Formosa Plastics HDPE TAISOX 8020
- Product Name: Formosa Plastics HDPE TAISOX 8020
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: admin@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Formosa Plastics HDPE TAISOX 8020 is typically used in formulations when melt flow rate and density and melt temperature and injection pressure must be controlled within specific ranges.
| HS Code | 977270 |
| Density | 0.954 g/cm³ |
| Melt Index | 0.20 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 25 MPa |
| Tensile Strength At Break | 30 MPa |
| Elongation At Break | >600 % |
| Flexural Modulus | 1100 MPa |
| Vicat Softening Temperature | 126 °C |
| Heat Deflection Temperature | 75 °C (0.45 MPa) |
| Environmental Stress Crack Resistance | >1000 h |
| Shore D Hardness | 65 |
| Brittleness Temperature | < -70 °C |
| Melt Temperature | 190-210 °C |
| Water Absorption | <0.01 % |
| Dielectric Constant | 2.3 |
| Volume Resistivity | >10^15 ohm·cm |
As an accredited Formosa Plastics HDPE TAISOX 8020 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Formosa Plastics HDPE TAISOX 8020 supplied in 25 kg polyethylene bags, palletized as 1,000 kg per pallet. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): Formosa Plastics HDPE TAISOX 8020, 25 kg bags, palletized, shrink-wrapped, approx. 18–20 MT per 20′ container. |
| Shipping | Formosa Plastics HDPE TAISOX 8020 is shipped as non-hazardous polyethylene pellets in 25 kg bags, 1000 kg bulk bags, or bulk containers. Transport in clean, dry trucks or containers. Store cool, dry, ventilated, away from direct sunlight, moisture, heat, and contamination. No special dangerous goods classification required. |
| Storage | Store Formosa Plastics HDPE TAISOX 8020 in a cool, dry, well-ventilated area, away from direct sunlight, heat, flames, acids, and oxidizing agents. Keep original bags sealed and palletized off the floor to prevent moisture pickup and contamination. Avoid prolonged UV exposure and extreme temperatures. Use first-in, first-out stock rotation. Always consult the SDS for specific recommended handling and storage requirements. |
| Shelf Life | Shelf life typically 12 months when stored in cool, dry conditions in original unopened packaging, protected from sunlight and moisture. |
When a high-flow HDPE injection molding grade carries a nominal melt flow rate of 20 g/10 min under ASTM D1238-23 at 190 °C/2.16 kg and a density of 0.953 g/cm³ under ISO 1183-1, the thin-wall food-packaging route imposes a processing window that is narrower than the general-purpose nameplate suggests. In multi-cavity tools for dairy spreads, frozen dessert tubs, and snap-fit takeaway lids, the grade is processed on reciprocating-screw machines with 20:1–25:1 L/D and compression ratios of 2.2:1–2.6:1; the barrel profile is stepped from 180 °C at the feed throat to 220 °C at the metering zone and 215 °C at the nozzle. If melt temperature exceeds 225 °C, the low-melt-strength tail of a 20 g/10 min HDPE produces visible flash in side-action segments and pin-gate vestiges; if melt temperature falls below 190 °C, the gate freezes before full packing and the part develops sink marks along rim-stiffening ribs. The mold must be held between 10 °C and 20 °C, because surface condensation on chilled cavity steel below 10 °C causes splay marks. Injection velocity is set at 150–250 mm/s with packing pressure of 45–65 MPa for wall stocks of 0.5–0.7 mm, and cooling time is limited to 4–8 s; thicker bosses should not be placed at the intersection of the sidewall and base without a minimum radius of 0.8 mm. The formulation is restrained to a color masterbatch load of 1–3 wt% and a processing aid at 0.5–1.0 wt%; slip and anti-block additives are used at 0.25–0.75 wt% only if the converter has established food-contact compliance under the intended use. For direct food contact, the finished article is assessed to FDA 21 CFR 177.1520 and EU 10/2011, with overall migration tested at 10 mg/dm² or 60 mg/kg depending on container geometry; for export to China, GB 4806.6-2016 applies to the molded olefin article. End-product types in this segment are margarine tubs, frozen dessert cups, scoopable dairy tubs with tamper-evident lids, and thin-wall takeaway containers with clipped lids.
