For the zipper inspection of digital bags, the following methods can be used to evaluate the performance and quality of zippers:

1. Visual inspection:

    Visual inspection is one of the most basic zipper detection methods. Visually inspect the appearance of the zipper, including the zipper head, chain teeth, sliders, etc., to determine whether there are obvious defects, damage, deformation or looseness. Visual inspection can find some obvious quality problems, such as broken chain, broken head, deformation, rust and so on.

2. zipper  hand feeling detection:

    Hand feeling inspection is to evaluate the quality of the zipper by touching and feeling the feel of the zipper. The zipper should have a smooth, uniform, light opening and closing operation, and slide smoothly without resistance. Hand feel detection can help judge whether the operation of the zipper is flexible and smooth, and find possible stuck, stuck or broken problems.

3. Zipper pull test:

    The pull test is used to evaluate the performance of the zipper when it is subjected to pulling force. Test the maximum load-carrying capacity and breaking strength of the zipper by applying a gradually increasing pulling force. The pull test evaluates the strength and durability of the zipper to ensure that it will not break due to force during use.

4. Zipper open and close cycle test:

    The opening and closing cycle test simulates the opening and closing operation of the zipper in actual use, and evaluates the durability of the zipper by repeating the opening and closing action of the zipper. During the test, different opening and closing speeds and cycle times can be set to simulate the actual situation under different usage conditions. The opening and closing cycle test can detect whether the zipper can withstand long-term opening and closing without damage or jamming.

5. Zipper sliding force test:

    The sliding force test is used to evaluate the resistance and smoothness of zipper sliding. By applying a certain force, the resistance and sliding performance of the zipper during sliding are measured. Sliding force test can help to evaluate the lubrication performance and smooth operation of the zipper, so as to ensure the smooth opening and closing of the zipper in use.

6. Zipper salt spray test:

    Salt spray testing is used to evaluate the corrosion resistance of zippers. In the salt spray test, zipper samples are exposed to a humid environment containing salt to simulate corrosion in a marine environment or high humidity environment. By observing whether the zipper has rust, fading, corrosion and other problems, evaluate its durability and anti-corrosion performance.

The above are several common methods for digital bag zipper detection. When conducting zipper testing, appropriate test methods and parameters can be selected according to specific product requirements and standards to ensure that the quality and performance of the zipper meet expectations. At the same time, it is recommended to refer to relevant industry standards and guidelines to ensure the accuracy and reliability of the testing process and results.