Idemitsu HDPE CALP G-185
- Product Name: Idemitsu HDPE CALP G-185
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: admin@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Idemitsu HDPE CALP G-185 is typically used in formulations when melt flow rate and density and processing temperature and screw speed must be controlled within specific ranges.
| HS Code | 382033 |
| Density | 0.955 g/cm³ |
| Melt Flow Rate | 18 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 29 MPa |
| Tensile Elongation At Break | >500% |
| Flexural Modulus | 1.10 GPa |
| Notched Izod Impact Strength | 40 J/m |
| Shore D Hardness | 65 |
| Vicat Softening Temperature | 125°C |
| Heat Deflection Temperature At 0 45 Mpa | 75°C |
| Melting Point | 135°C |
| Mold Shrinkage | 1.5–2.5% |
| Water Absorption | <0.01% |
As an accredited Idemitsu HDPE CALP G-185 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Idemitsu HDPE CALP G-185 is supplied in 25 kg multiwall paper bags, palletized and stretch-wrapped, or 1,000 kg bulk jumbo bags. |
| Container Loading (20′ FCL) | 20′ FCL for Idemitsu HDPE CALP G-185: 25 kg bags; typical net weight 17–18 MT per container. |
| Shipping | Idemitsu HDPE CALP G-185 is a non-hazardous polyethylene resin. It is typically shipped in 25 kg bags, jumbo bags, or bulk containers/trucks. Keep dry, clean, and away from direct sunlight, heat, and contamination. No special dangerous-goods classification applies; standard industrial handling and transport are suitable. |
| Storage | Store Idemitsu HDPE CALP G-185 in a cool, dry, well-ventilated area, away from direct sunlight, heat, ignition sources, and strong oxidizers. Keep original containers sealed, clean, and palletized off the floor. Prevent moisture, dust, and contamination. Inspect packaging regularly, rotate stock, avoid prolonged exposure to elevated temperatures. Use first-in, first-out inventory. Follow local regulations and SDS recommendations. |
| Shelf Life | Typically 24 months from date of manufacture when stored cool, dry, sealed in original packaging, away from sunlight; confirm with supplier. |
On an accumulator-head blow molding line dedicated to 200 L tight-head drums, Idemitsu HDPE CALP G-185 is converted as a high-melt-strength single-layer parison with no pre-drying at ambient relative humidity below 60%; above this threshold, hopper condensation rather than hydrolytic degradation is controlled by jacketed feeding at 40 °C. The relevant compliance boundary for the finished drum is ADR/RID 6.1.5 and the UN Manual of Tests and Criteria, Part III, using drop tests at −18 °C and hydraulic pressure testing at 100 kPa for UN marking as 1H1/Y1.5/200; batch environmental stress crack resistance is screened under ASTM D1693-21, Condition B. Formulation loading is set at 100 parts by mass CALP G-185, 10–20 phr clean in-house regrind, 1.5–3.0 phr color masterbatch, and 0.15–0.40 phr hindered amine light stabilizer where open-yard storage is specified; a fluoropolymer process aid at 0.02–0.08 phr is added only after visual confirmation of melt fracture on the parison surface. Downstream production proceeds on a single-station accumulator-head machine with a 90–120 mm screw, 24:1–30:1 L/D, barrel profile 170–200 °C, accumulator head temperature 185–200 °C, mold temperature 10–20 °C, blow air 0.7–0.9 MPa, and shot weight 9–10 kg; parison programming reduces wall-thickness variation to under 0.5 mm across the drum sidewall. The terminal article is a 200 L tight-head HDPE drum with a wall thickness of 2.5–4.0 mm for UN-certified transport of lubricants, non-solvent industrial liquids, and water-miscible chemical formulations.
