Low Viscosity Casting Resin
Introduction
This is a low-viscosity modified epoxy resin, primarily used for bubble-free potting and insulation protection of precision electronic components.
Products Features
1. Excellent Fluidity
Viscosity as low as 330~390 mPa·s at 40℃, automatically filling tiny gaps.
2. High Thermal Conductivity
Thermal conductivity up to 0.6 W/m·K, quickly dissipating component heat to prevent local overheating.
3. Insulation Performance
Minimal impurities after high-vacuum degassing, dielectric strength ≥26 MV/m, preventing component leakage.
Basic parameters of the product before mixing
|
Components |
Main agent |
Curing agent |
Reference Standards |
|
Color |
transparent |
light yellow |
all |
|
Viscosity 40℃ (mpa.s) |
330~390 |
150~200 |
GB/T24148.4-2009 |
|
Density (g/mL)) |
1.15~1.20 |
1.10~1.20 |
GB/T6750-2007 |
Note: Customers can add fillers and adjust colors according to their product needs during use.
Process Control
1. Mold Preparation
Assemble the casting body, apply release agent, and cure in an oven at 80-100℃ for 5-8 hours.
2. Material Preheating
Mix materials at a 1:1 ratio (A:B), place in an oven preheated to 70℃, and hold for 2-3 hours.
3. Casting Tank Setup
Transfer the cured casting body to the casting tank (70-75℃). Add preheated A/B materials and fillers per formula ratio, then reduce tank temperature to 60℃.
4. Mixing & Degassing
Stir materials in the mixing tank at 60℃ for 90 minutes. Evacuate to 50-150Pa until fully degassed (confirmed via sight glass).
5. Casting & Post-Processing
Pour within 30-70 minutes (based on casting body size). Maintain vacuum for 30-40 minutes post-pour, then apply 2 kg pressure before removal.
Curing Temperature Profile
|
Stage |
Content |
Curing time (min) |
Curing temperature (°C) |
|
1 |
heating |
30 |
25~80 |
|
2 |
constant temperature |
360 |
80 |
|
3 |
heating |
15 |
80~100 |
|
4 |
constant temperature |
240 |
100 |
|
5 |
heating |
15 |
100~130 |
|
6 |
constant temperature |
360 |
130 |
Note: The curing temperature profile can be adjusted appropriately according to different product characteristics and requirements without affecting product performance.
Product Characteristics After Curing
|
Testing items |
Low viscosity casting resin |
Reference Standards |
|
Tensile strength(MPa) |
92~103 |
GB/T 15022.2-2017 |
|
Tensile modulus of elasticity (MPa) |
14.72~16.99*10³ |
|
|
Bending strength (MPa) |
136~143 |
|
|
Flexural modulus (MPa) |
12.25~13.36*10³ |
|
|
Impact strength (KJ/m²)) |
56~66 |
|
|
Elongation at break (%) |
1.6~1.8 |
|
|
Compressive strength (MPa) |
176~186 |
|
|
Hardness (Shored) |
83~88 |
|
|
Volume resistivity (Ω·m) |
1015 |
|
|
Electrical strength (MV/m) |
26 |
Packaging & Storage
Insulation Class: F
Packaging Specifications: 1000KG or 220KG
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 moisture and fire.
customization
Filler Adjustment
Fillers can be added according to requirements to meet specific performance needs.
Color Customization
Colors can be adjusted during use to match product specifications.
Company Strengths
1. Strict Quality Control
From raw material inspection to finished product release, every batch is tested for viscosity, density, and electrical properties to ensure data stability.
2. Technical Support
Provides detailed process parameter guidance, including preheating, vacuum degree, and curing temperature, to help customers get started quickly.
3. Stable Supply Chain
Sufficient raw material reserves and flexible production scheduling effectively guarantee delivery times for customers.
Applications
Electronics Protection
Used for potting PCBs, sensors, and control modules to enhance insulation and environmental resistance.
Power Modules
Suitable for encapsulating high-power electrical devices to ensure stable operation.
Small Transformers & Coils
For filling and securing miniature transformers, inductors, and coils.
Connectors & Junction Boxes
Provides sealing protection for various electrical connection components.
fAQ
Q1. How to handle bubbles in the product?
It is recommended to perform vacuum degassing at 70-75℃, with a vacuum degree of 50-150Pa, until the material is completely degassed.
Q2. How to set the curing temperature?
A step-wise heating curing process is recommended: first cure at 80℃, then at 100℃, and finally at 130℃.
Q3. What is the shelf life of the product?
Under dry, ventilated, and light-proof conditions, the shelf life is 180 days.
Q4. Can the color of the product be adjusted?
Yes. Fillers and colors can be added according to requirements during use.
Q5. How to handle skin contact?
If in contact with skin, wipe off with a soft cloth and wash with hand sanitizer; if in contact with eyes, rinse immediately with water and seek medical attention.
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