聚酰胺聚酰亚�?球体, PAI, 3.18mm 直径

材料 >> 聚合物材斘�/div>

品牌: Goodfellow
产地: 英国
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产品介绍

产品参数

Diameter[直径]	3.18mm
Grade[等级]	Torlon? 4203L
Quantity[数量]	20 Piece - 200 Piece
Sphericity[球面]	25.4μm
Type[类型]	Precision Sphere
Physical Properties(物理性质)
Density ( g cm?? )	1.420 - 1.460
Flammability	V-0
Limiting oxygen index ( % )	44 - 45
Radiation resistance	Good
Resistance to Ultra-violet	Good
Water absorption - equilibrium ( % )	3.00 - 4.00
Water absorption - over 24 hours ( % )	0.300
Chemical Resistance(耐化学�?
Acids - concentrated	Fair-Poor
Acids - dilute	Fair
Alcohols	Good-Poor
Alkalis	Poor
Aromatic hydrocarbons	Good
Greases and Oils	Good
Halogenated Hydrocarbons	Good-Poor
Halogens	Good-Poor
Ketones	Good
Mechanical Properties(机械性能)
Elongation at break ( % )	7.0 -15.0
Hardness - Rockwell	E72-86
Izod impact strength ( J m?? )	60.0 - 140.0 - Notched
Poisson's ratio	0.380
Tensile modulus ( GPa )	4.50 - 6.80
Tensile strength ( MPa )	110.00 - 190.00
Thermal Properties(热性能)
Coefficient of thermal expansion ( x10?? K?? )	25.000 - 31.000
Heat-deflection temperature - 1.8MPa ( C )	278.0 - 9.0
Lower working temperature ( C )	<= -200
Specific heat ( J K?? kg?? )	1000.0
Thermal conductivity ( W m?? K?? )	0.26 - 0.54 @23ℂ�/td>
Upper working temperature ( C )	200 - 260
Electrical Properties(电气特�?
Dielectric constant @1MHz	4 - 5
Dielectric strength ( kV mm?? )	23.0 at 1mm
Dissipation factor @ 1MHz	0.0300 - 0.0420
Surface resistivity ( Ohm/sq )	8-50x10??
Volume resistivity ( Ohmcm )	0.08-2x10??
Pultrusion(挤拉成型)
Compressive strength ( MPa )	170 -220

其他参数

公差

直径		��5%