Common post press surface treatment technologies include:

       Apply wax on the surface. It is mainly used in the packaging of fresh meat and agricultural and sideline products in the past to make the packaging bear certain moisture and moisture. This is to complete the wax coating process on the curtain flow coater.Post Press Surface Treatment Technology And Equipment

       Film covering. After the packaging products are printed, plastic films such as propylene are covered on the surface of the printed products, and the adhesive is heated and pressurized to bond them together to form a printed product integrating paper and plastic.Post Press Surface Treatment Technology And Equipment

      Film coating can be divided into instant coating and pre coating. That is, the coating film is coated with adhesive during operation, and then hot pressed to obtain the finished product. Precoating and laminating is that the adhesive is precoated on the plastic film, dried and rolled, and only needs hot pressing when covering the surface of printed products.Post Press Ssurface Treatment Technology And EquipmentPost Press Surface Treatment Technology And Equipment

      Glazing. Glazing is to apply (or spray or print) a layer of colorless transparent coating on the printing surface of Baolv, so as to form a thin and uniform transparent bright layer on the printing surface after leveling, drying and calendering. It is completed by polishing machine and calender.Post Press Surface Treatment Technology And Equipment

      Calendering. Calendering is a modification process after polishing the printed matter, and some directly calender the high-grade paper products. The calendering of printing materials is because the gloss of polishing materials after natural leveling and drying is not ideal. Calendering must be carried out for some fine printing materials. The equipment used is a calender, and many calenders are used together with a polishing machine.Post Press Surface Treatment Technology And Equipment

       Other special treatment technologies. In recent years, there are many special post press processing technologies for printed matter, which have developed rapidly. Common are surface gluing (also known as glue spraying), surface sanding (also known as sanding, that is, uniformly grinding hemp sanding points on the surface of printing), embossing, embossing (concave) or pressing for short. All these new post press finishing technologies have been widely used in high-grade packaging. Especially on exquisite handicrafts and cigarette packaging.Post Press Surface Treatment Technology And Equipment

2、 Technology development and demand

       Packaging post press surface treatment technology has become the intersection of many disciplines and technologies.Post Press Surface Treatment Technology And Equipment

      Packaging post press technology has changed from the traditional wax coating or film coating to the cross technology of combining the surface shape and mechanical characteristics of printed matter.Post Press Surface Treatment Technology And Equipment

      The traditional wax coating does not change the shape of printed matter (before surface modification), only the wax juice is coated and attached to the surface of printed matter.Post Press Surface Treatment Technology And Equipment

 New materials are constantly applied to surface finishing

      With the improvement of people’s requirements for print quality and decoration performance, many new materials are applied to the surface finishing process of print. The new materials widely used in the surface finishing of printed matter are mainly various inks and coatings with unique properties.Post Press Surface Treatment Technology And Equipment

      With the rapid development of Printing Science and technology, printing has completely changed the traditional concept of reproduction. Modern printing is a combination of technology and art. It is based on the information process based on high-tech. at the same time, it uses high-tech means to make printed matter more beautifying. The material basis of this beautification effect is the special performance ink and less material. Post Press Surface Treatment Technology And Equipment

      For example, UV curable coatings have been used for printing surface finishing to replace traditional waxing and coating. For another example, imitation gold and silver inks and coatings have been used to replace gold and silver stamping. In particular, the emphasis on the exquisite packaging effect of some high-grade tobacco and wine, high-grade cosmetics and high-grade gifts and clothing is that some traditional decorative inks and coatings are difficult to meet the requirements, and have more ridiculed requirements for new decorative inks and coatings.Post Press Surface Treatment Technology And Equipment

      It requires high production efficiency, good printing adaptability, fast drying speed, high gloss, high covering power, good adhesion, durable and wear-resistant, safe use, no screen (hole), easy cleaning, no pollution and so on. In view of these performance and requirements, UV curing ink has been introduced at home and abroad recently, and is widely used in high-grade tobacco and wine, gifts, greeting cards, invitations, calendars, business cards, advertisements, art paintings and other high-grade packaging boxes (bags). For a long time in the future, Xinte ink and coating will still be the research focus of surface finishing materials.Post Press Surface Treatment Technology And Equipment

The updating speed of post press finishing technology and equipment is accelerated

      Post press surface finishing technology has developed rapidly. In the past, surface waxing has long been replaced by surface coating, and the surface coating has been partially replaced by surface polishing (polishing solution) not long ago.

