4 Types of Paperboard

Apr . 19, 2024 15:30 Torna alla lista

4 Types of Paperboard Duplex Board

Our industry lives and breathes paperboard. The thick paper substrate can be transformed into any number of designs, from simple tuck cartons to intricate, sculpted packages that impart a sense of luxury and wonder. With all that versatility, it’s not surprising that there are many types—or grades—of paperboard to choose from, each with different prosperities, strengths, and weaknesses.

DUPLEX BOARD WITH GRAY BACK

Here are just four grades and the products or end-use categories that most frequently use them.

1. SOLID BLEACHED SULFATE (SBS)

A premium grade, brilliant white SBS has a clay-coated surface for high-quality printing and a top ply of bleached virgin hardwood fibers for smoothness. The other plies are made of bleached virgin softwood or a blend of softwood and hardwood fiber. Because it is a solid white sheet, SBS is the preferred choice for food packaging and many high-end retail products. Sectors that regularly use SBS include:

Cosmetics
Wet foods
Frozen foods
Tobacco
Dairy products (butter, ice cream, milk)
Meats
Perishable bakery products
Medical products

2. COATED UNBLEACHED KRAFT (CUK)

Whereas SBS is white throughout, CUK is made from unbleached virgin kraft fiber, which imparts a natural brown color. This board grade is comprised primarily of various southern pine species (softwoods) with some hardwood fiber, particularly in the top ply which is clay-coated to create a smooth, white printing surface. The long, large pine fibers impart excellent strength and tear resistance qualities to the finished sheet. This strength characterizes the CUK grade. It’s commonly used for beer and soft drink beverage containers as well as heavy-duty retail packaging such as hardware and concentrated laundry detergents.

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