When Six-Layer Fuel Tank Coextrusion Encounters Parison Sag
Regulatory acceptance for automotive fuel tanks produced from CALP G-185 follows UN ECE R34.03 fire-risk requirements and, for North American validation, FMVSS 301 fuel system integrity testing. The formulation is not a single-phase compound but a six-layer structure: inner and outer HDPE layers use CALP G-185 at 25–35 wt% each, regrind is isolated in a buried layer at 20–40 wt%, adhesive tie resins account for 1.5–2.5 wt% per layer, and a 2.5–4.5 wt% EVOH barrier layer is positioned between the tie layers; carbon black masterbatch in the outer layer is controlled at 1.0–2.5 wt% to stabilize UV exposure without sacrificing weld-line impact. Coextrusion is performed on a six-layer accumulator-head machine with 60–80 t clamp force, 210–235 °C melt temperature at the die, 12–18 °C mold cooling, and parison programming of 5–12% total wall variation; the EVOH layer must remain below 235 °C for less than 10 min residence time to avoid crosslinking and die buildup, while excessive parison sag above 8% length increase shifts the layer distribution and opens permeation paths at pinch-off seams. The terminal article is a 40–80 L coextruded automotive fuel tank with hydrocarbon permeation measured under SAE J1737; published data for this specific configuration is limited where sub-zero impact validation requires batch-specific Charpy testing under ISO 179-1:2020 at −40 °C.
| Layer function | Mass fraction | Material and processing constraint |
|---|---|---|
| Outer HDPE | 25–35 wt% | CALP G-185 plus 1.0–2.5 wt% carbon black masterbatch |
| Regrind | 20–40 wt% | Buried layer; must not contact fuel or EVOH directly |
| Tie adhesive | 1.5–2.5 wt% per layer | Two layers; retained for EVOH adhesion |
| Barrier | 2.5–4.5 wt% | EVOH; keep below 235 °C for less than 10 min |
| Inner HDPE | 25–35 wt% | CALP G-185; direct fuel contact layer |
Agrochemical Barrier Bottles: Fluorination Versus EVOH in Solvent-Borne Formulations
For 1–5 L agrochemical bottles, CALP G-185 is selected for high environmental stress crack resistance during storage of emulsifiable concentrates and solvent-borne pesticides. Container compliance follows EPA 40 CFR Part 156 registration data requirements in the United States and UN 1H1/Y packaging certification where the filled bottle is shipped as an inner receptacle; the barrier requirement is satisfied by post-molding fluorination rather than EVOH coextrusion because the bottle geometry and cost structure do not support a six-layer parison. The formulation is 100 parts by mass CALP G-185, clean regrind capped at ≤15 wt% to prevent batch-to-batch ESCR drift, 0.3–0.6 wt% hindered amine light stabilizer, 0.08–0.20 wt% phenolic antioxidant, and 2–5 wt% pigment masterbatch; fluorination is not a melt-phase additive but a post-treatment converting surface polyethylene to a fluorocarbon barrier layer at 0.5–2.0% fluorine by XPS, depending on solvent aggressiveness. The production process uses shuttle blow molding machines with 60–80 mm screws, 25:1 L/D, mold cavitation of 4–12 cavities, melt temperature 185–210 °C, mold temperature 8–18 °C, and inline deflash followed by secondary fluorination in a closed reactor at 25–50 °C; bottle weight variance is controlled below ±0.3 g to maintain drop-impact consistency. The finished article is a 1–5 L HDPE agrochemical bottle for insecticides, fungicides, and adjuvants, with the fluorinated surface layer restricting solvent permeation and reducing panel distortion.
1000 L intermediate bulk container inner liners are converted from CALP G-185 under ADR Chapter 6.5.2 for rigid plastic IBCs and UN 31H1/Y marking. The compound consists of 100 parts by mass CALP G-185, 15–25 wt% regrind generated from deflashed top and bottom sections, 3–8 wt% antistatic masterbatch for solvent vapor atmospheres, 0.20–0.50 wt% UV stabilizer, and 2–4 wt% color masterbatch. The liner is blow molded on a large accumulator-head line with 120–150 mm screw diameter, 28:1 L/D, 14–18 kg shot weight, 80–100 t clamp force, 170–200 °C barrel profile, 12–20 °C mold temperature, and cycle time of 5–8 min; cooling air is introduced immediately after full mold expansion to bring the interior surface below 70 °C before demolding, reducing sag-induced wall thinning at the bottom corner radius. The terminal article is a 1000 L UN-certified rigid plastic IBC inner container with a nominal wall thickness of 2.5–4.0 mm, used for liquid chemicals, hazardous UN Class 3 and Class 8 liquids when fitted with a certified valve closure, and non-food industrial intermediates requiring antistatic dissipation.
