Key Inspection Processes for Zippers
Visual Inspection
Check for consistent color, finish, and surface defects (scratches, dents, or discoloration).
Verify alignment of teeth/slider and ensure no missing or misaligned elements.
Functionality Test
Test the slider’s smooth movement up and down (no jamming or stiffness).
Ensure the zipper locks properly (if applicable) and stays closed under slight tension.
Strength Testing
Pull Test: Apply force to the zipper tape and teeth to verify durability (meets specified kgf/lbs standards).
Slider Retention Test: Ensure the slider does not detach during normal use.
Size/Dimension Check
Confirm length, width, and tooth size match specifications using calipers or measuring tape.
Material Verification
Validate material composition (e.g., metal/plastic teeth, polyester/nylon tape) against requirements.
Endurance Test (Sampling)
Repeatedly open/close the zipper (e.g., 500+ cycles) to assess wear resistance.
Packaging & Labeling
Inspect packaging for damage and confirm labels (size, material, batch number, etc.) are accurate.
