Automotive. 3M Dual Lock Reclosable Fastening Systems

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Automotive Technical Data Sheet November 2012 3M Dual Lock Reclosable Fastening Systems Piece Parts: Pop-In, Die-Cut and Slide-In Shapes Description 3M Dual Lock Fastening Systems are re-closable,

Dual Lock fasteners are used primarily to secure rigid and semi-rigid surfaces such as trim or door panels, instrument panel bezels, headliners, and other automotive interior trim.

1 Automotive Technical Data Sheet November M Dual Lock Reclosable Fastening Systems Piece Parts: Pop-In, Die-Cut and Slide-In Shapes Description 3M Dual Lock Fastening Systems are re-closable, positive-locking, blind fasteners designed for attaching automotive trim components. The products feature mushroom-shaped polyolefin stems that snap together, forming a high tensile closure. Dual Lock fasteners are used primarily to secure rigid and semi-rigid surfaces such as trim or door panels, instrument panel bezels, headliners, and other automotive interior trim. 3M Dual Lock fasteners overcome the often difficult alignment and installation problems of screws and hidden fastener. They offer a cost effective alternative. 3M Dual Lock fasteners are available in various pop-in designs, die-cut shapes and slide-in constructions. 3M Dual Lock fasteners are also available with pressure sensitive adhesive. It combines the features of the Dual Lock fastener with 3M Automotive Acrylic Foam Tape for attachment to painted sheet metal and many other automotive substrates. Construction Examples Features Easy Alignment Reclosability Blind Attachment Vibration Resistant Ease of Assembly 3M Dual Lock fasteners engage in any orientation. The stems slide over each other until they are engaged with a firm pressure and an audible signal, eliminating concerns about misalignment or premature engagement. 3M Dual Lock fasteners can be opened and closed up to 1000 times, depending on the application. 3M Dual Lock fasteners can be attached on the rear side of the interior part where it won t interrupt the show surface. Will not vibrate or rattle loose. 3M Dual Lock fasteners can be attached to components before they enter the assembly plant, reducing the number of parts and the required assembly time. Attachment 1 of DHOG-7S3BCU Page 1 of 7

3M Dual Lock Types Dual Lock Fasteners are available in three stem densities: DL stems/ inch² DL 250 250 stems/ inch² DL 170 170

based on typical performance of Dual Lock reclosable fasteners with pressure sensitive adhesive securely attached to rigid

In general the more rigid the attachment system chosen, the higher the disengagement performance strength.

3 24.2 6.9-13.8 27.6 34.5 41.4 62.1 Initial Disengagement* 170 / 250 / 250 250 / / [N / cm 2 ] 20.7 27.6 24.2 31.1 31.1 38.0 38.

Depending on engaged area, the combination DL / DL can be considered as a permanent fixation.

2 3M Dual Lock Types Dual Lock Fasteners are available in three stem densities: DL stems/ inch² DL stems/ inch² DL stems/ inch² (62 stems/ cm²) (39 stems/ cm²) (26 stems/ cm²) 3M Dual Lock Combinations The values listed in the table below are based on typical performance of Dual Lock reclosable fasteners with pressure sensitive adhesive securely attached to rigid surfaces. Engagement and disengagement performance are affected by the tape type and density and the substrate hardness. In general the more rigid the attachment system chosen, the higher the disengagement performance strength. Typical Engagement / 3M Dual Lock Combinations Disengagement Force Initial Engagement* 170 / 250 / / / [N / cm 2 ] Initial Disengagement* 170 / 250 / / / [N / cm 2 ] The combination DL 170 / DL 170 is not recommended. Depending on engaged area, the combination DL / DL can be considered as a permanent fixation. *Tests according to 3M LS 133 with 25mm/min crosshead speed and run at 23 C and 50% R.H. Note: This technical information and data should be considered representative or typical only and should not be used for specification purposes. Attachment 1 of DHOG-7S3BCU Page 2 of 7

3 General Physical Properties of 3M Dual Lock Reclosable Fasteners Note: This information relates to plain Dual Lock Material Color Environmental Stability Polyolefin. Black. Excellent moisture resistance. Recommended temperature range -29 to 104 C (-20 to 220 F) The engagement and disengagement forces are affected by temperature. Lower operating temperatures show higher level of forces; higher operating temperatures result in lower level of forces. Please make sure the designed Dual Lock area is appropriate for the application temperature range. Shelf Life Use within 2 years after manufacturing when stored in original package at 16 to 27 C (60-80 F) and 40%-60% relative humidity. Flammability Application 3M Dual Lock Reclosable Fasteners should be tested as a composite with the component it is attached to for FMVSS 302 certification. Plain-backed Dual Lock Reclosable Fasteners have a thickness of 2.57 mm +/ mm. The engaged thicknesses of the piece parts combined with other Dual Lock parts are listed in the chart Engaged Dual Lock on Page 6. It is recommended to test the 3M Dual Lock/Acrylic Foam Tape construction on the appropriate substrate under the typical loading conditions (static, dynamic, temperature and load). Please make sure that the 3M Dual Lock area is appropriately in size to guarantee static and dynamic load, which is needed for this attachment application. It is recommended to have a bigger sized Dual Lock part on one side, so that a full-surface engagement of the attached part can be guaranteed. In order to avoid any cleavage of the Dual Lock parts, please make sure that the parts are attached in parallel. IMDS See Attachment 1 of DHOG-7S3BCU Page 3 of 7

Part Specific Technical Information Note: The following information and data should be considered representative or typical only and should not be used for specification purposes.

