Vydyne® R228

About
Vydyne R228 is a 40% mineral-reinforced PA66 resin formulated for improved impact strength. Available in black, it is an injection-molding grade formulated to retain the inherent processing advantages of unreinforced PA66 while enhancing rigidity, strength and heat resistance. Vydyne R228 maintains the chemical resistance typical of PA66 to a wide variety of chemicals, gasoline, oils, greases and solvents. Vydyne R228 resin utilizes a unique mineral-reinforced PA66 system developed by Ascend Performance Materials to satisfy the market need for a high-rigidity thermoplastic as an alternative to certain metals. This mineral system provides two key features: (1) isotropic behavior-property development in molded parts is usually independent of flow direction. (2) a reduction in the tendency to develop sink marks in heavy cross sections such as molded-in bosses and ribs. While not sink-free, parts made from Vydyne R228 can often permit boss and rib design or wall cross section changes that would not be tolerable in other unreinforced thermoplastic materials. Thus Vydyne R228 resin offers more uniform molded part strength and performance, as well as wider latitude in part design. Vydyne R228 resin is a workhorse of Ascend Performance Materials’ full line of mineral-reinforced PA66 resins, providing the best overall balance of properties. Vydyne R228 is heat stabilized and designed to provide increased ductility and reduced melt viscosity vs. unreinforced materials.This ductility improvement results in tougher, more impact-resistant molded parts. The reduction in melt viscosity enhances overall ease of injection-molding, resulting in minor reductions in tensile strength, modulus and heat distortion temperature. Parts manufactured from Vydyne R228 have successfully withstood paint bake oven cycles without significant loss of either dimensional stability or part properties.&&

Product Description
SupplierAscend
GenericPA66
Material StatusCommercial: Active
FeaturesGood Rigidity,Good flexibility,High impact resistance,Ductility,High Heat Resistance,Grease resistance,Solvent resistance,Gasoline resistance,Heat Stabilized
AvailabilitysNorth America,Asia Pacific,Europe
Process MethodsInjection Molding

Technical Data
PHYSICALNominal valueUnitTest method
Density1.48g/cm³ISO 1183
Shrinkage rate ISO 294-4
TD:23℃,2.0 mm1.0%ISO 294-4
MD:23℃,2.0 mm1.1%ISO 294-4
Water absorption rate
Equilibrium, 23 ℃, 50% RH1.6%ISO 62
23℃,24hr1.1%ISO 62

MECHANICALNominal valueUnitTest method
Tensile modulus
23℃6900MPaISO 527-2
tensile strength
Yield, 23 ℃103MPaISO 527-2
Tensile strain
Fracture, 23 ℃6.0%ISO 527-2
Yield, 23 ℃1.5%ISO 527-2
Bending modulus
23℃6100MPaISO 178
bending strength
23℃124MPaISO 178
Poisson’s ratio0.40 ISO 527

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength ISO 179/1eA
-30℃6.0kJ/m²ISO 179/1eA
23℃7.0kJ/m²ISO 179/1eA
Charpy Unnotch Impact strength ISO 179/1eU
-30℃110kJ/m²ISO 179/1eU
23℃140kJ/m²ISO 179/1eU
Impact strength of cantilever beam notch ISO 180
-30℃7.0kJ/m²ISO 180
23℃9.0kJ/m²ISO 180

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed118ISO 75-2/A
0.45 MPa, unannealed222ISO 75-2/B
Melting temperature258ISO 11357-3
Linear coefficient of thermal expansion
TD:23~55℃,2 mm6.0E-41/℃ISO 11359-2
MD:23~55℃,2 mm6.3E-41/℃ISO 11359-2

Supplementary informationNominal valueUnitTest method
Automotive materials
thickness d = 1mm+ FMVSS 302

Process Conditions
injectionNominal valueUnitTest method
Drying temperature80°C
Drying time4.0hr
Proposed maximum recycled material ratio25%
Barrel rear temperature280 to 310°C
Barrel middle temperature280 to 310°C
Barrel front temperature280 to 310°C
Nozzle temperature280 to 310°C
Processing (melt) temperature285 to 305°C
Mold temperature65 to 95°C

Notes
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