| HS Code | 120897 |
| Density | 1.35 g/cm³ |
| Melt Flow Rate | 10-20 g/10 min at 210°C/2.16 kg |
| Tensile Strength | 40 MPa |
| Tensile Elongation At Break | 10% |
| Flexural Modulus | 4000 MPa |
| Flexural Strength | 60 MPa |
| Notched Izod Impact | 50 J/m |
| Unnotched Izod Impact | 300 J/m |
| Heat Deflection Temperature At 1 82 Mpa | 55 °C |
| Vicat Softening Point | 60 °C |
| Rockwell Hardness | R85 |
| Linear Mold Shrinkage | 0.5-0.8% |
| Moisture Absorption | 0.1% |
| Ul94 Flammability Rating | HB |
| Bio Based Content | 70% |
| Filler Content | 20% |
| Processing Temperature | 190-210 °C |
As an accredited RTP 2099 X 124790 C Impact Modified Mineral Bio-Based Polylactic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | RTP 2099 X 124790 C supplied in 25 kg sealed moisture-barrier bags, palletized, stretch-wrapped, and labeled with product identification. |
| Container Loading (20′ FCL) | 20′ FCL containing RTP 2099 X 124790 C Impact Modified Mineral Bio-Based Polylactic Acid, packaged and securely braced for transport. |
| Shipping | RTP 2099 X 124790 C Impact Modified Mineral Bio-Based Polylactic Acid ships as a non-hazardous solid in sealed moisture-barrier bags, fiber drums, or octabins. Store cool, dry, away from heat, moisture, and UV. Handle using standard industrial hygiene; avoid dust and static. Typically not regulated for transport. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat, moisture, and ignition sources. Keep in tightly sealed original packaging or moisture-barrier bags to prevent hydrolysis and contamination. Avoid prolonged exposure to high temperatures; follow supplier recommendations. Separate from incompatible oxidizers. Protect from physical damage, use first-in, first-out stock rotation, and ensure containers remain labeled, closed, and stable. |
| Shelf Life | Shelf life is 12 months from manufacture when stored in original, unopened packaging under cool, dry conditions; protect from moisture. |
Application routes described below are confined to established downstream converting paths for impact-modified mineral-filled bio-based polylactic acid of the RTP 2099 X 124790 C class. Processing values are representative of this compound family unless the specific grade data has been published; where published data for a specific configuration is limited, the text states that limitation. No route assumes continuous service above 60 °C without annealing, and all routes require desiccant drying to below 250 ppm moisture when ambient relative humidity exceeds 60%.
The primary converting route for cosmetic packaging uses the compound as a direct injection-molded resin at 100 wt% delivery, with in-house regrind permitted from 10 wt% to 25 wt% after drying to 200–250 ppm moisture; color masterbatch is added at 1–3 wt% when tinting is required. Regulatory compliance for packaging placed on the EU market falls under the Packaging and Packaging Waste Directive 94/62/EC for combined heavy metal concentration lead, cadmium, mercury, and hexavalent chromium at or below 100 mg/kg, with REACH Regulation (EC) No 1907/2006 SVHC screening and CLP classification for supplied articles. Direct skin contact with cosmetic formulations does not automatically require Commission Regulation (EU) No 10/2011 food-contact testing; if the same package is marketed for food contact or secondary food packaging, the converter must perform specific migration tests on the finished article. Predrying in desiccant dryers with dew point of −40 °C is maintained for 4–6 h at 80–90 °C. Injection molding is carried out on reciprocating-screw machines with clamp force between 1,200 kN and 3,000 kN depending on cavity count; barrel zones are set from 170–185 °C in the feed section to 190–210 °C at the metering zone, nozzle temperatures 195–210 °C, hot runner manifold 200–215 °C, and mold temperatures 25–40 °C. Shear-induced chain scission is controlled by limiting screw peripheral speed to 0.3–0.6 m/s and back pressure to 0.4–0.7 MPa. The mineral filler raises melt pressure in multi-cavity tools; hot runner tip shear rates above 104 s−1 should be avoided because localized temperature spikes degrade impact modifier distribution. Terminal product types for this route include heavy-bottom jars, overcap assemblies, face-compact housings, lipstick tubes, and refillable skincare containers. Wall-thickness transitions below 1.5 mm are not recommended for snap-fit closures unless gate locations are positioned to move weak weld lines away from latching features.
