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The evolution of Polytetrafluoroethylene (PTFE) - more commonly known as
Teflon? - from a niche product used only in high-value applications to a
mainstream requirement has been very gradual. However, over the past two decades
PTFE usage seems to have crossed a critical mass, allowing it to become
commercially viable in over 200 industrial, consumer and medical applications.
And while Liantuo PTFE
Rod , rods, coatings and components corner the bulk of the market for
PTFE products, PTFE tubing is now emerging as the key growth area.
The use of PTFE tubing has spread across various applications including
automotive, chemical, electrical and medical. Table 1 shows the key properties
which outline the versatility of PTFE tubing, while Fig 1 shows its uses in
In automotive applications, the ability of PTFE to withstand temperatures in
excess of 250oC makes it an ideal candidate for high temperature fluid
In medical applications, PTFE tubing is in huge demand due to its lubricity
and chemical inertness. Catheters employing PTFE tubing can be inserted into the
human body without fear of reaction or abrasion with any body parts.
In chemical applications - including laboratories - PTFE is an ideal
replacement for glass due to its inertness and durability.
In electrical applications, the excellent dielectric properties of virgin
PTFE make it well suited for insulating high voltage cables.
Table 1: Key properties and applications of PTFE tubing
Depending on the application, PTFE tubing is divided into three broad
categories - each defined by the tube's diameter and the wall thickness (see
Even within categories, PTFE tubing lends itself to different variations,
each allowing for a different application (see Table 3):
In general, small diameter spaghetti tubing is used in medical applications.
The use of PTFE in this area centres on two key properties: lubricity and
biocompatibility. Fluoropolymers exhibit very good lubricity compared with other
plastics. PTFE is the most lubricious polymer available, with a coefficient of
friction of 0.1, followed by fluorinated ethylene propylene (FEP), with 0.2.
These two polymers represent the vast majority of all fluoropolymer tubing used
in medical devices.
The biocompatibility of any polymer used in a medical device is an obvious
concern. PTFE excels in this area and has a long history of in vivo use.
Medical-grade fluoropolymers should meet USP Class VI and ISO 10993 testing
requirements. Of course, processing cleanliness is also an important factor.
China PTFE Sheet: http://www.liantuoptfe.com/