What is the 'core' of typical mattress

Nowadays, most of the mattress is made according to the standard size. The initiated by industry, used to solve manufacturing company with manufacturing mattress of the bed of any size difference between companies. Size including double bed, 39 inches wide, 74 inches long; Double bed, 54 inches wide, 74 inches long; Big bed, 60 inches wide, 80 inches long; And king-size bed, 78 inches wide, 80 inches long. 'Core' is a typical mattress built-in spring unit, a series of coil, through additional wires connected to each other. Interior layer is fixed on the built-in spring: the first is called insulators, installed directly on the built-in spring, prevent the next layer ( Buffer) Shape to the coil. Although insulators is fairly standard, but the number of buffer layer can change in the quantity is large, ranging from 2 to 8 layer, thickness from 14 inches to 2 inches ( 63 to 5 cm) 。 Moving outward, flange, the next component is connected to the mattress quilting connecting plate on the cover, large round nails with called a pigsty. The top and bottom of the mattress and side plate with borders tape stitched together. Although various spring design, to meet the special needs and situation, four commonly used coil is bonnell, the offset, in the shoot, as well as handheld system. Spring is an hourglass, knot at both ends. Offset is also an hourglass design, but its top and bottom is flat, so that the coil hinged between the action.