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Understanding Corrugated Paper & Flute Types

Flute types, stiffness, and how to choose corrugated packaging for your application.

Corrugated paper is one of the most widely used materials in food packaging due to its strength, versatility, and recyclability. From takeaway boxes and food trays to retail and transport packaging, corrugated materials play a critical role in protecting food products while supporting operational efficiency.

This guide explains what corrugated paper is, how it works, and how food businesses can choose the right corrugated packaging for their needs.

What Is Corrugated Paper?

Corrugated paper—also known as corrugated cardboard—is a multi-layered material consisting of a fluted (wavy) paper layer sandwiched between liner boards.

The fluted layer provides strength, cushioning, and resistance to crushing, while the outer liners create a flat surface suitable for printing and branding.

This structure makes corrugated paper lightweight yet strong, ideal for food packaging and transport applications.

Types of Corrugated Paper Structures

Single Wall Corrugated Paper

Single wall corrugated board consists of one fluted layer between two liner boards.

Best for:

  • Takeaway food boxes
  • Retail packaging
  • Light to medium-weight food products

It is the most commonly used corrugated structure in food packaging.

Double Wall Corrugated Paper

Double wall corrugated board includes two fluted layers and three liner boards, offering increased strength and rigidity.

Best for:

  • Heavier food items
  • Bulk food packaging
  • Products requiring extra protection during transport

Triple Wall Corrugated Paper

Triple wall corrugated board uses three fluted layers and four liner boards.

Best for:

  • Very heavy or industrial food packaging applications
  • Long-distance transport and export packaging

This structure offers maximum strength but is rarely required for typical food service use.

Understanding Corrugated Flute Types

The flute profile affects thickness, strength, and print quality. Different flute sizes serve different packaging needs.

Common Flute Types

  • A Flute: Thick and strong, suitable for fragile or bulky items
  • B Flute: Thin with good puncture resistance, commonly used for food trays and displays
  • C Flute: Balanced strength and stacking resistance, widely used in shipping boxes
  • E Flute: Thin profile with excellent print quality, ideal for retail and takeaway packaging
  • F Flute: Ultra-thin with a smooth surface, commonly used for clamshell food packaging

Applications of Corrugated Paper in Food Packaging

Corrugated materials are used across the food industry for:

  • Takeaway boxes and clamshell packaging
  • Corrugated food trays and containers
  • Retail-ready packaging
  • Point-of-sale and countertop displays

Its heat resistance also makes corrugated packaging suitable for microwave reheating in many applications.

Key Factors When Choosing Corrugated Food Packaging

When selecting corrugated packaging, consider the following:

Stacking Strength

Determines how much weight packaging can support during storage and transport.

Crush Resistance

Measures the ability to withstand pressure without collapsing.

Puncture Resistance

Important for preventing damage during handling and delivery.

Flute Size and Grade

Different flute profiles and paper grades affect durability, thickness, and cost.

Choosing the right combination ensures performance without over-engineering.

Corrugated Paper and Sustainability

Corrugated paper is one of the most environmentally responsible packaging materials available.

Benefits include:

  • High recyclability
  • Renewable raw materials
  • Reusability in secondary applications
  • Reduced reliance on single-use plastics

When designed correctly, corrugated packaging balances sustainability with performance.

Our Approach to Corrugated Food Packaging

At Asia Pacific Reach, we help businesses choose corrugated packaging based on real-world use, not assumptions.

We consider:

  • Food type and temperature
  • Handling and transport conditions
  • Branding and presentation needs
  • Cost efficiency and sustainability goals

Speak to a Packaging Specialist