ASK A 3M EXPERT April, 2014 3M™ Loop Fastener SJ3571 Product Description 3M™ Hook and Loop Fasteners oer advanced closure alternatives to zippers, screws, snaps, hooks and more. They oer greater design exibility, faster product assembly, smoother and cleaner exterior surfaces and improved product performance in many applications. 3M hook and loop fasteners consist of hooks and loops which engage to form a quick fastening attachment. Simply pull the strips apart by hand to disengage. Product Features The woven nylon hook has exible, self-supporting inverted j-hooks protruding up from the backing with approximately 300 hooks per square inch (46 hooks/square cm). The woven nylon loop has thousands of soft, pliable napped loops protruding above the backing, providing for thousands of openings and closings (cycles). Both the hook and loop are preshrunk to insure maximum dimensional stability and atness. Standard colors available are black, white and beige, with several custom colors available with extended delivery times and additional costs. SJ3571 is coated with high performance acrylic pressure sensitive adhesive which has high temperature resistance and resistant to many environmental and chemical conditions. Commonly paired with 3M™ Hook Fastener SJ3572, this loop fastener can also engage with other 3M™ Hook Fasteners.

3M™ Loop Fastener SJ3571 Technical Information Note The following technical information and data should be considered representative or typical only and should not be used for specication purposes. Typical Physical Properties Thickness Test Condition 3.2 mm 125 mil Unmated without liner 0.33 mm 140 mil Mated without liner Property: Thickness notes: Using 1/2" pressure foot with 34 gram weight Property Values Material Loop- Woven Nylon Backing High Performance Acrylic PSA Liner Polyolen with embossed 3M logo Liner Thickness 0.1 mm 4 mil Liner Color Clear Weight 0.062 g/cm² 0.014 oz/in² Typical Performance Characteristics Property Values Substrate Notes Dynamic Tensile 7.6 N/cm² 11 lb/in² Nylon Hook to Nylon Run at 12 inches per minute Loop Dynamic Shear 15.2 N/cm² 22 lb/in² Nylon Hook to Nylon Run at 12 inches per minute Loop Cleavage Strength 13.1 g/cm width 7.5 lb/in width Nylon Hook to Nylon Loop T-Peel Adhesion 3.5 g/cm width 2 lb/in width Nylon Hook to Nylon Run at 12 inches per minute Loop 90° Peel Adhesion 3.9 g/cm width 2.2 lb/in width Nylon Hook to Nylon Run at 12 inches per minute Loop Cycle Life 5000 Nylon Hook to Nylon Number of closures before losing 50% of original Loop strength

3M™ Loop Fastener SJ3571 Typical Performance Characteristics (continued) Product Performance: Additional Information notes: This guide should assist you in determining which product will adhere best to your substrate for.

3M™ Loop Fastener SJ3571 Handling/Application Information Directions for Use Attachment Techniques The following information is intended to assist the designer considering the use of 3M hook and loop fasteners. System product performance depends upon a number of factors, including the fastener (material, adhesive and area), application method, surface characteristics (material, texture and cleanliness), environmental conditions (moisture, ultraviolet and temperature exposure) and the time it is expected to support a given load. Because many of these factors are uniquely within the user’s knowledge and control, it is required that the user evaluate 3M products to determine whether they are t for a particular purpose and are suitable for the user’s substrates, method of application and desired end use. Rounding the corners, slightly recessing the product into the substrate, or providing raised edges around the Reclosable fastener can reduce the possibility of edge lifting and improve the overall appearance of the fastener on the nished product. Mechanically securing the corners of the fastener with rivets, staples, screws, etc. may also reduce the possibility of edge lifting, but may reduce the closure performance. The two most common techniques for attaching these 3M hook and loop fasteners to various surfaces are summarized below. Pressure Sensitive Adhesive Attachment: The use of pressure sensitive adhesives eliminates or reduces the need for sewing, solvent activation, dielectric or ultrasonic bonding or bulk adhesive bonding. This can result in simplicity, improved safety and lower installation costs. Pressure sensitive adhesive products can be applied manually or automatically using a variety of equipment choices. Contact your 3M Sales Representative to discuss automated equipment options. Surface Preparation: Highly textured surfaces may reduce the ultimate adhesion levels and care should be given to minimize the surface texture or roughness. Adhesive backed fasteners should be applied to surfaces that are clean, dry and free of oil, grease, dust, mold release agents or surface contaminants that could reduce the adhesion. It is recommended to remove any surface contaminants that may reduce adhesion by using a method suited for the type and quantity of surface contaminants present. Isopropal alcohol is a good general use solvent for cleaning contaminants from surfaces for example. In exceptional cases, especially when removing silicone mold release agents or on rough, porous surfaces, it may be necessary to lightly abrade the surface, use an adhesion promoter, or surface sealer to optimize the adhesive bond to the substrate. The selection of abrasion, priming or sealing methods will depend upon the substrates and the environmental conditions the product will be exposed to during use. Attachment Procedure: To obtain optimum bond to any surface, both the fasteners and the target surfaces should have equilibrated for a minimum of one hour at temperatures between 68°F (20°C) to 100°F (38°C) before application. The liner protecting the adhesive is removed and preferably without touching the adhesive, the fastener is applied to the substrate. Exposure of the adhesive to ambient conditions without the protective liner, before applying to the surface, should be minimized as initial adhesive tack may decrease. Flexible materials should be lying on a hard at surface so as to permit uniform adhesive contact with the surface. Use of a rubber hand roller, press platen or similar device is recommended to ensure full adhesive contact or wet- out with the substrate surface. Approximately 4.5 pounds of force per square inch, (310 grams per square centimeter) is recommended to increase adhesive contact, improving bond strength. For all adhesive applications, it is important to ensure that the edges are rolled down to reduce the chance of edge lifting. Plain backed The plain backed 3M hook and loop fasteners are most commonly sewn into their applications. Liquid or hot melt adhesives and staples are other forms of attachment that can be utilized. Sewing: Although the selvedge edge was initially developed for stitching on, customers often nd that they get better anchorage when stitching through the 3M hook and loop portions of the fastener – this may be application dependant. The type of thread and stitch type is also best determined based on individual application, however, the fastener should be stitched on all edges for the best seam strength. Typically, special machine adjustments are not necessary when using our 3M hook and loop fasteners Storage and Shelf Life Shelf Life when stored in original packaging at 72°F (22°C) and 50% RH is 24 months.

