Development history from BOPA1.0 to BOPA4.0

BOPA film is an industry with rich professional content that cannot be explained in two or three sentences.

Unlike the plastic and chemical commodities, the BOPA market does not have the ups and downs of the fast-changing, but is stable with a little turbulence;

Unlike the retail industry, BOPA industrial products are not well known to the mass consumer groups, and their achievements and reputation are deeply hidden;

Unlike the Internet industry, BOPA technology There is no rapid change, but just doing the same thing day after day.

However, BOPA film is an indispensable product in people's daily lives. Everyone may need BOPA film for their daily necessities. BOPA film is used as a cover material for jelly that is easily torn open. Almost all large packages of washing powder/liquid bags contain BOPA film. The aluminum-plastic outer packaging of lithium batteries for smartphones requires BOPA film. Pickled peppers are packed in vacuum bags. Chicken feet and rice bags, vacuum compressed quilt bags, aluminized balloons, etc., all kinds of general packaging that you may or may not know in life will need to use BOPA film.

      BOPA film meets people's basic living needs. At the same time, the preparation technology of BOPA film has also promoted the development of the entire flexible packaging industry through several technological innovations and upgrades, and even affected human beings' pursuit of a higher level of life.

BOPA 1.0 - Flat Film Stretching Technology
       The earliest nylon film was developed and produced using the tube film method (also known as the blown film method or the double bubble method). It is the earliest simultaneous film and has realized the industrial production of nylon films. The future industrial development of BOPA films has laid a good technical foundation. The nylon film prepared by the blown film method has good balance and high crystallinity, but its shortcomings are also obvious. Due to the limitations of the processing technology of the circular die, the thickness is uneven, the small shaped structure leads to a large thermal shrinkage rate, and its The production capacity is very small. At present, only a few manufacturers in the world continue to use film blowing equipment and produce it in small quantities, which is no longer the mainstream of the market.

BOPA 2.0 - step-by-step biaxial stretching technology
       The step-by-step biaxial stretching method is also called the two-step method (or asynchronous method). The product stretches through two stages: longitudinal stretching and transverse stretching. Compared with the first generation blown film nylon film, the thickness uniformity and high ductility of the nylon film prepared by the step-by-step method have been significantly improved, and the mechanical strength is higher, and the BOPA film prepared by the step-by-step biaxial stretching technology The output has been significantly increased, which has greatly improved the industrial productivity level of BOPA film and greatly promoted the popularization and application of BOPA film in the downstream color printing flexible packaging industry. However, due to the limitations of the stretching equipment and the two-step stretching process, film production will produce a bowing effect, which will be subject to certain restrictions when used in areas that require high flatness in bag making.

BOPA 3.0 - Mechanical synchronous stretching technology
       Mechanical synchronous stretching technology, as the name suggests, completes longitudinal and transverse stretching at the same time, and revolutionary introduction of "water treatment" technology solves the second generation step-by-step bidirectional stretching technology It eliminates the inevitable "bow effect" defect in the process, and the advantages of good balance largely meet the needs of application fields that require high flatness in bag making. However, only a few equipment manufacturers can provide mechanical synchronous stretching production lines, and the preparation technology is monopolistically concentrated in the hands of a few film factories. At the same time, due to the process limitations of the equipment, the "stretch ratio" in the mechanical synchronous stretching method is fixed and cannot be adjusted. , the mechanical strength and balance of the film have not been substantially improved. Therefore, the third generation stretching technology cannot be widely promoted.

BOPA 4.0 - Magnetic levitation linear motor synchronous stretching technology (LISIM technology)
       The so-called magnetic levitation technology, to explain it in a simple way, its principle is equivalent to the technology of Shanghai maglev train and maglev air conditioner. In the stretching stage of the magnetic levitation linear synchronous stretching method, each chain clip They are all controlled by separate linear motors. The most important thing is to overcome the shortcomings of the fixed stretching ratio in the third generation mechanical synchronous stretching technology. Both the stretching ratio and the track can be fully automated and intelligently adjusted, making the magnetic levitation linear synchronous stretching The mechanical strength and balance of the stretched film and many other physical properties have been greatly improved. It can be said that it is the world's leading and perfect generation of synchronous stretching technology at this stage, realizing large-scale industrial production and personalization. The perfect blend of customization.

       Magnetic levitation linear synchronously stretched nylon film can not only meet the requirements of wide-width multi-color high-end exquisite printing that requires strict overprinting accuracy, but also meet the requirements of heavy-duty packaging with high mechanical strength, and can meet the requirements of high-temperature cooking food packaging. Magnetic levitation linear synchronous stretch nylon film will gradually achieve market popularity and help the downstream color printing flexible packaging industry transform and upgrade.

       BOPA film is recognized as one of the most difficult plastic flexible packaging materials to produce. The industry threshold is high and it requires strong control of production equipment. It is quite difficult to mature the biaxial stretching process technology and master the preparation technology. It can be said that the degree has played a key role in the formation of the current domestic BOPA film industry competition pattern.

      The fourth generation magnetic levitation linear motor synchronous stretching production line (LISIM) is provided by Bruckner Machinery Manufacturing Company of Germany. With a width of 6.6 meters, it is currently the most advanced, largest width, fastest speed and largest production capacity BOPA film in the world. production line. Today, the production capacity of the domestic BOPA film industry is more concentrated, with a large proportion coming from several major film factories. Xiamen Changsu, through its own production capacity scale and technological leadership, focuses on laying out and exclusively owning the fourth-generation high-end BOPA film technology, seizing the market. Taking the lead; Cangzhou Donghong continues to develop lithium battery separator products and is making steady progress in the field of BOPA films; while Yuncheng Plastics intends to find another way in the second-generation step-by-step BOPA film market. It can be seen that advantages and high-quality production capacity will dominate the market initiative and voice. Smaller-scale film factories will gradually be marginalized, and it will be more difficult for companies outside the industry that are ready to make a move and successfully gain a foothold here.

        Since 2016, BOPA film has continued the hot market trend last year. Customers in the downstream color printing flexible packaging industry have put forward more stringent requirements for the adjustment and upgrading of flexible packaging structures and the improvement of comprehensive performance of packaging materials. Implicit in the good market fundamentals is that downstream customers are picky about plastic film products. The high-end trend of BOPA films has been very obvious. High-end synchronous nylon films with better quality balance, better dimensional stability, lower thermal shrinkage rate and superior comprehensive performance will become the mainstream of the market!

       All in all, the BOPA 4.0 era is the fourth technological revolution characterized by "fully automated and intelligent" deep penetration. The traditional BOPA film production and preparation technology will undergo revolutionary changes. The domestic BOPA film industry still needs to face up to the contradictions of excessive low-end production capacity and surge in high-end demand, realize its own transformation and upgrading through technology, model and management innovation, and become a leader and winner in the BOPA 4.0 era.