| HS Code | 100154 |
| Melt Flow Rate 230 C 2 16 Kg | 10 g/10min |
| Density | 0.91 g/cm³ |
| Tensile Strength At Yield | 24 MPa |
| Elongation At Break | 350 % |
| Flexural Modulus | 850 MPa |
| Izod Impact Strength Notched 23 C | 8 kJ/m² |
| Rockwell Hardness | R 80 |
| Heat Deflection Temperature 0 45 Mpa | 85 °C |
| Vicat Softening Point 10 N | 120 °C |
| Melting Temperature | 140 °C |
| Mold Shrinkage | 1.2 % |
| Haze | 20 % |
As an accredited SEETEC™ PP Terpolymer T3410 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SEETEC™ PP Terpolymer T3410 is supplied in 25 kg multi-walled paper bags, palletized and wrapped for safe transport. |
| Container Loading (20′ FCL) | SEETEC™ PP Terpolymer T3410 is shipped as a 20′ FCL, packed in 25 kg bags on pallets, safely secured for transport. |
| Shipping | SEETEC™ PP Terpolymer T3410 is shipped as solid resin pellets in sealed multi-wall bags or bulk hoppers. Store in a cool, dry, well-ventilated area away from heat, ignition sources, and sunlight. Avoid dust accumulation; use proper grounding during transfer. Not classified as dangerous goods under normal transport conditions. |
| Storage | Store SEETEC™ PP Terpolymer T3410 in a cool, dry, well-ventilated area, away from direct sunlight, heat, moisture, and ignition sources. Keep containers tightly sealed to prevent contamination and static buildup. Avoid prolonged storage under high temperatures. Rotate stock to maintain first-in, first-out usage and preserve material properties. |
| Shelf Life | Shelf life is typically 2 years from manufacture when stored in a cool, dry place away from direct sunlight. |
SEETEC™ PP Terpolymer T3410 is a propylene-ethylene-butene-1 random terpolymer with a nominal melt flow rate of 5.5 g/10 min when measured at 230 °C/2.16 kg according to ISO 1133-1:2022 and a nominal density of 0.90 g/cm³ according to ISO 1183-1:2019. The butene-1 comonomer depresses the peak melting endotherm to approximately 132 °C under ISO 11357-3, which translates directly to a heat-seal initiation range of 112–116 °C in cast film. In coextruded cast polypropylene heat-seal webs, the grade is placed as the contact sealing skin at 8–15 µm thickness over a homopolymer PP core, with the skin layer comprising 15–25% of total web gauge. Production lines for this structure typically use a three-layer cast unit with screw diameters of 65 mm, 90 mm, and 65 mm and 30:1 length-to-diameter ratios on all extruders. The T3410 extruder barrel zones are ramped from 180 °C at the feed throat to 235 °C at the adapter, while the feedblock and flat die are held at 235–245 °C. The chill-roll set point is maintained at 18–22 °C; sustained operation above 28 °C without raising antiblock concentration above 0.10 wt% active silica typically produces blocking at the winder and intermittent web breaks above 150 m/min. Heat-seal force is tested according to ASTM F88/F88M at a jaw pressure of 0.275 MPa and dwell times from 0.5 s to 1.0 s, and hot-tack force is tested according to ASTM F1921. The seal response positions the structure for vertical and horizontal form-fill-seal machines operating above 120 cycles/min. The food-contact skin is formulated under FDA 21 CFR 177.1520 for olefin polymers and must meet the overall migration limit of 10 mg/dm² under EU Regulation 10/2011. Terminal products include printed snack laminates, confectionery wrappers, and fresh-cut produce pouches sealed on rotary jaw lines.
