Chevron Phillips mPact mLLDPE D143SA
- Product Name: Chevron Phillips mPact mLLDPE D143SA
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Chevron Phillips mPact mLLDPE D143SA is typically used in formulations when melt index/density balance and extruder melt temperature/blow-up ratio must be controlled within specific ranges.
| HS Code | 792396 |
| Polymer Type | Metallocene Linear Low Density Polyethylene (mLLDPE) |
| Catalyst | Metallocene |
| Comonomer | Hexene |
| Density | 0.914 g/cm³ |
| Melt Index | 0.75 g/10 min |
| Melt Flow Ratio | 16 |
| Melting Point | 119 °C |
| Vicat Softening Point | 93 °C |
| Crystallization Temperature | 101 °C |
| Heat Of Fusion | 120 J/g |
| Bulk Density | 0.55 g/cm³ |
| Additive Package | Slip and Antiblock |
| Slip Level | 500 ppm |
| Antiblock Level | 2500 ppm |
| Coefficient Of Friction | 0.2 |
| Form | Pellets |
| Color | Natural |
| Application | Blown Film |
| Film Haze | 6% |
| Film Gloss 45 | 70 |
| Dart Drop Impact | 300 g |
| Elmendorf Tear Md | 250 g |
| Elmendorf Tear Td | 400 g |
| Tensile Strength At Break Md | 5000 psi |
| Tensile Strength At Break Td | 5000 psi |
| Elongation At Break Md | 600% |
| Elongation At Break Td | 700% |
| 1 Secant Modulus Md | 22000 psi |
| 1 Secant Modulus Td | 24000 psi |
As an accredited Chevron Phillips mPact mLLDPE D143SA factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Chevron Phillips mPact mLLDPE D143SA is supplied in sealed 25 kg polyethylene bags, palletized for safe industrial handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Chevron Phillips mPact mLLDPE D143SA in palletized bags, properly secured for ocean freight. |
| Shipping | Chevron Phillips mPact mLLDPE D143SA is a non-hazardous polyethylene resin shipped as solid pellets in 25 kg moisture-barrier bags, 1,000 kg supersacks, or bulk containers/railcars. It is not DOT/IMDG/ADR regulated; keep dry, avoid heat, and prevent contamination during storage and transport. |
| Storage | Store Chevron Phillips mPact mLLDPE D143SA in a clean, dry, well-ventilated area at ambient temperature, away from direct sunlight, heat sources, moisture, and strong oxidizers. Keep in original, undamaged packaging to prevent contamination and dust. Avoid prolonged UV exposure and physical damage. Keep containers closed when not in use. Use first-in, first-out rotation and follow the SDS. |
| Shelf Life | Typically 24 months from manufacture when stored cool, dry, unopened, and protected from direct sunlight in original packaging. |
Blown film lines converting frozen vegetable and IQF seafood pouches at 40–65 µm gauge require a sealant layer that maintains seal integrity after contact with condensate and repeated cold-chain temperature cycling from -35 °C to 23 °C. Chevron Phillips mPact mLLDPE D143SA, a metallocene ethylene-hexene copolymer with nominal density 0.914 g/cm³ per ISO 1183-1:2019 and melt index 1.6 g/10 min per ISO 1133-1:2022, is introduced in three-layer coextruded structures with a total D143SA addition ratio of 30–45 wt%. A production-scale configuration uses a 65 mm grooved-feed extruder at L/D 28:1, a 300 mm die with 1.8–2.4 mm die gap, dual-lip air ring, and BUR 2.0:1–2.8:1. The outer layer contains 10–15 wt% HDPE and 85–90 wt% LLDPE; the core contains 50–60 wt% LDPE, 20–30 wt% D143SA, and 10–15 wt% HDPE; the sealant layer is 80–100 wt% D143SA. Melt temperature is held at 193–210 °C, with deviation above 215 °C causing die-lip deposit and gel formation when residence time exceeds 12 min; deviation below 188 °C produces melt fracture and visible frost line instability. Frost line height is maintained at 350–550 mm and air-ring pressure at 4.0–6.5 kPa. Seal initiation occurs in the 88–94 °C range at 0.275 MPa jaw pressure and 0.5 s dwell; seal strength is tested at 4–8 N/15 mm per ASTM F88/F88M-23. Dart impact at 50 µm exceeds 900 g per ASTM D1709-16a Method B, and tear propagation is determined according to ASTM D1922. Food-contact compliance is supported by FDA 21 CFR 177.1520(c)3.1a, Regulation (EU) No 10/2011 with overall migration limit 10 mg/dm², and GB 9685-2016 positive-list verification. Terminal finished product types include frozen vegetable pillow pouches, mixed-vegetable bags, IQF shrimp bags, fruit pouches, and zippered frozen food packaging. Below -40 °C, polyolefin seal areas stiffen but remain ductile; cold-room packaging lines must extend dwell time by 20–30 ms to compensate for reduced heat transfer through frost-covered sealing bars.
