be accurately finished on the corrugated board, a box blank is manufactured, a paper head is timely pulled, the trimming width is accurately and effectively adjusted, the situation that the paper board has no burrs and materials and is exposed is ensured, and after production is finished, a site is timely cleaned and equipment is kept clean; fifthly, stacking paper boards: before starting the paperboard stacking machine, carefully checking whether a circuit air valve is normal, whether transmission is off-tracking, whether a lifting device and a transverse device are sensitive and oiling each rotating part; and starting up after exception is eliminated. Meanwhile, a stacking tray is prepared in advance, after the machine is started, the stacking of the paperboards is neat, the paperboards cannot be collided and inclined, and the front and the back of 10 paperboards form one turn; the fifth step: die cutting of the paperboard: and (3) processing on a machine and die cutting: the die cutting adhesive tape needs to be of different hardness according to different bonding positions.

Further, if the distance between the die cutting knives is 6-12 mm, one of die cutting adhesive tapes with the hardness of HS600, HS250 and HS350 or arch-shaped die cutting adhesive tapes with the hardness of HS700 is selected as the die cutting adhesive tape

When the die-cutting adhesive tape is used for die cutting, the die-cutting adhesive tape can be compressed and deformed, if the die-cutting adhesive tape is too close to a knife line, the die-cutting adhesive tape can only expand in the opposite direction of the knife body after being pressed, so that the fault of paper pulling to two sides is caused, and when the die-cutting knife does not cut the paper, the paper is pulled apart by the die-cutting adhesive tape, so that paper dust and fuzz can be generated, and the die-cutting effect is influenced; if the distance is too far away from the knife line, the effect of preventing the paperboard from sticking to the knife cannot be achieved.

Further, the die cutting adhesive tape should leave the distance of 1-2 mm on both sides of the die cutting blade body, the die cutting adhesive tape should be 1.2mm higher than the blade point, and make appropriate adjustment according to different hardness.

Sixthly, adhering the box: when the box is adhered, the surface of a product is free from friction, scratches and dirt, the adhesion quality is frequently checked in the process, and the phenomenon that the inside and the outside of glue cannot penetrate and overflow is prevented from adhesion is ensured.

The invention has the beneficial effects that:

the corrugated raw paper is first regulated and ironed with preheater and moistener to make the raw paper meet the technological requirement, and then fed between upper and lower corrugated rollers at 160 deg.c to be pressed into corrugated shape under the pressure of the upper corrugated roller. Then coating adhesive on the corrugated top by a glue coating roller, leading the corrugated paper into a corrugated paper web by a crescent paper guide plate beside a lower corrugated roller, attaching the corrugated paper web on the teeth of the lower corrugated roller, finally pasting the corrugated paper web and preheated surface paper into a single-sided corrugated board under the action of a pressure roller, enabling the adhesive to permeate into the gaps between the surface paper and the surface of core paper to cause permeation and adhesion, forming surface adhesion by forming bonding between adhesives on the surface of the adhesive, forming cohesive bonding by bonding between molecules of the adhesive, processing the single-sided corrugated board coated with the adhesive and roll surface paper into a three-layer or multi-layer corrugated board by a double-sided machine at a certain temperature and pressure, at the section, finishing the pasting-bonding-primary curing process by the adhesive, bonding the single-sided corrugated board and the surface paper at a certain temperature and pressure, evaporating excessive water to form a straight and hard paper board, the paperboard is gradually cooled, and the moisture is fully evaporated, so that the strength of the paperboard is increased, and the deformation is reduced. The preprinting of the corrugated case is the meaning of preprinting as the name implies, and the content such as pictures and texts to be printed is printed on the surface paper of the roll of the corrugated case, and then the corrugated case is made by a large line and then is formed by die cutting. The corrugated peak of preprinting corrugated board can not be pressed by the second paper mounting of the paperboard printing and offset printing of the post printing in advance, so that the physical performance can be improved under the same material preparation, the product quality of the transportation process can be better ensured, the novel water-based ink is adopted, the novel water-based ink is non-toxic and pollution-free, the requirements of green environmental protection are completely met, the discharge of VOCs can be greatly reduced, the preprinting speed is high, the novel water-based ink is suitable for products with large order quantity, and the printing speed is high.

