The Volkswagen AG standard TL 52388 (technical delivery condition) is applied by the core brands VW and Audi as well as the VW subsidiaries Skoda and SEAT.
TL 52388 refers to polypropylene (PP) parts in vehicle interiors and describes the material requirements.
After preconditioning, the following tests are possible:
density
according to DIN EN ISO 1183-1
ash residue
according to DIN EN ISO 1172
yield stress
according to DIN EN ISO 527-2
elongation of the yield stress
according to DIN EN ISO 527-2
bending modulus of elasticity
according to DIN EN 178
impact strength
according to DIN EN ISO 179-1/1.eA
impact strength
according to DIN EN ISO 179-1/1eU
heat aging
according to TL 52388
hot exposure
according to PV 1303 (flatbed device)
melting temperature
according to DIN EN ISO 3146
cold behavior
according to TL 52388
ball drop test
according to PV 3905
scratch resistance
according to PV 3952
writing stability
according to PV 3974
Burning behavior
according to TL 1010
stress whitening behavior
according to PV 3966
stickiness
according to PV 1306
