Folding Box Board (FBB) is a lightweight and high-strength paperboard made from multiple layers of pulp. It is specifically designed for the production of folding cartons and is one of the core materials for packaging consumer goods, especially food and pharmaceuticals.

Folding Box Board belongs to the category of carton paperboard. It is a high-quality paperboard specifically designed for making folding cartons, commonly used for packaging boxes of products such as food, beverages, cosmetics, and pharmaceuticals. Its definition can be understood from several core characteristics:

Multi-layer structure: It is composed of two or more layers of pulp, which endows it with superior physical properties.

Lightweight and High Strength: The original design intention is to achieve lightweight. Compared to other similar paperboards, it consumes less raw materials, reducing transportation weight while ensuring strength.

Key indicators: Its grammage is usually between 200-600 grams per square meter, and its thickness is generally around 0.3-1.1 millimeters.

Core Features and Performance Advantages

The excellent performance of Folding Box Board stems from its unique multi-layer structural design, making it stand out among commonly used household cardboard.

Core structure: multi-layer, typically three layers, with mechanical pulp in the middle.

Stiffness and thickness: Under the same weight, higher thickness and better stiffness are beneficial for die-cutting and creasing.

Surface printing: A smooth, high-gloss surface with excellent printing performance can be achieved through multi-layer coating.

Environmental protection and efficiency: High pulp yield, less production consumption, more paperboard produced per ton, and higher resource utilization rate.

Main applications: packaging for a wide range of consumer products such as frozen foods, chocolates, and pharmaceuticals.

Supplementary: FBB typically utilizes all or primarily virgin fibers to ensure strength and cleanliness, but may also incorporate some recycled fibers in order to reduce costs or meet environmental requirements.

The specific advantages of folding box cardboard are as follows:

Lightweight yet High Strength: The three-layer structure (chemical pulp outer layer + BCTMP middle layer + chemical pulp bottom layer) ensures its portability while maintaining strong hardness, exhibiting excellent compressive strength.

Excellent folding performance: Designed specifically for folding, it is resistant to cracking even after multiple folds, and the creases are clear and durable.

Excellent printability: The surface can be coated one or multiple times, providing a smooth, high-gloss printing surface, making it ideal for high-quality printing.

Efficient processing performance: It can seamlessly adapt to subsequent processing steps such as creasing, die-cutting, bronzing, and laminating.

Raw materials and production process

The production of Folding Box Board is a precise process that transforms virgin wood fibers into high-performance boards.

Raw material selection: The core raw material is plant fiber extracted from wood. Typical manufacturers use virgin fiber to ensure the strength and cleanliness of the paperboard, but may also incorporate some recycled fiber.

Pulping and papermaking: Wood chips are separated into fibers through chemical and mechanical methods to produce pulp. Subsequently, on a specialized paperboard machine, these various pulps are used to form a three-layer structure, with a common technique being the use of bleached chemi-thermomechanical pulp (BCTMP) in the middle layer.

Coating and Calendering: To achieve an excellent printing surface, the surface layer (or both sides) of the paperboard is coated. These coatings consist of pigments such as kaolin and calcium carbonate, along with binders, which fill the fiber pores and enhance smoothness and brightness. Finally, the surface is calendered by a calendering machine to achieve a smoother and more polished finish.

The purpose of Folding Box Board

With its excellent performance and environmental friendliness, folding box board has a wide range of applications, covering almost all consumer goods fields that require elegant packaging:

Packaging applications: including food, cosmetics, pharmaceuticals and health products, consumer goods, etc., used for packaging frozen foods, chocolates, candies, perfume, skincare products, medicines, health products, toothpaste, electronic products, etc.

Graphic applications: used for creating greeting cards, book and magazine covers, postcards, etc.

Overall, Folding Box Board (FBB) is a packaging material that strikes a good balance between strength, printing effect, and environmental performance.