Regrind is capped in this converting route because the impact modifier and mineral filler are already near their thermal-stability boundary after first heat history. For extruded sheet intended for foodservice trays, the recommended formulation is 75–85 wt% dried compound blended with 15–25 wt% post-industrial PLA edge trim or flake that has been crystallized and dried to below 250 ppm moisture. Exceeding 25 wt% regrind raises melt temperature variation and increases gel formation at the die lip, causing sheet thickness fluctuation and thermoforming splits. Compliance requires Commission Regulation (EU) No 10/2011 migration testing on the final article using food simulants appropriate to the intended food type, as well as EN 13432 for industrial compostability only when the converted article is included in a certified packaging scheme; certification is not automatic from the compound and depends on thickness, print coverage, and colorant loading. For United States food-contact status, an applicable Food Contact Notification or FDA 21 CFR citation must be confirmed through the compounder because PLA is not covered by FDA 21 CFR 177.1520. Sheet extrusion uses a single-screw extruder with L/D ratio 30:1–36:1, barrier screw geometry, screen pack 40/60/80, and gear pump before the flat die; barrel temperatures are 160–205 °C from feed to metering, die temperatures 195–210 °C, and polished or matte chill rolls at 40–60 °C. The mineral filler increases melt strength and helps resist sheet sag during thermoforming, but it narrows the forming window: preheat surface temperature is 90–115 °C, mold temperature 25–40 °C, and assistance from plug tooling is required for cavity depths greater than 1:1 draw ratio. Finished product types include cold-cut trays, produce punnets, clamshell packs, deli lids, and insert trays for ambient or chilled foods; hot-fill and retort use are outside the operational boundary.
When the compound is molded into construction blocks and educational play components, the controlling standards shift to mechanical drop performance and elemental migration, not simple packaging endurance. EU toys fall under Directive 2009/48/EC with EN 71-1 mechanical and physical properties, EN 71-2 flammability, and EN 71-3 migration of nineteen elements in material categories I, II, and III; US distribution uses ASTM F963-23 with soluble substrate extraction in 0.07 mol/L HCl. The compound is processed at 100 wt% as delivered with 2–3 wt% color masterbatch; post-industrial regrind is held to 10 wt% maximum because traceability to contamination-free feedstock is required for recertification under EN 71-3. Molding uses hydraulic or toggle machines with clamp force between 800 kN and 2,200 kN, barrel temperatures 180–205 °C, mold temperatures 20–35 °C, and screw speeds 0.3–0.5 m/s to limit shear heating in thick-wall block geometries. Venting at 10–15 µm depth is required at the end of flow paths to prevent gas burn and weakened knit lines; gate lands are shortened and cold-slug wells enlarged because the mineral filler can accelerate abrasive wear of gate inserts. Terminal product types include interlocking construction blocks, stacking rings, shape-sorting components, early-learning instrument bases, and sand-play molds. Operational boundary: components intended for mouthing must be evaluated on the finished part, not on the pellet, because color masterbatch and regrind can shift extraction values.
Household storage components are converted without coupling or compatibilizer addition because the mineral filler already provides enough dimensional stability for flat panel retention. The compound is metered at 100 wt% or blended with 15–25 wt% in-house regrind dried to below 200 ppm moisture; color masterbatch is added at 1–2 wt% when tinting is required. Compliance is limited to REACH Regulation (EC) No 1907/2006 Annex XVII restrictions and EU Packaging Directive 94/62/EC heavy metal limits; RoHS Directive 2011/65/EU applies only when printed electronics, metal coatings, or external ink systems add restricted substances. Injection molding machines with clamp force 800–2,500 kN produce wall sections from 2.5 mm to 4.0 mm, with melt temperature 185–205 °C and mold temperature 25–40 °C; long flow paths beyond 250 mm require sequential valve gating to prevent surface blush and premature freeze-off. Terminal product types are stackable storage trays, drawer dividers, closet organizer panels, modular shoe-box frames, and under-bed containers. The mineral filler reduces stacking deformation under static load compared with unfilled PLA, but surface gloss is lower; mechanical texturing or matte polishing is preferred for visible top surfaces.
