| HS Code | 673521 |
| Specific Gravity | 1.24 |
| Density | 1.24 g/cm³ |
| Melt Flow Rate | 7-9 g/10 min at 210°C/2.16 kg |
| Relative Viscosity | 3.3 |
| Tensile Strength At Yield | 55 MPa |
| Tensile Elongation At Break | 6% |
| Tensile Modulus | 3.5 GPa |
| Flexural Strength | 80 MPa |
| Flexural Modulus | 3.6 GPa |
| Notched Izod Impact Strength | 2.5 ft-lb/in (133 J/m) |
| Unnotched Izod Impact Strength | 10 ft-lb/in (534 J/m) |
| Melting Point | 165-180°C |
| Glass Transition Temperature | 55-60°C |
| Heat Deflection Temperature | 55°C at 0.45 MPa |
| Vicat Softening Point | 60°C |
| Processing Temperature | 190-220°C |
| Drying Temperature | 80°C |
| Drying Time | 4 hours |
| Moisture Content | <0.025% |
| Bulk Density | 0.8 g/cm³ |
As an accredited BG4800 High Impact Extrusion/3D Printing Polylactic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sealed 1 kg foil bag of BG4800 High Impact Extrusion/3D Printing Polylactic Acid, moisture-barrier, labeled with lot and safety data. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with palletized BG4800 High Impact Extrusion/3D Printing Polylactic Acid, shrink-wrapped and secured for ocean transport. |
| Shipping | BG4800 High Impact Extrusion/3D Printing Polylactic Acid is shipped as a non-hazardous solid in sealed, moisture-barrier bags, lined drums, or cartons. Keep containers closed, dry, cool, and away from heat, sunlight, and ignition sources. Handle with standard industrial hygiene; avoid dust generation and inhalation. Follow local regulations. |
| Storage | Store BG4800 High Impact Extrusion/3D Printing Polylactic Acid in a cool, dry, well-ventilated area away from heat, ignition sources, direct sunlight, and moisture. Keep containers tightly sealed, preferably with desiccant, to prevent hydrolysis. Avoid incompatible oxidizers, strong acids, and bases. Maintain 15–25°C, protect from UV, use original packaging, and rotate stock. Follow SDS/local rules. |
| Shelf Life | Store sealed in a cool, dry, well-ventilated area away from moisture and heat; typical shelf life is 12 months unopened. |
In large-format additive manufacturing cells fitted with pellet-fed screw extruders, BG4800 is processed at melt temperatures between 195 °C and 215 °C and heated bed temperatures of 60–80 °C. The resin is pre-dried for 4–6 h at 60 °C in desiccant dryers with a dew point of -40 °C or lower, targeting residual moisture below 250 ppm verified by Karl Fischer method ISO 15512. Screw-driven deposition heads with L/D ratios from 20:1 to 25:1 and nozzle diameters from 0.8 mm to 2.0 mm permit layer heights of 0.6–1.2 mm. Increased melt strength relative to standard PLA allows print speeds of 40–80 mm/s without corner lifting, but chamber temperatures above 45 °C degrade interlayer fusion due to localized shear thinning at the nozzle wall. Pre-dried spool edge trim or purge tailings can be incorporated at up to 10 wt% in pellet-fed hoppers without measurable loss of melt strength, provided the regrind is re-dried with virgin resin and screened through a 4 mm mesh.
Applications in this segment are limited to manufacturing aids, robotic gripper fingers, assembly jigs, foundry patterns, and vacuum-forming drill fixtures. End-use components are machined or sanded after printing; dimensional stability under load is acceptable only below 55 °C continuous service. Compliance is governed by REACH (EC) No 1907/2006 and RoHS Directive 2011/65/EU, but industrial food-contact or medical uses require formulation-specific migration testing because the impact-modifier package may not be listed under EU 10/2011. Batch-to-batch melt-flow variability should be verified per ISO 1133-1 at 210 °C and 2.16 kg before machine parameter lock. Production-scale behaviour on pellet-fed systems shows that insufficient drying is the most frequent cause of nozzle clogging and inconsistent extrusion width.
