| HS Code | 960528 |
| Melt Flow Rate 230 C 2 16kg | 7.6 g/10min |
| Density 23 C | 0.90 g/cm³ |
| Tensile Strength At Yield | 28 MPa |
| Elongation At Break | 500% |
| Flexural Modulus | 850 MPa |
| Izod Notched Impact Strength 23 C | 5.0 kJ/m² |
| Heat Deflection Temperature 0 45 Mpa | 80 °C |
| Vicat Softening Point | 120 °C |
| Rockwell Hardness R Scale | 80 |
| Haze Film | 1.5% |
As an accredited Sinopec PP Terpolymer ZHP7642 (PPT-FM08-G) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sinopec PP Terpolymer ZHP7642 (PPT-FM08-G) is supplied in 25 kg woven polypropylene bags with PE inner liner for moisture protection and safe transport. |
| Container Loading (20′ FCL) | One 20-foot container loaded with Sinopec PP Terpolymer ZHP7642 in bags, properly secured, ventilated, and sealed for safe transport. |
| Shipping | Sinopec PP Terpolymer ZHP7642 (PPT-FM08-G) ships as resin pellets in sealed woven bags or bulk containers. Store in a cool, dry, ventilated area away from heat, moisture, and direct sunlight. No hazardous classification; handle gently to prevent bag damage and keep containers clean during transport. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep original packaging sealed and undamaged to prevent moisture contamination and contamination by dust or dirt. Avoid excessive stacking or mechanical damage. Use within recommended shelf life, typically two years from production date under proper storage conditions. |
| Shelf Life | Shelf life is typically 2 years from manufacture when stored unopened in a cool, dry place away from direct sunlight. |
In coextruded biaxially oriented polypropylene (BOPP) food packaging, Sinopec ZHP7642 (PPT-FM08-G) is evaluated as the heat-sealable skin layer over a propylene homopolymer core. The resin grade code implies a nominal melt mass-flow rate of 8 g/10 min when determined by ISO 1133-1:2022 at 230 °C under 2.16 kg; converter lot certificates should be checked because melt flow rate variation of ±0.5 g/10 min shifts sealant extrusion pressure profile on a 3.5 m wide tenter line. A three-layer A/B/A structure typically carries ZHP7642 at 1.5 µm to 3.5 µm per skin and a homopolymer core at 15 µm to 25 µm. Extruder barrel temperatures are held between 210 °C and 240 °C for the skin extruder, the feedblock and die are set at 235 °C to 245 °C, and the quench roll is controlled at 25 °C to 32 °C. The sheet is stretched sequentially at machine-direction draw ratios of 4.5:1 to 5.0:1 in the range 120 °C to 135 °C, followed by transverse draw ratios of 7.5:1 to 8.5:1 at 155 °C to 165 °C. Web line speeds above 320 m/min require tighter control of skin thickness; field data from tenter lines indicates that transverse gauge variation beyond ±0.3 µm produces intermittent seal channel leakage at jaw misalignment. Seal initiation temperature measured under ASTM F1921 at 0.5 N/25.4 mm typically falls between 94 °C and 103 °C for this terpolymer class, which is 20 K to 30 K lower than a propylene homopolymer. Hot tack strength must be checked at 115 °C to 125 °C using ASTM F1921; this determines whether the standard additive package, normally 1000 ppm to 2000 ppm silica antiblock and 500 ppm to 1000 ppm erucamide slip, is adequate. Finished applications include cookie and snack bags, confectionery twist wrap, and multipack moisture-barrier overwrap. Surface moisture from additive concentrates stored above 60% RH should be removed before use; drying at 70 °C for 2 h to 4 h is sufficient to prevent haze from hydrolyzed slip masterbatch.