Compared with the prior art, the invention has the following advantages:

with the various case of traditional tile offset printing, it compares to mount into corrugated container board with the colored face and see the hole cardboard through mounting the paper machine, can obtain more outstanding carton printing bandwagon effect, thereby make because the preprinting is printed on level and smooth paper surface, then print on unevenness's cardboard surface, there is bigger superiority, can carry out the more abundant exquisite printing of level, its printing quality is also more reliable and more stable, can make corrugated container box obtain higher intensity, be favorable to its adaptation to avoid the flute to warp and weaken problems such as cardboard intensity to the occasion that has higher requirement to intensity, high production efficiency, the production management of being convenient for, can carry out high-speed printing and improve production efficiency greatly, and production cost reduces, can promote the balanced indefinite and printing hue of ink.

Detailed Description

The invention is illustrated by the following specific examples, which are not intended to be limiting.

Example 1

Firstly, in a Beijing mountain single-side corrugating machine DWG-2500, correctly mounting corrugated base paper on a YWZJ-D-2500 shaftless support according to the water content of the corrugated base paper being 8%, leading steam into the support with a smooth surface upward, starting a main motor, rapidly running until the steam pressure rises to 8kPa, leading the temperature of a tile roller to reach 165 ℃, conveying paper, releasing a glue valve, wherein the glue adding amount is 8g/m²Rotating the speed regulating button of the main motor at a constant speed, pressing a pressure key, and making a top tile paperboard and sending the top tile paperboard to an overpass under the pressure of 300N/cm; secondly, accurately penetrating the single-sided corrugated boards input by the single machine into each paper guide roller in sequence, feeding the single-sided corrugated boards into a Kyoshan YRA1000-2500 triple preheater, vertically aligning paper holders of two layers of single-sided corrugated boards, adjusting the paper holders to be slightly wider than the single-sided corrugated boards, determining the displacement according to the longitudinal cutting specification, clamping side baffles after normal production, pressing down an air suction button, keeping contact with the double-sided machine at any time, accurately and timely correcting the inclined trend of the single-sided corrugated boards until the optimal state is achieved, wherein the paper edge misalignment rate cannot exceed 5m from start-up to normal, and manually aligning the single-sided corrugated boards after all the single-sided corrugated boards pass through a bridge paper holder after the single-sided corrugated machine finishes a production task and stops, so as to avoid the misalignment with face paper after the single-sided corrugated boards enter a dryer; and thirdly, opening steam valves of the preheaters by the double-faced machine, then putting the upper and lower glue discs into glue solution, putting down the ballast roll to adjust the gap between the upper and lower glue discs and the glue spreader to be 0.2mm, enabling the gaps of the two ends to be equal, installing required surface paper on the YuwZJ-D-2500 shaftless support in Jingshan, enabling the surface paper to be smooth and clean downwards, observing whether the glue spreading amount is proper or not after starting up, and adjusting the glue spreading amount improperly. Triple preheating of single-sided paperboard and tissueAfter the device is