      In the past, the general glazing drying was heated by far-infrared heater (or ordinary heater), which has the disadvantages of slow chemical speed and easy deformation of products. Recently, UV curable coatings and inks have been rapidly popularized and applied, and there is a trend to gradually replace film coating and infrared heat curable coatings.Post Press Surface Treatment Technology And Equipment

      At present, the varieties and specifications of packaging, printing and post press surface finishing machinery and equipment in China have been diversified, and the number has reached more than 100. In the past, some major models and models were imported. After years of digestion and absorption, most models have been able to design and produce by themselves. With the application and promotion of high technology, some old equipment and processes have been gradually eliminated.Post Press Surface Treatment Technology And Equipment

      For example, the surface wax coating equipment and processes have been gradually replaced by film coating or polishing process. Therefore, the curtain flow wax coating machine has basically stagnated, and few manufacturers reproduce.Post Press Surface Treatment Technology And Equipment

      With the diversification of printing products, especially the increasing consumption of various exquisite gifts for small crafts owners, some small printing equipment and accessories have a broad market and form a new application field. For example, multi-functional glue (glue spraying) machine has become a hot commodity in the current market.Post Press Surface Treatment Technology And Equipment

      The functions of this glue passing machine include: speed adjustment, humidity and pressure control, LCD, pre calibration function, bottom mounting equipment, general glue passing and cold glue passing adjustment, etc. Some glue passing machines can also realize color hot word pad printing and mounting.Post Press Surface Treatment Technology And Equipment

      They can achieve ideal results in posters, inkjet printed documents, leaflets or large maps. In addition, other printers with origami binding and bar code label have also entered the market in batches and become post-processing equipment.Post Press Surface Treatment Technology And Equipment

 Problem analysis

1. Technical and performance issues

      There is still a considerable gap between China and the developed countries in terms of packaging printing surface finishing technology and equipment, especially in terms of automation, viability and adaptability of relevant technologies and equipment. From the perspective of technology and equipment application, we are still in the initial stage.Post Press Surface Treatment Technology And Equipment

      As for the technical problems of film coating equipment, there are still some problems in domestic equipment and adhesives to varying degrees, such as deformation, durability and separation of film and base paper. Post Press Surface Treatment Technology And Equipment

      In addition, the polishing and glue spraying technology and equipment of packaging printing surface have become the mainstream of packaging surface finishing technology and equipment abroad, and our mainstream is surface coating, all of which we need to solve.Post Press Surface Treatment Technology And Equipment

Equipment model and size

      Because many modern commodities win in the competition by relying on their characteristics and personality, and the best-selling cycle of a product is shorter and shorter, and the renewal is faster and faster, it is not very possible for enterprises engaged in packaging surface finishing to achieve a large scale, which depends more on small and medium-sized enterprises. Therefore, while improving the reliability of the equipment, the equipment model tends to be more small and medium-sized to adapt to the changes of the market.Post Press Surface Treatment Technology And Equipment

 Energy saving

      Printing equipment includes post-processing equipment. The main energy consumption is its transmission and heating system, and the heating (drying) system accounts for a greater proportion of energy consumption. Heating and drying are mostly electric heating. In the past, many equipment used ordinary electric heating tubes (wires) for heating, which has high energy consumption and high cost.Post Press Surface Treatment Technology And Equipment

      Energy saving and cost reduction is the enterprise’s goal from beginning to end. Now, some equipment have adopted advanced heating and conduction methods, such as chemical heat transfer fluid, infrared heater, ultraviolet heater, etc.Post Press Surface Treatment Technology And Equipment

Function and adaptability

      Different materials have different properties and effects. Such as glazing, some use plastic substrate, some use paper substrate, and some use synthetic substrate, which does not require its equipment to meet the glazing of these substrates and achieve the required effect. In addition, there are water-based, oily, solvent-based and so on.Post Press Surface Treatment Technology And Equipment

      In addition, a new type of polishing liquid with special properties has been emerging, so the finishing equipment should meet the finishing requirements of these materials, which requires the equipment to have a wide range of adaptability. In addition, enterprises are required to occupy as few equipment and sites as possible and complete as many finishing operations as possible to reduce processing, storage and transportation costs.Post Press Surface Treatment Technology And Equipment

      As a result, multi-functional glazing calender, film coating calender, calendering concave molding machine, glazing die-cutting machine and so on have appeared one after another.Post Press Surface Treatment Technology And Equipment

Reliability issues

      Reliability is the first consideration in the design of any packaging and printing equipment. The fierce market competition requires that the equipment can be quickly adjusted according to the customer’s product requirements, and different devices and mechanisms can be replaced.

      It can be operated conveniently, controlled and operated reliably, so as to improve the accuracy and efficiency of processing.Post Press Surface Treatment Technology And Equipment

      Surface finishing technology has been applied to various non professional fields. For example, many people use all kinds of daily necessities, cultural supplies, decorative supplies and handicrafts. They do not have professional skills and are not as handy as professionals.

      This requires mature technology and reliable equipment. Reliability is an important guarantee for the extension and penetration of packaging and finishing equipment and technology to other industries and fieldsPost Press Surface Treatment Technology And Equipment