Shenhua 7042 LLDPE: Tough, Tear-Resistant Blown Film Resin for Agricultural & Heavy-Duty Packaging
Product Overview
Shenhua 7042 is a general blown film grade LLDPE resin. It has stable melt flow and high mechanical strength. It offers good tear resistance, puncture resistance and low temperature resistance. It works well with blown film and cast film machines. This resin is widely used to make agricultural films, heavy-duty packaging bags, regular packaging products and industrial inner films.
1. Basic Product Specifications
Density: 0.920 g/cm³ (range: 0.917–0.923 g/cm³)
Melt Flow Rate (190°C / 2.16 kg): 2.0 g/10min (range: 1.7–2.3 g/10min)
Tensile Yield Strength: ≥8.0 MPa (typical value: 12.0 MPa)
Tensile Breaking Strength: ≥12.5 MPa
Elongation at Break: ≥600% (typical value: ≥700%)
Haze (50μm film): ≤14%
Fish Eyes: ≤8 pieces (0.8mm) per 1520 cm²; ≤40 pieces (0.4mm) per 1520 cm²
Low Temperature Resistance: Brittleness temperature is below -70°C. It keeps high toughness in cold environments.
Additive System: Pre-added with slip agent. No antiblock agent is contained.
2. Core Product Advantages
Stable Melt Flow & Wide Equipment Compatibility
It has proper melt tension and forms stable air bubbles during production. The finished film has even thickness. It fits all types of film blowing, film casting and extrusion lines. The production runs smoothly and produces few defective goods.
Superior Mechanical Performance with High Tear & Puncture Resistance
It has better tensile strength, tear resistance and puncture resistance than ordinary LDPE. The high-strength film can bear heavy weight and is not easy to break. It is ideal for heavy-duty bags and farm mulch films.
Excellent Low-Temperature Performance & Weather Resistance for Outdoor Use
The resin stays flexible and greatly reduces cold brittle cracking risk under frigid conditions. It only contains basic antioxidant stabilizers without dedicated UV absorbers; long-term continuous outdoor greenhouse or silage film exposure requires additional UV masterbatch blending to slow photo-oxidation yellowing and aging.
Reliable Chemical Stability for Diverse Applications
It can resist acid, alkali, salt and alcohol solvents. The pellets are non-toxic and odorless. It is suitable for regular packaging and food contact packaging. Its performance remains stable after long contact with daily chemical products.
Flexible Formulation for Custom Additive Application
Only slip agent is added in advance. There is no built-in antiblock agent. Users can add different functional additives freely to adjust film performance for different production demands.
3. Detailed Application Fields
Agricultural Films: Greenhouse films, mulch films and agricultural covering films. It has high toughness, tensile strength and aging resistance, and adapts to complex farm environments.
Heavy-Duty Packaging: Heavy-duty courier bags, industrial inner bags, container bag liners and waste collection films. It features strong puncture resistance and good load-bearing capacity.
Daily & General Packaging: Supermarket shopping bags, regular packaging bags, stretch films and base films for composite materials.
Industrial Products: Small extruded pipes, common sheets, industrial protective films and other related products.
This resin can be mixed with LDPE and other LLDPE grades to improve processing performance and film strength.
4. Blown Film Processing Guidelines
Recommended Process Parameters
Barrel temperature: 150–200°C. Raise temperature gradually from feed inlet to die head.
Die head temperature: 170–210°C. Adjust the temperature according to film thickness and equipment type.
Blow-up Ratio: 2.0–3.2. Adjust the ratio based on actual working conditions.
Drying requirement: No drying is needed for normally stored pellets. Dry damp pellets at 60–70°C for 1 hour.
Blending suggestion: It can be blended with LDPE and common LLDPE. The mixture improves film stiffness and melt flow, and helps control production costs.
5. Quality Assurance & Procurement Support
Genuine product: Direct factory virgin supply. Batch official COA documents are provided for full physical indicator inspection.Standard packaging: 25kg per bag with original factory sealed woven packaging.
Storage advice: Store pellets in cool, dry and well-ventilated warehouses. Isolate from open flame, rainwater, direct sunlight and strong-odor goods to avoid moisture absorption and odor cross-contamination. Pallet stacking height shall not exceed 5 layers. Standard shelf life: 2 years under sealed dry storage conditions.
Compliance documents: Complete food contact safety reports, RoHS and REACH certification files are available to meet domestic sales and global export compliance requirements.Stable supply: Sufficient year-round spot inventory in stock, supporting small trial bulk orders and full-container mass shipments. Professional one-stop extrusion technical troubleshooting support is provided.
6. Frequently Asked Questions
Q1: How is the melt flow of Shenhua 7042? Is it suitable for high-speed blown film lines?A: It has stable melt flow and a wide processing range. It is compatible with high-speed, medium-speed and low-speed film blowing machines. The production process is steady, with no bubble shaking or frequent film breakage.
Q2: What are its strengths when used for agricultural films and heavy-duty packaging bags respectively?A: For agricultural films, it has excellent low temperature resistance and aging resistance, and strong toughness to serve longer outdoors. For heavy-duty packaging films, it features great tear resistance and puncture resistance as well as high load capacity, which effectively reduce package damage.
Q3: Can this resin be blended with other materials? What is the common blending formula?A: Blending is widely used in actual production. It is usually mixed with LDPE. The mixture improves film gloss and stiffness, optimizes processing performance, and balances product performance and cost.
Q4: What are the key notes for daily storage of the resin?A: Keep the material in cool and dry places. Stay away from open flames and odorous items. Take measures to prevent sunlight, rain and moisture. Do not stack more than 5 pallets high to keep the material in good condition.
Q5: Can this resin be used for food contact packaging films?A: It meets general food contact standards and can be used for outer packaging of common food. Do check local relevant regulations if it is used for direct contact with high-temperature or oily food.
7. Product Summary
Shenhua 7042 is a classic blown film grade LLDPE. It has stable quality, strong processing adaptability and good overall performance. It fits various usage scenarios, and users can add different functional additives easily. We keep sufficient stock and complete certification documents. It is a cost-effective and reliable raw material for film manufacturers.
Please feel free to contact us for complete technical documents, compliance certificates, free samples and bulk price quotations.
