PMMA BASED COMPOSITE LASERS IRRADIATED
Patent no20841-Egyptian Patent Office
HEBATALRAHMAN AHMED –EGYPT Hebatalrahman11@yahoo.com *Advantages of New Composite*
*High strength to weight ratio *High resistance to environment *Long life time *Easy machining and shaping * different shapes& colors *Replace metal parts *Laser irradiation improve properties without any change in chemical composition *اProperties of Composite Material* Hardness 80 BarcoulWear rate 3.8m/m Coefficient of friction 0.75Modulus of elasticity 1209N/mm2 chemical resistance less than 0.01 for continuous exposure Compressive strength 301.5N/mm2
*Summary* PMMA
(poly
acrylate)
methyl
metha
the
best
has
biocompatibility
so
that
it
is
suitable for medical applications, but it has a lot of disadvantages such
as
strength,
low
hardness,
low
high
shrinkage,
high
water absorption and low thermal conductivity. These disadvantages have already been overcome by making new composite material consists of PMMA as matrix and fiber glass as reinforcement which is cheap, abundant and effective to overcome the disadvantages. The fiber glass is used at different volume fractions and at length to
Final Products
Semi final Products
diameter ratio. The manufacturing quality parameters are indicated as temperature. Pressure, time of application of force and cooling rate. The new composite material is
irradiated
Argon lasers.
by
Nd-YAG
and/