Description
EPGC201 is a composite material made of glass fiber and epoxy resin, synthesized through high-temperature and high-pressure processes. It is same as G10 epoxy sheet, G represents the abbreviation for glass fiber in English, and the number 10 indicates that the content of glass fiber is 10%. EPGC201 has good mechanical properties at high temperatures, with certain strength, acid and alkali resistance, waterproofing, and good insulation performance.
In the NEMA standard, FR4 is a high-purity epoxy board that meets its requirements, with clear key parameters such as Tg value ≥ 135 ℃, dielectric constant 4.5-5.0, etc. Under the IEC standard, there are corresponding EPGC series epoxy sheets, such as EPGC201, EPGC202, etc. EPGC201 has similar performance to NEMA standard G10, while EPGC202 is flame retardant and has similar performance to FR4, but may differ from NEMA standard in specific performance indicators.
-Size specifications: Common specifications for epoxy boards under IEC standards include 1020mm × 1220mm, 1020mm × 2040mm, 1220mm × 2470mm, etc. The specifications of epoxy boards under NEMA standards may vary, but there are also various sizes in practical applications, depending on the manufacturer and market demand.
1. Our Production
Raw material preparation: building a solid production foundation
Epoxy sheet production uses epoxy resin and glass fiber cloth as the core raw materials. Epoxy resin is selected based on product performance, and high insulation resin is required for electrical applications; Fiberglass cloth should be clean and compatible in specifications. At the same time, auxiliary materials such as curing agents are proportionally mixed to make resin adhesive solution. The accuracy of the adhesive solution ratio directly affects the subsequent performance of the epoxy board. Improper ratio may lead to incomplete curing or performance degradation.
Glass fiber cloth impregnation: achieving the fusion of fibers and resins
Immerse the fiberglass cloth into the prepared adhesive solution, which can be achieved through mechanical transmission or manual operation. The key to controlling immersion time and speed is that if the time is too short, the glue solution will not penetrate sufficiently, and if the speed is too fast, it can easily cause uneven distribution of the glue solution. It is necessary to ensure that the adhesive fully penetrates the fiber gaps, tightly bonding the two and providing a good foundation for the formation of the sheet. This process has a significant impact on the strength and insulation of the sheet.
Stacking: shaping the performance of the sheet
The impregnated glass fiber cloth is stacked in the specified layers and directions. The number of layers determines the thickness and strength of the sheet, and increasing the number of layers enhances the load-bearing capacity of the sheet; The fiber direction affects the mechanical properties, and the tensile strength is higher along the fiber direction. When stacking, it is necessary to eliminate bubbles and wrinkles to ensure flatness, otherwise it will reduce the quality of the sheet, resulting in insufficient local strength or appearance defects.
Hot pressing molding: endowing the board with the final form
The stacked material is molded and solidified under high temperature and high pressure. High temperature triggers cross-linking and curing of epoxy resin, firmly bonding fibers together; High pressure eliminates internal voids and enhances density and strength. Different types of epoxy sheet have different hot pressing parameters, such as FR-4 epoxy sheet, which is usually controlled at a temperature of 170-180, a pressure of 8-12 MPa, and pressed for 2-3 hours. Parameter deviation can cause unstable performance of the sheet, such as insufficient temperature for incomplete curing and insufficient pressure for loose sheet.
Demoulding: Be careful to protect the finished product
After the epoxy resin is completely cured, cool the mold before demolding. Caution should be exercised during demolding operations to avoid damaging the sheet, otherwise edge damage, surface scratches, and other issues may occur, affecting product quality and performance. Suitable release agents can be used to assist in reducing adhesion between the sheet and the mold.
Processing: Requirements met
After demolding, the epoxy sheet is cut, polished, drilled, and processed according to actual needs. Cutting utilizes equipment such as sawing machines and laser cutting machines to accurately control size and shape; Polishing makes the surface smooth and flat, enhancing appearance and adaptability; Drilling holes facilitates the installation of connectors. The processing accuracy affects the assembly and use effect of the product, such as drilling deviation, which may cause the components to not be installed properly.
2. Production Description
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Standards |
IEC Grade: EPGC201 NEMA: G10 |
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Size |
1020x1220mm;1220x2040mm;1220x2440mm or Customized size |
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Color |
Green,Yellow,Black or Customized color |
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Production Capacity |
Max 300tons per month |
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Appearance |
Surface is smooth,flat without bubbles and cracks |
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Packing |
Wrapped with PP film outside and pallets with IPPC marks |
3. Application
EPGC201 can be used as Appliance Lines, Bearings, Computer Electronics, Carriers,Electronic Boards, Gaskets, Gears, Industrial Electronics,Machine Components,Mechanical Lines, PCB's fixture, Wave Soldering Pallet, Surfboard fin, Switches,Terminal Boards, Thick Parts,Transformers,Washers,Wear Strips etc..
4. General Applications:
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5. Technical Data Sheet
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No. |
Testing Item |
Measurement |
Requirement |
Result |
Testing Methord |
|
|
1 |
Flexural strength perpendicular |
MPa |
≥340 |
420 |
GB/T 1303.2-2009 |
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|
2 |
Tensile strength(MD) |
MPa |
≥314 |
402 |
||
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3 |
Tensile strength(TD) |
MPa |
≥216 |
300 |
GB/T 1303.2-2009 | |
|
4 |
Charpy impact strength parallel |
kJ/m² |
≥33 |
42 |
GB/T 1303.2-2009 | |
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5 |
Electric strength perpendicular to laminations (at 90℃ ±2℃ in 25# transformer oil) |
kV/mm |
≥11.8 |
13.2 |
GB/T 1303.2-2009 | |
|
6 |
Breakdown voltage parallel to laminations (at 90℃ ±2℃ in 25# transformer oil) |
kV |
≥35 |
100 |
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7 |
Relative permittivity(50Hz) |
- |
≤5.5 |
5.4 |
||
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8 |
Insulation resistance after immersion in water (Taper pin electrodes 25.0mm gap) |
MΩ |
≥5.0x10⁴ |
8.0x10⁶ | GB/T 1303.2-2009 | |
|
9 |
Water Absorption |
% |
≤0.71 |
0.04 |
GB/T 1303.2-2009 | |
|
10 |
Rockwell hardness |
- |
≥69 |
M103 |
GB/T 3398.2-2008 | |
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11 |
Glass transition temperature(DSC methord) |
℃ |
≥110 |
113 |
GB/T 22567-2008 | |
|
12 |
Adhesion strength |
N |
≥5600 |
8200 |
GB/T 1303.2-2009 | |
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13 |
Thermal stability(200℃±2℃/1h) |
No delamination No bubbles,cracking |
Meet |
1.74 |
Visual Inspection
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6. Our Certificate
We have passed ISO9001 Quality Management Mystem, ISO14001 Environmental Management System, and our EPOXY Insulation Sheet have certified by RoHS and Reach certification.
7.Our Overseas Exhibition
We actively participated in foreign related industry exhibitions, such CWIEME in Germany and Shanghai,AEC in France,Big5 in Dubai and Elecrama in India to bring our customers the best insulation products.
8. Packing and Delivery
We provide our customers with strong kraft paper and belt to ensure the safety of packing,also use PP film wrapped outside to avoid the damage and moisture in transit. We use wooden pallets with IPPC marks and fumigation certificate, which fully meet the importing countries crequirements.
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