Chengnuo supplies Daqing 2420D, a virgin LDPE blown film grade from PetroChina Daqing Petrochemical, to film makers who need a high clarity LDPE resin for greenhouse cover production. Hazy film wastes sunlight, and weak film tears in the first strong wind. Daqing 2420D gives a clean, high melt strength base that blows into wide, even sheets. Planning a greenhouse film run? Talk to Chengnuo about Daqing 2420D grade fit, formulation advice and bulk supply.
Selecting Daqing 2420D LDPE Resin for High-Clarity Greenhouse Film
Low Haze, More Usable Sunlight
Haze below 14% on 50 μm film lets more direct light reach the crop.
High Melt Strength for Wide, Even Bubbles
Stable bubbles give an even gauge, so no thin strips that tear first on the roof arch.
Toughness Built for Wind and Handling
250 g dart impact on 50 μm film helps covers survive fixing and storm loads.
A Clean Base for Greenhouse Additives
Works well as the base for UV stabilizer and anti-fog masterbatch, with additive levels set for local climate.
Daqing 2420D Technical Data for Greenhouse Film Extrusion
| Parameter | Value & Test Condition |
|---|---|
| Material Type | Low-density polyethylene (LDPE), virgin pellets, high-pressure tubular process |
| Melt Flow Rate (MFR) | 0.25–0.32 g/10 min (190 ℃, 2.16 kg, ISO 1133) |
| Density | 0.923 g/cm³ (ISO 1183) |
| Vicat Softening Temperature | 94 ℃ (ISO 306) |
| Tensile Strength at Break (MD / TD) | 27 MPa / 20 MPa (ISO 527) |
| Elongation at Break (MD / TD) | 200% / 500% (ISO 527) |
| Dart Impact Strength | 250 g (50 μm film, ASTM D1709) |
| Haze | < 14% (50 μm film, ASTM D1003) |
| Recommended Processing Method | Blown film extrusion, single layer or as a layer in multilayer film |
| Suggested Melt Temperature | 170–200 ℃ |
| Package Net Weight | 25 kg per bag |
Line Notes from the Film Floor
Even a high clarity LDPE resin for greenhouse cover film needs the right line setup. Stay inside the suggested melt window, and remember that haze grows with thickness and additive loading, so a 150 μm sheet reads hazier than the 50 μm test value. The low melt flow rate also means higher motor load and head pressure. See our Daqing 2420D LDPE blown film resin purchasing guide for the buyer-side view.
Daqing 2420D's Work Place as a High Clarity LDPE Resin for Greenhouse Cover Film
Roof Covers for Single-Span and Multi-Span Greenhouses
Outer or monolayer film for vegetable, flower and fruit houses where light comes first.
Wide sheets that need an even gauge from edge to edge.
Walk-In Tunnels and Low Tunnel Covers
Seasonal film for strawberries, leafy greens and early spring planting.
Thinner gauges that still need puncture strength at the hoops.
Blended and Multilayer Greenhouse Film
2420D-rich outer layer for clarity, LLDPE or mLLDPE core for toughness.
Inner layer with anti-fog masterbatch in double-film systems.
Greenhouse Film Resin Questions Answered: Daqing 2420D in Practice
1. How should Daqing 2420D be blended with LLDPE or mLLDPE in a greenhouse film recipe?
Use 2420D for clarity and bubble stability, and LLDPE for tear and puncture strength. In a three-layer film, put more 2420D in the outer layer and more LLDPE in the core. Treat any ratio as a trial starting point.
2. Which line settings protect clarity when blowing wide-width greenhouse film with Daqing 2420D?
Keep melt temperature inside the suggested window, hold cooling air steady so the frost line does not drift, and keep the die lip and screen packs clean. Hazy streaks often come from the line, not the resin lot.
3. Is LDPE film a good choice for a small greenhouse compared with EVA or PO film?
Yes for small or seasonal houses. LDPE film is clear, easy to patch and costs less. EVA and PO hold heat better and last longer, but cost more and suit larger year-round houses.
4. How should a new batch of Daqing 2420D be checked before a full greenhouse film run?
Blow a short trial roll at your usual gauge and compare haze, gel spots, bubble stability and thickness spread with a retained sample from a good lot.
Bring Your Greenhouse Film Formula to Chengnuo and Start Blowing Clearer Film
Chengnuo works with film producers on project-based orders, from first trial rolls to repeat bulk wholesale of a high clarity LDPE resin for greenhouse cover film. Send us your film structure, gauge and target climate, and we will match Daqing 2420D to it.
More detail: Daqing 2420D selection guide.
