Corrugated & Packaging Paper

"Corrugated & Packaging Paper" refers to materials specifically engineered for protecting, containing, and transporting goods. This primarily includes corrugated board (often called "cardboard") and various types of paper used for wrapping, bags, and general packaging.

Types of Corrugated & Packaging Paper

Corrugated Board:

Single-Face: One linerboard and one fluted medium.

Single-Wall (Double-Face): Two linerboards and one fluted medium (most common).

Double-Wall: Three linerboards and two fluted mediums (for heavier duty).

Triple-Wall: Four linerboards and three fluted mediums (for very heavy loads).

Flute Types: A, B, C, E, F (varying in thickness and strength).

Packaging Paper:

Kraft Paper: Strong, unbleached paper used for bags, wrapping, and as linerboard for corrugated.

Linerboard: The flat outer and inner sheets of corrugated board, typically made from kraft paper or recycled pulp.

Medium Paper (Fluting Paper): The wavy inner layer of corrugated board.

Greaseproof Paper: Treated to resist grease and oil.

Waxed Paper: For moisture resistance.

Glassine Paper: Translucent, smooth, moisture-resistant.

Recycled Paperboard: Used for folding cartons, cereal boxes.

Applications in Various Industries

Shipping & Logistics: Corrugated boxes for primary and secondary packaging of almost all goods.

Food & Beverage: Packaging for produce, processed foods, beverages (e.g., pizza boxes, cereal boxes).

E-commerce: Essential for protecting goods during transit.

Retail: Displays, product packaging.

Manufacturing: Component packaging, protective wraps.

Agriculture: Produce boxes.

Technology:

Corrugators: Large machines that combine linerboard and medium to create corrugated board.

Printing Technologies: Flexography, digital printing for branding and information.

Folding & Gluing Machines: Automated systems for box formation.

Water-Based & UV Coatings: For moisture resistance, gloss, or barrier properties.

Die-Cutting: For custom shapes and designs.

Recycling Processes: Advanced de-inking and pulp purification for producing recycled content.

Sustainable Packaging Solutions: Lightweighting, use of recycled content, compostable coatings.

Material Selection Considerations

• Fiber Source: Virgin pulp (from trees) for maximum strength and purity, or recycled pulp for sustainability and cost-effectiveness.
• Paper Weight/Basis Weight (GSM): Determines strength and stiffness.
• Flute Profile (for corrugated): Impacts cushioning, stacking strength, and printability.
• Bursting Strength: Resistance to rupture.
• Edge Crush Test (ECT): Measures stacking strength.
• Moisture Resistance: Coatings or specific paper treatments for moisture-sensitive products.
• Printability: Surface smoothness and absorbency.
• Food Contact Safety: For direct food packaging, specific grades are required.
• Sustainability: Recycled content, recyclability, biodegradability.