Tape Technologies

PSA Tape Components

PSA tapes can consist of four basic components:

  • Adhesive - Component that provides adhesion to the substrate.
  • Carrier - Component on which the adhesive coating is  applied.
  • Release Coating - Applied to the release liner and cured. Allows adhesive to separate from the liner without contaminating the adhesive. This component plays a major part in the  functionality of a finished PSA product.
  • (Release Coated) Liner - Component plays a crucial role in the production, processing and application of the PSA.

Adhesive Chemistries and Characteristics

Each adhesive has unique applications. Below is an Avery Dennison reference guide to basic adhesive chemistries and a summary of typical performance characteristics.

Adhesive Chemistries Price Adhesion Low Surface Energy Bonding Tack Shear Temperature Resistance Humidity Resistance Solvent/
Chemical Resistance
UV Resistance
Rubber
Based
L H H H MH LM L L L
UHA
Rubber
Based
MH H MH MH MH M M M LM
Acrylic
Based
M M LM LM MH M H MH MH
Modified Acrylic
Based
MH MH MH M M LM M M M
UHA
Acrylic
Based
MH MH L LM H MH MH H MH
HPA
Acrylic
Based
MH M LM M H MH MH H MH
Silicone
Based
H LM M LM H H H H H
AFB
Based
H H L MH MH MH MH MH MH

L - Low          LM - Low/Medium          M - Medium         MH - Medium/High          H - High

Carrier

Typical carrier materials include tissue, nonwoven, polypropylene, polyester, scrim, and foam. Below is a summary of carriers and their characteristics.

Carrier
Characteristics
Convertibility
Tissue
Increased tape caliper, tearable
M
Nonwoven
Better internal strength compared to tissue, water resistant
MH
Polypropylene
More flexible compared to polyester, water barrier
H
Polyester
Chemical barrier, improved internal strength versus polypropylene
H
Scrim
Reinforced substrate (no stretch)
M
Foam
Used for gap filling, mounting
H

L - Low          LM - Low/Medium          M - Medium         MH - Medium/High          H - High

Liners

Avery Dennison offers paper and film release liners in a number of different constructions and weights to meet various process requirements.

Liner Type High Tensile Strength Humidity Resistance Rotary Die Cutting Kiss Cuting
Paper
Glassine     X X
Polyethylene Protected Paper(PPP) X X X  
Poly-coated Kraft X X X  
Densified Kraft X X X X
Clay-coated Kraft   X X X
Film
Polyester (PET) X X X X
Polypropylene (OPP) X X    
Polyethylene (LDPE and HDPE) X X    

PSA Constructions

The various PSA tape components are combined and supplied in  the following basic constructions:

Selecting-the-right-tape-TRANSFER-TAPE-220x140

Transfer Tape

A film of unsupported adhesive is coated directly onto a siliconized  release liner. The release liner is coated with silicone on both sides to ensure that the tape unwinds easily and can be laminated to various substrates.

Double linered transfer tape constructions may be offered.

  • Offers superior conformability
  • Ideal for nameplate mounting and foam bonding
Selecting-the-right-tape-SINGLE-COATED-220x140

Single Coated

The adhesive is coated on one side of a carrier. A release liner coated on one side with silicone protects the adhesive.

  • Potential label stock
  • Foil insulation tapes
Selecting-the-right-tape-DOUBLE-COATED-220x140

Double Coated

The adhesive is coated on both sides of a carrier material. This construction is provided on a liner coated on both sides with silicone. Double linered, double coated constructions may be offered.

  • Offers improved internal strength
  • Greater dimensional stability, easier converting
  • Easily slit into narrow rolls
  • Adds support to otherwise stretchy materials
Selecting-the-right-tape-SELF-WOUND-220x140

Selfwound

The adhesive is coated on one side of a carrier. The other side of the carrier is generally coated with silicone to enable the tape to unwind easily.

  • Provides wrap around sealing
  • Acts as closure system
  • Potential label stock
  • Can provide moisture vapor barrier
Selecting-the-right-tape-HEAT-ACTIVATED-220x140

Heat-Activated

A heat-activated film laminated to a pressure- sensitive adhesive on a release liner coated on both sides with silicone.

  • Designed for difficult to bond materials
  • Ideal for shipping pads, non-slip step pads and certain sound damping materials