3M™ Loop Fastener SJ3571 Family Group SJ3401 SJ3522 SJ3523 SJ3526N SJ3527N SJ3402 SJ3531SJ3571 SJ3572 SJ3532N SJ3533N SJ3530 Thickness (mm) 2 2.4 3.2 2.4 3.2 2 3.2 3.2 2.4 2.03 3.05 2.4 Test Condition: Unmated without liner Thickness (mm) 3.1 0.33 0.33 0.33 0.33 3.1 0.33 0.33 0.33 3.3 3.3 0.33 Test Condition: Mated without liner Material Loop- Hook- Loop- Hook- Loop- Hook- Loop Loop- Hook- Hook- Loop- Hook Woven Woven Woven Woven Woven Woven - Woven Woven Woven Woven - Nylon Nylon Nylon Nylon Nylon Nylon Wov Nylon Nylon Nylon Nylon Wov en en Nylo Nylo n n Backing No Plasticiz Plasticiz High High No Gene High High Rubber Rubber Gene Adhesi er er Performan Performan Adhesi ral Perfor Perfor based PSA based PSA ral ve Sew resistan resistan ce rubber ce rubber ve Purp mance mance Purp on t acrylic t acrylic based PSA based PSA Sew ose Acrylic Acrylic ose PSA PSA on rubb PSA PSA rubb er er base base d d PSA PSA Liner None Non Non Polyethyle Polyethyle None Polyp Polyole Polyole White White Polyp printed printed ne with ne with ropyl n with n with Polypropyle Polypropyle ropyl polyole polyole red red ene emboss emboss ne ne ene n lm n lm printing printing ed 3M ed 3M logo logo Liner Thickness (mm) 0.089 0.089 0.08 0.08 0.08 0.1 0.1 0.08 0.08 0.08 Liner Color Clear Clear White White Whit Clear Clear Whit e e References 1. 3m.com Product Page Url: https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Loop-Fastener-SJ3571?N=5002385+3293241225&rt=rud 2. Safety Data Sheet Url: https://www.3m.com/3M/en_US/company-us/SDS-search/results/?gsaAction=msdsSRA&msdsLocale=en_US&co=ptn&q=SJ3571 ISO Statement This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001: 2000 and ISO/TS 16949:2002 standards. Technical Information The technical information, recommendations and other statements contained in this document are based upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed.

3M™ Loop Fastener SJ3571 Product Use Many factors beyond 3M’s control and uniquely within user’s knowledge and control can aect the use and performance of a 3M product in a particular application. Given the variety of factors that can aect the use and performance of a 3M product, user is solely responsible for evaluating the 3M product and determining whether it is t for a particular purpose and suitable for user’s method of application. Warranty, Limited Remedy, and Disclaimer Unless an additional warranty is specically stated on the applicable 3M product packaging or product literature, 3M warrants that each 3M product meets the applicable 3M product specication at the time 3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price. Limitation of Liability Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability. Industrial Adhesives and Tapes Division Please recycle. The brands listed above are trademarks of 3M. 3M Center © 3M 2018. All Rights Reserved. St. Paul, MN 55144-1000 800-362-3550 www.3m.com