The quality inspection items of mailing bags usually include the following aspects to ensure their safety, durability and functionality during transportation:
1. Appearance inspection
Color consistency: whether it is consistent with the design or order, and whether there is color difference.
Printing quality: the pattern/text is clear, without falling off, blurring, ghosting, or misprinting.
Surface defects: whether there are scratches, creases, bubbles, impurities, holes, etc.
Edge sealing neatness: whether the edges are neat, whether the cuts are smooth, and whether there are excess burrs.
2. Size and thickness detection
Bag size: whether the length, width, bottom/side widening, etc. meet the specifications.
Thickness test: use a thickness gauge to detect whether the thickness of each part is uniform and meets the standard.
3. Material performance test
Tensile strength: test the tear resistance of the bag body under stretching.
Puncture resistance: test whether the bag can withstand puncture by sharp objects.
Heat sealing strength: test whether the sealing part is firm and not easy to crack.
Low temperature performance test (if applicable to cold areas): Test whether the bag becomes brittle or breaks in a low temperature environment.
Water barrier/moisture resistance: Whether it has good waterproof and moisture resistance.
4. Functional inspection
Self-adhesive strip test: Whether the viscosity is strong, whether the seal is firm and not easy to open.
Whether it is easy to tear (such as with easy tear line): Convenient for customers to open and ensure the availability of the bag.
One-time seal verification: Whether it complies with the safety design of "no repeated opening after sealing".
Printing content verification: Whether the company information, barcode, prompts, etc. are correct.
5. Environmental protection and compliance inspection
Material inspection report: Whether PE and recyclable materials that meet environmental protection requirements are used.
Certification documents: Such as whether it has ISO9001, ISO14001, SGS and other certifications.
6. Packaging and quantity inspection
Packing quantity: Whether each box meets the specified quantity (such as 500/1000 pieces/box).
Packaging integrity: Whether the carton or strapping is firm and easy to transport.
The labels and markings are clear: Check whether the outer box has markings such as model, batch, quantity, etc.
