The temperature control of the laminating process of the pre-coating and pre-coating machine also affects and determines the hot-melt adhesive used for laminating to solve the changes when heated, and the resistance to the new heat. Therefore, strict temperature control is the primary key to the pre-coating film machine. According to the practical process, it is found that the quality of the pre-coating laminator is mainly affected by three factors: temperature, pressure, and speed. Therefore, the relationship between the three is correctly handled to ensure the quality of the pre-coating laminator and to the production process of the next process. The impact is very important. The paper-plastic coating will be the comprehensive result of the physical function of thermocompression. Temperature, pressure, and speed are the three basic factors for achieving this physical comprehensive effect. Correctly handling the relationship between the three is the process operation. The key to technology.
        Temperature is the first key to laminating. The adhesive used for pre-coating is hot-melt adhesive. Temperature determines the melting state of hot-melt adhesive, the leveling performance of hot-melt adhesive, and the molecules of hot-melt adhesive to the film. , The printing ink layer, the paper substrate and other three molecules of the diffusion capacity of molecules, but also determines the crystallinity of the hot melt adhesive, only the correct control of the temperature of the working area can make the pre-coated film on the film of solid hot melt adhesive The layer is completely melted into a viscous state, with suitable fluidity to achieve wetting and bonding to the surface of the printed matter, and at the same time to ensure immediate solidification after compounding, so that the laminated film product has a smooth appearance, bright enough, and the adhesive layer is melted well without folding mark. And can peel the ink.

        The hot film of the hot laminating machine relies on the intimate combination with the surface of the paper and is packaged in a roll package. The hot film used by the hot laminator is thinner and softer. The paper after the hot film is not as hard as the plastic film. The paper is still flexible and can be curled. There is no need to worry about over-plastic curling when using a laminator, but cold laminators and single-sided hot laminators are prone to warp for thin paper lamination (unless a professional, high-cost anti-roll single-sided is used Hot film), if the paper is curled and then unfolded after cold lamination, bubbles and wrinkles may appear. Single-sided cold lamination is also easy to curl the paper, and the laminating curling is also used with the functions of temperature and speed adjustment of the hot laminator. There are relationships.
        On the one hand, in the field of membranes, seeking high-performance membranes in a wide range of industrial fields, the development of new raw material resins, the development of processing technologies such as compounding and multi-layering are currently prevalent. However, global issues such as energy saving, from the perspective of the environment, the use of membranes in parallel with solvent-free membrane technology and energy-saving manufacturing methods in terms of electron beam irradiation. Film-coated steel sheets are aimed at the industrial field, and are related to IT and optics, automotive, and building decoration, and other fields, and are widely used. Examples of specific contents are film production method, physical properties, durability, other characteristics, etc.

        The effect of laminating directly affects the quality of the printed matter and directly affects the interests of customers.
        The pre-coating film laminating machine melts the glue by heating, and then adheres the film to the printed matter by pressing. The single-sided film curling of the small pre-coating hot laminating machine has always been a headache, so hot What is the reason for the single-sided film curling of the laminating machine?
        After many times using a small pre-coating hot laminating machine to test the printing of various materials, we found that the single-sided lamination curled, generally curled in the direction of the film, and could not be kept flat, wrinkled. If the mark is serious, it will automatically curl into a cylindrical shape, which will affect the effect of the subsequent process. The main reasons for single-sided film curling:
        1. The coated paper is too thin; although the current laminating machine is suitable for laminating paper prints of a variety of materials, the thinner the paper, the easier it is to deform and curl
        2. The paper has much water content and high humidity; the paper is loose and flat. Laminating machine should also pay attention to the direction of the paper strands, especially thick paper, to reduce the phenomenon of paper curling caused by rolling and stretching.
        3. The pressure during lamination is high, the temperature is too high, and the time is too long. The current working temperature and working speed of the hot laminating machine can be adjusted freely. For the lamination of various printed products, the temperature should be selected and set according to different materials. And speed.
        The quality standard of film-coated products: the surface is clean, flat, not blurry, good finish, no wrinkles, no foam, no paper-plastic separation, no powder foil marks. The degree of drying is appropriate, and there is no phenomenon of sticking the surface film or paper. Handle the relationship between paper, plastic film and the temperature, pressure and time when passing through the hot pressing mechanism during the laminating process. Pay attention to adjust the temperature, mechanical pressure and mechanical speed of the heat roller to avoid blistering and paper during laminating Problems such as poor plastic adhesion.
        Aiming at the problem that the single-sided lamination of the ordinary small thermal laminating machine is easy to curl and affects the effect of the subsequent process, the newly designed anti-curling laminating machine of the Century Gold Figure after-printing equipment can effectively help customers improve the quality of the lamination and prevent gravity stretching. Roll design, anti-curling function, different gears can be selected according to different thicknesses of media, to ensure the smoothness of the product after lamination, greatly improve the grade of laminating products; the overall adjustment of the pressure and height of the rubber roller on one side; all kinds of paper It can guarantee perfect operation; the upper and lower film rolls and the tension of the left and right sides of the film rolls can be adjusted separately to adapt to different media, different film materials, and different equipment prints, which can achieve the best film effect.

