If you cannot find the original PDF, look for these active standards:
Universal Tensile Testing Machine equipped with standard pneumatic/manual grips or a specialized German Wheel Peel Fixture din 53357 pdf
For new projects, engineers often use DIN EN ISO 2411 (for rubber- or plastics-coated fabrics) or ISO 8510-1/2 (for adhesives and peel tests) as contemporary substitutes for adhesion testing. DIN 53357 - 1982-10 If you cannot find the original PDF, look