Does a 20 g/10 min Melt Flow Force a Gate-Freeze Conflict in 48-Cavity Closure Molds?
Closure molding with TAISOX 8020 is not pressure-limited but freeze-limited: thread roots of 0.45–0.7 mm, unscrewing-core undercuts, and multi-cavity runner balance shift the rejection mode from sink marks to ovalization when gate geometry is copied from lower-melt-flow HDPE grades. In 48-cavity cold-runner or hot-runner molds, the barrel is set at 200–215 °C in the metering zone and the mold at 15–25 °C; injection velocity is set to 100–180 mm/s for cap diameters of 28–53 mm, with hold pressure 45–65 MPa and cooling time 6–12 s. Gate diameter must be 0.7–1.0 mm for pin gates and not below 0.8 mm for ring gates; smaller gates cause premature freeze before packing and leave sink marks at the thread-core junction. The formulation addition ratio is 1.0–2.0 wt% color masterbatch, 0.5–1.0 wt% slip/anti-block masterbatch, and 0.3–0.8 wt% processing aid; silicone-free mold release is limited to 0.2–0.5 wt% if post-mold printing is performed. For food-contact closures, the finished article is assessed under FDA 21 CFR 177.1520 and EU 10/2011 with migration testing performed on the closed-worst-case product; for non-food detergent and personal-care closures, the relevant mechanical requirement is thread-torque retention and drop damage, often evaluated by ISO 8317:2015 for child-resistant closures where applicable. A limitation of the 20 g/10 min grade is that carbonated-beverage closures should not be specified without extensive pressure-retention and environmental stress crack testing under ASTM D1693-15; the lower molecular weight associated with high flow reduces ESCR relative to blow-molding grades. End-product types are snap-fit overcaps for dry nutrition containers, press-in sports closures for still water, dosing caps for detergent bottles, and flip-top closures for personal-care tubes.
When a 5-L Pail Is Stacked at 40 °C for 28 Days, ESCR Overtakes Top-Load as the Governing Property
Industrial pails in the 5-L to 20-L range carry top loads of 250–400 kg in warehouse stacks, but the failure mode that removes high-flow HDPE from service is not immediate buckling; it is environmental stress cracking at the handle aperture and at the base corner where molded-in stress is highest. For detergent, lubricant, and light-agrochemical pails, compliance with UN 1H2 non-removable-head packaging tests is required only when the fill is a dangerous-goods liquid; the stack test is conducted at 40 °C for 28 days under Chapter 6.1 of the UN Model Regulations, while drop testing is also carried out under the same chapter. Non-hazardous detergent and food-ingredient pails are evaluated by ISO 12048:2016 for compressive and stacking loads. The formulation uses a UV-stabilizer masterbatch at 0.5–1.0 wt%, a pigment or carbon black masterbatch at 1.0–2.5 wt%, and an internal processing aid at 0.5–1.0 wt%; post-consumer regrind is excluded from UN-certified pails, while in-house regrind may be introduced at 20–30 wt% if impact and ESCR are re-verified. Molding is performed on single-face or stack molds with 1.4–2.0 mm wall thickness, melt temperature 200–225 °C, mold temperature 12–25 °C, injection pressure 80–110 MPa, hold pressure 55–75 MPa, and cooling time 18–24 s; gate size at the bucket base must be at least 1.8 mm to avoid jetting. At low-temperature transport below −10 °C, impact strength should be verified by ISO 180/1A on a notched specimen from the molded base, because published data for UN-certified high-MFR pails in this temperature band is design-specific and cannot be transferred without validation. End-product types are detergent pails, lubricant pails, paint pails, agrochemical pails, animal feed buckets, and water-miscible industrial chemical pails.
