Vydyne® 21SPM

About
Vydyne 21SPM is a general-purpose PA66 resin. Available in natural, it is designed principally for injection-molding fabrication. This grade offers a well-balanced combination of engineering properties characterized by high strength; rigidity; good toughness; high melt point; good surface lubricity; abrasion resistance and resistance to many chemicals, machine and motor oils, solvents and gasoline. Vydyne 21SPM resin permits production of molded parts with good initial color plus good property and color retention when using regrind. This resin is recognized by Underwriters Laboratories and conforms to the requirements of many industrial, federal and military specifications for premium-quality, general-purpose PA66 resins. Vydyne 21SPM resin is internally and externally lubricated for improved machine feed and exceptional mold release. It is intended for use in high-productivity applications. In many applications, the molding cycle can be reduced because parts may be removed from the cavity at higher temperatures. In difficult molds where parts have a tendency to stick in the cavity, Vydyne 21SPM can reduce or eliminate the need for mold release sprays. Critical molded part dimensions should be checked against specifications before implementing shorter molding cycles on a routine production basis.

Product Description
SupplierAscend
GenericPA66
Material StatusCommercial: Active
FeaturesGood Rigidity,Good flexibility,Quick molding cycle,Good stripping performance,Lubricating,Good wear resistance,Grease resistance,Solvent resistance,Gasoline resistance
AvailabilitysNorth America,Asia Pacific,Europe
Process MethodsInjection Molding

Technical Data
PHYSICALNominal valueUnitTest method
Density1.14g/cm³
Shrinkage rate
TD:23℃,2.0 mm2.0%
TD:23℃,2.0 mm2.0%
Water absorption rate
23℃,24hr1.2%
Equilibrium, 23 ℃, 50% RH2.4%
Outdoor applicability (all)f2 

MECHANICALNominal valueUnitTest method
Tensile modulus
23℃3300MPa
Tensile stress
Yield, 23 ° C88.0MPa
Fracture, 23 ° C60.0MPa
Tensile strain
Yield, 23 ℃5.0%
Nominal tensile fracture strain (23 ° C)20%
Bending modulus
23℃3300MPa
bending strength
23℃105MPa
Poisson’s ratio0.40 

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength
-30℃5.0kJ/m²
23℃6.0kJ/m²
Charpy Unnotch Impact strength
-30℃无断裂 
23℃无断裂 
Impact strength of cantilever beam notch
-30℃5.0kJ/m²
23℃6.0kJ/m²

THERMALNominal valueUnitTest method
Hot deformation temperature
0.45 MPa, unannealed210
1.8 MPa, unannealed72.0
Melting temperature260
Linear coefficient of thermal expansion
Flow: 23~55 ° C, 2.00 mm1.0E-41/℃
TD:23~55℃,2.00 mm1.0E-41/℃
RTI Elec
0.40 mm130°C
0.71 mm130°C
1.5 mm130°C
3.0 mm130°C
RTI Imp
0.40 mm75.0°C
0.71 mm75.0°C
1.5 mm75.0°C
3.0 mm75.0°C
RTI
0.40 mm75.0°C
0.71 mm85.0°C
1.5 mm85.0°C
3.0 mm85.0°C

Electrical performanceNominal valueUnitTest method
Volume resistivity
0.75 mm1.0E+13ohms·cm
Dielectric strength
1 mm26kV/mm
Arc resistance
3.00 mmPLC 5 
Compared to the leakage tracing index
3.00 mm600V
High Arc Burning Index (HAI)
0.40 mmPLC 1 
0.71 mmPLC 0 
1.5 mmPLC 0 
3.0 mmPLC 0 
High voltage arc marking rate (HVTR)PLC 0 
Hot wire ignition (HWI)
0.40 mmPLC 4 
0.71 mmPLC 4 
1.5 mmPLC 3 
3.0 mmPLC 2 

FLAME CHARACTERISTICSNominal valueUnitTest method
Flame retardant level
0.40 mmV-2 
0.71 mmV-2 
1.50 mmV-2 
3.00 mmV-2 
Glowing wire flammability index
0.40 mm960
0.71 mm960
1.5 mm960
3.0 mm960
Hot filament ignition temperature
0.40 mm825°C
0.71 mm850°C
1.5 mm850°C
3.0 mm850°C
Extreme oxygen index26%

Process Conditions
InjectionNominal valueUnitTest method
drying temperature< 70°C
Drying time1.0 to 3.0hr
Suggested maximum proportion of recycled materials50%
Temperature at the rear of the barrel260 to 280°C
Temperature in the middle of the barrel270 to 285°C
Front temperature of material barrel280 to 290°C
Nozzle temperature280 to 300°C
Processing (melt) temperature285 to 300°C
Mold temperature65 to 95°C

Notes
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