SIST EN ISO 12947-4:1999 PDF

Overview

EN ISO 12947-4:1998 - "Textiles - Determination of the abrasion resistance of fabrics by the Martindale method - Part 4: Assessment of appearance change" specifies a visual assessment method for measuring appearance change after Martindale abrasion. It applies to all textile fabrics (including nonwovens) and to cases where the end-use expects a low abrasion wear life. This part complements other Martindale parts (apparatus, mass loss, specimen breakdown) and differs appreciably from ISO 12947-2 and -3.

Key topics and technical requirements

• Test principle: Circular specimen is rubbed against a standard abrasive fabric in a Lissajous translational motion; the specimen holder also rotates freely. Appearance change is assessed either after an agreed number of rubs or by determining the rub interval when a defined surface change occurs.
• Apparatus: Uses the Martindale abrasion tester per ISO 12947-1. Test mass of the specimen holder and spindle is specified as (198 ± 2) g.
• Specimen and abradant dimensions: Typical specimen diameter ≥ 140 mm; abradant diameter 38 mm; felt substrate diameter 140 mm; foam backing 38 mm (tolerances given).
• Conditioning and atmosphere: Standard atmosphere per ISO 139: 20 ± 2 °C and 65 ± 5% relative humidity.
• Sampling and preparation: Sampling rules referenced to ISO 2859-1; at least three specimens; handling to minimize tension; special guidance for patterned, stretch (elastane) and pile/cord fabrics (Annex A).
• Test intervals: Predefined rub intervals are provided (series a, b, c) - e.g., for expected low rub counts (