Overview of the development of flexible packaging technology
China's flexible packaging industry has a history of nearly 30 years of development. In the past 10 years, it has developed rapidly. The average annual growth rate has been maintained at about 15%. In some aspects, China's flexible packaging production and equipment manufacturing have reached the international advanced level. There has also been a qualitative leap in processing technology and quality control.
Technology development level and market conditions
1. The scale of flexible packaging color printing enterprises
In recent years, the scale of China's flexible packaging color printing industry has been increasing. There are more than 10,000 flexible packaging color printing enterprises in the country, of which about 25 companies have annual sales of more than 300 million yuan, and companies with sales of more than 100 million yuan. There are 68, and more than 20,000 small flexible packaging color printing enterprises (including family workshops). In general, due to the rapid growth of production capacity, there has been a serious oversupply in the flexible packaging market.
2. The nature and distribution of flexible packaging color printing enterprises
From the perspective of the nature of enterprises, flexible packaging color printing enterprises are mostly private (approximately 72.5%), sole proprietorship (approximately 11.8%), joint venture (approximately 15.2%) enterprises, and enterprises containing state-owned enterprises account for approximately 0.5%. China's flexible packaging color printing companies are mainly concentrated in the Pearl River Delta, Yangtze River Delta, Bohai Rim, and Northeast provinces, accounting for about 91.5%, and a small number are distributed in the central and western regions, accounting for about 8.5%.
3. Production capacity and equipment status of flexible packaging color printing enterprises
The number of production lines owned by domestic flexible packaging color printing companies ranges from] to more than 10, and some large flexible packaging color printing companies have as many as 16 production lines, which is also one of the few flexible packaging color printing companies worldwide. Generally, the annual output value of a flexible packaging color printing enterprise with one production line is 30 million to 40 million yuan. The printing equipment owned by flexible packaging color printing enterprises is mainly gravure printing machines, accounting for about 96.4%, and flexo printing machines accounting for about 3.6%; the color set of printing equipment is mainly 5-12 colors, of which 6-8 color printing machines account for about 88.6%, 9 to 12 color presses account for about 10.2%, and 5 color and below presses account for about 1.2%; printing speeds range from 80 to 300 meters / minute.
With the rapid advancement of the technical level of China's flexible packaging color printing industry, product quality has been greatly improved. In terms of printing quality, the printing level of China's flexible packaging color printing industry is quite high, which can be said to have reached the world's leading level; In the development, production and application of high-end modern packaging materials (especially special and special functional packaging materials), the gap between China's flexible packaging color printing industry and developed countries is still quite obvious.
4. The status of commonly used base materials for flexible packaging color printing
Commonly used printing substrates in the domestic flexible packaging color printing industry are LDPE, BOPP, VMBOPP, BOPET, VMBOPET, BOPA, BOPS, CPP, CPE, AI, PT, PVC, non-woven fabric, woven fabric, synthetic paper, co-extruded film, etc. Among them, the amount of BOPP accounts for about 36.5%, the amount of BOPET is about 14.5%, the amount of paper is about 15.8%, the amount of AI is 7.4%, the amount of LDPE is about 10.3%, and the amount of other substrates is about 15.5%.
5. Flexible packaging composite technology and material application status
At present, among the composite processes used by domestic flexible packaging color printing companies, dry lamination still dominates, accounting for approximately 45.7%, extrusion lamination approximately 23.4%, coextrusion lamination approximately 13.8%, solvent-free lamination approximately 7.2%, wet lamination About 5.6%, coating and other process composites account for about 3.3%; the number of layers of composite materials increases from the initial 2 layers to a maximum of 9 layers; the variety of composite barrier layer materials and inner layer heat sealing materials is also increasing The material of the barrier layer is mainly AI, VMPET, EVOH coextruded film, PVDC coextruded film, silicon oxide, alumina, K coating materials, etc. The heat seal layer materials are LDPE, LLDPE, MLLDPE, CPP, VMCPP, EVA, EAA , EMAA and co-extruded film.
6. Post-press processing status of flexible packaging
In the post-processing technology (slitting, bag making) of the flexible packaging color printing industry, the proportion of direct slitting into finished film rolls is increasing, while the proportion of bag-making products is declining. This is mainly to meet the requirements of automatic packaging machines. At the same time, The cutting speed has also been increased from the original 100-150 m / min to 180-300 m / min. The bag types of bags are becoming more diversified and shaped. In addition to the common back seal bags and triple seal bags, self-supporting bags and zippers Bags, side seal bags, spout bags, etc. are increasing.
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