MINERAL FILLERS | MATERIALS
pound, processors are increasingly evaluating total cost of goods per finished part,” said Sheftel. He noted that NaturFil’s lower density (1.30 g/cm³ vs 2.7 g/cm³ for calcium carbonate) translates to cost-per-part savings. Lignetics is headquartered in Colorado, US, and has 30 production sites in North America. NaturFil is being used in products in North America and Europe. “Early adopters—automotive lightweighting programs, rigid container manufacturers, and biopolymer compounders—are running trials and bringing products to market,” said Sheftel. “De- mand is expanding beyond packaging into durable goods; we have active trials and customers in furniture, building products, retail consumer goods, and 3D printing materials.”
Mineral flame retardants Another use for mineral fillers is in flame retardant (FR) formulations. High levels of mineral-based FRs, such as aluminum trihydrate (ATH) and magnesium hydroxide (MDH), are used in halogen-free flame retardant (HFFR) formulations. One challenge is that the very high levels of minerals needed can increase weight and reduce processability and properties. Synergists, including some that are mineral based, can help reduce FR filler levels to maintain fire resistance characteristics and improve processability and properties. New from Elementis is Charguard 2010, which is
an organically modified organoclay that can be used as a synergist in halogen-free flame-retardant thermoplastic compounds to lower ATH or MDH levels. The lamellar silicate structure is a gas barrier that reduces heat release rate. The material also
increases char formation efficiency and inhibits dripping, the company said. Magris Talc offers patented high-aspect ratio
talcs as extenders for HFFR formulations, for use with FRs such as ATH, MDH, or intumescent FRs such as phosphinates. The company reported commercial use in wire and cable jacketing formulations and in glass-filled polyolefin formula- tions, such as those targeting conventional engi- neering thermoplastic applications. Previous studies showed that, in intumescent FR
formulations in glass-filled PA6, Magris Talc’s Hyperplate talc could replace 10% of the glass fibre and reduce the level of organic phosphonate-based FR while maintaining FR performance. Another study showed that talc could partly replace MDH in EVA compounds. A study completed this year using Hyperplate talc with an ultrafine precipitated ATH in a thermoset (Neoprene W) demonstrated that up to 50% of the ATH could be replaced while maintain- ing UL V-0 performance, the company said. Flame retardants will be discussed in more detail in the December issue of Compounding World.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.omya.com �
https://renovainfo.com �
www.imifabi.com �
www.elementis.com �
www.mondominerals.com �
www.imerys.com �
www.quarzwerke.com �
https://okeanos.global �
https://lignetics.com �
https://magristalc.com
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