This overseas client specializes in the processing and export trade of food‑grade powder raw materials. Its existing material transfer and discharging processes have long adopted stainless‑steel silos and metal transfer hoppers for powder temporary storage and automatic discharging. Such complete sets of metal storage equipment feature high procurement costs and heavy dead weight, resulting in exorbitant cross‑border sea freight. Moreover, metal tanks cannot be folded for storage when idle, thus occupying large areas of factory warehouse space.
The client plans to launch a lightweight temporary transfer‑and‑discharging renovation project, seeking flexible packaging products that can fully replace metal hoppers for the full‑range processes including production‑line powder filling, suspended discharging and short‑distance transfer. Long‑term bulk procurement will be carried out for the European market, with stringent requirements for bag load‑bearing capacity, suspension stability, discharging smoothness and reusability.
The primary requirement is that the product shall fully replace conventional metal discharging silos and adapt to the workshop steel‑frame hoisting structure. When loaded with powder and kept in full suspension, the bag shall not deform and lifting loops shall not rupture. The bottom conical structure shall ensure smooth powder discharge without blockage or material residue.
The product shall be lightweight to substantially cut overseas logistics costs for sea shipment. Empty bags shall be foldable for storage without occupying extra warehouse space. Sewing seams and lifting‑loop joints shall be heavily reinforced to enable multiple‑cycle turnover and comply with hygiene standards for food‑raw‑material storage and transportation. The reserved connecting port at the bottom shall have unified dimensions to fit precisely with the client’s on‑site automatic discharging pipeline. No powder dust shall spill throughout handling. The overall procurement and operating costs shall be far lower than those of stainless‑steel tanks.
In view of the client’s on‑site working conditions and overseas application standards, we custom‑developed food‑grade suspended conical‑discharge FIBC bulk bags. The bags are elaborately sewn from virgin food‑grade polypropylene woven fabric. Four corners are fitted with widened, thickened high‑strength purple industrial lifting loops, which run through the full height of the bag body and are integrally sewn to evenly distribute load stress across the whole bag, greatly improving suspension load‑bearing performance and tear resistance.
The upper section forms a square storage compartment, while the bottom is integrally sewn into a large‑angle conical hopper for material guidance, fundamentally avoiding powder accumulation and blockage. The hopper outlet is custom‑sized to match the client’s equipment caliber for direct connection to workshop discharging pipelines, with tightly sealed joints to prevent dust escape.
Multiple‑layer edge‑wrapping reinforcement is applied at critical stress points including lifting‑loop‑to‑bag joints and the conical base. Leak‑proof cotton strips are added to bag seams to achieve leakage‑proof performance for ultra‑fine powder. Free of hard metal components, the complete product features light weight. After use, it can be fully folded for storage once internal supporting structures are removed, fully meeting all the client’s requirements for metal‑hopper replacement.
After batch delivery and commissioning on the production line, the products perfectly take over all transfer and discharging functions previously performed by metal silos. The bags stay rigid and stable under steel‑frame suspension. No lifting‑loop rupture, bag deformation or bottom material leakage has occurred after thousands of loaded hoisting cycles. The conical design delivers thorough, smooth discharge with nearly zero residual material inside the bags, effectively reducing powder raw‑material loss.
Compared with stainless‑steel metal hoppers, the procurement cost of these flexible FIBCs is reduced by over 60%. The lightweight design brings significant cuts in cross‑border sea freight. The foldable‑empty‑bag feature frees up substantial factory warehouse space. Made of food‑grade materials compliant with European food‑contact material regulations, the products have successfully passed local import quality inspection.
Per client feedback, this custom solution delivers far higher cost‑performance than anticipated, thoroughly resolving pain points of metal silos such as high cost, difficult transportation and large footprint. Long‑term stable cooperation will be established with repeat orders placed continuously.
Client Quote This customized solution delivers much better cost‑effectiveness than expected. It completely solves many pain points of metal silos including high purchase cost, difficult transportation and large space occupation. We will establish long‑term stable cooperation and keep placing repeat orders.