The main purpose is to ensure that the transmission shaft seal shaft high speed grease seal, to prevent vehicles (especially cars) important seal leakage, lack of technical standards, seal shaft mostly adopt advanced international standards.
The sealing strip of automobile transmission shaft domestic OEMs used mostly by the first generation of asbestos rubber material gradually upgrade to the second generation and the third generation fiber rubber cork material fiber micro bubble rubber cork material, yield and quality has been greatly improved.
The biggest characteristic of the drive shaft 1, the first generation of asbestos rubber material sealing film is low cost, able to adapt to the high pressure and high temperature produced by the high speed running of the drive shaft. But the biggest drawback is that it contains carcinogenic substances - asbestos, so it has been banned in foreign countries, especially the United States and the European union. However, there are still many low-end cars in use in china.
The biggest characteristics of the 2 and second generation fiber rubber cork material transmission shaft seal is not contain asbestos, but also can adapt to high pressure and high temperature produced by the high speed running of transmission shaft. But it has a higher requirement for the metal surface of the transmission shaft sealing surface, and the sealing surface must be smooth. Most of the current domestic production of transmission shaft factory in the use of this transmission shaft sealing sheet, application models are Santana, Pastor, Audi, small red flag.
The biggest characteristics of the 3 and third generation of fiber micro bubble rubber cork material transmission shaft seal is based on the second generation, the rubber to micro foam rubber, so it has greater compressibility, ability to make up for the dual rough surface defect was greatly improved and the practical value of a sealing sheet high. The introduction of new domestic high-end cars and Japanese cars are gradually fitting the drive shaft sealing sheet.
| 序号 |
指标名称 |
单位 |
指标值 |
实际可达指标 |
| 1 |
压缩率 |
% |
≥45 |
46.5 |
| 2 |
永久变形 |
% |
≤35 |
27.8 |
| 3 |
耐热密封性 |
°C |
160 |
160 |
| 4 |
压缩应力 |
0.1mm |
Mpa |
≥1 |
4.31 |
| 0.7mm |
Mpa |
≤30 |
26.5 |
| 耐油性（150°C*5hr ASTM2#油） |
| 5 |
厚度变化率 |
% |
≤10 |
5.7 |
| 重量变化率 |
% |
≤70 |
13.8 |
| 热老化变形（100°C±3°C*60hr) |
| 6 |
热变形 |
% |
＜35 |
32.7 |
纤维微泡橡胶软木传动轴密封片必须符合美国M6008技术条件，并且重申重金属的含量必须符合欧盟标准，测试标准则允许采用中国标准，其主要技术指标如下：
| 序号 |
指标名称 |
单位 |
指标值 |
实际可达标准 |
测试标准 |
| 1 |
压缩性 |
% |
30~50 |
41.6 |
GB/T20671.2--2006 |
| 2 |
回弹率 |
% |
≥75 |
88.2 |
GB/T20671.2--2006 |
| 3 |
拉伸强度 |
Mpa |
≥0.5 |
0.65 |
GB/T20671.2--2006 |
| 4 |
密度 |
G/cm³ |
0.5~0.6 |
0.57 |
GB/T533---2008 |
| 5 |
硬度 |
邵氏A |
30~50 |
46 |
GB/T533---2008 |
| 6 |
老化性能 |
硬度变化 |
% |
+15~0 |
10 |
120°C GB/T3512 |
| 7 |
硬度变化 |
% |
+15~0 |
12 |
135°C GB/T3512 |
| 8 |
铅（pb) |
PPM |
≤900 |
59 |
ISO6101-2,EDS-T-7804.EDS-A-0101 |
| 9 |
镉（cd) |
PPM |
≤90 |
36 |
ISO6101-2,EDS-T-7804.EDS-A-0101 |
| 10 |
六价铬（cr6) |
PPM |
≤900 |
0 |
ISO6101-2,EDS-T-7804.EDS-A-0101 |
| 11 |
汞（Hg) |
PPM |
≤900 |
0 |
ISO6101-2,EDS-T-7804.EDS-A-0101 |
