| HS Code | 518207 |
| Product | Sinopec PP Terpolymer E08EB |
| Type | Polypropylene Terpolymer (Random Copolymer) |
| Melt Flow Rate 230 C 2 16 Kg | 8 g/10min |
| Density | 0.90 g/cm3 |
| Melting Point | 135 °C |
| Tensile Yield Strength | 20 MPa |
| Elongation At Break | 500 % |
| Flexural Modulus | 700 MPa |
| Izod Impact Strength Notched 23 C | 55 kJ/m2 |
| Vicat Softening Point | 115 °C |
| Heat Deflection Temperature 0 45 Mpa | 85 °C |
| Shore D Hardness | 58 |
As an accredited Sinopec PP Terpolymer E08EB factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Available in 25 kg woven bags with inner lining, palletized and shrink-wrapped for safe, convenient handling and transport. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Sinopec PP Terpolymer E08EB: palletized 25kg bags, safely secured, ~25 tons per container. |
| Shipping | Ship as non-hazardous polymer granules in sealed, clean packaging to prevent contamination and moisture ingress. Avoid exposure to direct sunlight, high heat, or ignition sources. Use dry, ventilated containers or vehicles. Handle with appropriate PPE and store in a cool, dry warehouse for safe transit. |
| Storage | For Sinopec PP Terpolymer E08EB, store in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep original packaging sealed to prevent moisture absorption and contamination. Avoid high stacking to maintain pellet integrity. Ground equipment to prevent static buildup. Maintain temperature below 40°C, away from oxidizers. Use within stated shelf life; follow safety regulations. |
| Shelf Life | Shelf life is typically 12 months when stored in a cool, dry, ventilated area away from direct sunlight and moisture. |
On tenter-frame BOPP lines configured with three-layer coextrusion feedblocks, a propylene-ethylene-butene terpolymer grade designated E08EB is introduced into the skin layer to depress seal initiation temperature against laminating or core-layer resins. The supplier technical datasheet lists a nominal melt flow rate of 8.0 g/10 min under ISO 1133-1:2022 at 230°C/2.16 kg; this viscosity position permits skin-layer extrusion at barrel set-points from 230°C to 245°C, but the melt temperature should not exceed 250°C for prolonged residence time because oxidative chain scission reduces seal strength and increases low-molecular-weight extractables. Skin-layer formulations on BOPP tenter lines commonly range from 20 wt% to 45 wt% E08EB, with the balance a propylene-ethylene random copolymer or a clarified random copolymer of higher melting point. Addition below 20 wt% reduces the seal initiation benefit on high-speed flow-wrap lines; addition above 45 wt% can produce interfacial disturbance in the die because the skin melt viscosity diverges from the core melt viscosity by more than 10% at 100 s⁻¹. Downstream orientation applies machine-direction stretch ratios of 3.5:1 to 4.5:1 and transverse-direction stretch ratios of 7:1 to 9:1, with corona treatment after stabilization maintained at 38 mN/m to 42 mN/m to anchor printing and lamination. Seal strength is measured according to ASTM F88/F88M-23 on fin-seal specimens at 120°C to 135°C jaw temperature, 0.5 s dwell, and 0.35 MPa jaw pressure. Food-contact compliance is evaluated under FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011 as amended, with overall migration according to EN 1186-1. Terminal product types include flow-wrap packaging for bakery products, confectionery, dry snacks, and overwrap film for personal care items.
