3M SJ3533N

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Description for 3M SJ3533N

Scotchmate Reclosable Fasteners offer advanced closure alternatives to zippers, screws, snaps, hooks, bolts and more. They offer greater design flexibility, faster product assembly, smoother and cleaner exterior surfaces and improved product performance in many applications.

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Brand	Bumpon
Application Type	Bond
1 Part or 2 Part	1-Part
Material Form	Bumpons
Substrate	Acrylic, Fabrics, Glass, Bare and painted Metal, Nylon, Paper, Plastics, Polycarbonate, Polyester, Polypropylene, Sealed Wood, Polystyrene, Polyethylene, Rigid Vinyl, Foam, Low surface energy adherends, ABS, Cardboard, Textured plastics, Polyethylene
Industry	Medical Braces, Attaching Exhibit and Display Graphics, Attaching Exhibit and Display Graphics
Manufacturer	3M
Chemistry	Rubber Based PSA, Nylon 6
Cure Method	Pressure-Sensitive
Color	Black, Beige, White
Key Specifications	Mil-Spec (United States Military Standard): F-21840: MIL-F-21840, Type II and III, Class 1

Best Practices for 3M SJ3533N

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Technical Data for 3M SJ3533N

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Overview

Application Type
- Adhesive - Bond
1 Part or 2 Part
- 1-Part
Material Form
- Bumpons
Substrate
- Foam
- Low Surface Energy - Low surface energy adherends
- Glass
- Metal - Bare and painted Metal
- Plastic - Plastics, Textured plastics
- Acrylic (PMMA) - Acrylic
- Nylon
- Polycarbonate
- Polypropylene
- Polystyrene (PS) - Polystyrene
- Polyethylene (LDPE, HDPE) - Polyethylene, Polyethylene
- Vinyl - Rigid Vinyl
- ABS
- Wood - Sealed Wood
- Fabric - Fabrics
- Paper - Cardboard
- Polyester
- Other - Rigid Substrates, CARC Paint, Difficult to adhere to surfaces
Industry
- Displays - Attaching Exhibit and Display Graphics
- Industrial
- Printing and Graphics - Attaching Exhibit and Display Graphics
- Medical - Medical Braces
- Other - Anti-scratch surface, Attaching accessories and equipment, Vibration and sound dampening control, Indoor applications, Foam articles
Chemistry
- Nylon - Nylon 6
- Other - Rubber Based PSA
Application Method
- Contact
Cure Method
- Pressure Sensitive (min) - Pressure-Sensitive
Color
- Black
- Brown - Beige
- White
Key Specifications
- Mil-Spec (United States Military Standard) : F-21840 : Type II and III, Class 1 - MIL-F-21840, Type II and III, Class 1
Brand
- Bumpon

Specifications

Bond Strength

Peel Strength (piw)	2.6 (lb./inch)	Test Method
Shear Strength (psi)	4.8 (lbsF/sq inch), 18 (lbsF/sq inch), 10	Test Method
Cleavage Strength (psi)	6.0 (lbsF/sq inch)	Test Method
Tensile Strength (psi)	7.5 (lbF/sq. in), 10 (lbF/sq. in), 8	Test Method

Business Information

Shelf Life Details	Shelf Life when stored in original packaging at 72°F (22°C) and 50% RH
Shelf Life Temperature (°F)	72
Shelf Life Type	From date of manufacture
Shelf Life (mon)	18

Not Good For

Don't Use With	Flexible vinyl, Plasticized adherends

Best Practices for 3M SJ3533N

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1. Design
  
  As a general rule, four square inches of fastener area per pound (57.3 square centimeters per kilogram) of static load to be supported is suggested as a starting point for evaluation. More or less area may be needed depending on specific conditions or end use applications
  
  Rounding the corners, slightly recessing the product into the adherend 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 finished 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.
2. 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.
3. 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 flat 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 wetout 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 find 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
4. Curing
  
  Parts with properly chosen and applied pressure sensitive adhesive reclosable fasteners can be handled immediately. As the adhesive further wets-out the adherend surface, adhesive bond strength increases after application with time, pressure and/or temperature. Once attached to the adherend, a 1-hour minimum dwell time is recommended before applying a load or disengaging mated Scotchmate reclosable fastener pieces. This dwell time is important for achieving a firm adhesive bond before applying a load or disengaging. The adhesive on 3M™ Scotchmate™ Reclosable Fasteners SJ3532N and SJ3533N family of products achieves approximately 50% of the ultimate bond strength within 20 minutes, 90% after 1 hour and the ultimate bond strength of properly applied fasteners is obtained within 24 hours at 72°F (22°C) and 50% relative humidity. Primers or adhesion promoters may reduce the time required to achieve the ultimate bond strength.
Comparable Materials for 3M SJ3533N

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