Double Elephant PMMA SX-301: High Flow Virgin PMMA Resin Optimized for Injection Molding Thin-Wall & Complex Transparent Plastic Components
Polymethyl methacrylate (PMMA), widely known as acrylic or acrylic glass, remains one of the most popular amorphous transparent thermoplastics across global manufacturing industries. As demand grows for lightweight, high-clarity, cost-effective alternatives to mineral glass, high-flow injection molding PMMA grades have become essential raw materials for manufacturers producing intricate transparent consumer goods. Among mainstream domestic PMMA offerings, Double Elephant PMMA SX-301, manufactured by Suzhou Double Elephant Optical Materials Co., Ltd., stands out as a reliable virgin PMMA grade tailored specifically for thin-wall, long flow path and complex-shaped transparent injection molded products.
Basic Material Composition & Molecular Characteristics of PMMA SX-301
Double Elephant PMMA SX-301 is 100% virgin homopolymer polymethyl methacrylate synthesized via controlled free-radical polymerization of methyl methacrylate (MMA) monomers. The repeating chemical unit of PMMA is (C₅H₈O₂)ₙ. The molecular chain carries methyl ester side groups, which create steric hindrance and prevent regular crystal arrangement. This amorphous molecular structure is the core reason for its outstanding optical transparency, enabling visible light transmittance up to 93%.
No glass fiber, mineral filler or recycled material is added in SX-301 formulation. The polymerization process is strictly controlled to achieve balanced molecular weight distribution, targeting a melt flow rate of 14 g/10min under test condition 230℃ / 3.8kg. Compared with standard general-purpose PMMA grades, the optimized molecular weight delivers significantly improved melt fluidity without obvious sacrifice of surface hardness, gloss and optical performance. Low residual monomer and low volatile content reduce surface defects like silver streaks, bubbles and foggy marks during mass injection molding.
As a pure homopolymer PMMA, SX-301 features balanced rigidity, moderate tensile strength and reliable dimensional stability. Equilibrium water absorption stays at only 0.3%, which means molded parts maintain stable dimensions under normal indoor humidity conditions, lowering the risk of deformation after production. The material is naturally water-clear transparent without inherent color, and it can be easily toned with transparent masterbatch, translucent colorants, pearl pigments and metallic color concentrates to achieve diverse aesthetic effects.
Core Technical Properties of Double Elephant PMMA SX-301
All test data follows international ISO and ASTM standards for thermoplastic materials. The complete technical data sheet is listed below for engineers, mold designers and procurement teams to conduct material verification and mold design calculation.
| Property | Test Standard | Typical Value | Unit |
|---|---|---|---|
| Density | ISO 1183 | 1.19 | g/cm³ |
| Light Transmittance | ASTM D1003 | 93 | % |
| Equilibrium Water Absorption (23°C) | ISO 62 | 0.3 | % |
| MFR (230℃ / 3.8 kg) | ISO 1133 | 14 | g/10min |
| Tensile Strength | ISO 527 | 68 | MPa |
| Elongation at Break | ISO 527 | 4 | % |
| Notched Izod Impact Strength | ISO 179 | 1.2 | kJ/m² |
| Rockwell Hardness | ASTM D785 | M90 | - |
| Heat Deflection Temperature (1.8 MPa) | ISO 75-2/A | 84 | ℃ |
| Vicat Softening Temperature | ISO 306 | 89 | ℃ |
From the property data, the high melt flow rate is the most competitive advantage of SX-301. It can smoothly fill thin-walled cavities ranging from 0.3 mm to 1.5 mm and long flow path molds, which many low-flow standard PMMA grades cannot achieve under stable injection pressure. The high surface hardness effectively reduces surface scratches during assembly, packaging and daily use. The high light transmittance ensures crystal-clear appearance without internal haze, satisfying high aesthetic requirements for transparent consumer products.
Key Advantages of Double Elephant PMMA SX-301
- Superior melt fluidity for complex thin-wall injection molding, suitable for multi-cavity molds and long flow path products; shorten molding cycle and improve production efficiency.
- 93% high light transmittance, low haze, excellent optical clarity, comparable to many imported general-purpose acrylic grades.
- High surface gloss, good color rendering performance, supporting various transparent and special color effects.
- Stable batch consistency, low impurity particle rate, reduce reject rate in mass production.
- Good indoor weather resistance, slow yellowing rate under indoor UV light, suitable for long-term indoor display products.
- RoHS and REACH compliant, environmentally friendly formulation, meets export requirements for EU, Southeast Asia and global consumer markets.
- Clean demolding performance, less adhesion to mold surface, reducing mold maintenance frequency.
