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              1. Chang Zhou Haipu Insulation Co., ltd.
                  Home|   Company Profile  |  Product Show |  Equipment  |  Honors  |  Contact Us  |  Chinese
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                Fiberglass Insulation Tape
                Fiberglass Mesh
                F Level DMD
                F Level Prepreg for Dry Type Transformer
                NMN polyester film aromatic fiber
                  paper soft composite material
                GHG Composite Material
                Polyimide film aromatic polyamide
                  fiber soft composite materials
                 Chang Zhou Haipu Insulation Co., ltd.
                 Add:Changzhou City, Jiangsu Province Cheng Town Garden Village

                F-grade prepreg for dry-type transformer

                Product Features

                   This product is soft composite material made up of three-layer composite material of polyester thin film pasted by high melting point polyester fiber non-weaving mesh on both two sides. Then it is dipped by modified epoxide resin with high temperature resistance and dried into half curing state . Heat resistance level: F grade.The product has good mechanical properties, electrical properties , paste properties and processing performance

                Product model: 6440

                   6440 prepreg material is suitable for the F grade dry-type transformer as low-voltage coil layer insulation and sealing insulation.

                Product main technical indicators

                   The quality of the 6440 product meets the national standards JB/T10942-2010, its main technical indicators is in the following table

                NO. Index Unit Parameter
                1 Nominal Thickness mm





                0.30 0.40
                2 Thickness Tolerance mm ±0.02 ±0.03 ±0.03 ±0.04
                3 Vertical Tensile Strength (No Bending) N/10mm
                ≥80 ≥100 ≥100
                4 Breakdown Voltage KV ≥7.0 ≥8.0 ≥10.0 ≥10.0
                5 Volatile Content % ≤1.5
                6 Soluble Resin Content g/m2 ≥45
                7 Tensile Shear Strength Mpa ≥3.0
                8 Temperature Index(TI)   ≥155

                Note: (1) The special specifications of the products are decided by both parties of supply and demand.

                    (2). Recommended curing conditions: 130 ℃ : 5 h or 140 ℃ : 4 h or 150 ℃ : 3 h.


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