Polypropylene material properties

Item Test method ASTM Unit PP
Specific gravity D792 - 0.91
Water absorption rate D570 <0.01
Thermal deformation temperature(1.82MPa) D648 65
Thermal expansion coefficient D696 ×10-5/℃ 10
Thermal conductivity C177 - 2.8
Flammability UL94 - -
Continuous use temperature UL746B 65
Tensile strength D638 MPa 32
Elongation D638 >500
Tensile modulus of elasticity D638 MPa -
Bending strength D790 MPa -
Bending modulus of elasticity D790 MPa 1660
Impact strength(With notch) D256 J/m 37
Impact strength(Without notch) D256 J/m -
Rockwell hardness D785 M scale -
Volume resistivity D257 Ω・cm/Ω >1×1016
Dielectric breakdown voltage D149 kV/mm 31
Permittivity(1KHz) D150 - -
Permittivity(1MHz) D150 - 2-2.3
Dissipation factor(1KHz) D150 - -
Dissipation factor(1MHz) D150 - 0.0002
Arc resistance D495 secs. -

The numeric values above are typical values. They are not standard values.

Chemical name PP
Ammonia (anhydrous)
Caustic soda10%
Hydrochloric acid 10%
Sulfuric acid 10%
Nitric acid 10%
Acetic acid 10%
Acetone
Glycerin
Ethyl acetate
Carbon tetrachloride
Toluene
Hexane
Asphalt
Gasoline
Salt water
Table salt(Industrial salt)
Soapy water
Petroleum
Water
Tar
25% chromic acid ×
Cresol

Evaluation:
◎ Use permitted
○ Use permitted but initial strength is reduced
△ No durability
× Use not permitted
Note: For actual use, always conduct chemical and strength testing since differences occur due to usage conditions.