PTFE Elastic Cord is a flexible sealing material made from expanded polytetrafluoroethylene (ePTFE) through special processing. It combines the chemical inertness of PTFE with rubber-like elasticity, making it an ideal solution for dynamic sealing and complex-shaped filling applications.

Core Characteristics

Property	Technical Parameters	Core Advantages
Elastic Recovery Rate	≥80% (after 50% stretch)	Adapts to repeated deformation
Temperature Resistance	-200°C ~ +260°C	No aging in extreme temperatures
Chemical Resistance	Resists all strong acids/alkalis (except molten alkali metals/fluorine)	Long-term sealing in chemical equipment
Tensile Strength	Longitudinal ≥15 MPa, Transverse ≥8 MPa	Strong resistance to mechanical damage
Density	0.8~1.2 g/cm³	Lightweight design

Product Categories

Type	Structural Features	Typical Applications
Pure PTFE Cord	100% ePTFE fiber braided	Sealing in ultra-clean environments
Impregnated Reinforced Type	Silicone oil/graphite impregnated	Dynamic sealing for rotating shafts
Composite Type	PTFE-coated silicone core	Sealing joints requiring high elasticity
Conductive Type	Carbon fiber blended (resistance 10³~10⁶ Ω)	Anti-static hazardous areas

Specifications

Parameter	Standard Range	Customizable Range
Diameter	Φ1~20 mm	Φ0.5~30 mm
Breaking Strength	50~500 N (depending on diameter)	-
Color	White/Black/Gray	Customizable per RAL color chart
Minimum Bending Radius	3× diameter	Can be reduced to 2× diameter for special structures

Application Scenarios

5.1 Typical Industrial Applications

· Valve Sealing: Replaces traditional packing, installation efficiency increased by 50%

· Pump Shaft Sealing: Corrosion resistance 10 times higher than rubber cords

· Flange Filling: Adapts to irregular sealing surfaces (compressible to 60% of original diameter)

5.2 Specialized Fields

Comparison with Traditional Sealing Cords

Comparison Item	PTFE Elastic Cord	Asbestos Cord	Rubber Cord	Graphite Cord
Temperature Resistance	-200℃~+260℃	500℃ but carcinogenic	-40℃~+120℃	-200℃~+600℃
Chemical Inertness	★★★★★	★★☆☆☆	★★☆☆☆	★★★☆☆
Installation Convenience	On-site cuttable, no pre-forming required	Requires special tools	Requires mold pressing	Brittle and difficult to install
Service Life	3~8 years	1~2 years (gradually phased out)	1~3 years	2~5 years

Innovative Technologies

1 Intelligent Monitoring Type

· Integrated conductive fiber network:

  · Real-time resistance monitoring (accuracy ±2%)

  · Fracture warning threshold: resistance change >15%

2 Self-Healing Type

· Microcapsule technology parameters:

  · Repair agent capacity: 0.2 μL/mm

  · Response time: <15 minutes (activated at T >80℃)

  · Repair efficiency: >95% self-healing for cracks <0.3 mm

Quality Certifications

Standard	Test Item	Technical Indicator
ISO 9001	Batch Consistency	CpK ≥1.33
API 622	Dynamic Sealing Performance	Leakage rate <0.05 ml/min·m
FDA 21	CFR Extractables Test	<0.1 mg/cm² migration