Backpacks usually undergo a series of testing items before leaving the factory to ensure their quality and safety. Here are some possible factory inspection items:
1. Appearance check: Check the appearance of the backpack, including whether the stitching is neat, whether the zipper is smooth, whether there is damage or stains.
2. Strength test: The backpack usually needs to withstand a certain degree of heavy load, and the tester will perform a tensile test on the backpack to assess the strength of its material and structure.
3. Zipper test: Check whether the zipper of the backpack can be smoothly opened and closed, and whether it can be firmly maintained in the closed state.
4. Material testing: The materials used in backpacks are tested to confirm that they meet relevant standards, such as waterproof performance and tear resistance.
5. Load test: the load bearing capacity of the backpack is tested to determine its reliability within the design load range.
6. Lock test: Test the buckle, adjustment belt and other lock parts of the backpack to ensure that they can firmly fix the backpack and are not easy to loose.
7. Reliability test: The backpack is repeatedly dropped, squeezed and other tests to assess its reliability and durability in daily use.
These are common factory testing items, and specific testing standards and processes may vary by manufacturer and backpack type. Manufacturers usually follow the relevant national and industry standards to perform these tests.
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