Habia Twisted Wires - Reducing cross-talk in a sensitive application

ETFE

Key Properties

-65ºC to +150ºC
Thin wall material
Highly flame retardant
Low smoke generation
Excellent for use in water, fuels, oils, acids and bases

General Information
ETFE is a tough material with a good balance of mechanical properties - excellent tear strength, good tensile strength with moderate stiffness, outstanding impact strength and a good flex life.

The material is good for use as a dielectric - it has a dielectric constant of 2.6, a high dielectric strength, excellent resistvity and a low dissipation factor of magnitude 0.003. Its low dielectric constant is essentially constant with changing frequency or temperature.

ETFE has a broad and useful temperature range, usually set to -65ºC to +150ºC continuously, it retains remarkable toughness at very low temperatures and the embrittlement temperature of ETFE is below -100ºC. In addition to this, ETFE passes several severe flame tests, for example IEEE 383 and has also the UL 94 V-0 rating.

The effect on physical properties can be expected to be small for most chemicals and the permeability is very low for common gases and vapors.

HFI

Key Properties

-50ºC to +120ºC
Thin dual wall insulation
Highly flame retardant
Low smoke generation
Zero halogen
Excellent for use in water, fuels, oils, acids and bases
Radiation tolerance: >10E6 Gy
Fully approved to: UK Defence Standard 61-12 Part 18 Issue 5

General Information

Designed to meet the stringent requirements of Def Stan 61 12 Part 18 Issue 5, HFI 140 has the many benefits of a dual wall insulation, coupled with those of a thin wall equipment wire.

Though originally designed for the defence industry, the product is rapidly finding uses in high spec. civilian use, not least of which is that of UK London Underground: Section 12 applications (stations, platforms, escalators etc. where people are present) thanks to its excellent fire smoke and toxicity performance.

The material is tough and highly abrasion resistant. It is very good in both water and fire whilst it’s component layers also make it excellent for use in radiation.

LSI 155

Key Properties

-65ºC to +150ºC
Thin wall / dual wall material
Highly flame retardant
Low smoke generation
Excellent for use in water, fuels, oils, acids and bases
Fully approved to: UK Defence Standard 61-12 Part 33/001

General Information
In terms of electrical performance, LSI 155 is very much like its non-crosslinked sister version: ETFE, however it does feature improved temperature stability and also some of the mechanical factors such as scrape abrasion are enhanced.

Designed to meet the requirements of Def Stan 61 12 Part 33/001, The temperature rating of LSI 155 varies in accordance with that specification. Therefore the material is rated at +135ºC for use with a TPC conductor and +150ºC for use with an SPC or NPC conductor. High strength copper alloys are commonly used on the smallest sizes (24 AWG and below) in line with the specification.