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VMX5000 Series Pre-Compounds for Improved Heat Resistance
For demanding applications requiring high heat resistance, the VMX5000 series of Vamac庐 pre-compounds offer superior performance.
 
Until the introduction of the VMX5000 series, AEM compounds relied on fillers like carbon black or silica to provide strength and stiffness for a finished article.  These fillers, however, accelerate oxidative degradation.  VMX5000 series pre-compounds eliminate this problem by utilizing a novel filler system that actively extends the life of AEM articles exposed to hot air.  As a result, finished parts based on VMX5000 series pre-compounds last up to three times longer at any given temperature compared to AEM compounds containing conventional fillers.  Compounds based on the VMX5000 series are also lighter weight, with up to 15% lower specific gravity.
 
The improved heat aging performance of VMX5000 series pre-compounds benefits automotive applications such as turbocharger hose and molded air ducts, with specific advantages for seals and gaskets.  Compounds made with VMX5000 grades exhibit significantly improved compressive stress relaxation properties in air, as well as in long term compression set.
 
While VMX5000 series pre-compounds may be extended with AEM elastomer, plasticizer or small amounts of conventional filler like carbon black, in some cases no additional filler may be required.  VMX5000 compounds also provide a route to bright colored finished articles having superior physical properties and heat aging resistance compared to mineral filled AEM compounds.
 
VMX5000 series products are available in bale form, and the natural color is opaque creamy white to light pink.  Bales are packaged in 23kg units with a blue strippable wrap in individual boxes.  The strippable wrap must be completely removed prior to using the product.  A full pallet will hold thirty individual boxes with a net weight of 690kg.
 
Improved Heat Resistance
 
VMX5000 series pre-compounds offer significantly improved heat resistance over conventional carbon black filled AEM or HT-ACM.  Figure 1 shows AEM temperature rating based on three industry-accepted criteria: less than 50% loss in tensile strength and elongation, and less than 15-point change in Shore A hardness.