Product Specifications:
Thickness | Width |
0.03-0.15mm | 510-1500mm |
Product Color: Can be customized according to customer needs (minimum order quantity is 6 tons).
I. Product Introduction:
Our factory produces electrical polyester fiber nonwoven fabric (7031), which is made from polyester staple fiber (PET) using a thermal bonding method and mechanically carded into a web, resulting in oriented fiber distribution.
It features high heat resistance, excellent impregnation and dielectric properties, a uniform and smooth fabric surface, small thickness deviation, high tensile strength, and a neat appearance.
II. Specific Requirements:
1. Appearance:
The surface of the nonwoven fabric should be uniform and flat, neatly rolled, and free from damage and contamination. Neps and fiber bundles are permissible within the thickness tolerance range.
2. Dimensions:
(1) 7031 nonwoven fabric is supplied in rolls, each roll having a diameter of not less than 250mm, with no more than three sections per roll, the smallest section being not less than 100mm, and each section clearly marked. The inner diameter of the paper tube is 76mm.
(2) The maximum width of 7031 nonwoven fabric is 1560mm, with a permissible deviation of ±5mm.
(3) The thickness and permissible deviation of 7031 nonwoven fabric should conform to the provisions of Table 1.
(4) Other sizes and specifications of nonwoven fabric can be specified according to the contract.
(5) The physical and mechanical properties of the nonwoven fabric should conform to the relevant provisions of Table 1.
Table 1
Number | Performance | Unit | Required nominal thickness (mm) | 0.03 | 0.035 | 0.04 | 0.05 | 0.06 | 0.07 | 0.08 | 0.1 | 0.12 | 0.13 | 0.15 | |
1 | Quantitative | g/㎡ | 21 | 24 | 28 | 35 | 42 | 49 | 56 | 70 | 85 | 91 | 100 | ||
2 | Quantitative Inequality | ％ | ≤10 | ||||||||||||
3 | Apparent density | g/cm² | 0.65±0.10 0.70±0.10 | ||||||||||||
4 | Tensile strength | Vertical | N/50mm | ≥30 | ≥35 | ≥40 | ≥60 | ≥70 | ≥80 | ≥90 | ≥100 | ≥150 | ≥200 | ≥240 | |
Horizontal | Width | ≥6 | ≥8 | ≥10 | ≥20 | ≥22 | ≥25 | ≥27 | ≥30 | ≥50 | ≥70 | ≥100 | |||
5 | Elongation at break | Vertical | ％ | ≥6 | ≥6 | ≥6 | ≥6 | ≥6 | ≥8 | ≥8 | ≥10 | ≥10 | ≥10 | ≥10 | |
Horizontal | ％ | ≥3 | ≥3 | ≥3 | ≥3 | ≥3 | ≥5 | ≥5 | ≥5 | ≥5 | ≥8 | ≥8 | |||
6 | Thermal shrinkage rate | ％ | ≤4 ≤3 | ||||||||||||
Remark | Heat shrinkage test conditions：150℃，1 hour | ||||||||||||||
III. Physical and Mechanical Properties of 7031 Nonwoven Fabric
1. Packaging: Each roll of nonwoven fabric is wrapped in a plastic film, then an outer waterproof woven bag. The ends of the core are sealed with corresponding plastic cores. The inner tube is a 1.8cm thick high-pressure paper tube.
2. Marking: The outer packaging bag should be marked with the manufacturer, product name, model, specifications, batch number, net weight, production date, etc.
3. Storage: 7031 nonwoven fabric should be stored in a cool, dry, clean, and well-ventilated warehouse below 40℃. It should not be near fire sources or heating, and should not be exposed to direct sunlight. The shelf life is one year.
IV. Scope of application:
Widely used in composite materials (DMD, DM, DMDM), mica tape reinforcing materials, electrical laminates, insulating varnish cloth base fabric, and end wrapping of electrical appliances, transformers, and motor coils. It is also suitable for small and flexible cables, household electrical cables, communication optical cables, and can replace various types of paper insulation materials.
Insulating Nonwoven Fabric is a high-performance material specifically engineered for electrical, thermal, and mechanical insulation applications. Unlike traditional woven or knitted fabrics, nonwoven fabrics are manufactured by bonding fibers directly through methods such as thermal bonding, needle punching, or hydroentangling. This unique structure provides uniform thickness, excellent tensile strength, and superior dielectric properties, making it ideal for demanding electrical and industrial applications.
Primarily made from synthetic fibers like polyester (PET) or polypropylene (PP), insulating nonwoven fabric is lightweight, flexible, and durable. It can be customized in terms of thickness, density, and surface finish to meet the specific requirements of various applications. Key features of insulating nonwoven fabrics include high thermal resistance, moisture and chemical stability, flame retardancy, and dimensional stability.
Insulating nonwoven fabric is widely used in transformers, motors, generators, switchgear, automotive electrical systems, and industrial machinery. It can also be used for thermal insulation, cushioning, and protective layers. With growing emphasis on sustainable manufacturing, many insulating nonwoven fabrics are recyclable, energy-efficient, and compliant with environmental regulations such as RoHS and REACH.
