3 Dual Lock Low Profile Reclosable Fastener SJ4580 SJ4580C Technical Data December, 2003 Product Description 3M Dual Lock Low Profile Reclosable Fasteners SJ4580 and SJ4580C have a clear 15 mil acrylic adhesive system with approximately 705 stems per square inch 2 (109 stems/cm ). Dual Lock low profile reclosable fasteners can reduce the number of or replace conventional fasteners such as screws, clips, rivets, snaps and bolts in many applications. Dual Lock low profile reclosable fasteners consist of continuous plastic strips with stems protruding from a plastic backing with mushroom shaped tops. When two pieces of Dual Lock low profile reclosable fasteners are pressed together, the mushroom heads interlock with one another giving an audible snap, providing a fast reclosable attachment system. To open, simply pull or peel apart. Dual Lock low profile reclosable fasteners SJ4580 and SJ4580C are designed to function over a range of temperatures and humidity. The adhesive is especially suited for attachment to bare metals and a variety of substrates. For attachment to powder coated paints or other low surface energy substrates such as polyethylene or polypropylene, 3M Dual Lock Low Profile Reclosable Fastener SJ4570 and 3M Dual Lock SJ3540 family of products or our line of 3M Scotchmate Reclosable Fasteners with a rubber based adhesive should be evaluated. Dual Lock low profile reclosable fasteners can be mated to each other forming a reusable attachment system. In some cases, this fastener may be mated with 3M Scotchmate Loop Fasteners giving high peel and very high shear strength, but with fewer cycles than self-mated Dual Lock low profile reclosable fastener. Material of Construction Dual Lock low profile Dual Lock low profile Product Construction reclosable fastener reclosable fastener SJ4580 SJ4580C Stems Polypropylene Polypropylene Backing Polypropylene Polypropylene Adhesive High Temperature Acrylic High Temperature Acrylic Standard Colors Clear Clear (a) Thickness max. unmated Total inches (mm) 15% 0.074 (1.88 mm) 0.074 (1.88 mm) Extended Liner None None Selvedge Edge None None 2 2 Weight ozs/in (g/cm ) 2 2 2 2 Total Product without liner 0.013 oz/in (0.057 g/cm ) 0.013 oz/in (0.057 g/cm ) Liner Red, non-silicone liner Clear polypropylene film with red embossed 3M logo (4.5 mils) a) Thickness depends upon the amount of compression load on the pieces. All thickness and weight values are with the liner removed. 3M Dual Lock Low Profile Reclosable Fastener SJ4580 SJ4580C Typical performance characteristics shown below were measured under controlled laboratory Typical System conditions of 72F (22C) and 50% Relative Humidity when adhered to 1/16 in. aluminum panels Physical Properties unless stated otherwise to obtain maximum reliability The user should evaluate products in the and Performance actual application to ensure suitable performance for the intended use. Characteristics Note: The following technical information and data is intended as a user guide representing typical performance and should not be used as product specifications. a System Performance 3M Dual Lock Low Dual Lock low profile Profile Reclosable reclosable fastener b Fastener SJ4580 SJ4580 engaged to engaged to Dual Lock 3M Scotchmate low profile reclosable Reclosable Fastener fastener SJ4580 SJ3571 Loop 2 2 TENSILE (Rigid to Rigid Substrates) lbs /in (kNewtons/m ) F Initial Dynamic Tensile Engagement 27 (186) < 1.0 (6.9) c Initial Dynamic Tensile Disengagement 40 (276) 20 (138) 2 2 Static Tensile Holding Power Holds 2.2 lbs/in (155 grams/cm ) for indicated time and temperature 200F (93C) 10,000 minutes 10,000 minutes 220F (104C) 10,000 minutes 10,000 minutes 100F (37.8C)/100% RH 10,000 minutes 10,000 minutes 2 2 SHEAR (Rigid to Rigid Substrates) lbs /in (kNewtons/m ) F c Dynamic Shear (1 x 1 overlap) 41 (282) 138 (952) 2 2 Static Shear Holding Power Holds 2.2 lbs/in (155 grams/cm ) for indicated time and temperature 200F (93C) 10,000 minutes 10,000 minutes 220F (104C 10,000 minutes 10,000 minutes 100F (37.8C)/100% RH 10,000 minutes 10,000 minutes c PEEL AND CLEAVAGE Pounds/inch width (Kilograms/cm width) Peel Strength (T Peel, Flexible to Flexible) 0.5 (0.08) 6.2 (1.1) Peel Strength (90 Peel, Flexible to Rigid) 1.7 (0.3) 3.1 (0.55) Cleavage Strength (Rigid to Rigid) 4.0 (0.7) 6.1 (1.1) ENGAGED THICKNESS Inches (mm) Tolerance (Nominal without liner) 0.106 (2.69) 15% 0.148 (3.77) 20% d CLOSURE CYCLE LIFE 50 10 Note: Long Term Static Load: Conditions such as temperature variations, engagement area, closure pressure and vibrations or side to side movement after engagement or exposure to prolonged periods of moisture or other environmental factors can affect the closure strength and long term static load performance. Fasteners may slip or creep in the direction of the static load forces when subjected to static loads at temperatures or weights greater than indicated. The user is responsible for designing the amount of fastening area based upon the specific conditions for the application. Four square inches of fastening area per pound of static load is suggested as a starting point for such evaluations. a) System performance for 3M Dual Lock Low Profile Reclosable Fastener SJ4580 is similar to 3M Dual Lock Low Profile Reclosable Fastener SJ4580C with only difference being the liner which has no affect on performance. b) The use of 3M Scotchmate Reclosable Fastener loop engaged to 3M Dual Lock Low Profile Reclosable Fasteners provides increased strength over standard Dual Lock reclosable fasteners. Scotchmate reclosable fastener loop to Dual Lock reclosable fastener combinations provide fewer cycles when compared with Dual Lock reclosable fastener systems. Due to the very high strength of Scotchmate loop mated to Dual Lock reclosable fasteners, extra care should be given to ensure the maximum bond strength is obtained to the substrates being joined. Failure to obtain bond strengths sufficiently high to the substrate may cause the fastener to release from the substrate. c) 3M Dual Lock Low Profile Reclosable Fasteners SJ4580, SJ4580C and SJ3571 are engaged with firm pressure and disengaged, peeled or cleaved at the rate of 12 inches (305 mm) per minute. d) Cycle life is the number of cycles (openings and closings) that the fastener is subjected to while maintaining 50% or greater of the original tensile value. - 2 -