1-10-SJ3540

3 Dual Lock™ Reclosable Fasteners SJ3540 (Type 250)* SJ3541 (Type 400) SJ3542 (Type 170) Technical Data Product Description November, 2002 3M™ Dual Lock™ Reclosable Fasteners offer advanced closure alternatives to zippers, screws, snaps, hooks, bolts and more. They offer greater design flexibility, faster product assembly, smoother and cleaner exterior surfaces and improved product performance in many applications. The fasteners consist of continuous strips of polyolefin with polyolefin stems having a mushroom shaped top. The mushroom heads allow the fasteners to easily slide over each other allowing positioning of parts before they are snapped together creating a firm fastening attachment. Simply peel the pieces apart by hand to disengage. 3M™ Dual Lock™ Reclosable Fasteners SJ3540, SJ3541 and SJ3542 all contain a synthetic rubber based adhesive on a 1/32" conformable polyethylene foam backing covered by a liner. This construction allows for better contact with substrates having slight texturing or surface irregularities. This product construction is especially suited to indoor applications or where elevated temperatures are not experienced. Suggested combinations of mated fasteners are Type 170 to Type 250, Type 170 to Type 400, Type 250 to Type 250, Type 250 to Type 400, or for a quick grab attachment with high strength but limited cycle life any of the Dual Lock products can be mated with 3M™ Scotchmate™ Loop Reclosable Fasteners. See the technical bulletin on attachments (70-0709-3929-6). *Type 170 (approximately 170 stems per square inch) Type 250 (approximately 250 stems per square inch) Type 400 (approximately 400 stems per square inch) Product Construction Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. Fastener Products Material of Construction Stem/Heads Backing Adhesive Dual Lock SJ3540 (Type 250) Dual Lock SJ3541 (Type 400) Polypropylene Polypropylene Synthetic Rubber on Polyethylene Foam Standard Color Thickness(a) unmated ± 15% Black 0.14" (3.5 mm) 0.14" (3.5 mm) 0.064 oz/in2 (0.28 g/cm2) 0.068 oz/in2 (0.30 g/cm2) Selvedge Edges Weight(a) Liner Dual Lock SJ3542 (Type 170) 0.14" (3.5 mm) None White 5 mil (0.13 mm) thick silicone treated polyolefin liner. a) All thickness and weight values are with the liner removed. 0.057 oz/in2 (0.25 g/cm2) Dual Lock Reclosable Fasteners TM SJ3540 (Type 250) • SJ3541(Type 400) • SJ3542 (Type 170) Typical System Performance Physical Properties and Performance Characteristics Note: The following technical information and data is intended as a user guide representing typical performance and should not be used for specifications. Unless stated differently, typical performance characteristics were measured under controlled laboratory conditions of 72°F (22°C) and 50% Relative Humidity to obtain maximum reliability. The user should evaluate products in the actual application to ensure suitable performance for the intended use. System Performance(a) 3M™ Dual Lock™ Reclosable Fastener SJ3542 (Type 170) engaged to 3M™ Dual Lock™ Reclosable Fastener SJ3540 (Type 250) TENSILE (Rigid to Rigid Substrates) Dynamic Tensile Engagement Strength Dynamic Tensile Disengagement(c) Static Tensile Holding Power 100°F/100% RH 120°F 140°F 158°F SHEAR (Rigid to Rigid Substrates) Dynamic Shear (1" x 1" overlap)(c) Static Shear Holding Power 100°F/100% RH 120°F 140°F 158°F PEEL AND CLEAVAGE(c) Cleavage Strength (Rigid to Rigid) Peel Strength (“T” Peel, Flexible to Flexible) Peel Strength (90° Peel, Flexible to Rigid) ENGAGED THICKNESS(d) (Nominal without liner) CLOSURE CYCLE SHELF LIFE(f) LIFE(e) 3M™ Dual Lock™ Reclosable Fastener SJ3540 (Type 250) engaged to 3M™ Dual Lock™ Reclosable Fastener SJ3541 (Type 400) 3M™ Scotchmate™ SJ3527 (loop) engaged to 3M™ Dual Lock™ Reclosable Fastener SJ3540 (Type 250)(b) lbsF/sq inch (kNewtons/m2) @ 72°F/50% RH 15 (103) 40 (276)