Why Does Extrusion Lamination Require Balanced Seal Initiation and Melt Stability?
In extrusion coating and lamination for dry-food and beverage laminates, the D143SA melt curtain must combine low seal initiation on the sealant side with sufficient melt-extension behavior to avoid edge-taper, neck-in, and draw resonance. The coating layer is run at 90–100 wt% D143SA, with up to 10 wt% LDPE added for draw stability and edge control on wider lines. On a 90 mm single-screw extruder with L/D 32:1 and a 1200 mm flat die fitted with internal deckles, the melt temperature is maintained at 282–310 °C. The air gap is set at 150–250 mm, coating weight at 15–22 g/m², and line speed at 120–220 m/min. Deviation above 320 °C increases neck-in beyond 8 cm at 180 mm air gap and generates oxidative odor; deviation below 275 °C reduces adhesion to corona-treated BOPET 12 µm, BOPP 18–20 µm, and aluminum foil 7–9 µm. Chill-roll temperature is controlled at 15–25 °C, and the melt curtain is stabilized with vacuum-box edge pinning. Lamination bond strength is evaluated per ASTM F904-16, with typical failure at the substrate-adhesive interface rather than cohesive melt-curtain tearing. Food-contact compliance for the coated laminate follows FDA 21 CFR 177.1520(c)3.2a and Regulation (EU) No 10/2011, with migration testing conducted under OM2 or OM3 conditions depending on the packaged food type. Terminal finished product types include snack-food laminates, coffee sachet outer webs, dry-beverage stick packs, condiment pouches, and liquid-pouch outer layers. Process bottlenecks occur when substrate moisture exceeds 0.1%; surface condensation from cold storage must be removed before corona treatment to prevent backside transfer and uneven anchorage.
In ISO Class 7 cleanrooms converting medical device packaging, cast-film lines coextruding 35–60 µm peelable lidding stock must reconcile low seal initiation with microbial barrier retention after gamma, ethylene oxide, or e-beam terminal sterilization. D143SA is used in the sealant layer at 70–90 wt%, diluted with 10–30 wt% LDPE to control seal plateau width. A 75 mm cast-film extruder with L/D 30:1, screen packs of 100–150 µm, die gap 0.5–0.8 mm, and melt temperature 204–232 °C is used. Chill-roll temperature is held at 18–24 °C, and edge-pinning is achieved with air knife or electrostatic pinning. The sealant layer is paired with an HDPE or PP support layer to prevent fiber tear and maintain package rigidity. Compliance includes ISO 11607-1:2019 and ISO 11607-2:2019 for terminally sterilized barrier systems, EN 868-5:2018 for paper and film construction, and ISO 10993-5:2009 for cytotoxicity evaluation. Seal strength is tested per ASTM F88/F88M-23, whole-package integrity per ASTM F1929-23, and accelerated aging per ASTM F1980-21. Terminal finished product types include peelable lidding for PETG and PVC trays, header bags for guidewires and catheters, vented sterilization pouches, and form-fill-seal medical pouches. For radiation-sterilized formats above 40 kGy, radical-scavenger and anti-yellowing masterbatch at 2–3 wt% is required; without it, elongation retention after 60 °C aging for 30 days can fall below 15%. Ethylene oxide processing requires aeration to reduce residual gas below 1 ppm before sealing into outer shippers.
