Adhesion strength test principle and method

The principle of bond strength test is to insert the pin attachment between the corrugated paper and the paper (or paper, paper) and then apply pressure to the sample to make it move relative to each other, resulting in complete separation of corrugated paper samples. . Currently, accessories for adhesive strength testing are unilateral and bilateral. Therefore, the test method is also divided into a single-sided method and a double-sided method.

The single-sided method inserts the upper and lower needle attachments into the same side of the single-layer corrugated sheet in sequence, and the test data reflects the adhesive strength of the bonded sheet. In the double-sided method, the upper and lower needle attachments are inserted into the opposite side of a single-layer corrugated sheet, and both sides of the same Iridium layer are peeled at the same time during the test. The side with poor adhesive strength is first separated from the peak, and the test data reflect The bonding strength of the bonding surface with poor bonding strength of the same ruthenium layer.

Comparing the two methods can be found: the single-sided method needs to peel off each combination surface of the corrugated paperboard, which is cumbersome. It is suitable to analyze the bonding strength of each bonding surface. The double-sided method is relatively simple, and it is easy to find joint surfaces with poor adhesive strength, but it does not reflect the adhesive strength of each joint surface. It is often used to analyze and determine whether the adhesive quality of the entire corrugated cardboard is acceptable.

In addition, in actual tests, it was found that whether the single-sided or double-sided tests are used, the number of genuinely peeled corrugated sheets is at most n-1, that is, at least one peak at the edge of the specimen is only subjected to unidirectional tension. The effect is unbalanced and therefore often cannot be stripped.