Heavy-gauge sheet extrusion of BG4800 on a single-screw extruder with L/D 30:1 and a general-purpose screw operates with barrel set points from 170 °C to 200 °C, a melt pump pressure of 8–12 MPa, and a three-roll calender stack maintained at 40–60 °C. Regrind is introduced at up to 25 wt% with virgin pellets. Above 25 wt%, the melt flow rate increases by approximately 20–30%, sheet haze intensifies, and notched Izod impact per ISO 180/1A falls below 8 kJ/m², leading to edge tear during plug-assisted forming. The regrind fraction must be ground from trimmed sheet edges only, not from degraded off-spec parts that have experienced repeated thermal cycling. Drying of mixed virgin and regrind feedstock is performed at 60 °C for 4 h to a moisture content below 250 ppm.
Thermoforming requires sheet surface temperatures of 90–110 °C on upper and lower ceramic IR banks, mold temperatures of 40–60 °C, and forming air pressure of 0.5–0.8 MPa. Plug assist materials should be syntactic polyamide or POM, and plug speed reduced to 35–50 mm/s for high-impact grades because rapid plug penetration causes localized thinning in sheets of 0.5–1.0 mm. Terminal components are industrial handling trays, transport dunnage, and reusable component trays for electronics assembly. Compliance for packaging is assessed under EN 13432:2000 only where the complete sheet formulation is certified; impact modifiers and nucleating agents may delay disintegration. Food-contact use requires migration testing under EU 10/2011 or an equivalent FDA food-contact notification for the finished sheet, not solely for the base PLA resin.
Injection moulding of BG4800 into returnable logistics boxes and kitting trays uses melt temperatures of 190–210 °C, mould temperatures of 30–50 °C, and clamping force calculated at 45–65 MPa projected cavity pressure. Screw L/D of 20:1 with a non-return valve and shut-off nozzle avoids drooling and gate stringing. For nominal wall thickness of 6 mm, fill time is set to 1.5–3.0 s, pack pressure to 60–80 MPa, and holding time to 8–12 s. High-impact PLA demonstrates lower warpage than unfilled PLA in flat trays but shows post-mould shrinkage of 0.3–0.5% after 48 h at 23 °C. Regrind from runner systems is limited to 15 wt%; higher regrind levels reduce notched Izod below acceptable values for load-bearing trays. Dimensional checks are performed per ISO 294-3 on specimens conditioned at 23 °C and 50% RH.
Mechanical acceptance relies on ISO 527-2 tensile modulus, ISO 178 flexural modulus, ISO 180/1A notched Izod, and ISO 75-2/B HDT at 0.45 MPa. Continuous-use temperature should not exceed 55 °C; above this threshold, the HDT margin collapses and stacking loads in automated storage and retrieval systems produce creep deformation. Cleaning with isopropanol or mild alkaline detergents is acceptable, but autoclave steam and hot water above 60 °C cause distortion. Terminal applications are returnable bins, separator sheets, and kitting trays used in intra-logistics. The material is not suitable for hot-fill containers or dishwasher load cycles above 55 °C, and published data for repeated dishwasher exposure is limited.
Compounding BG4800 for custom high-impact filament and sheet grades requires a co-rotating twin-screw extruder with L/D 40:1 to 44:1, modular screw segments, atmospheric and vacuum vents, and downstream side feeding. A representative formulation contains 100 parts PLA, 5–15 phr core-shell impact modifier, 0.2–0.5 phr polymeric chain extender, 0.1–0.3 phr antioxidants, and optionally 0.1–0.3 phr nucleating agent. Barrel temperatures from the feed throat to the die are set at 160 °C, 175 °C, 185 °C, 190 °C, 190 °C, with die temperature at 190 °C. Screw speeds are maintained between 250 min⁻¹ and 350 min⁻¹; above 350 min⁻¹, melt temperature excursion above 205 °C accelerates lactide reformation and molecular weight loss.
