BOPP is the abbreviation of "Biaxially Oriented Polypropylene", which is biaxially oriented polypropylene film. Its production is to make the melt of high molecular polypropylene through the narrow head first to make a sheet or thick film, and then in a special drawing machine, at a certain temperature and set speed, at the same time or step by step Films made by stretching in two vertical directions (longitudinal and transverse), and after proper cooling or heat treatment or special processing (such as corona, coating, etc.).
Commonly used BOPP films include: ordinary biaxially oriented polypropylene film, heat-sealed biaxially oriented polypropylene film, cigarette packaging film, biaxially oriented polypropylene pearlescent film, biaxially oriented polypropylene metallized film, matte film, composite film Book film, laser embossed film, anti-counterfeit film and paper ball film.
1. Foreign BOPP film production technology was pioneered by Italian Montecatti Company in 1958. In 1962, industrialization was monopolized in Europe, America, and Japan. Since then, BOPP film has developed rapidly. There are more than 200 production companies worldwide and nearly 500 production lines.
2.In China, since the early 1960s, Beijing Chemical Industry Research Institute (later moved to the current Chenguang Chemical Research Institute), Beijing Electrical Appliance Research Institute (now the Guilin Electrical Research Institute) and Shenyang Chemical Research Institute (later moved to the current Chenguang Chemical Factory) and other units have explored their own designs and trial production of bidirectional stretching processes and equipment, and have successively built and put into operation some small-scale and simple equipment production lines. At that time, they were mainly used to produce BOPET and BOPP films for electrical insulation and dielectrics. Officially produced BOPP film. In order to meet the extensive needs of more industries, China began to introduce some or complete sets of larger, more automated production lines in developed countries in Europe, Japan, and the United States in 1980. By 1985, there were only 4 3000 ~ 6000 tons of low-speed imported packaging film production lines in Foshan, Guangzhou, Beijing, and Yanshan, with an annual production capacity of only 18,000 tons. From 1988 to 1989, it entered the "growing period", and by 1990, it had grown to 17 BOPP factory, 21 low-speed production lines, with an annual output capacity of 80,000 tons, a 4.4-fold increase in five years; from 1997 to 1998, China's BOPP entered the second peak period of capacity expansion, and BOPP technological innovation achieved breakthrough progress, with an annual output of 15,000 Tons of high-speed lines are widely used. By 1998, there were 43 BOPP factories and 60 production lines nationwide (of which 10,000 to 15,000 tons of high-speed lines accounted for 15). The annual production capacity exceeded 400,000 tons, which has increased 5 times in 8 years, becoming China's economy. One of the "bright spots" of growth. Attracted by the "market and benefits" and the technological advantages of wide, high-speed production lines, China ’s BOPP entered the third peak period of capacity expansion from 2002 to 2003. According to survey statistics, by the end of 2002, there were 56 BOPP manufacturers nationwide and 92 Production lines (of which there are 25 high-speed and wide-range production lines of 15,000 to 25,000 tons), with an annual production capacity of about 960,000 tons (of which 580,000 tons of high-speed lines, accounting for 60%). By the end of 2003, there were 82 BOPP film manufacturers in China, with 123 production lines and a production capacity of about 1.4 million tons. Since then, China has become a big BOPP output country, and new changes have taken place in the supply and demand relationship in China and even in Asia.