Characteristics about plastic materials of CNC prototype
Time:2015-04-17 15:29 source:
Leecheer Author: Leecheer Click:
Characteristics about plastic materials of CNC prototype
In the CNC prototype industry, the CNC prototypes are made by plastic materials
including general materials ABS, PC, PMMA and PA. POM. The characteristic
of several general plastic materials are introduced as the following.
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
includes 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.
Keywords: CNC prototype,Characteristics,plastic materials ,CNC