In biaxially oriented polypropylene production, T3410 is coextruded as the outer sealing skin on three-layer or five-layer tenter-frame lines. The melt is fed through a flat die held at 240–250 °C and cast onto a quench roll at 20–25 °C. After orientation, the sealant skin is typically 1.0–3.0 µm, representing 3–8% of total web thickness. Machine-direction stretching is performed at preheat roll temperatures of 120–135 °C and a draw ratio of 4.5–5.2:1; transverse stretching follows in a tenter oven at 150–158 °C with a TD draw ratio of 7.5–9.0:1. A process conflict appears at the MDO preheat section because the T3410 skin begins to soften below 115 °C; if the first preheat roll exceeds 135 °C or accumulates low-molecular-weight residues, the web sticks, wraps, and tears. Converter lines therefore set the first MDO preheat roll at least 10 °C below the homopolymer core setting and often specify fluoropolymer-coated rolls to reduce deposit build-up. Seal strength after orientation is measured according to ASTM F88/F88M using a 25.4 mm strip and 300 mm/min jaw speed; hot-tack response is measured according to ASTM F1921 from 90 °C to 140 °C. Because the oriented skin is thin, slip and antiblock masterbatch addition must be limited to 0.05–0.08 wt% to prevent seal-force reduction below 200 g/25 mm on high-speed packaging lines. The sealant skin must comply with EU 10/2011 and FDA 21 CFR 177.1520 when used in food-contact overwrap. Terminal applications include cigarette-pack overwrap, optical disc cartons, cosmetic boxes, and flower wrap. Published data for T3410 on specific BOPP tenter installations is limited, but the processing window is consistent with terpolymer sealant grades of 5.5 g/10 min melt flow rate.
T3410 is run as an extrusion coating layer in flexible packaging laminates where a polypropylene-based sealant is required on aluminium foil or reverse-printed BOPP. The coating line typically uses a 120 mm single-screw extruder with an L/D of 30:1, a melt pump, and a coat-hanger die with internal deckles set to 1.2–1.5 m web width. Melt temperature at the die is controlled at 285–300 °C; below 280 °C the terpolymer viscosity increases and edge neck-in becomes difficult to manage, while above 310 °C oxidative chain scission of butene-1 segments generates oxidized gel particles at the die lip. The air gap is held at 120–180 mm, and coating weight is controlled from 12 g/m² to 25 g/m². Adhesion to aluminium foil is not obtained through a polyethylene-based primer because T3410 contains no acid functionality; instead, the foil is corona-treated or flame-treated to 38–42 mN/m wettability and a maleated polypropylene tie layer is applied at 3–5 g/m². The polished chill roll is set at 10–15 °C with surface roughness below 0.2 µm Ra to prevent chill-roll release odour. The coated foil is subsequently laminated to printed BOPP or PET with a solvent-free polyurethane adhesive at 1.8–2.5 g/m². Terminal structures include dry-food pouches, lidding films, and single-serve snack laminates. The melt flow rate of 5.5 g/10 min places T3410 at the low-MFR end for extrusion coating; converters running webs wider than 1.5 m often select higher-MFR terpolymer grades because edge neck-in on T3410 can exceed 25 mm per side above 300 °C. Food-contact compliance is maintained under EU 10/2011 and FDA 21 CFR 177.1520.
Air-cooled blown film lines process T3410 as one contact layer of a three-layer coextruded bubble at 5–12 µm thickness. The die is typically a 200 mm three-layer spiral mandrel unit with a die gap of 1.8 mm; melt temperature is held at 190–210 °C to avoid thermal degradation while retaining bubble stability. Blow-up ratio is kept between 2.0:1 and 2.5:1; below 2.0:1 transverse shrink orientation is insufficient for collation bundling, and above 2.5:1 the terpolymer melt strength is too low to prevent bubble flutter and gauge variation. The frost line is maintained at 6–8 die diameters above the die through external air-ring control. Output on a 200 mm line is generally limited to 120–160 kg/h; internal bubble cooling is required at higher outputs because the low crystallinity of T3410 increases residence time and reduces melt pressure. Collation shrink film for beverage multipacks is produced by blending 70–80 wt% T3410 with 20–30 wt% LDPE or butene-1 LLDPE; the modifier lowers seal initiation and improves hot tack on high-speed bundlers, but shrink temperature remains below 115 °C because higher temperatures damage printed bottle labels through excessive shrink force. Shrinkage is measured according to ASTM D2732 using a 100 °C water bath or 120 °C hot air; typical free shrink is 8–12% in the machine direction and 10–14% in the transverse direction. The blown film process is more sensitive to ambient humidity than cast film; when the production hall exceeds 70% RH, condensation on chilled nip rolls produces water-tracking defects unless nip rolls are heated to 30–35 °C. Finished film is used for collation shrink bundling of bottles, cans, and cartons and must meet EU 94/62/EC heavy-metal limits when coloured masterbatch is present.
