| http://www.w3.org/ns/prov#value | - It is available in pelletized masterbatches for PP, ABS, PS, PE, and other resins.A completely different foaming principle is embodied in PolyChem Alloy???s new PolyFoam Expancel MB, a polyolefin masterbatch of polymeric microspheres that contain a liquid hydrocarbon. (The spheres co
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