Having a high melting point (depending on the selected grade within a range of
220°C to 240°C) TPX® can be used at high temperatures. At the same
time it serves with a rather high Vicat softening point. However, in case of applications
where load is applied to TPX®, special attention has to be paid to its heat
distortion temperature, which is almost the same as that of polypropylene.
Peelability / Non-compatibility
Since TPX® has a very low surface tension of only 24mN/m, what is even lower
than that of some fluorocarbons, TPX® shows an excellent peelability from
a big variety of materials. Because of this characteristic, TPX® is used where
an excellent separating property is required; for example as a release material
at the time of curing thermosetting resins (such as urethane and epoxy). Furthermore,
since TPX® does not mix with other thermoplastic resins (such as PET and PP),
it is used for the purpose of making PET and PP films micro-porous.
Separating Force from Epoxy
Although TPX® is a crystalline resin, it is transparent like glass and has
an excellent transmission rate for visible light (> 93%; haze < 5%). On
top of this it shows a better transmission in the UV-range compared with glass
or other transparent resins. That is why TPX® is, for example, used for spectroscopic
Low Refractive Index
The refractive index of TPX® is only 1.463 n20D, which is lower than that
of fluorocarbon or other transparent resins. So in the case where low-refraction
material is required, TPX® is one of the best choices.
TPX® has a very high gas permeability (10 times higher than that of PE), which
makes it an excellent material for gas separating applications like permeable
films, membranes and hollow fibres.
TPX® provides the lowest density (830kg/m3) among all thermoplastic resins;
i.e. it offers the largest specific volume, which makes it possible to reduce
molded-part weight by substituting other resins with TPX®.
The water absorption of TPX® is very low and therefore dimensional change
caused by hydrolysis cannot be observed. Even in boiling water, TPX® does
not hydrolyze. Therefore TPX® is the predestined material for such applications
which require steam sterilization.
Like polyolefins, TPX® shows an excellent chemical resistance which is better
than that of polycarbonate or acrylics. That is why TPX®, for example, is
so often used in the cosmetic field for caps and tubes.
Because of its outstanding dielectrical properties - ε = 2.1 and tan
= 0.0008 (at 12 GHz) - TPX® fits very well in the field of high-frequency
Food Sanitation Properties
TPX® is available in a wide range of grades to meet requirements and regulations
of various domestic markets, US FDA-standards and EU-food-standards.
As for the EC Directive, it is necessary to check the conformity of the application
at the level of the end product. TPX® contains chemical substances whose Specific
Migration Limit (SML) is 0.05 mg/kg and 5 mg. For the details of the conformity of TPX® with the
FDA regulations, please contact our responsible department.