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

The eSUN ASA+ Black 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 outdoor, functional, and automotive 3D printing applications. Developed as a superior alternative to standard ABS in harsh environments, ASA+ replaces butadiene rubber with a weather-resistant acrylic elastomer matrix that provides exceptional resistance to solar ultraviolet (UV) radiation, oxidative degradation, and environmental stress cracking. Featuring high thermal deflection resistance (up to ~96°C), excellent interlayer adhesion, and a deep, non-fading matte black finish, this filament produces rugged end-use parts that maintain structural integrity and color depth under long-term direct sunlight.

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: Deep Solid Black (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 black ABS, which turns brittle and chalky under direct solar exposure due to butadiene breakdown, the acrylic rubber core in ASA+ provides permanent UV stability and prevents surface oxidation.
• High Thermal Deflection: Withstands elevated operating temperatures up to ~95°C without softening or warping, making it ideal for automotive interiors, engine bay components, and outdoor equipment.
• 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 prints to be vapor-smoothed into a high-gloss, injection-molded finish or chemically welded using acetone slurry.
• Anti-Static Surface Behavior: Generates lower surface triboelectric charges than standard plastics, significantly reducing ambient dust accumulation on outdoor sensors and exterior casings.

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).