Explore our certified solutions engineered for high performance in flammable and volatile environments.
An Industrial Whitepaper on Electrostatic Protection & Risk Mitigation
Flexible Intermediate Bulk Containers (FIBCs) are the backbone of modern dry bulk logistics. However, filling and discharging fine combustible powders can generate substantial static electricity due to friction. In hazardous operating environments, an electrostatic discharge can ignite dust clouds or ambient flammable gases, leading to catastrophic explosions. This is where antistatic bulk packaging becomes a critical safety parameter.
Type B Antistatic FIBC Bags are specifically designed to prevent the occurrence of propagating brush discharges (PBD). According to the international standard IEC 61340-4-4, the fabric of a Type B bag must exhibit a breakdown voltage of less than 6 kilovolts (kV). Unlike Type C bags, Type B bags do not rely on grounding networks, making them ideal for operations where reliable grounding is difficult to maintain or verify.
While Type B FIBCs safely prevent propagating brush discharges, they are not designed to dissipate static charges to ground. Therefore, they must not be used in the presence of flammable solvents, gases, or vapors with low Minimum Ignition Energy (MIE < 0.14mJ) unless a gas-barrier liner is utilized.
| Bag Type | Electrostatic Properties | Grounding Requirement | Safe Operating Environment | Key Exclusions |
|---|---|---|---|---|
| Type A | No electrostatic protection. Standard insulating PP fabric. | Cannot be grounded. | Non-combustible materials only. No flammable dust/vapors. | Do not use for any combustible powders. |
| Type B | Breakdown voltage of fabric < 6 kV. Prevents propagating brush discharges. | No grounding required. | Combustible powders with MIE > 3 mJ. No flammable gases. | Do not use in Zone 0, 1, or 20/21 gas environments. |
| Type C | Conductive grid yarns. Resistance to ground < 1.0 x 10^7 Ohms. | Mandatory Grounding during fill & discharge. | Combustible powders and flammable gas zones (Zone 1 & 2). | Do not use if ground connection is compromised. |
| Type D | Static dissipative fabric (e.g., Crohmiq). Dissipates charge to air. | No grounding required. | Combustible powders and flammable gas environments. | Ensure no conductive elements contact the bag ungrounded. |
A Legacy of Quality, Engineering, and Global Safety Standards since 1988
Founded in 1988, Yantai ZS Bulk Bags Manufacturing Co., Ltd. is a professional manufacturer specializing in the customized design and production of mid-to-high-end FIBCs (Flexible Intermediate Bulk Containers). With over 30 years of dedication to the industry, we take cost-effective customized solutions as our core. Relying on solid technical accumulation and strict quality control, we have become a trusted choice for well-known enterprises both at home and abroad, and are committed to providing packaging solutions that carry trust and safeguard value for global customers.
The company boasts strong strength, with two modern production bases located in Laishan District and Muping District of Yantai City respectively, covering a total area of 60,000 square meters. It has more than 300 employees, including over 30 professional and technical personnel and inspectors. We have built a complete closed-loop industrial chain covering raw material processing to finished product manufacturing, strictly controlling quality and delivery efficiency from the source. Backed by advanced production equipment and a lean management model, we maintain a stable monthly output of over 250,000 units and an annual output exceeding 3 million units, capable of efficiently meeting both bulk procurement needs and personalized customization requirements.
Designing custom packaging architectures to mitigate risks and streamline automated supply chains
Procuring plastic resins, polyethylene powders, and fine chemical catalysts requires absolute safety. Type B bags prevent static accumulation during rapid pneumatic filling processes without grounding down-times.
Fine powders like graphite, cobalt, and lithium carbonate are susceptible to ignition from electrostatic sparks. Our specialized antistatic bags maintain structural purity while preventing spark hazard formation.
For high-purity APIs and pharmaceutical excipients, our aluminum foil-lined Type B bags provide gas, light, and static barriers to guarantee product stability and dust containment.
In global procurement, compliance with regional health and safety legislation is non-negotiable. European manufacturers operating under the ATEX directives require clear documentation demonstrating compliance with EN 61340-4-4. Our Type B bags carry the CE marking and undergo rigorous third-party verification to guarantee that the breakdown voltage remains safely below the 6 kV threshold. This minimizes administrative overhead for compliance managers and ensures smooth customs clearance and safety inspections at bulk discharge points worldwide.
Step-by-step transparency from raw material extrusion to high-precision finished packaging
Extruding virgin polypropylene granules into high-tensile flat tapes with exact dimensional control.
