BLF-77 tape is a fire-retardant arc proofing tape designed to protect all types of electrical cables. Its unique formulation allows the manufacture of an unsupported elastomer that expands to provide a thick char buildup. This insulating shield protects the cables and accessories from fault arc generated heat and flames. All adjacent wrapped cables and accessories are protected when exposed to fault arcs until limiting devices can interrupt the faulted circuit. Because BLF-77 tape is unsupported, it is extremely conformable. Installers can wrap cables and irregularly-shaped accessories easier and more rapidly. This exceptional conformability enables better product control while wrapping, and more uniform coverage. Also, the tape’s thin cross sections greatly reduce overall weight compared to other methods while providing equal or better arc protection times. Cable heat is dissipated more rapidly than with other forms of thick arc protection. One-half lap wrap provides adequate protection for most installations. However, additional wraps can be applied if conditions warrant without requiring a reduction in conductor loads.
• Flexible unsupported elastomer—clean, easy to apply, eliminates cuts and contusions of hands.
• Conformability provides wrinkle-free wrapping and complete coverage with minimum effort.
• Provides fault arc protection to adjacent wrapped cables and accessories.
• Self-extinguishing, will not propagate flame.
• Thin thickness to save space, and allow cable heat to be dissipated more rapidly.
• Will last and maintain its arc proofing properties for the life of the cable. Resistant to water, salt water, acids, sewage and ultraviolet light.
• Can be removed and reused.
• Standard roll sizes for fast convenient installation.
| • To arc proof high-energy power cables where exposed to failures of other high-energy cables • To arc proof control cable when high energy power cables are present • Provide additional electrical insulation, thus reducing possibilities of transferred arcs |
| Item | Performance index (typical value) |
| Color | Black |
| Thickness | 0.76mm |
| Flame Resistance | UL-94 (Self Extinguishing) V-0 |
| Oxygen Index | 30.8% |
| Dielectric strength | 27.9kV/mm |
| Dielectric loss factor | 0.26% |
| Volume resistivity | 3.61×1012 Ω·cm |
| Surface resistivity | 2.14×1012 Ω |
| Tensile strength | 13.8MPa |
| Elongation | 267% |
| Water resistance | 7 days immersed in water, no blistering, no wrinkling, no lamination and no crack |
| Acid resistance | 7 days immersed in 3% sulfuric acid solution, no blistering, no wrinkling, no lamination and no crack |
| Alkali resistance | 7 days immersed in 3% sodium hydroxide solution, no blistering, no wrinkling, no lamination and no crack |
| Salt resistance | 7 days immersed in 3% sodium chloride solution, no blistering, no wrinkling, no lamination and no crack |
| Shelf life | 5 years |
(1)Width 60mm×Length 5m×Thickness 0.76mm
Note: please contact with BriteLine for any other customized dimension.
Wrap BLF-77 tape in half-lapped layers. This may be stretched to obtain a snug, wrinkle-free wrap which conforms to the cable. Overlap last 6 inches of protected cable when starting new roll of tape. Since BLF-77 tape is not adhesive coated, it must be held in place after wrapping with the glass cloth electrical tape. The most effective and economical way to hold BLF-77 tape in place is by banding (2 complete wraps) the first and last applied wrap.
BLF-77 tape has a 5-year shelf life (from date of manufacture) when stored under the following recommended storage conditions. Store behind present stock in a clean, dry place at a temperature of 20 °C and 40-50% relative humidity. Good stock rotation is recommended.
* Note: the above data is the typical data based on the test results, which shall not be regarded as product specification instructions; please contact with BriteLine for detailed information.
BLJ-10
BLJ-10 series self-adhesive insulation tape is a kind of rubber-based electrical tape with good flexibility and insulation. It has special red release liner which will not stick on the tape when unfolding. BLJ-10 tape is applicable for insulation protection with voltage level equal to and below 10kV, and could be used for all kinds of solid medium insulation layer power cables.
BLJ-20
BLJ-20 series self-adhesive insulation tape is a kind of polyisobutylene rubber based insulation tape with good flexibility and self-fusion. It has special black release liner which will not stick on the tape when unfolding. Vulcanizing is not required for BLJ-20 tape. This tape has good insulation and moisture & chemical corrosion resistant performance, which is not only applicable for low voltage insulation, but also applicable for medium voltage insulation up to 35kV. It could be used for all kinds of solid medium insulation layer power cables.
BLJ-30
BLJ-30 series self-adhesive insulation tape is a kind of ethylene propylene rubber based insulation tape with good flexibility and self-fusion. It has special release liner which will not stick on the tape when unfolding. Vulcanizing is not required for BLJ-30 tape. This tape has good and stable insulation, which is applicable for low voltage insulation and voltage insulation up to 69kV. It could be used for all kinds of solid medium insulation layer power cables.
BLJ-76
BLJ-76 series self-adhesive insulation tape is a kind of ethylene propylene rubber based insulation tape with good flexibility and self-fusion. It is linerless and is easier for operation. BLJ-76 tape is applicable for continuous working temperate at 90℃ and also emergency temperature at 130℃. This tape has excellent physical and electrical performance, which is applicable for low voltage insulation and voltage insulation up to 69kV. It could be used for all kinds of solid medium insulation layer power cables.
BLW-28
BLW-28 series waterproof insulation tape is a kind of electrical insulation and water-proof sealing tape with good flexibility and self-fusion. It is made by ethylene propylene rubber and isobutylene isoprene rubber. BLW-28 tape is not corrosive to all kinds of cable sheath materials. The tape has wide application temperature range with rated working temperature at 90℃ and emergent overload temperature at 130℃, which can be applicated in many kinds of electrical insulation and water-proof sealing cases.
BLS-13
BLS-13 series semi-conductive tape is a kind of ethylene propylene rubber insulation tape with good flexibility. Vulcanizing is not required for this tape. It has stable performance, wide application temperature scope and maintains stable conductivity, which is well compatible with the shielding material of the cable.
BLM-66
BLM-66 series water-proof and sealing mastic is a kind of mastic with excellent self-fusion and flexibility. It is strongly adhesive to surfaces of all kinds of materials. It can be used with electrical tape to ensure quick and simple insulation and water-proof sealing with reliable performance for cables, pipes, connectors of communication equipment, etc.
BLR-31
BLR-31 series sheath repairing tape has firm and anti-friction tape base with adhesive layer of strong adhesion and good high& low temperature resistance on its surface. This tape has good fire, oil and aging resistance performance, which is applicable for quick and simple sheath repairing of mineral cable and directly buried cable, etc.