Process instability on L/D 34 co-rotating twin-screw tenter lines has been documented when the skin extruder is run with a reverse temperature profile exceeding 185°C in the first compression zone; unmelted E08EB granules carry into the melt pump, creating die-lip streaks and skin-layer gauge variation greater than ±8%. To avoid this condition, feed-zone temperature is limited to 170°C to 180°C and screw speed is adjusted to maintain stable melt-pump suction pressure. The seal layer is also affected by additive migration: E08EB-based formulations containing erucamide at 800 ppm to 1,500 ppm can exhibit a seal-strength reduction of 0.5 N/15 mm to 1.5 N/15 mm when films are aged for 72 h at 40°C; the slip package is therefore selected from synthetic silica rather than migratory amides when low seal force is unacceptable. Hot-tack performance under ASTM F1921-23 is measured at 200 mm/min peel speed; values below 2.0 N/25 mm after a 0.5 s dwell at 110°C indicate that the sealant-layer ratio or melt-temperature profile must be corrected before HFFS packaging trials. Published data for this specific configuration is limited, so seal strength and additive migration thresholds must be confirmed on the intended line.
In cast film coextrusion, E08EB is incorporated at 40 wt% to 70 wt% in the sealant web, with the balance propylene-ethylene random copolymer or polypropylene homopolymer to control hot-tack and film stiffness. The high melt flow rate of 8.0 g/10 min under ISO 1133-1:2022 reduces melt pressure at the slot die, but also increases draw resonance sensitivity on unsupported cast legs; chill roll temperature is therefore maintained at 18°C to 25°C, and vacuum-box pinning is used rather than air-knife assistance alone. On 3.2 m wide cast lines, edge neck-in of E08EB-containing sealant webs is typically 2 mm to 5 mm per edge when the die gap is set to 0.5 mm and the air gap is 20 mm to 30 mm. The process window for melt temperature is 220°C to 235°C; excursions above 245°C generate gel defects and reduce seal strength through polymer chain scission. Slip and antiblock masterbatch addition ranges from 1 wt% to 3 wt%, with the antiblock selected for low haze in clear food laminations. Seal strength is tested under ASTM F88/F88M-23, and hot tack is tested under ASTM F1921-23. Food-contact compliance follows EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520(c). Terminal product types include 2-ply and 3-ply lamination webs for VFFS and HFFS packaging of fresh produce, pasta, dry soups, biscuits, and industrial goods. A key difference from BOPP is that the cast film has no orientation step, so seal initiation temperature can be reduced without orientation-induced shrinkage; however, film tensile strength is lower and must be compensated by lamination to BOPET or BOPP outer layers.
Extrusion lamination of E08EB onto paper or aluminium foil is performed on single-screw extruders with L/D 28 to L/D 33 at melt temperatures from 290°C to 320°C. The coating formulation is typically 80 wt% to 100 wt% E08EB, with 0 wt% to 20 wt% adhesion-modified polypropylene random copolymer and 2 wt% to 4 wt% slip/antiblock masterbatch. The high melt temperature is required for adhesion to paper and foil, and the molten web is oxidized in the air gap with ozone treatment to increase surface functionality; corona treatment of the substrate is controlled to 40 mN/m before lamination. Nip pressure at the chill roll is set between 0.2 MPa and 0.4 MPa. The resulting laminate is tested for seal strength under ASTM F88/F88M-23 and for food-contact compliance under EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520(c). Terminal product types include dry-food sachet structures, snack laminations, paperboard barrier liners, and industrial membrane packaging. Published data for the specific combination of E08EB with foil primers is limited, so primer selection and peel-strength validation must be performed on the target substrate.
Sterile barrier lidding produced from E08EB-containing cast film is validated according to ISO 11607-1:2019 and EN 868-5 when used as peelable lidding on rigid trays or as pouch material in form-fill-seal medical packaging. The sealant-layer formulation contains 30 wt% to 50 wt% E08EB blended with propylene-ethylene random copolymer and a peel-control masterbatch at 2 wt% to 5 wt%. The peel-additive loading is critical: at the upper range, seal strength may fall below 1.0 N/15 mm, while at the lower range fiber-tearing or destructive seal failure may occur instead of clean peel. Cast film coextrusion runs at 220°C to 235°C melt temperature and chill roll 18°C to 25°C, followed by slitting under cleanroom conditions because particulate contamination affects seal integrity. Lidding machines seal at 135°C to 155°C jaw temperature, 0.5 s to 1.0 s dwell, and 0.3 MPa to 0.5 MPa pressure. Seal strength and dye penetration are tested under ASTM F88/F88M-23 and ASTM F1929-23; biological evaluation of the finished film is conducted according to ISO 10993-5:2009 and ISO 10993-10:2010. Terminal product types include peelable lidding for PP trays, sterile pouch rollstock, and secondary packaging for syringes and catheters. Regulatory documentation for food-grade status alone is insufficient for medical use; the final sterile barrier system must be validated under terminal sterilization conditions.
