SJ3261

3 Dual Lock Reclosable Fasteners for Transportation Industry TM Selection Guide Product Information General Description March, 2004 3M™ Dual Lock™ Reclosable Fasteners are positive-locking, blind fasteners designed for attaching headliner, wall and door panels in the transportation industry. The products feature mushroom-shaped polyolefin stems that snap together, forming a high tensile closure. Dual Lock reclosable fasteners are used primarily to secure rigid and semi-rigid surfaces. Some examples are to prevent headliner sag, attach center consoles, instrument panel bezels, headliners, wall and door panels and other interior trim. Dual Lock reclosable fasteners overcome the often difficult alignment and installation problems of screws and hidden fasteners. Dual Lock reclosable fasteners offer a cost effective alternative to traditional fasteners. Benefits 1. Easy Alignment: Dual Lock reclosable fasteners engage in any orientation. The heads slide over each other until they are engaged with firm pressure, eliminating concerns about misalignment, premature or incomplete engagement. 2. Reclosability: Dual Lock reclosable fasteners can be opened and reclosed in high cycle life applications. 3. Rattle-Free: Dual Lock reclosable fasteners typically won’t rattle loose. 4. Blind Attachment: Dual Lock reclosable fasteners can be attached on the backside of a trim piece where it won’t interrupt the show surface. 5. Ease of Assembly: Dual Lock reclosable fasteners can be attached to components before they enter the assembly plant, reducing the number of parts and the required assembly time. 6. Multiple Attachment Methods: Dual Lock reclosable fasteners can be attached to a variety of surfaces by A) adhesive attachment with hot melt or pressure-sensitive adhesives, B) mechanical attachment using rigid back parts, C) high strength popin parts, D) sewing, E) stapling, or F) ultrasonic fusing. Custom mold-in parts for low temperature/low pressure mold applications are also available. 7. Positive Locking: Dual Lock reclosable fasteners fasten with an audible snap, assuring secure closure. 3M™ Dual Lock™ Reclosable Fasteners for Transportation Industry Selection Guide 3M™ Dual Lock™ Reclosable Fasteners are available in three stem densities: Type 170 170 stems/sq in (approximately 26 stems/sq cm) Type 250 250 stems/sq in (approximately 39 stems/sq cm) Type 400 400 stems/sq in (approximately 62 stems/sq cm) Low Profile 705 stems/sq in (approximately 110 stems/sq cm) Dual Lock Reclosable Fasteners can be mated in the following combinations: 170 to 250 Easy opening for multiple closures. low engagement force, low tensile strength. 250 to 250 170 to 400 Medium engagement force balanced with moderate tensile strength. 250 to 400 Higher engagement force balanced with high tensile strength. Dual Lock to 3M™ Scotchmate™ Loop Quick grab engagement giving high peel force. Low Profile One half the thickness of Dual Lock, easier to engage, flexible. Headliners ▲ Door panels ▲ CHMSL Covers ▲ Trunk liners ▲ ▲ Applications Trim panels Instrument panel bezels ▲ -2- 3M™ Dual Lock™ Reclosable Fasteners for Transportation Industry Selection Guide Attachment Options 3M™ Dual Lock™ Reclosable Fasteners Plain Back/Pressure-Sensitive/Non-Woven Backed All available in 50 yard rolls except as noted, up to 4 in. (101.6 mm) wide. Plain Back Dual Lock reclosable fasteners can be attached to surfaces by sewing, stapling, ultrasonically fusing to many polypropylene materials or use of liquid adhesives which bond polypropylene. Pressure-Sensitive Dual Lock reclosable fasteners utilize 3M™ High Performance Acrylic Foam Tapes, which adhere to most automotive surfaces such as painted steel, aluminum, stainless steel and ABS. On some surfaces, primers may be required. Non-Woven Backed Dual Lock reclosable fasteners utilizes a polyolefin non-woven loop backing to facilitate attachment with hot melt or liquid adhesives to substrates. Recommended combinations, listed in order of increasing strength: 170 to 250, 170 to 400, 250 to 250, 705 to 705, 250 to 400, Dual Lock to 3M™ Scotchmate™ loop. Note: Type 170 