PE-Dow DOWLEX 2045G
PE-Dow DOWLEX 2045G ist ein von Dow entwickeltes Hochleistungs-LLDPE-Octen-Copolymer (lineares Polyethylen niedriger Dichte), das für seine außergewöhnliche Reißfestigkeit und Durchstoßfestigkeit bekannt ist. Mit einer Dichte von 0,920 g/cm³ und einem Schmelzindex von 1,0 g/10 min wird diese Sorte häufig für Industrieauskleidungen, hochfeste Verschlüsse und schützende Sekundärverpackungen verwendet, die extreme mechanische Haltbarkeit erfordern. Jucheng Precision, unter den Qualitätsrahmen von ISO 9001 und IATF 16949, ist auf das Formen von DOWLEX 2045G spezialisiert, um eine hohe strukturelle Haltbarkeit zu erzielen. Mit unseren über 35 fortschrittlichen Spritzgießpressen und Fünf-Achs-Werkzeugen kontrollieren wir die hohe Kristallisationsschrumpfung ohne Verzug, verifiziert durch Zeiss-Koordinatenmessmaschinen-Prüfung.
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:
| Mechanische Eigenschaft | 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. |
| Zugdehnung | Ultimate Elongation 800% | Demonstrates extreme elastic stretching capability without tearing, perfectly suited for snap-fit joints and high-deformation components. |
| Thermische Erweichung | 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:
| Prozesskategorie | 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- & Umspritzen | 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.
- Schmelz- und Formtemperaturregelung: 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.
Eigenschaften
| Dichte | 0.920 g/cm³ |
| Schmelzflussindex (MFR) (190°C/2,16 kg) | 1.0 g/10 min |
| Zugfestigkeit bei Streckgrenze | 11.5 MPa |
| Zugfestigkeit (Bruch) | 52.0 MPa |
| Zugdehnung beim Bruch | 800 % |
| Film Puncture Energy | 19.0 J/cm³ |
| Dart Drop Impact | 288 g |
| Gloss (45°) | 60 % |
| Haze | 10 % |
| Vicat-Erweichungspunkt | 108 °C |
| Schmelztemperatur (DSC) | 122 °C |
| Linearer Formschwund | 1.5 - 2.5 % |
| Maximale Bauteilgröße | 800 x 600 mm |
| Mindestbauteilgröße | 1 x 1 mm |