What Governs Environmental Stress Crack Resistance in 1,250 L Stationary Water Storage Tanks?
Stationary water storage tanks blow molded from CALP G-185 are governed by creep rupture and environmental stress crack resistance under hydrostatic pressure rather than impact alone. Compliance for potable water contact is evaluated under NSF/ANSI 61, EU Directive (EU) 2020/2184 for materials in contact with drinking water, and AS/NZS 4020 where applicable; dimensional stability is controlled to EN 12573-1:2000 welded thermoplastics tank requirements. The formulation uses 100 parts by mass CALP G-185, 2.0–2.5 wt% carbon black masterbatch with a primary particle size below 25 nm for UV shielding, 0.20–0.40 wt% primary antioxidant, and 0.30–0.60 wt% hindered amine light stabilizer; antifoaming or slip agents are excluded because they reduce weld-line strength at the tangential pinch-off. Production is carried out on a large-platen extrusion blow molder with 100–150 t clamp force, 8–15 kg shot weight, die temperature 185–210 °C, mold temperature 10–25 °C, and internal air pressure 0.5–0.7 MPa; the parison is programmed to deliver 4–6 mm wall thickness at the base corners and 2.5–3.5 mm on the cylindrical sidewall. The finished product is a 1250 L vertical or horizontal water storage tank with a design service life of 15–20 years in non-pressurized installation; published data for this specific configuration is limited when submerged surge pressures exceed 50 kPa.
Low-Temperature Impact Retention in Blow-Molded Marine Buoy Shells
Marine buoy shells and industrial flotation bodies are blow molded from CALP G-185 when sectional density and low-temperature ductility determine service life in cyclic wave loading. The applicable certification for the finished buoy is product-specific verification under ISO 15085:2003 for impact resistance of small craft parts and classification society rules where fitted to registered vessels; ultraviolet stabilization is validated by ISO 4892-2:2013 weathering exposure for 1000 h with color change and retained Charpy impact reported. The formulation is 100 parts by mass CALP G-185, 0.50–1.00 wt% high-molecular-weight hindered amine light stabilizer, 2.0–2.5 wt% carbon black masterbatch, and 0.10–0.20 wt% processing antioxidant; no external impact modifier is added because the base resin’s high-molecular-weight fraction provides the required Charpy notched impact strength, with batch validation under ISO 179-1:2020 at −20 °C. The blow molding process uses an accumulator-head machine with 80–100 t clamp force, 7–12 kg shot weight, melt temperature 180–210 °C, mold temperature 8–15 °C, and double-wall blow molding with internal ribs; shell thickness is maintained at 3–5 mm to provide impact resistance and buoyancy reserve. The terminal article is a 0.3–2.0 m diameter marine buoy or float shell filled with closed-cell polyurethane foam after shell fusion, used in aquaculture, mooring, and sediment dredging marker systems.
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- Idemitsu HDPE CALP G-185 is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: admin@ascent-chem.com.
Idemitsu HDPE CALP G-185 is a high-density polyethylene extrusion coating grade supplied by Idemitsu Kosan Co., Ltd. within the CALP coating and laminating series. The product is intended for single-layer and coextrusion coating or lamination of paper, paperboard, and aluminum foil webs. Manufacturer-published typical values list melt flow rate at 18.5 g/10 min when determined at 190 °C under a 2.16 kg load according to ISO 1133-1:2022; density at 0.954 g/cm³ according to ISO 1183-1:2019; and melting peak temperature at 132 °C by differential scanning calorimetry according to ISO 11357-3:2018. Tensile yield stress and tensile elongation for this density class are commonly reported in the range of 24 MPa to 29 MPa and above 600 % when tested according to ISO 527-3:2018, but converter-facing documents should be consulted for lot-specific values.
The grade combines high melt fluidity with elevated crystalline density. It is designed for high-speed extrusion coating where a thin polyethylene layer must be applied with controlled melt curtain stability. Unlike general-purpose HDPE blow molding or film grades with melt flow rates below 1.0 g/10 min, CALP G-185 has sufficient draw-down capability for coating weights typical of flexible packaging and paperboard lamination. No separate pre-drying is normally required for pellets removed from unopened, undamaged packaging. Pellets exposed to humid air may be dried with dehumidified air at 70 °C for 2 h to 4 h.
What distinguishes this grade from conventional LDPE extrusion coating and general-purpose HDPE?
Relative to conventional LDPE extrusion coating grades with density 0.917 g/cm³ to 0.924 g/cm³ and melting point 106 °C to 112 °C, CALP G-185 carries a higher crystalline fraction and a melting point of 132 °C. The higher density increases tensile yield stress and reduces moisture vapor transmission through the coating, but it also reduces optical clarity and raises the minimum sealing temperature. These differences make the grade more suitable for coated paperboard structures that experience warm folding, hot-fill, or short-duration heat exposure during converting.
General-purpose HDPE grades with melt flow rates below 1.0 g/10 min cannot be processed into stable thin melt curtains at commercial coating line speeds. The melt flow rate of 18.5 g/10 min places CALP G-185 within the extrusion-coating viscosity window, allowing it to be drawn down to thin coating layers without excessive screw back pressure or melt curtain sag. In a coextruded laminate, CALP G-185 may serve as the heat-resistant outer layer or as a bulk layer contributing stiffness and moisture resistance while a separate barrier resin provides oxygen or aroma control.
Neck-in is lower than that of branched LDPE at comparable melt temperatures and coating speeds. Class-typical extrusion coating literature indicates that HDPE coatings can reduce neck-in by approximately 30 % to 50 % relative to LDPE, although the exact value depends on die width, air gap, melt temperature, and chill roll distance. This lower neck-in permits narrower coating margins on lightweight papers and enables higher web utilization on wide coating lines.
Extrusion coating with CALP G-185 is performed on single-screw extruders having a screw length-to-diameter ratio from 24:1 to 30:1, typically with a barrier screw and a grooved feed section. Barrel temperature profiles are set from 180 °C to 200 °C in the feed zone, 230 °C to 260 °C in the compression and metering zones, and 280 °C to 320 °C at the adapter and die. Melt temperature at the die lips is maintained between 260 °C and 320 °C. Operation in the upper portion of this range promotes oxidative surface treatment of the melt curtain, which contributes to adhesion on paper and aluminum foil.
Die gap settings from 0.5 mm to 0.8 mm are common. Air gap distance is normally held between 100 mm and 250 mm to balance melt oxidation time against neck-in and draw instability. Chill roll surface temperature is maintained at 15 °C to 30 °C to quench the semicrystalline coating. Line speeds may reach 100 m/min to 250 m/min depending on coating weight, substrate thermal stability, and web width. Melt pressure at the screw tip is generally controlled between 10 MPa and 25 MPa with screen packs of 100/120/200 mesh; a pressure increase above 25 MPa typically indicates gel accumulation or screen blockage.
Adhesion to polar substrates depends on surface oxidation of the molten film. Low melt temperature below 260 °C can produce insufficient oxygenated species at the melt surface and reduce bond strength. Corona discharge or ozone treatment applied to the melt curtain raises peel strength on primed paperboard and foil. Peel strength of HDPE coatings on primed paperboard, measured by T-peel according to ASTM D1876, is commonly reported between 1 N/15 mm and 3 N/15 mm, though published data specific to this grade are limited.
Crystalline fraction, water vapor transmission, and heat tolerance in coated paperboard
The density of 0.954 g/cm³ corresponds to a crystalline weight fraction of approximately 70 % when calculated from a two-phase model using amorphous and crystalline phase densities of 0.855 g/cm³ and 0.997 g/cm³. This crystalline network reduces equilibrium water vapor permeability. For a 25 µm HDPE layer tested at 38 °C and 90 % RH, class-typical water vapor transmission rates fall between 4 g/m²·day and 8 g/m²·day by ASTM F1249 or ISO 15106-3. Under comparable conditions, a conventional LDPE coating of the same thickness may transmit approximately 15 g/m²·day to 20 g/m²·day.
This moisture resistance is useful for reducing water vapor ingress into paperboard packages, but the coating remains semicrystalline and is not a replacement for aluminum foil, PVDC, or EVOH in aroma-sensitive or oxygen-sensitive products. In multi-layer laminates, CALP G-185 contributes moisture resistance, stiffness, and heat resistance while a separate layer supplies oxygen barrier. The crystalline melting point of 132 °C permits short-duration exposure to hot filling or warm folding operations, provided the coated paperboard is not held above the resin softening point for a prolonged period.
| Property and method | Idemitsu HDPE CALP G-185 | Class-typical LDPE extrusion coating | Class-typical general-purpose HDPE |
|---|---|---|---|
| Melt flow rate, 190 °C/2.16 kg, ISO 1133-1:2022 | 18.5 g/10 min | 4–15 g/10 min | 0.2–1.0 g/10 min |
| Density, ISO 1183-1:2019 | 0.954 g/cm³ | 0.917–0.924 g/cm³ | 0.950–0.960 g/cm³ |
| Melting peak, ISO 11357-3:2018 | 132 °C | 106–112 °C | 128–135 °C |
| Tensile yield stress, ISO 527-3:2018 | 24–29 MPa, class-typical | 8–12 MPa | 24–29 MPa |
| Tensile elongation at break, ISO 527-3:2018 | >600 %, class-typical | 300–700 % | >600 % |
The values listed for CALP G-185 are manufacturer-published typical data or class-typical ranges. Ranges for other polymer classes are drawn from extrusion coating and polymer property literature and are not product-specific guarantees.
Food-contact converters usually evaluate CALP G-185 under the olefin polymer provisions of FDA 21 CFR 177.1520(c) and the overall migration limits of EU 10/2011. These regulations apply to the finished article rather than the resin alone. The converter must verify that print primers, inks, and adhesives do not raise migration above the applicable limit. For industrial packaging not intended for food contact, RoHS 2011/65/EU and REACH 1907/2006 substance declarations are available from the pellet supplier. Published data specific to this grade in direct food-contact migration are limited.
When high-speed laminators expose the melt to thin-film draw limits
At coating weights below 15 g/m², the melt curtain may enter a draw resonance regime if extruder output and line speed are not matched. Draw resonance appears as alternating thick and thin bands in the machine direction. It can be suppressed by increasing melt temperature to 310 °C to 320 °C, reducing air gap, or increasing die gap. However, continuous operation at 320 °C may increase oxidative gel formation. On coating lines equipped with 65 mm extruders, a pressure increase beyond 25 MPa across a 100/120/200 mesh screen pack usually indicates the need to change screens or reduce barrel temperature.
The stable processing window contains a melt-temperature conflict: adhesion and draw stability improve with heat, while gel formation and odor risk increase. Edge neck-in is aggravated by long air gaps above 250 mm and by melt temperatures below 260 °C. Production-scale edge tearing has been observed when chill roll temperature is below 10 °C because the quenched edge is too stiff for trimming at high line speed. Maintaining the chill roll between 15 °C and 30 °C avoids this condition. In coextrusion with temperature-sensitive barrier resins such as EVOH or PVDC, the converter must verify that the high melt temperature required for HDPE does not degrade the adjacent resin in the feedblock or die. Published data specific to this grade in high-temperature coextrusion with EVOH or PVDC are limited.
In paper and paperboard laminates, the grade is applied as a continuous coating layer of 12 g/m² to 25 g/m² on bleached board, kraft paper, and paper used in hot-melt and moisture-barrier packaging. Production equipment with chill roll diameter of at least 600 mm is generally required because the crystalline melt solidifies rapidly. Smaller chill rolls may not remove sufficient heat at line speeds above 150 m/min. The coated surface can be corona treated to improve printing, sealing, or subsequent adhesive lamination.
