Overview of the development of the hottest interna

Overview of the development of international flexible packaging machinery

1 introduction

as we all know, only after giving products proper packaging, can they become commodities. Therefore, packaging is an important guarantee in the circulation process of transferring products from producers to consumers without changing the quality

in modern society, unit consumer goods tend to be miniaturized, so the volume and weight of packaging will develop towards miniaturization. Table 1 lists the development of flexible packaging of various materials from 2000 to 2003, when the market competitiveness was further improved. Among them, the decrease of cellophane is due to the replacement of PP film - this trend is still continuing

2 flexible packaging and its 2018 rubber and plastic Exhibition: PolyOne exhibition materials, colorants and additives innovation program development overview of production equipment

various products have different requirements for flexible packaging materials, such as sufficient mechanical strength, the barrier performance of various Hengxu called on the state to introduce relevant policies, media (such as water, steam and other gases), good hot pressing (or cold pressing) sealing performance, and good processing performance

various commonly used flexible packaging materials have their own characteristics, which can be selected according to different occasions. Such as the rigidity of paper; Rigidity and heat resistance of cellophane; PE and PP thermal sealing, mechanical strength and moisture resistance; Mechanical strength, heat resistance, odor barrier and film size stability of pet; The best light, moisture and odor resistance of aluminum foil. Figure 1 shows the use of various flexible packaging materials in the world in 2003

because a single material is often difficult to meet the needs of products, people combine the films of more than two materials to obtain better comprehensive properties. And extend the life of goods. The general trend is that the composite structure is becoming more and more complex. The most common composites are listed in Table 2. In addition, vacuum metal coating is also developing rapidly

contrary to composite materials, the other extreme of development is to reduce costs, only seek short-term protection, and use a large number of single-layer films. The average situation of using flexible packaging for various products in the world is roughly shown in Figure 2

nowadays, environmental problems have attracted more and more public attention. The flexible packaging industry is required to adopt new technologies, new structures, new processes and new materials to reduce the emission of dust, gas and solid waste, reduce the consumption of materials and energy, and reuse, recycle and reuse, that is, the so-called 4R (reduce, reuse, recover, recycle) principle

in order to obtain satisfactory results, the flexible packaging industry continues to make efforts from the following three aspects: A. developing new machines suitable for different products; B. Develop new flexible packaging materials; C. Train well-trained employees who are familiar with equipment and materials. This paper mainly discusses the development of flexible packaging equipment

the process route of flexible packaging production is basically: printing → compounding → slitting → bag making or wrapping. Modern machines generally adopt advanced technologies such as computer control. Satisfactory results can also be obtained when raw materials have defects such as fracture, insufficient flatness, unstable tension, irregular shrinkage and tensile deformation

when developing new machines, the direction of efforts is as follows: ① the materials that can be processed are as thin as possible, and 2.5 have been processed at present μ Printing machine of mpet film; ② The consumption of materials and inks shall be minimized; ③ Low energy consumption; ④ Use the amount of waste solvent to feed air pollution; ⑤ Try to reduce the downtime of changing the printing plate; ⑥ Able to cope with the different properties of various printing materials. The key to solve the problem is often: the transmission of reel material from the unwinding part to the winding part, tension control system and air/heat control