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Made of high-quality substrate with precise dot glue technology, this heat-resistant insulating dot glue paper features excellent high temperature resistance, high insulation, voltage resistance and flame retardancy. It has flexible texture and high flatness with moisture-proof and aging-resistant performance, ensuring stable electrical isolation and effectively avoiding short circuit and electric leakage risks. It is widely used for insulation isolation and reinforcement fixation of various motors, transformers and electrical equipment, serving as a high-quality substrate for industrial electrical insulation.  

Standardized rhombus dot gluing process with uniform and delicate coating ensures smooth oil intake and air exhaust and superior insulation performance. It features strong adhesion after high-temperature curing, which can firmly fix the transformer winding structure, resist operation vibration and pressure, and avoid insulation failure. Suitable for long-term operation of industrial power equipment with complete specifications, stable batches and customized services available.  

Engineered for premium electrical insulation, our DMD epoxy prepreg adopts a 3-layer polyester composite structure with precise epoxy pre-impregnation technology. Supporting F-class 155°C continuous high-temperature operation, it delivers ultra-high dielectric strength, excellent mechanical strength and anti-aging performance. Flexible, easy to process and dimensionally stable, it solves the insulation pain points of high temperature, high voltage and frequent operation of electrical equipment. Ideal for transformers, motors and generators, it ensures safe, stable and long-term operation of electrical systems.

Core Product Features： 1. Superior Insulation Performance: The base material adopts high-purity insulating raw materials, with high voltage resistance and low conductivity, which can effectively isolate current, prevent electric leakage and short circuit, and ensure the safe operation of electrical equipment. 2. Unique Diamond Grid Anti-slip Design: The regular diamond grid dot glue structure increases the friction coefficient, providing outstanding anti-slip positioning effect. It can firmly fit the installation surface without displacement, solving the sliding problem of flat insulating paper. 3. High Temperature & Aging Resistance: Made of high-quality heat-resistant materials, it can maintain stable insulation and adhesion performance in long-term high-temperature working environments, not easy to deform, age or fall off, and extend the service life of equipment. 4. Waterproof & Anti-static: The surface coating has excellent waterproof and moisture-proof properties, preventing insulation failure caused by humid environment. Meanwhile, the anti-static function avoids static accumulation and damage to precision electronic components. 5. Easy Processing & Wide Adaptability: The paper body is tough and easy to cut, fold and paste without breaking or chipping. It has strong fitting performance for curved surfaces and irregular parts, meeting various industrial processing and installation needs.

Product Introduction： DDP Diamond Dotted Paper is manufactured by coating modified high temperature resistant epoxy resin in diamond grid pattern on high-performance electrical cable paper, semi-cured after baking. It is F/H grade thermal insulation material widely used for oil immersed power transformer interlayer and turn insulation. The unique diamond dot coating reserves oil flow channels, allowing full penetration of insulating oil and rapid exhaust of internal gas during vacuum drying, effectively restraining partial discharge and corona, greatly improving transformer operation safety. When heating during coil curing, epoxy dots melt and solidify to bond winding layers tightly, preventing winding displacement and short circuit caused by electromagnetic force.

Our insulation pull strips (I-beam vent stays) are manufactured by continuous pultrusion process with E-glass fiber reinforced epoxy resin, designed as core insulation support components for dry-type transformers, reactors and power electrical equipment. Product Advantages Superior Electrical Insulation   Class F / H thermal resistance, high dielectric strength, low dielectric loss, excellent tracking resistance, stable insulation performance under high voltage. Ultra High Mechanical Performance   Unidirectional fiber layout provides outstanding compressive, bending and impact resistance, no deformation under long-term load, far stronger than pressboard spacers. Optimized Heat Dissipation   I-shaped cross-section forms natural cooling channels, uniform heat dissipation to reduce transformer temperature rise. Long Service Life   V0 flame retardant, acid & alkali corrosion resistant, low water absorption, no crack in damp or oil environment. Customization Available   Custom width, thickness, length and special cross-sections, cut-to-length service, fast mold opening for special specifications.

