Lishi International
Engineering & Manufacturing
With experienced engineers, LISHI is good at rubber and plastic products research and development.
APPLICATION ANALYSIS
According to the prints, installation procedures and environment, analysis the material, structure and manufacturing processes.
MATERIAL SELECTION
Rubbers: Nitrile(NBR), Polyacrylate(ACM), Fluoroelastomer(FKM), Silicone(VMQ), Ethylene Propylene Diene Monomer(EPDM), HNBR, Teflon(PTFE), etc.
Plastics: Polycarbonate(PC), Polyamide(Nylon, PA), Polyacetal, Polyoxy Methylene(POM), Polyphenylene Oxide(PPO), PET, PBT, Polyphenylene Sulfide(PPS), etc.
BASIC POLYMERS |
NITRILE |
POLYACRYLATE |
FLUOROELASTOMER |
SILICONE |
TEFLON |
ETHYLENE ACRYLIC |
SUMP OIL TEMPERATURE RANGE |
-40°F~230°F -40°C~110°C |
-40° F~275° F -40°C~135°C |
-40°F~302° F -40°C~150°C |
-94°F~302° F -70°C~150°C |
-112°F~392°
F -80°C~200°C |
-40°F~302° F -40°C~150°C |
Oil Resistance |
Very good |
Very good |
Very good |
Fair |
Very good |
Fair |
Acid Resistance |
Good |
Fair |
Fair |
Fair |
Very good |
Good |
Alkali Resistance |
Good |
Poor |
Fair |
Poor |
Very good |
Very good |
Heat Resistance |
Good |
Very good |
Very good |
Very good |
Very good |
Good |
Cold Resistance |
Good |
Very good |
Fair |
Very good |
Very good |
Good |
Water Resistance |
Good |
Fair |
Good |
Good |
Very good |
Good |
Sunlight Resistance |
Good |
Very good |
Very good |
Very good |
Very good |
Fair |
Oxidation Resistance |
Good |
Poor |
Good |
Very good |
Very good |
Very good |
Wear Resistance |
Very good |
Very good |
Very good |
Good |
Fair |
Fair |
Ozone Resistance |
Good |
Very good |
Very good |
Very good |
Very good |
Very good |
Note: Water resistance includes steam. No elastomeric material is ideally compatible with water as it is very poor lubricant.
PROPERTY |
SPECIFIC GRAVITY |
TENSILE STRENGTH |
TENSILE MODULUS OF
ELASTICITY |
TENSILE ELONGATION |
FLEXURAL STRENGTH |
FLEXURAL MODULUS OF
ELASTICITY |
HARDNESS |
IZOD IMPACT |
UNITS |
psi |
psi |
% |
psi |
psi |
scale
as noted |
ft-lbs /in |
|
ASTM TEST |
D-792 |
D-638 |
D-638 |
D-638 |
D-790 |
D-790 |
D-785 |
D-256 |
ABS |
1.04 |
4,100 |
294,000 |
32 |
9,100 |
304,000 |
R102 |
7.7 |
HDPE |
0.96 |
4,000 |
- |
600 |
- |
200,000 |
- |
- |
LDPE |
0.92 |
1,400 |
- |
500 |
- |
30,000 |
- |
no break |
NYLON |
1.14 |
12,400 |
470,000 |
90 |
17,000 |
410,000 |
M80, R121 |
1.2 |
NYLON |
1.15 |
12,500 |
400,000 |
20-40 |
13,500 |
330,000 |
R118 |
0.8 |
PBT |
1.3 |
8,690 |
416,000 |
300 |
12,000 |
330,000 |
M72 |
1.5 |
PEEK |
1.32 |
14,000 |
490,000 |
60 |
24,600 |
590,000 |
M99, R126 |
1.6 |
PET |
1.38 |
11,500 |
400,000 |
70 |
15,000 |
400,000 |
R117 |
0.7 |
PP |
0.91 |
5,400 |
- |
- |
- |
225,000 |
R92 |
1.2 |
PP |
0.9 |
3,800 |
- |
- |
- |
215,000 |
R92 |
12.5 |
PPS |
1.35 |
12,500 |
480,000 |
4 |
21,000 |
600,000 |
M93 |
0.5 |
PTFE |
2.15 |
1,500-3,000 |
- |
100-200 |
- |
72,000 |
- |
3.5 |
SRUCTURE DESIGN
CAE, Prototype, 3D Printing
PROCESS OPTIMIZATION
Replace the metal parts, especially die-casting parts with
plastic parts. Reduce the part weight, cost and lead-time,
protect the environment.
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