3240 epoxy board, epoxy resin is a polymer compound, a molecule containing two or more than two epoxy groups, in addition to individual, their relative molecular mass is not high. 3240 epoxy board, the molecular structure of epoxy resin in the molecular chain with lively epoxy group as its characteristic, the epoxy groups can be located in the end of the chain, or intermediate molecules into ring like structures.
3240 epoxy board Yangzhou PENGYUAN Electric Co. Ltd.
Brief introduction of 3240 epoxy board:
3240 epoxy board is impregnated with epoxy glass cloth by epoxy resin, and then dried and pressed.
Epoxy resin is a polymer compound, a molecule containing two or more than two epoxy groups, in addition to individual, their relative molecular mass is not high.
The molecular structure of 3240 epoxy board is in the molecular chain with lively epoxy group as its characteristic, the epoxy groups can be located in the end of the chain, or intermediate molecules into ring like structures.
Characteristics of 3240 epoxy plate:
1, 3240 epoxy plate surface should be smooth, no bubbles, pits and wrinkles, but allow does not affect other defects, such as: using scratch, indentation, stain, and a small number of spots. The edge should be cut neatly, and the end face shall not be divided into layers and cracks.
2, 3240 epoxy board implementation standards: GB/T1303.1-1998 (NATURAL), red, green, black as the agreement standard.
3, 3240 epoxy board temperature resistance grade: B class color: natural color (yellow), red, green, black and so on (can add color, mix into a variety of colors)
4 and 3240 epoxy board characteristics: after curing epoxy resin system has excellent mechanical properties, high temperature strength Jie machine, good electrical properties under high humidity.
5, 3240 epoxy board electric: after curing epoxy resin system is a good use of insulating materials with high dielectric properties, resistance to surface leakage current, arc resistance: mechanical, electronic, electrical. It is suitable for mechanical, electrical, electronic, electrical and other fields. Also used for insulation parts processing, processing into all kinds of insulation parts. Components of equipment insulation structure.
6, 3240 epoxy plate thickness: under normal circumstances is 0.5 ~ 50mm, can also be required to produce 50~150mm thick plate.
3240 parameters of epoxy plate:
1, 3240 epoxy board surface should be smooth, no bubbles, wrinkles and cracks.
The nominal thickness and allowable deviation of 2 and 3240 epoxy sheets are shown in table 1.
Nominal thickness deviation Standard thickness deviation
0.4 ±0.10 8.0 ±0.72
0.5 ±0.12 10.0 ±0.82
0.6 ±0.13 12.0 ±0.94
0.8 ±0.16 14.0 ±1.02
1.0 ±0.18 16.0 ±1.12
1.2 ±0.20 20.0 ±1.30
1.6 ±0.24 25.0 ±1.50
2.0 ±0.28 30.0 ±1.70
2.5 ±0.33 35.0 ±1.95
3.0 ±0.37 40.0 ±2.10
4.0 ±0.45 45.0 ±2.30
5.0 ±0.52 50.0 ±2.45
6.0 ±0.60 60.0 ±2.50
Note: 1 other allowable deviations can be negotiated by both suppliers and buyers. 2 the deviation of the preferred thickness should be taken as the next larger preferred thickness for one of the preferred thicknesses not listed in the nominal thickness.
