Manufacture of main materials of various corrugated paper carton and packaging,corrugated core paper quality and intensity will directly affect the quality of cartonor packaging. Requirements of the quality and strength of corrugated paper,corrugated cardboard production line is affected and restricted the production process and operation, on the other hand, the packaging products and requirements for the use of. Determination of strength parameters of corrugated board so strict is very important in all aspects of packaging printing and production,to ensure product quality and performance has a vital significance.
Accurate measurement and sampling of corrugated board is the first step. The highest representative sample to the characteristics of the whole batch of products,but also less as far as possible. In our country is 3% of the standard rules ~ ~ 5%,can also according to the specific situation of the production scale and sampling.Sampling and frank treatment, make decisions under the specific conditions of thedata, the data can be in the same conditions are compared. The physical and mechanical properties of paper and board, has a great influence on airtemperature and humidity. In the wet process before measurement is necessary for the proper tone. Strength index and test method we introduce corrugated board.
1, corrugated board and carton board ring crush strength
To determine the base paper or paperboard width along the direction(perpendicular to the thickness of the paper), compressive strength, is more difficult. Because the thickness of paper or cardboard small, straight in the paper thickness direction along the vertical pressure, and base paper or cardboard to maintain the stability of the shape, is very difficult to achieve. If the rings roundpaper or paperboard, pressure in the form of a much better stability. Therefore, in a circular paper or cardboard ring, and then measure its compressive strength,which is the base of the ring crush strength of paper or paperboard. Is measured in the pressure testing machine small.
The scale of 2, the compressive strength of corrugated core
Corrugated cardboard, can be maintained with a certain thickness, so that theboard have great inertia, is the main objective of corrugated paperboardcompression deformation. Corrugated paper is this role, and in the reliability ofcorrugated paper properties of single is closely connected with the. Corrugated paper stress and strain, and the effect of high-speed, the formation of thecorrugated uniform profile, and firm and paper joint.
Corrugated slots available grain corrugated core flat compressive strength to measure the role of. Corrugated core compressive strength, the size of the firstdetermination, corrugated paper, at a certain temperature and under a certain pressure and slot food according to the corrugated shape test. (KGF), and then in the testing machine for small flat compression test, to measure its carrying capacity, denoted by KN.
3, the scale of the corrugated plate pressure strength
Characteristics of corrugated cardboard 1 inherent is generally greater than cardboard with inertia. When the inertia effect of corrugated board under pressure,still maintain their original thickness, the premise to maintain its inherentcharacteristics of the. Therefore, the corrugated cardboard flat pressure load, and no broken ability, is an important corrugated cardboard intensity index. The use ofcorrugated cardboard with flexibility, and various processing in the production ofcarton, can maintain the original cardboard index is of special importance.
Corrugated paper strength, vertical effect on unit area size in board representation of force, unit for the kpa. Determination of compressive strength of corrugated paperboard, pressure testing machine can use small, using circular sample, 5.13 cm in diameter.
4, corrugated cardboard marginal pressure strength
Corrugated box is different from the bag, because it is as a rigid container and use,when in use, to maintain a certain shape. Broken main form of corrugated carton damage, loss of rigidity. A large number of studies have shown that, A shares indexreflects the rigid box, carton compressive strength, and directly related to the corrugated side pressure strength.
Corrugated cardboard edge pressure strength is along the direction of the loading capacity under compression, the force per unit length representation of corrugated paperboard, the unit is N / M, the index can be used to compare similar productionconditions, but the quality is not the same batch of products, can also be used forcorrugated paper board comparison of different materials produced by thepressure side.
Determination of compressive strength, can be used for pressure testing machinesmall. And all of 100 mm * 100 mm area, connecting piece, the rest of therequirements and the determination of the strength of the same flat pressingrequirement. The other two piece sample rectangle metal GIB, 100 mm long, 20 mm x 20 mm cross section.
5, a certain degree of resistance
The level of resistance is considered to be an important quality index of corrugated board and its components (paper core, in the face of paper and paper). In the early days, even all the corrugated cardboard quality standards, mainly in the resistancebase level. Although the compressive strength index, the current standard ofattention has been paid to such as edge, but the degree of resistance is still of great significance. Because in the using process of the board of directors shall be broken, and the measures of resistance, similar pressure. Say it in resistance, loaddoes not burst of paper or cardboard, paper or paperboard crushing capacityunder no external pressure. The resistance measuring instrument to measure the degree of.
6, through the strength
Tear strength was used to measure the corrugated paper project, by penetrating the impact resistance, when any damage, it is a comprehensive index. Recent studies have shown that, longitudinal and transverse tear strength of noodlespaper and corrugated paper, corrugated paper, has an important impact on twodirection core flat corrugated cardboard compressive strength of the force.Recently the strength becomes more and more important, and many countries have already put the index in the quality specification for corrugated paper.
With the determined by strength test
