Corrugated cardboard is made into corrugated boxes by die cutting, indentation, nail box or glue box. Corrugated boxes are one of the most widely used packaging products, and the amount has always been the first of all kinds of packaging products. Includes calcium plastic corrugated boxes. For more than half a century, corrugated boxes have gradually replaced wooden boxes and other transportation packaging containers with their superior performance and good processing performance, becoming the main force of transportation packaging. In addition to protecting goods, facilitating warehousing and transportation, it also serves to beautify goods and promote goods. Corrugated boxes are green products, which are environmentally friendly and facilitate loading and unloading.
Corrugated box compressive strength refers to the maximum load and deformation of the box under the dynamic pressure applied by the pressure tester.
The anti-pressure test process is divided into four stages: the first is the pre-loading stage to ensure that the carton is in contact with the pressure-resistant machine platen; the second is that the transverse pressure line is depressed, at which time the load is slightly increased and the amount of deformation varies greatly; The third is the compression stage of the side wall of the carton. At this time, the load increases rapidly and the deformation increases slowly. The fourth is that when the carton is completely destroyed, this is the crushing point of the carton.
The manufacturing dimensions of the corrugated box outer flap are also a key part to be aware of. In the box type of the corrugated box outside the flap, such as 0201, 0204, 0207, etc., the theoretical value of the width of the flap width should be one-half of the manufacturing size of the box width. However, due to the rebound effect of the inner flap, the lid is not horizontal after being closed, but is slightly inclined, and the outer flap must have a certain gap at the joint. Therefore, the width of the outer flap is not half the width, but is slightly longer, so an amplification factor is added to the actual production. The magnification factor can be calculated by a trigonometric function. However, due to the plasticity of the carton itself, and for ease of calculation, most companies calculate a fixed magnification factor based on the thickness of the cardboard.
