Chimei ACRYREX CM-205 PMMA is an optical-grade injection molding acrylic resin featuring exceptional optical transparency, high rigidity, and superior surface hardness.
| Manufacturer | Chimei |
|---|---|
| Density | 1.19 g/cm³ |
| MVR | 2.0 cm³/10 min |
| Tensile Strength at Break | 68 MPa |
| Flexural Modulus | 3200 MPa |
Note: See the product description for additional technical specifications
Chimei ACRYREX® CM-205 PMMA is a high-performance polymethyl methacrylate (PMMA, commonly known as acrylic) resin raw material produced by the renowned chemical enterprise Chimei Corporation. In terms of physical appearance, this product typically presents as uniform pellet raw materials, featuring exceptional crystal transparency and outstanding surface gloss.
As a benchmark grade for optical-grade and general injection/extrusion molding, CM-205 holds a pivotal position in the global transparent plastics market. It not only possesses excellent light transmittance and weather resistance, but also balances good rigidity and mechanical strength, making it widely applied in high-end consumer electronics, optical lenses, automotive lighting, lighting equipment, and various transparent display products.
| Property | Test Value | Test Unit | Test Standard |
| Density 23 °C | 1.19 | g/cm³ | ISO 1183 |
| Rockwell Hardness M | 95 | — | ASTM D785 |
| Melt Volume-Flow Rate (MVR) 230 °C, 3.8 kg | 2 | cm³/10 min | ISO 1133 |
| Property | Test Value | Test Unit | Test Standard |
| Tensile Strength, Break 50 mm/min | 68 | MPa | ISO 527 |
| Flexural Strength 2 mm/min | 110 | MPa | ISO 178 |
| Flexural Modulus 2 mm/min | 3200 | MPa | ISO 178 |
| Charpy Impact Strength, Notched 4 mm, 23 °C | 1.8 | kJ/m² | ISO 179 |
| Tensile Strain 50 mm/min | 10 | % | ISO 527 |
| Property | Test Value | Test Unit | Test Standard |
| Vicat Softening Temperature 50 °C/h | 115 | °C | ISO 306/B120 |
| Heat Distortion Temperature, Unannealed | 84 | °C | ISO 75-2 |
| Flammability Rating 1.5 mm | HB | — | UL 94 |
Notice: The technical data sheet (TDS) of Chimei ACRYREX® CM-205 PMMA material from Chimei corporation, if there are differences, please refer to the official website of Chimei.
Exceptional Optical Transparency: Features extremely high light transmittance and low haze, capable of presenting crystal-clear visual effects, making it ideal for optical and premium aesthetic parts.
Superior Surface Hardness and Wear Resistance: Rockwell Hardness M reaches 95, providing strong resistance to surface scratching and maintaining good gloss over long-term use.
Good Mechanical Rigidity: Tensile strength reaches 68 MPa and flexural modulus reaches 3200 MPa, offering outstanding structural rigidity and resistance to deformation.
Outstanding Processing Flowability: With an optimized melt flow rate (2.0 cm³/10 min), it provides an excellent processing flow window during injection and extrusion molding, suitable for efficient filling of complex molds.
Outstanding Weather and Aging Resistance: Exhibits robust resistance to ultraviolet rays and routine environmental aging, preventing yellowing during long-term indoor or outdoor use.
Consumer Electronics & Home Appliances: Commonly used to manufacture home appliance panels, electronic product display windows, instrument cluster bezels, and various transparent protective enclosures.
Automotive Industry: Widely applied in automotive tail light lenses, interior indicator light panels, instrument panel lenses, and decorative strips.
Lighting & Optical Equipment: Suitable for LED lighting lenses, light guide plates, optical lenses, and various indoor/outdoor illuminated sign letters.
Medical Devices & Daily Commodities: Can be used for medical observation windows, cosmetic display cases, and high-end daily packaging containers that require high transparency and sanitary standards.
Q1: Does Chimei ACRYREX® CM-205 PMMA require drying before processing?
A: Yes, thorough drying is required. Because PMMA has slight hygroscopicity, excessive moisture content prior to injection molding can easily cause silver streaks, bubbles, or surface haze on the finished product. It is recommended to use a circulating hot-air drying oven at 70–80°C for 2–4 hours, controlling the moisture content below 0.05%.
Q2: What are the core advantages of CM-205 PMMA compared to general PS or transparent ABS?
A: Compared to general PS (polystyrene), CM-205 PMMA offers higher surface hardness, better weather/UV resistance, and superior optical purity with less tendency to yellow. Compared to transparent ABS, PMMA features higher light transmittance, a more stable refractive index, and superior weatherability.
Q3: Does this material comply with environmental and relevant safety certification standards?
A: Chimei ACRYREX® CM-205 PMMA complies with major global environmental and regulatory requirements, typically meeting the RoHS directive and REACH regulations. Its flammability rating is UL 94 HB. If you require official compliance documentation (COA / MSDS) tailored for specific end-use applications (such as food contact or medical grades), please feel free to contact us.
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