Process conflicts appear as torque fluctuation beyond ±10%, die pressure surging, and pellet surface roughness. Specific mechanical energy input is controlled between 0.16 kWh/kg and 0.22 kWh/kg by adjusting feed rate and mixing elements; excessive shear thinning in the impact-modifier phase lowers dispersion and creates impact-strength anisotropy between machine and transverse directions. The compounded pellets are strand-pelletized through a water bath at 30–40 °C and then dried for 4 h at 60 °C to below 250 ppm moisture. Quality control includes ISO 1133-1 MFR at 210 °C/2.16 kg, ISO 527-2 tensile properties, ISO 180/1A notched Izod, and ISO 306/B50 Vicat softening temperature.
Terminal products are compounded pellets supplied to filament extruders, sheet lines, and injection moulders. Downstream converters must reformulate the impact-modifier package if food-contact or compostability claims are required because core-shell modifiers and chain extenders are not universally cleared under EU 10/2011 or EN 13432:2000. The operational boundary is strict: the compounding window is ±5 °C at the die, and prolonged residence time above 210 °C causes darkening and viscosity loss even with vacuum venting. Avoid combination with amine-based processing aids, which can accelerate chain scission in PLA melt.
For fused filament fabrication filament production, BG4800 is converted into 1.75 mm and 2.85 mm diameter filament on single-screw extruders with L/D 25:1, gear pump melt delivery, and closed-loop laser diameter control. Barrel set points range from 175 °C to 195 °C, with die temperature at 190 °C and water bath temperature at 35–50 °C. Melt filtration through 100–150 µm screen packs removes gel particles from the impact modifier. Diameter tolerance is held to ±0.05 mm, ovality below 0.08 mm, and winder tension between 0.1 N and 0.2 N. Color masterbatch or nucleating masterbatch addition is limited to 2–3 wt% to avoid diameter instability; filament scrap can be re-compounded at up to 5 wt% only after grinding and drying.
High-impact filament from BG4800 is used for protective enclosures, jigs, and large prototypes printed on open-frame FFF machines with bed temperatures of 50–70 °C. The filament is not recommended for heated chamber machines above 60 °C because the material softens and loses spool stability. Compliance is typically limited to REACH and RoHS; flammability classification under UL 94 HB can be considered for electronics housing prototypes only if the impact-modifier package does not increase burning rate beyond the specified limit. Batch-to-batch viscosity variation should be checked through capillary rheometry at 210 °C before setting the haul-off ratio.
High-impact PLA is used for additively manufactured composite layup tools and drill fixtures in out-of-autoclave processing where cure cycles do not exceed 65 °C. Tools printed with 10–15 mm thick shells and 20–40% gyroid infill are vacuum-bagged and subjected to 50–65 °C oven cure with 0.8–0.9 bar vacuum. Under these conditions, the tool surface remains dimensionally stable for a limited number of cycles, but published data for this specific configuration is limited; cycle count must be validated on a design-specific basis. Compliance with aerospace non-structural tooling specifications is not automatic; material must be screened for outgassing per ASTM E595 if the tool is vacuum-bagged during cure.
Failure modes include surface pitting at peel-ply interfaces, corner softening at local overshoot above 70 °C, and interlaminar debonding in thick sections due to residual stress. Any secondary machining should be performed with sharp carbide cutters at low spindle speeds to avoid frictional heating above 55 °C. Terminal applications are low-volume composite manufacturing aids for aerospace prototyping and marine instrument housings. The material is not acceptable for autoclave tools or production rates exceeding 50 cycles without refurbishment, because repeated thermal cycling below the HDT limit still accumulates viscoelastic creep at tool corner radii.
