Brake is one of the most important components in the vehicle. One type of brake
that widely used is brake-based composites. One of the manufacture of composite material is
resin. Cashew Nut Shell Liquid (CNSL) is a natural material which has chemical structure
similar to synthetic phenol so it can be an alternative as a resin. Brake pads manufacture using
CNSL as resin composites made to obtain the brake which is strong, wear-resistant, and
environmentally friendly. The composite made using powder metallurgy techniques by mixing
ingredients such as rubber, fibre glass, carbon, mineral sands and phenolic resin. Two formulas
were composed by varying the resin and iron mineral sands in 5 grams. Composites were
tested using Universal Testing Machine (UTM). The tensile strength result of those formulas
are 600 N and 900 N and the elongations are 1.98 mm and 2.59 mm respectively. Formula 2
has a better tensile strength due to the addition of more resin is 15%. Since the better
properties, formula 2 was derivated to 4 extended formulas and showed excellent pressure
strength reached 20.000 N. It indicates that the addition of the resin can improve the
mechanical properties of a composite
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Development of the composite-based brake pads will reduce the damage of train wheels and
sparks during braking continually, one way to do engineering materials using nature-based phenolic
resin. Cashew Nut Shell Liquid (CNSL) is an oil composed from a complex phenolic compounds with
long carbon chain branched and unsaturated [2]. Utilization of CNSL and its derivatives product in
various industries increasingly open, including pharmaceutical industry; insecticides; adhesives;
varnishes and paints, brake pads and clutch plate vehicles, laminating resin, and epoxy resin [3]. The
main components of CNSL composed by acidic compounds such as anacardic acid; cardanol; and
cardol, which is a nature phenolic compound that has many advantages when it compared with
synthetic from petroleum derivatives. CNSL is a renewable resource, where the availability of raw
material can be guaranteed, different from synthetic phenolic of petroleum derivatives which the
prices and existence depend on petroleum abundance. Indonesia had imported phenol in form phenol
and phenol resin as much as 53,640 tonnes/year, so that the potential of CNSL in Cashew Nut skin can
be explored properly, there will be foreign exchange savings due to a reduction in imports of phenol
with their natural phenol substitution of CNSL. The CNSL compounds and their derivatives are
environmental friendly products, so it chance to replace the phenolic resin as brake pads composite[4].
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