
3M ? Hook and Loop Reclosable Fasteners
SJP7401 Loop ? SJP7402 Hook ? SJA7501 Loop ? SJA7502 Hook
Design Considerations
? You will need to determine how much fastener will be needed to support your
application, however 4 square inches of 3M? Reclosable Fastener to support
1 pound of weight is our general suggestion.
? Rounding the corners of the fastener, slightly recessing the product into the
surface or providing raised edges around the Reclosable fastener can reduce the
possibility of edge lifting and improve the overall appearance of the fastener on
the finished product.
? These hook and loop Reclosable fasteners should be applied to surfaces that are
clean, dry and free of oil, grease, dust, mold release agents or surface
contaminants that could reduce the adhesion.
? To obtain an optimum bond to any surface, both the fasteners and the target
surfaces should have equilibrated for a minimum of 1 hour at temperatures
between 68°F (20°C) to 90°F (32.2°C) before application. The liner protecting
the adhesive is removed and preferably without touching the adhesive, the
fastener is applied to the surface to obtain initial contact between the adhesive
and substrate. Exposure of the adhesive to ambient conditions without the
protective liner, before applying to the surface, should be minimized as initial
adhesive tack may decrease. Flexible materials should be lying on a hard flat
surface so as to permit uniform adhesive contact with the surface. Use of a
rubber hand roller, press platen or similar device is recommended to ensure full
adhesive contact with the surface. Approximately 4.5 pounds of force per square
inch, (310 grams per square centimeter) is recommended to increase adhesive
contact, improving bond strength. For all adhesive applications, it is important
to ensure that the edges are rolled down to reduce the chance of edge lifting.
? It is essential that the user evaluate this product to determine whether it is fit for
a particular purpose and suitable for the user ’s method of application
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