In the field of label printing and production, the continuous progress of technology drives the change of the industry. Bottomless label coater as an innovative equipment, is gradually changing the traditional label production mode, for the industry to bring higher efficiency, lower costs and more environmentally friendly solutions. Principle of operation The working principle of the backingless label coater is based on a unique coating and laminating technology. The machine first unwinds the label material (e.g. paper, film, etc.) by means of an unwinding device and feeds it into the coating area. In the coating area, a special applicator head applies the adhesive evenly to the back of the label material. Unlike conventional label coating, the backing paperless label coater does not use a backing paper to carry the adhesive, but a special transfer coating method. The coated label material then enters the lamination area, where it is briefly bonded to a peelable release film. This release film acts like a traditional backing paper, preventing the adhesive from sticking to each other during storage and transport of the label. When the label needs to be used, the label can be separated from the release film by a simple peeling action and is easily and quickly attached to the target object. Structural features Unwinding and winding system: Equipped with high-precision unwinding and winding devices, it can accurately control the conveying speed and tension of label material and release film. Through the automatic tension adjustment system, it ensures that the material always maintains a stable running state during the whole production process, avoiding problems such as wrinkles and stretching deformation, and guaranteeing the quality of coating and lamination. Coating system: The coating head is one of the core components of the bottomless paper label coater. Common coating methods include gravure coating, anilox roller coating and so on. 

These coating methods can accurately control the amount of coating and the uniformity of coating according to different adhesive properties and label coating requirements. For example, gravure coating can achieve high-precision coating, which is very suitable for some label application scenarios with strict requirements on adhesive thickness; whereas anilox coating is characterised by fast coating speed and high efficiency, which is suitable for large-scale label production. Laminating and Peeling System: The system is responsible for laminating the adhesive-coated label material with the release film and achieving label peeling when needed. The laminating device uses a special pressure adjustment mechanism to ensure that the label material and the release film are tightly adhered to each other without causing damage to the label. The peeling device is designed to facilitate manual peeling by the operator or to be connected to automated labelling equipment for efficient label application. Drying and curing system: Because adhesives need a certain drying or curing process after coating, the bottomless label coater is usually equipped with a corresponding drying and curing device. For water-based adhesives, hot air drying is generally used, by controlling the temperature and air volume of the hot air, so that the adhesive dries quickly.

 For some special adhesives, such as UV curing adhesive, it is equipped with UV curing lamp, using ultraviolet radiation to make the adhesive curing quickly, to improve production efficiency. Application Scenarios Logistics and Warehousing: In the logistics industry, bottomless paper labels are widely used for the identification and tracking of goods. The lightweight design of bottomless labels reduces the overall weight of the label and lowers logistics costs. At the same time, its easy to paste and peel characteristics, making the use of labels more convenient and efficient in the process of goods sorting, transport and warehousing. For example, in e-commerce warehouses, bottomless paper labels can be quickly affixed to commodity packages for easy code recognition and inventory management. Retail industry: Used for price labels and promotional labels for merchandise. The cost advantage of bottomless paper labels allows retailers to reduce the cost of label production, while their aesthetic appearance and good adhesion performance can meet the needs of retail merchandise display. In addition, when promotional activities frequently change labels, bottomless labels can save a lot of time and manpower with their quick-change and paste characteristics. Food and beverage packaging: Bottomless labels are also widely used in food and beverage packaging. As it does not use the backing paper, reducing the consumption of paper, in line with the concept of environmental protection. At the same time, the bottomless paper label can be well adhered to the food packaging material, and in a humid environment (such as refrigerated beverage packaging) can also maintain stable adhesive performance, will not easily fall off.

       Advantages are significant Cost reduction: the elimination of the backing paper in traditional labels greatly reduces the cost of raw materials. At the same time, due to the light weight of the bottomless paper label, it can also save a certain amount of money in the logistics and transport process. In addition, the high-speed production capacity of the bottomless label coater improves production efficiency and further spreads the equipment investment cost. Environmentally sustainable: Reduced use of paper reduces the consumption of forest resources, in line with global environmental trends. At the same time, bottomless paper labels are easier to recycle after use due to their simple structure, reducing the generation of waste. Efficient and Convenient: Bottomless labels are more convenient to paste, do not need to peel off the backing paper operation like traditional labels.

        In the automated labelling equipment, bottomless labels can achieve faster labelling speed and improve production efficiency. Moreover, its good fitting performance makes the labels in different shapes and materials can be firmly pasted on the surface of the object. Development Trend As the market demand for environmentally friendly and efficient labelling solutions continues to increase, the application prospects of bottomless label applicators will be even broader. In the future, equipment manufacturers will continue to optimise the performance of equipment, improve coating accuracy and production speed, and reduce equipment costs. At the same time, the development of new adhesives and label materials to meet the higher requirements of different industries on the performance of the label. For example, developing labels with stronger weather resistance, water resistance and antibacterial properties, and expanding the application of bottomless paper labels in outdoor, pharmaceutical and other fields. In addition, with the development of Internet of Things (IoT) technology, bottomless paper labels may also be integrated with smart chips and other functions to achieve more advanced product traceability and management. 

With its unique working principle, structural advantages and wide range of application scenarios, the bottomless paper label coater is becoming an important development direction in the field of label production, bringing better quality, high efficiency and environmentally friendly label solutions to various industries.