A second cast-film configuration uses T3410 as the metal-receiving skin on coextruded CPP destined for vacuum metallization. The skin is held at 5–10 µm and the core is a homopolymer or mineral-filled PP at 25–30 µm. Before metallization, the film is corona-treated to 38–42 mN/m and then coated with aluminium in a vacuum chamber at an optical density of 2.0–2.5, corresponding to oxygen transmission below 1.0 cm³/(m²·24 h·atm) when measured according to ASTM D3985 after lamination. The low seal initiation temperature allows the metallized web to seal on pillow-pack machines at jaw settings of 110–120 °C. However, treatment level must not exceed 44 mN/m, because oxidative surface degradation generates low-molecular-weight species that reduce metal adhesion after 48 h of accelerated aging at 40 °C/90% RH. Terminal uses include high-barrier snack wrappers and inner liners for dry foods. Published peel strength data for this specific T3410 configuration is limited, so converters run qualification trials according to ASTM D1876 for metal adhesion. The compliance matrix below applies to the film structures described above.
| Standard or specification | Scope | Control or limit |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers in food-contact articles | Finished article must meet extractive limits; additives must be cleared for food contact |
| EU Regulation 10/2011 | Plastic materials and articles intended for food contact | Overall migration limit of 10 mg/dm²; specific migration limits for additives apply |
| EU 94/62/EC | Packaging and packaging waste | Sum of lead, cadmium, mercury, and hexavalent chromium below 100 mg/kg by weight |
| ISO 1133-1:2022 | Melt mass-flow rate of thermoplastics | Nominal value 5.5 g/10 min at 230 °C/2.16 kg |
| ASTM D1003 | Haze and luminous transmittance of transparent plastics | Converter internal limit for clear sealant skins typically below 3.0% |
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SEETEC™ PP Terpolymer T3410 is a pelletized propylene-ethylene-1-butene terpolymer produced by LG Chem Ltd. for thin-gauge coextruded film sealing layers. The grade belongs to the SEETEC polypropylene family but is differentiated from binary propylene-ethylene random copolymers by the inclusion of 1-butene. Manufacturer-published typical values list the melt flow rate as 5.0 g/10 min at 230 °C/2.16 kg per ASTM D1238-20, density as 0.90 g/cm³ per ASTM D1505, tensile yield stress as 23.0 MPa per ASTM D638-14, elongation at break above 500% per ASTM D638-14, flexural modulus as 0.80 GPa per ASTM D790-17, and Vicat softening temperature as 118 °C per ASTM D1525. The melting peak is reported in the 130 °C to 132 °C band by differential scanning calorimetry at 10 °C/min under ISO 11357-3. Because polyolefin comonomer distribution is batch-dependent, the values are not contractual specification limits; a certificate of analysis should be used for production release.
| Property | Test Method | Typical Value |
|---|---|---|
| Melt flow rate | ASTM D1238-20 | 5.0 g/10 min |
| Density | ASTM D1505 | 0.90 g/cm³ |
| Tensile yield stress | ASTM D638-14 | 23.0 MPa |
| Elongation at break | ASTM D638-14 | >500% |
| Flexural modulus | ASTM D790-17 | 0.80 GPa |
| Vicat softening temperature | ASTM D1525 | 118 °C |
| Melting peak | ISO 11357-3 | 130 °C to 132 °C |
| Haze on 50 μm cast film | ASTM D1003-13 | 2.5% |
| Gloss at 45° | ASTM D2457 | 90 GU |
The same melt-flow measurement is cross-checked in ISO-compliant laboratories under ISO 1133-1:2022 at 230 °C/2.16 kg. The product is not a reactor thermoplastic elastomer; its crystallinity is lower than a polypropylene homopolymer but it remains a semi-crystalline polyolefin without an elastomeric dispersed phase.
