DMC premixes

DMC premixes

Polyester DMC premix (thermosetting polyester molding material) is a semi-finished product for manufacturing articles out of disperse-filled polymer composites. The product is a doughlike mixture of liquid thermoreactive binder, chopped fibre, mineral disperse filler, and various additives. Details made of DMC premixes are used at temperatures ranging from -60°С to +130°С.

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Physical and mechanical properties

 

Property Unit DМС-10-РКМ DМС-18-Т DМС-20-РМ DМС-20-ОРМТ
Ultimate flexural strength MPa (kgf/cm2)

≥60

(600)

≥80

(800)

≥100 (1000) ≥100 (1000)
Impact viscosity kJ/m2 ≥10 ≥20 ≥30 ≥30
Dielectric strength at 50 Hz kVeff/mm ≥12 ≥12 ≥12 ≥12
Water absorption at 23±2°С through out 24±1 hrs % ≤0.5 ≤0.5 ≤0.5 ≤0.5
Linear shrinkage % ≤0.08 - ≤0,08 ≤0,08
Density г/см3 ≥1.60 ≥1.70 ≥1.71 ≥1.74
Funginertness point - ≤2 ≤2 ≤2
Martensyield temperature °С ≥155 ≥155 ≥200 ≥200
Arc resistance с ≥200 ≥200 ≥200 ≥200
Tracking resistance V ≥500 ≥500 ≥500 ≥500
Specific electrical resistivity
volume Ohm*cm ≥1*1014 ≥5*1013 ≥1*1014 ≥1*1014
surface Ohm ≥1*1014 ≥5*1013 ≥1*1014 ≥1*1014
Reprocessing mode
Pressing temperature °С 140-155 140-155 130-140 140-155
Compression molding pressure MPa 3-5 6-10 6-10 6-10
Hold time at compression molding min/mm 1.0 1-2 1,0 1,0

 

Physical and mechanical properties (continuation)

 

Property Unit DМС-20-ОРМА DМС-20-ОХ DМС-30-В DМС-30-ОРМТ
Ultimate flexural strength MPa (kgf/cm2)

≥80

(800)

≥80

(800)

≥130 (1300) ≥110 (1100)
Impact viscosity kJ/m2 ≥20 ≥20 ≥35 ≥30
Dielectric strength at 50 Hz kVeff/mm ≥2.5 ≥12 ≥12 ≥12
Water absorption at 23±2°С throughout 24±1 hrs % ≤0.5 ≤0.5 ≤0,5 ≤0,5
Linear shrinkage % ≤0.08 ≤0,3 ≤0,08 ≤0.08
Density g/cm3 ≥1.78 ≥1.79 ≥1.74 ≥1.84
Funginertness point ≤2 ≤2 ≤2 ≤2
Martensyield temperature °С ≥155 ≥200 ≥200 ≥180
Arc resistance с - ≥200 ≥200 ≥200
Tracking resistance V - ≥500 ≥500 ≥500
Specific electrical resistivity
volume Ohm*cm ≤1*109 - ≥1*1013 ≥1*1014
surface Ohm ≤1*109 - ≥1*1013 ≥1*1014
Reprocessing mode
Pressing temperature °С 140-155 160-170 140-155 140-155
Compression molding pressure MPa 6-10 8-15 6-10 8-15
Hold time at compression molding min/mm 1.0 1.0 1.0 1.0

 

Manufacture of the material with other physical and mechanical properties is accepted upon agreeing about with a consumer.