4 Part Specific Technical Information Note: The following information and data should be considered representative or typical only and should not be used for specification purposes. Picture Stem 3M Dual Lock Pop-In Parts Stem Area Target Hole Size (Range) Post length Panel SJ x 26 Ø 8.2 ( ) E SJ x 26 Ø 8.2 ( ) E SJ x 26 Ø 10 ( ) E SJ x x 10** E 3M Dual Lock Pop-In Parts For Key Hole Slots Picture Stem Stem Area Target Hole Size Post length Panel (Range) SJ x 20 Key Hole Slot*** ( ) E SJ x 20 Key Hole Slot*** ( ) E **Recommended hole design for SJ3827: ***Recommended key hole slot design for SJ3221 and SJ3731: Attachment 1 of DHOG-7S3BCU Page 4 of 7

Picture (Type) 3M Dual Lock Die-Cut Parts Stem Stem Area Target Hole Size Number of holes Diam. mm SJ 3250 20.5 x 28 Ø 4.22 1 -- C SJ 3252 38.1 x 38.1 Ø 4.22 2 (25.0 mm hole spacing) -- C SJ 3261 38.

5 Picture (Type) 3M Dual Lock Die-Cut Parts Stem Stem Area Target Hole Size Number of holes Diam. mm SJ x 28 Ø C SJ x 38.1 Ø (25.0 mm hole spacing) -- C SJ x 38.1 Ø (25.0 mm hole spacing) -- C SJ x 38.1 Ø (25.0 mm hole spacing) -- B SJ 3755 (Circle Washer) 250 Approx 5.87 cm 2 Ø F SJ 3762 (Circle Washer) Approx 5.87 cm 2 Ø D SJ 3763 (Circle Washer) Approx 2.84 cm 2 Ø D Picture Stem 3M Dual Lock Slide-In Part Outside Dimension Fastener Size mm Min. Flange Width mm Flange / Total Part SJ x x / 5.10 D Attachment 1 of DHOG-7S3BCU Page 5 of 7

6 Chart This is a stack-up thickness guide to assist you select the 3M Dual Lock Reclosable Fastener products to meet your gap needs. Find the product thickness codes of the two parts you want to combine in the previous selection charts. Then find the matching s along the two axis of the chart below and follow the row / column to the point where they intersect. Typical Stack-Up Engaged Combination +/-10% # 1 Engaged Mode # 2 A B C D E F (Dual Lock Plain Material) A (Dual Lock Tension Plain Material) Compression B Tension Compression C Tension Compression D Tension Compression E Tension Compression F Tension 11.0 Compression 10.4 Source: 3M Dual Lock Piece Parts Reclosable Fasteners Technical Data and Design Guide (U.S. 02/2007) For engaged height combinations with 3M Dual Lock fasteners with 3M Acrylic Foam Tapes, just add the tape thickness to the stack-up height of the chosen piece part combined with plain material (code A). Tension mode: Compression mode: Attachment 1 of DHOG-7S3BCU Page 6 of 7

7 Design Considerations Whenever possible, design one side of the Dual Lock reclosable fasteners to be larger than the mating side. This will allow for variability or mismatch in Dual Lock reclosable fastener alignment positions, and ensure 100% fastening area contact. Another approach would be to design two rectangular shaped fasteners so that they can be engaged in a cross-web / perpedicular pattern. Dual Lock reclosable fastener strength is proportional to the fastening contact area. Dual Lock reclosable fastener disengagement strength / performance is strongest in direct tensile. Cleavage mode disengagement greatly reduces fastening strength. Pop-In Parts Description 3M TM Dual Lock TM reclosable fasteners pop-in parts attach without the use of pressure sensitive adhesive, and come with a variety of bases that can be inserted or slid into holes of precise dimension. They are easy to install and require no special equipment or skills. Pop-in s are a good alternative to pressure sensitive adhesive backed 3M Dual Lock reclosable fasteners, where there are constraints related to the surface characteristics, material, type, temperature and dwell time. Selection of the pop-in part should be made based on the following considerations: Target disengagement strength for part / application. Pop-In pull-out strength must exceed the 3M Dual Lock reclosable fasteners target disengagement strength for the combination (recommended >150% of disengagement force). Sheet metal or panel thickness range. Hole size. Gap behind the sheet metal for post protrusion. Burr or die punched hole ( the burr on a hole affects the effective panel thickness which will have an effect on the performance of the pop-in parts.) Stack-up height can be increased for tree style pop-ins with the addition of a foam washer. Important Notice All statements, technical information and recommendations herein are based on tests we believe to be reliable, but the accuracy or completeness thereof is not guaranteed. Please ensure before using our product that it is suitable for your intended use. All questions of liability relating to this product are governed by the Terms of Sale subject, where applicable, to the prevailing law. 3M Deutschland GmbH Automotive Laboratory Carl-Schurz-Strasse-1 Dual Lock piece parts E 04/MSK D Neuss Date: 11/ 2012 Tel. (+49) Revision: 4 Fax: (+49) Page 7 of 7

Automotive. 3M Dual Lock Reclosable Fasteners with Pressure Sensitive Adhesive

Automotive. 3M Dual Lock Reclosable Fasteners with Pressure Sensitive Adhesive 4 Automotive Technical Data Sheet November 2012 3M Dual Lock Reclosable Fasteners with Pressure Sensitive Adhesive General Description 3M Dual Lock Reclosable Fastening Systems are positive-locking, blind