one. The carton is composed of various layers of paper. The proper matching of the carton compressive testing machine paper is the basic condition for ensuring the compressive strength of the carton.
Through the testing of the physical properties of various layers of paper, we can initially calculate the compressive strength of the carton, and then through the calculated compressive strength, the carton compression tester controls the compressive strength of the carton during each process in the production process.
two. The ring pressure strength of the paper is the key to ensure the compressive strength of the carton, but the other physical properties of the paper can not be ignored.
When the tensile strength of paper, especially crepe paper, is not enough, the carton compressive tester carton will have a steady increase in the value of force and deformation during the compression test. The final value is very high and the effective force value is very low. The box is deformed after the test. Such as the accordion situation. Waterproof performance of paper is also very important. In particular, the refrigerated box has higher requirements on the waterproof performance of paper. Sometimes, although the compressive strength of the carton is high, because the paper is not waterproof, the carton is easy to absorb moisture when it is stored in the cold storage, resulting in a .
three. The carton production process also affects the compressive strength.
Through tests, under the same conditions, the width of the transverse pressure line of the carton compression tester carton is increased by 1 mm, the compressive strength of the carton is reduced by 90 N to 130 N, and the deformation is increased by about 2 mm. If the pressure line is too wide, the force value of the carton during the compression test will increase slowly, the effective force value will be small, and the final deformation will be large. In order to ensure the compressive strength, we should try to improve the production process and reduce the impact of various processes on the compressive strength of the carton.
four. It is also critical to choose the right type based on the type of carton.
In people's consciousness, it is often believed that the larger the carcass type is, the higher the compressive strength of the carton is, and it is easy to overlook the influence of the carp type on the amount of deformation. The larger the carcass type, the greater the compressive strength of the carton and the greater the amount of deformation; the smaller the carp type, the lower the compressive strength of the carton and the smaller the amount of deformation. If the carton is too large, the carp type is very small, and the carton is easily crushed during the pressure test; the carton is too small, the carp type is very large, and the deformation is excessive when the pressure test is performed. The carton compression test machine The buffering process is long and the effective force value deviates too much from the final force value.
Fives. The effect of moisture on the compressive strength of the carton is even more negligible.
Carton production environment, storage environment, use of the environment, weather, climate and other factors will affect the moisture content of the carton, in order to ensure the compressive strength of the carton, should try to avoid the impact of external environment on the carton moisture content, keep the carton dry.