QC/T 704-2004Test method for overall hardness of polyurethane foam coverings of automobile steering wheels (English PDF)
汽车转向盘聚氨酯泡沫包覆层整体硬度试验方法
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
February 10, 2004
Implementation date
August 1, 2004
Scope
QC/T 704-2004 is the English-translated version of 汽车转向盘聚氨酯泡沫包覆层整体硬度试验方法.
QC/T 704-2004 is the Chinese standard "Test method for overall hardness of polyurethane foam coverings of automobile steering wheels". Its scope clause reads: This standard specifies the method for testing hardness of auto steering-wheel with PU foam as the wrap layer material.
This standard is applicable to PU foam wrap layer materials for steering-wheels of passenger cars and commercial cars. Its clauses include term and definition; specimens.
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Document preview — QC/T 704-2004
National Standard of the People's Republic of China
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword i
- 1 Scope
- 2 Normative references
- 3 Term and definition
- 4 Specimens
- 5 Test apparatus
- 6 Test method
- 7 Expression of test result
- 8 Test report
1 Scope
This standard specifies the method for testing hardness of auto steering-wheel with PU foam as the wrap layer material.
This standard is applicable to PU foam wrap layer materials for steering-wheels of passenger cars and commercial cars.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 2918 Plastics - Standard atmospheres for conditioning and testing
GB/T 8170 Rules for rounding off of numerical values
3 Term and definition
For the purpose of this standard, the following term and definition apply.
3.1 shore L hardness
shore L hardness refers to the hardness expressed by pressing a press needle with a specified shape into a specimen under standard spring pressure and converting the pressed depth of the press needle into a hardness value
4 Specimens
Two steering-wheels. The surface of the specimens must be free of air holes, foreign matters and other defects, and the outer surface must be closed. The production time of specimens shall be at least 3 d.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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