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The BG4800 High Impact Extrusion/3D Printing Polylactic Acid is an impact-modified PLA compound supplied as pellet feedstock for fused filament fabrication, pellet-fed additive manufacturing, twin-screw compounding, single-screw extrusion, and injection molding. The grade is specified with a nominal melt flow rate of 6 g/10 min to 10 g/10 min at 210 °C under 2.16 kg load as measured per ISO 1133-1:2022. The polymer matrix is polylactic acid, and the impact modification is present as a discrete elastomeric phase; this morphology reduces notch sensitivity but also lowers the continuous service temperature relative to unmodified PLA, as reflected in the thermal values tabulated below. The product designation BG4800 separates it from unmodified PLA grades and from high-heat PLA compounds, because the primary design target is high work-to-break and reduced notch sensitivity rather than elevated heat deflection or chemical resistance.
The nominal property envelope reported for the compound is summarized in Table 1. Each value represents a batch-release or typical literature band, not a maximum service value. Tensile and flexural measurements should follow the conditioning protocols of ASTM D618-21 or ISO 291:2008; notched impact values are sensitive to notch radius, specimen thickness, and moisture content.
| Property | Test method | Nominal range |
|---|---|---|
| Density | ISO 1183-1:2019 | 1.20–1.25 g/cm³ |
| Melt flow rate | ISO 1133-1:2022 | 6–10 g/10 min at 210 °C/2.16 kg |
| Tensile strength at yield | ASTM D638-14 | 38–48 MPa |
| Tensile elongation at break | ASTM D638-14 | 18–40% |
| Flexural modulus | ISO 178:2019 | 2.0–2.8 GPa |
| Notched Izod impact | ASTM D256-10 | 80–150 J/m |
| Notched Charpy impact | ISO 179-1:2020 | 12–25 kJ/m² |
| Heat deflection temperature | ISO 75-2:2013 method B | 50–58 °C at 0.455 MPa |
| Vicat softening temperature | ISO 306:2013 method B50 | 55–62 °C |
Compared with standard extrusion PLA, BG4800 trades tensile strength and stiffness for work-to-break. An unmodified PLA grade typically produces a notched Izod impact of 20–35 J/m and elongation at break below 8% under ASTM D638-14; the impact-modified BG4800 raises the Izod value into the 80–150 J/m band while decreasing tensile yield strength to 38–48 MPa. The difference arises from the elastomer domain size and interphase adhesion: when the modifier domains remain below 1 µm and are uniformly dispersed, craze initiation in the PLA matrix is suppressed, but the continuous PLA phase remains the load-bearing component. Against ABS, BG4800 lacks the high heat deflection temperature of 85–100 °C at 0.455 MPa; against PETG, BG4800 exhibits a lower equilibrium moisture plateau at 50% RH and a different volatile profile during extrusion. Published emission data for this specific configuration is limited and should be benchmarked under ANSI/CAN/UL 2904 where indoor air quality constraints apply. Table 2 places these differential properties in direct comparison for material selection.
| Property | BG4800 high-impact PLA | Standard PLA | ABS | PETG |
|---|---|---|---|---|
| Notched Izod impact per ASTM D256-10 | 80–150 J/m | 20–35 J/m | 150–300 J/m | 80–120 J/m |
| Tensile strength per ASTM D638-14 | 38–48 MPa | 60–68 MPa | 32–42 MPa | 45–55 MPa |
| Elongation at break | 18–40% | 3–8% | 10–30% | 15–25% |
| HDT at 0.455 MPa per ISO 75-2:2013 method B | 50–58 °C | 50–55 °C | 85–100 °C | 65–70 °C |
Hydrolytic degradation is the main process conflict. Polylactic acid undergoes random chain scission when residual moisture reacts with ester linkages at melt temperature. At 23 °C and 50% RH, PLA approaches an equilibrium moisture content near 0.3 wt%; processing requires 0.025 wt% (250 ppm) or lower. Pellets must be dried in a desiccant dryer at 60–80 °C for 4–6 h until a dew point below -40 °C is recorded at the dryer outlet. Drying at temperatures above 85 °C risks pellet bridging and fusion because the material approaches its Vicat softening range. At ambient relative humidity above 60%, pre-drying before extrusion or printing is mandatory, and hopper inlet air should be kept below -40 °C dew point with a desiccant wheel, not a hot-air oven alone. If the dryer hopper is reloaded without purging, moisture-laden pellets entering the feed throat produce a drop in melt viscosity, die pressure fluctuation, and loss of nozzle back pressure on 3D printers.
