PTFE (POLYTETRAFLUOROETHYLENE) RODS

PTFE or Teflon, polytetrafluoroethylene, is made of fluorine and carbon bonds which provide one of the strongest chemical linkages by displaying a compact symmetrical arrangement of atoms. The result of this bond and chain configuration is relatively dense, chemically inert and thermally stable polymer. PTFE has the ability to resist attacks of heat and most chemicals. PTFE rod exhibits the lowest electrical constant and lowest dissipation factors as compared to all the other solid materials. Also, because of strong chemical linkage, PTFE rod shows very little attraction for dissimilar molecules. The result of this phenomenon is low coefficient of friction of 0.05. Also, due to its chemical bonding the PTFE rods are virtually insoluble.

CHARACTERISTICS OF PTFE RODS
Some of the key characteristics of the PTFE rods are:
• Outstanding resistance towards chemicals
• Extremely low friction or coefficient of friction
• It is soft and formable
• It has excellent bearing and wearing properties.
• It has great weathering resistance
• It performs exceedingly well at elevated temperatures
• It is considered as non-toxic
• It has excellent dielectric properties
• It has high anti adhesiveness
• It has zero moisture absorption.
• Also, it has excellent radiation resistance.

PROPERTIES OF PTFE ROD

FEP GRADE
PROPERTY	UNIT	100	TE-9302N
MECHANICAL PROPERTY
Melt Flow Rate	g/10min	6.6	3
Specific Gravity		2.15	2.12-2.17
Water Absorption, 24hr	%	0.004	<0.01
Tensile Strength, 23 °C	Psi	4,000	4,354
Elongation, 23 °C	%	340	300
Compressive Strength, 23 °C at 5% strain	psi	2,200	2,200
Impact Strength, 23 °C, Notched Izod	J/m	No break	No break
Flexural Modulus, 23 °C	psi	90,000	95,000
Durometer Hardness, Shore D	D	56	55
Coefficient of Friction		0.25	0.25
Deformation Under Load, 23 °C, 1000 psi,	%	0.50	0.50
24 hr.
THERMAL PROPERTIES
Melting Point	°C
Deflection Temperature (66 psi)	°C
Oxygen Index	%
Max. Service Temperature	°C
Thermal Conductivity	W/m-K
Flammability
ELECTRICAL PROPERTY
Surface Resistivity	Ohm-sq	10¹⁵	10¹⁵
Volume Resistivity	Ohm-cm	10¹⁷	10¹⁸
Dielectric Strength (10 mil film)	V/mil	2,000	2,000
Dielectric Constant, 21 °C, 100 kHz		2.06	2.06
Dissipation Factor, 21 °C, 100kHz		0.0003	0.0002-0.001
Arc Resistance	sec	165	165

APPLICATIONS OF PTFE RODS

Some of the widely accepted applications of PTFE rods are:
• It is widely used in scientific equipment
• It is of great use in medical equipments
• It is used for pump spare parts
• It is used for valve fitting components
• It is used for the manufacture of coaxial cable connectors
• It is also used in the making of transformers and capacitors.
• Baffles are also made using PTFE.

AVIALABLE SIZES OF PTFE RODS

The most widely available sizes (in diameter) are 0.062" to 9.000". However, the custom sizes are designed and made on special request of the customers. OPERATING TEMPERATURES The PTFE rods maintain a high viscosity at 327 °C. However, PTFE can operate between -200 °C to +260 °C.