Extrusion International 3-2025

29 Extrusion International 3/2025 New Cam-Lock Design Introduced Guill Tool, the global leader in ex - trusion tooling, recently announced the availability of its Cam- Lock de- sign on various crossheads. The Cam-Lock is the same as sup- plied on the Bullet and will be sup- plied on additional heads, where applicable. It allows quick and easy assembly and disassembly of the crosshead and eliminates the socket head caps screws. By removing and replacing the internals, a different profile can be extruded in minutes rather than hours. Since the cam lock resets the internals in the right configuration every time, there's far less chance of error, compared to the as- sembly and misalignment issues with socket set screws. The Cam- Lock offers sev- eral features such as: it takes only ½ turn to remove and in- stall the deflec - tor tip and no fastening hardware is required. Additional features include fast tool changes (threaded retain - ing ring for the die and thread- ed tip retainer), dies remove from the front and tips from the back, tooling retainers for gum space adjustment, vacuum connections, simplified cleaning and reduced downtime and operating costs. For more information: Tom Baldock, Sales Manager, Extrusion Guill Tool & Engineering tbaldock@guill.com, www.guill.com Halogen-Free Flame Retardant As an alternative to chlorine- or bromine-based flame retardants, Tosaf's portfolio now also includes highly active, halogen-free (HFFR) grades, which enable more sustain- able solutions to fulfil customer re - quirements and legal specifications. FR8719PP is specifically designed to meet the flame-retardant require - ments of polypropylene in injection moulding and extrusion applications. Without compromising on effi - ciency and even at very low concen- trations, FR8719PP helps to prevent the spread of fire and meet stringent fire safety criteria in applications such as construction, automotive and ship- ping packaging without compromis- ing the properties of the material. PP pipes, for example, retain their high impact strength, dimensional stabil- ity and chemical resistance without restriction after switching to halogen- free flame retardants. In contrast to many halogen-based flame retar - dants, FR8719 shows no long-term migration of the active ingredients, and corresponding PP products offer significantly higher UV resistance. The good dispersion of FR8719PP in injection-moulded and extruded PP-based products is one reason for the very high efficiency of this HF flame retardant. This not only en - ables a relatively low dosage and therefore the mechanical properties to be largely retained, but also uni- form flame retardancy across the entire product. In addition, the low potential for dye build-up (DBU) of - fers a considerable processing ad- vantage over other halogen-free so- lutions available on the market. The choice of flame retardant de - pends largely on which UL94 classi - fication is to be achieved. For exam - ple, to fulfil the requirements of class V-2, flame retardants in low concen - trations are sufficient to eliminate the free radicals formed by the heat of combustion and thus suppress the fire. Only in higher concentrations do they also prevent burning drop- lets, as required by the UL94 V-0 clas - sification. Tosaf has developed an extensive portfolio of HFFR grades that differ from each other in their flame-re - tardant systems and fulfil individual priorities to achieve the optimum balance between effect and concen- tration. Their dosage is between 3 % and 10%and depends on the desired classification, the type and melt flow index (MFI) of the PP, the thickness of the part and the simultaneous pres- ence of other additives. In contrast, intumescent halogen-free flame re - tardants require a dose of over 20 % to achieve similar performance. Inaddition todevelopingnewHFFR grades that do not harmhealth or the environment, Tosaf also fulfils the continuing need for halogen-based products. They combine high ther - mal stability with high performance to fulfil stringent fire standards with - out compromising the properties of the product. For example, the bro - minated flame retardant FR6413PE is suitable for all types of PP pipes, while chlorinated cost-effective flame re - tardants such as FR0049 can be used for both PE and PP. To meet the growing demand for flame retardants, Tosaf has invested in a state-of-the-art production facil- ity. A high-tech laboratory equipped with a cone calorimeter for complete combustion analysis, among other things, is available for testing ac- cording to a variety of fire standards. In addition, the company has set up pilot lines that simulate real produc- tion conditions and make it possible to taylor flame retardant additives for specific applications. Tosaf Compounds Ltd. www.tosaf.com Extruded pipes made of halogen-free flame-retardant polypropylene, which are used, for example, for guiding electrical cables, protecting optical fibres or for supplying and discharging media, prevent the spread of fires (© shutterstock/Flegere)