Shanghai Wenyou Industry Co., Ltd.
| Payment Terms | L/C,T/T,Western Union,MoneyGram |
| Supply Ability | Plenty of raw material in stock |
| Delivery Time | 7 -10 work days |
| Packaging Details | 20kg/pail, 220kg/barrel, 1200kg/tank |
| Breakdown Strength | ≥25 kV/mm |
| Tracking Resistance | ≥600 V |
| Dielectric Constant | 3.0-4.0 (50Hz) |
| Flammability | V1 (UL94) |
| Brand Name | WENYOU |
| Model Number | LW-8229A/LW-8229B |
| Certification | ISO/REACH/RoHS/SGS/UL |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C,T/T,Western Union,MoneyGram | Supply Ability | Plenty of raw material in stock |
| Delivery Time | 7 -10 work days | Packaging Details | 20kg/pail, 220kg/barrel, 1200kg/tank |
| Breakdown Strength | ≥25 kV/mm | Tracking Resistance | ≥600 V |
| Dielectric Constant | 3.0-4.0 (50Hz) | Flammability | V1 (UL94) |
| Brand Name | WENYOU | Model Number | LW-8229A/LW-8229B |
| Certification | ISO/REACH/RoHS/SGS/UL | Place of Origin | CHINA |
| High Light | APG Epoxy System ，HV Insulation Epoxy System | ||
The LW-8229A/LW-8229B is a pre-mixed, filler-loaded epoxy system designed for medium/high-voltage insulation (10-35kV). Combining modified BPA epoxy (LW-8229A) and anhydride hardener (LW-8229B) with integrated fillers, it delivers superior crack resistance, V1 flammability rating (UL94), and H-class thermal endurance (180°C). Optimized for vacuum casting and APG processes in transformers, CTs, and terminal posts.
| Feature | Advantage |
|---|---|
| Pre-Mixed Fillers | Simplified processing, consistent dispersion |
| V1 Flammability Rating | Enhanced fire safety for critical electrical components |
| Thermal Class H (IEC 60085) | Stable performance up to 180°C |
| APG & Vacuum Casting Ready | Flexible production integration |
| High Arc Resistance | 181-198 sec (IEC 61621) |
| Low Water Absorption | 0.10-0.20% (23°C/10d) |
| Dual-Process Compatibility | Adapts to APG or vacuum workflows |
Ideal for sealed electrical insulation:
10-35kV terminal posts & bushings
Dry-type transformers & current transformers
Switchgear insulation components
HV sensor encapsulation
Grid protection devices
*Cured system: LW-8229A/LW-8229B = 100:100 | Cure: 140°C×4h + 150°C×12h*
| Property | Value | Standard |
|---|---|---|
| Flexural Strength | 90-130 MPa | ISO 178 |
| Tensile Strength | 55-85 MPa | ISO 527 |
| Impact Strength | 8-15 kJ/m² | ISO 179 |
| Glass Transition (Tg) | 105-120°C | ISO 11357-2 |
| Thermal Conductivity | 0.8-0.9 W/m·K | ISO 8894-1 |
| Decomposition Temp | >320°C | ASTM E2402 |
| Breakdown Strength | ≥25 kV/mm | IEC 60243-1 |
| Volume Resistivity | 10¹⁵ Ω·cm | IEC 62631-3-1 |
| Tracking Resistance | ≥600 V | IEC 60112 |
| Dielectric Constant | 3.0-4.0 (50Hz) | IEC 60250 |
| Flammability | V1 (UL94) | UL94/GB/T2408 |
| Hydrophobicity | HC1 Class | IEC 62073 |
Q1: Are fillers pre-mixed in this system?
A: Yes! Both LW-8229A (resin) and LW-8229B (hardener) contain pre-dispersed fillers, ensuring uniform properties and reduced mixing complexity.
Q2: What curing cycle is recommended?
A: For vacuum casting:
Cure: 75°C/4-5h → 95°C/2h → 115°C/4-6h → Post-cure 150°C/12h
For APG: Post-cure 130-150°C/10-12h after molding.
Q3: Why choose V1 flammability over HB?
A: V1 rating offers superior fire resistance for high-risk applications like transformers and terminal posts, meeting stricter safety standards.
Q4: Is silica filler adjustable?
A: Fillers are pre-loaded. For custom ratios, contact Shanghai Wenyou for tailored solutions.
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
2008
Total Annual:
15000000-25000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Shanghai Wenyou Industry Co., Ltd.mainly engaged in the advanced materialsof MV and HV insulation products for indoorand outdoor use, both suitable for APG andvacuum casting. Our wide range of products includes epoxy resin, flame retardant resin, curing agents, outdoor modifiers, toughe... Shanghai Wenyou Industry Co., Ltd.mainly engaged in the advanced materialsof MV and HV insulation products for indoorand outdoor use, both suitable for APG andvacuum casting. Our wide range of products includes epoxy resin, flame retardant resin, curing agents, outdoor modifiers, toughe...
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