China - Update of the Industrial Standard for Leather Shoes

Replace peeling strength by pull-out strength, when one of following conditions occurs:

• thickness of the flexing position of sole is above 25mm
• the width of outsole at the position 10mm from the tip is less than 25mm
• hardness of outsole is less than 50 shore A

Test is exempt when one of the following conditions happens:

• shoe size less than 230mm
• bending angle less than 45°during rigidity test according to clause 8.4.1 of GB/T 20991-2007
• heel height above 70mm
• thickness of flexing position of sole above 25mm

• If the test results of abrasion resistance are free of grinding crack, it is judged as compliant.
• If the outsole is abraded through or there is under-cure phenomenon, it is judged as non-compliant.

Abrasion resistance of assembled top piece shall meet the requirement as below:

• relative volume loss≤200mm³ (if density ρ≥0.9g/cm³)
• relative mass loss≤150mg (if density ρ＜0.9g/cm³)

• high-class grade≥700N
• qualified grade≥500N

• High-class grade≥1000N
• Qualified grade≥700N

• when heel high≤50mm, heel hardness≥55 shore A;
• when heel high＞50mm, heel hardness≥75 shore A

Cellular material:

• when heel high≤50mm, heel hardness≥60 shore C;
• when heel high＞50mm, heel hardness≥75 shore C

Non-cellular material:

• when heel high≤50mm, heel hardness≥55 shore A;
• when heel high＞50mm, heel hardness≥70 shore A

Normal material:

• wet rub, staining not less than Grade 3

Suede:

• wet rub, staining not less than Grade 2

The following shoes must be assembled with steel shank or other rigid support material:

• Woman’s shoes with a heel height above 20.0mm and a heel breast height above 8mm;
• Men’s shoes with a heel height above 25.0mm and a heel breast height above 10mm

Textile:

• should not be used

Leather:

• should not be used

• Direct contact with skin (Category B)≤75mg/kg；
• Not direct contact with skin ( Category C)≤300mg/kg

• Men's shoes, ≥ 90N/cm
• Women's shoes,≥ 60N/cm

• Men's shoes, ≥ 70N/cm
• Women's shoes, ≥ 50N/cm

Shoes, whose uppers are ovine leather or man-made materials, or the thickness of the toe part of the outsole is less than 3mm, or the width of outsole is less than 40mm measured at the position 20mm distance to the tip, ≥ 40N/cm,
When materials have torn but the upper and sole are still bonded, ≥ 30N/cm

• ≥ 20 N/cm
• When cellular soles have torn but are still bonded ≥15 N/cm

• The length of the cut after flexing ≤10.0mm,
• No new crack in outsole.
• No damage on upper.
• No bonding failure on upper-sole, foxing, welt and footwall.
• No peeling off on combined sole.
• No decoating on sole and footwall.

• The length of the cut after flexing ≤20.0mm.
• No new cracks in more than 3 positions on outsole, and each crack ≤5.0mm.No damage on upper.
• No bonding failure on upper-sole, foxing, welt and footwall.
• No peeling off on combined sole.
• No decoating on sole and footwall.

• density ρ ≥ 0.9g/cm³, relative volume loss ≤ 200mm³,
• density ρ ＜0.9g/cm³, relative mass loss ≤ 150mg

Heel high ≤50mm:

• non-cellular material ≥55 shore A,
• cellular material ≥60 shore C;

Heel high ＞50mm:

• non-cellular material ≥70 shore A,
• cellular material ≥75 shore C;

Normal material:

• wet rub, staining not less than Grade 3

Suede:

• wet rub, staining not less than Grade 2

Longitudinal stiffness of steel shanks
( GB 28011-2011)

Heel high＜50mm:

• ≥ 400kN•mm²

Heel high（50～74）mm:

• ≥ 800kN•mm²

Heel high＞74~99mm:

• ≥ 1200kN•mm²,

Heel high＞99mm:

• ≥ 1600kN•mm²

Heel high ≥ 30mm：

• ≥ 43.5 HRC or ≥72.5 HRA or ≥82.0 HR15N;

Heel high＜30mm：

• ≥ 22. 5HRC or ≥61.5 HRA or ≥70.0 HR15N

Heel high＜50mm:

• ≥ 600kN•mm²,

Heel high（50～74）mm:

• ≥ 1000kN•mm²

Heel high＞74~99mm:

• ≥ 1500kN•mm²,

Heel high＞99mm:

• ≥ 2000kN•mm²

Textile:

• should not be,used ( limit value not exceeding 20mg/kg)

Leather:

• should not be,used (limit value not exceeding 30mg/kg)

• direct contact with skin (Category B), ≤ 75mg/kg
• not direct contact with skin ( Category C), ≤ 300mg/kg