Desktop accessory housings and cable-management shells impose snap-latch impact and screw-boss creep requirements, making impact modification necessary but flexural modulus still relevant. The processing recipe is 100 wt% compound with 2–4 wt% color masterbatch, or 10–20 wt% unmodified PLA regrind where higher stiffness is required; adding unmodified PLA raises flexural modulus but reduces impact strength, so reverse-injection comparison under ISO 180 or ASTM D256 is mandatory before part qualification. RoHS Directive 2011/65/EU and REACH Regulation (EC) No 1907/2006 SVHC screening apply to the finished article; the material has no inherent UL 94 classification and must be separately flame-tested at the relevant thickness if placed near low-voltage electronics. Molding conditions use barrel temperatures 185–205 °C, mold temperatures 25–40 °C, injection speeds 30–80 mm/s, and wall thickness 1.8–3.0 mm; gate diameters from 0.8 mm to 1.2 mm are selected to prevent jetting, and textured cavity surfaces are used to mask mineral filler flow lines around bosses and ribs. Terminal product types include monitor stand bases, cable raceway covers, headphone stand arms, desk drawer fronts, and under-desk tray panels. Limit: snap-fit deflections exceeding 2.0 mm require finite-element analysis with moisture-conditioned modulus input, because humid service softens PLA-based compounds.
Office supply component molding with this compound favors low-shear plasticating units because the impact modifier phase decreases melt strength and tolerates less screw work than neat PLA. The compound is processed at 100 wt% with 1–2 wt% color masterbatch; in-house regrind is limited to 15 wt% after drying to 250 ppm moisture because higher regrind levels reduce surface hardness and ink adhesion on pen barrels. Compliance is REACH Regulation (EC) No 1907/2006 and, if marketed as children’s stationery, EN 71-3 migration testing; no food-contact or packaging status is implied for office articles. Injection molding uses clamp force 150–800 kN, barrel temperatures 175–200 °C, and low-compression screws with ratios from 2.2:1 to 2.8:1 to avoid over-shear at small shot weights. Terminal product types include pen barrels, marker caps, tape dispenser bodies, binder spine covers, and document clip frames. Screw diameters below 25 mm should avoid high-shear check rings because local pressure spikes generate unattached melt flakes that appear as surface specks in translucent thin-wall sections.
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RTP 2099 X 124790 C is an impact-modified, mineral-filled compound prepared from a poly(lactic acid) matrix and supplied as cylindrical pellets for injection molding, sheet extrusion, and selected profile extrusion operations. The model designation follows the supplier’s 2099 series for PLA-based materials: the X denotes a custom formulation outside the standard published series, and the 124790 C identifier defines the specific mineral and impact-modifier package, including the color-control revision. Because this is a lot-controlled custom compound, physical properties and process settings must be confirmed against the lot certificate of analysis rather than inferred from generic PLA literature.
The bio-based carbon fraction is determined by accelerator mass spectrometry according to ASTM D6866-22 Method B or EN 16640:2017. The PLA matrix typically contains more than 95 % biomass-derived carbon, but the inorganic mineral filler is non-carbonaceous and therefore reduces the reportable bio-based carbon percentage of the total compound. The exact value depends on filler loading and is reported in the CoA. Published data for this specific configuration is limited when the filler type and loading are not disclosed on the lot documentation.
Designation for recycling and marking should follow ISO 11469:2016; if the mineral content exceeds the marking threshold, the molded part should be marked with a PLA-mineral identification code as specified in the standard. The product should not be designated as compostable unless a separate certification under EN 13432:2000 or ASTM D6400-23 is issued for this exact compound.
