Spanish energy and chemicals company Repsol (Madrid; www.repsol.com) said it has developed a range of bio-based polyolefins with a negative carbon footprint on a cradle-to-gate methodology under ISO 14067 for the medical and pharmaceutical industries.

A first-generation range is made from sustainable organic oils while the second-generation bio-based polyolefins are based on organic waste, according to the supplier. It said the range replaces traditional feedstock used at Repsol’s industrial sites with bio-based feedstock from oil from sustainable crops or from the reuse of organic waste.

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The range is ISCC Plus certified for traceability through mass balance and meets strict cleanliness and safety requirements for pharmaceutical and medical device applications, Repsol said. The bio-based feedstock reportedly improves carbon footprint to -1 tCO₂/t for the first-generation polyolefins and -2,5 tCO₂/t for the second generation.