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Grade: MBZ230(A)
Formula: PMP TPX®
Form: Granule
Material: Polymethylpentene (PMP, TPX®)
Commodity: Polymers
Nominal Granule Size: 3mm
Color: White
MBZ230(A) PMP Granules from Mitsui Chemicals are a high-performance and opaque grade of poly(4-methyl-1-pentene) engineered for demanding industrial and processing applications. This grade offers outstanding heat resistance, excellent chemical stability, and superior releasability, making it ideal for high-precision molding and processing environments. It is widely used in industries such as electronics, automotive, and advanced materials manufacturing. Key applications include LED mold release, rubber hose mandrels, and release liners for synthetic leather and flexible printed circuits (FPC). MBZ230(A) is formulated to deliver consistent demolding performance, thermal stability, and clean surface finishes. Its robust characteristics support innovation in polymer processing, contributing critical value to scientific research, advanced manufacturing, and high-performance industrial applications. This material is trusted for its performance consistency, offering engineers and researchers a dependable solution in environments where thermal and chemical stability are critical. Its ability to withstand high processing temperatures and its compatibility with modern manufacturing techniques make it a standout choice across multiple sectors. TPX™ materials like this grade continue to drive progress in lightweight polymers, replacing heavier alternatives without compromising performance.
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Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good-Fair
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair-Poor
Greases and Oils Good-Fair
Halogenated Hydrocarbons Fair-Poor
Halogens Fair-Poor
Ketones Good-Fair
Electrical Properties
Element Value
Dielectric constant @1MHz 2.12
Dissipation factor @ 1kHz 0.0002
Volume resistivity( Ohmcm ) >10¹⁶
Physical Properties
Element Value
Flammability HB
Refractive index 1.463
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 17
Water absorption - over 24 hours( % ) 0.01
Density( gcm⁻³ ) 0.835
Mechanical Properties
Element Value
Hardness - Rockwell R85
Elongation at break( % ) 15
Tensile modulus( GPa ) 1.5
Izod impact strength( J m⁻¹ ) 49
Tensile strength( MPa ) 25.5
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 100
Heat-deflection temperature - 1.8MPa( C ) 40
Lower working temperature( C ) 20
Upper working temperature( C ) 75-115
Specific heat( J K⁻¹ kg⁻¹ ) 2000
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.17@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 117

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