GB/T 38529-2020 English PDF (GBT38529-2020)

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GB/T 38529-2020: Requirements of concentration limits for restricted substances in tyres
GB/T 38529-2020
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.160.10
G 41
Requirements of concentration limits for restricted
substances in tyres
ISSUED ON: MARCH 06, 2020
IMPLEMENTED ON: FEBRUARY 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Raw materials that shall not be used in tyres ... 5 
5 Restricted substances and requirements in tyres ... 6 
6 Test method ... 6 
7 Specimen preparation ... 7 
8 Determination principles ... 7 
Annex A (informative) Raw materials for tyre production that may exist or
produce restricted substances ... 8 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Tyre rims of Standardization Administration of China (SAC/TC 19).
The drafting organizations of this Standard: Triangle Tire Co., Ltd., Shandong
Linglong Tire Co., Ltd., Shandong Fengyuan Tire Manufacturing Co., Ltd.,
Double Star Group Co., Ltd., Beijing Rubber Industry Research and Design
Institute Co., Ltd., Jiangsu Academy of Inspection and Quarantine Science and
Technology, Zhongce Rubber Group Co., Ltd., Shuangqian Tire Group Co., Ltd.,
Fengshen Tire Co., Ltd., Wanli Tire Co., Ltd., Qingdao Senqilin Tire Co., Ltd.,
Sichuan Tire and Rubber (Group) Co., Ltd., Guizhou Tire Co., Ltd., Xiamen
Zhengxin Rubber Industry Co., Ltd., Pulin Chengshan (Shandong) Tire Co., Ltd.,
Ningxia Shenzhou Tire Co., Ltd., Sailun Group Co., Ltd., Jinyu Tire Group Co.,
Ltd., Shandong Huasheng Rubber Co., Ltd., Tianjin Wanda Tire Group Co., Ltd.,
Shandong Taishan Tire Co., Ltd., China Quality Certification Center, Michelin
(China) Investment Co., Ltd., Dalian Goodyear Tire Co., Ltd., Continental Horse
Tire (China) Co., Ltd., Bridgestone (China) Investment Co., Ltd., Pirelli Tire Co.,
Ltd., Sumitomo Rubber (China) Co., Ltd., Han Thai Tire Co., Ltd., SAIC-GM-
Wuling Automobile Co., Ltd.
Main drafters of this Standard: Ni Shujie, Ma Xiuju, Chen Shaomei, Pan Chao,
Wang Lufei, Xu Lihong, Mou Shouyong, He Zhonghui, Ren Fujun, Fang Zhijun,
Wang Xiaojuan, Cheng Mei, Zhang Kaikai, Zhang Junwei, Li Daiqiang, Chen
Jianming, Liu Changbo, Chen Gang, Shi Qingyun, Li Weiguo, Chen Jianjun, Yu
Zhenjiang, Wang Junling, Zhao Xiang, Ye Wei, Yin Qingye, Ma Zhong, Zhu
Cheng, Niu Fuxiang, Huang Xiaoqing, Liang Bin, Fang Hua, Wang Kexian, Li
Shuhuan.
Requirements of concentration limits for restricted
substances in tyres
1 Scope
This Standard specifies the raw materials that shall not be used, restricted
substances and requirements, test methods, sample preparation and
determination principles in rubber tyres (including inner tubes and cushion
tapes).
This Standard is applicable to rubber tyres (including inner tubes and cushion
tapes).
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 519, Test methods for measuring physical properties of pneumatic
tyres
GB/T 6326, Tyre terms and definitions
GB/T 9874, Determination of lead content by atomic absorption spectrometry
GB/T 26125, Electrical and electronic products - Determination of six
regulated substances (lead, mercury, cadmium, hexavalent chromium,
polybrominated biphenyls, polybrominated diphenyl ethers)
GB/T 29607, Rubber product - Determination of cadmium content - Atomic
absorption spectrometry
GB/T 29610, Rubber products - Determination of polybrominated biphenyls
and polybrominated diphenyl ethers - Gas chromatography and mass
spectrometry
GB/T 29614, Determination the content of polycyclic aromatic hydrocarbons
in vulcanized rubber compounds
SN/T 3814, Determination of short chain chloroparaffin in rubber and plastic
5 Restricted substances and requirements in tyres
5.1 Polycyclic aromatic hydrocarbons (PAHs)
Tested by nuclear magnetic resonance hydrogen spectroscopy (1H NMR)
method, the polycyclic aromatic hydrocarbons in the tyre shall have a H Bay
content not greater than 0.35%.
5.2 Lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr6+)
The content of lead (Pb), mercury (Hg), cadmium (Cd), and hexavalent
chromium (Cr6+) in the tyre shall meet the limit requirements in Table 2.
Table 2 -- Limit requirements for lead (Pb), mercury (Hg), cadmium (Cd),
and hexavalent chromium (Cr6+) in tyres
No. Restricted substance Limit requirements (mass fraction) %
1 Lead (Pb) ≤0.1
2 Mercury (Hg) ≤0.1
3 Cadmium (Cd) ≤0.01
4 Hexavalent chromium (Cr6+) ≤0.1
5.3 Polybrominated biphenyls (PBBs) and polybrominated diphenyl
ethers (PBDEs)
The total amount of polybrominated biphenyls (PBBs) and polybrominated
diphenyl ethers (PBDEs) in the tyre shall be no more than 0.1% (in terms of
mass fraction).
5.4 Short-chain chlorinated paraffin (SCCP) (compounds with a carbon
chain length of C10~C13)
The content of short-chain chlorinated paraffin (SCCP) in the tyre shall be no
more than 0.1% (based on mass fraction).
5.5 Raw materials for tyre production that may contain or produce
restricted substances
See Annex A for raw materials for tyre production that may exist or produce
restricted substances.
6 Test method
6.1 The content of polycyclic aromatic hydrocarbons in tyres is determined
according to ISO 21461. The PAH content of the filling oil is measured
according to EN 16143.