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3025 Phenolic cotton cloth laminated sheet
Name：Phenolic cotton cloth laminatedsheet
Colors include :brown
Shapes Include: Sheets
I. Description
Thisproduct is formed into laminated board through drying and heat pressing aftercotton cloth dips into PF resins. It is suitable as the structural componentswith a certain mechanical performance and electric performance for machinery,electric engine and electric equipment.
I. Technical requirement forsurface
The surface of
laminated board should be flat and smooth, no bubble, no wrinkle or crackle,
and properly free from other defects such as scrape, impress, dirt spot and
uneven color, but a little color patches is allowed.
I. Main Performance index
Table 1 :Performance index
| Sr. | Performance | Unit | Test method | Index value |
| 1 | Vertical layer direction bending strength | MPa | GB/T5130 section 5.1 | ≥ 50 |
| 2 | Parallel layer direction compact strength（Simple strut-beam，notch specimen） | KJ/m2 | GB/T5130 section 5.5 | ≥ 8 |
| 3 | Parallel layer direction compact strength（Suspended arm beam，notch specimen） | KJ/m2 | GB/T5130 section 5.5 | ≥ 4 |
| 4 | Parallel layer shearing strength | MPa | GB/T5130 section 5.6 | ≥ 25 |
| 5 | Vertical layer direction electric strength at （90±2）°c oil. | MV/m | GB/T5130 section 6.1 | Refer to table 2 |
| 6 | Parallel layer direction breakdown voltage at （90±2）°c oil. | kV | GB/T5130 section 6.1 | ≥ 2 |
| 7 | Insulation resistance after water dipping | Ω | GB/T5130 section 6.3 | ≥ 1 × 107 |
| 8 | Density | g/cm3 | GB/T5130 section 8.1 | 1.3-1.6 |
| 9 | water absorption | mg | GB/T5130 section 8.2 | Refer to table 3 |
Table2 : Vertical layer direction electric strength
| Average thickness mm | Electric strength MV/m | Average thickness mm | Electric strength MV/m |
| 0.8 | ≥ 0.89 | 2.0 | ≥ 0.65 |
| 0.9 | ≥ 0.84 | 2.2 | ≥ 0.61 |
| 1.0 | ≥ 0.82 | 2.4 | ≥ 0.58 |
| 1.2 | ≥ 0.80 | 2.6 | ≥ 0.56 |
| 1.4 | ≥ 0.76 | 2.8 | ≥ 0.53 |
| 1.6 | ≥ 0.7 | 3.0 | ≥ 0.50 |
| 1.8 | ≥ 0.69 |
Note:
1. For the vertical layer direction electric strength at 90°c ±2°c oil, you can select either in 20spressure rising-up gradually test requirementor in 1mm withstandpressure test requirement. For the material meeting with requirement of eitherone, its vertical layer direction electric strength at 90°c ±2°c oil is deemed to meet with this standard requirement.
2. If the arithmetical mean of measured thickness of specimen (specimen) isbetween two thickness values in table, its indicated value should be calculatedout by interpolation. If the arithmetical mean of measured thickness is lessthe min. thickness indicated in table, its limit value of electric strength isequal to the value of min. thickness. If the nominal thickness is 3mm and the arithmetical mean value ofmeasured thick is more than 3mm,its electric strength is taken out according to 3 mm thickness limit value.
Table3 : water absorption
| Sample thickness mean value（d） mm | Water absorption mg | Sample thickness mean value（d） mm | Water absorption mg |
| 0.8 <= d <= 1.0 | ≤ 380 | 3.0 < d≤ 6.0 | ≤ 500 |
| 1.0 < d <= 2.0 | ≤ 420 | 6.0 < d ≤ 10 | ≤ 550 |
| 2.0 < d <= 3.0 | ≤ 450 | 10 < d ≤ 20 | ≤ 600 |
Application
Chemicalmachine parts , general machine parts and gear motors and generators etc.
Size:
| Phenolic cotton cloth Sheet | |
| Thickness (mm) | Width/Length(mm) |
| 0.5-2mm | 1020mm x 2020mm |
| 3--60mm | 1020mm x 2020mm |
| 65--180mm | 1020mm x 2020mm |