| Downstream segment | Primary material compliance standard | Seal/performance test method | Typical processing or seal temperature |
|---|---|---|---|
| BOPP tenter-frame skin layer | FDA 21 CFR 177.1520(c); EU Regulation (EU) No 10/2011 | ASTM F88/F88M-23 | Melt 230–245°C; seal jaw 120–135°C |
| Cast film sealant web | FDA 21 CFR 177.1520(c); EU Regulation (EU) No 10/2011 | ASTM F1921-23 | Melt 220–235°C; chill roll 18–25°C |
| Extrusion lamination coating | FDA 21 CFR 177.1520(c); EU Regulation (EU) No 10/2011 | ASTM F88/F88M-23 | Melt 290–320°C; nip 0.2–0.4 MPa |
| Medical sterile barrier | ISO 11607-1:2019; EN 868-5 | ASTM F88/F88M-23; ASTM F1929-23 | Seal jaw 135–155°C |
| Metallized barrier film | EU Regulation (EU) No 10/2011; FDA 21 CFR 177.1520(c) | ASTM D3985-24; ASTM F1249-24 | Metallizer pressure 1×10⁻⁴–5×10⁻⁴ mbar |
| Thermoformed sheet cap layer | EU Regulation (EU) No 10/2011; FDA 21 CFR 177.1520(c) | ASTM F88/F88M-23 | Melt 220–245°C; sheet roll 25–40°C |
Aluminium vacuum metallization of coextruded cast or BOPP films containing E08EB is performed on the substrate surface, while the E08EB-containing layer is maintained as the un-metallized sealant side. The sealant-layer formulation includes 25 wt% to 55 wt% E08EB blended with propylene-ethylene random copolymer and 0 wt% to 10 wt% metallizable homopolymer for stiffness. The substrate layer is corona-treated to 40 mN/m before vacuum deposition; metallizer chamber pressure is controlled at 1×10⁻⁴ mbar to 5×10⁻⁴ mbar and winding tension is reduced by 20% to 30% relative to clear film to avoid cracking the aluminium layer. The barrier performance of the metallized film is measured under ASTM D3985-24 for oxygen transmission and ASTM F1249-24 for water vapor transmission; these barrier values are dominated by metal adhesion and substrate crystallization, not by the sealant layer. Seal strength after lamination is tested under ASTM F88/F88M-23. Food-contact compliance is maintained under EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520(c). Terminal product types include high-barrier snack packaging, coffee pouches, dry beverage sachets, and metallized inner liners for bag-in-box applications. The lower seal initiation temperature of the terpolymer sealant allows high-speed sealing without damaging the metallized surface through excessive jaw temperature.
In coextruded sheet for contact-heating thermoforming, E08EB is incorporated in the sealant cap layer at 60 wt% to 100 wt%, with the balance propylene-ethylene random copolymer and 1 wt% to 3 wt% slip/antiblock masterbatch. Sheet coextrusion runs through a flat die at melt temperatures 220°C to 245°C; the three-roll polishing stack is set from 25°C to 40°C. The formed sheet is then contact-heated in thermoforming machines at 130°C to 150°C surface temperature, with plug assist for deep-draw containers. Seal strength of the cap layer against lidding films is measured under ASTM F88/F88M-23 after tray sealing at 135°C to 155°C. Food-contact compliance is documented under EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520(c). Terminal product types include dairy cups, deli containers, bakery trays, and ready-meal trays requiring low-temperature sealability and clarity. Plate-out on the polishing stack is controlled by limiting slip additive concentration; erratic film appearance on the first 50 kg of sheet after start-up is a known operational condition when the cap layer exceeds 80 wt% E08EB.