Weaving flat tapes into heavy-duty circular or flat fabrics with uniform tensile strength.
Ultrasonic cutting technology is deployed to prevent fraying and minimize particulate contamination.
Custom hazard warning symbols, safety guidelines, and brand graphics applied using durable inks.
Precision stitch patterns with dust-proof filler cords executed by skilled operators.
Inserting custom protective liners (LDPE, conductive, or aluminum foil) to enhance barrier properties.
Every single bag undergoes rigorous electrostatic, dimensional, and seam strength testing.
Baling, compression, and palletization to maximize logistics efficiency and protect during transit.
Demonstrating compliance with ISO 9001, ISO 22000, and strict international standards
The next generation of static control, raw material purity, and ecological sustainability
Traditional Type B bags limit breakdown voltage through specialized anti-static masterbatch additives during raw material extrusion. Our R&D department is currently engineering next-generation fabrics incorporating nano-clay and graphene-derived additives. These materials guarantee that the breakdown voltage remains consistently under 4 kV, even in extreme dry-air environments where moisture cannot assist charge dissipation.
With corporate sustainability mandates accelerating globally, we are developing the industry's first electrostatic-safe FIBC range incorporating up to 30% Post-Consumer Recycled (PCR) polypropylene. Through precision blending and strict molecular testing, we ensure that recycled materials do not affect the fabric's tensile strength, safety factors, or breakdown voltage safety limits.
Especially for FIBCs designed for food-grade and high-hygiene applications, we use 100% virgin polypropylene raw materials, with all technical specifications strictly complying with FDA food-grade standards to eliminate contamination risks from the source. During production, all fabrics are cut using ultrasonic cutting technology, which effectively avoids fraying and dust issues caused by traditional cutting methods and ensures material cleanliness.
Most importantly, all sewing processes for high-hygiene products are completed in a dust-free workshop that meets the ISO22000 Food Safety Management System standards, equipped with professional dust removal equipment for full-process control of the production environment. We solemnly promise that every FIBC leaving our factory undergoes strict disinfection, ensuring it is hygienic, dust-free, and free from any impurities or contaminants, making it a reliable choice for all packaging needs that demand high hygiene standards.
A glimpse into our state-of-the-art production floors and laboratory equipment
Understanding cost structures, materials, and specification factors that influence procurement pricing
Sourcing Type B antistatic bags requires balancing protective capability with volume-pricing realities. Because Type B fabrics utilize specialized non-conductive, anti-discharge additives incorporated uniformly during polyolefin extrusion, the baseline cost is slightly higher than standard Type A bags. However, it remains a highly cost-effective option compared to Type C and D bags, which require costly conductive grid yarns or patented dissipative coatings.
| Base Style | Dimensions (cm) | Safe Working Load (SWL) | Fabric Weight (GSM) | Estimated Base Price (FOB China)* |
|---|---|---|---|---|
| Standard Tubular | 90 x 90 x 110 | 1000 kg | 160 + 30 (Coated) | $7.50 - $9.80 |
| Tubular with Baffles | 95 x 95 x 120 | 1250 kg | 180 + 30 (Coated) | $9.20 - $11.50 |
| Corner Loop (Cross-Corner) | 90 x 90 x 130 | 1500 kg | 200 + 30 (Coated) | $11.00 - $13.50 |
| U-Panel (Reinforced seams) | 100 x 100 x 140 | 2000 kg | 220 + 30 (Coated) | $13.80 - $16.50 |
| Laminated with Foil Liner | 95 x 95 x 120 | 1000 kg | 170 + 30 + Foil Liner | $22.00 - $28.00 |
*Note: Prices listed above are general approximations for contract volume orders of 2,000+ units. Pricing fluctuates based on current raw Polypropylene material indices, customization level, dynamic loop placement, and specific cleanroom requirements.
Uncompromising safety, vertical integration, and dedicated service
From raw materials to finished products, the entire process is strictly controlled and traceable, using 100% new materials in an ISO 22000 compliant cleanroom setup.
Full customization of size, load capacity, and structure for both food-grade and industrial applications, with professional OEM & ODM services supporting brand, design, and parameter customization.
FDA- and ISO 9001-compliant production supporting both food-grade and industrial FIBC applications, with full-cycle quality control ensuring stable quality for large-volume orders.
Our professional international sales team provides efficient bilingual support from inquiry to after-sales service. We deliver reliability, creativity, and partnership to help you stand out.
Providing clear, authoritative answers to critical compliance and operation queries
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