Motor /Transformer Insulation Board
This production line is specifically designed for manufacturing insulating parts, insulating boards, insulating paper, and soft composite materials for electrical equipment such as transformers, motors, reactors, transformers, and switch cabinets. Through resin impregnation, drying, pre-curing / complete curing processes, the materials are endowed with key insulating properties such as high electrical strength, high heat resistance, resistance to moisture, resistance to oil, high mechanical strength, and stable dimensions.
Applicable Materials and Products of Motor /Transformer Insulation Board
(1) Applicable Substrates
Insulating cardboard (electrical wood pulp paper)
NOMEX aramid paper
Glass fiber cloth / fiberglass mat
Polyester fiber non-woven fabric
Soft composite materials (DMD, NHN, H grade composite paper)
(2) Applicable Resins
Epoxy resin (EP)
Phenolic resin (PF)
Unsaturated polyester
Organic silicone resin (high-temperature resistant)
Polyurethane, melamine resin
(3) Final Products
Epoxy board (3240, FR-4 insulating board)
Phenolic paper board (electrolytic paper-based insulating board)
Transformer support rods, pads, end rings, insulating parts
Motor slot insulation, phase-to-phase insulation, spacer insulation
Flexible insulating composite materials (DMD, NHN, etc.)
Production process of Motor /Transformer Insulation Board
(1) Automatic unwinding
Insulation paper / aramid paper / fiberglass fabric unwinding, constant tension control, no stretching, no deformation.
(2) Impregnation and gluing
Impregnation in the glue tank or roller coating, resin fully penetrates the substrate, ensuring uniform resin content.
Precise metering roller controls the amount of glue, ensuring consistency of electrical performance.
(3) Gradient drying and curing
Multi-zone hot air oven, completing:
Solvent evaporation
Resin pre-curing (stage B) or complete curing (stage C)
Control: volatile matter, curing degree, gel time, dielectric properties.
(4) Cooling and shaping
Cool to room temperature, stabilize size, prevent warping.
(5) Online inspection
Thickness, weight, appearance, breakdown strength sampling inspection.
(6) Rolling / Cutting / Stacking
The finished product is a roll or sheet insulation board / insulation paper.
Key features of the equipment of Motor /Transformer Insulation Board
(1) High electrical performance guarantee
The adhesive quantity is uniform, without bubbles or white spots, ensuring high breakdown voltage, low dielectric loss, and reliable insulation.
(2) Wide heat resistance range
(3) Resistant to heat, moisture, and aging
Suitable for transformer oil-immersed environments, high-humidity environments, and long-term high-voltage operation.
(4) Low tension, no damage to the substrate
Specially suitable for brittle, thin, and easily stretchable insulating paper and aramid paper, continuous paper without wrinkling.
(5) Can be used as prepreg (B grade) or fully cured insulating board (C grade)
Pre-preg: Subsequently, it is hot-pressed into a thick insulating board.
Fully cured: It can be directly used as a thin insulating board.
(6) Environmentally friendly, energy-saving, safe and stable.
The exhaust gas is centrally treated, and the hot air circulation achieves energy conservation. It is suitable for 24-hour continuous production.