Simultaneous mineral reinforcement and impact modification creates a three-phase morphology: a continuous PLA phase, dispersed mineral particles, and discrete elastomer domains. The mineral phase raises flexural modulus and heat deflection temperature through hydrodynamic reinforcement and restricted chain mobility, while the elastomer phase dissipates impact energy through cavitation and shear yielding. The net mechanical response is not additive, because the mineral particles can act as crack-initiation sites, while the impact modifier can lower modulus and increase elongation at break.
Tensile properties should be measured on injection-molded specimens conditioned at 23 °C and 50 % relative humidity for 40 h under ISO 291:2008. Tensile strength is evaluated according to ISO 527-1:2019 with a Type 1A specimen at 1 mm/min for modulus and 5 mm/min for strength. Flexural modulus is determined under ISO 178:2019 at 2 mm/min. Notched Izod impact is evaluated according to ASTM D256-23 Method A with a 0.25 mm notch radius and a pendulum impact velocity of 3.46 m/s.
Neat PLA notched Izod values at 23 °C are commonly reported in the 16–32 J/m range. Mineral-filled PLA without impact modification often remains within or slightly below that range because rigid particles can embrittle the matrix. Impact-modified PLA compounds may exceed 80 J/m at 23 °C when modifier dispersion and domain size are controlled, but these values are formulation-specific. For RTP 2099 X 124790 C, lot-specific notched Izod data must be read from the CoA. Any application design requiring notched Izod values above 80 J/m at 0 °C should be validated by instrumented puncture testing under ASTM D3763-18 rather than estimated from generic PLA literature.
The mineral filler also shifts the ductile-to-brittle transition to higher strain rates. A compound may show high notched Izod values under laboratory pendulum conditions but still fail in a brittle mode under multi-axial impact at low temperature. Therefore, impact performance should be characterized at the intended service temperature and at the lowest wall thickness expected in the molded part.
Pre-drying is the first binding constraint in melt processing. PLA is hydrolytically sensitive at melt temperature; residual moisture above 0.025 % by mass causes molecular weight reduction, viscosity loss, silver streaks, splay, and embrittlement. A twin-bed desiccant dryer with a dew point of −40 °C or lower and an air flow rate of 0.06 m³/min per kg/h is required. Drying at 80 °C for 4 h is typically sufficient for pellets stored in sealed moisture-barrier bags; open containers exposed to 50 % relative humidity for more than 8 h require re-drying. Moisture content should be verified by ISO 15512:2019 Method B, with a limit of ≤0.025 % before processing.
Melt processing is performed on a co-rotating twin-screw extruder with a 40:1 L/D ratio for compounding; injection molding uses a 30–80 mm reciprocating screw with an L/D of 20:1 and a compression ratio of 2.5:1. Barrier screws and bimetallic barrels are specified because mineral fillers increase abrasive wear. Barrel temperatures from feed to nozzle may follow a reverse profile: feed 180 °C, compression 190 °C, metering 195 °C, nozzle 200 °C. Melt temperature should not exceed 210 °C for more than 10 min; residence time above 230 °C accelerates thermal degradation and lactide reformation. Mold temperature is typically 25–40 °C for fast cycle times. Higher mold temperatures up to 100 °C promote crystallization and dimensional stability but increase cycle time and should be validated by differential scanning calorimetry under ISO 11357-1:2023.
Thermal degradation in PLA proceeds through random chain scission, unzipping, and ester interchange. The degradation rate accelerates sharply when melt temperature exceeds 210 °C or when hot-runner manifold temperature remains above 215 °C. Production-scale hot-runner molds with externally heated manifolds and valve-gated drops exhibit lower molecular weight retention than cold-runner molds because the material remains molten in the manifold for the entire cycle. The relevant control measure is not barrel set point alone, but the product of melt residence time and temperature.
For RTP 2099 X 124790 C, the melt should be kept below 210 °C and hot-runner drops below 215 °C. Start-up after a stoppage longer than 10 min should include a purge with a PLA-compatible purging compound or fresh material until discoloration and die-lip residue disappear. Lot-specific thermal stability can be checked by melt flow rate retention after 10 min residence time using ISO 1133-1:2022 at 210 °C with 2.16 kg load.
