3M Hook Fastener SJ3402 Datasheet 3M Hook Fastener SJ3402

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  • Description for 3M Hook Fastener SJ3402

    Hook and Loop Fasteners oer advanced closure alternatives to zippers, screws, snaps, hooks and more.

    *See Terms of Use Below

    Brand Bumpon
    Application Type Bond
    1 Part or 2 Part 1 Part
    Material Form Bumpons
    Substrate Nylon Hook to Nylon Loop
    Manufacturer 3M
    Cure Method Pressure Sensitive
    Color Black, Beige, White
    Durability Very durable
    Key Specifications CID (United States Government Commercial Item Description): CID A-A-55126A: Type II, Class 1, Mil-Spec (United States Military Standard): F-21840: MIL-F-21840, Type IA, II and III Class 3; meet the physical requirements of CID A-A-55126A, Type II, Class 1.
  • Technical Data for 3M Hook Fastener SJ3402

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Bumpons
    • Substrate
      • Nylon - Nylon Hook to Nylon Loop
    • Cure Method
      • Pressure Sensitive (min) - Pressure Sensitive
    • Color
      • Black
      • Brown - Beige
      • White
    • Key Specifications
      • CID (United States Government Commercial Item Description): CID A-A-55126A: Type II, Class 1
      • Mil-Spec (United States Military Standard): F-21840: Type IA, II and III Class 3 - MIL-F-21840, Type IA, II and III Class 3; meet the physical requirements of CID A-A-55126A, Type II, Class 1.
    • Brand
      • Bumpon
    Specifications
    Bond Strength
    Peel Strength (piw) 3.5 (g/cm), 3.9 (g/cm) Test Method
    Shear Strength (psi) 10 (pounds force/square inch), 10 Test Method
    Cleavage Strength (psi) 0 13.1 (g/cm) Test Method
    Tensile Strength (psi) 8, 5 Test Method
    Tape Properties
    Tape Backing Woven nylon
    Material Resistance
    Dimensional Stability (%) Maximum
    Hardness
    Durability Very durable
    Flexibility Fexible
    Business Information
    Shelf Life Details Shelf Life when stored in original packaging at 72°F (22°C) and 50% RH is 24 months.
    Shelf Life Temperature (°F) 72
    Shelf Life (mon) 24
  • Best Practices for 3M Hook Fastener SJ3402

    *See Terms of Use Below

    1. 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.

    2. Application

      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

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Cleavage Strength Test Methods
Cleavage Strength Substrate Test Method
0 psi 13.1 (g/cm) Nylon Hook to Nylon Loop width
Peel Strength Test Methods
Peel Strength Type Substrate Test Method
3.5 (g/cm) T-Peel Adhesion Nylon Hook to Nylon Loop Run at 12 inches per minute, width
3.9 (g/cm) 90° Peel Adhesion Nylon Hook to Nylon Loop Run at 12 inches per minute; width
Tensile Strength Test Methods
Tensile Strength Type Substrate Test Method
8 psi Dynamic Tensile Strength
5 psi Dynamic Tensile Strength Nylon Hook to Nylon Loop Run at 12 inches per minute
Shear Strength Test Methods
Shear Strength Type Substrate Test Method
10 (pounds force/square inch) Dynamic shear strength ASTM D5169
10 psi Dynamic shear strength Nylon Hook to Nylon Loop Run at 12 inches per minute