Snag Resistance Testing for Knitted Fabrics
topic
Snag resistance of knitted fabrics is measured by the mace snag tester method per ASTM D3939 where a fabric specimen is tumbled with a spiked mace for defined rotations, or the bean bag snag test per ISO 13937-4, with resulting snag density and prominence assessed against reference photographs to assign a snag grade from 1 to 5 that predicts surface loop pull-out and fabric appearance damage during wear and use.
Role
Evaluates the resistance of knitted fabrics to loop snagging from contact with rough surfaces, jewellery, and Velcro during wear that causes unsightly pulled loops on the fabric surface, with snag resistance being particularly important for fine gauge knitted fabrics in sheer hosiery and fine knitwear applications where loop snagging is a frequent consumer complaint requiring yarn and stitch structure selection guidance.
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