INNOVATION | MEDICAL
copolymer resins can meet the healthcare industry’s growing need for high precision, vibration-free assembly technology by providing near-infrared (NIR) transmission optical properties that are required for laser welding and are said to enable leakproof, low stress welds without the need for adhesives. In 2022, SABIC introduced four new grades of
Right: Ineos Styrolution has introduced a new ASA grade designed
specifically for small medical device
housings and casings
LNP CRX PC copolymer resins for the healthcare and consumer products industry, featuring sustainability, thin-wall flame retardancy (FR), low-temperature ductility and UV stability. The advanced materials include the incorporation of non-brominated/ non-chlorinated flame retardants, and they also comply with thin-wall FR ratings, offering the potential to reduce part thickness and raw material usage, says Joshua Chiaw, Director, Business Management, LNP & Noryl, Specialties for SABIC. SABIC says its new LNP Elcres CRX7412U copolymer, and its biomass-balanced version, LNP Elcrin CRX7412UB, are candidates for replacing incumbent PC, ABS and polyester/co-polyester materials in thin-wall applications such as diagnostic and monitoring devices, durable medical equipment, and housings. The materials offer limited biocompatibility according to ISO 10993 Part 1 standards for toxicity, Part 10 standard for skin sensitization and Part 23 standard for irritation. The resin delivers excellent mechanical performance, notably a good balance of impact and ductility. LNP Elcrin CRX7412UB offers a reduction in carbon footprint up to 36% when compared to the fossil-based version, enabling it to earn ISCC Plus designation, the company says. SABIC also developed LNP Elcres CRX7416U and its biomass-balanced version LNP Elcrin CRX7416UB to address the increasing importance of thin-wall moulding in the design of smaller and lighter-weight applications like portable and hand-held medical equipment and wearable electronics, as well as for demanding consumer electronics and mobility applications such as mobile device housings and battery covers. The new grades maintain their high chemical resistance while adding value through improved thin-wall FR capability. LNP Elcrin CRX7416UB also offers a reduction in carbon footprint of up to 36% compared to the fossil-based version. Critically reviewed SABIC primary data, combined with the latest
50 INJECTION WORLD | September 2023
manufacturing data and industry average estimates was used in the cradle-to-gate comparison of the resins. Ineos Styrolution has introduced a new acrylonitrile styrene acrylate (ASA) grade designed specifically for small medical device housings and casings. The new Luran S MED 797S SPF30 extends the company’s ASA product family and delivers strong chemical resistance, impact strength, UV resistance and excellent flowability. Luran S MED 797S SPF30, available in NR
(Natur) and in white (WT000112), shows excellent chemical resistance against alcohols such as IPA, ethanol or propanol, or alcohol-based disinfectants. It also shows good resistance against quaternary ammonium or glutaral based disinfectants, making it a material of choice for clinical environments, the company says. The material exhibits high impact strength, specifically at room temperature and at low temperatures (5°C), which contributes to better protection of devices by avoiding cracking failures if a device drops to the floor. Ineos Styrolution says the material is a compelling alternative to standard ABS materials. The company also developed Luran S ECO MED 797S SPF30 BC40, a new Luran S grade that uses renewable feedstock, based on a biomass balance process certified under ISCC Plus. The 40% mass-balanced
renewable content results in a carbon
footprint reduction of up to 52% compared to fossil-based Luran S, according to Bernd Elbert, Market Development Manager. Repsol has developed a range of biomass- balanced (ISCC Plus certified) polyolefins for the medical and pharmaceutical industries that offer a negative carbon footprint on a cradle-to-grave methodology under the ISO 14067 standard. According to Repsol, a first-generation range includes sustainable organic oils in the feedstock, while its second-generation range is based on organic waste. The newly developed materials meet the strict cleanliness and safety requirements for medical and pharmaceutical device applications, the company said. The materials meet European pharmacopeia standards and offer healthcare product makers an opportunity to reduce CO2 emissions, while prioritising product safety.
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