The assessment of snap attachment strength is an important criterion especially in the design and manufacturer of garments 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 utilized). Once the appropriate force is registered on the Imada Scale, a stop clock is used for recording a set period of time.
To define the garments manufacturer responsibilities and duties to ensure that snaps are applied appropriately to all garments. To prevent separation between the snap and the garment, which represents a dangerous situation If the loose snap is swallowed.
This test method cover an uniform force required to pull a snap attachment perpendicular to the garment The snap attachment is not forced to separate from the garment. This method is required attachment of snaps to specimens using specifications provided by the producers of the snaps.
This test method is used to establish correlation to wear conditions and for comparing different brands and types of snap fasteners.
ASTM Designation :- D4846 88
ASTM Designation :- D1776ASTM P579.96
Standard Test Method for Resistance to Unsnapping of Stap Fasteners Consumer Products SafetyCommission