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Kunststoffkugeln werden aus Standard- und Spezial-Polymerharzen in Größen von 1mm bis 180mm hergestellt.
Kunststoffkugeln sind bei manchen Anwendungen ein kostengünstiger Ersatz für Stahlkugeln. Sie werden in Aerosolsprühdosen, leichten Rückschlagventilen, medizinischen Diagnosegeräten, leichten Lagern, Schubladen und zahlreichen anderen Anwendungen eingesetzt.
Polyacetal (non filled material)
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Physical Properties for plastic balls
|
|
| Specific Gravity |
1.41-1.42 |
| Water absorption, 1/8" thick specimen, 24h saturation (%) |
0.20-0.40 |
| Dielectric strength, 1/8" thick specimen, short time (kV/mm) |
60-70 |
|
|
| Mechanical Properties for plastic balls |
|
| Tensile strength at break (MPa) |
2800-3600 |
| Elongation at break (%) |
25-75 |
| Tensile yield strength (Mpa) |
62-84 |
| Tensile modulus (MPa) |
2800-3600 |
| Compressive strength (rupture or yield) (MPa) |
124 (10%)
|
| Compressive modulus (MPa) |
4620 |
| Flexural strength (rupture or yield) (MPa) |
90-98 |
| Flexural modulus(MPa) |
2620-2960 |
lzod impact. (J/m).of notched
|
54-122 |
| Hardness Rockwell |
M78-M94 |
|
|
| Thermal properties for plastic balls |
|
| Coef. of linear thermal expansion (K-1) |
11 x 10-5
|
| Deflection temperature Flexural load oF @1.85MPa (°C) |
106-114 |
| @0.46MPa (°C) |
150-170 |
| Thermal conductivity Wm-1K-1 |
0.8-1.1 |
| Maximal temperature of use without strength (°C) |
90-110 |
Data are indicative and can not bind the responsability of Preciball.
Polyamide (PA 6.6)
|
| Physical Properties for plastic balls |
|
| Specific Gravity |
1.13-1.15 |
| Water absorption, 24h saturation (%) |
2.8 |
| Dielectric strength, short time (KV/mm) |
24 |
|
|
| Mechanical Properties for plastic balls |
|
| Tensile strength at break (MPa) |
85 |
| Tensile modulus (MPa) |
3450 |
| Elongation at break (%) |
45 |
| Flexural modulus(MPai) |
3200 |
| Shock impact (Charpy) KJ / m2 |
3 |
| Hardness Rockwell |
R120 |
|
|
| Thermal properties for plastic balls |
|
| Coef. of linear thermal expansion (K-1) |
8-9.5 x 10-5
|
| Deflection temperature Flexural load oF @1.8MPa (°C) |
70 |
| @0.45MPa (°C) |
245 |
| Maximal temperature of use without strength (°C) |
110 |
| Polyethylene High Density |
| Physical Properties for plastic balls |
|
| Specific Gravity |
0.941-0.965 |
| Dielectric strength, (KV/mm) |
150 |
|
|
| Mechanical Properties for plastic balls |
|
| Tensile strength at break (MPai) |
17-31 |
| Elongation at break (%) |
400-1000 |
| Tensile yield strength (MPa) |
27-28 |
| Flexural modulus(MPa) |
1250 |
Shock impact (Charpy) KJ/m2
|
4 |
| Hardness Shore |
D67 |
|
|
| Thermal properties |
|
Deflection temperature Flexural load oF @1.045MPa (°C)
|
95 |
| Polyamide (Nylon 66) |
| Physical Properties |
|
| Specific Gravity |
1.13-1.15 |
| Water absorption, 1/8" thick specimen, 24h saturation (%) |
1.0-1.3 |
| Dielectric strength, 1/8" thick specimen, short time (V/mil) |
600b |
|
|
| Mechanical Properties |
|
| Tensile strength at break (psi) |
12.000b 11.000c |
| Elongation at break (%) |
60b 300c |
| Tensile yield strength (psi) |
8000b 6500c |
| Compressive strength (rupture or yield) (psi) |
15.000b(yld.) |
| Flexural strength (rupture or yield) (psi) |
17.000b 6100c |
| Tensile modulus (103 psi) |
/ |
| Compressive modulus (103 psi) |
/ |
| Flexural modulus(103 psi) |
420b 185c |
| lzod impact. Ft-lb/.in.of notch (1/8" thick specimen) |
0.8-1.0b 2.1c |
| Hardness Rockwell/Shore |
R120b M83b |
|
|
| Thermal properties |
|
| Coef. of linear thermal expansion (106in./in/oC) |
80 |
| Deflection temperature Flexural load oF @264psi |
167b |
| @66psi |
474b |
| Thermal conductivity 10-cal.-cm/sec-cm2-oC |
5.8 |
Data are indicative and can not bind the responsability of Preciball.
| PTFE |
| Physical Properties for plastic balls |
|
| Specific Gravity |
2.14-2.20 |
| Dielectric strength, 1mm thick specimen (KV/mm) |
36 |
|
|
| Mechanical Properties for plastic balls |
|
| Elongation at break (%) |
300-400 |
| Compressive strength (MPa) |
7-8 |
| Tensile modulus (MPa) |
750 |
| Flexural modulus(MPa) |
600-1000 |
lzod impact.J/m of notched
|
350-500 |
Hardness Shore
|
D50-60 |
|
|
| Thermal properties |
|
| Coef. of linear thermal expansion (K-1) |
13 x 10-5
|
| Deflection temperature Flexural load oF @1.82MPa (°C) |
50-60 |
| @0.45MPa (°C) |
130-140 |
| Thermal conductivity W/m-1/K-1 |
0.25 |
| Friction coefficient |
0.05-0.08 |
Data are indicative and can not bind the responsability of Preciball.
Phenolic resin
|
| Physical Properties for plastic balls |
|
| Specific Gravity |
1.32-1.87 |
| Water absorption, 1/8" thick specimen, 24h saturation (%) |
0.1-0.6 |
|
|
| Mechanical Properties for plastic balls |
|
| Compressive strength (max stress) (MPa) |
43 |
| Compressive modulus(MPa) |
3900 |
| Shock impact (Charpy) (Kj/m2) |
10-15 |
| Hardness Rockwell |
H50-90 |
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| Thermal properties |
|
| Coef. of linear thermal expansion (K-1) |
7-12 10-5
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| Deflection temperature Flexural load oF @1.8MPa |
88 |
| @0.45MPa |
96
|
Data are indicative and can not bind the responsability of Preciball.
| GRADE |
|
0 |
I |
II |
III |
|
Inches |
mm |
Inches |
mm |
Inches |
mm |
Inches |
mm |
| Sphericity |
0.0005 |
0.0125 |
0.0005 |
0.0125 |
0.001 |
0.025 |
0.005 |
0.125 |
| Tolerance |
+/-0.0005 |
0.0125 |
+/-0.001 |
0.025 |
+/-0.002 |
0.050 |
+/-0.005 |
0.125 |
| Surface |
Polished |
Polished |
Unpolished |
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