QINFENG Custom FIBC manufacturer since 2001
Forestry & Biomass Application brief
Handling firewood, wood chips and pellets in bulk bags: heavy, abrasive, often wet loads that are stacked outdoors and moved with rough handling.
Firewood and pellet producers, sawmills, biomass traders and garden-centre suppliers. The buyer is usually an owner or operations manager who wants a bag that survives a wet yard and a forklift, not a bag with a liner.
Firewood, Pellets, Wood Chips and other dry bulk solids, typically 0.8–1.6 t/m³.
Handling chain
Filling is usually by hand or from a hopper into an open-top bag, so the bag is dragged and dropped during filling. Lifting is by forklift or a tractor loader on four corner loops, often over rough ground. Storage is outdoors for weeks to months. Discharge is by cutting the base or tipping the bag.
Filled on automated spouts or semi-manual toll lines. High-speed de-aeration shapes the square footprint before the bag leaves the fill station.
Stacked two to three tiers high in transit warehouses. A baffle construction that does not bulge keeps the stack square instead of leaning into the aisle.
Lifted three to five separate times by port stevedores. Reinforced loop anchoring and cross-corner loops resist fork abrasion and tine punctures.
Has to fit inside the container wall, at roughly 2,350 mm internal width. A square footprint uses the cube without the bag dragging on the wall.
What fails in this chain
Abrasion and puncture dominate: split firewood and chip edges cut loops and body panels, and rough yard surfaces and forklift tines do the rest. Outdoor storage for months makes UV stabilisation a specification item rather than a default, and the loop attachment is usually the first thing to fail on a bag that has been sitting in the sun. Moisture in a closed bag turns wood chips and pellets into a compost heap, so ventilation is usually wanted instead of a liner. Pellet loads are dense and settle, so the filled bag can become very hard and the base seam has to be built for it.
Hazard: A standard tubular bag rounds out as it fills, wasting container volume and leaning in a warehouse stack.
QINFENG defense: Internal perforated ultrasonic baffles hold a square profile after fill, which is what makes three-high stacking in a shed predictable.
Hazard: Repeated lifting by rough tines tears side seams or frays loop attachment bases at transhipment hubs.
QINFENG defense: Heavier coated fabric with reinforced corner perimeter wraps and extra loop reinforcement backing, specified from the number of relifts.
Hazard: Faded printing or a torn document pouch causes customs delays and rejected cargo at the destination port.
QINFENG defense: Flexographic printing with UV-cured inks and a reinforced document pocket sewn onto the body seam, agreed before production.
Hazard: Unsheltered storage while awaiting vessel arrival degrades untreated polypropylene yarn within weeks.
QINFENG defense: UV-stabilised masterbatch in the tape, selected for how long the consignment actually waits on the quay rather than for the total storage period.
What we would quote
Choose the fabric and loop attachment for the handling, not for the weight alone: a heavier loop panel with extra stitching usually outlasts a heavier body fabric. If the product is stored wet or green, leave it ventilated and skip the liner. If the buyer wants the bag to survive a second season, say so at quotation stage - that is a UV and loop decision, not a fabric weight decision.
Before we can quote
Bag dimensions, baffle spacing and the safety margin all follow from these. Answer the ones you can and leave the rest; the missing details can be settled with our engineers.
Firewood, chips or pellets, and whether the product is dry, green or wet when bagged.
The weight the yard actually fills - pellet loads settle and get heavier than expected.
Forklift, tractor loader or crane, and whether bags are dragged during filling.
Open yard, covered yard or indoors, and how many months the bag has to last.
Whether the load needs airflow to avoid mould, or a moisture barrier instead.
Whether the bag is used once or has to survive a second season, which changes the UV and loop specification.
This page covers firewood, wood chips and pellets in standard FIBC constructions. It does not cover bulk truck or walking-floor trailer delivery, and it does not set the customer's drying or storage regime.
Talk to the applications team
We will come back with the construction we would build, the safety factor it carries and the dimensions that fit your loading plan — with drawings and a prototype before any bulk run.