Wraptor® Shipping Container Liners & Bulk Container Liner Bags

Additional Information

Container Liners Buyers Guide – Click Here to Download

Wet-Hide/Containment Liners Buyers Guide – Click Here to Download

What Our Certifications Mean for You

Certifications matter in industrial packaging — but the acronyms don’t always explain themselves. Here’s what each one means in plain terms for buyers specifying container liners.

BRC (British Retail Consortium Global Standards): One of the most widely recognised food safety standards in the world. BRC certification means our manufacturing facilities are independently audited for hygiene, quality management, and product safety. For food and pharmaceutical buyers, it’s often a non-negotiable requirement from their own customers and regulatory bodies.

AIB (American Institute of Baking International): An AIB certification is a food safety audit standard widely used in North America, particularly in the grain, milling, and food ingredient sectors. If you’re shipping food products into or out of the US, many buyers and retailers will ask whether your packaging supplier holds AIB certification.

ISO 9001: The international standard for quality management systems. It confirms that a manufacturing facility has documented, consistent processes in place — and that those processes are regularly reviewed and improved. For container liner buyers, it means you can expect consistent product quality across every order.

ISO 22000 / FSSC 22000: Both are food safety management standards. ISO 22000 is the international baseline; FSSC 22000 (Food Safety System Certification) adds a further layer of industry-specific requirements. Together they confirm that food safety risks are identified and controlled throughout the production process — from raw material intake through to finished liner.

HACCP (Hazard Analysis and Critical Control Points): A systematic approach to identifying and preventing physical, chemical, and biological hazards in food contact manufacturing. HACCP certification means our production partners have mapped every point in the process where contamination could occur and have controls in place to prevent it.

Container Liner Glossary

A quick reference for the technical terms used across this page and in our product documentation.

Materials

LLDPE / CO-EXTRUDED LLDPE FILM (Linear Low Density Polyethylene) A multi-layer plastic film produced by bonding multiple polyethylene layers together during manufacture. Co-extrusion delivers a combination of strength, flexibility, and moisture barrier performance. The most common material in food-grade container liners, and the one you’ll see referenced throughout our product specifications.

HDPE (High-Density Polyethylene) A strong, dense form of polyethylene used in woven fabric liners, particularly for heavy-duty containment applications such as wet hide liners. Offers higher puncture and tear resistance than standard PE film.

LDPE (Low-Density Polyethylene) A softer, more flexible form of polyethylene sometimes used in liner fabric for applications where flexibility is more important than tensile strength.

WOVEN PP (Woven Polypropylene) A fabric liner material woven from polypropylene tapes, offering high tensile strength. Used in bulkhead constructions and liner bodies where structural integrity under load is the primary requirement.

ANTISTATIC / DISSIPATIVE FILM A liner film grade that safely dissipates static electrical charge. Required for certain products such as fine powders and some resin grades where static buildup could present a safety or product quality risk.

Liner types & features

THERMAL LINER A container liner constructed from aluminum barrier foil laminate, designed to protect cargo from moisture, oxygen, light, and odour ingress during long ocean voyages. Up to 80 times more effective than standard PE film at preventing moisture damage.

FLUIDIZING LINER A specialist container liner type with integrated air channels in the floor that allow compressed air to re-fluidize compacted bulk products during discharge. Used for hard-to-flow materials such as fly ash, calcium carbonate, flour, and talc.

FELT FLOOR An optional layer of felt material added to the floor of wet hide and containment liners. It absorbs brine and liquids, reduces the risk of forklift puncture during loading, and minimises liner tears from sharp or heavy cargo.

LETTERBOX HATCH A rectangular discharge opening at the base of the container door end, used in top-fill liner designs to allow gravity discharge of bulk product without fully opening the container doors.

Industry & technical terms

CONTAINER RAIN Condensation that forms on the interior walls and ceiling of a shipping container during ocean transit, caused by temperature fluctuations between day and night or between different climate zones. Container rain can cause significant moisture damage to bulk cargo — thermal liners are specifically designed to mitigate this risk.

FOOD GRADE A designation confirming that a liner material is safe for direct contact with food products. Palmetto’s food-grade liners are made from 100% virgin resin compliant with FDA food contact requirements.

MIL A unit of thickness equal to one thousandth of an inch (0.001″). Used to describe the gauge of liner films and fabrics. A 50mil liner (used in heavy-duty wet hide applications) is significantly thicker and more puncture-resistant than a standard 3–5mil PE film liner.

SILO-TO-SILO A supply model in which the container liner supports the full bulk cargo journey from the loading silo at the origin facility through to discharge at the destination silo — without the product ever being exposed to the container walls or external environment.

WVTR (Water Vapor Transmission Rate) A measure of how much water vapor passes through a liner material over a given time period. A low WVTR indicates strong moisture barrier performance — important for cargo that can absorb moisture or degrade in humid conditions during ocean transit.