conveyed, the paper passes through a preheating roller and a glue spreader in a manual guiding mode, then a transmission belt is tensioned, a speed regulating button of a double-sided machine is slowly rotated, single-sided paper boards and surface paper are aligned and sent into a dryer, a ballast roller is put down, the glue spreader is started, and the gluing amount is 50g/m²Wherein the speed of the dryer is 250mm/min, the first group of hot plates is 40 ℃, the second group of hot plates is 50 ℃, the third group of hot plates is 60 ℃, the fourth group of hot plates is 50 ℃, and the opening of the air cushion valve is 35 percent, the ballast roller is lifted up after production, the glue spreader is stopped, the glue valve is closed and the glue solution in the glue tray is discharged, then the heat source is turned off, drying is stopped, and the glue tray, the glue spreader and the sundries on the conveying belt are cleaned after the conveying belt is lifted up; fourthly, longitudinally and transversely cutting, effectively adjusting the width of the cut edge, ensuring that the paperboard has no phenomena of burr, material shortage and tile exposure, and cleaning in time after the longitudinally and transversely cutting is finished; fifthly, stacking paper boards: the paperboard stacking machine is used for stacking and placing the paperboards on the tray, the paperboard stacking needs to be tidy without collision and deflection, and the front and back 10 pieces form one turn; the fifth step: die cutting of the paperboard: and (3) processing on a machine and die cutting: making an indentation plate, adjusting the pressure of a machine table and a correction template, correcting the plate and adjusting the pressure of a die-cutting machine, placing die-cutting adhesive tapes, forming an indentation bottom die on a bottom die steel plate, fixing the made die-cutting plate on the die-cutting machine table, wherein the distance between die-cutting cutters is 8mm, and selecting the die-cutting adhesive tapes with the hardness of HS 250; the die-cutting adhesive tape is required to be separated from the two sides of the die-cutting knife body by 1.2mm, the die-cutting speed is 4500 sheets/h, the die-cutting pressure is 125t, and the thickness of the corrugated board is 3 mm; sixthly, adhering the box: the surface of a product is ensured to have no friction, scratches and dirt when the product is adhered to a box, if the machine is adhered to the box, a machine table is cleaned before starting, the gluing amount and the width of the box inlet are adjusted, a first product is taken out of the machine and is checked according to relevant standard terms, normal production can be put into after the product is qualified, the adhesion quality is frequently checked in the process, and the phenomenon that the inside and the outside of the glue cannot penetrate and overflow is not adhered is ensured. The adhesive is polyvinyl alcohol PVA088-20 mass percent 8%. The corrugated base paper is kraft liner board paper, and has ring crush index of 11.0 N.m/g and basis weight of 280g/m²And the ring crush strength of the tea board paper: 136N/cm and 316g/m tea board paper²The A type cold corrugated paper box has the size of 0.5m multiplied by 0.4m multiplied by 0.2m, 9 layers of single load-bearing 15kg piles, the relative humidity of the environment of 10 days is 90 percent, the compression strength of the paper box is 5880N, the ring crush strength of the paper board is 1097N/cm, and the bursting strength is 16.7kgf/m²The puncture strength was 82kg-cm, the surface paper had no cracks after opening and closing 180 degrees for 5 times, the moisture content was 8%, and the adhesive strength was 6.5 kgf/lenz.10 cm.

