There are two main aspects of fasteners during the testing process:

Firstly, it is a tensile test, which mainly tests the load-bearing capacity of the fastener and is divided into two steps to complete:

1. Instantaneous tensile test, mainly used for inserting buckles, D-buckles, and daily buckles, to test the strength of the buckle when suddenly encountering strong tensile force.

2. The main principle of endurance tensile testing is to determine the time value that the buckle can withstand when a certain weight of load is applied.

3. Regarding the inspection of the number of times the buckle has been used, it should be continuously opened and closed to test how many times the buckle will deform.

Three directional or multi-directional buckle detection is even more complex.

Secondly, it is a temperature test, which mainly tests the load-bearing capacity of the buckle under unconventional temperatures, divided into two types: high temperature and low temperature

1. The high temperature is usually set at 70 degrees Celsius

2. The low temperature is usually set at minus 30 degrees. Time is 24 hours, then test for changes in intensity.

Thirdly, it is a salt spray test, which mainly monitors the anti salinity of the fasteners. Some products can only be transported by sea, and long-term sea operation can have an impact on the quality of the products. This test is also divided into two steps.

1. Soak the buckle in seawater for 72 hours

2. Expose the soaked fasteners to sunlight for 5-7 days

3. Has there been any significant change in the testing intensity after completion.

There are also some tests, such as acid resistance testing, that can be tested according to different needs and materials. Among them, metal fasteners also need to be tested for rust prevention, corrosion resistance, drug resistance, etc. If plastic fasteners undergo post-processing of products, such as electroplating, water dyeing, oiling, etc., further testing is needed to determine whether these additional processes meet the standards.

Of course, there are also higher standard tests applied to extreme sports such as diving. UL certification, TS16949 certification, VDA6.0 standard, as well as EU ROHS standards, RAECH standards, EN-71 standards on infant and child products, are not something that ordinary fastener manufacturers can pass.

The above is a brief description of fasteners. With the continuous development of products and the increasing diversity of varieties, the testing in this area is also becoming more and more strict