Primary commercial placement is as a skin layer in three-layer cast polypropylene, blown polypropylene film, and biaxially oriented polypropylene structures. The intended function is heat-sealable packaging for consumer overwrap and form-fill-seal applications. In cast polypropylene constructions, the T3410 sealant layer is typically maintained at 5 μm to 15 μm after extrusion; in biaxially oriented polypropylene, stretching reduces the sealant thickness to 1 μm to 3 μm. The material is not intended as a monolayer load-bearing film because its flexural modulus is approximately 45% lower than a conventional polypropylene homopolymer, which reduces stiffness, deadfold, and printable web stability.
The difference arises from the additional 1-butene comonomer and its influence on crystallizable sequence length. In propylene-ethylene random copolymers, the ethylene defects are partially incorporated into the polypropylene lattice and lower the melting point; however, the reduction is insufficient for very low-temperature packaging lines. In T3410, 1-butene units disrupt lamellar thickening further because the ethyl branch is rejected from the propylene crystal and resides primarily in the amorphous phase. The result is a depressed melting endotherm and a lower seal initiation temperature at equivalent comonomer mass fraction.
During sealing, the jaw raises the sealant interface above the melting peak. T3410 produces a melt that can interdiffuse across the seal interface at lower temperature than a random copolymer of equivalent melt flow rate. The cooling step then recrystallizes the interphase; seal strength under ASTM F88/F88M-21 depends on the degree of chain entanglement formed before crystallization quenches molecular motion. Jaw pressure must be controlled to avoid melt squeeze-out because the low-modulus terpolymer melt has greater flowability at seal temperature than a homopolymer skin. Laboratory seal samples are typically conditioned at 23 °C and 50% relative humidity for 24 h before testing.
Heat-seal performance of T3410 is commonly characterized under ASTM F88/F88M-21 as a function of jaw temperature, dwell time, and pressure. Reported converter evaluations on 30 μm cast film define seal initiation at a seal strength of 4.4 N/25 mm; T3410 reaches this threshold from 108 °C to 115 °C using a 0.5 s dwell and 0.14 MPa jaw pressure. A binary random copolymer of equivalent melt flow rate typically requires 122 °C to 130 °C under the same conditions. Published data for this specific configuration is limited, so these ranges are material-class observations rather than guaranteed product limits.
Hot-tack testing by ASTM F1921 on the same film shows handling strength above 1.5 N/25 mm begins near 115 °C to 120 °C. This behavior is relevant for vertical form-fill-seal machines operating at 40 to 80 cycles/min, where the seal must resist springback forces from the packaged product before cooling. Compared with high-ethylene EVA sealants, T3410 has a narrower low-temperature sealing band but avoids acetic acid odor, equipment corrosion concerns, and film-blocking tendencies. Compared with propylene homopolymer, T3410 has inferior stiffness and is not used as a machine-direction-oriented core.
On cast film lines using single-screw extruders with 30:1 to 36:1 L/D and barrier-mixing screw geometry, a barrel profile from 180 °C feed to 240 °C metering is typical. Adapter and feedblock temperatures are set at 240 °C to 250 °C, and die temperature is held in the same range. Melt temperature above 260 °C should be avoided because terpolymer oxidative chain scission accelerates and die-lip deposits appear as film gels. Throughput limits are equipment-dependent; screw speed should not be reduced below 20% of maximum for prolonged periods because residence time then increases nonlinearly. Chill roll temperature setpoints of 18 °C to 30 °C give adequate clarity on polished rolls, and the frost line in blown film should be controlled by air-ring adjustment rather than by melt temperature increases.
