Results achieved by BOSTIK FINDLEY: In the framework of the project BOSTIK FINDLEY covered packaging adhesives based on polyvinyl acetate dispersions. Based on the experience gained in testing commercial products, a new product was formulated - named Findtack 30 - with a better performance in terms of separability by screening. In this context, two non-plasticized polyvinyl acetate dispersions were formulated in a first step.
After their recycling characteristics had been identified, one of these dispersions was considered a suitable starting material for a new adhesive with superior recyclability. The newly designed product gave good results in terms of runnability, viscosity, setting time and open time. The new adhesive showed good performance for the production of standard boxes. Favourably, the new Findtack 30 did not affect the mechanical properties of the box. Regarding the behaviour in recycling process, it was possible to remove 80 % of the adhesive by 0.2 mm screening compared with 40 % for conventional commercial adhesives. Findtack 30 seems very promising, because it meets the specifications in terms of recyclability, performance and price. Results achieved by BASF: