PE-Dow DOWLEX 2045G
PE-Dow DOWLEX 2045G is a high-performance linear low-density polyethylene (LLDPE) octene copolymer developed by Dow, recognized for its exceptional tear strength and puncture resistance. Featuring a density of 0.920 g/cm³ and a melt index of 1.0 g/10 min, this grade is widely utilized for industrial linings, high-strength caps, and protective secondary packaging requiring extreme mechanical durability. Jucheng Precision, under ISO 9001 and IATF 16949 quality frameworks, specializes in molding DOWLEX 2045G to yield high structural durability. Utilizing our 35+ advanced injection presses and five-axis tooling, we control its high crystallization shrinkage without warpage, verified by Zeiss CMM inspection.
DOWLEX 2045G Mechanical Resiliency & Barrier Profile
DOWLEX™ 2045G is an octene-copolymer Linear Low Density Polyethylene engineered to provide ultimate puncture resistance and extreme tear strength for structural and containment applications:
| Mechanical Attribute | DOWLEX 2045G Rating | Industrial Performance Advantage |
|---|---|---|
| Puncture Toughness | Puncture Energy 19 J/cm³ | Ensures outstanding resistibility against sharp object penetration, making it ideal for flexible structural liners and heavy-duty industrial seals. |
| Tensile Elongation | Ultimate Elongation 800% | Demonstrates extreme elastic stretching capability without tearing, perfectly suited for snap-fit joints and high-deformation components. |
| Thermal Softening | Vicat Softening Point 108°C | Retains mechanical integrity and dimensional stability at elevated temperatures compared to standard low-density polyethylenes. |
Specialized Industrial Molding Adaptability for DOWLEX 2045G
With a low melt index of 1.0 g/10 min, DOWLEX 2045G is optimized for heavy-duty components requiring extreme physical resistance:
| Process Category | Molding Compatibility & Process Execution |
|---|---|
| High-Toughness Industrial Seals | Excellent. Fully optimized for high-pressure industrial oil seals, chemical-resistant gaskets, dynamic expansion plugs, and protective caps. |
| Flexible Linings & Enclosures | High. Well-suited for heavy-duty secondary containment caps, flexible electronic protection sleeves, and high-impact containers. |
| Insert & Overmolding | Good. Allows encapsulating metal frames or rigid polymer substrates to provide local high-tear sealing profiles. |
PE-Dow DOWLEX 2045G Tooling & Melt Temperature Guide
DOWLEX 2045G has high molecular weight and a low melt index (1.0 g/10 min), which increases melt viscosity and requires tight process controls:
- Managing High Melt Viscosity: Due to its low melt index, DOWLEX 2045G requires higher injection pressures and customized runner layouts to prevent high shear stress. We design generous sprue sizes and rounded gates to facilitate smooth material entry without surface splay.
- Melt & Mold Temperature Control: Barrel temperatures are kept at 210°C–250°C (410°F to 482°F) to ensure homogeneous melting. Mold temperatures are managed between 20°C and 50°C (68°F–122°F) using pressurized cooling loops to optimize crystallization.
- Conformal Cooling & Shrinkage: Volumetric shrinkage runs from 1.5% to 2.5%. Jucheng’s tooling division uses 5-axis CNC machines to mill uniform, balanced cooling circuits directly into core and cavity inserts, preventing uneven cooling and part warping.
- Optimizing Mold Release: Because LLDPE is highly tough and can stick to mold walls, deep structural walls require highly polished draft angles (minimum 1.5° to 2°). We use premium S136 stainless steel mold cavity inserts to secure clean, scuff-free ejection.
Key Application Fields for PE-Dow DOWLEX 2045G
- Heavy-Duty Industrial Packing: High-impact industrial container linings, chemical-resistant dynamic gaskets, dynamic expansion caps, and heavy-duty logistics protectors.
- Consumer & Automotive Seals (IATF 16949): Weather-resistant protective boots, wiring harness sealing plugs, dynamic grommets, and high-impact secondary containment lids.
- Healthcare & Food Contact Packaging: FDA-compliant squeezable medical closures, food container gaskets requiring low odor, and chemical barrier enclosures.
Properties
| Density | 0.920 g/cm³ |
| Melt Mass-Flow Rate (MFR) (190°C/2.16kg) | 1.0 g/10 min |
| Tensile Strength at Yield | 11.5 MPa |
| Tensile Ultimate Strength | 52.0 MPa |
| Tensile Elongation at Break | 800 % |
| Film Puncture Energy | 19.0 J/cm³ |
| Dart Drop Impact | 288 g |
| Gloss (45°) | 60 % |
| Haze | 10 % |
| Vicat Softening Point | 108 °C |
| Melting Temperature (DSC) | 122 °C |
| Linear Mold Shrinkage | 1.5 - 2.5 % |
| Maximum Part Size | 800 x 600 mm |
| Minimum Part Size | 1 x 1 mm |