For biaxially oriented polypropylene tandem lines, the cast sheet is quenched, reheated, and stretched in the machine direction at ratios between 4.5:1 and 5.5:1. Transverse orientation in the tenter is carried out at 155 °C to 165 °C. Because the terpolymer sealant skin is less crystalline than homopolymer core layers, tenter setpoints should be lowered by 5 °C to 10 °C compared with homopolymer-only webs to minimize transverse thinning and stress-whitening. Corona treatment, when required, is applied after orientation; surface tension of treated film should be verified before lamination because polypropylene surfaces decay toward 34 mN/m to 36 mN/m over storage.
Degraded solids and gels are the main production failure mode when T3410 is run above 260 °C or when the melt residence time is extended by frequent line stoppages. Polypropylene oxidative degradation proceeds through chain scission and, under oxygen-starved conditions, can also involve crosslinking; the resulting gel particles translate into fish-eye defects in thin sealant layers. On a three-layer cast line, gel streaks in the sealant skin often originate from stagnant melt in the feedblock combination section and from edge-bead recirculation. To reduce the defect frequency, production lines typically purge with a low-viscosity LDPE at 200 °C to 220 °C after the melt temperature alarm is cleared; the purge must continue until the melt stream is free of visible particulate. The use of high-viscosity polypropylene for purging is not recommended because it increases residence time and can delay contaminant removal.
Edge trim from cast film can be reintroduced into the sealant layer at levels up to 20 wt%. Higher rework levels reduce seal strength, increase haze, and can broaden the seal initiation window. If pellets have been stored in humid conditions, condensation on pellet surfaces can cause bridge feeding in the hopper; pre-drying is not normally required for sorption reasons, but a 1 h to 2 h ambient-air purge or desiccant hopper at 60 °C may restore flow.
Regulatory positioning of T3410 must be treated as an end-use function rather than a resin-intrinsic property. For food-contact packaging in the United States, the converter should review 21 CFR 177.1520 for olefin polymer use, with migration testing performed under the intended temperature, simulant, and surface-to-volume ratio. For European Union applications, Commission Regulation (EU) No 10/2011 sets an overall migration limit of 10 mg/dm² for plastic materials, and specific migration of 1-butene and ethylene should be checked if the monomer is detected in migration screening. In food-contact films, the lower crystallinity and higher amorphous fraction of T3410 can increase the diffusion coefficient of intentionally added slip agents and processing aids compared with homopolymer layers. RoHS compliance for electrical and electronic packaging is generally supported by raw-material certificates for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs under RoHS 2011/65/EU and its delegated directives; REACH SVHC screening should be confirmed with the current supplier declaration. T3410 is not positioned for medical device or pharmaceutical primary packaging where ISO 10993 biocompatibility testing is mandatory unless the converter independently validates the final device.
The table below contrasts T3410 with representative material-class values for a propylene-ethylene random copolymer and a propylene homopolymer. The comparator values are not grade-specific specifications but indicate why layer substitution decisions require revalidation of seal temperature, stiffness, and optics.
| Attribute | T3410 Terpolymer | Binary Random Copolymer | Propylene Homopolymer |
|---|---|---|---|
| Comonomer set | Ethylene + 1-butene | Ethylene | None |
| Melting peak | 130 °C to 132 °C | 140 °C to 146 °C | 160 °C to 165 °C |
| Seal initiation range | 108 °C to 115 °C | 122 °C to 130 °C | Not recommended for sealing |
| Flexural modulus | 0.80 GPa | 0.95 GPa to 1.10 GPa | 1.30 GPa to 1.60 GPa |
| Haze on 50 μm cast film | 2.5% | 2% to 4% | 4% to 6% |
| Primary layer function | Heat-seal skin | Sealant or lamination layer | Core or print web |
Because the terpolymer skin has lower thermal resistance than the homopolymer core, T3410 should not be used as a standalone layer in retort packages above 121 °C unless the film is supported by a high-melting core and the seal is placed outside the direct steam path. In lamination to metallized biaxially oriented polypropylene or aluminum foil, the sealant layer retains adequate bond to the tie layer when the adhesive cure is complete; converters should validate seal integrity under ASTM F88/F88M-21 after the lamination aging period. The product is supplied in natural pellet form; color concentrate addition may alter seal initiation temperatures and should be evaluated on a masterbatch-specific basis.
