How much do you know about Laminating machine paper lamination? In fact, paper lamination is a process of coating the surface of paper with a film through an adhesive, which is widely used in the field of printing and packaging.
Laminating machine coating method
1. Laminating machine oily coating method
Laminating machine oil-based laminating method, with solvent-based polyurethane, alcohol-soluble polyurethane or alcohol-soluble acrylic and other solvent-based laminating adhesives as the main adhesive, mixed with toluene and ethyl acetate in a certain proportion, diluted, coated and dried, and then laminated. The toxicity and use safety problems of type laminating adhesives are becoming more and more prominent, and people are more and more aware of the harm caused by solvent-based laminating adhesives. Laminating machine oil-based laminating methods have basically withdrawn from the laminating market.
2. Laminating machine water-based coating method
The water-based laminating machine uses water as the solvent and acrylate as the main component. The water-based laminating method of the Laminating machine is healthier and more environmentally friendly than the oil-based solvent-based glue. Water-based lamination is divided into two types: wet lamination and dry lamination. Laminating machine wet lamination coats the glue directly on the paper, and then cuts it after drying naturally. The advantage is high efficiency, but the disadvantage is that the paper absorbs water. The deformation is large, and the length of the tail film after slitting is not conducive to the paper mounting and die-cutting in the subsequent process. Laminating machine dry lamination is laminating after glue, and the paper is flat and no tail lamination. The defect is that it consumes a lot of electricity during the drying process. It is currently the most popular laminating process in the Chinese market.
3. Laminating machine solvent-free coating method
Laminating machine solvent-free laminating method needs to use solvent-free laminating adhesive. It is a kind of polyurethane adhesive, referred to as PUR glue. The full name is moisture-curing reactive polyurethane hot-melt adhesive. The polymer reacts with moisture in the air, curing and crosslinking to form a stable chemical structure. It has strong adhesion with paper fiber, good resistance to high cold and high heat, and can be stored for a long time. Different from traditional hot melt adhesives, because it contains chemical functional groups when it is melted, it will react with moisture in the air to form an irreversible substance, that is, it cannot be melted twice.
Laminating machine classification
Laminating machines can be divided into various types according to different classification standards. The following are several common classification methods:
The laminating machine can be divided into a semi-automatic laminating machine and a fully automatic laminating machine according to the operation. The former is a manual operation, including paper reading, cutting, and delivery; the latter is automatic operation, which is convenient and efficient to operate;
According to equipment, laminating machine can be divided into an instant coating laminating machine and a pre-coating laminating machine;
The process, it can be divided into laminating machines, wet laminating machines, and a pre-coating laminating machine.
Advantages of Laminating machine
01High efficiency, the laminating machine laminating speed is up to 80-100 m/min, and it can achieve a laminating speed of 10,000 sheets per hour (depending on the paper size). It is easy to operate, highly automated, and greatly reduces labor costs.
02Low cost, the glue dosage is only 2-5g/square meter (depending on the paper smoothness and printing ink volume, and other conditions), under the same quality, the cost of Laminating machine glue is much lower than that of traditional water-based lamination.
03Energy saving, the operating power of the equipment is only 25kw, and the power consumption of the Laminating machine is only about 1/4 of the automatic water-based laminating equipment (under the same production capacity), or even lower.
04Original hot knife slitting technology, the Laminating machine adopts a high-temperature hot knife of 500 degrees Celsius, and the entire film is fused without film residue. Laminating machine is widely used in PET/OPP/PE/PP/PVC/Acetate, Nylon, and other kinds of films.
The above is all about the laminating machine today. The laminating methods of the laminating machine mainly include water-based, oil-based, and solvent-free laminating methods; in addition, the laminating machine can be divided into different types according to different classification methods.
I hope the above content can help you better understand the laminating machine, more information will be continuously updated, see you in the next issue.
Post time: Jun-24-2022