On horizontal form-fill-seal packaging lines, cast polypropylene sealant webs use ZHP7642 in the sealant layer because the lower melting endotherm permits seal bar contact times below 0.3 s without fouling the sealing jaw. A coextruded A/B/C cast film configuration places ZHP7642 at 15% to 25% of total web thickness, typically 20 µm to 50 µm, over a PP homopolymer or PP random copolymer core. On a cast film line equipped with 65 mm to 90 mm single-screw extruders having L/D 30:1 to 36:1, barrel temperatures for the sealant layer are set at 200 °C to 235 °C, the flat die is held at 235 °C to 245 °C, and the air gap is maintained between 15 mm and 25 mm. The chill roll temperature is the dominant variable: temperatures above 28 °C increase adhesion to the roll and create blocking, while temperatures below 18 °C lower optical clarity and increase haze because of rapid surface quenching. Corona treatment should achieve wetting tension of 40 mN/m to 42 mN/m when tested by ASTM D2578, otherwise solventless lamination adhesive at 1.8 g/m² to 2.4 g/m² will not anchor to the ZHP7642 surface. After adhesive lamination to BOPP or PET, seal strength measured by ASTM F88 at 120 °C jaw temperature and 0.3 s dwell should be recorded; values below 6 N/25 mm on 30 µm total web indicate that chill roll temperature or corona treatment is outside specification. Hot tack measured by ASTM F1921 at 130 °C separates acceptable sealant webs from films that fail when product weight stresses the still-molten seal. This application is limited to packaging that is not retorted above 100 °C; continuous retort at 121 °C exceeds the crystalline stability of this terpolymer and should be validated only with a higher-melting PP random copolymer or homopolymer replacing ZHP7642. Finished articles include dry-food pouches, frozen-food wraps, lamination base webs for paper/PE structures, and non-retort stand-up pouches for powders and candies.
High-speed cigarette pack overwrap lines impose a sealant layer that must open cleanly without tearing, and ZHP7642 can be positioned as the inner sealing skin in a three-layer BOPP overwrap film. The outermost skin is usually a homopolymer PP or PP random copolymer for mechanical stiffness and low organoleptic interaction; the inner ZHP7642 skin is typically 1.0 µm to 2.0 µm. Total film thickness ranges from 16 µm to 22 µm. On a sequential biaxial orientation line, the cast sheet is quenched at 25 °C, stretched in machine direction at 115 °C to 130 °C, and stretched in transverse direction at 155 °C to 162 °C. The lower seal initiation temperature of the terpolymer skin allows packers to reduce overwrap sealing jaw temperature from the 140 °C to 150 °C range required by homopolymer films to 105 °C to 115 °C; this contributes to fewer heat-induced tears at packet corners. However, line speeds above 500 packs/min require controlled slip additive bloom. For this use, the film formulation typically includes 500 ppm to 800 ppm erucamide and 800 ppm to 1500 ppm silica antiblock. Dynamic coefficient of friction measured by ISO 8295 should remain between 0.25 and 0.35; lower values cause pack slippage on roller infeed, and higher values cause overwrap jams. Haze tested by ASTM D1003 must remain below 1.5% on 20 µm film. The grade’s low-temperature sealability makes overwrap film compatible with soft cups, hinge-lid boxes, and bundle wraps. Published data for ZHP7642 in cigarette film structures specifically is limited; converter trials usually require full qualification on the actual packing machine because jaw dwell time below 50 ms varies by brand and paperboard stiffness.
For transparent stationery articles such as document sleeves, binder inserts, and photo-album pockets, ZHP7642 supplies a low-temperature sealant layer in cast or calendered polypropylene sheet. The resin is coextruded as a thin sealant skin over a PP homopolymer or random copolymer core, with the sealant layer at 8% to 15% of total thickness, normally 60 µm to 100 µm for punched sleeves. Edge sealing is performed by heated bars at 95 °C to 110 °C and dwell times of 0.5 s to 1.0 s; the lower seal initiation temperature prevents edge shrinkage and wavy borders. Chill-roll temperature during cast sheet production is critical: below 20 °C, high optical clarity is achieved but surface defects from rapid quench increase; above 26 °C, blocking between sheets rises because the terpolymer sealant skin softens. The formulation should include 1000 ppm to 2500 ppm synthetic silica antiblock of 3 µm to 5 µm median particle size and 300 ppm to 600 ppm slip additive to maintain handling. Haze measured by ASTM D1003 on 80 µm sheet is typically below 2.5% if the outer core contains no recycled homopolymer. Blocking force measured by ASTM D3354 should be monitored at 40 °C and 50% RH; field reports from converters show that high ambient humidity above 70% RH and warehouse temperatures above 35 °C promote surface migration and raise blocking force beyond acceptable converting levels. Recycled edge trim containing ZHP7642 should be limited to 10 wt% unless a compatibilized re-feed system is used, otherwise optical haze and seal uniformity drift. Finished products include punched pockets, ring-binder sleeves, menu covers, and transparent protective enclosures. This application requires no food-contact certification when the final article is used only for stationery; if the sleeves contact food, compliance with FDA 21 CFR 177.1520 and EU 10/2011 must be verified for all layers.