Batch-to-batch regrind fraction, not polymer melt temperature, is the dominant variable in injection-molded distribution crates and logistics trays made from TAISOX 8020. These products are produced with wall thicknesses of 2.5–4.0 mm, yet the high flow rate of 20 g/10 min is used to avoid short shots in long-flow ribbed sidewalls and to allow fast cycle times on 600–1200 t clamping units. The mold is run at 200–230 °C melt temperature, 15–30 °C mold temperature, injection pressure 70–100 MPa, hold pressure 60–80 MPa, and cooling time 30–60 s; gate diameter is set at 1.5–2.5 mm for wall stock above 2.5 mm to reduce jetting and weld-line weakness. The formulation includes in-house regrind at 25–40 wt%, a UV masterbatch at 0.5–1.5 wt%, and a color masterbatch at 0.5–2.0 wt%; if the crates carry loose primary produce, food-contact compliance is assessed under EU 10/2011 and FDA 21 CFR 177.1520 for repeated contact, with specific attention to overall migration into aqueous and acidic simulants. For dry logistics use, the governing structural standard is ISO 12048:2016 for static compression and stacking; for automotive returnable trays, specific dimensional tolerances are checked against the current VDA packaging interface specification rather than by a single ISO standard. The production process uses a hot-runner system with valve gates only where stack ribs create dead spots; otherwise cold sprue drops are preferred to reduce color-change downtime. Knit lines at the intersection of base ribs and sidewall louver openings must be moved away from the corners by at least 20 mm or the part will crack in return transport under vibration. End-product types include nestable distribution totes, collapsible logistics boxes, automotive component trays, agricultural harvest bins, and retail display crates.
Deep-Draw Household Storage with Recurrent Dishwasher Exposure and Dry-Food Contact
Household storage products molded from TAISOX 8020 are typically deep-draw boxes and bins with wall thicknesses between 0.8 mm and 1.5 mm, where long vertical sidewalls require a balance between fast filling and demolding without scoring. The processing route uses single-stage injection molding with barrel temperatures of 190–220 °C, mold temperatures of 15–30 °C, injection velocity of 120–200 mm/s, and hold pressure of 50–70 MPa; cycle times in this segment are heavily influenced by part depth rather than material solidification because the high-flow grade fills thin front faces quickly but deep cores require additional cooling near the base. Formulation addition ratios are 1–3 wt% color masterbatch, 0.5–1.0 wt% anti-static masterbatch for dry goods, and 0.5–1.0 wt% UV masterbatch only for products intended for outdoor use; slip is kept below 0.5 wt% where the article is dry-food contact because excessive slip can raise extractables. Direct food contact is qualified under FDA 21 CFR 177.1520 and EU 10/2011, with the converter responsible for verifying that the masterbatch carrier is included in the overall migration assessment. Recurrent dishwasher exposure is not governed by a universal ISO standard for the molded HDPE grade itself, but deformation should be verified at 65 °C water temperature because the heat deflection temperature of the grade under ASTM D648 is approximately 70–75 °C; prolonged contact with heating elements in domestic dishwashers will distort the article. End-product types include stackable storage boxes, under-bed bins, desk organizers, dry pet food bins, and closet drawer inserts.
A sharps-container sidewall must resist puncture after the part is filled with irregular needle clusters under clinical disposal conditions; the governing failure mode is not environmental stress cracking but localized film thinning in deep-draw corners. For clinical sharps disposal containers and laboratory waste vessels, TAISOX 8020 is processed at 190–215 °C melt temperature, 10–25 °C mold temperature, injection pressure 90–120 MPa, hold pressure 50–70 MPa, and cooling time 20–40 s depending on wall thickness of 1.2–2.0 mm; the fill speed is reduced to 80–140 mm/s relative to thin-wall food packaging because high shear at the gate can cause sidewall orientation that reduces puncture resistance. The formulation uses an opacifying masterbatch at 1–3 wt% and a color masterbatch at 0.5–1.5 wt%; post-consumer regrind is excluded, and in-house regrind is limited to 10–20 wt% after confirming no contamination from biological waste. The product is tested for puncture resistance under ASTM F2132-19 and for the finished sharps container under ISO 23907-1:2019; where the container is supplied as a medical-device accessory, the molding activity is controlled under ISO 13485:2016 with lot traceability of resin and masterbatch. A critical processing limitation is that HDPE 8020 is not suitable for repeated steam autoclave exposures at 121 °C because the heat deflection temperature under ASTM D648 is far below autoclave conditions; if the container is to be autoclaved before disposal, a higher-temperature polyolefin such as PP or a reduced-temperature cycle must be validated. End-product types include bench-top sharps containers, laboratory waste bins, contaminated glass disposal vessels, and clinical transport bins with lockable lids.
