Epoxy Glass Cloth Rigid Laminated Sheets (EPGC sheets)
EPGC series Epoxy Glass Cloth Rigid Laminated Sheet consists of woven glass cloth impregnated with epoxy thermoseting resin, laminated under high temperature and high pressure. The woven glass cloth shall be alkali-free and treated by silane coupler. EPGC serial sheets include the EPGC201 (NMEMA G10), EPGC202( NEMA FR4), EPGC203(NEMA G11), EPGC204 (NEMA FR5), EPGC306 and EPGC308.
EPGC sheets (thermal class: B～H), produced as per IEC60893-3-2. These sheets have excellent mechanical strength (the thermal state strength retention rate can reach over 50%) under medium temperature or thermal state, as well as the stable electric property (the insulation resistance after immersion reaches 1012Ω ) in high humidity condition. And also with higher voltage endurance / withstand voltage (over 35kV), parallel to lamination. EPGC202, EPGC204 and EPGC306 also have excellent flame retardant property. The sheets also passed toxic and hazardous substance detection (with RoHS Report).
Used as the insulation structural parts in Class B-H electric motors，electrical equipment, which have flame resistance requirements or not, or other applications.
Available thickness: 0.30mm~200mm
Available sheet size:
1500mm*3000mm、1220mm*3000mm、1020mm*3000mm、1020mm*2440mm、1220mm*2440mm、 1500mm*2440mm、1000mm*2000mm、1200mm*2000mm and other negotiated sizes.
The Classification And Type Of Epgc Sheets
| Type name | Application & feature | Thermal class | |||
| D&F | GB/IEC | NEMA | others | ||
| DF201 | EPGC201 | G10 | Hgw 2372 | For mechinery, electric equipment and electrons. With high strength under medium temperature, excellent arc resistance and a higher PTI and CTI | B 130℃ |
| DF202 | EPGC202 | FR-4 | Hgw 2372.1,F881 | Similar to EPGC201, owning stated flame retardant. | B 130℃ |
| DF202A | --- | --- | --- | Similar to DF202, but with higher mechanical strength. | B 130℃ |
| DF203 | EPGC203 | G11 | Hgw2372.4 | For mechanical, electric equipment and electrons. With the highest strength under middling temperature | F 155℃ |
| DF204 | EPGC204 | FR-5 | Hgw 2372.2 | Similar to DF203, owning stated flame retardant. | F 155℃ |
| DF306 | EPGC306 | --- | DF336 | Similar to DF203, owning excellent flame resistance,arc resistance and higher PTI. | F 155℃ |
| DF306A | --- | --- | --- | Similar to DF306, but owning higher mechanical strength. | F 155℃ |
| DF308 | EPGC308 | --- | --- | Similar to DF203, but with better thermal stability. | H 180℃ |
Technical Requirements
Appearance
The surface of sheet shall be flat and smooth, free of air bubbles, wrinkles or cracks and reasonably free of other small imperfections such as scratches, dents, etc. The edge of sheet shall be tidy and be free of delamination and cracks. The color shall be substantially uniform, but a few stains are permissible.
Nominal thickness and tolerance Unit: mm
|
Nominal thickness |
Deviation |
Niminal thickness |
Deviation |
|
0.5，0.6 0.8，1.0 1.2 1.5 2.0 2.5 3.0 4.0 5.0 6.0 8.0 |
+/-0.15 +/-0.18 +/-0.21 +/-0.25 +/-0.30 +/-0.33 +/-0.37 +/-0.45 +/-0.52 +/-0.60 +/-0.72 |
10 12 14 16 20 25 30 35 40 45 50 60 |
+/-0.82 +/-0.94 +/-1.02 +/-1.12 +/-1.30 +/-1.50 +/-1.70 +/-1.85 +/-2.10 +/-2.45 +/-2.60 +/-2.80 |
| Remarks: For sheets of non-nominal thickness not listed in this Table, the allowed deviation shall be the same asthat of the next greater thickness | |||
Bending Deflection for Sheets Unit: mm
|
Thickness |
Bending Deflection |
|
3.0～6.0 ＞6.0～8.0 ＞8.0 |
≤10 ≤8 ≤6 |
Mechanical processing:
The sheets shall be free of cracks and scraps when such machining as sawing, drilling, lathing and milling is applied.
