phenolic Cotton Cloth Laminated Sheet

The phenolic cotton cloth laminated sheet is made of phenolic resin and cotton cloth and it has good electric performance and mechanical property under normal condition,They are fit for insulating parts which need certain mechanical performance and electric performance for machine, motors and electrical apparatus and they can also be used for the transformer oil. Technical Parameter of Phenolic cotton cloth Laminated Sheet: Phenolic Cotton Cloth Laminated SheetPropertiesUnitGrade30253025D302630273028Flexural strength perpendicular to laminations ≥Mpa10012011090120Bonding strength ( ≥ 10mm in thickness) ≥N----------Impact strength parallel to laminations (Charpy) ≥Kj/ m28.8--77.86Insulation resistance after immersion in water (D-24/23) ≥Ω--1.0 × 10 71.0 × 10 65 × 10 75 × 10 7Dielectric strength perpendicular to laminations (in 90 ± 2 Centigrade transformer oil, 1 mm in thickness) ≥MV/m0.8210(20 ± 5 )0.825.16.3Breakdown voltage parallel to laminations (in 90 ± 2 Centigrade transformer oil) ≥KV114(20 ± 5 )11820Permittivity (48-62Hz) ≤--------5.55.5Densityg/cm 3(1.30-1.40)(1.30-1.45)(1.30-1.40)(1.30-1.40)(1.30-1.40)Water absorption (D-24/23,1.6mm in thickness) ≤mg220200220145145Color--NaturalReference standard--JB/T8149.1-2000(3025D is Enterprise Standard)Characteristics & Applications:1. 3025: Mechanical applications(coarse weave), with poor electrical properties.2. 3025B, 3025C, 3025CS: Mechanical applications; are economical products of 3025; 3025CS has abrasion proof property, but it is not recommended to be used as insulation material.3. 3025D: Mixed mode backing material, can substitute for some cotton cloth laminate.4. 3026: Mechanical properties(fine weave), poor electrical properties, good machining performance.5. 3027: Mechanical and electrical applications(coarse weave), better electrical properties than other phenolic cotton cloth laminates.6. 3028: Mechanical and electrical applications (fine weave), better electrical properties than other phenolic cotton cloth laminates.