Cartonboards Cartonboard is a multilayer material usually with three or more layers (or plies) of cellulose fibre (pulp) derived from wood. The top layer usually has a white pigmented coating. The reverse may also be coated or may be white, brown, cream or grey depending on the fibre used. Cartonboard is defined by Grammage – the weight of a square metre in grams, or g/m², and by thickness in microns, MU, that is 1000ths of a millimetre. Most Folding cartons use board in a Grammage range 200-500 g/m² and thickness from 350 to 800 micron.   Folding Boxboard (FBB) FBB has a wide range of applications which include cosmetics, chocolate and confectionery, medical and healthcare, toiletries, dry foods, frozen and chilled foods, tea and coffee, biscuits, baked goods, clothing, toys, games and photographic products.   FBB CONSTRUCTION: Folding Box Board (FBB) – comprises of 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 (manilla) as the back layer of chemical pulp is translucent allowing the colour of the middle layers to show through. The back layer of chemical pulp may be thicker and/or be white pigment coated, in which case the board is known as White Backed Folding Box Board (WBFBB). FBB can also be plastic extrusion coated, laminated with materials such as aluminium foil and greaseproof paper and be given grease resistance (GRFBB) and other functional treatments.   White Lined Chipboard (WLC) WLC has a wide range of applications which include shoe boxes, display outers, shoes, toys and non-food products. WLC CONSTRUCTION: White Lined Chipboard (WLC) – has middle layers of recycled pulp made from mixed recovered papers or carton waste. The top layer comprises either pulp made from selected recovered papers or bleached chemical pulp. Selected recovered paper pulp 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 to have a layer of pigment coating on the reverse. WLC can be made with a white (WBWLC), grey or, sometimes, brown reverse.   Solid Bleached board (SBB) 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. SBB CONSTRUCTION: Solid Bleached Board (SBB) is made exclusively from bleached chemical pulp. It usually has a white pigment coated top surface in 2 or 3 layers and some grades are also coated on the reverse. . Solid Unbleached board (SUB) SUB is used where either a very high strength (puncture, tear, etc.) or good wet strength properties are required. It is also referred to as Carrier Board since in addition to folding cartons it is used for multipack applications in canning and bottling. The main end use for this type of board is for packaging of frozen or chilled food, beverage carriers, detergent, cereals, shoes, toys, etc. SUB CONSTRUCTION: Solid Unbleached Board (SUB) is usually made entirely from unbleached chemical pulp and is brown in colour. For many carton applications the printing surface either has a white pigment coating or a bleached chemical pulp top layer plus coating. It is also known as SUS (Solid Unbleached Sulphate).   Corrugated Cardboard Also known as Corrugated Fiberboard, or Combined Fiberboard Architects have known for thousands of years that an arch with the proper curve is the strongest way to span a given space. The inventors of corrugated cardboard applied this same principle to paper when they put arches in the corrugated medium. These arches are known as flutes and when anchored to the linerboard with a starch-based adhesive, they resist bending and pressure from all directions.   Corrugated, or Combined, Fiberboard has two main components: the linerboard and the medium. Both are made of a special kind of heavy paper called containerboard. Linerboard is the flat facing that adheres to the medium. The medium is the wavy, fluted paper in between the liners. Flutes come in several standard shapes or flute profiles (A, B, C, E, F, etc.). Generally the larger flute profiles give greater vertical strength and cushioning. The smaller flutes help enhance graphic capabilities while providing greater structural integrity. Different flute profiles can be combined in one piece of combined board. For instance, a doublewall board can use a B/C flute combination. By experimenting with flute profiles, designers can vary compression strength, cushioning strength and thickness. A - Flute Corrugated Cardboard A-flute was the first to be developed and is the largest common flute profile. It has 33 flutes per linear foot and is used for very fragile goods as it has great shock absorbency. It ranges between 4.5 - 4.7mm in thickness. B - Flute Corrugated Cardboard B-flute was next to be developed and is much smaller. It has 47 flutes per linear foot and is high shock absorbency packlaging with optimal levels of crush resistance. It ranges between 2.1 - 2.9mm in thickness. C - Flute Corrugated Cardboard C-flute followed the development of A & B and is between A and B in size. It has 39 flutes per linear foot and it ranges between 3.5 - 3.7mm in thickness. E & F - Flute Corrugated Cardboard E-flute is smaller than B flute and has 90 flutes per linear foot and it ranges between 1.1 - 1.2mm in thickness. F flute is smaller again. Single-Faced Corrugated Cardboard When quality printing needs to be applied a white liner is adhered to one side of the corrugated cardboard. This is known as single faced corrugated cardboard.   CLICK HERE FOR MATERIALS FOR PACKAGING on www.technologystudent.com