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	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	HL	MH	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 Cutting
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:

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

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

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

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

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

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