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- Formosa Plastics HDPE TAISOX 8020 is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: admin@ascent-chem.com.
Formosa Plastics HDPE TAISOX 8020 is positioned within the high-density polyethylene injection moulding segment of the TAISOX olefin portfolio. The 8020 designation corresponds to a high-flow class in which nominal melt flow rate is reported in the region of 20 g/10 min at 190°C under 2.16 kg load in accordance with ISO 1133-1:2022 or ASTM D1238-20. A nominal density in the 0.953 g/cm³ range is typical for this melt-flow class when measured by ISO 1183-1:2019 or ASTM D1505-18. The grade is used in thin-wall rigid packaging, caps, closures, and multi-cavity housewares requiring short fill times, low injection pressure, and consistent demoulding. Because lot-specific certified values may vary, the manufacturer’s certificate of analysis should be consulted before mould-flow simulation or tool design; published data for this specific configuration is limited beyond class-level values.
Processing Window and Melt Rheology in High-Speed Injection Moulding
Melt temperature control for TAISOX 8020 in high-speed injection moulding is normally maintained between 180°C and 230°C as measured at the nozzle. Higher melt temperatures reduce viscosity and improve thin-wall reproduction but increase cooling time and may initiate oxidative chain scission above 240°C. Mould temperature is held at 10°C to 40°C for packaging applications; settings up to 60°C can improve surface gloss but extend cycle time. The grade should be processed on reciprocating screw machines with an L/D ratio of 20:1 to 25:1 and a compression ratio of 2.5:1 to 3.0:1. Shot size is typically controlled between 30% and 70% of barrel capacity to limit residence time. Peak injection pressure for thin-wall sections is normally in the range of 70–120 MPa, with measured cavity pressure at 30–60 MPa before gate freeze. A screw cushion of 3–6 mm is maintained to ensure stable packing pressure. The principal process conflict is that high melt flow reduces injection pressure but increases the risk of flash, gate blush, and mould breathing if clamp force is insufficient. On packaging lines with projected-area clamp requirements of 4–6 kN/cm², tie-bar strain should be monitored to keep mould deflection below 0.05 mm; otherwise cavity pressure sensors can show early loss of packing pressure in the outermost cavities. Non-return ring wear in production-scale equipment is a batch-to-batch variability risk because backflow increases shot-weight variation and deteriorates consistency in ASTM D638-14 tensile bars. The recommended melt residence time at maximum temperature should not exceed 10 min; longer residence times cause yellowing and loss of impact properties.
In multi-cavity hot-runner tools with more than 16 cavities, manifold temperature uniformity and valve-gate timing are the controlling variables for weight variation. A hot-runner setpoint deviation of ±3°C across zones can produce cavity-to-cavity fill imbalance, particularly when flow length to wall thickness ratios exceed 100:1. Production trials on high-flow HDPE have shown that geometrically balanced valve-gated systems can achieve cavity weight coefficient of variation below 0.5% when the screw recovery time is shorter than the cooling time and when the melt cushion is held within 3–6 mm. Short-shot progression studies at 15–20% and 50–60% of final part weight should be used to verify flow-front advancement before determining final pack pressure. In thin-wall caps and closures, fast injection velocity with a fill time from 0.1 s to 0.4 s is typical; slower fill causes premature freeze-off and short shots, while excessive velocity increases shear heating and may cause jetting or gate blush. Weld-line strength in multi-gate applications should not be assumed equal to the bulk resin value; tensile retention measured on ASTM D638-14 specimens may decrease to 70–85% of the fully fused value. Hot-runner systems with thermal gate tips require lower mould temperature differentials than cold sprue systems; otherwise premature gate freeze produces sink marks opposite the gate. Ejection force can rise when mould temperature is below 10°C because differential shrinkage increases friction on core pins; mould release agents may reduce demoulding force but can also lower adhesion for printing or lamination.