Sterile barrier packaging for single-use medical devices is a lower-volume but technically sensitive downstream segment for ZHP7642. In form-fill-seal constructions, the resin can serve as a heat-seal layer against a polyolefin tray or lidding substrate, but converter validation is mandatory before any commercial use. A coextruded lidding web typically contains ZHP7642 at 15 µm to 30 µm of a 50 µm to 120 µm total web, laminated to a polyester or polyamide external surface for mechanical strength. Seal transfer on tray lidding lines operates at 110 °C to 120 °C, with dwell times of 0.5 s to 1.0 s. Seal strength must be tested according to ASTM F88 and recorded as a process validation parameter; the sterile barrier system itself must satisfy ISO 11607-1:2019 and ISO 11607-2:2019 as applicable. The terpolymer’s lower softening point is an advantage for heat-seal equipment that cannot exceed 125 °C, but it also defines the upper sterilization limit. Ethylene oxide sterilization at 50 °C to 55 °C is generally compatible provided that outgassing periods are validated; steam sterilization at 121 °C or hydrogen peroxide plasma sterilization requires specific migration and mechanical integrity testing before release. The resin does not inherently prevent microbial penetration, and no antimicrobial property should be claimed. Published data for ZHP7642 in validated sterile barrier systems is limited; each converter must generate its own seal strength, visual seal integrity, dye penetration, and accelerated aging data according to the final pouch configuration. If the medical contact layer is covered by a functional barrier, chemical safety documentation is still required under ISO 10993-1:2018 and regional device regulations. Finished articles are most likely to be found in non-retort lidding films, breathable strip pouches, and device overwraps where peel strength and particulate control are defined by converter specification rather than by the resin supplier alone.
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Sinopec PP Terpolymer ZHP7642 (PPT-FM08-G) is a propylene-ethylene-butene-1 random terpolymer classified under ISO 1043-1 as PP/E/B. The grade identifier ZHP7642 is the commercial designation used on certificates of analysis, while PPT-FM08-G is the internal Sinopec film-grade code for product stewardship and production tracking. The resin is supplied as stabilized spherical pellets intended for heat-sealable skin layers in coextruded cast polypropylene film and cast extrusion coating structures where reduced seal initiation temperature, wide hot-tack window, and high transparency are required. Because the manufacturer publishes detailed lot-release data through regional technical service channels, the numerical ranges in this overview are representative of propylene-ethylene-butene-1 terpolymer film grades of this class and are not batch-specific specifications. Purchasers should use the certificate of analysis and the applicable food-contact compliance statement for the specific lot and final film structure.
Melt flow rate measured according to ISO 1133-1:2022 at 230 °C and 2.16 kg falls between 6.0 g/10 min and 10.0 g/10 min for this grade class. This viscosity balance supports thin sealant-layer processing on cast film lines while preserving adequate melt strength during draw-down. Density determined by ISO 1183-1:2019 is normally 0.890–0.905 g/cm³. Differential scanning calorimetry to ISO 11357-3:2018 commonly shows a melting endotherm peak between 120 °C and 135 °C and crystallization onset between 80 °C and 95 °C at a cooling rate of 10 °C/min. The broad, depressed melting range results from random incorporation of ethylene and butene-1, which limits isotactic crystallite thickness and creates a more gradual loss of crystallinity during sealing than in a homopolymer.
Optical and mechanical properties are normally tested on 50 μm cast film conditioned at 23 °C ± 2 °C and 50% ± 10% RH according to ISO 291:2008. Haze by ASTM D1003-21 is typically below 2.0%, and 45° gloss by ASTM D2457-21 is typically above 85 when the film is rapidly quenched on a chill roll held at 15–25 °C. Tensile yield stress by ISO 527-2:2012 is lower than that of propylene homopolymer film, generally in the 18–25 MPa range, while elongation at break exceeds 400%. The product is designed as a sealant skin rather than a monolayer structural film, so stiffness and puncture resistance in the final structure depend on the core layer and total thickness.
