Cardboard

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cardboard

[′kärd‚bȯrd]
(materials)
A good quality of chemical pulp or rag pasteboard made by combining two or more webs of paper, either with or without paste, while still wet; used for signs, printed material, and high-quality boxes.

Cardboard

 

a variety of paper that differs from ordinary paper in its greater quantity of paper pulp per unit area. There is no uniform international classification that makes a sharp distinction between paper and cardboard. For example, in the USSR, cardboard is the term for paper matter with more than 250 g of pulp per sq m; in the German Democratic Republic, more than 150 g/m2; and in Poland, more than 180 g/m2.

The operations in the production of cardboard are beating, molding, pressing, and drying; they do not differ in principle from similar operations for making paper, although material with coarser and stiffer fibers (such as brown wood pulp, hemi-cellulose, sulfate pulp, and waste paper) is more frequently used as raw material to make cardboard.

Types of cardboard include packing, printing, footwear, electric-insulation, and millboard. Packing cardboard is used to make boxes and cartons. Types of printing cardboard are binder’s board (for making book bindings and clean products), matrix board (for making matrices for molding stereotypes), and ticket cardboard. Types of millboard include facing board (for facing dry gypsum plaster) and wallboard (for covering building walls). Types of industrial cardboard are fitting board (for making sealing gaskets), sound-deadening and thermal-insulation cardboard, and waterproof and filter board.

Cardboard is made on cardboard machines. A distinction is made between single-ply and multi-ply cardboard. The layers of multi-ply cardboard are usually prepared from fibers. The inner layers are molded from cheaper compositions; the outer layers are molded from more durable and expensive fiber (for example, the inner layers of most types of box cardboard are molded from white pulp with a small amount of cellulose added, from waste paper, or from other cheap fibrous materials; the outer layers are made of bleached or unbleached sulfate pulp).

The properties of cardboard are evaluated by a series of general and special technical parameters. The general parameters include mass per square meter, thickness, and moisture content. The special parameters include absorbent capacity, electric-insulation properties, and deformation upon moistening and drying. The required properties for each type of cardboard are provided by the selection of the proper intermediate products, by their treatment, and by the introduction of adhesives, binders, fillers, and dyes into the cardboard, and by the application of polymer films and metal foil to the surface of the cardboard.

REFERENCES

Lapinski, J. KartonodelateVnye mashiny. Moscow, 1966. (Translated from Polish.)
Legman, G. Osnovy tekhnologii pererabotki bumagi i kartona. Moscow, 1968. (Translated from German.)

M. M. KOTIK

References in classic literature ?
Please turn that cardboard face down, and take this one, and compare it searchingly, by the magnifier, with the fatal signature upon the knife handle, and report your finding to the court.
Her dresses overflowed the wardrobe and her room; large, flat, cardboard boxes were to be found in every corner of the upper floors.
Piles of cardboard boxes, such as milliners and dressmakers use in Europe, cumbered the corners; and by some means he had procured for himself the sort of furniture that might have come out of a respectable parlour in the East End of London --a horsehair sofa, arm-chairs of the same.
He emitted a faint moan from behind a pile of cardboard boxes on the table, which might have contained gloves or handkerchies or neckties.
There were as many Cardboards shipped in 2016 as the first two years, which shows accelerating adoption.
The success of Google Cardboard is proof that there is interest in VR.
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The company was founded 106 years ago, and has 18 plants (17 in Brazil and 1 in Argentina) and it is the leader in the production of papers, cardboards for packaging, corrugated cardboard boxes, industrial bags and timber.
The paper, extracted during the first phase of the recycling process is transformed into cardboard by Klabin.
Tetra Pak is an organization that operates in over 165 countries, producing integrated systems for processing, bottling, distribution and cardboard packaging for food such as milk and dairy products, juices, coconut water, teas, tomato by-products, creams, sauces and others.