Cartonboard is a multilayer material, comprises of three or more layers or plies, of cellulose fibre (pulp) derived from wood. The various layers are combined in the wet state on the board machine and may comprise one or several different types of pulp. The top layer of carton board usually has a smooth white pigmented coating based on china clay and/or calcium carbonate. The reverse side may also be coated or it may be white, brown, cream or grey in colour depending on the grade of fibre used.
Classification
Papers and boards are classified by their fibre composition, the processing, manufacture and treatment at the mill, by grammage and thickness. The crossover point between paper and board is normally considered to be around 160g/m2 as it is only at this level that a fibrous material is likely to be stiff and rigid enough to make a container. Most folding cartons are in the range 200-600g/m2 for grammage.
Solid Bleached Board (SBB)
Solid Bleached Board is made exclusively from bleached chemical pulp. It usually has a white pigment coated top surface, comprising 2 or 3 layers and some grades are also coated on the reverse side. SBB has excellent printing, structural design and embossing characteristics making it ideal for luxury products and for products where preservation of product aroma, flavour and hygiene are critical. Examples of cartons where SBB is used are perfumes, cosmetics, chocolates, pharmaceuticals, frozen foods and cigarettes.
Folding Box Board (FBB)
Folding Box Board (GC1 or GC2) comprises middle layers of mechanical pulp sandwiched between layers of bleached chemical pulp. The top layer, or, liner, is usually white pigment coated in 2 or 3 layers. The reverse side is cream in colour as the back layer of chemical pulp is translucent allowing the colour of the middle layers to show through. FBB can be plastic extrusion coated, laminated with other materials and given other treatments to enhance its appearance and functional properties. A wide range of applications includes cosmetics, chocolate and sugar confectionery, medical and healthcare, toiletries, dry foods, frozen and chilled foods, coffee and tea, biscuits and baked goods, clothing, toys, games and photographic products.
White Lined Chipboard (GT)
White Lined Chipboard has middle layers of recycled pulp made from mixed recovered papers or carton waste. The top layer comprises either pulp made from selected recovered paper or bleached chemical pulp. Selected recovered paper is also used for the back layer. The overall content of recycled pulp varies from about 80% to 100%. The top surface will, typically have 2 or 3 layers of white pigment coating and it is now usual for most WLC to have a layer of white pigment coating on the reverse side and this is known as GT. WLC can be made with a white, grey or, sometimes brown reverse side (back). Plastic extrusion coatings, paper and aluminium foil laminations and other functional coatings are also available. WLC is used in a wide range of applications which includes blister packaging, cereals, dry foods, frozen and chilled foods, detergent powders, confectionery outers, toiletries, household goods, electrical, engineering products, car spares, DIY, gardening, toys and games.
Duplex Board (GD1 or GD2)
Duplex Board is also called as greyboard, due to its double side grey colour. It consists of two layers or plies. The exterior one side of the board often is coated with a bright white appearance to give it a glossy sheen. Coated duplex board one side with a glossy coated surface suit for superior printability. Coated duplex cardboard is sturdy and thin, more water-resistant, customarily used to make boxes for a variety of small goods that require high-quality printability such as Agarbatti boxes, pharmaceutical packaging, paper plates, cigarette packs, and various packaging products.
PLG IMPEX is an importer company in Delhi and imports high quality of Carton boards from Europe, North America and South America to cater to the demand in the Indian market.