This not only makes movement inconvenient but also easily soaks their books. Addressing this pain point, the student backpack umbrella was developed—it cleverly integrates the functions of an umbrella and a backpack, achieving simultaneous protection for
In the fast-paced life of modern cities, automatic finished umbrellas are widely favored for their convenient one-button opening and closing.
Going to and from school in the rain is an unavoidable challenge for many students.
Self-healing coatings, on the other hand, use microencapsulated repair agents that automatically release repair substances to fill in damage when microcracks appear in the coating.
The phosphating process generates a phosphate conversion film on the umbrella frame surface through a chemical reaction, which serves as the base for subsequent coatings.
The impact of the splicing process on the waterproofness of a finished umbrella is essentially a trade-off between production efficiency and protective performance.