HG/T 2699-1995 Specifications for hard rubber for vehicle batteries

HG/T 2699-1995 Technical conditions for hard rubber for vehicle batteries HG/T2699-1995 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Technical conditions for hard rubber for vehicle batteriesContent and scope of application
HG/T2699-95
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage requirements for hard rubber materials for lead-acid batteries.
This standard applies to hard rubber materials for lead-acid batteries with an operating temperature of -50 to 60°C in motor vehicles and engineering machinery. 2 Reference standards
Determination of power frequency breakdown dielectric strength and withstand voltage of vulcanized rubberGB/T 1695
GB/T 1696
GB/ T 1697
GB/ T 1699
GB/T 2438
Determination method of transverse breaking strength of hard rubberTest method for impact strength of hard rubber
Test method for heat resistance of hard rubber
Test method for crushing strength of soft rubber
JB3076 Lead-acid battery
3 Technical requirements
3.1 The raw materials and manufacturing process of hard rubber shall comply with the requirements of relevant technical specifications. 3.2 Appearance quality
The rubber material shall be mixed evenly and checked with a magnifying glass with a magnification of 5 times. No agglomerates and impurities larger than 0.2mm are allowed. 3.3 Physical properties
The physical properties of hard rubber shall comply with the provisions of Table 1. Physical properties of hard rubber
Breakdown strength, kV/mm
Transverse breaking strength, MPa
Impact strength, I/ m
Crushing strength, MPa
Martin heat resistance, ℃
Iron content, %
4 Test method
4.1 Visual inspection of material appearance,
not less than
Approved by the Ministry of Chemical Industry of the People's Republic of China on May 5, 1995
3. 0 × 10+
Implementation on January 1, 1996
4.2 Physical properties
HG/ T 2699 —95
4.2.1 Breakdown strength. The test shall be carried out in accordance with the test method specified in GB/T 1695. 4.2.2 Transverse breaking strength, test according to the test method specified in GB/T1696, 4.2.3 Impact strength, test according to the test method specified in GB/T1697, 4.2.4 Crushing strength, test according to the test method specified in GB/T2438, 4.2.5 Martin heat resistance, test according to the test method specified in GB/T1699, 4.2.6 Iron content, test according to the test method specified in JB3076, 5 Inspection and testing
5.1 The same rubber materials produced by the same class and machine are considered as a batch 5.2 Appearance quality The quantity should be checked batch by batch, Www.bzxZ.net
5.3 Take one roll of rubber from each batch and test the hard rubber's transverse breaking strength, impact strength and crushing strength. 5.4 The Martin heat resistance and iron content performance tests of hard rubber should be sampled once a month: the breakdown strength of hard rubber should be sampled once a quarter. 5.5 When the test results are unqualified, double the samples should be taken and the unqualified items should be re-tested. If the re-test is unqualified, the rubber is allowed to be refined once. After the refinement, a full performance test must be carried out. If one of them is still unqualified, the rubber is unqualified. At the same time, the batch of rubber should be inspected roll by roll. The same shall also apply to the items for random inspection.6 Marking, packaging, transportation and storage
6.1 Each batch of rubber materials shall be accompanied by a certificate of conformity, indicating the technical standard number, rubber material code, batch number, quality, production unit (or code), manufacturing date, and the seal of the inspection department.
6.2 The rubber materials shall be packaged with materials that do not damage or pollute the rubber materials, and then packed into packaging boxes. The mass of each box shall not exceed 50 kg.
6.3 During transportation, the rubber materials shall not come into contact with corrosive and other harmful substances, and shall be protected from direct sunlight and rain and snow. 6.4 The rubber materials shall be stored in an environment with a temperature of 0-28°C, a relative humidity of no more than 80%, and proper ventilation, 1m away from heat sources, and avoid the above conditions. The storage period of the rubber materials is 3 months from the date of production. The rubber materials that exceed the storage period shall be subject to full performance inspection as specified in Table 1. Only after passing the test can it be used. Additional instructions:
This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Northwest Rubber Industrial Products Research Institute of the Ministry of Chemical Industry. This standard is drafted by the Northwest Rubber Industrial Products Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wen Fu, Huang Zuchang, Zhang Wei, Xu Kuanliang, and Li Xufu. This standard is not equivalent to TOCT6980--76 "Technical Conditions for Hard Rubber Battery Tanks for Automobile and Tractor Batteries".
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