描述
PLEXIMID TT70 Highest Heat Optical Grade PMMI
Material: PMMI
Vicat: 170°C
HDT (0.45 MPa): 158°C
Refractive Index: 1.54
Packing: 25kg bag
PLEXIMID TT70 is a highly heat distortion-resistant poly(n-methyl methacrylamide) (PMMI) molding compound offering the highest thermal performance in the PLEXIMID series. With a Vicat softening temperature of 170°C (B/50) and heat deflection temperature of 158°C at 0.45 MPa, this material delivers exceptional stability for extreme high-temperature optical applications. It offers high rigidity with a tensile modulus of 4000 MPa, excellent optical clarity with 91% light transmission, and the highest refractive index of 1.54. AMECA listed, PLEXIMID TT70 is approved for automotive optical applications requiring maximum thermal stability and regulatory compliance.
PLEXIMID TT70 combines high stability of optical characteristics under long-lasting thermal load with very high mechanical strength and rigidity. It is processable on injection molding machines with PMMA-suited 3-zone general purpose screws at melt temperature 260-290°C and mold temperature approximately 130°C. Typical applications include automotive lighting, light guides, lenses, fiber optics, luminaire covers, sight glasses, and cover lenses where maximum heat resistance and optical precision are essential.
Genuine Röhm PLEXIMID Imported Stock and Technical Support
We supply stable spot inventory of genuine PLEXIMID TT70 highest heat PMMI. Official TDS, batch COA, and AMECA documentation are available for automotive lighting, optics, and extreme high-temperature injection molding applications.
Request PLEXIMID TT70 Quotation, TDS, and Sample
Complete TDS, COA, and technical documentation available
Core Advantages of PLEXIMID TT70
- Highest heat resistance: Vicat 170°C — maximum thermal stability in the PLEXIMID series
- Highest HDT: 158°C (0.45 MPa) — superior dimensional stability under extreme thermal loads
- High rigidity: 4000 MPa — excellent mechanical strength and stiffness
- Highest refractive index: 1.54 — superior optical performance for precision optics
- High light transmission: 91% — excellent optical clarity
- AMECA listed — certified for automotive optical applications
- Stable optical characteristics — maintains clarity under long-term thermal exposure
- Good weather resistance — UV stable for outdoor and long-term use
Main Applications
- Automotive lighting — headlamp lenses, reflex reflectors, high-temperature lighting components
- Light guides — precision light transmission components
- Optical lenses — precision optics for extreme high-temperature environments
- Fiber optics — optical fiber components
- Luminaire covers — lighting fixtures exposed to maximum temperatures
- Sight glasses and cover lenses — protective optical components
Full Technical Parameters
| Property | Typical Value | Test Method |
| Material Type | PMMI | — |
| Density | 1.21 g/cm³ | ISO 1183 |
| Tensile Modulus (1mm/min) | 4000 MPa | ISO 527 |
| Stress at Break (5mm/min) | 80 MPa | ISO 527 |
| Strain at Break (5mm/min) | 3% | ISO 527 |
| Charpy Impact Strength (23°C) | 20 kJ/m² | ISO 179/1eU |
| Vicat Softening Temperature (B/50) | 170°C | ISO 306 |
| HDT (0.45 MPa) | 158°C | ISO 75 |
| HDT (1.8 MPa) | 149°C | ISO 75 |
| MVR (260°C/10kg) | 1.7 cm³/10min | ISO 1133 |
| Luminous Transmittance (d=3mm) | 91% | ISO 13468-2 |
| Refractive Index (589nm/23°C) | 1.54 | ISO 489 |
| Water Absorption (saturation, 23°C) | 6% | ISO 62 |
| Fire Class | E | DIN EN 13501-1 |
| AMECA Listing | Yes | — |
Note: All listed figures are typical values and may vary by production batch. Complete independent qualification testing is required before mass production deployment.