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Sinopec PP Terpolymer E08EB is a propylene-ethylene-butene terpolymer supplied as free-flowing pellets for extrusion, cast-film sealing layers, and multilayer packaging webs. The grade designation follows Sinopec polyolefin nomenclature, with the numerical segment commonly associated with a nominal melt mass-flow rate of 8 g/10 min at 230 °C/2.16 kg under ISO 1133-1:2022. As a three-monomer polypropylene, E08EB is distinguished from conventional propylene-ethylene random copolymers by the additional incorporation of 1-butene, which further disrupts crystallinity and shifts the melting peak and seal-initiation range to lower temperatures. The resin remains a rigid polypropylene-based material rather than a tacky plastomer; it is evaluated where lower sealing temperature must be combined with polypropylene clarity, stiffness retention, and printability. Lot-specific certificate-of-analysis data remain the binding source for comonomer content, additive package, density, and mechanical properties.
Random copolymers of propylene and ethylene contain two monomer types and are used where improved optics and lower melting temperature are required compared with homopolymer. Propylene-ethylene-butene terpolymers add 1-butene as a third monomer. The three-monomer sequence disrupts isotactic polypropylene crystallinity more efficiently at equal total comonomer content, shifting the melting peak and seal-initiation temperature downward while limiting the loss of stiffness relative to a high-ethylene random copolymer of similar sealability. For E08EB, the melt flow rate is determined under ISO 1133-1:2022 at 230 °C/2.16 kg; density is determined by ISO 1183-1:2019; melting and crystallization behaviour are characterized under ISO 11357-3:2018; tensile yield stress is measured by ISO 527-2:2012; flexural modulus is measured by ISO 178:2019; and Vicat softening temperature is measured by ISO 306:2013.
| Property | Test standard | PP homopolymer | PP random copolymer | PP terpolymer E08EB class |
|---|---|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 | 2–12 g/10 min | 2–12 g/10 min | 8 g/10 min nominal |
| Density | ISO 1183-1:2019 | 0.900–0.910 g/cm³ | 0.890–0.905 g/cm³ | 0.885–0.900 g/cm³ class |
| Melting peak | ISO 11357-3:2018 | 160–165 °C | 135–150 °C | 125–140 °C class |
| Seal initiation temperature | ASTM F1921/F1921M-21 | >135 °C | 110–130 °C | 85–105 °C class |
| Tensile yield stress | ISO 527-2:2012 | 30–35 MPa | 20–28 MPa | 15–25 MPa class |
| Flexural modulus | ISO 178:2019 | 1300–1700 MPa | 700–1100 MPa | 500–900 MPa class |
| Vicat softening temperature A50 | ISO 306:2013 | 150–155 °C | 130–140 °C | 115–130 °C class |
| Haze, 1 mm plaque | ASTM D1003-21 | 40–60% | 10–25% | 5–15% class |
The E08EB column values are representative of the propylene-ethylene-butene terpolymer class and are not a substitute for lot-specific certificate-of-analysis data. Published data for this specific configuration is limited.
The non-linear response of melting point and seal initiation to total comonomer content means that E08EB should not be specified by melt flow rate and density alone. A lot with identical melt flow rate can show differences in seal-initiation temperature if the ethylene/butene ratio shifts within the manufacturer’s control limits. Converters are therefore advised to request a certificate of analysis that includes melting peak, comonomer distribution proxy, and melt flow rate, and to monitor first-lot processing before qualifying a second-source terpolymer.
