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Sinopec Maoming DNDA-7144 is a linear low-density polyethylene (LLDPE) resin produced by the gas-phase process. It is characterized by high tensile strength, excellent puncture resistance, and superior optical properties. This grade is primarily designed for high-performance film extrusion and packaging applications. Technical Data Sheets (TDS) are available upon request.
| Manufacturer | SINOPEC Maoming |
|---|---|
| Density | 0.92 g/cm³ |
| MFR | 18 g/10min |
| MVR | 25 cm³/10min |
| Elongation at Break | > 500 % |
Note: See the product description for additional technical specifications
SINOPEC Maoming DNDA-7144 is a high-grade Linear Low-Density Polyethylene (LLDPE) resin manufactured by the SINOPEC Maoming branch. Due to its unique molecular structure, this grade maintains the robust mechanical strength of LLDPE while exhibiting exceptional clarity and electrical insulation properties comparable to premium LDPE.
As a professional resin material plastic wholesaler in china, ZiJun Plastics provides original virgin DNDA-7144 granules. With extensive industry expertise, we offer global customers a stable supply chain and expert technical consultation.
Key Selling Points:
Superior Transparency: Extremely low fish-eye levels, providing excellent visual clarity for finished products.
Excellent Electrical Properties: Low dielectric loss makes it an ideal choice for wire and cable insulation applications.
High Flowability & Easy Processing: A high Melt Flow Rate (MFR) of 18g/10min allows for rapid-cycle injection molding production.
For engineers and technical procurement specialists, precise data is the core of production stability. Below are the typical physical properties of DNDA-7144:
| Properties | Test Conditions | Typical Value | Test Standards |
| Density | 23°C | 0.92 g/cm³ | ISO 1183 |
| Melt Flow Rate (MFR) | 190°C / 2.16kg | 18 g/10min | ISO 1133 |
| Melt Volume-Flow Rate (MVR) | 190°C / 2.16kg | 25 cm³/10min | ISO 1133 |
| Properties | Test Conditions | Typical Value | Test Standards |
| Tensile Yield Stress | 50mm/min | 11 MPa | ISO 527 |
| Elongation at Break | 50mm/min | > 500 % | ISO 527 |
| Flexural Modulus | 2mm/min | 240 MPa | ISO 178 |
| Izod Notched Impact Strength | 23°C | NB (No Break) | ISO 180/1A |
| Shore Hardness (Shore D) | — | 48 | ISO 868 |
| Properties | Test Conditions | Typical Value | Test Standards |
| Vicat Softening Temperature | A50 (10N) | 92 °C | ISO 306 |
| Heat Deflection Temp (HDT) | 0.45MPa | 42 °C | ISO 75 |
| Melting Temperature | — | 121 °C | ISO 11357 |
The high-performance characteristics of DNDA-7144 allow it to excel across several critical industries:
Packaging Industry:
High-End Food Container Lids: Utilizes high transparency and toughness to produce lids that are easy to open and visually clear.
Household Transparent Packaging: Suitable for thin-walled injection molding of clear storage boxes and cosmetic packaging.
Electronics & Electrical:
Wire & Cable Insulation: Its superior electrical properties make it ideal for communication cables or low-voltage insulation layers.
Electronic Component Protection: Provides a strong physical barrier with excellent insulation.
Industrial Applications:
High-Flow Molded Parts: Suitable for complex-structured and thin-walled industrial accessories, ensuring complete cavity filling.
Understanding the differences between DNDA-7144 and conventional grades is essential for making informed procurement decisions:
| Dimension | DNDA-7144 (LLDPE) | Conventional LDPE (High-Pressure) |
| Mechanical Strength | Higher: Superior puncture and tensile resistance | Lower: Relatively softer material |
| Transparency | Excellent: Top-tier performance within the LLDPE family | Excellent: The traditional strength of LDPE |
| Melting Point | Higher (~121°C): Better heat resistance | Lower (~105-110°C) |
| Typical Applications | Cable insulation, Thin-wall clear parts | General cling films, extruded soft tubes |
To ensure DNDA-7144 performs optimally on your production line, we recommend the following processing parameters:
Drying: PE materials generally have very low water absorption. However, in high-humidity environments, we recommend drying at 70°C – 80°C for 1 hour to prevent surface bubbles or silver streaks.
Injection Temp: The suggested range is 180°C – 230°C. Given its high flowability, injection pressure can be adjusted lower as needed.
Mold Temp: Recommended to maintain between 20°C – 50°C. Lower mold temperatures help shorten the molding cycle and enhance final transparency.
Pro Tip: Due to the relatively high shrinkage rate (typically 1.5% – 3.0%), dimensional compensation should be carefully considered during mold design.
Q1: Why is SINOPEC DNDA-7144 better suited for injection molding than standard LLDPE?
A: The key lies in its high Melt Flow Rate (MFR) of 18. While standard LLDPE film grades (like 7042) typically have an MFR around 2, the high flowability of 7144 allows it to easily fill complex mold cavities, significantly increasing production efficiency.
Q2: Does this material comply with environmental certifications?
A: Yes. SINOPEC-produced DNDA-7144 complies with REACH and RoHS environmental standards. For specific testing reports (COA/SGS), please contact ZiJun Plastics.
Q3: Why choose ZiJun Plastics for sourcing DNDA-7144?
A: We offer not only competitive pricing but also 100% genuine virgin granules guaranteed. Our professional logistics team ensures your cargo is delivered safely and on time worldwide.
