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|Material:||POM||Fire Resistance:||UL 94V-2|
RAL9003 White Plastic Injection Molding Products , Round Base Washer Shim 5 X 50 mm
Round body base washer shim is made of POM plastic injection molded for application on household appliances . Base washer shim is a plate with holes that spread on , these holes are supporting fixing place to other objects so that base washer protect components are not be scratched .
One side of plastic injection molded base washer shim with socket holes which can be inserted into groove in object for fixing base washer .
Base washer plastic injection molded is made of POM that with good characteristics for household appliances
High mechanical strength
Tensile strength can be up 50.5MPa . close to metal properties . and only a tiny change on mechanical strength even working temperature has a large change .
The maximum specific stiffness for POM can be up to 2650MP
Good wear resistant
Wear resistant strength still keeps 35MPa or so even item is put 10 J variable load . it is best compared to items that with PA,ABS,HPVC,PS,PC
POM has good impact resistance but inferior to ABS and PC , Impact performance will be down 90% or so if there is breaking on or in product .
POM parts with F4 , C ,MoS2 ,PE and lubricant elements that improve self-lubricant performance .
Stability in dimensions
POM part with good tensile strength and hardness that not easy to be deformed and broken .
Resistant Organic solvent
POM parts are resistant for hydrocarbon ,alcohol ,ether ,aldehyde , gasoline ,lubricant and Weak Alkalis .
Small creep properties
Creep property rate is 2.3% or so in 20℃,21MPa,3000h . and nearly not be effected by temperature
POM items nearly not be effected by temperature and humidity on insulation . insulation is related with the thickness of items , eg when thickness is 0.127mm insulation is 82.7kV/mm,thickness is 1.88mmi insulation is 23.6kV/mm
Low water absorption
POM injection molded base washer shim parts are customized according to requests of fittings .
Outside diameter : 55 mm
Thickness : 1.5 mm
Normally , basics tolerances for POM injection molded base washer shim parts based on level MT 7, and unspecified tolerance based on ISO 2768M .
|Basic Sizes||Tolerance Level|
Normal sizes tolerances
Unspecified tolerance ISO 2768-M
|Water absorption %||2.5|
|Tensile strength MPa||70|
|Elongation at break %||40|
|Bending strength MPa||90|
|Modulus of elasticity for tension MPa||3160|
|modulus of elasticity for bending MPa||2880|
|Compressive strength MPa||127|
|Shearing strength MPa||67|
|Notched Impact Strength(J/m)||76|
|Heat distortion Temperature(1.82MPa)℃||110|
|Normal working temperature ℃||80|
|Working temperature arrange ℃||-40℃～90℃|
|Coefficient of linear expansion (×10K)||7.5|
|Heat conduction W/(m·K)||0.23|
|Specific volume resistance Ω·cm||10|
|Specific inductive capacity(10Hz)||3.8|
|Dielectric loss tangent (10Hz)||0.005|
Tips for use
POM injection molded base washer shim parts are easy to be cracked and pulverized outside long-term .
Don’t put POM injection molded base washer shim parts under temperature over 100℃
Don’t put POM injection molded base washer shim parts under circumstance with alkali and oxidant .