Milkweed-Polyester Insulation Blend
topic
Milkweed floss blended with polyester microfibre (1.2–1.5 dpf) at 25–30% milkweed by weight produces a processable insulation batting via air-laying or carding, overcoming pure milkweed's non-spinnability due to smooth surface (friction coefficient 0.08–0.12 versus cotton 0.18–0.25) and short length. Blended batting at 80–120 g/m² achieves CLO value of 1.2–1.8 in standardised thermal resistance test (ISO 11092), equivalent to 550–650 fill power down. Bulk retention after 50 wash cycles (ISO 6330 at 30°C) is 85–90% versus 75–80% for equivalent polyester batting. Milkweed contribution reduces polyester content by 25–30%, lowering microplastic shedding in laundering by proportional amount. Carbon footprint of milkweed cultivation is negative (−1.2 to −2.0 kg CO₂e/kg fibre) due to soil carbon sequestration and minimal input requirements.
Role
Commercially viable sustainable insulation solution reducing synthetic fibre content in outdoor apparel insulation by 25–30%, lowering microplastic shedding and fossil fuel dependency while supporting North American milkweed ecosystem restoration for monarch butterfly populations.