The main raw materials of pre-coated film are BOPP film, EVA hot melt adhesive, BOPET film, and LDPE hot melt adhesive. The development status of the industry is as follows:
1, BOPP industry
BOPP film is made of polypropylene particles that have been co-extruded and stretched vertically and horizontally, and used as a substrate in the production of BOPP pre-coated films. The reason why BOPP film is widely used is mainly because the film itself is light in weight, non-toxic, non-polluting, non-odor, stable in physical properties, mechanical strength and air tightness, high transparency and gloss, good printing performance, and simple production process , Time-saving, labor-saving, low pollution and low price.
China is the world's largest producer of BOPP, accounting for about 40% of the world's total production. According to statistics from relevant departments, the total domestic production of BOPP film in 2008 has reached 2.3159 million tons per year. By 2013, the new capacity will be more than 2 million tons, which can fully supply the production needs of downstream industries. BOPP is a downstream product of petroleum production, which changes greatly due to the impact of crude oil prices.
2, the status quo of the EVA industry
EVA is a solid soluble polymer composed of ethylene and vinyl acetate. The higher the content of the latter, the higher the transparency, flexibility and toughness of EVA, and the lower the melting point. According to the content of vinyl acetate, EVA can be divided into foaming grade, wire and cable grade, coating grade, hot melt grade, etc. It can be used in packaging, adhesives, printing, footwear and clothing. Coating grade is the most common type in the production of pre-coating film, which is combined with the substrate through heating and pressure to form a pre-coating film. This type of EVA has large production volumes in Canada, Germany, Japan, South Korea and other countries. Domestic production capacity is not yet available. However, China Petroleum & Chemical Corporation has established a joint venture with DuPont of the United States in China to solve the long-term dependence of domestic pre-coated EVA on imports. The price of EVA is affected by the price of crude oil.
3, BOPET industry status
BOPET film is made of polyester. It is a colorless, transparent and glossy film with good mechanical properties, high temperature and low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention. It is one of the base materials for barrier pre-coated films. China is the second largest producer in the world, after the United States. The domestic supply of BOPET film is abundant, and the price is closely related to the price trend of crude oil.
4, LDPE industry status
LDPE is a thermoplastic formed by the free polymerization of ethylene under high pressure. It is mainly used in the production of film products, agricultural films, packaging films and industrial films. In addition, in the manufacture of pre-coated films, LDPE is used as a hot melt adhesive for BOPET pre-coated films. LDPE has been used very early, so the current production process is very mature.