For heat-seal and lamination layers, E08EB is evaluated against propylene-ethylene random copolymers by measuring seal-initiation temperature, hot-tack strength, and coefficient of friction after corona treatment. A multilayer cast-film line producing 25–30 µm sealant webs at line speeds above 150 m/min requires a sealant resin with a stable melt curtain, low die build-up, and reproducible additive dispersion. Because the terpolymer has lower crystallinity, seals typically develop destructive strength at lower temperature, but hot-tack and seal-strength values remain highly dependent on sealing pressure, dwell time, seal-bar temperature profile, and film thickness. Seal strength of finished packages is measured under ASTM F88/F88M-21; hot-tack strength is measured under ASTM F1921/F1921M-21. Direct substitution of E08EB into a random-copolymer formulation should be accompanied by a new sealing matrix, starting at 85 °C and increasing in 10 °C increments to 125 °C, at dwell times of 0.2 s, 0.5 s, and 1.0 s, with sealing pressure fixed at 0.5 MPa.
Hot-tack is not an intrinsic resin property; it is a property of the formed seal interface and is sensitive to additive bloom, corona treatment, and seal-bar release timing. Under ASTM F1921/F1921M-21, the specimen is sealed and grip separation is initiated after a defined delay, typically 0.1 s to 0.5 s after seal-bar opening. A lower seal-initiation temperature can widen the hot-tack plateau, but surface contamination from excessive slip additive may suppress hot-tack independently of polymer composition. Consequently, film trials should correlate seal and hot-tack data with the same additive masterbatch lot used in commercial production.
Low seal-initiation temperature becomes the controlling variable when packaging lines operate with seal dwell below 0.5 s or when the packaged product cannot tolerate excessive seal-bar energy input. In form-fill-seal and lidstock applications, the sealant layer is expected to produce destructive seals at the lowest possible temperature while maintaining low blocking and acceptable slip in the supply chain. The presence of 1-butene in E08EB shortens crystallizable isotactic propylene sequences and lowers the temperature at which chain interdiffusion across the seal interface yields load-bearing entanglements. This effect is assessed not from the melting peak alone but from the measured seal-initiation and hot-tack curves. The manufacturer’s published datasheet should be consulted for lot-specific seal data; if such data are absent, a laboratory matrix under ASTM F1921/F1921M-21 and ASTM F88/F88M-21 is required. Published data for E08EB in a specific packaging structure is limited, and generic terpolymer curves cannot be transferred to a finished film without verification.
Migration and organoleptic behaviour in the final film depend on the additive package and conversion conditions. Slip and antiblock masterbatches are added at 2–5 wt% in many cast-film operations, with exact levels set by target coefficient of friction under ISO 8295:1995 and blocking resistance under ASTM D3354-15. Because polypropylene surface energy is low, corona treatment to 38–42 mN/m is normally required before lamination or printing; wetting tension is measured by ASTM D2578-23. Prolonged storage above 30 °C can accelerate slip-additive migration to the surface and produce a coefficient of friction that is not representative of the bulk roll.
For cast film, typical process settings for this product class use melt temperatures of 230 °C to 250 °C, die gap settings of 0.5 mm to 1.0 mm, chill-roll temperatures of 15 °C to 30 °C, and air-gap adjustment to stabilise the melt curtain. These conditions are representative of a 75 mm single-screw extruder with a 30:1 L/D barrier screw and a 400 mm coat-hanger die. Barrel temperature settings should be profiled from 180 °C at the feed throat to 240 °C at the metering section, but actual set points must be tuned to screw speed, back pressure, and melt pressure. High melt temperatures above 280 °C or extended residence time above 10 min increase the risk of oxidative chain scission, gel formation, and discoloration in PP terpolymers. A screen changer with 100–400 µm filtration is common to remove agglomerated additives and incidental contamination.