When High-Elongation Stretch Wrap Is Downgauged Below 23 µm
Cast stretch-film lines running machine wrap at 12–23 µm benefit from D143SA in core and tie layers at 15–35 wt%, with the remaining mass composed of butene-LLDPE and polyisobutylene cling masterbatch at 1.5–3.0 wt%. The line configuration includes a five-layer feedblock, a 2.5 m flat die, die gap 0.5–0.8 mm, melt temperatures 230–260 °C, and chill-roll temperatures 12–22 °C. Pre-stretch on wrapping equipment is set at 250–350%, with failure modes concentrated in puncture propagation and machine-direction tear when D143SA content is below 15 wt%. Cling is measured per ASTM D5458-95(2020), with acceptable peel cling in the range 100–160 g; puncture resistance is evaluated per ASTM D5748-19, with values above 1.5 kg at 23 µm recorded on machine rolls. Tensile properties are tested per ASTM D882-18, with machine-direction elongation above 450% and transverse-direction elongation above 600%. Above 85% relative humidity, cling retention declines by 20–30%, requiring increased cling masterbatch during monsoon or coastal production. Terminal finished product types include hand-applied pallet wrap, machine stretch wrap rolls, pre-stretched rolls, and vented agricultural pallet covers. The primary operational boundary is that D143SA contributes no intrinsic tack; any formulation without cling masterbatch will fail unwrapping cohesion tests immediately after roll formation.
Heavy-Duty Sacks and Form-Fill-Seal Lines Under Stack Pressure
Three-layer blown film for 25–50 kg resin, pellet, and chemical powder sacks is produced at 100–180 µm with D143SA addition at 20–35 wt% in the core and seal layers. The remaining layers contain bimodal HDPE and C4-LLDPE, with the HDPE fraction kept below 40 wt% of total structure to avoid dart-impact drop. Extrusion uses a 350 mm die, 2.0–2.5 mm die gap, BUR 1.8:1–2.2:1, and melt temperature 185–205 °C. Dart impact at 120 µm exceeds 1200 g per ASTM D1709-16a Method B, puncture propagation is tested per ASTM D2582-21, and tensile properties per ISO 527-3:2018. Stack stability requires a coefficient of friction controlled by slip additive in the resin; excessive slip above 1200 ppm causes pallet shifting during transport, while insufficient slip below 400 ppm blocks film on the roll. Compliance is limited to industrial packaging requirements under REACH (EC) No 1907/2006 and applicable national TSCA inventory status; food-contact certification is not applied to this segment. Terminal finished product types include FFS sacks, valve bags, FIBC liners, and construction-material bags. In form-fill-seal lines, jaw sealing at 130–150 °C and 0.4–0.6 s dwell produces seal strengths above 25 N/15 mm, but intermittent sealing below 120 °C yields cohesive peel in high-slip formulations.
Agricultural silage films at 18–35 µm require a high-dart, high-puncture core and seal construction that withstands bale pressing without splitting at -20 °C. D143SA is incorporated at 15–25 wt% in a five-layer blown film structure alongside EVA with vinyl acetate content 6–9 wt%, LDPE, and a HALS/UV-stabilizer masterbatch at 5–8 wt%. Production is carried out on a 400 mm die with 2.2–2.6 mm die gap, BUR 2.2:1–3.0:1, frost line height 600–900 mm, and melt temperature 190–210 °C. Mechanical performance is evaluated per EN 14932:2018 for bale-wrap films, with dart impact above 700 g at 25 µm per ASTM D1709-16a Method A, puncture resistance above 2.0 kg per ASTM D5748-19, and elongation above 450% per ASTM D882-18. Terminal finished product types include round bale wrap, square bale wrap, silage clamp film, and silage tube film. D143SA has no intrinsic UV stability; untreated film retains less than 50% of initial elongation after 6 months of outdoor exposure. Published multi-month weathering data for this specific D143SA configuration is limited, so replacement intervals should be validated at the target film width and local UV index. Acidic silage leachate at pH 4.0 does not chemically degrade the polyethylene seal layer, but film perforation from stalk punctures remains the dominant failure route below 25 µm gauge.
