This standard specifies the method of determining the burst strength of corrugated cardboard by the hydraulic increase method. 2, reference standards The provisions contained in the following standards are incorporated into this standard and constitute the provisions of this standard. At the time of publication, the editions indicated were valid. All standards will be revised and all parties using this standard should explore the possibility of using the latest version of the following standards. 3, the definition This standard uses the following definition. 4, test principle Place the sample on top of the film and clamp it with the sample holder. Then apply pressure evenly so that the sample is free to protrude with the film until it breaks. The sample burst strength is the maximum value of the applied hydraulic pressure. 5, test equipment 5.1 Sample chuck system Upper chuck diameter (31.5 ± 0.5) mm, lower chuck hole diameter (31.5 ± 0.5) mm. The upper and lower clamp rings should be concentric, and the maximum error should not exceed 0.25mm. The two clamp rings are parallel and flat to each other. The contact surface is evenly distributed when measured. 5.2 Film The film is circular and consists of an elastic material. The film is firmly clamped, and its upper surface is approximately 5.5 mm lower than the top surface of the lower clamp ring. The film material and structure shall be such that the height of the lower protrusion of the film is adapted to the elastic resistance, that is, when the protrusion height is 10 mm, the resistance range is (170-220) kPa; when the protrusion is 18 mm, the resistance range is It is (250-350)kPa. 6, the sample taken and processed 6.1 Take samples according to the provisions of GB 450. 7, the preparation of the sample The specimen area must be larger than the chuck of the burst tester, and the specimen must not have watermarks, creases or obvious damage. Do not use specimens that have been pressed by the chuck during the test. 8, test steps Tailored and tested under the atmospheric conditions specified in 6.2. Open the specimen chuck, clamp the specimen in the middle of the two specimen chucks, and then turn on the analyzer to gradually increase the pressure at (170 ± 15) mL/min. When the sample is blasted, read the value indicated on the pressure gauge. Then release the chuck and return the reading pointer to the starting position. The data should be discarded when there is significant slippage of the sample. 9, the results that The measurement was carried out on each of 10 specimens facing the film on the front and back sides and expressed as the arithmetic mean value (kPa) of all the measured values. 10, test report The test report includes the following: Source: Bison
This standard applies to corrugated board with a bursting resistance of 350 to 5500 kPa.
GB 450-89 Standard atmosphere for the treatment and testing of paper and paperboard samples using GB 10739-89 pulp, paper and paperboard samples
Bursting strength
Under test conditions, the corrugated board can withstand a uniform increase in the maximum pressure perpendicular to the surface of the specimen per unit area.
To prevent the specimen from slipping during measurement, the sample chuck should have a clamping force of not less than 690 kPa. However, such pressure will generally cause the corrugations of the sample to collapse and should be noted in the report.
6.2 Samples should be treated according to GB 10739 temperature and humidity.
a) the national standard number;
b) sample types, specifications;
c) the criteria used for the test;
d) atmospheric conditions at the test site;
e) the name and model of the tester used and the clamping force used;
f) The average value of the bursting strength of the front and back of the board, and retain three significant figures;
g) Test date, place, test personnel, etc.
Corrugated board
1 Scope