The Chinese Ministry of Industry and Information Technology issued an
updated version of its product standard for slippers – QB/T 4552-2020 – on December
9, 2020. This came into effect on April 1, 2021, thereby replaced the previous
iteration – QB/T 4552-2013.
QB/T 4552-2020 applies to all forms of daily use slipper, except
disposable slippers.
There are multiple updates brought in by the new standard. These include
the following revisions:
- Appearance quality requirements – must comply
with GB/T 36975-2018, 5.2 - Pull-out force of the upper band :
- Cold gluing, sewing and gluing process – no
less than 80N - Rivet assembly – no less than 50N
- Torn material and band not pulled out from
the bonding – no less than 30N/cm
- Cold gluing, sewing and gluing process – no
- Abrasion resistance of outsoles – length of abrasion –
no more than 15.0mm (phenomenon of wearing through of the
outsole shall not appear) - Slip resistance – if a slipper has anti-slip
function, the wet dynamic friction coefficient must not be less than 0.4 - Colorfastness to rubbing of lining and insock:
- Suede and leather: wet, more than or equal to
Grade 2 - Leather, textile, fur, artificial wool and
other materials: wet, more than or equal to Grade 3
- Suede and leather: wet, more than or equal to
- Odor: less than or equal to Grade 3
- Decomposable harmful aromatic amine dyes:
- Textiles: no more than 20 mg/kg
- Leather, fur: no more than 30 mg/kg
- Free or partially hydrolytic formaldehyde
content:- Direct contact to skin: no more than 75 mg/kg
- No direct contact to skin: no more than 300
mg/kg - White sheared sheepskin: 600 mg/kg
- Bonding durability of the upper to sole: no
less than 25N/cm - Safety requires for infant and children’s
slippers – must comply with GB 30585
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There are also modifications to the inspection items and qualification
judgements, plus an added informative appendix – ‘list of harmful aromatic
amine dyes’.
Stakeholders
are advised to check their products against the latest product standard.
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