PTFE Copper Powder Composite Rods are functional engineering plastic rods made from a polytetrafluoroethylene matrix uniformly blended with copper powder (typically 40-60% content). Combining the chemical inertness of PTFE with the thermal/electrical conductivity of copper, they are ideal materials for bearings, sliders, and seals in special working conditions.

Core Characteristics

Characteristic	Technical Parameter	Performance Advantage
Copper Powder Content	40%-60% (Customizable)	Balances mechanical & functional properties
Thermal Conductivity	5-15 W/(m·K)	20-50 times higher than pure PTFE
Coefficient of Friction	0.08-0.12 (Dry)	Self-lubricating and wear-resistant
Volume Resistivity	10⁻³-10⁻¹ Ω·cm	Eliminates electrostatic accumulation
PV Limit	0.8-1.2 MPa·m/s	Suitable for medium-high speed sliding parts

Product Specifications

Parameter	Standard Range	Special Customization
Diameter	Φ5-150mm	Φ2-300mm
Length	300-1000mm	50-2000mm
Copper Powder Particle Size	50-150μm	Nano copper powder (Special process required)
Tolerance Grade	h8	h6 (Precision machined parts)

Copper Powder Type Selection

Copper Powder Type	Characteristics	Suitable Applications
Electrolytic Copper Powder	Dendritic structure, strong bonding	High thermal conductivity requirements
Atomized Copper Powder	Spherical particles, good fluidit	High-precision injection molding
Silver-Plated Copper Powder	Surface resistivity <10⁻⁴ Ω·cm	Electromagnetic shielding components
Copper Alloy Powder	Wear resistance increased by 30%	Heavy-duty bearings

Processing Guide

1. Machining Parameters

Process	Tool Material	Cutting Speed	Feed Rate
Turning	Diamond-coated inserts	0-120 m/min	0.1-0.3 mm/rev
Drilling	Carbide drill bits	20-40 m/min	0.05-0.15 mm/rev
Milling	PCD tools	60-100 m/min	0.2-0.5 mm/tooth

2. Surface Treatment

· Polishing: Can achieve Ra 0.2μm (Mirror grade)

· Electroless Plating: Surface modification like Ni/Au can be applied

· Activation Treatment: Sodium-naphthalene treatment to enhance bonding strength

Typical Applications

1. Industrial Sector

Application Scenario	Technical Solution	Benefit Improvement
Compressor Crosshead Slider	Φ50mm rod, 60% copper powder	Service life increased from 3 months → 2 years
Injection Molding Machine Guide Bush	50% copper powder + 5% MoS₂	Coefficient of friction reduced by 35%
Chemical Pump Bearing	Nano copper powder reinforced type	Corrosion resistance 5 times higher than bronze

2. Special Fields

· Semiconductor Equipment: Ultra-pure copper powder (Cu >99.99%) rods for wafer transfer guides

· Medical Equipment: Antibacterial copper powder (Cu⁺ ion release) PTFE rods for sliding parts in MRI equipment

Comparison with Traditional Materials

Comparison Item	PTFE Copper Rod	Bronze Rod	Nylon Copper Rod
Density	3.2-3.8 g/cm³	8.8 g/cm³	2.1 g/cm³
Corrosion Resistance	★★★★★	★★☆☆☆	★★★☆☆
Thermal Conductivity	5-15 W/(m·K)	50-120 W/(m·K)	0.5-1 W/(m·K)
Cost	★★★☆☆	★★☆☆☆	★★★★☆

Quick Selection Guide

Working Condition	Recommended Composition	Technical Basis
High Thermal Conductivity	60% Cu powder + 5% Graphite	Thermal conductivity >12 W/(m·K)
Conductive/Antistatic	50% Silver-plated copper powder	Surface resistivity <10⁻³ Ω
Food Grade Application	40% Electrolytic Cu powder (FDA certified)	Copper ion release <0.1 mg/kg
Ultra-high Load	55% Cu alloy powder + 10% Glass fiber	Compressive strength >100 MPa

Quality Certification

Standard	Test Item	Indicator  Requirement
ASTM B214	Copper Powder Purity	≥ 99.9%
ISO 3547	Wear Rate	< 0.01 mm³/(N·m)
FDA 21 CFR	Copper Migration	< 0.1 mg/kg