Kyowa Gomu can provide special rubber-formed products that
simultaneously combine different degrees of hardness by
forming different materials, such as high-hardness and low-hardness
rubber, using metal molds.
Since in such products the different materials are bonded
chemically, there is no exfoliation or shedding of material.
Also, since the process for making such integrated products
has already been established, we can provide such products
at lower cost.
At present, integrated two-layer products are employed
for synthetic resin-made spiral and corrugated pipe. Typical
examples of such products combine high weatherproof characteristics
as well as very high-hardness rubber on the outside with
anti-bacterial characteristics and low-hardness rubber that
features good water stopping characteristics on the inside.
We can provide ultra-high hardness sponge-formed products
that possess high hardness not in terms of sponge hardness
but in the hardness of the rubber component, in addition
to excellent sponge products featuring high precision in
terms of both dimensions and hardness.
Ultra-high hardness sponge-formed products have hardness
values of 90 or more as measured by a JIS-A hardness meter.
In addition, such products have specific gravities ranging
from approx. 0.40 to 0.65. Super-high hardness sponge is
a special material combining hardness and strength with
light weight.
High-precision sponge-formed products are products in which
hardness dispersion, a factor that is considered difficult
to control, is kept to a bare minimum. In comparison with
the ¡Þ5 tolerance considered severe by the standards
of the industry, our products boast a hardness dispersion
tolerance of just ¡Þ2.5. In the radio control industry,
where the attitude to hardness dispersion is severe, our
products enjoy a 70% market share in Japan.