Dual LockTM Low Profile Reclosable Fastener SJ-4570 Preliminary Product Data Sheet Updated : May 2000 Supersedes : New Product Description 3MTM Dual LockTM Low Profile Reclosable Fasteners can replace conventional fasteners such as, screws, clips, rivets, snaps and bolts in many applications where items need to be accessed or repositioned frequently. Dual Lock low profile reclosable fasteners consist of continuous strips of plastic backing, with tiny plastic mushroom shaped stems protruding up from the backing strip. When two pieces of Dual Lock low profile reclosable fasteners are pressed together, thousands of "mushroom heads" interlock with one another creating an audible snap which announces that the fastener is locked. The Dual Lock low profile reclosable fastener is thinner allowing it to be more flexible than similar reclosable fasteners. In addition, the Dual Lock low profile reclosable fastener offers intermediate strength between regular Dual Lock reclosable fasteners and 3M ScotchmateTM reclosable fasteners, with all of the advantages of a self-mating product. Product Construction Material of Construction Polypropylene Backing Colour Clear Adhesive Clear Acrylic Liner Paper, Diecuttable Weight 0.31 grams/1" (25mm) Operating Temperature Range Engaged Thickness 15% (without liner) -20F (29C) and up to 158F (70C) Plasticiser Resistance No Closure Cycle Life 25-100 Cycle Life is the number of cycles (openings and closings) that the fastener is subjected to while maintaining 50% of the original values for tensile, shear or peel. 12 months from date of manufacture when stored in original package at 72F (21C) and 50% relative humidity. Physical Properties Not for specification purposes Shelf Life 0.067 in. 1.7 mm 2 Date : May 2000 Dual Lock Low Profile Reclosable Fastener SJ-4570 Performance Characteristics Dynamic Tensile Engagement Strength 25.9 lbs./sq. inch (kN/m) 42.4 lbs./sq. inch (kN/m) 45.4 lbs./sq. inch (kN/m) Dynamic 90 Peel Adhesion 25.9 lbs./inch width (N/100mm) Dynamic Tensile Disengagement Strength 42.4 lbs./sq. inch (kN/m) Not for specification purposes Closure Performance Performance Characteristics Dynamic Tensile Disengagement Strength Dynamic Shear (1" x 1" overlap) Strength Not for specification purposes Adhesive Performance Dual Lock low profile reclosable fastener SJ-4570 was disengaged, peeled or cleaved at the rate of 12 inches (305mm) per minute. Note : Application Techniques In long term static load applications, conditions such as temperature variation, jarring, vibration etc. can affect long term performance. The user should design the amount of fastening area based on the specific conditions in the application. Four square inches of fastening area per pound of static load is suggested as a starting point for such evaluations. Surfaces must be smooth, thoroughly cleaned and free of oil and surface contamination and dry. In some exceptional cases (contamination by mould release, rough or porous surfaces etc.) it may be necessary to sand or lightly abrade the surface. It is recommended that the substrate be cleaned with a solvent such as isopropanol/water solution (50/50) and allowed to dry before application of fastener. Note : When using solvents, be sure to follow the manufacturer's precautions and directions for use when handling such materials. Apply when fastener and surface temperatures are above 68F (20C). Remove protective liner (avoid contamination of adhesive) and apply with uniform, firm pressure for intimate surface contact to the substrate. Allow 72 hours dwell for maximum bond strength prior to testing or stressing the adhesive bond. Improved resistance to edge peel can be provided be recessing the Dual Lock low profile reclosable fastener or by rounding the corners. General Information PRESSURE SENSITIVE ADHESIVE ATTACHMENT : The adhesive system on SJ-4570 provides reliable bonding to a wide variety of materials including but not limited to those listed below : Bare Metals Painted Metals Glass Fibreglass Sealed Wood Structural Composites Many Plastics : ABS Acrylic Polycarbonate Polystyrene Rigid Vinyl Powder Coated Paints 3 Date : May 2000 Dual Lock Low Profile Reclosable Fastener SJ-4570 Application Ideas Backed with 300 LSE Laminating Adhesive technology, Dual Lock low profile reclosable fasteners are designed for joining together dissimilar materials such as powder-coated paint and hard-to-bond to surfaces as well as acrylic, wood, glass, metal, polypropylene, foam and fibreglass. Used in Point of Purchase and Trade Show Exhibition, marine, electronic and automotive markets, Dual Lock low profile reclosable fasteners attach ceiling tiles, carpet, headliners, seat cushions, covers, trade show designs, access panels, wall panels and small electronic devices. 3M, Dual Lock and Scotchmate are trademarks of the 3M Company. Values presented have been determined by standard test methods and are average values not to be used for specification purposes. Our recommendations on the use of our products are based on tests believed to be reliable but we would ask that you conduct your own tests to determine their suitability for your applications. This is because 3M cannot accept any responsibility or liability direct or consequential for loss or damage caused as a result of our recommendations. 3M United Kingdom PLC 2000 Tapes & Adhesives Group 3M United Kingdom PLC 3M House, PO Box 1, Market Place, Bracknell, Berkshire, RG12 1JU Product Information : Tel 0870 60 800 50 Fax 0870 60 700 99 3M Ireland 3M House, Adelphi Centre, Upper Georges Street, Dun Laoghaire, Co. Dublin, Ireland Customer Service : Tel (01) 280 3555 Fax (01) 280 3509 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: 3M: SJ4570CL CLEAR