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.