Wintersun Co. Ltd, has a recently published patent application directed towards an eco-friendly packaging bag for delivery. The bag uses PLA biodegradable plastic material as base material. The bag is produced by spinning PLA fibers, manufacturing thin non-woven fabric, coating non-woven fabric, printing and forming a bag, and filling the PLA fibers.

Wintersun provides individual plastic solutions from research and development to customized manufacturing with a main focus of polylactic acid (PLA) products. The PLA products include an insulation pouch, a biodegradable zipper, and PLA-tape. Wintersun appears to be growing their IP portfolio as it has a German Patent DE202018106747U1 that was filed in November 2018. Wintersun is an expanding global company so their activity in the biodegradable packaging sector should be monitored moving forward.