Several Common Plastic Materials of CNC Plastic Prototype
Time:2015-02-12 11:05 source:
Leecheer Author: Leecheer Click:
Several Common Plastic Materials of Plastic Prototype
In the prototype industry, the plastic prototypes are made by plastic materials including common
materials plastic ABS, PC, PMMA and some not commonly used PA. POM. The characteristic of
several common plastic materials are introduced as the following.
ABS: ABS is a kind of new material in prototype industry. Its full 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 as following:
(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.
(3) Ultraviolet-proof : One side of PC prototype plate with UV proof and another is of
condensation- resistance.
(4) Light weight: its weight is only the half weight of glass. It reduce the cost of transportation,
unloading, installation and braced frame.
(5) Flame retardant : National standard GB50222—95 have confirmed that PC is first
fire-retardant, that is B1 level.
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 as following:
(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: Plastic Materials, CNC Plastic Prototype