MA
Maleic Anhydride
Machine Shot Capacity
Generally based on polystyrene. This is the maximum weight of plastic which can be displaced or injected by a single stroke
MBS
Methyacrylate-buadiene-styrene
MDPE
Medium-density polyethylene
Mechanical bond
A method of creating a molded part where the rubber is mechanically attached to an overmolded insert through the use of holes, depressions or projections on the insert
Melt Index
A measure in grams of plastic material that can be forced through an orifice of 0.0825 inches when subjected to a force of 2160 grams in 10 minutes at 190°C
Memory
Ability of an elastomeric material to return to its original size and shape after deformation
Metering Screw
An extrusion screw that has a shallow constant depth and pitch section usually over the last three or four flights
Metric Units
Milli
Centi
Deci
Meters
Liters
kilo
Deka
Grams
Hecto
Microhardness
A measurement of rubber hardness for specimen's below .25 inches (6.35mm) in thickness. Microhardness, like Shore A durometer, is also a measurement of indentation
Mismatch
Unequal O-ring cross-sectional radii caused by dimensional differences in the mold cavity
MMA
Methyl methacrylate monomer
|
|