Zippers are a common household item in life and are widely used in clothes, shoes and other types of clothing, and are popular for their convenience and ease of use. However, due to the different materials and quality of zippers, sometimes it can cause difficulties in using zippers, such as not being able to pull or not being able to tighten. Therefore, when producing and purchasing zippers, zipper testing is required so that the quality and safety of zipper use can be guaranteed. This article will introduce how to perform zipper testing?
First, the zipper needs to be inspected for appearance. This step is very simple, only need to carefully observe whether there are defects such as scratches, rust, asymmetry and loose fiber on the surface of the zipper. If there are these problems, then the zipper is likely to have risks in use.
2.Tensile strength test
Tensile strength test is one of the main ways to check zippers. In the pull test, you need to pull the zipper slowly until it breaks when you can't take it anymore. In the tension test, the following things need to be noted:
First of all, the type of zipper needs to be considered. For example, metal zippers can withstand larger pulling force, while nylon zippers need smaller pulling force.
Secondly, the length of the zipper needs to be noted. Zippers with different lengths have different load-bearing capacity.
Finally, we should pay attention to the uniformity of the zipper during the tension test, so that the zipper cannot be biased to one side or have obvious tightness.
3. Durability test
Durability test is to test the durability and life of zippers under different usage conditions. This test is performed by cyclically pulling the zipper to test its durability. The following matters need to be noted during the test:
Firstly, it is necessary to consider the environment of the zipper, such as whether the zipper needs to withstand high or low temperature environment, etc.
Secondly, the material of the zipper should be considered, whether it can withstand heavy pressure and other high-intensity use.
Finally, the zipper needs to be cycled open and closed several times to test its durability.
4. Corrosion resistance test
The zipper may be affected by oxidation and rust during a long period of use, so a corrosion resistance test is required. This test involves exposing the zipper to a specific environment, such as acidic, alkaline, high humidity, etc., to check the zipper's corrosion resistance. The following matters need to be noted during the test:
Firstly, you need to choose the right environment for the material, for example, metal zippers need to be tested in acidic or high humidity environment in order to test their corrosion resistance.
Secondly, the test time should be noted to ensure reliable test results.
Finally, it is necessary to check whether the surface of zipper is affected by corrosion, rust and so on.
Through the above tests, we can better understand the quality and performance of zippers to ensure that we buy reliable zippers, and we can also develop a zipper use or maintenance plan based on the test results to avoid accidents.