The performance of insulating nonwoven fabrics is determined by their fiber composition, manufacturing method, and physical properties. Typical specifications include:
Material Composition: 100% polyester (PET), polypropylene (PP), or blends
Manufacturing Process: Thermal bonding, needle punching, spunbonding, or hydroentangling
Fabric Weight: 40 g/m² – 400 g/m², adjustable according to application needs
Thickness: 0.2 mm – 5 mm, customizable for insulation, protection, or cushioning
Fiber Orientation: Random or predominantly oriented for mechanical strength
Tensile Strength: High longitudinal and transverse strength
Dielectric Strength: Excellent electrical insulation performance
Thermal Resistance: Continuous operation up to 150°C
Moisture Absorption: Low water retention to preserve insulation properties
Flame Retardancy: Optional flame-retardant variants
Color: Natural white, grey, or customizable colors
Eco Compliance: Recyclable, RoHS and REACH compliant
These parameters ensure that insulating nonwoven fabrics deliver consistent performance and reliability in electrical, industrial, and thermal applications.
Insulating nonwoven fabric is widely used across multiple industries due to its versatility, thermal stability, and dielectric properties:
Insulation for transformers, motors, and generators
Dielectric barriers in high-voltage equipment
Winding insulation and separation layers
Thermal protection for power supply units, battery packs, and electronic devices
Insulation for electric and hybrid vehicle batteries
Wiring harness protection and thermal barriers
Soundproofing and vibration damping
Cabin air filters and interior insulation
Electrical panel and machinery insulation
Protective layers in industrial equipment
Reinforcement in composite materials requiring electrical isolation
Air and liquid filtration with dielectric safety
Oil absorption pads and industrial spill control
Cleanroom and laboratory insulation materials
Insulation in chargers, adapters, and electronic devices
Heat-resistant protective layers for sensitive components
Flame-retardant fabrics for fire-safe installations
Moisture-resistant insulation for humid environments
High-temperature insulation for industrial machinery and power generation
This versatility makes insulating nonwoven fabric an essential material in industries where safety, reliability, and durability are critical.
Proper handling and installation of insulating nonwoven fabrics ensure optimal performance:
Cutting and Shaping:
Use sharp scissors, rotary cutters, or laser cutters for precise edges. Avoid stretching or pulling to maintain fiber integrity and dielectric properties.
Layering and Lamination:
Stack multiple sheets according to voltage rating and thickness requirements. Adhesive bonding or heat lamination may enhance structural stability.
Cleaning:
Keep fabric free from dust, oil, and chemical contamination. Use compressed air or soft brushes for cleaning.
Storage:
Store rolls in a cool, dry, ventilated environment, away from sunlight, high humidity, and extreme temperatures. Proper storage preserves mechanical and electrical properties.
Safety Precautions:
Wear gloves when handling large rolls. Avoid inhaling fine fibers during cutting or processing, although most synthetic fibers are non-toxic.
Q1: What distinguishes insulating nonwoven fabric from traditional woven or paper insulation materials?
A1: Insulating nonwoven fabric has a uniform structure, high tensile strength, excellent dielectric properties, and flexibility. Unlike paper or woven fabrics, it can be produced in large sheets, customized for thickness, density, and flame-retardant properties.
Q2: Can insulating nonwoven fabric be customized for specific electrical applications?
A2: Yes. Weight, thickness, fiber type, surface treatment, and flame retardancy can all be tailored to meet particular insulation requirements.
Q3: Is insulating nonwoven fabric flame-retardant?
A3: Standard fabrics are heat-resistant, and flame-retardant variants are available for applications requiring fire safety compliance.
Q4: Can it withstand high humidity or harsh industrial conditions?
A4: Yes. Polyester and polypropylene insulating nonwoven fabrics have low moisture absorption and are chemically stable, making them suitable for challenging environments.
Q5: Is this material environmentally friendly?
A5: Many insulating nonwoven fabrics are recyclable, RoHS and REACH compliant, and produced using energy-efficient manufacturing processes.
Q6: How should insulating nonwoven fabric be installed for optimal insulation?
A6: Layers should be stacked according to design specifications. Optional adhesive or heat bonding may enhance stability, and care should be taken to avoid compressing the fabric excessively.
Q7: Can insulating nonwoven fabric be used in automotive electrical systems?
A7: Absolutely. Its thermal resistance, mechanical strength, and flexibility make it ideal for battery insulation, wire harness protection, and motor insulation in vehicles.
Lightweight, strong, and flexible
High tensile strength and mechanical durability
Excellent thermal resistance and dimensional stability
Low moisture absorption and chemical resistance
Customizable properties for specific applications
Flame-retardant and high-temperature variants available
Eco-friendly and recyclable
Versatile across electrical, automotive, industrial, and consumer applications
Insulating Nonwoven Fabric is a versatile, high-performance material designed for electrical, thermal, and mechanical insulation applications. Its unique combination of uniform fiber structure, dielectric properties, mechanical strength, and thermal stability makes it indispensable in transformers, motors, generators, automotive systems, industrial machinery, and consumer electronics. Proper handling, installation, and storage ensure long-term durability and optimal performance. With customizable specifications, flame-retardant options, and environmentally friendly production, insulating nonwoven fabric is a leading choice for manufacturers, engineers, and designers seeking reliable, lightweight, and high-quality insulation solutions.
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