What Separates TAISOX 8020 from Lower Melt Flow HDPE Grades?
The primary difference is melt viscosity. Lower melt flow HDPE grades in the 0.5–1.0 g/10 min class have higher molecular weight, greater melt strength, and higher notched Izod impact values, but require longer fill and higher pack pressure in thin-wall injection tools. TAISOX 8020, by contrast, moves into thin sections at lower injection pressure and shorter cycle time but sacrifices some impact resistance and environmental stress crack resistance. When compared with blow moulding HDPE grades having melt flow rates of 0.3–0.7 g/10 min, the 8020 class is not suitable for continuous extrusion blow moulding because insufficient parison melt strength causes drawdown and non-uniform wall thickness. Compared with high-density injection grades below 5 g/10 min, TAISOX 8020 reduces peak injection pressure but increases the probability of flash, gate blush, and short-shot-pressure sensitivity if the clamp force is not matched to the projected area. Tensile yield strength measured by ASTM D638-14 may be 2–4 MPa lower in high-flow HDPE due to reduced molecular weight, while flexural modulus measured by ASTM D790-17 remains broadly similar to lower-flow injection grades. Notched Izod impact at 23°C tested by ASTM D256-10e1 is generally 30–40 J/m for the 8020 melt-flow class, compared with 150–250 J/m for a 0.5–1.0 g/10 min grade. These trade-offs drive material selection: thin-wall packaging with short cooling time favours high flow, while heavy-wall industrial containers and large pallets generally require lower melt flow resin to maintain impact and environmental stress crack resistance.
When Dimensional Stability and Shrinkage Control Fall Below 2%
If the part drawing requires flatness or roundness within 1.5–2.0% of nominal dimension, solidification kinetics of HDPE control in-mould shrinkage. In comparable high-flow HDPE grades, mould shrinkage measured along the flow direction by ASTM D955-08 may range from 1.5% to 3.0%, while transverse shrinkage may be 1.0% to 2.5%. Published data for TAISOX 8020 in this specific configuration is limited; therefore cavity dimensions should be validated with steel-safe tooling and iterative shrinkage measurement. Packing pressure is the dominant parameter: increasing pack pressure from 40 MPa to 80 MPa can reduce linear shrinkage by 0.3–0.8 percentage points, but the higher cavity force may exceed clamp capacity and cause mould breathing. Gate geometry also changes shrinkage anisotropy. Pinpoint or submarine gates freeze quickly and create higher local packing loss; direct edge gates maintain pack pressure longer and produce lower shrinkage near the gate. Mould temperature differentials above 20°C between moving and fixed halves can cause differential solidification and warpage. For dimensions with tolerances below ±0.5%, post-mould fixtures and controlled ambient cooling at 23°C and 50% relative humidity are required to stabilise crystallisation and dimensional relaxation. Process validation should include capability analysis across multiple lots and at least 30 shots per cavity after machine stabilisation. High-speed injection with short hold time can produce anisotropic crystallinity distribution that is not detectable by density alone but appears as warpage after temperature cycling between -20°C and 60°C.
