ITEM                 Test Method       Unit      SPECIFICATION 

Bulk factor                GB8324                                       ≤3.0

Flowability                       Rashing                 (mm)               120-200

Specific density                  GB1033                                      ≤1.45

Flexural strength                 GB9341                 MPa                 ≥70

Notched impact strength           GB1043                 Kj/m²                       ≥1.5

Impact strength                  GB1043                 Kj/m²                       ≥6.0

Heat deflection temperature        GB1634                  ℃                  ≥140

Insulation resistance              GB10064                Ω                  ≥10e8

Dielectric strength (90℃)          GB1408                 MV/m                ≥3.5

Dielectric dissipation factor        GB1409                                       ≤0.1

 (tanδ)(1 MHz)                                            

Shrinkage                       JB/T6542                 %                  0.7-0.9

Water absorption                 GB1034                  mg                 ≤50

Flammability                     UL94                                        V-O

 

Remark: Flowability and shrinkage will be agreed between seller and buyer. The typical flow-curing behavior:

125℃ Torque at B: 6-7.5 Nm

169℃ Torque at B: 2-3.0 Nm

 

Conditions for injection molding:

Fixed mold temp ℃:165-175

Movable mold temp ℃:170-180

Front barrel temp ℃:90-100

Rear barrel temp ℃:70-80

Injection pressure (MPa):80-160

Keeping pressure (MPa):100-200

Back pressure: 60% of injection pressure

Keeping time (s/mm): 10-20