Laminate is a protective and covering layer that is injected on the sack in different thicknesses. In addition to increasing the strength of the sack, this also prevents the passage of moisture.\r\n\r\nThe laminate machine is in charge of the above task, in such a way that it melts and mixes the raw materials, which are usually a combination of polypropylene and polyethylene, and other additives such as anti-UV, if needed, in its Mardon extruder, and to the determined thickness. It is usually in the range of microns and falls on the sack. This sack is passing with the appropriate speed and tension to achieve a smooth and uniform surface by injecting the material on it. After pouring the material from the mold onto the sack by the press rollers, which have a low temperature due to the cold water passing through them, they firmly stick to the surface of the sack and produce the final quality product.\r\n\r\nCellophane rolls or OPP and even paper can be glued to the surface of the sack with the laminating machine, in such a way that the layer removed from the mold of the laminating machine is placed between the sack and the cellophane or paper layer and the two layers are joined together. pasted This work makes the sack strong and gives a special beauty to the sacks.
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