the wicovalve® w606e was developed especially for the coffee industry and can be composted pursuant to industrial standard en 13432 in combination with biodegradable laminates. failure rate of less than 0.01, comprehensive functionality, and a shelf life of three years, the valves represent the widely accepted benchmark today. it is based on the highly popular w606 coffee valve and is designed for heatsealing. the coffee roaster can now offer a packaging system that is totally biodegradable and provides optimized protection of wholebean coffee against aroma loss. sourcehttpnaturalplastics.blogspot.com201405worldfirstbiovalveforcoffee.html