Your LLDPE Container Is Rolled: Rebooking, Demurrage and Claim Path

A rolled LLDPE container is not a polymer processing defect; it is a carriage contract interruption produced by vessel overbooking, terminal closed-out stack design, or a VGM submission that misses the transport cut-off. Linear low-density polyethylene resin for film and sheet conversion carries a density range of 0.916 g/cm³ to 0.940 g/cm³ under ASTM D1505-18 and a melt index range of 0.5 g/10 min to 2.0 g/10 min at 190°C/2.16 kg under ISO 1133-1:2022 for most extruded film grades. A standard 40-foot high-cube dry container holding 25,000 kg of pelletized LLDPE in 1,000 kg bulk bags or 25 kg sacks is not classified as dangerous goods under the IMO IMDG Code. However, a roll-over can extend the container’s dwell time in a marine terminal, and the outer bags may experience long solar exposure. Surface slip additive migration can change the coefficient of friction later measured under ASTM D1894-24, while the thermal mass of the full load tends to limit the pellet core temperature change. For a monolayer cast-film converter, a delayed lot can alter winding tension and blocking behavior, but the lot itself remains usable if the incoming inspection matches the certificate of analysis.

What terminal conditions cause an LLDPE FCL to be cut from the vessel?

Roll-over is a vessel load-planning action. The carrier must manage stack-weight, port rotation, transshipment connectivity, and the available number of safe stows. A 25 MT LLDPE unit may be rolled when the assigned service is overbooked or when the vessel starboard stack weight exceeds the quay crane load pocket. The terminal cut-off is not a delivery benchmark; it is the point after which the container cannot be gated in for the planned vessel. If the physical unit is already in the terminal, a closed-out vessel may move it to a rollover stack, but the loaded container remains in the terminal operator’s custody. Under SOLAS Chapter VI Regulation 2, the Verified Gross Mass must be received before the cut-off; a late VGM submission can create a gate rejection even when the truck is at the terminal island. The rebooking path then depends on whether the container entered the terminal stack before or after the rollover. A container that never passed the gate may be returned to the shipper or held at an off-dock depot. A loaded container that entered the stack cannot be removed without a formal rebooking amendment and a new terminal release. Public vessel schedule reliability measurements for container shipping show that schedule deviation is a recurring operational variable, but published LLDPE-specific roll-over frequency data is limited. The terminal event log stores both gate-in and vessel-load timestamps; that log is the primary evidence for a carrier-roll-over waiver request.

The rebooking request requires the original booking number, the new vessel code, the revised cut-off date, the VGM, and the container number. If the roll-over occurs after empty pickup but before vessel cut-off, the same container may be re-nominated to the next sailing. If the roll-over occurs after gate-in, the shipper cannot re-tender the cargo without a terminal release instruction. The bill of lading is not corrected automatically; the draft must be amended to the new vessel/voyage, and the port of loading or transshipment may change. Under Incoterms 2020 FOB, if the goods have not been placed on board, delivery is not complete and the risk transfer to the buyer has not occurred. The carrier’s rebooking desk may use a new service with a longer transit profile. A direct ocean service published at 28 days can be replaced by a relay service published at 42 days or longer; the exact revised transit time must be pulled from the new routing before the waiver request is submitted. The shipper should also verify that the new bill of lading retains the same polymer grade lot number, comonomer type, and packaging code. A lot substitution in film-grade LLDPE is not neutral: hexene-based and butene-based resins of equal density and melt index do not have identical dart impact or Elmendorf tear performance under ASTM D1709-22 and ASTM D1922-15. Food-contact conversion additionally requires that the replacement lot remain covered by a valid FDA 21 CFR 177.1520 olefin polymer certification.

Demurrage and detention differentiation at the destination marine terminal

Demurrage at destination is a charge for the use of the container inside the terminal after discharge until gate-out. Detention is the charge for the use of the container outside the terminal after gate-out until the empty is returned. The free-time window is a contractual term in the tariff and the service agreement; for a standard dry FCL unit, published free-time windows often range between 3 days and 10 days, but the application to a specific LLDPE bill of lading must be verified against the tariff because it is not uniform across carriers. After the free time expires, demurrage and detention may run in parallel if the consignee has gated out the container and has not redelivered the empty. A roll-over at origin does not automatically cancel destination demurrage; it only changes the discharge schedule. The consignee may face a terminal hold for missing original documents, customs inspection of the LLDPE under the Harmonized System heading 3901, subheading 3901.10 or 3901.40 depending on specific gravity and comonomer classification, or a carrier’s electronic no-release status. Before lodging a claim, the operator should obtain the terminal interchange report showing the actual discharge timestamp and the gate-out timestamp. The claim path must isolate whether the terminal hold was caused by the carrier roll-over or by the consignee’s own document delay. In a carrier-caused delay, a waiver may be available only if the booking note or service contract contains a demurrage waiver clause; without such a clause, published recovery data for this specific configuration is limited.

