Productscpzx
PTFE Molded/Skived Sheet/Film
Ⅰ、Features
Polytetrafluoroethylene sheet by suspension polymerization of PTFE resin molding. It has the best chemical resistance in known plastics and does not age. It has the best coefficient of friction in known solid materials and can be used at -180 ° C to +260 ° C without load.
Ⅱ、Specifications:
Ⅲ、Main Properties
Ⅳ、Usage:
Seals and lubricants for use in a variety of media, as well as electrical insulation for use at various frequencies. Capacitor media, wire insulation, electrical instrumentation insulation.
Modified PTFE Sheet Product Introduction
Modified PTFE sheets are enhanced engineering plastic sheets produced by adding various functional fillers to a polytetrafluoroethylene (PTFE) base material and compounding them through special processes. They perfectly retain the excellent chemical stability of PTFE while significantly improving key properties such as mechanical strength, wear resistance, and dimensional stability, making them upgraded alternatives to traditional PTFE sheets.
Core Modification Types & Characteristics
| Modification Type | Main Filler | Key Performance Improvements | Typical Application |
| Glass Fiber Reinforced | Glass Fiber 15-25% | Compressive Strength +200% | High-Pressure Seals |
| Graphite Filled | Graphite Powder 10-20% | PV Value 3x Higher | Oil-Free Lubricating Bearings |
| Carbon Fiber Reinforced | Carbon Fiber 10-15% | Thermal Conductivity Doubled | Electronic Heat Dissipation Components |
| Copper Powder Filled | Copper Powder 40-60% | Conductivity 10⁻³ Ω·cm | Anti-Static Equipment |
Key Performance Parameter Comparison
| Performance Indicator | Pure PTFE Sheet | Glass Fiber Reinforced | Graphite Filled |
| Tensile Strength (MPa) | 14-21 | 25-35 | 18-25 |
| Wear Rate (×10⁻⁶ mm³/N·m) | 5.8 | 1.2 | 0.8 |
| Heat Deflection Temperature (°C) | 55 | 120 | 95 |
| Friction Coefficient | 0.05-0.10 | 0.12-0.18 | 0.08-0.12 |
Product Advantages
· Mechanical Performance Multiplied: Flexural modulus up to 1200 MPa (3 times that of pure PTFE).
· Extended Service Life: Wear resistance improved by 5-8 times.
· Multi-Functional Options: Special types available (conductive/thermal conductive/anti-static).
· Easy Processing: Supports secondary processing like CNC machining and compression molding.
Typical Application Scenarios
1. Chemical Corrosion Protection:
· Reactor Lining Plates (Glass Fiber Reinforced)
· Pipeline Compensators (Graphite Filled)
2. Mechanical Seals:
· High-Pressure Pump/Valve Sealing Rings (Carbon Fiber Reinforced)
· Compressor Piston Rings (Copper Powder Filled)
3. Electronics & Electrical:
· 5G Base Station Insulation Gaskets (Glass Fiber Reinforced)
· Semiconductor Equipment Carrier Plates (High Purity Grade)
Specification Parameters
| Item | Standard Range | Special Customization |
| Thickness | 1-50mm | 0.5-100mm |
| Size | 1000×1000mm | 2000×3000mm |
| Tolerance | ±0.2mm | ±0.05mm |
| Color | White/Black/Gray | Customizable |
Quality Certifications
· FDA 21 CFR 177.1550 (Food Grade)
· UL 94 V-0 Flame Retardant Standard
· RoHS 2.0 Environmental Requirements
· ISO 10993-5 Biocompatibility Test
Selection Suggestions
· Strong Corrosion Environments: Recommend Glass Fiber Reinforced + Surface Polishing.
· Wear Resistance Needs: Choose 25% Graphite Filled type.
· Anti-Static Applications: Use 15% Carbon Fiber Reinforced version.
· Ultra-High Purity: Specify Electronic Grade modified material (Metal ions < 1 ppm).
Note: Sheets of different modification types exhibit anisotropy; filler orientation must be considered during design.
Basic Performance Comparison
| Performance Indicator | Unit | Pure PTFE Sheet | GF Reinforced (20%) | Graphite Filled (15%) | CF Reinforced (15%) | Test Standard |
| Density | g/cm³ | 2.14-2.20 | 2.20-2.35 | 2.15-2.30 | 2.10-2.25 | ASTM D792 |
| Tensile Strength MPa | MPa | 14-21 | 28-35 | 20-26 | 30-40 | ASTM D638 |
| Elongation at Break | % | 200-400 | 100-200 | 150-250 | 80-150 | ASTM D638 |
Mechanical Properties
| Parameter | Unit | Glass Fiber Reinforced | Graphite Filled | Carbon Fiber Reinforced |
| Compressive Strength (10% Def.) | MPa | 45-55 | 35-45 | 50-60 |
| Flexural Modulus | MPa | 900-1100 | 700-900 | 1000-1300 |
| Impact Strength | kJ/m² | 8-12 | 10-15 | 6-10 |
Product Specifications
| Parameter | Standard Specification | Customizable Range |
| Thickness | 1-50mm | 0.5-100mm |
| Size | 1000×1000mm | ≤ 2000×3000mm |
| Tolerance | ± 0.2mm | ± 0.05mm |
| Color | White/Black/Gray | RAL Color Chart Available |
Certification Standards
| Certification Type | Standard Number | Applicable Modification Types |
| Food Grade | FDA 21 CFR 177.1550 | Glass Fiber / Graphite Filled |
| Medical Device | ISO 10993-5 | High Purity Carbon Fiber Reinforced |
| Flame Retardant | UL 94 V-0 | All Types |
Machining Parameters
| Process | Recommended Parameter | Precautions |
| CNC Machining | Speed 8000 rpm, Feed 0.1 mm/tooth | Use Diamond Coated Tools |
| Bonding Treatment | Plasma Treatment + Epoxy Adhesive | Use within 24 hours after treatment |
| Thermoforming | 180-200℃, Pressure 0.3-0.5 MPa | Requires Special Mold |
Application Selection Guide
| Application Scenario | Preferred Modification Type | Alternative Solution | Key Performance Requirement |
| Chemical Seals | 25% Glass Fiber Reinforced | 15% Carbon Fiber Reinforced | Anti-Creep + Corrosion Resistance |
| Oil-Free Bearings | 20% Graphite Filled | Copper Powder Filled | Low Friction + High PV Value |
| Electronic Heat Dissipation | 15% Carbon Fiber Reinforced | Boron Nitride Filled | High Thermal Conductivity + Insulation |
| Anti-Static Equipment | 15% Carbon Fiber Reinforced | 20% Graphite Filled | Surface Resistance 10⁴-10⁶ Ω |
