High Puncture & Tear Resistance, Stable High-Speed Blown Film with Minimal Breakage | ChinaCoal 7042 LLDPE for Functional Films
ChinaCoal 7042 is a virgin film-grade LLDPE manufactured by ChinaCoal Ordos. Produced through gas-phase fluidized bed polymerization, it features uniform molecular structure with no additional additives. Balanced melt flow and melt strength ensure stable bubble operation and wide processing latitude for efficient film production. This resin provides excellent toughness, puncture resistance, tear strength and low-temperature crack resistance. Compliant with food contact standards, it is widely used for stretch wrap, bubble films, heavy-duty bags and agricultural films. Supported by stable domestic supply and high cost performance, it is an ideal raw material for functional film manufacturing.
1. Basic Product Specifications
All figures listed are typical values for reference only. This product uses 100% virgin milky white pellets with uniform shape, free of impurities, black specks and deformed particles, so performance stays consistent across every batch. Goods come in original 25kg factory bags, and each batch is accompanied by an official COA to track full quality inspection records.
Density: 0.918–0.922 g/cm³ (ISO 1183)
Melt Flow Rate (190°C/2.16 kg): 2.0 g/10min (ISO 1133, typical reading)
Haze: ≤14% (30 μm film, typical value: 12.5%)
MD Tear Strength: ≥85 kN/m (ISO 6383-2)
TD Tear Strength: ≥80 kN/m (ISO 6383-2)
Tensile Yield Strength: ≥8.0 MPa
Tensile Breaking Strength: ≥12.0 MPa
Elongation at Break: ≥700%
Melting Point: 121°C
2. Core Product Advantages
Uniform molecular structure for smooth processing, fewer bubble breaks
Even C6 hexene side chains and narrow molecular weight distribution create well-balanced melt strength. Bubbles stay stable and film thickness remains consistent even during high-speed production, drastically cutting bubble rupture issues. The resin fits both single-layer and three-layer co-extrusion machines, supporting stable output of films ranging from 12 μm to 100 μm and lowering scrap rates.
Superior toughness & puncture resistance, reliable low-temperature impact performance
Compared with standard LDPE, its linear molecular framework delivers better tear strength, puncture resistance and stretch elongation, allowing stable pre-stretching for stretch wrap products. It also offers strong low-temperature resistance and good resistance to environmental stress cracking, preventing film breakage and extending service life for heavy-duty sacks and equipment inner liners.
Low gel count & low ash content, great compatibility for printing and lamination
Strict control over gel particles and ash content results in clean film surfaces with minimal fish eyes and no surface precipitates. Ink adheres firmly during printing, and lamination bonds hold steady. No extra corona treatment is needed for printing, coating and dry lamination steps, simplifying all secondary processing work.
Stable domestic supply, flexible blending for all film types
This mainstream domestic LLDPE grade has consistent, ample bulk stock available year-round. It carries little odor and satisfies food contact regulations, and holds up against daily chemical corrosion. Users can run it alone or mix it with LDPE to adjust film softness and transparency to fit different packaging use cases.
3. Main Application Fields
Stretch Wrap Films: Machine stretch wrapping film, hand-use stretch wrap
Industrial Functional Films: Air bubble cushion film, base film for clear adhesive tape, heavy-duty inner packaging bags
Daily Packaging Films: Household garbage bags, thick express delivery packaging films, fresh food storage bags
Agricultural Films: Farm mulch film, standard greenhouse covering film
Other Applications: Base material for blended film modification; mix with LDPE to adjust film softness and light transmission
4. Processing & Storage Guidelines
Processing Parameters
Barrel Temperature: 160–190°C
Important Reminder: This linear LLDPE has a relatively high melting point. Tune heating temperatures based on your actual machine setup to avoid thermal degradation from overheating.Die Temperature: 180–200°C
Blow-up Ratio (BUR): 2.0–3.2, adjust to match your production targets
Frost Line Height: 5–7 times the die diameter
Drying Guidance: Pellets stored under normal conditions require no drying. If raw materials absorb moisture, bake them at 60–70°C for 1 hour and cool fully to room temperature before feeding into the extruder.
Storage Requirements
Store pellets inside cool, dry, well-ventilated warehouses. Keep material away from open flames, rain, direct sunlight and strong-smelling goods to stop moisture absorption and odor transfer. Do not stack pallets higher than 5 layers. Under standard storage conditions, the shelf life is 2 years.
5. Quality Assurance & Supply Service
All products we supply are 100% genuine virgin ChinaCoal 7042 LLDPE from the factory. We provide an original batch COA for full indicator verification upon request. We hold large volumes of domestic spot stock all year long, and support free sample testing, small trial orders, full-truck and full-container bulk shipments. Our technical team offers ongoing professional support to resolve all production and sourcing needs for film manufacturers.
6. Frequently Asked Questions
Q1: What edges does ChinaCoal 7042 have over LDPE when making stretch wrap film?A: At equal film thickness, this LLDPE has much stronger puncture and tear resistance, supports higher stretch ratios and holds heavier loads. Its high melt strength prevents bubble breaks on fast production lines, letting you run continuous stable output.
Q2: How well does this grade control fish eyes and impurities? Is it suitable for adhesive tape substrates?A: It has low ash content and very few gel specks, resulting in ultra-clean film surfaces with barely any fish eyes. It bonds well with acrylic adhesives and maintains stable peel strength after coating, making it an ideal pick for clear tape and bubble film base materials.
Q3: How does batch consistency compare between ChinaCoal 7042 and 7042 grades from other manufacturers?A: The fixed gas-phase fluidized bed production process keeps hexene comonomer dosing consistent, so performance stays uniform batch after batch. Factories won’t need constant machine parameter tweaks during mass production, and scrap rates stay steady.
Q4: What blending ratio works best when mixing with LDPE?A: Using pure 7042 delivers the maximum toughness. If you want softer, clearer films, mix in 20% to 30% LDPE to strike a good balance of rigidity, transparency and processability.
Q5: How fast can you deliver domestic orders, and what technical aftersales support do you provide?A: We ship directly from domestic factory stock for quick delivery, with no port waiting delays. Our technicians share recommended processing parameters and troubleshoot common issues such as uneven film thickness and frequent film breakage.
7. Product Summary
ChinaCoal 7042 is a high-toughness domestic LLDPE for film blowing. It offers stable bubble performance, superior mechanical strength and low fish eyes, supporting reliable printing and lamination. Food-contact safe and suitable for high-speed film lines, it features stable domestic supply and cost advantages. Ideal for stretch wrap, bubble films, heavy-duty packaging and agricultural films.
Get in touch with us to receive complete technical datasheets, compliance certification documents, original COA reports, free material samples and up-to-date bulk pricing quotations.
