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Alkali Free E-Glass Fiberglass Cloth High Temperature Insulation Fireproof Glass Fiber Fabric
Our alkali-free E-glass cloth is produced by melting glass raw materials and high-precision weaving. It withstands continuous 500℃ high temperature, with stable size, flame retardant insulation and acid & alkali resistance. Various grammages and weaves are in stock, customizable with PTFE or silicone coating for electronics, fireproof and composite industries. We offer factory direct sales, free testing samples and custom slitting service.
Jul 21st,2026
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Industrial Alkali-Free Fiberglass Cloth For Fire & Electrical Insulation
Main Product Description
Our fiberglass cloth is woven from alkali-free E-glass yarn substrate, which can be compounded with PTFE, silicone and vermiculite coatings. It can withstand continuous high temperature of 500℃ and instantaneous peak temperature of 550℃. It features stable size without deformation, flame retardant & insulation, high tensile & wear resistance, and strong resistance to strong acid and alkali without pulverization or cracking under high temperature.
We have spot stock with gram weight from 30 to 1200g and thickness ranging from 0.03mm to 3.0mm. The width can be arbitrarily cut from 100mm to 2000mm. Custom special cutting and special coating are available. It is widely applied to high-temperature working conditions of electronics, fire protection, pipeline and FRP industries. Factory direct sales, free samples for testing are provided.
Complete Production Manufacturing Process
1. Raw Material Melting
High-purity silica sand, limestone and pyrophyllite are melted at 1400℃+ to form uniform molten E-glass liquid, strictly control alkali content below 0.8%
2. Filament Drawing & Twisting
Molten glass flows through platinum bushing, pulled into micron-level thin filaments, twisted into uniform fiberglass yarn without broken strands
3. Intelligent Warping
Automatic warping machine arranges warp yarn with constant tension, ensure even density of finished cloth
4. Precision Weaving
High-speed air-jet looms weave plain/twill/satin texture, real-time fabric surface inspection during weaving
5. High-Temp Desizing Treatment
High-temperature oven removes surface sizing agent, maximize insulation & resin bonding performance
6. Functional Coating & Curing
Optional PTFE/silicone/vermiculite coating, constant temperature curing to lock coating durability
7. Precision Slitting & Finished Inspection
Automatic slitting machine cuts target width, full inspection of gram weight, tensile strength and heat resistance before rolling
Core Product Advantages
1. Super high temperature resistance, non-combustible & crack-proof under high heat
Stable service at constant 500℃, instant temperature resistance up to 550℃. It will not burn, pulverize or crack under long-term baking and heat insulation working conditions, cutting material replacement cost.
2. Flame retardant & insulating, safe protection for electronics industry
Excellent insulation performance with high breakdown voltage, flame retardant and non-conductive. Used as circuit board substrate and wire harness heat insulation isolation to effectively avoid short-circuit hazards.
3. Acid & alkali corrosion resistance, suitable for harsh chemical environment
Resist erosion of electroplating liquid, diluent, all kinds of strong acid and alkali. No corrosion or damage for long-term use on chemical pipelines and anti-corrosion equipment.
4. High tensile strength & stable dimension, longer service life
The woven glass fiber base has strong toughness, no shrinkage after pulling or repeated high-temperature baking, several times more durable than ordinary chemical fiber heat insulation cloth.
5. Excellent fire & heat insulation, preferred base material for fire prevention
Non-combustible material blocks heat transfer, can be made into fire blankets and pipeline thermal insulation layers to prevent spread of high-temperature open fire.
6. Multiple specifications & coatings, custom processing available
Spot stock of various gram weights and thicknesses, plain/twill/satin weave optional. PTFE, silicone and vermiculite composite coating supported, custom slitting available with fast delivery.
Full Industry Application Scope
1. Electronic PCB & New Energy Industry
Circuit board substrate, lithium battery thermal wrapping, transformer wire harness insulation, high-temperature isolation for precision electronics. Coated versions fit SMT high-temperature processes.
2. Fire Protection & Thermal Insulation Engineering
Industrial fire blankets, equipment fire baffles, high-temperature pipeline wrapping, boiler heat insulation lining to block high temperature and open fire spread.
3. FRP & Composite Material Industry
Release substrate for resin molding, base layer for carbon fiber composite, mold isolation cloth without resin adhesion for easy peeling after forming.
4. Injection Molding & Heat Transfer Printing Equipment
Heat insulation gaskets for hot pressing machines, isolation cloth for heat transfer machines, high-temperature buffer for molds without adhesion to plastic raw materials.
5. Chemical & Hardware Surface Treatment
Isolation layer for electroplating equipment, anti-corrosion lining for acid-base tanks, anti-corrosion wrapping for chemical pipelines to resist all industrial corrosive solvents.
6. Food & Drying Production Lines
Heat insulation interlayer for ovens, heat insulation baffles for drying equipment, non-toxic and non-precipitating for high-temperature equipment protection in food processing.
Factory Strength + Bottom Order Guidance
We are a professional fiberglass fabric manufacturer with more than 10 years of experience. We own automatic weaving and coating composite workshops with sufficient stock rolls and delivery within 48 hours.
Wholesale tiered price for bulk orders, free samples provided for machine testing. OEM private label, custom cutting available, VAT invoices can be issued, logistics delivery nationwide.
Please contact customer service for accurate quotation if you have customized demands on gram weight, thickness, coating and size!
