Tianjin Ruiyuan Electric Material Co,.Ltd
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Polyurethane insulated 0.25mm enameled copper wire
UEW+NY is a dual film solderable insulation composed of Modified Polyurethane resins with a Polyamide (nylon) overcoat. The nylon overcoat provides a significant reduction in the wire's coefficient of friction aiding both windability and the production of compact coils.
Enameled wire is a main variety of winding wire. It consists of conductor and insulating layer. After the bare wire is softened by annealing, it is painted and baked many times.
| Characteristics | Technical requests | Test Results | Conclusion | |||||||||
| Sample 1 | Sample 2 | Sample 3 | ||||||||||
| 1 | Surface | Good | OK | OK | OK | OK | ||||||
| 2 | Bare Wire Diameter | 0.025± | 0.003 | 0.250 | 0.250 | 0.250 | OK | |||||
| 0.003 | ||||||||||||
| 3 | Coating Thickness | ≥ 0.016 mm | 0.025 | 0.024 | 0.024 | OK | ||||||
| 4 | Overall Diameter | ≤ 0.277 mm | 0.275 | 0.274 | 0.274 | OK | ||||||
| 5 | Conductor Resistance | ≤ 0.360 Ω/m | 0.352 | 0.353 | 0.356 | OK | ||||||
| 6 | Elongation | ≥ 24 % | 29% | 30% | 29% | OK | ||||||
| 7 | Breakdown Voltage | ≥ 2300 V | 3553 | 3667 | 3614 | OK | ||||||
| 8 | Pinhole Test | ≤ 5 hole/5m | 0 | 0 | 0 | OK | ||||||
| 9 | Enamel continuity | ≤5hole/30m | 0 | 0 | 0 | OK | ||||||
| Remark: | ||||||||||||
| Test Items | Technical Requests | Results | Conclusion: Approved | |||||||||
| 1 | Adhesive | Coating layer is good | OK | |||||||||
| 2 | Cut-through | 200℃ 2mins no breakdown | OK | |||||||||
| 3 | Heat Shock | 180±5℃/30min no crack | OK | Audit by | Tested by | |||||||
| 4 | Solder Ability | 390± 5℃ 2 Sec Smooth | OK | Pan Lihong | ||||||||
| 5 | Solvent Resistance | No blister, no expansion, no shed | OK | |||||||||
