<1>Polypropylene(PP)
.The polypropylene is polymerized by the propylene under the
catalyst's function .Its opposite density is 0.9.It’s the
most light of the hot plastics, and it is not poisonous, tasteless,
bear the heat very good. Its mechanics function is higher,
and broadly use the food packing, medicine packing, electric
accessories, the spare parts of machine and daily necessity
etc..
<2>The polypropylene's physics function:
| Property |
Unit |
Polyoxymethylene |
| Density |
g/cm |
0.90-0.915 |
| Moisture Ratio |
% |
<0.01 |
| Tensile |
MPa |
33.03-41.36 |
| Elongation ratio |
% |
200-700 |
| Bending strength |
MPa |
41.36-55.08 |
| Compression strength |
MPa |
|
| Impact |
KJ/m |
1.07-4.3 |
| Hardness |
( RH) |
(R85-110) |
| Specific heat volume |
J/Kg.k |
2009.66 |
| Temperaure of thermal deformation C |
0.45MPa |
99-116 |
Volume resistivity
( wetness50%23C)
|
n.cm |
6.5-10 |
| Dielectric Strength(3.2mm) |
Kv/mm |
19.7-26.0 |
| Resistant arc characteristic |
S |
185 |
| Liner expansion coefficient |
10-5/ºC |
6-8.5 |
| Sunlight influence |
|
Black resistance |
| Strong-acid influence |
|
Resistance |
| Alkali influence |
|
Resistance |
| Organic solvent |
|
80ºC<80ºC |
|
