PORTAFLAME® CA is produced from carefully selected, naturally occurring hydrated calcium borate. The standardised quality of PORTAFLAME® CA is guaranteed by means of an ISO 9001 certified quality management plan. The chemical composition of raw material and product is closely monitored and particle size kept within a narrow variation.

PORTAFLAME® CA micronized halogen-free flame retardant (HFFR) fillers are used as an effective synergist for other flame retardant fillers, such as ATH and magnesium hydroxide. The flame-retarding action of PORTAFLAME® CA is based mainly upon its high char forming and glazing/fluxing ability in combination with endothermic decomposition (heat-sink effect). In applications such as polyolefin-based wire & cable compounds, a significant reduction of the peak Rate of Heat Release, as measured by the oxygen depletion method, is achieved. Both the European standard EN 50399: "Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test" and the SBI (Single Burning Item) flame retardancy test, being a part of the European building regulations, measure the Rate of Heat Release as a very important parameter.

PORTAFLAME® CA is also an attractive alternative for synthetic Zinc borate.