KUMHO SAN-335T

KUMHO SAN-335T

KUMHO SAN-335T is a premium styrene acrylonitrile (SAN) resin manufactured by Kumho Petrochemical[cite: 11]. Engineered specifically for high clarity applications, this grade features superior transparency combined with a distinct blue tint and ice aesthetic[cite: 11]. Its well-balanced mechanical, thermal, and physical properties make it an ideal choice for manufacturing clear consumer goods and rigid housing components with high surface quality[cite: 11].

Key Features

• High transparency with a distinctive blue tint and ice aesthetic finish[cite: 11].
• Excellent mechanical performance, including high tensile and flexural strength[cite: 11].
• High rigidity with a Rockwell Hardness rating of 84 (M scale)[cite: 11].
• Low mold shrinkage (0.2 - 0.6%) for precise dimensional control[cite: 11].
• Good thermal stability with a Vicat softening temperature of 107°C[cite: 11].

Technical Specifications

• Material Type: Styrene Acrylonitrile (SAN)[cite: 11]
• Grade: SAN 335T[cite: 11]
• Density: 1.07 g/cm³ (ASTM D792)[cite: 11]
• Melt Flow Index (230°C, 3.8kg): 10.0 g/10min (ASTM D1238)[cite: 11]
• Melt Flow Index (200°C, 5.0kg): 3.0 g/10min (ASTM D1238)[cite: 11]
• Mold Shrinkage: 0.2% - 0.6% (ASTM D955)[cite: 11]
• Water Absorption: 0.3% (ASTM D570)[cite: 11]
• Tensile Strength: 710 kg/cm² / 10,082 psi (ASTM D638)[cite: 11]
• Elongation: 4.5% (ASTM D638)[cite: 11]
• Flexural Strength: 1,050 kg/cm² / 14,910 psi (ASTM D790)[cite: 11]
• Flexural Modulus: 34,500 kg/cm² / 489,900 psi (ASTM D790)[cite: 11]
• Izod Impact Strength (3.2mm): 1.5 kg·cm/cm / 0.28 ft·lb/in (ASTM D256)[cite: 11]
• Rockwell Hardness: 84 (M scale, ASTM D785)[cite: 11]
• Heat Deflection Temperature (18.6 kgf/cm²): 92°C / 198°F (ASTM D648)[cite: 11]
• Vicat Softening Temperature (1kg, 50°C/h): 107°C / 225°F (ASTM D1525)[cite: 11]
• Flammability Rating (UL 94): HB (at 1.6mm thickness)[cite: 11]

Applications

• Cups and drinking vessels[cite: 11]
• Water tanks for humidifiers[cite: 11]
• Mixer and juicer containers[cite: 11]
• Pencil cases and stationeries[cite: 11]
• CD cases[cite: 11]
• Clear office supply applications[cite: 11]

Recommended Processing Conditions (Injection Molding)

• Drying Temperature: 75 - 85°C[cite: 11]
• Drying Time: 2 - 4 hours[cite: 11]
• Nozzle Temperature: 190 - 220°C[cite: 11]
• Barrel Temperature (Front): 190 - 210°C[cite: 11]
• Barrel Temperature (Middle): 180 - 200°C[cite: 11]
• Barrel Temperature (Rear): 170 - 190°C[cite: 11]
• Hopper Throat Temperature: 45°C[cite: 11]
• Mold Temperature: 40 - 70°C[cite: 11]