Mineral filler increases the thermal conductivity of the melt, which can reduce hot spots but also accelerates heat transfer from the barrel wall into the material. Excessive shear generated by small gates below 0.8 mm diameter or fill times below 0.5 s may produce viscous heating above the degradation threshold even when barrel set points are lower. If the mold has an edge gate or pin gate below 0.8 mm, mold-filling simulation should be combined with short-shot studies to estimate shear heating and avoid local melt temperatures above 220 °C.
Differentiation from unfilled PLA, high-heat PLA, and conventional mineral-filled PLA is defined by the combined response of the mineral and elastomer phases. Unfilled PLA exhibits high modulus and low notched impact. Conventional mineral-filled PLA exhibits higher modulus, lower shrinkage, and higher heat deflection temperature, but remains notch-sensitive. Impact-modified PLA exhibits better toughness but lower modulus and greater creep under load. RTP 2099 X 124790 C is positioned to retain a larger fraction of mineral stiffness while recovering practical ductility for snap-fit assembly and clip features. The grade should not be selected for continuous load-bearing service above 60 °C without annealing; creep testing under ISO 899-1:2017 at the intended service temperature is required.
Linear mold shrinkage measured under ASTM D955-08 or ISO 294-4:2018 is typically lower and more isotropic with mineral filler than with unfilled PLA. Unfilled PLA can exhibit flow-direction shrinkage of 0.2–0.6 % and transverse shrinkage of 0.2–0.4 %; mineral-filled PLA often shows smaller absolute shrinkage. The impact modifier may partially reverse this if the dispersed phase becomes elongated or co-continuous. Mold dimensions should therefore be cut only after 48 h dimensional stability measurements in the intended conditioning atmosphere.
Bio-based claims for RTP 2099 X 124790 C require carbon-14 testing according to ASTM D6866-22 Method B. The method reports the fraction of total organic carbon derived from biomass, not the total mass percentage of renewable material; inorganic mineral fillers are excluded from organic carbon calculations. Regulatory compliance with REACH and RoHS is product-specific. The user must request the supplier’s SVHC declaration and verify that the intended application does not trigger additional obligations under EU 1907/2006 or EU 2015/863. The compound should not be assumed suitable for food-contact or medical use unless a specific FDA 21 CFR or ISO 10993-1 letter is furnished for the lot.
Chemical incompatibilities include prolonged exposure to alkaline solutions above pH 9, which catalyzes hydrolysis of the PLA ester linkages, and storage in contact with amine-based antistatic agents or certain metal salts that can accelerate molecular weight loss. Continuous hot-water service above 60 °C is outside the intended boundary for this product because the PLA matrix undergoes progressive hydrolytic degradation. Tensile retention after immersion should be validated by ISO 62:2008 weight change and residual tensile measurements under ISO 527-2:2012.
Intended application fields are injection-molded nonstructural enclosures, consumer electronics housings, cosmetic packaging, and short-life durable goods where bio-based content and reduced fossil carbon are specified. The mineral reinforcement provides higher stiffness than unfilled PLA, while the impact modifier addresses the brittle failure observed in early PLA compounds. If flame-retardant compliance such as UL 94 V-0 is required, published data for this specific configuration is limited; a separate flame-retardant masterbatch may be necessary, but its addition must not be presumed to maintain the original bio-based carbon content.
| Property | Test method | Condition | Acceptance criterion |
|---|---|---|---|
| Bio-based carbon fraction | ASTM D6866-22 Method B | biomass-derived organic carbon | report lot-specific value |
| Tensile modulus | ISO 527-1:2019 / ISO 527-2:2012 | 1 mm/min | report lot-specific value |
| Flexural modulus | ISO 178:2019 | 2 mm/min | report lot-specific value |
| Notched Izod impact | ASTM D256-23 Method A | 23 °C | report lot-specific value |
| Melt volume-flow rate | ISO 1133-1:2022 | 210 °C, 2.16 kg | report lot-specific value |
| Density | ISO 1183-1:2019 Method A | 23 °C | report lot-specific value |
| Moisture content | ISO 15512:2019 Method B | Karl Fischer oven | ≤0.025 % before processing |