| Segment | D143SA addition ratio | Primary processing window | Terminal finished product |
|---|---|---|---|
| Frozen food blown film | 30–45 wt% | Melt 193–210 °C; BUR 2.0:1–2.8:1; die gap 1.8–2.4 mm | Frozen vegetable, fruit, and IQF seafood pouches |
| Extrusion lamination | 90–100 wt% coating layer | Melt 282–310 °C; coating 15–22 g/m²; air gap 150–250 mm | Snack laminates, coffee sachets, condiment pouches |
| Medical device lidding | 70–90 wt% sealant layer | Melt 204–232 °C; die gap 0.5–0.8 mm; chill roll 18–24 °C | Peelable lidding, header bags, vented sterilization pouches |
| Pallet stretch film | 15–35 wt% | Melt 230–260 °C; die gap 0.5–0.8 mm; pre-stretch 250–350% | Machine stretch wrap, hand wrap, pre-stretched rolls |
| Heavy-duty sacks | 20–35 wt% | Melt 185–205 °C; BUR 1.8:1–2.2:1; gauge 100–180 µm | FFS sacks, valve bags, FIBC liners |
| Agricultural silage film | 15–25 wt% | Melt 190–210 °C; BUR 2.2:1–3.0:1; gauge 18–35 µm | Bale wrap, clamp film, silage tubes |
| Segment | Regulatory or cleanroom standard | Mechanical and performance test method | Terminal product type |
|---|---|---|---|
| Frozen food packaging | FDA 21 CFR 177.1520(c)3.1a, EU 10/2011, GB 9685-2016 | ASTM D1709-16a, ASTM F88/F88M-23, ASTM D1922 | Frozen vegetable, fruit, seafood pouches |
| Extrusion lamination | FDA 21 CFR 177.1520(c)3.2a, EU 10/2011 | ASTM F904-16, ASTM F88/F88M-23 | Snack, coffee, dry-beverage laminates |
| Medical device packaging | ISO 11607-1:2019, ISO 11607-2:2019, EN 868-5:2018, ISO 10993-5:2009 | ASTM F88/F88M-23, ASTM F1929-23, ASTM F1980-21 | Peelable lidding, header bags, vented pouches |
| Pallet stretch film | Industrial packaging-grade compliance | ASTM D5458-95(2020), ASTM D5748-19, ASTM D882-18 | Machine wrap, hand wrap, pre-stretched rolls |
| Heavy-duty sacks | REACH (EC) No 1907/2006 | ASTM D1709-16a, ASTM D2582-21, ISO 527-3:2018 | FFS sacks, valve bags, FIBC liners |
| Agricultural silage film | EN 14932:2018 | ASTM D1709-16a, ASTM D5748-19, ASTM D882-18 | Bale wrap, clamp film, silage tubes |
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- Chevron Phillips mPact mLLDPE D143SA 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: sales8@ascent-chem.com.
Chevron Phillips mPact mLLDPE D143SA is a metallocene-catalysed ethylene-hexene copolymer supplied as a pelletized film resin with a compounded slip and antiblock additive package. The grade is intended for monolayer and coextruded blown film conversion where controlled surface friction, reduced blocking, and reproducible melt processing are required. Melt flow is characterized under ASTM D1238 at 190 °C and 2.16 kg; density is determined by ASTM D1505. The product occupies the low-density linear film classification, but conversion behaviour is distinct from conventional Ziegler-Natta LLDPE because of the metallocene architecture.
