Liquid packaging board

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Liquid packaging board is a multi-ply paperboard with high stiffness, strong wet sizing and a high barrier coating. Only virgin paper fibers are used. The barrier coating must hold the liquid and prevent migration of air and flavors through the paperboard.^[1]

Manufacture

A liquid packaging board might be up to five plies and is formed on a multi-ply paper machine with online coating. The most common is to use three plies with a basis weight of about 300 g/m².^[2] The base or middle ply is normally made of pulp from bleached or unbleached chemical pulp, CTMP or broke (waste paper from a paper machine). CTMP gives more bulk and stiffness. The top ply (inside) is made of bleached chemical pulp. The barrier coating depend of the application and might be applied on both sides. The back side of the board is the printing side and might have an extra ply made from chemical pulp of quality that is suitable for the printing applications. Liquid packages are normally heat sealed.

Cartons filled with short shelf life dairy products use board that are barrier coated on both sides with one layer of low density polyethylene. For long shelf life products it is common to use aluminium foil as barrier coating together with polyethylene. Commonly the plastic coating on the top side is 12 - 20 g/m² and on the reverse side 15 - 60 g/m².^[2]

Liquid packaging board are used for two package types: brick and gable top cartons.

Applications

Packaging for beverages. The most common applications are milk and juicebox packaging.

References

↑ Paulapuro, Hannu (2000). "2". Paper and Board Grades. Papermaking Science and Technology 18. Finland: Fapet OY. pp. 62–64. ISBN 952-5216-18-7
↑ 2.0 2.1 Savolainen, Antti (1998). "6". Paper and Paperboard Converting. Papermaking Science and Technology 12. Finland: Fapet OY. pp. 169–170. ISBN 952-5216-12-8

v t e Packaging

General topics	Active packaging Child-resistant packaging Food packaging Package pilferage Package testing Packaging engineering Pharmaceutical packaging Shelf life Tamper-evident Tamper resistance Wrap rage

Containers	Aerosol spray Aluminium bottle Aluminum can Ampoule Antistatic bag Bag-in-box Barrel Biodegradable bag Blister pack Bottle Box Bulk box Carboy Carton Chub Clamshell Corrugated box design Crate Drum Envelope Flexible intermediate bulk container Foam food container Folding carton Insulated shipping container Intermediate bulk container Jar Juicebox Keg Multi-pack Padded mailer Pail Plastic bag Plastic bottle Popcorn bag Retort pouch Sachet Self-heating can Self-heating food packaging Shipping container Skin pack Spray bottle Tin can Tube Unit load Wooden box

Materials and components	Adhesive Aluminium foil BoPET Bubble wrap Cellophane Closure Coated paper Corrugated fiberboard Corrugated plastic Cushioning Desiccant Foam peanut Glass Hot-melt adhesive Label Linear low-density polyethylene Liquid packaging board Low-density polyethylene Metallised film Modified atmosphere Molded pulp Nonwoven fabric Overwrap Oxygen scavenger Packaging gas Pallet Paper Paper pallet Paperboard Plastic film Plastic pallet Plastic wrap Polyester Polyethylene Polypropylene Pressure-sensitive tape Screw cap Screw cap (wine) Security printing Security seal Shock and vibration data logger Shrink wrap Slip sheet Strapping Stretch wrap Susceptor Temperature data logger Time temperature indicator Tinplate Velostat

Processes	Aseptic processing Authentication Automatic identification and data capture Blow fill seal Blow molding Calendering Canning Containerization Curtain Coating Die cutting Electronic article surveillance Extrusion Extrusion coating Graphic design HACCP Hermetic seal Induction sealing Injection molding Molding Papermaking Plastic welding Plastics extrusion Printing Quality assurance Radio-frequency identification Track and trace Vacuum forming Ultrasonic welding Verification and validation

Machinery	Barcode printer Barcode reader Bottling line Can seamer Cartoning machine Check weigher Conveyor system Extended core stretch wrapper Filler Heat gun Heat sealer Industrial robot Injection molding machine Lineshaft roller conveyor Logistics automation Material handling equipment Mechanical brake stretch wrapper Multihead weigher Orbital stretch wrapping Palletizer Rotary wheel blow molding systems Shrink tunnel Staple gun Tape dispenser Turntable stretch wrapper Vertical form fill sealing machine

Environment, post-use	Biodegradation Environmental engineering Glass recycling Industrial ecology Life-cycle assessment Litter Paper recycling Plastic recycling Recycling Reuse Source reduction Sustainable packaging Waste management

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