Rheological characterization on a rotational rheometer at 230 °C shows a shear-thinning index between 0.35 and 0.55 in the 100 s⁻¹ to 1000 s⁻¹ shear-rate interval. Capillary rheometry at an apparent shear rate of 1000 s⁻¹ normally gives an apparent viscosity below 200 Pa·s. These values are class-typical and are influenced by comonomer distribution and additive package; published data for the exact PPT-FM08-G formulation is limited in open technical literature. The melt is less elastic than high-molecular-weight BOPP-grade polypropylene, which reduces die swell and improves draw-down stability at 20–50 μm final film thickness.
Thermal stability of the grade class can be assessed by oxidative induction time according to ISO 11357-6:2018; stabilized propylene terpolymer film grades of this type commonly show an oxidative induction time greater than 20 min at 200 °C under oxygen. This value is sensitive to residual metal stearates and acidic additive chemistries, so pre-compounded masterbatches should be evaluated before production. The lower crystallinity of the terpolymer also raises oxygen permeability relative to homopolymer PP; this is acceptable in a sealant skin but must be considered if the material is used in a barrier-relevant layer. No product-specific oxygen transmission rate is quoted here because permeability depends on total film thickness, orientation, and coextruded barrier layers.
| Property | Test method | ZHP7642-class terpolymer | PP-ethylene random copolymer |
|---|---|---|---|
| MFR at 230 °C/2.16 kg | ISO 1133-1:2022 | 6.0–10.0 g/10 min | 6.0–9.0 g/10 min |
| Density | ISO 1183-1:2019 | 0.890–0.905 g/cm³ | 0.895–0.910 g/cm³ |
| Melting peak | ISO 11357-3:2018 | 120–135 °C | 130–145 °C |
| Seal initiation temperature | ASTM F2029-16 | 105–120 °C | 125–135 °C |
| Hot-tack plateau | ASTM F1921-12 | wide; >2.0 N/15 mm | narrower |
| Haze on 50 μm film | ASTM D1003-21 | <2.0% | <2.5% |
On production-scale cast film lines, ZHP7642 is processed at a die melt temperature of 230–250 °C. Sustained melt temperatures above 260 °C are not recommended because thermally oxidized terpolymer fractions can deposit on the die lip, vacuum knife, and chill-roll surfaces, producing transfer marks and optical haze. If the resin has been stored under conditions exceeding 60% RH, pre-drying at 80 °C for 2–3 h is recommended before extrusion. Screw speed, back pressure, and air gap are selected to maintain web stability; a reduced chill-roll temperature promotes rapid solidification and is critical for optical clarity, but chill-roll temperatures below 10 °C can cause condensation and static charge buildup. These processing limits are based on cast-film equipment with 30:1 to 40:1 L/D single-screw extruders; published data for other extruder configurations is limited.
Seal initiation temperature and hot-tack strength are not simple functions of the DSC melting peak. They depend on secondary crystallization after the seal is quenched and on residual chain mobility in the amorphous interlayer. For ZHP7642, the combination of ethylene and butene-1 comonomers shifts the practical seal initiation temperature to approximately 105–120 °C when tested by ASTM F2029-16 on 50 μm cast film at 0.28 MPa seal pressure and 0.5 s dwell time. A conventional propylene-ethylene random copolymer sealant typically requires 125–135 °C under the same conditions, and a homopolymer requires 150–160 °C. Hot-tack strength measured by ASTM F1921-12 remains above 2.0 N/15 mm over a wider temperature interval than random copolymer grades. The wider plateau is attributed to slower crystallization kinetics in the terpolymer sealant layer; the partially molten interlayer retains load-bearing entanglement for a longer time before solidification arrests chain diffusion.
