
Biodegradable cigarette filters achieve key patent
In San Diego, biodegradable filter manufacturer Greenbutts says it has been granted a patent for ‘Biodegradable Cigarette Filter Tow and Method of Manufacture,’ which covers its food-grade, fiber-based filters with starch-based binders. Greenbutts’ filter material is a sustainable alternative to the standard filters made of synthesized cellulose acetate and has been shown to degrade in […]