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.

Filled PTFE Skived Sheet Product Introduction

Filled PTFE skived sheets are high-performance engineering plastic sheets produced by adding functional fillers to pure PTFE resin, followed by compression molding, sintering, and precision skiving. This product perfectly combines the excellent chemical stability of PTFE with the enhanced characteristics of fillers, making it an upgraded replacement for traditional sealing materials.

Core Advantages

· Customizable Performance: Adjusting filler type (glass fiber/graphite/carbon fiber, etc.) and proportion (5%-60%) allows for targeted improvements in mechanical strength, wear resistance, or thermal conductivity.

· Precision Machining: Thickness tolerance up to ±0.05mm, surface roughness Ra 0.8-1.6μm (Fine-skived grade).

· Exceptional Durability: Minimum wear rate as low as 0.3×10⁻⁶ mm³/N·m, service life extended by 3-5 times.

· Multi-functional Integration: Combines corrosion resistance (withstands 98% sulfuric acid), self-lubrication (μ=0.05-0.15), and insulation (>10¹⁴ Ω·cm) properties.

Core Filler Types & Characteristics

Filler Type	Content Range	Key Enhancement Effect	Typical Application Scenario
Glass Fiber	15-25%	Mechanical Strength +200%	Mechanical Strength +200%
Graphite	10-20%	PV Value 3x Higher	Oil-Free Lubricating Bearings
Carbon Fiber	10-15%	Thermal Conductivity Doubled	Electronic Heat Dissipation Components
Bronze Powder	40-60%	Conductivity 10⁻³ Ω·cm	Anti-Static Equipment

Key Technical Parameters

Performance Indicator	Unit	Glass Fiber Reinforced	Graphite Filled	Test Standard
Tensile Strength	MPa	28-35	20-26	ASTM D638
Compressive Strength	MPa	45-55	35-45	ASTM D695
Friction Coefficient	-	0.12-0.18	0.08-0.12	ASTM D1894
Volume Resistivity	Ω·cm	>10¹⁶	10⁴-10⁶	ASTM D257

Product Specifications

Parameter	Standard Range	Precision Grade
Thickness	0.5-50 mm	0.1-100 mm
Size	≤ 1500×1500 mm	≤ 2500×3000 mm
Tolerance	± 0.1 mm	± 0.05 mm
Surface Roughness	Ra 1.6-3.2 μm	Ra 0.8-1.6 μm

Basic Characteristics Comparison

Mechanical Properties

Parameter	Unit	GF Reinforced	Graphite Filled	CF Reinforced	Test Standard
Tensile Strength	MPa	28-35	20-26	30-40	ASTM D638
Comp. Strength (10% def.)	MPa	45-55	35-45	50-60	ASTM D695
Flexural Modulus	MPa	900-1100	700-900	1000-1300	ASTM D790
Impact Strength	kJ/m²	8-12	10-15	6-10	ASTM D256

Friction & Wear Performance

Test Condition	GF Reinforced	Graphite Filled	CF Reinforced
Dry Friction Coeff. (1MPa)	0.12-0.18	0.08-0.12	0.05-0.08
Wear Rate (×10⁻⁶ mm³/N·m)	1.0-1.5	0.6-1.0	0.3-0.6
PV Limit Value (MPa·m/s)	2.0	3.5	4.0

Machining Parameters Guide

Process	Parameter Range	Key Control Points
CNC Skiving	Speed 600-1000 rpm	Diamond Coated Tools
Drilling Feed	0.05-0.1 mm/rev	Coolant Assistance
Bonding	Plasma Treatment + Epoxy Adhesive	Complete within 24 hours
Thermoforming	200℃±5℃, 0.3-0.5 MPa	Special Anti-Deformation Mold

Certification Standards

Certification Type	Applicable Models	Inspection Focus
FDA Food Grade	GF / Graphite Filled	Migration Test
UL Flame Retardant	All Models (≥3mm)	Vertical Burning Test
ISO 10993 Medical Grade	CF Reinforced	Cytotoxicity
RoHS Environmental	Non-Lead Formulations	6 Hazardous Substances

Application Selection Reference

Application Scenario	Preferred Type	Alternative Solution	Key Requirement
Chemical Seals	GF Reinforced	CF Reinforced	Anti-Creep + Corrosion Resistance
Oil-Free Bearings	Graphite Filled	Bronze Powder Filled	Low Friction + High PV Value
Electronic Heat Dissipation	CF Reinforced	Graphite Filled	High Thermal Conductivity + Insulation
Explosion-Proof Equipment	Bronze Powder Filled	CF Reinforced	Conductive + Anti-Static

Special Treatment Options

Treatment Type	Technical Type	Applicable Models
Mirror Polishing	Ra ≤ 0.4 μm	All Models
Anti-Static Treatment	Surface Resistance 10⁶-10⁸ Ω	GF / CF Reinforced
Food Grade Certification	Pass FDA 21 CFR 177.1550	Special Formulation
Gamma Ray Sterilization	Withstands 50 kGy Dose	Medical Grade CF Reinforced

Typical Applications

· Chemical Equipment: High-pressure reactor seal gaskets (GF Reinforced)

· Mechanical Engineering: Oil-free bearing guides (Graphite Filled)

· Electronics & Electrical: Heat dissipation insulation plates (CF Reinforced)

· Special Industries: Explosion-proof equipment components (Bronze Powder Filled)

Machining Guide

1. Skiving/Machining:

   · Speed: 600-1000 rpm

   · Tools: Diamond or Carbide

2. Drilling:

   · Feed Rate: 0.05-0.1 mm/rev

   · Coolant assistance required

3. Bonding:

   · Plasma Treatment + Epoxy Adhesive

   · Shear Strength ≥ 8 MPa

Quality Certifications

· FDA 21 CFR 177.1550 (Food Grade)

· UL 94 V-0 Flame Retardant Certification

· ISO 10993-5 (Medical Grade)

· RoHS 2.0 Environmental Certification

Final Selection Suggestions

· Strong Corrosion Environments: Recommend GF Reinforced + Surface Polishing.

· High Wear Resistance Needs: Choose 20% Graphite Filled.

· High Heat Dissipation Requirements: Use CF Reinforced type.

· Anti-Static Applications: Bronze Powder Filled version.