ABS: ABS is a kind of new material in CNC prototype industry, whose name
is acrylonitrile, butadiene styrenics copolymers, which is the maximum production
and the most common used polymer. It unify the properties of PS,SAN,BS, which
is of the good mechanical property of tough, hard and firm. Its main characteristic
ncludes excellent impact strength, good stability of size, dyeability, good molding
processing and machining, good mechanical strength, high-stiffness, low moisture
uptake, good corrosion resistance, simple connection, avirulent insipidity, excellent
chemical properties and electrical insulation performance. In the high temperature,
ABS endure and isn’t out of shape, in the low temperature, it is of high impact toughness.
It is also a tough , not easy to be scratched material.
Operating temperature : from-50 degree centigrade to + 70 degree centigrade.
PC: The major components of PC is polycarbonate, which is a high quality material
made by CO-EXTRUSION. Its surface covers absorbent of high concentrations of
ultraviolet with long resistance and fast colour.
Its major characteristics :
(1)Transparency: The transmittance of PC reach 89%, which can be compared with glass.
The UV layer prototype wouldn’t produce yellowing , atomization, poor transmittance under sun.
Ten years later, transparency only runs off 6%, the PVC runs off 15%--20%, fiberglass runs off 12%-20%.
(2)Resistance: The impact strength is 250-300 times of common glass, 2-20 times of tempered glass.
Ultraviolet-proof : One side of PC prototype plate with UV proof and another is of condensation- resistance.
PMMA: Its English name is acrylic, whose chemical name is polymethylmethacrylate.
It is an important thermoplastic plastic, which is of good transparency, chemical stability
and weather resistance. It is also easy to paint, to process.
Its major characteristics :
(1)Its transparency likes crystal and light transmittance higher than 92%.
(2)PMMA is of excellent weather resistance, higher surface hardness and lustrous surface,
and good high temperature performance.
(3)PMMA have good machinability. It can not only adopt thermal forming, but also machining.
(4)The abrasive resistance of PMMA is closed to aluminium material.
(5)PMMA have good printability and sprayability, which can adopt suitable printing and painting.
(6)Flame resistance: It belong to inflammable material but non hypergol.
