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.

It should be noted that the laminate causes partial obstruction of moisture penetration and does not make the sack waterproof in any way. If you want to prevent more moisture, it is usually recommended to use nylon inside the sack.

The laminate machine is responsible for 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 the Mardon extruder, and pours it on the sack to the specified thickness, which is usually in the range of microns. 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 stick firmly to the surface of the sack and produce the final quality product.

Using the laminating machine, cellophane rolls or so-called OPP and even paper can be glued to the surface of the sack, 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 glued together. This gar makes the sack strong and gives a special beauty to the sacks