When to Use Transfer Adhesives Versus Double Coated Tapes

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I often get a bewildered look when I talk about selecting a transfer adhesive versus a double coated tape. Most people aren’t familiar with the differences even though in the most basic way they both join or bond two surfaces together. The purpose of this blog post is to help you understand the important distinctions between theses two forms of tape and why to choose one over the other.

The Basics

A transfer adhesive is a coating of pressure-sensitive adhesive on a release liner. The majority of transfer tapes range in thickness from 1-5 mils although there are some specialty products that fall outside this range. There are also reinforced transfer adhesive versions that use fiberglass stands or thin, open scrims to help reinforce the adhesive making them more of a hybrid. By contrast, a double coated tape has a coating of pressure-sensitive adhesive coated on both sides of a carrier. This carrier is often a film (polyester, polypropylene, UPVC) but could be also be paper or tissue. transfer adhesives vs double coated tape The carrier can perform a variety of functions in the tape such as:
  • Stabilizing the adhesive
  • Allows different  adhesives or thicknesses  to be used on each side
  • Adds thickness and dimensional stability
  • Improves handling
  • Can provide a barrier between the adhesive layers

Overall Comparison

Double Coated Tape / Transfer Adhesive

Typically thicker (3-10 mils) / Typically thinner (1-5 mils) Less conformable / More conformable Easier to dispense / More difficult to dispense Can be spooled / Difficult to spool unless reinforced Reinforces substrate / Does not reinforce substrate

Part Geometry

The shape of the part to which the tape will be applied plays a significant role in choosing a transfer adhesive or a double coated tape. When you want to bend the tape around sharp edges or compound curves, transfer adhesives have the advantage. The lack of a carrier enables the adhesive layer to more really conform and remain adhered to the surface provided the right adhesive type and thickness have been selected. A carrier can often induce forces into the bond line that cause the tape to “flag” or lift as it tries to go back to equilibrium. part geometry of transfer adhesives When you’re bonding to a flat surface or you need increased support for another layer such as open cell urethane foam, the double coated tape will give you that extra support and handling capability. Double coated tapes and transfer adhesives are the workhorses of the bonding and assembly world. Knowing when to choose one versus the other is important and can help improve the chances for success in your application. Have questions or want more information? Call Tom Brown, Inc. today!
Rick Alexander

About the Author

Rick Alexander is the National Sales Manager for Tom Brown, Inc. His early experience was in R&D, product management, and sales management for both Main Tape and Adhesives Research, Inc. Rick brings over 40 years of pressure-sensitive tape experience and Tom Brown’s world class converting capabilities to help solve customer bonding, assembly, and sealing challenges.