Double-sided adhesive tapes

A double-sided adhesive tape has a sticky surface on each of its sides. It allows for the assembly of two materials while generally remaining invisible after application. It is used for the fixing of components, mounting, industrial assembly, signage, leather goods, packaging, and many applications requiring a clean finish.

The choice mainly depends on the materials to be assembled, their roughness, the weight of the elements, and the desired duration of adhesion. It is also important to consider temperature, humidity, vibrations, exposure to UV or chemicals, as well as the thickness available between the two surfaces.

A thin double-sided adhesive tape is suitable for flat surfaces and assemblies requiring a low thickness. A foam tape is thicker and can compensate for certain irregularities, distribute stresses, and absorb vibrations. PE foams are often used for general mounting, while acrylic foams meet more demanding adhesion needs.

A transfer tape consists essentially of an adhesive mass deposited on a liner, without a permanent central backing. It allows for a very fine and flexible adhesion. A double-sided tape with backing includes an intermediate material, such as polyester, non-woven, PVC, or foam, which provides additional thickness, stability, or resistance.

Permanent tape is designed to create a durable bond that is difficult to remove. A repositionable adhesive allows for adjustment of the piece's position during application before the adhesion fully develops. Removable double-sided tape is intended to be removed more easily when the assembly needs to remain temporary or detachable.

Surfaces must be clean, dry and free from dust, grease or residues. The tape should be applied without stretching, then pressed down evenly to achieve consistent contact. It is advisable to avoid touching the adhesive sides and to wait for the adhesion to develop before subjecting the assembly to significant stress.

A test should be carried out on the actual materials used, under conditions representative of production. This allows for checking adhesion, mechanical strength, resistance to stress and the quality of removal when necessary. DERFI can study the application and propose a thin tape, a transfer, a foam, a repositionable solution or suitable pre-cut adhesive parts.