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Manufacturing Method for Non-Crosslinked PP Foamed Sheet
As a manufacturing method for
foam products, chemical foaming method has been used, which
suppressing foaming in the
cylinder by maintaining high pressure by supplying resin compounded
with foaming agent and extruding at the exit of workstation. However, high
expended products can not be manufactured.
There
is also a physical foaming method that
infusing organic compounds such as butane,
pentane into the resin
in the extruder, and foaming by extruding
them at the worktable.
This method is possible to
obtain more expanded products because organic compounds have high chemical
affinity and solubility with resin. However, because of high inflammability and
explosiveness, its method is dangerous and requires
careful operation of the facility and demands high cost to secure high safety
using anti-explosive facility.
On account of this reason Pron-family gas and
inactivated gases such as CO2 and N2 due to the
issue of an ozone layer had been
used instead of such organic compounds, However, these kinds of gases have
less chemical affinity and solubility than those organic compounds, so it is
not likely to get evenly dispersed foam and its diameter comes larger than
normal.
The purpose of our business is
to manufacture foam products using improved technique on extruding chemical
foaming with high power, small diameter, and evenly-dispersed foam,
furthermore, excellent in appearance
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