Paperboard

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Paperboard is a thick, paper-based material that is commonly used in packaging. It is typically thicker than regular paper and is known for its durability and strength. Paperboard can be made from recycled paper or virgin pulp, and it is often coated to improve its surface properties.

Types of Paperboard

There are several types of paperboard, each with unique characteristics and uses:

• Solid Bleached Sulfate (SBS) - Made from bleached wood pulp, SBS is known for its white color and smooth surface, making it ideal for high-quality printing and packaging.
• Coated Unbleached Kraft (CUK) - This type of paperboard is made from unbleached kraft paper and is coated to enhance its strength and printability.
• Folding Boxboard (FBB) - FBB is a multi-layered paperboard with a bleached chemical pulp layer on the top and bottom, and a mechanical pulp layer in the middle. It is commonly used for packaging food and consumer goods.
• White Lined Chipboard (WLC) - Made from recycled paper, WLC is often used for packaging products that do not require high strength or aesthetic appeal.

Manufacturing Process

The manufacturing process of paperboard involves several steps:

1. Pulping - The raw materials, either recycled paper or virgin wood pulp, are processed into a pulp. 2. Forming - The pulp is formed into sheets on a Fourdrinier machine or a cylinder machine. 3. Pressing and Drying - The formed sheets are pressed to remove excess water and then dried. 4. Coating - The dried sheets may be coated with various materials to improve their surface properties. 5. Cutting and Finishing - The coated sheets are cut to the desired size and finished for specific applications.

Applications

Paperboard is used in a wide range of applications, including:

• Packaging - It is widely used for packaging food, beverages, cosmetics, and other consumer goods.
• Printing - Due to its smooth surface, paperboard is ideal for high-quality printing and is used for making greeting cards, book covers, and promotional materials.
• Construction - In the construction industry, paperboard is used for making gypsum board and other building materials.

Environmental Impact

Paperboard is considered an environmentally friendly material because it is recyclable and biodegradable. The use of recycled paper in the production of paperboard helps reduce the demand for virgin wood pulp and minimizes waste.

Related Pages

• Paper
• Recycling
• Packaging
• Kraft paper
• Gypsum board

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