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Components of Duct Foil Tape I

2016-08-30

Duct foil tapes utilize a metal-foil backing which contributes to the tape's malleable, conductive, and rugged characteristics. This type of adhesive tape is properly employed in sealing, shielding, grounding, and resistance applications. Duct foil tapes cling to surfaces via a durable, pressure sensitive adhesive. These tapes find significance in the aerospace, metal finishing, appliance, and automotive industries.

Duct foil tapes are primarily for instances of electric or thermal conducting and shielding. Shielding tape with a conductive adhesive is used for electromagnetic interference shielding, grounding, and static charge. Duct foil tapes most commonly commission an acrylic adhesive that can be conductive or non-conductive. Their foil carriers offer UV protection, and are typically temperature resistant as well.

While duct foil tapes have most of the aforementioned qualities in common, the carrier material largely determines its undertaking. Carrier materials are recounted in the section below. Aluminum tape is common for HVAC sealing and repair, while copper tape is more appropriate for electrical shielding.

Electrically conductive adhesives typically suspend silver, graphite, or copper in the adhesive, and can be responsible for 80% of the adhesive's mass.

Acrylic - Acrylic-based adhesives reach their maximum adhesion almost immediately upon application, have adequate resistance, require no preparation, and have good sheer and peel strength. In duct foil tape applications, the acrylic adhesive can be made conductive and non-conductive.

Epoxy - Epoxy resins are adhesives that exhibit high strength and low shrinkage during curing. Epoxies are known for their toughness and resistance to chemical and environmental damage.

Pressure Sensitive - Pressure sensitive adhesives (PSAs) or contact adhesives are aggressively and permanently tacky at room temperature in dry (solvent free) form. They adhere firmly to a variety of dissimilar surfaces upon contact, requiring only the application of finger or hand pressure. PSAs do not require water, solvent or heat activation in order to exert a strong adhesive force on materials such as paper, plastic, glass, wood, cement and metal. PSAs have a sufficiently cohesive holding and elastic nature so that despite their aggressive tackiness they can be manipulated by hand and removed from smooth surfaces without leaving a residue. This is the most common adhesive of electrical tapes and as such, is not usually specified on product packaging.

Rubber - Adhesives with a rubber-based chemical structure have highly flexible bonds that are based on butadiene-styrene, butyl, polyisobutylene, or nitrile compounds. These rubber bonds should be resistant to deterioration in the presence of petroleum or other solvents.

Silicone - Silicone adhesives and sealants have a high degree of flexibility and very high temperature resistance (600 °F). While available as a pressure sensitive application, some silicone adhesives may require ventilation, or UV or EB radiation to cure. Most notably, duct foil tape silicones can offer thermally-conductive silicone adhesives.