3M™ Dual Lock™ Reclosable Fastener SJ3768 is a black, polypropylene reclosable fastener roll good with a rigid-back. This fastener is available in a number widths and has a stem density of 250 stems per square inch.
3M™ Dual Lock™ Reclosable Fastener Roll Goods with a Rigid Back are designed for a more robust ultrasonic welding process, requiring fewer welds per piece. The thicker backing provides a more rigid fastener, thus reducing lifting or flexing during disengagement improving the disengagement strength while reducing fatigue of the ultrasonic welds during multiple disengagements.
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