Processing and Validation of Whey-Protein-Coated Films and Laminates at Semi-Industrial Scale as Novel Recyclable Food Packaging Materials with Excellent Barrier Properties

Table 5

Mechanical properties of the PE and PET films before and after enzymatic removal of the interim whey coating from the multilayer films.

Sample	Stress at yield	Stress at break	Strain at break
	[MPa]	[MPa]	[%]
PE initially	12	30	150
PE after washing	10	19	400
PET initially	95	190	35
PET after washing	100	150	25