On direct-drive fused filament fabrication systems with an all-metal hot end, the BG4800 filament is processed at nozzle set temperatures of 210–230 °C, a build plate temperature of 50–60 °C, and a print speed of 40–60 mm/s for 0.4 mm nozzles. First-layer height is typically set at 0.20 mm; retraction of 1.0–2.0 mm at 30–40 mm/s reduces stringing without causing plugging in the melt zone. Unlike standard PLA, the impact-modified version benefits from reduced cooling fan speed on tall thin walls, because high cooling gradients produce interlayer residual stress and warping; however, bridge quality depends on print speed, part cooling, and melt temperature. A heated enclosure is not required for sections below 150 mm in the build plane, but door gasketing and a chamber temperature of 30–35 °C are used where ambient temperature fluctuations exceed ±2 °C. On pellet-fed extrusion systems, barrel temperatures should follow a rising profile from 160 °C at the throat to 195 °C at the die, with die pressure maintained by a melt pump rather than screw speed alone.
Before processing, pellet lots should be inspected by melt flow index and moisture analysis. A lot accepted for extrusion at 8 g/10 min may still produce filament diameter variation above ±0.05 mm if the MFR difference between regrind and virgin pellets is not controlled within the batch-release tolerance. Filament extrusion lines with a laser diameter gauge should use closed-loop melt pump speed to maintain diameter; puller speed trim below 1% is required at 1.75 mm filament because the lower melt strength of impact-modified PLA amplifies sag.
BG4800 pellets are typically a ready-to-use compound, but in-house dilution with regrind or masterbatch requires a co-rotating twin-screw extruder with L/D 40:1 or higher, vacuum venting at -0.08 MPa, and independent side feeding for the impact-modifier masterbatch. When the modifier is added at the main feed throat along with PLA pellets, separation can occur during solids conveying, especially at screw speeds above 250 rpm, producing lot-to-lot Izod variation. Side feeding after the first kneading block allows the PLA to melt and convey before the elastomer is introduced, producing modifier domain sizes below 1 µm when shear rate remains above 100 s⁻¹ in the mixing zone. Torque limits on a 26 mm co-rotating twin-screw extruder may be approached if the total modifier content is increased beyond the original compound design; torque monitoring should be linked to feeder shutdown if melt temperature exceeds 210 °C at the die. Vacuum venting must be maintained because residual water and low-molecular-weight volatiles become trapped and increase die lip build-up.
Operational boundaries for BG4800 are defined by hydrolytic stability, shear heating, and thermal service. The material should not be compounded with amine-based additives due to premature crosslinking and uncontrolled chain extension unless the line is equipped with continuous melt pressure and torque recording. It is incompatible with aqueous cooling baths above 60 °C for prolonged strand annealing, which can induce crystallinity and embrittlement unless an annealing oven is separately controlled. The product is not recommended for continuous load-bearing components exposed to air at temperatures above 55 °C, or for immersion in alkaline solutions with pH above 9 at 40 °C. Compliance statements are limited to REACH and RoHS 2011/65/EU for heavy-metal restrictions; food-contact suitability must be validated on the final part under FDA 21 CFR 175.300 and EU Regulation 10/2011 because impact modifiers and processing aids migrate differently than neat PLA. Published data for the exact BG4800 configuration under UV weathering is limited; outdoor or point-of-sale displays require testing under ASTM D4329 or ISO 4892-2.
