Coated Type-D FIBCs Keep Cathode Powder in Spec Across 34-Day Ocean Transit
A Lithium Cathode Material Producer, Asia
Challenge:
An NMC cathode powder producer exporting to Europe shipped 1,000 kg loads in ~40 fiber drums, with customer rejections at destination when water content drifted past the 2,500 ppm spec on long ocean legs, plus drum disposal costs and slow manual discharge at receiving plants.
Solution:
1,000 kg coated FIBCs (double-wall PP film laminate) in static-dissipative Type-D construction with valve discharge, desiccant sachets, per-batch CoA with water-content verification, and ISO 21898-1 test evidence for the exact specification.
Result:
Water content held under 2,500 ppm across 34-day transit on all audited shipments, destination rejections fell to zero within two quarters, per-tonne packaging cost dropped 62% versus drums, and receiving-plant discharge time cut from ~45 minutes to ~10 per 1,000 kg.
Background
A lithium cathode material producer in Asia ships NMC (nickel-manganese-cobalt) powder to three European customers, roughly 1,200 tonnes per month across containerized ocean and rail-ocean legs of 30 to 38 days. The powder is a fine, high-value, moisture-sensitive material: particle size in the single-digit microns, and a customer water-content spec of 2,500 ppm on arrival. The receiving plants discharge directly into dry-rooms-adjacent processing lines, so both moisture control and discharge cleanliness are contractual.
The Challenge
The producer was shipping in fibre drums — about 40 drums per tonne. Three problems compounded:
Moisture drift on long legs. Drums with liner bags still failed the water-content spec on 34-day routes through humid ports; the customer rejected two shipments in a single quarter, each rejection costing rework, delay penalties, and relationship capital.
Packaging cost and waste. Fibre drums are expensive per tonne, the empty drums are a disposal cost (not recyclable with PP streams), and ~40 drums per tonne consumed container space and manual handling that a 1,000 kg FIBC eliminates.
Slow, dusty discharge. At the receiving plants, ~45 minutes per tonne of manual drum discharge, with fugitive dust at every drum opening. The European plants had been asking for bulk packaging with a controlled, high-recovery discharge for a year.
Our Approach
We specified coated FIBCs: 1,000 kg, double-wall PP film laminate for the moisture barrier, static-dissipative Type-D fabric because pneumatic transfer of fine cathode powder charges the bag surface, and valve discharge for clean, high-recovery emptying at the destination. Two kilograms of desiccant were added per bag for the ocean routes, and the spec carried per-batch CoA with water-content verification plus the full ISO 21898-1 test suite (lift, drop, carry, stack, static-dissipation) on the exact coated specification.
Rollout was phased: three pre-shipment test lots per customer (one per route length), water-content sampling at origin and destination on every bag of the first month, then a move to 100% of the affected volume over six months.
The Results
- Zero destination rejections in the two quarters after full conversion, with audited water content under 2,500 ppm on 34-day legs — the desiccant-plus-barrier combination held on routes that previously failed with drums.
- Per-tonne packaging cost down 62% versus fibre drums (one 1,000 kg FIBC plus desiccant against ~40 drums and liners), and empty-bag return logistics replaced drum disposal.
- Discharge time cut from ~45 to ~10 minutes per tonne at the receiving plants, with valve discharge eliminating the drum-opening dust event.
- Container utilization improved enough to free a pallet row per box, and two customers extended the specification to their anode powder stream — where the same coated Type-D construction now ships with 200 kg desiccant-free variants on shorter legs.
