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HindiElectrical insulating heat-resistant self-fusing radiation cure rubber tape
LETSAR tapes are made from siloxane polymers and are radiation cured with excellent self-fusing properties and performance. Universal and unique tapes of their kind for electrical insulation, thermal insulation and sealing in various application. LETSAR has a self-fusing (autohesion) ability at (25±5) °C within 48 hours (type H) or with additional heating within three hours at (150±3) °C (type G). In this process, a monolithic, very durable silicone rubber shell is formed, which provides hermetic protection of a joint from atmosphere and sun exposure. LETSAR tape features moisture resistance, resistance to ozone, ultraviolet rays, complete absence of toxicity, resistance to a number of oils and many chemicals, electric current. LETSAR is produced in two grades: K – red color tape designed for use in the temperature range from -50°С to + 250°С (short-term + 300°С); B – white color tape, designed for use in the temperature range from -50°C to + 200°C (short-term + 250°C). LETSAR tape is produced in two groups (I or II) differing in physical and mechanical parameters. Between themselves, LETSAR tapes differ in the working temperature ranges and electrical insulating properties, color and thickness. According to the cross-section profile they are available as rectangular “P” and shaped “F”.
Radiation cure LETSAR tape is intended for use in electrical and other industries as an electrically insulating elastic material for various parts and assemblies of electrical machines and devices.
It is used for insulation of flexible shunts and leads of AC and DC electrical machines, induction electric furnaces, high-voltage transformers, for bonding, orientation, transportation and development of semiconductor elements, insulation of electrical cables, harnesses, busbars and conductors.
Due to the self-shrinking effect, LETSAR in addition to the insulation of electrical products can also be used for mechanical waterproofing of plastic and anti-corrosion protection of metal pipeline joints that are not subjected to active movement and in other areas where PVC tapes cannot be used.
In home applications LETSAR tape can be used:
- temporary elimination of leaks in heating and water supply pipes,
- electrical insulation of cables, wires and connections, including those operating in an environment of high temperatures and humidity,
- electrical insulation of tool handles,
- sealing of hoses and tubes,
- car repairs on the road.
Specification 38.103171-80
Properties
- has a self-fusing (autohesion) ability at (25±5) °C within 48 hours (type H) or with additional heating within three hours at (150±3) °C (type G)
- forms a very durable monolithic silicone rubber shell;
- provides hermetic protection of the connection from atmosphere and sun exposure;
- features moisture resistance, resistance to ozone, ultraviolet rays;
- complete absence of toxicity;
- resistant to a number of oils and many chemicals, electric current.
Technical characteristics
|
Parameters |
Value |
|
|
Group I |
Group II |
|
|
Tape autohesion after half-lap tape application and exposure:
— at (25±5) °C for 48 h for H type, — at (150±3) °C for 3 h for G type |
No delamination |
|
|
Physical and mechanical properties: |
||
|
Nominal tensile strength, MPa, minimum |
4.9 |
4.4 |
|
Elongation at break, %, minimum |
350 |
|
|
Physical and mechanical properties after thermal ageing: |
||
|
For red tape after exposure at 300 °C for 48 h: |
|
|
|
— Nominal tensile strength, MPa, minimum |
2.45 |
|
|
— Elongation at break, %, minimum |
100 |
|
|
For white tape after exposure at 250 °C for 72 h: |
|
|
|
— Nominal tensile strength, MPa, minimum |
2.95 |
|
|
— Elongation at break, %, minimum |
150 |
|
|
Dielectric properties: |
||
|
volume resistivity, Ohm·cm, minimum |
1∙1014 |
1∙1013 |
|
dielectric strength, kV/mm, minimum |
20 |
|
|
Tan δ at 50 Hz and 1 kv/mm electric stress, maximum |
0.02 |
|
Packing:
tape is shipped in 130-150 mm dia. rolls (spools). Net weight of the tape in the roll is 500 g. max. A polyethylene tape is laid between the rubber layers, which prevents the layers from fusing.
Tape rolls are packed in polyethylene film bags. Bags are placed in max 40 kg plywood boxes.
Packing:
tape is shipped in 130-150 mm dia. rolls (spools). Net weight of the tape in the roll is 500 g. max. A polyethylene tape is laid between the rubber layers, which prevents the layers from fusing.
Tape rolls are packed in polyethylene film bags. Bags are placed in max 40 kg plywood boxes.
Guarantee:
The product is manufactured according to the Specification. The product meets the stated information within the shelf life and subject to storage conditions.