Recommended Processing Conditions
| Parameter | Recommended Value |
| Processing Method | Injection Molding |
| Predrying Temperature | ≤120°C |
| Predrying Time (Desiccant Dryer) | 2-3 hours |
| Melt Temperature | 260-290°C |
| Mold Temperature (Injection Molding) | ~130°C |
| Screw Type | PMMA-suited 3-zone general purpose screw for thermoplastics |
Handling and Storage Recommendations
| Storage Rules | Store in dry, cool conditions away from direct sunlight and heat sources. After partial removal, reseal container to prevent moisture permeation. |
| Packaging | 25kg aluminum-laminated polyethylene bags. |
| Predrying | Dry at ≤120°C for 2-3 hours before processing. Moisture control is critical for optical quality. |
| Operation Protection | Follow standard safety practices for handling thermoplastic pellets. Use appropriate PPE during processing. |
Official Technical Documentation
| Document Type | Document Introduction | Document Request |
| TDS | PLEXIMID TT70 original factory technical data sheet | Request TDS |
| COA | Batch-specific certificate of analysis | Request COA |
Frequently Asked Questions
What is PLEXIMID TT70?
PLEXIMID TT70 is a highest heat PMMI molding compound with Vicat softening temperature of 170°C, HDT of 158°C, tensile modulus of 4000 MPa, and refractive index of 1.54, AMECA listed for automotive optical applications requiring maximum thermal stability.
What is the heat resistance of PLEXIMID TT70?
PLEXIMID TT70 offers Vicat softening temperature of 170°C (B/50) and heat deflection temperature of 158°C at 0.45 MPa — the highest in the PLEXIMID series for extreme high-temperature environments.
What is the difference between PLEXIMID TT50 and TT70?
TT70 offers higher heat resistance (Vicat 170°C vs 150°C, HDT 158°C vs 146°C), higher refractive index (1.54 vs 1.53), lower MVR (1.7 vs 5 cm³/10min), higher processing temperatures, and higher water absorption (6% vs —), delivering maximum thermal performance.
What applications is PLEXIMID TT70 suitable for?
PLEXIMID TT70 is ideal for automotive lighting, light guides, lenses, fiber optics, luminaire covers, sight glasses, and cover lenses requiring maximum heat resistance and optical clarity.
Is PLEXIMID TT70 AMECA listed?
Yes. PLEXIMID TT70 is AMECA listed, making it suitable for automotive lighting and optical applications requiring regulatory compliance.
What are the processing conditions for PLEXIMID TT70?
Recommended conditions: predrying at ≤120°C for 2-3 hours, melt temperature 260-290°C, mold temperature approximately 130°C. Use injection molding machines with PMMA-suited 3-zone general purpose screws.
What is the refractive index of PLEXIMID TT70?
PLEXIMID TT70 has a refractive index of 1.54 (589nm/23°C), the highest in the PLEXIMID series, making it ideal for advanced optical applications.
Related PLEXIMID & PLEXIGLAS Products
Compare PLEXIMID and PLEXIGLAS molding compounds for different temperature and optical requirements.
| Product | Material | Vicat B/50 | HDT (0.45 MPa) | Refractive Index | AMECA |
| PLEXIMID TT70 | PMMI | 170°C | 158°C | 1.54 | ✅ |
| PLEXIMID TT50 | PMMI | 150°C | 146°C | 1.53 | ✅ |
| PLEXIGLAS 8N | PMMA | 108°C | 103°C | 1.49 | ✅ |
Get PLEXIMID TT70 Bulk Pricing and Technical Support
We supply genuine PLEXIMID TT70 highest heat PMMI for automotive lighting, optics, and extreme high-temperature injection molding applications. Contact us for bulk pricing, sample availability, technical documents, and application support.
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Disclaimer: All technical data on this page are for general guidance only and are not product specifications. Buyers must carry out independent trials and verify suitability before bulk ordering. Actual values may vary between production lots.
