PBL is a laminate which does not contain any aluminium, i.e. which entirely consists of plastic materials. This laminate consists of several PE layers with a so-called EVOH barrier embedded in between to protect the product.
Plastic Barrier - EVOH (Ethyl-Vinyl-Alcohol)
EVOH is a so-called flavour barrier based on PE. It prevents that product can diffuse from the tube. In addition, this barrier prevents substances from outside to diffuse into the tube and to change or spoil the product by reacting with it.
EVOH offers good barrier properties for all common products like cosmetics creams or gels, food products, household chemicals, technical filling goods and oral care products.