In a three-layer coextruded cast film, the ZHP7642 skin is typically used at 10–20% of total thickness. The sealant skin thickness should remain above 3 μm to avoid discontinuities that reduce seal strength. Seal-bar temperature, dwell time, and pressure should be optimized for the substrate; seal-bar temperatures above 140 °C can cause the sealant layer to squeeze out and expose the core, weakening the seal. At seal-bar temperatures below 105 °C, seal strength may not reach the 2.0 N/15 mm threshold, particularly if slip additive bloom has already occurred. Recommended seal-pressure range for 50 μm cast film is 0.2–0.4 MPa with a dwell of 0.3–0.5 s; these settings are common on horizontal flow wrappers and vertical form-fill-seal machines. Serrated sealing jaws can tolerate a wider temperature range than flat jaws but may tear thin films if pressure exceeds 0.4 MPa.
For printing or lamination, the sealant surface can be corona treated to 38–42 mN/m before lamination. However, corona treatment of the sealant layer may increase seal initiation temperature by crosslinking the surface, so treatment should be limited to the print or lamination side. The seal side should be maintained below 36 mN/m unless the converter has validated seal performance after treatment. This operational boundary is critical for films that are printed after slitting.
Compared with a propylene-ethylene random copolymer, ZHP7642 incorporates butene-1 as a third monomer, which reduces the seal initiation temperature without increasing ethylene content to the point of excessive blocking or severe modulus loss. The practical difference is a lowering of the seal-bar setpoint by 5–15 °C and a wider hot-tack window, while the sealant layer retains enough crystallinity to avoid high film-to-film blocking at ambient storage temperatures below 40 °C. The material differs from homopolymer PP in lower modulus and yield stress, higher impact energy, and lower seal initiation temperature; those trade-offs mean the terpolymer is not suitable as a structural core and should not be used at high thickness fractions unless stiffness is supplied by coextruded layers. It also differs from metallocene polyolefin plastomers and ionomers, which can seal below 100 °C but generally have lower stiffness, higher cost, and greater blocking tendency. For ultra-low-temperature sealing below 100 °C, published data for this specific configuration is limited and a plastomer or ionomer sealant should be evaluated separately.
The composition difference is not determined solely by average comonomer content; the distribution of comonomers along the chain and the control of low-molecular-weight fractions affect sealing and blocking behavior. The terpolymer production process is designed to yield a narrow composition distribution, reducing the fraction of very low molecular weight chains that bloom to the surface and lower blocking resistance. This is a key difference between ZHP7642 and simple reactor blends of propylene copolymer and elastomer. In contrast to impact copolymer PP, which is heterophasic and contains discrete rubber domains, the terpolymer remains monophasic in the melt and minimizes large-scale phase separation that can cause optical haze and inconsistent seal strength.
Additive compatibility requires attention because the lower crystallinity of the terpolymer increases migration rates of slip and antiblock additives. Erucamide-based slip concentrates can be used at 0.5–2.0 wt% in the sealant layer to achieve a film-to-film coefficient of friction below 0.30; however, erucamide bloom continues after film production and can reduce seal strength if the film is stored for 7–14 days before packaging. Synthetic silica antiblock at 0.1–0.5 wt% is generally compatible, but high loadings may increase haze. Avoid combining the terpolymer with strongly acidic additives or unneutralized catalyst residues that accelerate oxidative chain scission at the die lip; the resulting low-molecular-weight species are a source of die-lip deposit and odor in the film. The grade is not recommended for injection molding or thermoforming processes where melt strength and high-temperature stiffness are required.
Because the terpolymer contains no reactive polar groups, direct adhesion to EVOH, polyamide, or aluminum foil is limited; coextruded barrier structures should include a maleic-anhydride-modified polyolefin tie layer between the sealant skin and the barrier layer. The tie layer thickness is typically 5–10 μm in cast film structures, depending on the barrier resin and the desired interlayer bond strength. Without the tie layer, delamination can occur at the shear interface during flex-crack testing or retort lamination.
| Framework | Provision or test method | Typical criterion |
|---|---|---|
| EU No 10/2011 | Overall migration, simulant D2, 10 days at 40 °C | ≤ 10 mg/dm² |
| FDA 21 CFR 177.1520 | Olefin polymer food-contact specification | End-use condition dependent |
| REACH SVHC | Candidate list screening | No SVHC > 0.1 wt% declared |
| RoHS 2011/65/EU | Pb, Cd, Hg, Cr(VI), PBB, PBDE | Polymer substrate generally compliant; verify additive and colorant package |