Food-contact suitability must be verified for the exact formulation and conversion conditions. TAISOX 8020 may be evaluated for compliance with the olefin polymer specifications of FDA 21 CFR 177.1520 when used under conditions A through H appropriate to food type and temperature. Under EU Regulation 10/2011, overall migration from the finished article must not exceed 10 mg/dm² using food simulants assigned by Annex III; specific migration limits for any additives are declared in the Union list. The grade must also be checked against material-specific restrictions under the latest consolidated version of the regulation. REACH compliance under Regulation EC 1907/2006 requires confirmation that no substances of very high concern are intentionally added at concentration above 0.1% w/w. RoHS compliance under Directive 2011/65/EU requires lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE to remain below the maximum concentration values; this is typically confirmed by X-ray fluorescence screening and subsequent wet chemical analysis. It is not appropriate to assume compliance for every shipment; batch or grade-specific statements should be obtained from the resin manufacturer.
| Property | Test method | TAISOX 8020 class | Lower-flow HDPE injection class |
|---|---|---|---|
| Melt flow rate | ISO 1133-1:2022 / ASTM D1238-20 | 20 g/10 min nominal class | 0.5–1.0 g/10 min |
| Density | ISO 1183-1:2019 / ASTM D1505-18 | 0.953 g/cm³ class | 0.956–0.960 g/cm³ |
| Tensile yield strength | ASTM D638-14 | 23–26 MPa class | 26–28 MPa |
| Flexural modulus | ASTM D790-17 | 950–1100 MPa | 1100–1300 MPa |
| Notched Izod impact at 23°C | ASTM D256-10e1 | 30–40 J/m | 150–250 J/m |
| Vicat softening point | ASTM D1525-17e1 | 122–126°C | 124–128°C |
TAISOX 8020 is supplied as pellets and does not normally require drying unless storage relative humidity exceeds 60%. If moisture is present, drying at 80°C for 2 h in a dehumidifying hopper dryer prevents surface splay and screw output fluctuation. Regrind addition should be kept below 20–30% by weight to limit reduction in notched Izod impact and to avoid accumulation of fines around the feed throat. Bulk density of high-flow HDPE pellets is typically 0.54–0.58 g/cm³; conveying lines should be sized to avoid pellet fracture and angle-of-repose-related bridging in silos. Additive masterbatch compatibility should be confirmed with the base stabilisation package to prevent early discolouration or plate-out on mould surfaces. For applications requiring notched Izod impact above 100 J/m, a lower melt flow HDPE or medium-density polyethylene should be evaluated.
| Regulatory framework | Relevant clause or method | Condition applied to TAISOX 8020 |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers, conditions A–H | Formulation and end-use temperature must be verified |
| EU Regulation 10/2011 | Overall migration 10 mg/dm²; Annex III simulants | Finished article testing required |
| REACH 1907/2006 | 0.1% w/w SVHC threshold | No intentional SVHC |
| RoHS 2011/65/EU | Pb, Hg, Cd, Cr6+, PBB, PBDE | Maximum concentration values apply |
Environmental Stress Crack Resistance Testing Uses Notched Constant-Strain Data
The ESCR of high-flow HDPE is substantially lower than that of lower melt flow HDPE. In notched constant-strain testing following ASTM D1693-15, comparable high-flow HDPE grades may show F50 failure below 10 h under 100% Igepal CO-630 at 50°C, while lower-flow injection grades and bimodal HDPE grades may exceed 100 h. Published data for TAISOX 8020 in this specific configuration is limited; field performance should be confirmed on finished articles with the actual stress-cracking fluid. ESCR is not controlled solely by density; comonomer type and molecular weight distribution affect the tie-molecule population. High-flow injection grades with a narrow molecular weight distribution have fewer load-bearing tie chains, which reduces resistance to slow crack growth. Therefore TAISOX 8020-type materials are generally not selected for detergent bottles, agricultural chemical containers, or pressurised pipe where notched constant-strain testing is a release criterion. For caps and closures in contact with surfactants, the part should be designed with low residual stress, uniform wall thickness, and no sharp notches at gate vestiges. Mould cooling uniformity is critical because differential cooling creates tensile residual stresses at the surface; these stresses can initiate environmental stress cracking even when the bulk material has passed a moulded plaque test. Incompatibility with strong oxidizing acids, aromatic hydrocarbons, and some surfactant formulations should be assumed; end-use compatibility testing under ISO 175:2010 and ASTM D543-21 is required.
