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Home » TPX™ Polymethylpentene (PMP) Characteristics
TPX™ Polymethylpentene (PMP) Characteristics

Heat Resistance
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 analysis cells.


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.



Gas Permeability
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.



Low Density
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™.


Steam Resistance
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.


Chemical Resistance
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.



Low-dielectric Properties
Because of its outstanding dielectrical properties - ε = 2.1 and tan δ = 0.0008 (at 12 GHz) - TPX™ fits very well in the field of high-frequency applications.

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.


Related Products

APEL™ Cyclo Olefin Copolymer (COC)

High refractive index, low birefringence, optical grade amorphous polyolefin.

TPX™ Film Opulent™

A heat resistant release film, available in single layer and in multi layer, the polymethylpentene film offers high moisture vapor transmission rate (MVTR).

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