For LLDPE pellets packed in sacks, the delay itself does not usually create a dangerous cargo condition. Polyethylene is not hydrolytically degradable, but surface water can be introduced when warm container headspace condenses onto the polyethylene liner. A wet liner or wetted sack surface can raise the pellet moisture load entering the extruder, and film extruders may observe gassing at the die lip if the moisture is above roughly 0.02% by mass. Converters running linear low-density resin often do not predry if the incoming moisture is below 0.01%; after a long terminal dwell in humid air, predrying at a desiccant dryer with a -40°C dew point for 2 h is a practical corrective step. The rebooking of a roll-over lot should therefore include a visual check of the bulkhead, the PE liner heat seals, and the desiccant bag replacement. If the inner liner is torn, silo-blending with dry virgin pellets may be used, but the blend ratio must be derived from measured moisture content rather than pellet age.

LLDPE differs from low-density polyethylene in branching architecture: it contains short linear branches from copolymerized alpha-olefins rather than the long-chain branches of autoclave or tubular LDPE. This molecular arrangement allows downgauging of films without losing mechanical properties. A roll-over that adds terminal dwell does not change the molecular weight distribution, but it can alter the surface additive package. Erucamide and oleamide slip agents migrate to the pellet surface at room temperature; the coefficient of friction may drop with dwell time. For a converter running high-speed horizontal form-fill-seal packaging, a lower COF can create bag tracking errors. That is why incoming COF testing under ASTM D1894-24 should be added after the delay. If the COF is below the production specification, the film can be blended with fresh resin, but the blend ratio should not be based solely on pellet age. Film-grade LLDPE made with octene-1 can display better toughness retention in thin-gauge film than a butene-1 grade of the same density, but the material is normally more expensive and more sensitive to shear-induced molecular orientation. The rebooked replacement lot should not be accepted by visual appearance alone. The certificate of analysis must state the comonomer type; if it is absent, differential scanning calorimetry under ISO 11357-3:2018 can be used to compare the melting profile, but this is not a substitute for the supplier’s lot card. For a film converter running a 75 mm single-screw extruder with an L/D 30:1, a melt-index shift of 0.3 g/10 min can produce a measurable pressure difference at the die. The die gap and air ring must be reset to maintain final film thickness under ASTM D6988-21.

When the rebooked LLDPE container must be re-inspected before gating out

If the container has been rolled twice, or if the first roll-over occurred after gate-in and the terminal moved the unit within the stack, the consignee should treat the container as a non-standard receipt. At the destination gate, the driver should record the CSC plate data, the container number, the seal number, and any visible damage to the right-side door gasket. LLDPE sacked resin is often loaded with kraft paper or polypropylene woven bags; if the seal is broken or the gasket is compressed, moisture and insect ingress can affect the cargo presentation. The terminal and carrier may not allow a damaged seal to be broken until the container is at the consignee’s facility and a cargo surveyor is present. Under Hague-Visby Rules Article III(6), a notice of loss or damage must be given in writing at the time of delivery for apparent damage, or within 3 days for non-apparent damage. The rule is a strict time-bar defense. A claim based only on delay does not have the same liability framework; it must be proven that the delay itself caused the loss. For a stable LLDPE resin shipment, the more likely claim path is commercial recovery under the sale contract or the freight service contract rather than an ocean cargo damage claim.

Areas where published delay recovery data for LLDPE is limited

The published record for roll-over-related demurrage waivers is fragmented because carrier tariffs are contract-specific and terminal storage rates are not uniform. A consignee evaluating a claim path should not apply a single free-day number across ports. Instead, the operator must read the tariff, the service schedule, and the terminal’s storage schedule together. In many countries, port community systems use event timestamps from the terminal operating system; these timestamps are the authoritative evidence for a demurrage dispute. The claim path should preserve the original arrival notice, the rebooking confirmation, the revised bill of lading, the interchange report, the container status event log, and the equipment return receipt. A single missing gate-in timestamp can reduce the waiver request from a carrier-roll-over case to a general warehouse demurrage complaint. For LLDPE, the product-related delay loss is not primarily degradation; it is the mismatch between the arrived lot and the converter’s scheduled film campaign. If the replacement lot is a butene-based grade and the original was a hexene-based grade, a side-by-side conversion check should be run before blending or silo release.