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CleanFiber wants to turn millions of tons of cardboard boxes into insulation
The startup has raised $28 million to help fund a nationwide expansion of its cardboard-based cellulose building insulation.
Cardboard would seem like a perfect, paper-based solution to the insulation industry’s short supply, except there’s one problem: Corrugated boxes are riddled with contaminants like plastic tape, shipping labels, and even metal staples. Using an entirely new process to transform a different feedstock into a drop-in replacement for existing cellulose insulation was one challenge the company faced when developing its product. With a first-of-its-kind plant built and operational, CleanFiber has been able to traverse one of the most treacherous parts of the valley of death that often claims startups trying to commercialize a new technology.
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