Method for checking the electrostatic effect of anti-static shoes
1 product classification
1.1 Anti-static shoes
a) Anti-static PU leather shoes;
b) Anti-static cloth-covered PVC rubber-soled shoes.
1.2 Conductive shoes
a) Conductive leather shoes;
b) Conductive cloth rubber-soled shoes.
2 Technical requirements and test methods
1.1 Electrical performance (ESD)
1.1.1 The resistance range of anti-static shoes is 100kΩ～1 000MΩ.
1.1.2 Conductive shoes The resistance value is not more than 100 kΩ.
1.2 Physical and mechanical properties
1.2.1 Anti-static leather shoes and conductive leather shoes should comply with QBl002～1005 regulations.
1.2.2 Anti-static cloth rubber-soled shoes and conductive cloth rubber-soled shoes shall comply with HG/T 2495 regulations.
3 Inspection rules
3.1 Factory inspection
The quality inspection department of the manufacturer is responsible for inspecting the electrical performance of the shoes one by one, and only if they meet the standards can they leave the factory.
3.2 Type inspection
3.2.1 Type inspection should be carried out when one of the following conditions exists for type inspection:
a) Trial-making type appraisal of new products or product transfer to factory production;
b) During the production process, if major changes in structure, materials, and processes may affect product performance;
c) Perform periodic inspections every six months for normal production;
d) When the product is stopped for more than 6 months and resumes production;
e) When there is a big difference between the factory inspection result and the last type inspection result;
f) When the national quality supervision agency puts forward a requirement for type inspection.
3.2.2 Type inspection items
3.2.2.1 Type inspection items of anti-static leather shoes and conductive leather shoes:
a) Electrical performance (ESD);
b) Outsole is resistant to folding;
c) Outsole is wear-resistant;
d) Peel strength of finished shoes;
e) Outsole rubber hardness.
3.2.2.2 Type inspection items of anti-static cloth rubber-soled shoes and conductive cloth rubber-soled shoes:
a) Electrical performance (ESD);
b) Adhesion strength between the strip and the upper surface;
c) Outsole rubber tensile strength;
d) Elongation at break of outsole rubber;
e) Outsole wear reduction;
f) Outsole rubber hardness (Shore A).