ASK A 3M EXPERT June, 2014 3M Dual Lock Reclosable Fastener SJ3463 Product Description 3M Dual Lock Reclosable Fasteners are positive locking, hidden fasteners designed for use in a variety of attachment solutions. They consist of continuous strips of polyole n stems with a mushroom shaped top protruding up from the backing. When snapped together the mushroom shaped caps interlock producing a strong reliable Fastener. The standard Dual Lock fasteners are available in three di erent stem densities (170, 250 and 400) referring to the approximate number of stems per square inch. (26, 39, 62 stems per square centimeter) By inter-locking di erent stem density combinations you can create the strength that suits your application more total stems give higher strength. The Dual Lock Reclosable fasteners can be mated in the following combinations of increasing closure strength: Type 170 to Type 250, Type 170 to Type 400, Type 250 to Type 250 and Type 250 to Type 400. We do not recommend using the Type 170 to 170 because it does not have enough strength for a good connection. We do not recommend using the Type 400 to 400 because it is too strong and may cause stems and heads to rip out rendering the fastener no longer reclosable. The Dual Lock Low Pro le has one stem density of approximately 705 stems per square inch and they interlock to themselves. The low pro le products are not intended to mate to the standard size Dual Lock. There are a variety of pressure sensitive adhesives available with Dual Lock to cover most application needs. The pressure sensitive adhesive makes the Dual Lock easy to use, simply remove the liner, place the Dual Lock and apply rm consistent pressure to assure good contact with the substrate you are adhering. We also o er non-adhesive backed Dual Lock for applications where the PSA does not meet your needs. Product Features Easy Alignment: Dual Lock fasteners engage in any direction or position. The mushroom stems slide into position until they are engaged by snapping together applying rm pressure, this eliminates concerns about misalignment or spontaneous engagement. Positive Locking: Dual Lock fasteners engage/fasten with an audible snap and detectable movement assuring complete and secure closure. Reclosability: Dual Lock fasteners can be opened and closed for multiple closure applications (high cycle life). Blind Attachment: Dual Lock fasteners can be attached on the backside of substrate (i.e. trim piece) where it will not interrupt the show surface. Rattle-Free: Dual Lock fasteners will not rattle loose. Ease of Assembly: Dual Lock fasteners can be used to attach components before they enter the nal assembly plant, reducing the number of parts and the assembly time. No tools are required. Adjustable Strength: By selecting di erent combinations of the various stem densities of the Dual Lock the fastener can be designed to meet the strength needs of the designer. Product Forms: Dual Lock fasteners come in a variety of forms: Backed with Pressure Sensitive adhesive, Non-woven, Rigid backed, Die Cut Shapes, and low pro le. Attachment Methods: The wide varieties of Dual Lock fasteners allow a design engineer exibility to be able use and attach Dual Lock to just about any substrate or application. Peel and stick pressure sensitive adhesive backed is quick and easy yet strong and secure. Non-woven backed can be used with a variety of adhesive choices such as hot melt, liquid, epoxies, sealants, etc. We have parts that can be attached with a screw or rivet rigid and plain backed for developing your own special device.3M Dual Lock Reclosable Fastener SJ3463 General Information This product for alternative attachment methods requires a unique attachment method and, based on how this product is used, the heat resistance, tensile and shear strength can vary. This product does not have adhesive backing, so there is no release liner. Product Family: 13/16 piece part circle with hole for screw or rivet attachment Technical Information Note The following technical information and data should be considered representative or typical only and should not be used for speci cation purposes. Typical Physical Properties Property Values Notes Dual Lock Color Black Thickness 5.08 mm 200 mil Engaged to itself or to one of the 8.89 mm 350 mil Would not typically engage to itself same family Stems 62 Stems/cm 400 Stems/in Typical Performance Characteristics Temperature Use Range note Typical temperature performance for Dual Lock products with no adhesive backing on them while supporting 2.2 lbs/ in2 (1.0 kg/in2) in tensile or shear loads would range from -20F to 220F (-12C to 104C). This may change depending on the attachment method used, for example if you use an adhesive to attach the Dual Lock to a substrate the temperature resistance of the adhesive most likely will dictate the overall performance. Note The following technical information and data is intended as a guideline to assist customers in selecting 3M Reclosable Fasteners for further evaluation. This technical information is not product release speci cations or standards. Unless stated di erently, the typical system performance and product properties were obtained using speci c test methods under controlled laboratory conditions of 72F 5F and 50% 10% relative humidity. The user is responsible for evaluating 3M reclosable fasteners under expected use conditions to ensure suitable performance for the intended application. These are typical values which were gathered from testing the PSA backed materials. Similar values can be expected when the Dual Lock is held securely in a rigid fashion. Tests were run at 12 inches per minute Dynamic Tensile (Engage) Substrate 9 N/cm 13 lb/in Type 170 to 250 14.5 N/cm 21 lb/in Type 170 to 400 15.2 N/cm 22 lb/in Type 250 to 250 21.4 N/cm 31 lb/in Type 250 to 400 18.5 N/cm 27 lb/in Low Pro le to Low Pro le Property: Dynamic Tensile (Engage)