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Electrical insulating heat-resistant self-fusing tape

Electrical insulating heat-resistant self-fusing tape

LETSAR tape is 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. It features moisture resistance, resistance to ozone, ultraviolet rays, complete absence of toxicity, resistance to a number of oils and many chemicals. LETSAR 5A tape has fire-resistant properties. Tapes of “Zh”, “R”, “F” grades change to a lighter color at elevated temperatures (+250 °C) (can serve as an indicator). Working temperature range for “ChP” and 5A grades is from -50°С to +250°С (short-term up to +300°С), for “Zh”, “R”, “F” grades working temperature range is from -50°С to + 200°С (short-term up to +250°С). Between themselves, LETSAR tapes differ in working temperature range and electrical insulating properties, color. According to cross-section profile “F” grade shaped tapes are available.

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Application Characteristics

Application

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.

LETSAR “ChP” is used to ensure sealing of electrical insulation and moisture protection of electrical harnesses of aircraft engines. It can also be used for insulation of flexible shunts and leads of AC and DC electrical machines, induction electric furnaces, high-voltage transformers.

LETSAR 5A can be used as a protective layer for electric harnesses and tubular parts preventing from heating damage.

LETSAR “Zh”, LETSAR “R”, LETSAR “F” can be used in home repairs for:

— electrical insulation of cables, wires and connections, including those operating in an environment of high temperatures and humidity,

— electrical insulation of tool handles,

— temporary elimination of leaks in heating and water supply pipes,

— sealing of hoses and tubes,

— car repairs on the road.

Characteristics

LETSAR “ChP” (Specification 22.19.20-003-19346675-2021)

LETSAR 5A (Specification 22.19.20-007-19346675-2021)

LETSAR “Zh”, LETSAR “R”, LETSAR “F” (Specification 22.19.20-006-19346675-2021)

Properties

features moisture resistance, resistance to ozone, ultraviolet rays;
complete absence of toxicity;
resistant to a number of oils and many chemicals;
tape LETSAR 5A has fire-resistant properties;
tapes of “Zh”, “R”, “F” grades change to a lighter color at elevated temperatures (+250 °C);
working temperature range for “ChP” and 5A grades is from -50°С to +250°С (short-term up to +300°С), for “Zh”, “R”, “F” grades working temperature range is from -50°С to + 200°С (short-term up to +250°С).

Technical characteristics

Parameter		LETSAR
Marking		5A	“ChP“	“Zh“	“R“	“F“
Color		Gray	Black	Yellow	Pink	Violet
Tape autohesion after half-lap tape application and exposure:	at 25 ± 5°C for 48 h.	No delamination	No delamination	No delamination
	at 150 ± 3°C for 3 h.	No delamination	—	No delamination
Nominal tensile strength, MPa, minimum		4.0	4.0	4.0	4.0	4.0
Elongation at break, %, minimum		450	350	450	450	450
Nominal tensile strength after 48 h. at +250°C, MPa, minimum		2.45	2.45	2.45	2.45	2.45
Elongation at break after 48 h. at +250°C, %, minimum		100	150	100	100	100
Volume resistivity, Ohm·cm		1∙10¹³	1∙10¹²	1∙10¹³	1∙10¹³	1∙10¹³
Dielectric strength, kV/mm, minimum		20	17	20

Packing:

LETSAR tape is shipped in 130-150 mm dia. rolls (spools). Net weight of the tape in the roll is 700 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.

Guaranteed shelf life:

10 months

Guarantee:

The product is manufactured according to the Specification. The product meets the stated information within the shelf life and subject to storage conditions.