SHS Epoxy Prepreg Insulation Material | Class H 180°C For Dry Type Transformer： SHS Prepreg is B-stage semi-cured composite material, composed of polyimide heat-resistant non-woven fabric impregnated with Class H modified epoxy resin, heat-treated for stable storage and easy winding processing. Rated Class H thermal resistance (180°C), widely used as interlayer & ground insulation for foil winding dry-type transformers, and turn/slot insulation for H-class high-temperature motors, reactors and electrical appliances.

Custom Processing Service： Precision CNC cutting, slotting, drilling, rolling, bending, die cutting & chamfering Custom shapes: oil duct strips, angle rings, pressure rings, insulation barriers, support blocks, insulation tubes, washers Thickness range: 0.3mm–60mm, Grade 3.1 normal density & Grade G4 high pre-compressed density Accept OEM & ODM, support DXF/DWG drawing customization, small & bulk orders available

Transformer insulation crepe paper tubes are spirally wound from high-purity electrical crepe kraft paper, widely used for lead, tap, screw insulation inside oil-filled transformers, current & voltage transformers. Excellent flexibility, bend without collapse or crack, easy assembly for complex winding layout Porous crepe structure with high oil absorption, form stable oil-paper composite insulation, boost dielectric strength Class A thermal resistance (105℃), free of conductive impurities, long service life under high voltage Full custom sizes: inner diameter, wall thickness, length available, tight dimensional tolerance Compliant with IEC 60554, pass SGS & RoHS test, suitable for global transformer manufacturing export

NMN6640 Nomex-Mylar-Nomex 3-Ply Composite Insulation Paper NMN6640 is a three-layer flexible composite insulation laminate, constructed with two outer layers of DuPont Nomex aramid paper and a middle core of PET Mylar polyester film, bonded by high-temperature acid-free adhesive. Rated Class F (155°C) and Class H (180°C, continuous 180°C working temperature), it complies with GB/T 5591.3 and IEC international electrical insulation standards.   As an upgraded alternative to traditional DMD insulation, NMN6640 delivers superior thermal stability, dielectric performance and mechanical toughness, widely adopted in heavy-duty motors, dry-type transformers and new energy traction equipment worldwide.

Our PET insulation coaming board is made of high-performance biaxially oriented PET polyester film via composite hot pressing, Class F thermal resistance (155℃). It serves as core inner insulation support for windings of dry-type transformers, reactors and electrical motors, widely replacing traditional insulation paper with better insulation stability and longer service life, complying with IEC & GB electrical insulation standards.

Product Introduction： Prepreg DMD is a three-layer flexible composite insulation material impregnated with modified high-temperature epoxy resin and baked to B-stage semi-cured state. The substrate is composed of two layers of polyester non-woven fabric and one polyester film in the middle, presenting uniform red appearance, Class F thermal resistance up to 155℃.

Our I-shaped pultruded insulation strip is made of alkali-free fiberglass and thermosetting resin by pultrusion process. It features excellent insulation, high mechanical strength, fire resistance, arc resistance and corrosion resistance. Widely used for insulation, support and ventilation of dry-type transformers, reactors and other electrical equipment. Custom sizes are available.

Diamond Dotted Paper (DDP) is made of high-grade electrical insulating paper coated with special modified epoxy resin in regular rhombic pattern. It features excellent dielectric property, mechanical strength, heat resistance and oil resistance, widely used as key insulation material for oil-immersed power transformers and large & medium-sized electric motors. When heated, the diamond-shaped adhesive dots melt to bond adjacent layers and then cure completely with rising temperature, firmly fixing transformer windings. It greatly improves the anti-short-circuit and anti-impact performance of coils. The non-glued areas ensure superior oil permeability to keep stable insulation performance. Available in various thicknesses and widths, with uniform glue distribution and smooth feeding, perfectly compatible with automatic winding machines. Ideal for turn-to-turn, interlayer and coil end insulation of transformers.

