contract as the consumer uses it.” Arnitel Eco is made from 50% renewable

resources, based on rapeseed oil. It can deliver up to a 40% reduction in carbon footprint compared to traditional co-polyesters. EcoPaXX combines DSM’s propriety C4 technology with C10 building blocks derived from castor plants. The combination of the short C4 block and the long C10 block provides high mechanical properties of typical short chain polyamides, combined with lower moisture uptake and higher chemical resistance more typical of long chain polyamides. Safilo, a leading Italian global eyewear com-

pany, is the first to use Trogamid myCX eCO, a bio-based transparent polyamide optimised by producer Evonik Industries specifically for lenses. The polymer is produced partly from a bio-based monomer and entirely with renewable energy, says Evonik. Safilo will launch eyeglass lenses made of Trogamid myCX eCO in January 2022 with the BOSS Spring Summer 22 collection and gradually expand its use across its portfolio. “It was particularly important for us to offer Safilo a sustainable polyamide whose properties differ in no way from those of the Trogamid myCX they already use,” says Viviane Papa, responsible for Evonik’s high-performance polyamides granules and com- pounds business. The material offers transparency of more than 90%, excellent mechanical properties, stress crack resistance, and fracture strength. While there is a strong focus on increased sustainability within injection moulding through routes that include biopolymers, recycled materials, use of renewable energy sources, and lightweight- ing, minor components such as additives are often overlooked in pursuit of sustainability even though

Safilo’s new lenses use a transparent bio-polyamide

they can contribute significantly. So says Palsgaard, a producer of plant-based additives, which it says can help optimise the injection moulding process “and provide high-functional performance in challenging designs without compromising on food safety or end-of life recycling.” Palsgaard’s Einar polymer additives are derived

from animal-free and edible plant sources. In fact, they are sold as dual use plant-based additives with full FDA and EU food-contact applications. So, for example, its products can be found in ice-cream as well as ice-cream tubs: in the former to ensure heat-shock stability and a creamy texture, and in the latter where it acts as a mould release and anti-static additive. The company has mould release additives for various polymers, including PP, PE, PVC, and PC, where they provide an alternative to conventional amine and amide products. Einar 601, for example, can be used in a very broad range of PE applica- tions. Palsgaard says it delivers excellent perfor- mance when used in the thin walled pieces. It also acts as a processing aid. In tailored formulations for PP compounds, anti-static additives such as Einar 201 and Einar 411 facilitate mould release and denesting, at concentrations as low as 0.1%. “The low dosing concentrations and natural composition of the Einar polymer additives will not interfere with mechanical nor with chemical end-of-life recycling schemes,” the company says.

Palsgaard’s Einar mould release performance in homopolymer vs. conventional GMS Source Palsgaard

48 INJECTION WORLD | June 2021

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