The assessment of snap attachment strength is an important criterion especially in the design and manufacturer of garment of infants and children wear. The measurement of an uniform force applied to the snap attachment shall be recorded by means of a force-measuring device (in this case a calibrated Imada Push/Pull Scale is utilised). Once the appropriate force is registered on the Imada Scale, a stop clock is used for recording a set period of time.
The aim is: To define the garment manufacturer responsibilities and duties to ensure that snaps are applied appropriately to all garment; To prevent separation between the snap and the garment, which represents a dangerous situation if the loose snap, is swallowed
Scope: This test method covers and uniform force required pulling a snap attachment perpendicular to the garment. The snap attachment is not supposed to separate from the garment. This test method is used to establish correlation to wear conditions and for comparing different brands and types of snap fasters
ASTM Designation: D 4846-96 (2004)
Standard Test Method for Resistance to Unsnapping of Snap Fastener
Consumer Products Safety Commission
ASTM Designation: D123, D1776, D76
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