The adhesive layer determines how tape makes contact with a surface and how the bond behaves. The adhesive name provides an initial indication, but choosing the right tape means considering the adhesive, backing, substrate and use together.
Pressure-sensitive adhesive
Many tapes use a pressure-sensitive adhesive. The adhesive bonds when the tape is applied to the substrate and pressed down. Firm pressure ensures contact with the surface; adhesion then continues to develop.
The extent to which this happens varies according to the adhesive formulation and application. A clean substrate, a suitable application temperature and sufficient pressure help ensure even application.
Acrylic adhesive
Acrylic adhesives are a versatile family used in a wide range of tape constructions. Acrylic formulations are often chosen when resistance to ageing and UV light is important.
Properties vary by formulation. Some acrylic tapes develop their adhesion gradually. Acrylic adhesives are suitable for applications including packaging, mounting and protective tapes when the product construction matches the application.
Rubber adhesive
Rubber adhesives include natural and synthetic rubber formulations. They are often known for their fast initial adhesion and high tack on suitable surfaces.
Resistance to heat, UV light, ageing, oil and plasticisers depends on the specific formulation. Rubber adhesives are used in packaging, mounting and duct tapes, among other applications.
Hot-melt adhesive
A hot-melt adhesive is applied in a heated state during production. In packaging tape, hot-melt adhesives are popular for their rapid bond formation and efficient processing.
For machine application, both the tape specification and the conditions on the packaging line matter. Carton type, line speed, roll dimensions and machine settings all influence the sealing result.
Solvent-based adhesive systems
In a solvent-based adhesive system, a solvent is used during production to apply the adhesive. The final properties result from the adhesive formulation and the complete tape construction. The designation alone therefore does not determine how the tape performs on every substrate.
Silicone adhesive
Silicone adhesives are used in specialist tapes for applications with specific temperature or surface requirements. The combination of adhesive, backing and conditions of use determines their suitability.
Water-activated adhesive
Gummed tape becomes adhesive when its adhesive layer is activated with water. It is often used to seal cardboard boxes. Depending on the construction, the adhesive can bond to the paper fibres. A dispenser helps moisten and apply the tape evenly.
Paper tape is not necessarily gummed: paper can also have a pressure-sensitive adhesive layer.
Low-tack and specialist adhesive layers
Low-tack tape has a lower level of adhesion than a comparable standard version. It is intended for applications where the tape needs to stay securely in place and then be removed in a controlled manner. The substrate, dwell time and conditions also influence the removal result.
For masking tape and other specialist applications, the combination of paint, material, application timing and removal timing is decisive. A trial on the actual surface quickly helps establish a suitable working method.
Which adhesive is right for your tape?
Van Loenhout Products advises on adhesive types in relation to the backing, substrate and application method. This helps you choose a tape suited to your sealing, mounting or protection requirements.
