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Phenolic Paper Laminated Sheet
Bakelite sheet is a hard, dense material made by applying heat and pressure to layers of paper impregnated with phenolic resin. These layers of laminations are usually of cellulose paper, cotton fabrics, synthetic yarn fabrics, glass fabrics or unwoven fabrics. When heat and pressure are applied to the layers, a chemical reaction (polymerization) transforms the layers into a high-pressure thermosetting industrial laminated plastic.
The surface shall tidy and smooth, bubble, impurity are not allowed. But slight scratch and color punctum are allowed. Edge is to be cut smooth. The delamination and crackle on the end surface are not allowed. The surface shall tidy and smooth, bubble, impurity are not allowed. But slight scratch and color punctum are allowed. Edge is to be cut smooth. The delamination and crackle on the end surface are not allowed
♦ High mechanical properties, and oil resistance and certain dielectric property.
♦ Thermal rating is 120, and temperature resistance :130 centidegrees
Application
Chemical machine parts , general machine parts and gear ,and generators, Pads, base, baffle etc.. Generator ,transformer, fixture, inverter, motor and electric insulation component.
Specification
Project |
Uite |
Value |
||||
Density |
g/m³ |
1.3~1.4 |
||||
Vertical layer bending strength(normality) |
MPa |
≥100 |
||||
Tensile strength |
MPa |
≥80 |
||||
Parallel impact strength (Simply supported beam) |
KJ/m2 |
≥7.8 |
||||
Parallel layer shear strength |
MPa |
≥25 |
||||
Adhesive strength |
N |
≥3600 |
||||
Electrical strength |
Vertical layer(in 90℃transformer oil )( thickness 1mm ) |
Kv/mm |
≥5.1 |
|||
Parallel layer breakdown voltage(in 90℃transformer oil) |
kv |
≥20 |
||||
Insulation resistance after water immersion |
Ω |
≥5*107 |
||||
Dielectric constant(1MHz) |
|
≤5.5 |
||||
PTI |
- |
≥100 |
||||
Water absorbing ( thickness 1-20mm) |
mg |
206~406 |
Feature
1.Good ability of insulation
2.Thermal reliability
3.Lower warpage