Black Iron Core Varnish
Introduction
Black Iron Core Varnish is a room-temperature curing epoxy insulation paint for iron core insulation.
Basic parameters of the product before mixing
|
Components |
Main agent |
Curing agent |
Reference Standards |
|
Color |
black |
Brown or transparent liquid |
all |
|
Viscosity 40℃ (mpa.s) |
3.8~4.6×10³ |
45~53 |
GB/T24148.4-2009 |
|
Density (g/mL)) |
1.55~1.65 |
1.10~1.20 |
GB/T6750-2007 |
Product Features
1. Strong Adhesion
Firm bonding to iron core, hard film.
2. Room Temperature Cure
Surface dry in 4h, full cure in 24h at 25℃, no heating required.
3. Excellent Film
Uniform black high-gloss, dense coating.
Applications
Transformer Cores
Insulates silicon steel laminations to prevent eddy current losses.
Motor & Generator Stators/Rotors
Forms a durable dielectric barrier on iron cores for enhanced electrical safety.
Magnetic Components in Power Electronics
Protects core surfaces from moisture, dust, and mechanical wear.
Processing Instructions
Surface Preparation
Ensure the iron core is clean, dry, and free of oil or oxidation.
Mixing
Combine main agent and curing agent at a 4:1 ratio; stir thoroughly until uniform.
Application
Apply by brushing, dipping, or spraying to achieve full coverage without runs.
Curing
Air-dry at room temperature-surface dry in 4 hours, fully cured in 24 hours at 25°C.
Customization Options
We offer tailored solutions to match your production requirements:
Viscosity adjustment for different coating methods
Cure time optimization (standard or accelerated)
Color variants beyond standard black
Enhanced mechanical or environmental resistance upon request
Product Characteristics After Curing
|
Testing items |
Black iron core paint |
Reference Standards |
|
Tensile strength(MPa) |
62~67 |
GB/T 15022.2-2017 |
|
Tensile modulus of elasticity (MPa) |
9.89~10.99*10³ |
GB/T 15022.2-2017 |
|
Bending strength (MPa) |
113~119 |
|
|
Flexural modulus (MPa) |
8.96~9.99*10³ |
|
|
Impact strength (KJ/m²)) |
17~21 |
|
|
Compressive strength (MPa) |
145~155 |
|
|
Hardness (Shored) |
78~85 |
|
|
Volume resistivity (Ω·m) |
1015 |
|
|
Surface resistivity (Ω·m) |
1015 |
|
|
Electrical strength (MV/m) |
26 |
Packaging & Storage
Main Agent: 24 KG, Hardener: 6 KG
Shelf Life and Storage Conditions
Shelf life: 180 days. After the shelf life, the product must pass inspection before use. Store in a well-ventilated, dry place away from fire.
Why Choose Us
1. Owned Factory
Modern facility with automated systems, ensuring stable capacity and on-time delivery for large orders.
2. R&D Focus
Dedicated team for formula optimization, supporting OEM/ODM to meet precise industrial needs.
3. Full QC
End-to-end testing from raw material to finished product, guaranteeing consistent quality.
4. Global Service
Deep expertise in international market, providing pre-sales consultation and after-sales support.
FAQ
Q1: Storage Requirements?
Store in a cool, dry place away from heat. Stir well before use; slight sediment is normal.
Q2: Production Lead Time?
Standard lead time is stable. Can be adjusted based on order quantity and schedule.
Q3: Supported Trade Terms?
Accept common terms such as FOB, CIF, and EXW to fit different cooperation models.
Q4: Bulk Supply Available?
Yes. Scaled production ensures stable and on-time delivery for large-volume orders.
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