There are three types
of P.V.C materials: soft P.V.C, hard P.V.C, and
C.P.V.C. These three materials have a common characteristic,
which is if the heater temperature sets too high,
it will generate the HCI corrosive gas and toxic
vinyl chloride monomer that hurts human body.
Since HCI rusts steel seriously, it is important
to control the heater temperature not getting
too high during production to prevent harm. At
the end of production, one must clean properly
using common plastic material to prevent barrel
and screw rust. It is even better to decrease
the heater temperature while still producing prior
to shutting down the machine. Then, using a dedicate
P.V.C machine is suggested so one can prevent
damaging every machine barrels and screws.
When injecting the hard P.V.C and C.P.V.C material,
it must use dedicated custom made special screw
and barrel, and the compression ratio must not
be too high to prevent overheating the heater.
For the better result, installing a fan by the
barrel is a good solution.
Since P.V.C material is good at chemical and
weather resistance, plus it is firm, not easy
to burn, never rot, and antirust, it has been
used a lot for construction pipes such as electric,
water, two joint, and three joint pipes. |