Product Introduction to Graphite-Filled PTFE Tubes
Product Overview
Graphite-filled PTFE tubes are high-performance tubing manufactured through special processing, incorporating graphite filler into a polytetrafluoroethylene (PTFE) matrix. This product perfectly combines the excellent chemical stability of PTFE with the outstanding self-lubricating properties of graphite, specifically designed for sealing and fluid transfer demands in harsh operating conditions.
Core Characteristics
1. Exceptional Chemical Stability
· Resistant to strong acids, strong alkalis, and organic solvents.
· Operating temperature range: -200°C to +260°C.
2. Excellent Self-Lubrication
· Friction coefficient as low as 0.10-0.15.
· Enables long-term, maintenance-free operation.
3. Enhanced Mechanical Properties
· Wear resistance improved by over 50% compared to pure PTFE.
· Compressive strength: 15-25 MPa.
4. Stable Thermal Performance
· Thermal conductivity: 0.35-0.45 W/(m·K).
· Short-term temperature resistance up to 300°C.
Typical Applications
· Chemical Industry: Piping for corrosive media transfer.
· Food & Pharmaceutical: Sanitary-grade piping compliant with FDA standards.
· Semiconductor: High-purity chemical delivery systems.
· Mechanical Seals: Wear-resistant bushings, bearing components.
Product Specifications
· Size Range:
· Inner Diameter (ID): 3 - 500 mm
· Outer Diameter (OD): 5 - 600 mm
· Wall Thickness: 1 - 50 mm
· Graphite Content: 15% - 25%
· Color: Black
Competitive Advantages
1. 70% lighter than metal pipes, facilitating easy installation.
2. Service life 3-5 times longer than standard plastic pipes.
3. No lubrication required, avoiding secondary contamination.
4. Conductive/anti-static models available upon request.
With its unique combination of properties, graphite-filled PTFE tubes demonstrate exceptional application value in chemical, food, electronic, and other fields. We offer various standard sizes and customization services to meet diverse application requirements.
Basic Characteristics
| Item |
Parameter |
Test Standard |
| Test Standard |
PTFE + Graphite Filler (15%-25%) |
ASTM D4894 |
| Density |
2.15-2.25 g/cm³ |
ISO 1183 |
| Color |
Black (Graphite-filled) |
Visual |
| Graphite Content |
Graphite Content |
Thermogravimetric Analysis (TGA) |
Mechanical Properties
| Performance Indicator |
Value Range |
Unit |
Test Standard |
| Tensile Strength |
20-30 |
MPa |
ASTM D638 |
| Elongation at Break |
200-350 |
% |
ASTM D638 |
| Compressive Strength |
15-25 |
MPa |
ISO 604 |
| Hardness (Shore D) |
55-65 |
- |
ASTM D2240 |
Thermal Properties
| Performance Indicator |
Parameter Range |
Unit |
Remarks |
| Continuous Use Temperature |
-200°C ~ +260°C |
°C |
Long-term stable |
| Short-term Temperature Resistance |
Max. 300°C (within 1h) |
°C |
Avoid oxidation |
| Thermal Conductivity |
0.35-0.45 |
W/(m·K) |
30% higher than pure PTFE |
Friction and Wear Performance
| Test Item |
Value |
Test Conditions |
| Dry Friction Coefficient |
0.10-0.15 |
Steel vs. PTFE, 1 m/s, unlubricated |
| PV Limit Value |
0.5-0.8 |
MPa·m/s (water-lubricated) |
| Wear Rate |
< 1×10⁻⁵ |
mm³/Nm (Load 10N, 1 m/s) |
Chemical Resistance
| Medium |
Resistance Level |
Remarks |
| Strong Acids (Conc. H₂SO₄) |
★★★★★ |
Fully resistant |
| Strong Alkalis (50% NaOH) |
★★★★★ |
Fully resistant |
| Organic Solvents |
★★★★★ |
Resistant to alcohols, ketones, hydrocarbons |
| Oxidizing Agents |
★★☆☆☆ |
Avoid conc. nitric acid, hydrogen peroxide |
Product Specifications
| Parameter |
Standard Specification |
Standard Specification |
| Inner Diameter (ID) |
6-100 mm |
3-500 mm |
| Outer Diameter (OD) |
10-120 mm |
5-600 mm |
| Wall Thickness |
2-10 mm |
1-50 mm |
| 1-50 mm |
1000 mm (Standard) |
Custom length ≤ 5000 mm |
Typical Applications
| Application Area |
Recommended Specification |
Core Advantage |
| Chemical Seals |
ID 20-50 mm |
Corrosion-resistant, self-lubricating |
| Food Machinery |
FDA-certified models |
Non-toxic, meets sanitary standards |
| Semiconductor Equipment |
High-purity grade (<0.1 ppm) |
Low outgassing, contamination prevention |
| Hydraulic Systems |
Thick-walled tubes (≥5 mm) |
Anti-creep, high-pressure resistant |
