Poly Wire insulations and coatings

Datasheet updated

2022-05-10 07:47
(supersedes all previous editions)

Poly a fast running, general purpose, Class 155 polyurethane wire enamel. Suitable for monolithic or dual coat applications, it meets the requirements of NEMA MW 75, MW 80 (MW 79 on finer gauges) also meets the requirements of JIS C 3003 for 'Pinhole' resistance.

Poly is available in clear and colored versions.

The primary benefit of the polyurethane is its easy solderability vs. the 180C tri-2-SOd solderable Polyester coating ( 2 seconds at 380°C vs. 5 seconds at 455°C)

Polyurethane can be readily used on Copper, Aluminium and Copper-Clad Aluminium wires as a basecoat for the commonly applied thermoplastic bond coats. It is a cost-effective insulation to be applied to wires that are used in the manufacture of precision coils, as it provides end users manufacturing benefits in handling and solderability.

Typical applications are within motors, R.F. coils, relay, encapsulated coils, ignition coils, solenoids, low voltage transformers, Multi layer and precision wound coils, speaker voice coils.

Electrical properties

Property NEMA MW-1000 ASTM D1676 IEC 851 JIS C 3003 (AWG 24)
Dissipation factor at 170°C (338°F) - 1 kHz 0.22

Mechanical properties

Property NEMA MW-1000 ASTM D1676 IEC 851 JIS C 3003 (AWG 24)
Adherence and flexibility Pass 1d Pass 1d
Cut-through temperature 223°C (433°F)
Heat shock
20% stretch - ½ h at 175°C (347°F)

Pass 3d

Soldering properties

Property NEMA MW-1000 ASTM D1676 IEC 851 JIS C 3003 (AWG 24)
at 340°C (644°F) - without/ with flux
10.0/7.0 sec
10.0/7.0 sec
10.0/7.0 sec 10.0/7.0 sec 10.0/7.0 sec
at 360°C (680°F) - without/ with flux 4.0/3.0 sec 4.0/3.0 sec 4.0/3.0 sec 4.0/3.0 sec 4.0/3.0 sec
at 380°C (716°F) - without/ with flux 2.0/1.5 sec 2.0/1.5 sec 2.0/1.5 sec 2.0/1.5 sec 2.0/1.5 sec

Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Alleima materials.