3. Flatness is shown in table 2. Table 2 the maximum allowable deviation of the distance between the surface of the laminate and the ruler mm
3240 epoxy plate thickness (d) 3240 epoxy board ruler length
1.6≤d≤3 3<> 6<> 8< d See note 1086 See note 2.52.01.5
Note: the nominal thickness > 1.6mm < d < 3mm allowable deviation is under consideration
4. Performance requirements are shown in table 4. Table 4 performance requirements
Serial number Index name Company Index value Explain
1 Vertical flexural strength MPa ≥340 -
2 Parallel layer impact strength (simple supported beam method) KJ/ ≥33 One of the two meet the requirements of the standard
3 Parallel layer impact strength (cantilever beam method) kJ/ ≥34
4 Vertical layer electrical strength (90 + 2 c) MV/m See Table 5 -
5 Parallel layer breakdown voltage (90 + 2 c) kV ≥35 -
6a Dielectric constant (less than 48Hz-62Hz) - ≤5.5 One of the two meet the requirements of the standard
6b Dielectric constant (less than 1MHz) - ≤5.5
7 Martin temperature longitudinal ℃ ≥200
8 thermal stability ℃ 200
9 4h in oil resistant transformer oil ℃ 130
10 Tensile strength longitudinal transverse MPa ≥314 ≥216
11 Adhesion strength N ≥5600
12 The surface resistivity is normal after immersion MΩ ≥1× ≥1×
13 The volume resistivity is normal after immersion MΩ·m ≥1× ≥1×
14 When the insulation resistance of parallel layer is normal, it will be soaked after water immersion MΩ ≥1× ≥1×
15a Dielectric loss factor (less than 48Hz-62Hz) - ≤0.04 One of the two meet the requirements of the standard
15b Dielectric loss factor (less than 1MHz) - ≤0.04
16 Insulation resistance after soaking Ω ≥5.0× -
17 density g/ （1.7-1.9） -
18 Water absorbency mg See Table 6 -
Table 5 vertical layer to electrical strength
3240 the average thickness of epoxy plate is mm 3240 epoxy plate electrical strength MV/m 3240 epoxy plate thickness mm 3240 epoxy plate electrical strength MV/m
0.4 ≥16.9 1.6 ≥12.7
0.5 ≥16.1 1.8 ≥12.2
0.6 ≥15.6 2.0 ≥11.8
0.7 ≥15.2 2.2 ≥11.4
0.8 ≥14.8 2.4 ≥11.1
0.9 ≥14.5 2.5 ≥10.9
1.0 ≥14.2 2.6 ≥10.8
1.2 ≥13.7 2.8 ≥10.5
1.4 ≥13.2 3.0 ≥10.2
Note: 1 one of the requirements for the electrical strength of the vertical layer in the oil at 90 DEG C + 2 C, optional 20s step by step and 1min withstand voltage test. For the material conforming to the requirements of the two, the electrical strength of the vertical layer in the oil at the temperature of 90 DEG C + 2 C is in accordance with the requirements of this standard. 2 if the measured mean value of the thickness of the sample is between the two thickness of the table, its index value should be calculated by interpolation method. If the 0.4mm value is less than the measured thickness of the arithmetic average of the electrical strength index values greater than or equal to 16.9MV/m. If the nominal thickness of 3mm, and measured the thickness of the arithmetic mean value is greater than 3mm, more than 10.2MV/m from the water table 6 electrical strength index
The average thickness of sample is mm Water absorbent mg The average thickness of sample is mm Water absorbent mg
0.4 ≤17 5 ≤25
0.5 ≤17 6 ≤27
0.6 ≤17 8 ≤31
0.8 ≤18 10 ≤34
1.0 ≤18 12 ≤38
1.2 ≤18 14 ≤41
1.6 ≤19 16 ≤46
2.0 ≤20 20 ≤52
2.5 ≤21 25 ≤61
3 ≤22 Single-sided processing to 22.5 ≤73
Note: 1 if the measured mean value of the thickness of the sample is between the two thickness of the table, its index value should be calculated by interpolation method. 2 if the 0.4mm value is less than the measured thickness of arithmetic average, the index value is less than or equal to 17mg. If the nominal thickness is greater than the 25mm value for 25mm and measured the thickness of the arithmetic average, the index value is less than or equal to 61mg. The sheet with nominal thickness greater than 25mm should be machined from one side to 22.5MM and the machined surface should be relatively smooth.
3240 epoxy board is made of alkali free glass fiber cloth impregnated with epoxy phenolic resin. It is baked and pressed.
3240 epoxy board has high mechanical and dielectric properties, good heat resistance and moisture resistance, and has good machinability, heat resistance grade is B class.
3240 epoxy plate is suitable for motor, electrical equipment, as insulation components, and can be used in the tidal temperature environment and transformer oil.
3240 epoxy board is widely used in generators, motors and electronic devices as insulating materials and components because of its high mechanical and electrical properties. It is also suitable for transformer oil pressure environment and humidity environment.
7, epoxy resin and the curing agent reacts by direct addition reaction or resin molecules of the epoxy group ring opening polymerization, no water or other volatile by-products release. Compared with unsaturated polyester resin and phenolic resin, they show very low shrinkage (less than 2%) during curing.