to 170 and Type 400 to 400 are not recommended combinations. Plain Back Non-Woven Pressure-Sensitive Plain Back Pressure-Sensitive 5 mil Acrylic Foam Tape 15 mil Acrylic Foam Tape 15 mil Acrylic Foam Tape 37 mil Acrylic Foam Tape 43 mil Acrylic Foam Tape 47 mil Acrylic Foam Tape 60 mil Acrylic Foam Tape 80 mil Acrylic Foam Tape 5 mil Adhesive Transfer Tape Non-Woven Backed Rigid Back (Approx. stems/cm2) 250 400 SJ3780 SJ3741 170 SJ3742 – – – SJ3752 SJ3244 – – SJ3756b SJ3773 SJ3754c – aAll – SJ3787 – SJ3781 SJ3245 – – SJ3789b SJ3782 SJ3223c SJ3768 engaged thicknesses are for Type 250 engaged to Type 250 or Type 705 engaged to Type 705. b45 – SJ3785 – SJ3751 – SJ3777 SJ3788 SJ3757b SJ3774 SJ3753c SJ3481 SJ3766 yard rolls 705 – SJ4570 – SJ4580 – – – – – – – – cmaximum Engaged Thicknessa mils (mm) 0.14 (3.7) 0.11 (2.7) 0.18 (4.5) 0.13 (3.2) 0.21 (5.4) 0.21 (5.4) – – 0.31 (7.8) 0.16 (4.1) 0.24 (6.1) 0.24 (6.1) 0.23 (5.8) width is 3 in. (76.2 mm) Rigid Back Rigid Back Dual Lock reclosable fasteners are designed for mechanical attachment (such as riveting) or for sliding into retention brackets. Identification Dual Lock Reclosable Fastener Products 170 250 400 SJ3736 SJ3227 SJ3228, SJ3237, SJ3737 SJ3229 SJ3717, SJ3750 SJ3712 SJ3251 SJ3234, SJ3235, SJ3263 SJ3463, SJ3465, SJ3755 SJ3759, SJ3762, SJ3763, SJ3765 – SJ3238 SJ3236 – – SJ3252, SJ3261, SJ3767 – – SJ3231 – – SJ3735 Rectangular Slide-In Part Round Round Part with center hole with no center hole Square Parts with holes Slide-In Rectangle with hole Miscellaneous Pop-In Parts Pop-In parts are designed for insertion into sheet metal or plastic holes and key ways. Other sizes are available. Identification Pine Tree Stem Dual Lock Reclosable Fastener Products 170 250 400 – SJ3209 SJ3224 SJ3222 SJ3748, SJ3749 – SJ3221 SJ3731 SJ3226 SJ3704 SJ3708, SJ3711, SJ3719 SJ3713 – – SJ3715 – – SJ3747 – – SJ3709 Square top with pine tree stem Square top with single disk Square top with rectangle stem Single Disk Stem Rectangular Base Square top on round stem Twin Rose Bud Square top with trapezodial stem See list of attached products for specific description and sizes. -3- 3M™ Dual Lock™ Reclosable Fasteners for Transportation Industry Selection Guide General Physical Properties Material Polyolefin (3M™ Dual Lock™ Pressure-Sensitive Reclosable Fasteners utilize polyolefin liner.) Color Black or Clear Environmental Stability Excellent moisture resistance. Recommended temperature range: -20°F to 220°F (-12°C to 104°C). Shelf Life Product should be used within 2 years from date of manufacture when stored in original package at 72°F (22°C) and 50% R.H. Flammability Dual Lock reclosable fasteners should be tested as a composite with the component it is attached to for FMVSS 302 certification. Also see the Flame Resistant Products data page (70-0707-3992-8). Thickness Because of the wide variety of backing options it is suggested you consult specific data page for products that may be of interest to your application. Engaged Thickness in. (mm) Engaged to Plain Back PressureSensitive* Rigid Back** Pop-In*** Plain Back 0.15 (3.81) 0.19 (4.82) 0.24 (6.09) 0.23 (5.84) 0.22 (5.59) 0.27 (6.86) 0.27 (6.86) 0.35 (8.89) 0.35 (8.89 Pressure Sensitive* Rigid Back** Pop-In Stem*** 0.35 (8.89) Tolerance on Engaged Thicknesses is ± 20%. *Using 0.143 in. (3.63 mm) thick material, does not include the liner **Using 0.190 in. (4.83 mm) thick material ***Does not include pop-in stem -4- 3M™ Dual Lock™ Reclosable Fasteners for Transportation Industry Selection Guide Performance Properties Typical system performance properties of 3M™ Dual Lock™ Reclosable Fasteners at 72°F ± 5°F (22°C ± 3°C) and 50% ± 10% R.H. attached to aluminum panels. Note: Attachment method or use of other fasteners may affect system dynamic performance listed below. System Dynamic Tests Initial Engagement lbsF/sq in ( ) (k Newton) m2 Initial Disengagement lbsF/sq in2 ( ) (k Newton) m2 Dual Lock Reclosable Fasteners SJ3752 to SJ3781 170 to 250 SJ3781 to SJ3781 250 to 250* SJ3752 to SJ3751 170 to 400 SJ3781 to SJ3751 250 to 400 SJ3781 to SJ3571 250 to Loop 19 (131) 29 (200) 29 (200) 40 (276)