Mitsui TPX?TPX DX820 Methylpentene Copolymer
Subcategory: Polymer; Polymethylpentene; Thermoplastic
Material Notes:
TPX? is a 4-methylpentene-1 based polyolefin with a unique combination of transparency, heat and chemical resistant qualities. TPX is used in a wide variety of applications, including: medical equipment, laboratory ware, small appliances, ovenware, baking cartons, release paper, wire and cable coating, and a number of industrial uses. TPX is manufactured and marketed solely by Mitsui Chemicals, Inc.
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| Physical Properties | Metric | English | Comments | |
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| Density | 0.833 g/cc | 0.0301 lb/in? | ASTM D1505 | |
| Water Absorption | 0.01 % | 0.01 % | 24 hours; ASTM D570 | |
| Melt Flow | 180 g/10 min | 180 g/10 min | 260?C, 5 kg; ASTM D1238 | |
Mechanical Properties |
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| Hardness, Rockwell R | 80 | 80 | ASTM D785 | |
| Tensile Strength at Break | 17.2 MPa | 2490 psi | At 23?C, 5mm/min; ASTM D638 | |
| Tensile Strength, Yield | 22.6 MPa | 3280 psi | At 23?C, 5mm/min; ASTM D638 | |
| Elongation at Break | 20 % | 20 % | MPC method, at 23?C, 5mm/min | |
| Modulus of Elasticity | 1.28 GPa | 186 ksi | Tangent; ASTM D790 | |
| Flexural Stiffness | 0.896 GPa | 130 ksi | Olsen Stiffness At 23?C; ASTM D747 | |
| Flexural Strength | 35.3 MPa | 5120 psi | At 23?C, 2mm/min; ASTM D790 | |
Electrical Properties |
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| Volume Resistivity | Min 1e+016 ohm-cm | Min 1e+016 ohm-cm | ASTM D257 | |
| Dielectric Constant | 2.12 | 2.12 | At 100 Hz - 1 MHz; ASTM D150 | |
| Dielectric Strength | 65 kV/mm | 1650 kV/in | ASTM D149 | |
Thermal Properties |
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| CTE, linear 20?C | 117 ?m/m-?C | 65 ?in/in-?F | ASTM D696 | |
| Specific Heat Capacity | 1.97 J/g-?C | 0.471 BTU/lb-?F | ASTM C351 | |
| Thermal Conductivity | 0.167 W/m-K | 1.16 BTU-in/hr-ft?-?F | BS 874A | |
| Melting Point | 240 ?C | 464 ?F | MPC Method | |
| Vicat Softening Point | 173 ?C | 343 ?F | ASTM D1525 | |
Optical Properties |
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| Transmission, Visible | 80 % | 80 % | Mfr. indicates clear but does not quantify | |
Descriptive Properties |
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| Appearance | Colorless transparent | |||
| Rate of Burning | 2.54 cm/min | ASTM D635 | ||
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Applications:
- Injection Molded Items:
- Blood test cells
- Medical instruments
- Laboratory ware
- Coffee maker parts
- Cosmetic containers
- Extrusion Molded Items:
- Sight glass (pipes, sheets)
- Baking cartons (food containers)
- Release paper
- Wire and cable coating
- Films
Molding Method:
- Paper coating
Information provided by Mitsui.
