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Product Overview
The Inner Lining Bag Composite Drums manufactured by Wuxi Sifang Youxin Co., Ltd. combine the mechanical strength of high-quality steel drums with the purity and flexibility of plastic liners, delivering a dual-protection packaging solution for industries handling sensitive, high-purity, or corrosive materials.
Each drum features a durable steel shell as the outer layer and a customized inner lining bag made from polyethylene (PE), polypropylene (PP), or other specialized polymer films. This hybrid design ensures superior contamination protection, leak prevention, and product purity while maintaining the impact resistance and stackability of traditional steel drums.
These composite drums are widely used in pharmaceuticals, food, fine chemicals, adhesives, coatings, and specialty materials, where contamination control and chemical compatibility are essential.
Product Specifications
Product Type: Open-head or closed-head steel drums with internal plastic liner
Capacity Range: 50L – 230L (standard 200L, 205L, 210L, 230L)
Outer Shell Material: High-strength cold-rolled or hot-rolled carbon steel
Steel Thickness: 0.6 mm – 1.2 mm (adjustable as per product type)
Inner Liner Material Options:
PE (Polyethylene): For general liquid or semi-solid products
PP (Polypropylene): For high-temperature or solvent-resistant use
PA/PE or EVOH multi-layer films: For high barrier and gas-sensitive products
Coating (Optional): Epoxy or PVF coatings on the steel interior for added protection
Liner Thickness: 0.08 – 0.25 mm depending on application
Sealing Type:
Open-head: Detachable lid with clamp ring or bolt ring
Closed-head: Welded top with 2” and ¾” threaded openings
Compliance Standards: ISO 9001, UN packaging certification, ROHS, FDA food contact (optional)
Key Product Advantages
1.Dual-Layer Protection
The steel shell provides mechanical durability, while the inner liner ensures product purity and corrosion resistance, forming a complete dual-protection system.
2.Contamination-Free Storage
The plastic liner prevents direct contact between the product and the metal surface, effectively eliminating contamination risks caused by metal ions, rust, or coatings.
3.Chemical and Moisture Resistance
The liner materials resist acids, alkalis, solvents, and moisture, ensuring the stability of sensitive products during long-term storage and international transport.
4.Leak-Proof and Clean Design
The integrated liner and sealing ring prevent leakage or vapor permeation, maintaining a clean and hygienic packaging environment.
5.Easy Disposal and Reuse
After use, the inner liner can be easily removed and replaced, allowing the steel shell to be reused multiple times, reducing costs and environmental impact.
6.Customizable Configuration
Various liner materials, thicknesses, colors, and designs (flat bag, gusseted bag, form-fit bag) are available to meet different industry requirements.
Product Composition and Structure
1.Each Inner Lining Bag Composite Drum is composed of two main components working in synergy
Outer Steel Drum:
Provides structural integrity, impact resistance, and pressure stability.
Available in open-head and closed-head configurations.
Can include internal coatings (epoxy, PVF, or phenolic) for added chemical protection.
Inner Plastic Liner:
Acts as a chemical barrier and hygiene shield.
Materials include PE, PP, or multi-layer EVOH films for high barrier performance.
Liner can be fixed inside the drum using mechanical clips or vacuum adhesion.
2.Manufacturing Process Steps
Drum Fabrication: Rolling, welding, and forming of the steel body and ends.
Surface Treatment: Cleaning and coating of steel surfaces.
Liner Preparation: Cutting and heat sealing of film into drum-shaped liners.
Assembly: Inserting and securing liners inside steel drums.
Testing: Leak, pressure, and compatibility testing for both drum and liner systems.
Assembly and Handling
Open-Head Drums: Equipped with clamp or bolt rings for easy liner installation and removal.
Closed-Head Drums: Pre-fitted liners welded or adhered to the inside wall.
Sealing: Liner top can be heat-sealed or tied after filling for complete air isolation.
Compatibility: Suitable for both liquid and solid products, including those requiring aseptic packaging.
Stacking and Storage: Designed for safe stacking and efficient transport with minimal deformation risk.
Applications
Inner Lining Bag Composite Drums are ideal for industries requiring high cleanliness, product stability, and contamination prevention, including:
Food & Beverage Industry: Flavorings, syrups, edible oils, and dairy ingredients.
Pharmaceuticals & Biotech: APIs, intermediates, and sterile compounds.
Fine Chemicals & Adhesives: Reactive chemicals, glues, and solvents.
Paints & Coatings: Water-based and solvent-based formulations.
Cosmetics & Personal Care: Essential oils, lotions, and emulsions.
Export Packaging: Compliant with international shipping standards for hazardous and non-hazardous materials.
The combination of a rigid steel shell and flexible inner liner makes these drums particularly effective for corrosive, sensitive, or high-purity contents.
Quality Assurance
Wuxi Sifang Youxin ensures every composite drum meets stringent quality standards:
Leak and Pressure Testing: Ensures airtight and leak-proof performance.
Liner Integrity Testing: Confirms liner resistance to puncture, solvent, and heat.
Material Compatibility Testing: Validates chemical and physical compatibility with stored substances.
Salt Spray and Corrosion Testing: Evaluates long-term environmental durability.
Visual Inspection: Checks coating uniformity, liner placement, and drum finish.
All drums are manufactured under ISO 9001 certified production systems with full batch traceability.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of using inner lining bag composite drums?
They provide double protection—mechanical strength from steel and chemical purity from plastic liners—ideal for sensitive products.
Q2: Are the liners replaceable?
Yes. The liners can be easily replaced after use, allowing multiple reuse cycles of the same steel drum shell.
Q3: Can the liner be heat-sealed after filling?
Yes. For liquids or sterile products, the liner can be heat-sealed or tied to maintain complete isolation.
Q4: Are these drums suitable for export?
Absolutely. They comply with international UN packaging standards for both hazardous and non-hazardous goods.
Q5: Can the drum be customized?
Yes. Custom sizes, liner materials, colors, and logos are available to match customer needs.
Conclusion
The Inner Lining Bag Composite Drums by Wuxi Sifang Youxin Co., Ltd. offer the perfect balance of strength, safety, and cleanliness, setting a new benchmark in hybrid industrial packaging.
By integrating a robust steel structure with a high-purity plastic liner, these drums deliver exceptional performance for products requiring contamination-free storage and transport.
Environmentally friendly, reusable, and adaptable to multiple industries, these composite drums exemplify Sifang’s commitment to innovation, quality assurance, and customer satisfaction—ensuring your materials remain safe, stable, and protected from production to delivery.