Physical, Mechanical And Dielectric Properties
| No. | Properties | Unit | EPGC201 | EPGC202 | EPGC203 | ||||
| Standard value | Typical value | Standard value | Typical value | Standard value | Typical value | ||||
| 1 | Water absorption（2mm sheet） | mg | ≤20 | 8 | ≤20 | 9 | ≤20 | 9 | |
| 2 | Flexual strength | At normal condition | MPa | ≥340 | 460 | ≥340 | 500 | ≥340 | 450 |
| (Lengthwise) | 155℃+/-2℃ | --- | --- | --- | --- | ≥170 | 240 | ||
| 3 | Impact strength,parallel to laminations (Charpy, notch) | kJ/m2 | ≥33 | 53 | ≥33 | 51 | ≥33 | 50 | |
| 4 | Electric strength,perpendicular to laminations ( in transformer oil at 90℃+/-2℃) | kV/mm | ≥11.8 | 17 | ≥11.8 | 17 | ≥11.8 | 18 | |
| 5 | Electric strength, parallel to laminations ( in transformer oil at 90℃+/-2℃) | kV | ≥35 | 48 | ≥35 | 45 | ≥35 | 45 | |
| 6 | Dielectric dissipation factor（1MHz） | --- | ≤0.04 | 0.02 | ≤0.04 | 0.02 | ≤0.04 | 0.021 | |
| 7 | Dielectric constant（1MHz） | --- | ≤5.5 | 4.8 | ≤5.5 | 4.7 | ≤5.5 | 4.7 | |
| 8 | Arc resistance | s | --- | --- | --- | 182 | --- | 182 | |
| 9 | Proof tracking resistance (PTI） | V | --- | --- | --- | 600 | --- | 600 | |
| 10 | Insulation resistance after immersion in water | MΩ | ≥5.0x104 | 2.1 x107 | ≥5.0x104 | 1.5 x106 | ≥5.0x104 | 1.1 x107 | |
| 11 | Flammability | Grade | --- | --- | V-0 | V-0 | --- | --- | |
| 12 | Temperature Index(TI) | --- | ≥130 | ≥130 | ≥155 | ||||
| No. | Properties | Unit | EPGC204 | EPGC306 | EPGC308 | ||||
| Standard value | Typical value | Standard value | Typical value | Standard value | Typical value | ||||
| 1 | Water absorption（2mm） | mg | ≤20 | 11 | ≤20 | 8 | ≤20 | 9 | |
| 2 | Flexual strength | At normal condition | MPa | ≥340 | 480 | ≥340 | 460 | ≥340 | 500 |
| (Lengwise) | 155℃+/-2℃ | ≥170 | 260 | ≥170 | 280 | --- | 270 | ||
| 3 | Impact strength,parallel to laminations (Charpy, notch) | kJ/m2 | ≥33 | 51 | ≥33 | 53 | ≥33 | 52 | |
| 4 | Electric strength,perpendicular to laminations ( in transformer oil at 90℃+/-2℃) | kV/mm | ≥11.8 | 16 | ≥11.8 | 17 | ≥11.8 | 18 | |
| 5 | Electric strength, parallel to laminations ( in transformer oil at 90℃+/-2℃) | kV | ≥35 | 45 | ≥35 | 48 | ≥35 | 45 | |
| 6 | Dielectric dissipation factor（1MHz） | --- | ≤0.04 | 0.018 | ≤0.04 | 0.02 | ≤0.04 | 0.02 | |
| 7 | Dielectric constant（1MHz） | --- | ≤5.5 | 4.7 | ≤5.5 | 4.8 | ≤5.5 | 4.7 | |
| 8 | Arc resistance | s | --- | --- | --- | 182 | --- | --- | |
| 9 | Proof tracking resistance (PTI） | V | --- | --- | --- | 600 | --- | --- | |
| 10 | Insulation resistance after immersion in water | MΩ | ≥5.0x104 | 3.8 x106 | ≥5.0x104 | 1.8 x107 | ≥5.0x104 | 7.1 x106 | |
| 11 | Flammability | Grade | V-0 | V-0 | V-0 | V-0 | --- | --- | |
| 12 | Temperature Index(TI) | --- | ≥155 | ≥155 | ≥180 | ||||
Packing And Storage
The sheets shall be stored in a place where temperature is no higher than 40℃, and be placed horizontally on a bedplate with a height of 50mm or above. Keep away from fire, heat (heating apparatus) and direct sunshine. The storage life of sheets is 18 months from the date of leaving factory. If the storage duration is over 18 months, the product also could be used after being tested to be qualified.
Remarks And Precautions For Application
1 Machining shall comply with JB/Z141-1979, Machining methods of insulation laminated products, because the sheets have inherent difference in attribute from metal.
2 A high speed and small cutting depth shall be applied when machining because of sheets’ weak thermal conductivity.
3 Machining and cutting this product will release much dust and smoke. Suitable measures should be taken to ensure dust levels are within acceptable limits during operations. Local exhaust ventilation and using the suitable dust/particle masks are advised.
4 The sheets are subject to moisture after being machined, a coating of insulating vanish is recommended.
Production Equipment
The Package For EPGC Sheets
