Post-printing considerations for Polylith synthetic paper printing

Cut paper

Polylith synthetic paper can easily achieve the same cutting accuracy as paper, and the paper cutter should be sharp. In addition, since the synthetic paper has a certain compressibility, a lighter clamping pressure should be used.

Die cutting

Die-cutting knives used for die-cut synthetic paper should be quenched and hardened to have a Rockwell hardness of at least 55 degrees, while plain paper uses a blade hardness of 45 to 48 degrees. Choose from the famous die cutter suppliers Austrian Bauer and Swedish Sandvik products. In the selection of the cutting edge angle, the standard 60 degree blade angle can be selected for die-cutting thin materials; the blade angle of 52 degrees can be selected for materials with thickness of 0.008-0.014 inches; 42 is recommended for materials with thickness exceeding 0.014 inches. Degree of blade angle.

Drilling, punching, bending

Polylith synthetic paper can be drilled, punched and bent. The cutting knife should be sharp enough because the irregular edge of the paper cut by the blunt knife will greatly reduce the initial tear strength. During the drilling and bending process, the heat generated causes the synthetic paper edge to melt, and in order to reduce the amount of heat generated, an additional short residence time can be added. The drill bit should be kept sharp and the stacking height should not exceed 1 inch when drilling.

folding

Polylith synthetic paper can be folded on a regular folding machine like the same loose paper. In the production of books and periodicals, synthetic paper can be folded into 16 pages or less. If the number of pages is more, a certain experiment is required.

Indentation

Synthetic paper cannot be indented like normal paper. It must be ensured that the indentation is carried out in the transverse direction, not in the longitudinal direction.

Binding

Polylith synthetic paper can be wirelessly stapled using a suitable hot melt adhesive. To improve the adhesion, you can engrave some grooves in the spine. Polylith synthetic paper can also be stitched using a coil, but it is especially careful when punching and punching. Polylith synthetic paper can also be saddle stitched on a lock binding machine.

Bonding

Polylith synthetic papers can be bonded to each other or to other materials. The binders that can be used are synthetic resin binders, solvent-based binders or hot-melt binders.

Heat sealing

Polylith synthetic paper itself can be heat sealed. At 150 ° C, the sealing strength can reach 1563 grams. Different types of synthetic paper can be selected for different heat sealing processes.

Coating and glazing

(1) Using 100% solids ink, the mineral oil content should not exceed 3% and can be dried by oxidation.

(2) If the graphic is to be coated or embossed, a wax-free ink is required;

(3) Use a new ink with a higher color strength;

(4) When coating or gluing, it is necessary to perform compatibility test on the printed synthetic paper under the conditions of final use.

(5) Polylith pre-coated synthetic paper can be applied in-line using an aqueous coating. However, on-line aqueous coating is not recommended for non-precoated synthetic paper unless the press is properly tuned to ensure effective drying.

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