Rubber
tape is a Ethylene Propylene Rubber (EPR) based high-insulating voltage
tape. It is used for electrical insulation, water sealing and mechanical
padding and shaping.
Rubber tape is a splicing compound. The tape is applied to the splice
with a light tension so that each layer presses tightly against the one
beneath it. This pressure causes the rubber tape to blend into a solid
mass.
In roll form, there is a layer of paper or treated cloth between each
layer of rubber tape. This layer prevents the rubber from fusing while
still on the roll. The paper or cloth is peeled off and discarded before
the tape is applied to the splice.
Types
Rubber tapes are of various forms depending on various industrial and
commercial applications.
- Natural rubber tape: provides superior
adhesion in extreme temperatures. It is not affected by humidity and
dampness. It yellows with age.
- Cohesive rubber tape: consists of one soft,
uncured layer bonded to a cured, abrasion-resistant layer. Unique
separator allows controlled removal at the user’s discretion.
An airtight, waterproof, gas-tight seal is formed when the uncured
layer is bonded to itself. It is used as a covering for
communication and control cables.
- Double rubber tape: non-adhesive,
self-bonding communication tape used for critical sealing and
rejacketing. One layer of uncured compound permanently fused to an
abrasion resistant layer of cured rubber.
- Self-amalgamating rubber: forms a solid
piece of rubber. As the rubber cures and bonds it shrinks 3% which
makes the tape excellent for forming watertight and air tight seals
on most irregular surfaces.
- Butyl rubber tapes: these pliable, tacky
adhesive and sealing tapes adhere to all metals, glass, plastics,
concrete and porous surfaces. These tapes come in black or white.
- Rubber mastic tape: combines the higher
voltage insulating capabilities of rubber tapes with the excellent
moisture seal and padding of mastic. This tape is excellent for
stretching and conforming in tight places.
- Hot melt rubber tape: features excellent
shear adhesion to prevent flagging, and outstanding tear, burst,
impact and transverse strength. It also provides good quick stick
and controlled unwind properties.
- Rubber preformed tapes: hydrocarbon rubber
based sealant can be formulated as hot melts, solvent release or
preformed tapes using polybutenes, butyl rubber or polyisobutylene.
Features
Rubber tape provides a fast build of insulating materials and water
seals on irregular joints and connections. It completely covers the
entire joint or connection and makes a gasket –type seal onto the
existing cable jacket. It prevents water seepage, even on very slick
materials such as high-density polypropylene. Rubber tapes are typically
overwrapped with vinyl tape, which forces the rubber flow and provides a
slick abrasion-resistant outer surface. Most rubber tapes use a liner to
prevent the tape layers from bonding or fusing in place on the roll. The
liner is removed during application.
Applications
Some rubber tapes are made for special applications. These types are
semi conducting and will pass electrical current, which presents a shock
hazard. Also used for swimming costumes and pants edges.
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