Example 2

Firstly, in a Beijing mountain single-side corrugating machine DWG-2500, correctly mounting corrugated base paper on a YWZJ-D-2500 shaftless support according to the water content of the corrugated base paper being 8%, leading steam into the support with a smooth surface upward, starting a main motor, rapidly running until the steam pressure rises to 8kPa, leading the temperature of a tile roller to reach 165 ℃, conveying paper, releasing a glue valve, wherein the glue adding amount is 8g/m²Rotating the speed regulating button of the main motor at a constant speed, pressing a pressure key, and making a top tile paperboard and sending the top tile paperboard to an overpass under the pressure of 300N/cm; secondly, accurately penetrating the single-sided corrugated boards input by the single machine into each paper guide roller in sequence, feeding the single-sided corrugated boards into a Kyoshan YRA1000-2500 triple preheater, vertically aligning paper holders of two layers of single-sided corrugated boards, adjusting the paper holders to be slightly wider than the single-sided corrugated boards, determining the displacement according to the longitudinal cutting specification, clamping side baffles after normal production, pressing down an air suction button, keeping contact with the double-sided machine at any time, accurately and timely correcting the inclined trend of the single-sided corrugated boards until the optimal state is achieved, wherein the paper edge misalignment rate cannot exceed 5m from start-up to normal, and manually aligning the single-sided corrugated boards after all the single-sided corrugated boards pass through a bridge paper holder after the single-sided corrugated machine finishes a production task and stops, so as to avoid the misalignment with face paper after the single-sided corrugated boards enter a dryer; and thirdly, opening steam valves of the preheaters by the double-faced machine, then putting the upper and lower glue discs into glue solution, putting down the ballast roll, adjusting the gap between the upper and lower glue discs and the glue spreader to be slightly smaller than the thickness of the single-faced paperboard to pass through, enabling the gaps of the two ends to be equal, installing the required surface paper on the Yunshan YWZJ-D-2500 shaftless support, enabling the surface paper to be smooth and clean, observing whether the glue spreading amount is proper or not after starting up, and adjusting the glue spreading amount improperly. After the single-sided paper board and the facial tissue are conveyed from the triple preheater, the single-sided paper board and the facial tissue are manually guided to pass through the preheating roller and the glue spreading roller, then the transmission belt is tensioned, the speed regulating button of the double-sided machine is slowly rotated, the single-sided paper board and the facial tissue are aligned and are conveyed into the dryer together, the ballast roller is put down, the glue spreading roller is started, wherein the gluing amount is 50g/m²Wherein the speed of the dryer is 250mm/min, the first group of hot plates is 40 ℃, the second group of hot plates is 50 ℃, the third group of hot plates is 60 ℃, the fourth group of hot plates is 50 ℃, the opening of the air cushion valve is 35 percent, the ballast roller is lifted up after production, the glue spreading roller is stopped, the glue spreading valve is closed and dischargedThe glue solution in the glue tray is dried, the drying is stopped, and the glue tray, the glue spreader and sundries on the conveying belt are cleaned after the conveying belt is lifted; fourthly, longitudinally and transversely cutting, effectively adjusting the width of the cut edge, ensuring that the paperboard has no phenomena of burr, material shortage and tile exposure, and cleaning in time after the longitudinally and transversely cutting is finished; fifthly, stacking paper boards: the paperboard stacking machine is used for stacking and placing the paperboards on the tray, the paperboard stacking needs to be tidy without collision and deflection, and the front and back 10 pieces form one turn; the fifth step: die cutting of the paperboard: and (3) processing on a machine and die cutting: making an indentation plate, adjusting the pressure of a machine table and a correction template, correcting the plate and adjusting the pressure of a die-cutting machine, placing die-cutting adhesive tapes, forming an indentation bottom die on a bottom die steel plate, fixing the made die-cutting plate on the die-cutting machine table, wherein the distance between die-cutting cutters is 8mm, and selecting the die-cutting adhesive tapes with the hardness of HS 600; the die-cutting adhesive tape is required to be away from the two sides of the die-cutting knife body by 2mm, the die-cutting speed is 4000 sheets/h, the die-cutting pressure is 120t, and the thickness of the corrugated board is 3 mm; sixthly, adhering the box: when the adhesive box is adhered, the surface of a product is free from friction, scratches and dirt, the gluing amount and the width of the box inlet are adjusted, the adhesive quality is frequently checked in the process, and the phenomenon that the inside and the outside of the adhesive are not adhered due to glue penetration and glue overflow is ensured. The adhesive is polyvinyl alcohol PVA088-35 mass percent. The corrugated base paper is kraft liner board paper, and has ring crush index of 11.4 N.m/g and quantitative weight of 285g/m²And the ring crush strength of the tea board paper: 133N/cm, 314g/m of tea board paper²The A type cold corrugated paper box has the size of 0.5m multiplied by 0.4m multiplied by 0.2m, 9 layers of single load-bearing 15kg piles, the relative humidity of the environment of 10 days is 90 percent, the compression strength of the paper box is 5840N, the ring crush strength of the paper board is 1074N/cm, and the burst strength is 16.5kgf/m²The puncture strength is 83kg-cm, the paper has no crack after opening and closing for 5 times at 180 degrees, the water content is 8 percent, and the bonding strength is 6 kgf/corrugation & 10 cm.

Note: the reference bursting strength and the bursting index are determined according to the determination of GB/T454-2020 paper bursting strength; the transverse ring crush strength and the transverse ring crush index are measured according to the measurement of GB/T2679.8-2016 paper and paperboard ring crush strength; measuring the moisture of GB/T-2008462 paper, paperboard and pulp analysis samples; measuring the puncture strength of GB/T2679.7-2005 paperboard; GB/T6543 once again transport packaging with single corrugated box and double corrugated paper box; GB/T6544-; GB/T6545-; GB/T6546-1998/determination of the edge crush strength of corrugated cardboard; GB/T6548 and 2011 a method for measuring the adhesive valley strength of corrugated boards.