Synthesis of Cationic Waterborne Polyurethanes from Waste Frying Oil as Antibacterial Film Coatings

Table 5

Mechanical properties of cationic waterborne polyurethane (CWPU) films with various internal emulsifier contents.

Formula	Hardness^a (g)	Flexibility^b (Ø, mm)	Adhesion^c
CWPU-1	200	3	3B
CWPU-2	300	3	3B
CWPU-3	300	3	3B

^aMaximum criterion of hardness was 1000 g and minimum was 50 g. ^bMaximum criterion of flexibility was 3 and minimum was 20. ^cMaximum criterion of adhesion was 5B and minimum was 0B.