Transformer related electrical laminated products

Electrical laminated products are insulating materials of layered structure made of paper, cloth and wood veneer as a substrate, dip coated with different adhesives, and hot pressed or rolled. Electrical laminates mainly include laminated boards, ……

Electrical laminated products are insulating materials of layered structure made of paper, cloth and wood veneer as a substrate, dip coated with different adhesives, and hot pressed or rolled. Electrical laminates mainly include laminated boards, laminated wood, laminated tubes, rods, capacitor ceramic dies and other special materials. The properties of the laminates depend on the nature of the substrate, adhesive and the molding process.

1. ZTELEC’s laminated glass cloth board

The laminated glass cloth board is made of silane-treated alkali-free glass cloth as a substrate, dipped, baked, and hot pressed. Depending on the resin to be immersed, it can be divided into glass cloth sheets of different heat resistance grades. Commonly used in transformer products are: epoxy glass cloth board, silicone glass cloth board, bismaleimide laminated glass cloth board and modified diphenyl ether glass cloth board.

2. ZTELEC’s epoxy glass cloth board

epoxy board

The adhesive resin used in the epoxy glass cloth board (3240) is an epoxy phenol resin. It has high mechanical strength, electrical properties, good heat and moisture resistance, and has good machinability. The heat resistance grade belongs to B and F grades. It’s mainly used for air gap struts, air gap blocks, iron yoke pads and partitions of B and F dry transformers.

3. ZTELEC’s silicone glass cloth board

silicone glassfiber sheet

3250 silicone epoxy laminated glass cloth board is a silane-treated alkali-free glass cloth impregnated with silicone epoxy resin, baked, dried, hot pressed and processed to form a heat-resistant grade H board.

4. ZTELEC’s modified diphenyl ether glass cloth board

The modified diphenyl ether glass cloth board is made by electrical alkali-free glass cloth impregnated with diphenyl ether resin, and then baked and hot pressed. The board has good mechanical properties and electrical properties after water immersion, and the heat resistance grade is H grade. At present, the H-class dry-type transformer generally uses 9331 modified diphenyl ether glass cloth board as air gap struts and air gap blocks, iron blocks and phase spacers, etc.

5. ZTELEC’s bismaleimide laminated glass cloth board

9334 bismaleimide laminated glass cloth board is made of glass cloth dipped in bismaleimide resin, baked and hot pressed. It has high mechanical and dielectric properties, good moisture resistance and processability, and its heat resistance grade is H grade.

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