SHS Prepreg For Transformer Component

SHS prepreg for transformer component is a high-performance glass fiber-based prepreg material. SHS stands for Super High Strength. It is manufactured by impregnating epoxy resin onto non-alkali glass fiber cloth substrates to form B-stage semi-cured sheets, which form high-strength insulation structural parts after heating and pressurizing for curing. Unlike the organic substrates of DMD prepreg, glass fiber cloth is an inorganic material with non-combustible properties, higher temperature resistance and extreme mechanical strength. After curing, its bending strength reaches 450MPa, several times higher than ordinary prepreg, making it ideal for load-bearing and flame-retardant positions within transformer accessories.

Mining transformers impose stringent requirements on insulation materials: simultaneous flame retardancy, vibration resistance and temperature resistance. A mining transformer manufacturer previously used standard DMD prepreg for end fixation, which tended to crack under intense underground vibration. We recommended SHS prepreg, whose tensile strength of glass fiber cloth is five times that of DMD substrates. The customer passed vibration testing on the spot and now exclusively uses our SHS for all mining transformers. Actual test data shows that cured SHS delivers insulation resistance of 10¹³ ohms and breakdown voltage of 20kV/mm, with all indicators far exceeding ordinary prepreg standards. For distributors supplying transformer accessories, SHS prepreg serves as a gateway to high-end mining and traction transformer markets – high technical barriers limit competing manufacturers, creating smaller competition and larger profit margins.

• Insulation structural parts of mining transformers
• End insulation fixation of traction motors
• Insulation structural parts of wind power generators
• Insulation cladding of busbars
• Transformer accessories requiring high-strength insulation

The core quality determinants of SHS prepreg lie in glass fiber cloth resin content control and uniform resin impregnation. Our impregnation production lines adopt precision metering pumps to control resin flow, restricting resin content error within ±3%, far superior to the industry average tolerance of ±8%. During production, gel time and resin flow rate are sampled hourly for consistent curing characteristics of finished products. After curing, three core tests are conducted for bending strength, breakdown voltage and flame retardancy, with products only released upon passing all tests. The glow wire test instrument is calibrated daily, and UL94 V0 flame retardancy grade testing is mandatory for every batch. The company holds ISO9001 certification, with test reports accompanying each shipment.

Our SHS prepreg has been tested by authoritative testing institutions, with all performance indicators meeting national standards. The company holds ISO9001 quality management system certification, and flame retardancy reaches UL94 V0 grade. The glass fiber substrate adopts Grade A non-alkali glass fiber cloth, while pure epoxy resin free of fillers complies with RoHS and REACH environmental requirements, with relevant test reports available upon request. We support third-party factory inspections and sample testing by designated institutions. For projects requiring special certifications, we can coordinate dedicated testing and certification services.

Standard SHS prepreg follows a payment term of 30% advance payment with 70% balance settled before delivery. Customized products requiring special thicknesses, glass fiber cloth specifications or resin formulas involve dedicated raw material procurement and process adjustments, requiring 50% advance payment and 50% balance prior to shipment. We accept settlement in RMB and USD. Tiered pricing applies to large-volume long-term orders, with unit prices decreasing as purchase quantity increases. We prioritize long-term cooperation with transparent and fair pricing, rejecting inflated quotations for uninformed customers.

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