It is necessary to remind manufacturers that SX-301 is injection molding dedicated grade. It is not recommended for extrusion thick acrylic sheet, high-temperature automotive exterior lighting or long-term continuous outdoor exposure scenarios. For extrusion or high heat-resistant applications, customers can select other grades from Double Elephant PMMA series such as SX-304.
Recommended Processing Parameters for Injection Molding
PMMA is sensitive to moisture. Moisture inside pellets will cause silver streaks, bubbles and surface ripples on finished transparent parts, so sufficient drying is mandatory before production.
- Drying temperature: 80℃ ~ 90℃
- Drying time: 2 ~ 4 hours
- Barrel temperature range: 180℃ ~ 220℃
- Mold temperature: 60℃ ~ 80℃
- Screw speed: Medium-low speed to avoid excessive shear leading to material degradation
- Back pressure: Moderate setting to guarantee homogeneous melt
Slow injection speed is suggested for transparent surface requirements to minimize flow marks and weld lines. Mold surface polishing directly determines the final gloss of PMMA products. High mirror polishing is recommended for aesthetic transparent components.
Comprehensive Industrial Applications of PMMA SX-301
Thanks to the combination of high flowability, high transparency and outstanding surface appearance, Double Elephant PMMA SX-301 has gained wide recognition across multiple downstream industries. The main application fields are sorted as below:
1. Cosmetic Transparent Packaging
This is the largest application market for SX-301. It is widely used for transparent essence bottles, cream jar outer shells, cosmetic caps, powder box shells, perfume decorative covers and cosmetic display accessories. Many cosmetic brands prefer this grade because of its high transparency, beautiful gloss and capability to mold complex curved and faceted container shapes.
2. Transparent Decorative Crafts & Gift Accessories
Desktop ornaments, transparent display stands, acrylic figurine shells, spectacle frames, gift transparent packaging shells, crystal-style decorative parts. The high fluidity allows designers to realize complicated thin-wall craft shapes that cannot be produced with ordinary low-flow PMMA.
3. Household Transparent Consumer Goods
Transparent storage boxes, food display containers, transparent kitchen utensils, transparent toiletries housings, transparent lids for household appliances. The lightweight characteristic makes acrylic products safer than glass for daily household use.
4. LED Indoor Lighting Components
Small decorative lamp covers, transparent light diffusing decorative panels, indoor atmosphere light thin light guide sheets, small LED lamp transparent outer shells. It delivers stable light transmission and uniform light effect for indoor lighting equipment.
5. Consumer Electronics & Small Home Appliance Decorative Parts
Transparent decorative strips for air purifiers, humidifier observation windows, small fan transparent covers, audio decorative transparent panels, instrument indicator light lenses. These components do not require ultra-high heat resistance, matching the temperature performance of SX-301 perfectly.
6. Stationery & Office Supplies
Transparent pen barrels, transparent ruler shells, file display transparent accessories, desktop transparent storage accessories.
Global consumer goods manufacturing continues to recover. More plastic processors are seeking cost-stable domestic virgin PMMA to replace expensive imported acrylic materials. Double Elephant PMMA SX-301 provides a balanced solution between processing performance, surface quality and raw material cost for injection molding factories.
Packing, Supply & Supporting Documents
Jiangsu Zijun International Trade Co., Ltd.
Jiangsu Zijun International Trade Co., Ltd, located in Kunshan, Suzhou, Jiangsu Province, China. Founded in 2009, the company has been deeply engaged in the plastic raw material industry for over 20 years. It is a professional foreign trade enterprise integrating product customization, technical support and global trade.
We mainly deal in general and engineering plastic raw materials including ABS, AS(SAN), PP, HDPE, LDPE, PC, EVA, POE and other related grades. Our products are widely applied in fields such as sheet extrusion, injection molding, blow molding and modified compounding pelletizing.
We maintain ample stock and stable delivery cycles with long-term supply from well-known petrochemical manufacturers such as SABIC, Formosa Chemicals, Kumho and Shanghai SECCO.
Adhering to the principle of Quality First, we rely on a mature supply chain and rich export experience. Our business network covers more than 30 countries across Southeast Asia, the Middle East, Europe, America, Africa and other regions. We provide global customers with stable supply, competitive pricing and one-stop export solutions.
Choose Zijun, Choose Stability; Cooperate with Zijun, Create Value Together.
We sincerely look forward to becoming your most reliable plastic raw material supplier and trade partner in China.
The PDF has been encrypted, and you need to enter the password for normal access.
We provide PDF for you to look at the catalog, and you need to provide an email address.