1.What is Snagging in Fabric?
In this article points like what is snagging in fabric and Fabric snagging test methods are covered. An article covering points like factors affecting fabric snagging, how to prevent fabric snagging, snagging resistance fabric/ anti-snagging fabric will be published soon.
“Snagging is defined as a defect caused by the pulling or plucking of yarns from a fabric surface.”
The snagging of a specific fabric in actual wear varies with the individual wearer and general condition of use. Knits used in a more rugged outerwear application, such as men’s slacks, result in very high and unacceptable levels of snagging.
2. Fabric Snagging Test Methods
ASTM has following fabric snagging test methods for testing snag resistance of fabric.
- Mace Test
- Bean Bag Test
2.1 Mace Test
2.1.1 Test Method
2.1.2 Mace Snag Tester
Suitability of Test:
2.2 Bean Bag Test
2.2.1 Test Method
|Bean Bag Snag Tester|
- Comparison of the tested specimen with visual rating standards that may be either snagged fabrics or photographs of snagged fabrics.
- Counting the number of snags.
The resistance to snagging can be reported in the first case on a numerical scale ranging from No.5 (no or insignificant snagging) to No.1 (severe snagging), and simply as number of snags in the second case.
The bean bag method to have the following advantages over other snagging tests in use:
- Snagging is multidirectional in end use and the bean bag method simulates this very effectively.
- This test is more realistic. The test fabric is mounted in a relaxed state nad tension occurs only as the weighted bean bag pulls the test specimen away from the tenter pins where it was impaled.
- Test data obtained from this test method is less variable.
- Due to multidirectional testing and low variation, half the number of test specimens were required.