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TPX® DX845

Sold by Mitsui Chemicals
TPX™ DX845TPX™ DX845 is a Polymethylpentene Copolymer (PMP Copolymer) material. It is available in North America for blow molding, fiber (spinning) extrusion, injection molding, pipe extrusion, or profile extrusion. Primary attribute of TPX™ DX845: High Stiffness.TPX™ DX845TPX™ is a 4-methylpentene-1-based olefin copolymer.TPX™ has a unique molecular structure. Although TPX™ is a crystalline olefin polymer, it shows transparency. Because of its excellent heat-resistance, release property and chemical resistance, TPX™ is used for industrial materials, including mandrels and sheaths in the manufacture of high-pressure rubber hose, mold cups to create LED light and other applications such as release film on FPC manufacturing process and release paper in the manufacture of synthetic leather.Furthermore, TPX™ possesses a lowest density among thermoplastic polymers and then provides the molded articles with lower weight. This leads to reduce the environmental load for transportation. It is also noted that TPX™ is a halogen-free polymer denoted as environmentally-friendly material.TPX™ is also used for food-related applications such as food wraps, food preservation packs, baking carton and microwave oven tableware.
Polymer Name: Polymethylpentene (PMP)
Processing Methods: Film Extrusion, Fibers Extrusion, Blow Molding, Profile Extrusion, Injection Molding, Pipe, Profile & Tubing Extrusion
Melt Flow Index: 9.0 g/10
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TPX® DX845 Features & Benefits

Materials Features

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Physical Form
Clear or transparent
Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Strength at Yield30MPaASTM D 638
Tensile Strength25MPaISO 7619-1
Elongation at Break12%ASTM D 638
Tensile Modulus1903MPaASTM D 638
Flexural Strength47MPaASTM D 790
Flexural Modulus1600MPaASTM D 790
Izod Impact notched (1/8 in)19.8J/mASTM D 256
Rockwell HardnessR87-ASTM D 785
Physical Properties
ValueUnitsTest Method / Conditions
Melt Flow Index - MFI (260°C/5 kg)9g/10 minASTM D 1238
Mold Shrinkage (TD)1.2mm/mmASTM D 955
Mold Shrinkage (MD)1.5mm/mmASTM D 955
Density833kg/m3ASTM D 792
Thermal Properties
ValueUnitsTest Method / Conditions
Coefficient of Thermal Expansion (MD)380E-6/KASTM D 696
Deflection Temperature Under Load (66 psi)127°CASTM D 648
Vicat Temperature174°CASTM D 1525
Electrical Properties
ValueUnitsTest Method / Conditions
Volume Resistivity1.0e+16ohm.mASTM D 257
Optical Properties
ValueUnitsTest Method / Conditions
Haze1.1%ASTM D 1003
Index of Refraction1.46-ASTM D 542
Light Transmittance94%ASTM D 1003

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