聚 四 氟 乙 烯 棒 材

Ⅰ、特征

    直径1mm--4mm的棒选用分散聚合聚四氟乙烯树脂经糊膏挤压加工制成；直径5-160mm的棒选用悬浮聚四氟乙烯树脂经柱塞加工制成；直径160mm以上的棒经模压加工制成;填充棒材，可以填充10%，15%。25%不同配方的玻纤，石墨，碳粉等。

Ⅱ、型号及规格

Ⅲ、主要技术指标

注：当棒直径大于16mm时，仅测试表观密度。

Ⅳ、用途  

    电绝缘零件，密封件垫，防粘材料

PTFE Extruded Rod Product Introduction

PTFE extruded rod is a high-performance plastic rod made from pure polytetrafluoroethylene (PTFE) as the raw material, formed through a ram extrusion process. As a premium category within PTFE products, it leverages a unique continuous extrusion manufacturing process that retains PTFE's excellent chemical stability while offering superior mechanical properties and dimensional accuracy, making it an ideal choice for demanding industrial environments.

Core Product Advantages

· Denser Structure: Porosity below 0.5%, providing 3 times better airtightness compared to molded products.

· Outstanding Mechanical Properties: Tensile strength reaches 35 MPa, elongation at break exceeds 500%.

· Ultra-Long Continuous Forming: Supports unlimited length coil supply (maximum diameter 300mm).

· Zero Surface Defects: Inner wall smoothness Ra < 0.4 μm, meeting medical-grade requirements.

· Higher Cost-Effectiveness: Material utilization increased by 30%, production costs reduced by 25%.

Key Performance Parameters

· Temperature Range: -200℃ ~ +260℃ (short-term 300℃)

· Dielectric Strength: 45 kV/mm (1mm thickness)

· Friction Coefficient: 0.05-0.08 (water-lubricated conditions)

· Coefficient of Linear Expansion: 9.5×10⁻⁵/℃ (20-100℃)

Typical Application Fields

· Chemical Corrosion Protection: Reactor linings, pipeline compensators.

· Cable Manufacturing: Insulation layer for high-frequency communication cables.

· Medical Devices: Minimally invasive surgical catheters, artificial blood vessels.

· Semiconductor: Ultra-pure chemical delivery pipelines.

· Food Industry: Lining for dairy processing pipelines.

Special Customization Capabilities

· Flexible Sizes: Adjustable diameter from 0.5-300mm, minimum wall thickness 0.3mm.

· Functional Modification: Special types available (conductive/anti-static/reinforced).

· Color Variety: Standard white, optional black, gray, blue, etc., for identification.

· Comprehensive Certifications: Passed FDA, NSF, RoHS, and other international certifications.

Technical Service Support

· Provision of ANSYS mechanical simulation reports.

· Free sample cutting service (≤ 1 meter).

· On-site installation guidance (e.g., flange sealing solutions).

· Failure analysis and improvement suggestions.

This product has been successfully applied in:

· 98% sulfuric acid transfer system in a chemical group (5 years of continuous use without corrosion).

· High-frequency coaxial cables for 5G base stations (dielectric loss < 0.0003).

· DSA interventional therapy catheters in a tertiary hospital (passed ISO 10993 testing).

Note: Medical-grade products require raw materials from dedicated clean production lines. Conventional industrial grade is not recommended for direct human contact scenarios. Accelerated aging tests are recommended for validation under extreme conditions.

Basic Characteristics

Item	Parameter	Test Standard
Material Composition	Pure Polytetrafluoroethylene (PTFE)	-
Production Process	Ram Extrusion Molding	ASTM D4894
Color	White (Black/Gray, etc. customizable)	Visual
Density	2.14-2.20 g/cm³	ASTM D792
Continuous Service Temperature	-200℃ ~ +260℃	ASTM D794

Core Performance Data

Performance  Indicator	Value Range	Difference vs. Molded Rod
Tensile Strength	25-35 MPa	10-15% Higher
Elongation at Break	300-500%	50-100% Higher
Dielectric Strength	40-50 kV/mm	Similar
Friction Coefficient (Dynamic)	0.05-0.10	20% Lower
Linear Shrinkage (after sintering)	3-5%	More Stable

Extrusion Process Advantages

1. Structural Density

· Porosity < 0.5% (Typically 1-2% for molded rods)

· Permeation resistance improved by 3 times (ASTM F37 airtightness test)

2. Dimensional Capabilities

Parameter	Extrusion Process	Molding Process
Maximum Diameter	300mm	150mm
Length Continuity	Unlimited Length (Coiled)	≤ 1200mm
Wall Thickness Uniformity	± 0.05mm	± 0.1mm

3. Economic Comparison

· Material utilization rate increased by 20-30%

· Production speed reaches 2-5 m/min (Molding method: 0.5 m/min)

Product Specification Table

Specification Parameter	Standard Range	Special Customization
Diameter	5-250mm	0.5-300mm
Wall Thickness (Tubing)	1-50mm	0.3-100mm
Length	Coiled (Max 500m)	Fixed-length cutting
Tolerance	± 0.1% (Diameter)	± 0.05% (Precision Grade)

Key Application Fields

Application Scenario	Advantage Demonstrated	Typical Product
Chemical Pipeline Lining	Weld-free, Anti-permeation	Flange liner, Compensator
Cable Sheath	Ultra-long Continuous Extrusion	High-frequency cable insulation layer
Medical Catheters	Inner Wall Smoothness Ra < 0.4 μm	Minimally invasive surgical instrument sleeve
Semiconductor Transport	Ultra-pure, Non-leaching	Acid delivery tube

Certification System

Certification Type	Applicable Standard	Inspection Focus
Food Grade	FDA 21 CFR 177.1550	Total Migration < 10 mg/dm²
Electronic Grade	SEMI F57	Metal Ion Content < 1 ppb
Industrial Anti-corrosion	NACE MR0175/ISO 15156	H₂S Stress Corrosion Test
EU Environmental	RoHS/REACH	PFOA < 25 ppb

Selection Considerations

· Scenarios for Cautious Use:

  · ❌ Long-term exposure to temperatures > 260°C

  · ❌ Contact with molten alkali metals

· Recommended Scenarios:

  · ✅ Transporting highly corrosive media

  · ✅ Applications requiring high cleanliness levels