Our insulation crepe paper is made of 100% high-purity sulfate insulating wood pulp with professional creping process. Free of conductive particles, it features excellent dielectric strength, great flexibility and elongation. The special creped structure enables perfect fitting for irregular components, winding wrapping and interlayer filling, effectively relieving stress caused by thermal expansion, contraction and vibration. With Class A heat resistance up to 105℃, it has excellent compatibility with various insulating oils. Widely used in oil-immersed transformers, instrument transformers, reactors and power bushings. Custom sizes are available to meet diverse insulation requirements for electrical equipment.

Our pre-impregnated insulation mesh cloth is produced with high-quality fiberglass mesh and special insulating resin. It features excellent electrical insulation, high temperature resistance, flame retardancy, high mechanical strength and long service life. With uniform grid structure and good flexibility, the cloth fits tightly on components and maintains stable insulation performance for a long time. Widely used for layer insulation and structural reinforcement of dry-type transformers, motors, mutual inductors, power distribution cabinets and other electrical facilities. We provide standard sizes and customized specifications. Strict quality control ensures all products meet international electrical standards. Welcome bulk orders and OEM requirements.

DMD Epoxy Prepreg (Class F, 155°C) is a three-layer composite insulation material consisting of polyester non-woven fabric (D) / polyester film (M) / polyester non-woven fabric (D), impregnated with modified epoxy resin and pre-cured to B-stage. It features high dielectric strength (≥40MV/m), excellent mechanical strength, low shrinkage, and strong adhesion to copper/aluminum foil. With long shelf life at room temperature and fast curing under heat, it is ideal for dry-type transformer low-voltage coil interlayer insulation, Class F motor slot/turn-to-turn insulation, and electrical equipment insulation. Available in thicknesses from 0.15mm to 0.40mm, with slitting, die-cutting, and custom processing services provided.

This film takes high-strength polyester film as the base material, coated with modified high-temperature resistant epoxy resin in regular diamond dot pattern. It is semi-cured at normal temperature and will melt and cure when heated, providing excellent adhesion to fix windings firmly and avoid displacement and short circuit. The unique diamond grid structure forms open channels for rapid air exhaust and oil penetration, effectively restraining corona discharge and partial discharge. Featuring high dielectric strength, low dielectric loss, heat resistance and ageing resistance, it maintains stable insulation performance for long-term operation. Widely used for interlayer and turn insulation of oil-immersed transformers, dry-type transformers and current/voltage transformers, also applicable to anti-corona insulation of high-voltage motors and electrical appliances. Custom thickness and width are available.

Oil duct spacer curtain is a core insulation & heat dissipation component applied in layer winding of oil-immersed power transformers. It is assembled with high-density transformer pressboard / laminated wood spacers bonded with grid dot adhesive insulation paper via eco-friendly insulating glue. Spacers are arranged equidistantly to form fixed and regular oil circulation channels, an ideal upgrade to traditional corrugated oil duct board.

Product Description： Product Overview:​ Epoxy-Impregnated Fiberglass Mesh Cloth is an advanced electrical insulation solution engineered for transformers, motors, and high-voltage electrical applications. Constructed from woven fiberglass fabric saturated with high-quality epoxy resin, it delivers a balanced combination of robust mechanical properties and exceptional dielectric performance. Its open-weave design ensures uniform insulation distribution, improves structural integrity, and provides reliable resistance to thermal, electrical, and mechanical stress, ensuring consistent performance in challenging operating conditions. Key Attributes:​ This electrical-grade fiberglass mesh cloth exhibits remarkable durability, with strong resistance to heat, humidity, oils, and chemical exposure. Its adaptable yet strong nature allows for straightforward cutting, stacking, and fitting, all while preserving dimensional accuracy and shape stability. Structure and Performance:​ Fabricated from alkali-resistant or alkali-free fiberglass yarns in a consistent grid weave, this flexible and high-strength insulating material provides superior dielectric characteristics, thermal stability, and corrosion resistance.Mesh cloth is commonly employed as both a reinforcing element and an insulating layer in electrical apparatus and composite insulation systems, contributing to enhanced reliability and extended service life.