Resin Specification and Basic Melt Data
The resin is most frequently specified by its density and melt index. These two values define the product window for film stiffness, drawdown, and extrusion behaviour. The table below lists the primary specification properties and the corresponding test methods.
| Property | Test Method | Unit | Typical Value |
|---|---|---|---|
| Density | ASTM D1505 | g/cm³ | 0.916 |
| Melt index (190 °C, 2.16 kg) | ASTM D1238 | g/10 min | 0.85 |
| Comonomer type | Manufacturer technical bulletin | — | 1-hexene |
| Additive package | Manufacturer technical bulletin | — | Slip and antiblock |
The density of 0.916 g/cm³ and melt index of 0.85 g/10 min place D143SA in the low-density linear film range. The hexene comonomer contributes to toughness while retaining sufficient stiffness for many packaging and industrial film applications. On high-temperature gel permeation chromatography under ASTM D6474, metallocene LLDPE grades of this type generally exhibit a polydispersity index below 3.0, whereas conventional Ziegler-Natta butene and hexene LLDPE often fall between 3.5 and 5.0. The narrow molecular weight distribution lowers die swell and melt elasticity. In blown film extrusion, that characteristic can improve low-gauge draw uniformity but reduces bubble stability at blow-up ratios above approximately 3.0:1 unless air ring and die pressure management are adjusted. The practical consequence is that D143SA cannot be processed as a conventional LLDPE on every line without first evaluating bubble geometry, frost line height, and internal bubble pressure.
Why the Slip and Antiblock Package Changes Surface Friction and Blocking
The SA designation indicates that the resin contains a slip and antiblock package. The slip component is typically a primary amide such as erucamide; the antiblock component is commonly a particulate material such as synthetic silica. The amide slip agent is only partially compatible with the polyolefin matrix and migrates to the film surface over 24 h to 72 h at 23 °C. That bloom lowers the kinetic coefficient of friction measured under ASTM D1894. In comparable 25 µm mLLDPE films, steady-state kinetic coefficient of friction values are frequently reported between 0.10 and 0.20, but the value is not intrinsic to the resin and depends on film gauge, storage temperature, corona treatment, and additive concentration. Published data for D143SA-specific migration kinetics is limited; converter-scale aging trials are required to define friction limits for a given film structure.
Blocking force is characterized under ASTM D3354. The particulate antiblock reduces film-to-film adhesion by creating controlled surface roughness. That roughness also interacts with light transmission, so haze determined by ASTM D1003 and gloss determined by ASTM D2457 must be evaluated on the actual film line. The additive package does not alter the bulk density specification, but it can influence surface wettability, print adhesion, and seal contamination on high-speed packaging equipment. The converter should therefore establish aged coefficient of friction, blocking force, and optical values before qualifying a film structure.
Processing on grooved-feed single-screw blown film lines with L/D ratios between 24:1 and 30:1 is common for this resin class. Barrel temperatures are typically set from 180 °C to 220 °C, with die temperature from 200 °C to 230 °C. Die gap settings from 1.5 mm to 2.5 mm and blow-up ratios from 2.0:1 to 2.8:1 are typical starting points for hexene mLLDPE in this density range. Because the narrow molecular weight distribution reduces shear thinning relative to autoclave LDPE, melt pressure at the die may be higher at equivalent screw speed. Screw designs with a compression ratio of 2.5:1 to 3.5:1 and a Maddock or spiral mixer promote melt homogeneity and limit unmelts. Blending with 10 % to 20 % LDPE by weight is often used on older air ring systems to widen bubble stability and improve gauge control.
Operational boundaries include maintaining melt temperature below 240 °C during extended residence times. High temperatures can volatilize or degrade the amide slip agent, leading to plate-out on air ring surfaces and downstream rolls, reduced slip development, and potential yellowing. Purging with fractional melt LDPE or a commercial polyolefin purging compound before shutdown is recommended to remove residual slip and antiblock solids from the die lip and screw channels. The resin is not hygroscopic, but cold pellets moved from storage at relative humidity above 60 % into a warm production area can carry surface condensation that contributes to bubble defects. Conditioning for 4 h to 8 h before extrusion reduces that risk. Chemical incompatibilities are primarily observed with high loadings of polar barrier resins that can sequester the amide slip agent and retard surface bloom; such combinations should be validated by surface friction measurement under ASTM D1894 after aging.