Post-extrusion corona treatment is normally set to achieve 38–42 mN/m on the film surface; values decay with time and must be rechecked before printing or lamination. Film-to-film friction is controlled by slip and antiblock masterbatches, not by changing base resin. Coefficient of friction is measured according to ISO 8295:1995; blocking is measured under ASTM D3354-15. Because additive migration is temperature- and time-dependent, conditioned film rolls should be tested after 24 h conditioning at 23 °C and 50% RH to avoid false friction values. Batch-to-batch variation is most visible in seal-initiation temperature and coefficient of friction; converters running wide-web cast film lines should track melt pressure variation and seal data by lot. A shift in melt flow rate of ±0.5 g/10 min may require a barrel temperature adjustment of 2–5 °C to maintain melt curtain stability.
Avoid combination with high levels of amine-based antistatic masterbatches or unidentified slip concentrates without supplier confirmation, because nitrogen-containing additives can interact with acidic degradation by-products and shift organoleptic performance. The resin should not be processed with copper-based heat stabilizers or aggressive peroxide masterbatches unless specifically authorised by the supplier; peroxides can initiate chain scission and shift melt flow rate outside the specified window.
Moisture absorption of polypropylene is low, generally below 0.05 wt% at 23 °C and 50% RH. Surface condensation on cold pellets moved into a warm processing hall can create steam bubbles and surface defects in cast film. Pre-drying at 80 °C for 2–4 h in a desiccant dryer with a dew point of -40 °C or lower is required when surface moisture or additive hydrolysis is observed. When ambient relative humidity exceeds 60%, pre-drying is recommended even if the pellet surface appears dry. Indoor storage below 40 °C and away from direct sunlight is sufficient for unopened containers; opened containers should be resealed and consumed within 24 h in humid environments to minimise condensation.
Food-contact suitability is not established by the base polymer alone; it requires a supplier declaration covering monomers, additives, colourants, and conversion residues. The base olefin polymer may fall within FDA 21 CFR 177.1520 when the polymer composition and extraction limits are met. In the European Union, compliance is assessed under Regulation (EU) No 10/2011, with an overall migration limit of 10 mg/dm² for food-contact plastics. In China, food-contact polypropylene surfaces are assessed under GB 4806.7 as applicable. For industrial use, the polymer is exempt from registration as a polymer under REACH (EC) No 1907/2006, but imported articles and monomer substances must comply with the relevant obligations. Packaging placed on the European market must also comply with the heavy-metal limits of Directive 94/62/EC.
| Jurisdiction | Standard or regulation | Scope | Compliance boundary |
|---|---|---|---|
| United States | FDA 21 CFR 177.1520 | Olefin polymers for food contact | Supplier Food Contact Statement and extraction or migration data required |
| European Union | Regulation (EU) No 10/2011 | Plastic materials and articles | Overall migration limit 10 mg/dm²; specific migration of monomers and additives to be verified in worst-case simulants |
| China | GB 4806.7 | Food-contact plastic materials | National conformity and migration testing required |
| Europe | REACH (EC) No 1907/2006 | Chemical safety | Polymer exemption applies; monomer registration and SVHC communication through SDS |
| Europe | Directive 94/62/EC | Packaging and packaging waste | Sum of lead, cadmium, mercury, and hexavalent chromium below 100 mg/kg by weight |
This matrix is a screening checklist, not a legal opinion. The final converter must obtain supplier declarations and verify the specific film structure under applicable national law.
In medical device pouch lamination, an E08EB sealant layer is used where a low sealing temperature and high clarity are required, but the final structure must be validated for the intended sterilization cycle and patient-contact risk. Packaging performance is evaluated under ISO 11607-1:2019 for terminally sterilized medical devices, and cytotoxicity screening of the finished film is conducted under ISO 10993-5:2009. The base resin itself does not confer biocompatibility or sterile-barrier performance; those properties arise from the full lamination, adhesive, and lidstock system.
