Rolls
The process for the manufacture of masking tape begins with long rolls of plastic, paper, or other material. Although the adhesive is an important factor in the manufacture of masking tape, the choice of the roll of material is critical to the quality of the final product.
The roll of material is loaded onto the unwinder from which the material is unloaded to production. As one roll finishes, a new roll is immediately placed on the unwinder to avoid delays in production. A tension adjuster makes sure that the material is fed evenly and does not tear or rip. During the unwinding process, a solvent may be applied to certain materials, such as plastics, to keep them from sticking during unrolling.
Hot melt is the adhesive that will be applied to the unwinding roll and is a mixture of various substances to form rubber, synthetic, acrylic, or silicone adhesives. The hot melt is loaded into a holding tank that is kept at 200%deg; C to keep the mixture in liquid form.
The hot melt is fed onto the roll of material from the gluer that evenly applies the adhesive. Once the adhesive is applied, the glued material passes over a cooling roller that hardens the adhesive. To ensure that the coat of adhesive is even, it is checked by a computerized sensor that passes over the sheet of material.
The rewinder unsplices the rolls of material and rolls it into a large roll similar to the original roll of material. Once the rewinder is full, it is disconnected for the next spool to begin.
The slitter has blades that divide the large rolls into strips that vary in width according to the size of the masking tape being produced. The width of the tape is programmed into the slitter, which has to be carefully monitored to avoid problems with cutting angles, lateral load, and wear on the blades. From the slitter, the strips are wound onto cardboard cores in varying lengths according to the design of the masking tape.
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