eSUN ASA+ Grey 1.75mm 1kg 3D Printer Filament
Price in Sri Lanka

The eSUN ASA+ Grey 1.75mm 1kg 3D Printer Filament is an advanced engineering-grade thermoplastic filament synthesized from Acrylonitrile Styrene Acrylate (ASA) and fortified with impact-modifying additives for demanding functional, automotive, and outdoor 3D printing applications. Developed as an evolution of traditional ABS, ASA+ replaces butadiene rubber with a weather-resistant acrylic elastomer matrix that provides outstanding defense against solar ultraviolet (UV) radiation, oxidative degradation, and environmental stress cracking. Featuring high thermal deflection resistance (up to ~96°C), exceptional interlayer adhesion, and a neutral, professional industrial grey matte finish, this filament produces robust end-use parts that maintain structural integrity and dimensional stability under continuous sun and weathering exposure.

Specifications

• Brand / Series: eSUN Industrial / Engineering Series (eASA / ASA+)
• Polymer Chemistry: Acrylonitrile Styrene Acrylate (Modified Terpolymer with Acrylic Elastomer)
• Filament Diameter: 1.75 mm (±0.03 mm dimensional tolerance)
• Net Filament Weight: 1.0 kg (1000 g / ~2.2 lbs)
• Color / Surface Finish: Industrial Grey (Satin / Semi-Matte functional finish)
• Extruder / Printing Temperature Range: 240°C to 270°C (Recommended ~250°C to 260°C)
• Heated Bed Temperature Range: 90°C to 110°C (PEI sheet, glass bed, or textured build plate)
• Build Chamber Requirements: Enclosed Heated / Insulated Chamber Recommended (Chamber temp ~40°C to 60°C)
• Print Speed: 40 to 100 mm/s (High-speed capable on enclosed CoreXY systems up to 250 mm/s with high hotend flow)
• Cooling Fan Speed: 0% to 20% (Low to disabled cooling to maximize layer bonding strength)
• Density: Approx. 1.06 g/cm³ to 1.08 g/cm³
• Melt Flow Index (MFI): Approx. 12 to 18 g/10 min (at 220°C / 10 kg)
• Heat Deflection Temperature (HDT): Approx. 92°C to 96°C (at 0.45 MPa)
• Tensile Strength: ≥ 40 MPa to 48 MPa
• Elongation at Break: Approx. 15% to 25% (High impact ductility)
• Flexural Modulus: Approx. 1800 MPa to 2200 MPa
• Izod Impact Strength: ≥ 25 kJ/m² to 32 kJ/m² (Notched)
• Spool Construction: Recyclable Heavy-Duty Transparent/Black Spool with Level Windows
• Spool Dimensions: Approx. 200 mm Flange Diameter × 65 mm Width (Arbor hole: 54 mm)
• Gross Weight: Approx. 1.25 kg to 1.35 kg (Filament and spool packaging combined)

Features

• Superior UV & Weathering Resistance: Unlike ABS, which rapidly yellows, degrades, and embrittles under direct sun exposure due to butadiene degradation, the acrylic rubber core in ASA+ provides permanent UV stability and prevents chalking.
• High Thermal Deflection: Withstands elevated environmental temperatures up to ~95°C without deformation or creep, making it suitable for automotive interiors, engine bay brackets, and outdoor enclosures.
• Reduced Warping Formulation: Modified with anti-shrinkage polymers that reduce the high thermal contraction coefficient typical of standard ABS, lowering corner curl on enclosed beds.
• Easy Post-Processing & Vapor Smoothing: Readily soluble in acetone, allowing parts to be vapor-smoothed into a glass-like glossy finish or chemically welded using acetone-based slurry.
• Neutral Industrial Aesthetic: The matte grey tone highlights surface details cleanly while hiding minor layer lines, delivering an OEM-style appearance for production brackets, electronic housings, and mechanical fixtures.

Common Applications

• Automotive Exterior & Interior Parts: Printing custom side-mirror covers, roof-rack brackets, bumper trim clips, sensor bezels, and dashboard gauge pods exposed to high sun and heat.
• Outdoor IoT & Sensor Enclosures: Protective weather-sealed housings for agricultural telemetry nodes, solar weather stations, security camera mounts, and antenna brackets.
• Marine & Boating Hardware: Custom deck fixtures, fishing rod holders, drain fittings, and instrument bezels resistant to saltwater spray and UV breakdown.
• Robotics & Drone Structures: High-impact chassis decks, landing skids, motor brackets, and protective roll-cages for outdoor rovers and UAVs.
• Industrial Tooling & Jigs: Functional factory assembly fixtures, pipe clamps, chemical-resistant fluid transfer brackets, and heavy-duty switch covers.

Usage Tips

• Enclosure & Draft Control (CRITICAL):
  • Print ASA+ strictly inside an enclosed 3D printer to maintain ambient air temperatures around 40°C to 60°C.
  • Cold drafts or rapid room air temperature fluctuations will cause immediate thermal stress shrinkage, resulting in layer delamination, corner lifting, or parts popping off the build sheet. Keep the cooling fan set to 0% (or max 10%–20% for small overhangs/bridges).
• Bed Adhesion Preparation:
  • Set bed temperature to 90°C to 105°C on a textured PEI plate.
  • For smooth PEI, glass, or bare build plates, apply a thin layer of specialized bed adhesive (such as PVP glue stick, Magigoo, or ABS/ASA slurry) to promote adhesion during printing and act as a release barrier when cooled.
• Filament Drying & Moisture Sensitivity:
  • ASA is moderately hygroscopic and absorbs atmospheric moisture, causing nozzle popping (micro-steam explosions), stringing, and weakened layer lamination.
  • If the spool has been unsealed or exposed to humid workshop air, dry the spool in an active filament dryer at 70°C to 80°C for 4 to 6 hours prior to printing. Store in a vacuum-sealed bag with desiccant when not in use.
• Acetone Vapor Smoothing: To achieve a high-gloss, injection-molded appearance and hermetic water sealing, suspend the finished print inside an airtight smoothing chamber with a light acetone vapor mist for 15 to 30 minutes. Always perform vapor smoothing in a well-ventilated space away from open sparks or flame.
• Ventilation & Fume Filtration: While ASA emits lower styrene emissions than raw ABS, it does off-gas volatile organic compounds (VOCs) and ultra-fine particles at extrusion temperatures (>250°C). Operate the printer in a well-ventilated area or utilize an enclosure equipped with an active carbon and HEPA filtration unit (e.g., Nevermore filter).