        In today's printed peritoneal technology, part of the color packaging film method is to use biaxially oriented polypropylene film, and the product after the film will appear dull or blistered. There are usually four situations that lead to these two phenomena in laminating products. First, the most important issue is temperature: inappropriate temperature control; followed by insufficient pressure, the amount of glue out of the peritoneum, and the cleanliness of the roller. Great help. The manufacturer of Tongjia laminating machine conducts in-depth scientific analysis and finds a solution to the phenomenon that the laminating product is not bright and blistering. The following is a detailed introduction to you:
        1. Temperature control is not suitable
        When the small laminating machine coats different substrates, the temperature of the electrically heated steel drum must be adjusted according to the coated product. If the coated substrate is gold cardboard, the temperature of the laminated steel cylinder should be controlled at 70-80 ° C; if it is coated with 250g / m2 or 300g / m2 gray whiteboard paper, the temperature should be adjusted to 80-90 ° C. During the placement of whiteboard paper, the moisture it absorbs far exceeds that of gold cardboard. Especially in rainy days and winter, if the temperature is not adjusted properly, the film-covered product will not shine.
        When laminating, sometimes there are obvious water droplets or steam on the silicone roller, which is caused by the paper absorbing a lot of moisture. The film laminating temperature of such products must be raised a little bit more. For general products, the temperature of the drying tunnel can be controlled at 50 ～ 60 ℃, and the glued film can be stuck on the exit of the drying tunnel with fingers without obvious traces, and it can be a little sticky. If the film temperature is adjusted too high, it will foam. Therefore, the temperature of the heating steel drum must be controlled according to the characteristics of the product when laminating.
        Second, the amount of glue
        When using stretched polypropylene film to cover the film, glue must be applied to the film. The amount of glue is applied to a moving film by a transmission steel roller installed in a rubber box through a rotating belt. The amount of glue is controlled by a steel blade that falls on the steel roller. The amount of pressure light glue is large; the amount of pressure heavy glue is small. The amount of glue should be mastered, so that it can be covered evenly, and no crystal points can be produced. If the amount of glue is too large, the covered product will be dull.
        Special attention should be paid to the process of gluing, it is necessary to prevent the tiny particles and foreign objects after the gel solidifies from remaining in the rubber tray. If it is left, it will be picked up by the rubber roller during rotation and stuck on the rubber blade, and there will be a rubber-free white mark here. Therefore, after a long shutdown of the laminating machine, before the laminating machine is started, the laminating pump and the hopper box should be cleaned with laminating water or high boiling point kerosene to ensure that the glue of the upper roller is normally coated on the film without being produced Trace.
        3. Insufficient pressure
        According to the needs of customers, the thickness of the substrate material of the small laminating machine is mostly inconsistent. When laminating, the pressure between the silicone roller and the steel roller should be adjusted according to the thickness of the substrate paper. If the pressure is too low, the film of the film-coated product is not strong, bright, and easy to produce wrinkles; too much pressure will cause film wrinkles and paper deformation.

        Small laminating machines can be divided into two major categories: instant coating laminating machines and pre-coating laminating machines. The pre-coating hot laminating machine is also called a hot laminating machine. The laminating machine is small in size, low in cost, flexible and convenient to operate. It is not only suitable for laminating processing of large batches of printed products, but also suitable for small batch and scattered printed products such as automated desktop office systems. Laminating processing is very promising. Widely used in the mounting work of various modern wedding dresses, art photography, computer spray painting, calligraphy and painting, posters, advertising pictures, renderings, documents, etc., suitable for photo agencies, printing houses, advertising, design and stickers, etc. The investment is small, the effect is obvious, the consumables used are non-polluting, they are green and environmentally friendly products, and the market potential is great.
        Film processing on the surface of digital prints, especially after printing a large area on the ground, and then film processing will help protect the printed matter during post-press processing, especially when cutting or packaging, and enable printing Products are more beautiful and durable. However, it is not necessarily advantageous to apply a single-sided coating on a double-sided printed product, because the uncoated side may be prone to peeling off of the printing color due to friction in the subsequent processing. Many printed products are covered with various bright films, matte films, and matting films in order to pursue distinctive effects. However, it is more appropriate to use thermal lamination for digitally printed products. This method is easy to use and inexpensive.