Layered layering refers to the separation of the layers that are combined together through mechanical or chemical bonding at the interface. Delamination can occur at the interface between PE and paper or between adhesive and silicone fluid. In general, layering is a matter of material and interface. For example, PEK-coated release paper is delaminated because the surface treatment before PE coating is not good. The delamination of the adhesive may be due to the easy peeling off of the silicone oil

 Lowering the zuigao temperature - Reducing the heating rate - Using a release material with better air and water permeability.

Adhesion When the peeling material layers are fused together, it is difficult to unwind without damaging the paper or using high unwinding tension. At this time, adhesions often occur. Adhesion can occur only in one part of the paper, such as the edges, or the entire paper, and can be caused by many different mechanisms. - insufficient curing of silicone oil - uneven moisture content - excessive winding tension; Chemical contamination - insufficient separation force

overheating - limited permeation/dissipation of liquid/vapor components in the system - evaporation of solvents or water

foaming is a kind of damage phenomenon on the surface of the substrate, coating film, glue, etc. Foaming usually occurs when liquids (such as water or organic solvents) or gases (such as air) expand faster than the entire system dissipates its increased volume and pressure. For example, when the PEK release paper on both sides is heated to too high a temperature, the PE will soften, and the vapor pressure of the moisture in the paper is high enough, and the PE will form bubbles, also to release the pressure.

when the adhesive is not on the right side of the substrate, the reverse transfer of the adhesive film will occur; Due to adhesive peeling, unwinding defects will occur. The reverse transfer of the adhesive film can be caused by the following factors: adhesive exudation, uneven moisture content, improper winding tension, insufficient curing, or insufficient release force range of the release material.

Handmade paper is mainly operated by hand, using curtain frames and manual fishing sheet by sheet. Soft texture and strong water absorption, suitable for ink writing, painting and printing, such as Chinese rice paper. Its output accounts for a small proportion of the total production of modern paper. Machine-made paper refers to the general term for paper produced by mechanization, such as printing paper, packaging paper, etc.

There is no strict distinction between the two. Generally, the weight of less than 200g per square meter is called paper, and the above is called cardboard. Paperboard accounts for about 40~50% of the total output of paper, mainly used for commodity packaging, such as box paperboard, packaging cardboard, etc. Internationally, paper and cardboard are usually counted separately.

Packaging paper: whiteboard paper, white cardboard, kraft cardboard, kraft paper, corrugated paper, containerboard, tea board paper, sheepskin, goosebump paper, cigarette paper, silicone paper, paper cup (bag) base paper, coated paper, cellophane, oil-proof, moisture-proof paper, transparent paper, aluminum foil, trademark, label paper, fruit bag paper, black cardboard, color cardboard, double gray paper, grayboard paper.

The commonly used paper is gold and silver cardboard, white cardboard, coated paper, kraft paper, oilproof, double adhesive paper, writing paper, newspaper printing paper, corrugated cardboard and so on.
Cigarettes are made of gold cardboard. The surface has gold tin foil, silver is similar to gold, and the surface has silver tin foil. The hamburger box in KFC McDonald's is white cardboard. And the small paper bag containing chicken wings inside is oil-proof paper, which can be oil-proof, of course, there is good or bad oil-proof performance, the paper containing the burger is PE paper, and the general printing of color brochures is 128g coated paper, both sides are light. Generally, pizza boxes are PE corrugated paper, large cardboard boxes are corrugated, and corrugated has the difference between single tile and double tile.

Uneven seal ink: Some areas may have more or less stamp ink than others, resulting in a less clear stamp pattern. This situation can be solved by adjusting the amount of ink or applying it evenly with a brush.