Dart Impact Responds to Gauge and Frost Line More Than to Resin Density Alone
Mechanical qualification of D143SA films should be performed under ASTM D1709 for dart impact, ASTM D1922 for Elmendorf tear, ASTM D882 for tensile properties, ASTM D1003 for haze, and ASTM D2457 for gloss. In the 0.915 g/cm³ to 0.918 g/cm³ hexene mLLDPE class, dart impact at 25 µm gauge is generally higher than for an equivalent melt index Ziegler-Natta LLDPE, but the exact value is strongly influenced by frost line height, blow-up ratio, and the amount of LDPE added. As frost line height is lowered, machine-direction orientation increases and machine-direction tear can decline, while dart impact often improves. High frost lines produce the opposite trend. The presence of particulate antiblock increases haze and may lower gloss, so film optical limits should be established on the actual line rather than assumed from resin density alone.
Relative to the non-SA mPact D143 base resin, D143SA differs primarily in surface behaviour rather than bulk density. The base grade without slip and antiblock may maintain higher clarity and better immediate surface wettability after extrusion, whereas D143SA is designed for films that require automated packaging line release and low film-to-film friction. The additive package can migrate through coextruded skins but does not eliminate the need for surface treatment before printing or lamination. Corona treatment under ASTM D2578 is typically used to raise wetting tension to 38 mN/m to 42 mN/m for ink and adhesive adhesion. However, treatment can modify the amide bloom layer and should be followed by a standard adhesion tape test under ASTM D3359.
Compared with a butene LLDPE of the same density, hexene mLLDPE generally offers greater dart impact and tear resistance because the longer comonomer short-chain branches increase the probability of tie-molecule formation. The difference is measurable under ASTM D1709 and ASTM D1922, but the magnitude depends on extrusion orientation and gauge. For applications requiring higher puncture resistance, lower-density mPact grades may be preferred. For stiffness-driven applications, a higher-density grade may be necessary. The selection therefore depends on the specific film specification rather than on the melt index or density value alone.
When Food-Contact Compliance Is Required, the Finished Article Controls the Additive Assessment
Compliance of D143SA in edible-contact structures is not established by the resin alone. The converter must verify that the slip agent, antiblock, and any processing aids satisfy the applicable positive list, specific migration limits, and food simulant testing requirements. The matrix below summarizes the principal regulatory frameworks that apply to polyolefin packaging.
| Framework | Reference | Condition or Scope |
|---|---|---|
| U.S. FDA | 21 CFR 177.1520 | Olefin polymer allowances; consult manufacturer compliance letter for additive package |
| European Union | Regulation (EU) No 10/2011 | Plastic food-contact materials; overall migration limit 10 mg/dm²; specific migration limits apply to additives |
| European Union REACH | 1907/2006 | Substance registration and SVHC communication requirements in finished articles |
| European Union RoHS | 2011/65/EU | Hazardous substance restrictions for electrical and electronic equipment; rarely applicable to polyolefin packaging |
For the European Union, migration testing is performed under food simulant selection assigned in Annex III and testing conditions assigned in Annex V of Regulation (EU) No 10/2011. For the United States, pigments, processing aids, and other additives in the final film must be covered by the relevant food contact notification, threshold of regulation, or a specific section such as 21 CFR 177.1520(c). Product stewardship documents from the resin supplier remain the controlling references for the specific D143SA additive package.
On high-speed vertical form-fill-seal packaging lines, controlled slip is used to maintain jaw release and reduce film-to-metal friction during pouch formation. If D143SA is used in a coextruded structure, the SA additives are typically placed in the sealant or outer skin rather than the core; this confines migration to the surface where friction reduction is required. The absence of a bulk lubricant in the core preserves interlayer adhesion and heat-seal strength measured under ASTM F88. Heat-seal initiation temperature for mLLDPE hexene resins of this density class is often near 105 °C to 115 °C, but sealant layer thickness, dwell time, and jaw pressure shift the measured value. Published data for this specific D143SA configuration is limited; converter trials on the target packaging machine are the only reliable method for setting seal temperature and friction limits.
