Moreover, white silica-filled compounds, at least if used in AEM or ACM compounds, suffer from worse compression set
due to certain interactions of the curing site with the hydroxyl groups on the surface of the silica.
Material failure: Causes are compression set
, thermal and chemical degradation, incorrect hardness, or wrong choice of elastomer.
A low hardness thermoplastic elastomer is said to exhibit better performance than that of thermoplastic vulcanizate widely used in weatherseals by providing higher tear strength, lower compression set
and cost benefits.
While standard compression-set tests of Septon V9000 yield results equivalent to standard olefinic TPVs, long-term (1000-hr) compression set
is said to be much better for the new SBCs.
Molded parts made from this silicone are said to be resistant to heat and coolant, and exhibit low compression set
even under permanent stress.
These TPVs improve compression set
, oil resistance, and adhesion of conventional TPVs and are aimed at overmolded high-performance grips, seals, and diaphragms.
at low temperature measures the ability of a robber material to recover after being compressed at a sub-zero temperature.
The materials have around 20% compression set
after 22 hr at 120 C vs.
These compounds are said to be characterized by high tensile and tear strength, good compression set
and good heat aging properties.
It does not scorch, is non-staining, and is well suited to low-density foams where low compression set
DOTG does a good job of speeding up the cure rate and it has an added benefit in that it significantly improves the compression set
According to Novamont, vertical compression set
of the foam is 10%, compressive creep is less than 15%.