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Textile Abrasion resistance in wet state testing method
2018/12/13
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Abrasion resistance of high performance fabrics was determined in accordance with the ISO 12947-3, but not in all details. Before determining abrasion resistance of high performance fabrics, Lissajous figure was checked for each work station by the method described in the Annex A (ISO 12947-1), the same as when determining it in dry state (HRN EN ISO 12947-3:2008).
Specimens were first cut with the same cutter as the foam and then placed in Petri dish.Distilled water with a softening agent was in the Petri dish. The specimens spent 5 minutes there, prior to every 5000 rubs (Fig. 3). After that, the specimens were mounted in the specimen holders, with a circle of standard foam, as described in the standard (ISO 12947-3).
Fig. 3. Samples during wetting
Woven wool felts, wool abradant fabric and foam were also placed in the Petri dish,together with distilled water and a softening agent, prior to every 5000 rubs (Fig. 4).
Fig. 4. Auxiliary materials during wetting
After 5 minutes, woven wool felts, wool abradant fabric and foam were placed on cellulose wadding, in order to remove excess liquid.
Woven felts were then placed on the abrading table, protected with a transparent film. Wool abradant fabrics were placed on them and pressed with the weight of the mass described in 2.2.1. (Fig. 5).
Fig. 5. Abrading table with a transparent film before clamping the ring The specimens were subjected to abrasive wear for a predetermined number of rubs, the same as in determining abrasion resistance, in accordance with the standard:
· 1000,
· 5000,
· 25 000,
· 50 000 and
· 100 000.
The mass of each conditioned test specimen was determined to the nearest 1 mg, before and after wetting. Mass loss in wet state was determined according to the HRN EN ISO 12947-3. Relative mass loss in wet state (fw) was also determined.
Martindale abrasion tester for the determination of abrasion resistance in wet state was prepared as shown in Fig. 6.
Fig. 6. Martindale abrasion tester prepared for wet abrasion
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