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Categories: Book printing >> Support Center
Corrugated Materials (Virgin Fibers)
Origin:Image Printing  Data: 3/14/2011  Keywords: Corrugated Materials printing

The main material paper is made of wood fibers. For the corrugated material, the main raw material is also the virgin fibers. Wood fibers can be obtained in almost as many forms as there are types of trees. The differences between many species are, however, too small to affect the paper properties and there are effectively only two categories of importance, softwoods including evergreens such as pine and spruce and hardwoods including broadleaf trees such as birch and beech.

Softwood generally has longer fibers than hardwood, and its fibers are used in general when strength is needed. This means that the liner in corrugated board made from virgin fiber, is predominantly made from softwood fibers.

The predominant virgin raw material used in the manufacturing of the corrugating medium in corrugated board is semi chemical hardwood. Hardwood is used as it is cheaper and gives good resistance to forces perpendicular to the flutes. The short hardwood fibers are less flexible than the softwood fibers and impart greater stiffness to the corrugated structure.

Solid Bleached Board (SBB) or Solid bleached sulphate (SBS) is a virgin fibre grade of paperboard. This grade is made purely from bleached chemical pulp and usually has a mineral or synthetic pigment coated top surface in one or more layers as well as a coated reverse side. It is a medium density board with good printing properties for graphical and packaging printing end uses and is perfectly white both inside and out. It can easily be cut, creased, hot foil stamped and embossed. Its other properties, such as being hygienic and pure with no smell and taste, make it usable for packaging aroma and flavour sensitive products such as chocolate, cigarettes and cosmetics.

Solid Unbleached Board also known as SUB. This is a grade of paperboard which is typically made of unbleached chemical pulp. Most often it comes with two to three layers of mineral or synthetic pigment coating on the top and one layer on the reverse side. Recycled fibres are sometimes used to replace the unbleached chemical pulp. The main end use for this type of board is for packaging of frozen or chilled food, beverage carriers, detergent cereals, shoes, toys and others.

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As a professional book printing factory in China, Image Printing Packaging Ltd focus on book printing and packaging printing mainly for oversea and domestic customers. We are located in Shenzhen city, the book printing and packaging printing industrial center of China and even worldwide. Please be kindly note we offer a wide range of professional customed printing service with aggressive prices
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