Product packaging is the first impression of a product to consumers, and its appearance and quality are one of the important factors affecting its popularity. However, in recent years, due to the proliferation of problem food in the market, people's safety awareness has gradually increased. Whether the product packaging is environmentally friendly has become an important consideration for consumers to choose. According to incomplete statistics, plastic packaging accounts for about 44% of the total amount of packaging materials [16]. Therefore, it can be said that plastic film materials are indispensable in modern product packaging.
Coating composite technology is an important means to produce composite film materials. At present, there are many processing methods commonly used, such as dry composite, wet composite, extrusion composite and so on. Dry composite is widely used in the domestic market because of its wide range of substrates, good adhesion and various structures. However, this method has the disadvantages of large energy consumption, high cost, solvent emission and environmental pollution.
Therefore, with the improvement of people's awareness of environmental protection and safety and health, solvent-free composite technology has become the most concerned key technology in the composite process. Solventless composite process is a manufacturing technology that uses 100% adhesive (without organic solvent) to bond the two substrates together to form a unified composite material under certain temperature and pressure. With the rising cost of organic solvents caused by the oil crisis in the 1970s and the increasing requirements of global environmental protection, solventless coating laminating machine without organic solvents came into being. In particular, with the introduction of relevant policies and regulations in various countries to strictly limit the emission of organic solvents, some flexible packaging manufacturers are about to upgrade their equipment or expand their production capacity, generally choose solvent-free coating laminating machine with outstanding advantages in speed, safety and environmental protection. The first solventless laminating machine in China was an experimental machine which was equipped by Beijing Research Institute of chemical industry from Henkel company of Germany in 1985. At that time, it had not been put into production. In a real sense, the solventless compound machine that was put into production should be imported from Italy's SCHIAVI company by Tianjin dingzheng company in 1996. Since then, Dalian Shengdao, Guangzhou jinweilong, Shanghai Sanying and other manufacturers have successively imported about 20 solventless laminating machines from France, Italy, Germany and other countries. However, more than ten years have passed, the number of solventless laminating machines in China only accounts for about 2% of the total number of all kinds of laminating machines, which is far lower than the level of 80% - 90% in developed countries. Even if these enterprises have solvent-free compound machine, 40% have not adjusted it to normal use. In these enterprises, most of them haven't brought into play or dug out the efficiency that the equipment should have. The products produced by the machines are of single variety, low grade and thin profit. China's solvent-free compound machine development road seems to be a very embarrassing situation. What is the reason why the popularization of solventless laminating machine is so slow? Many experts in the industry have made brilliant analysis, which are summarized as follows:
1) The government has not yet issued effective policies and regulations to limit the solvent emissions of packaging materials. Consumers' awareness of the identification and awareness of whether there is solvent or not is not enough, which leads to the lack of pressure and motivation of packaging and printing enterprises. Moreover, it costs a lot of manpower and material resources to update the existing production equipment, so the existing production mode is difficult to change for a time.

2) Companies underestimated the difficulty of the technology. The fact shows that solvent-free composite technology is simple in principle but difficult to grasp in technology. It involves the interdisciplinary (mechanical, electronic, chemical, control engineering and other fields) cross, multi parameter (including product performance parameters, structural parameters, operating process parameters, environmental parameters and raw material parameters) joint control. These parameters interact with each other and need modern control theory and high-quality comprehensive technical personnel to find out the mechanism and grasp the law.

3) There are few domestic manufacturers of solvent-free glue, most of which are purchased from abroad, which are expensive and costly. The cost of equipment commissioning is high. Because this kind of equipment runs fast, has many control parameters, and the raw material consumption in the debugging period is larger than that of the solvent type compound machine, many enterprises dare not venture into it rashly.
4) Machine operator training is expensive and difficult to find. It is much more difficult to cultivate a qualified solventless coater than to find a dry laminating machine leader in the long run. It requires not only sufficient operating experience, but also higher theoretical basis and multi-disciplinary knowledge, and can not adopt the traditional training mode.
Therefore, the difficulty of equipment, technology and captain is the main reason why the solventless coating composite technology is difficult to popularize and popularize in China. In addition, the further strengthening of environmental protection requirements of packaging materials by national policies, the further improvement of people's awareness of environmental protection and safety, and the further embodiment of market value of solvent-free coating are important factors affecting its popularization and promotion.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations. Mr. Li 13112852595