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15

2023

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03

Industry trends for various substrates of pre-coated films

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The main raw materials of the pre-coating film are BOPP film, EVA hot melt adhesive, BOPET film, LDPE hot melt adhesive, and its industry development status is as follows:
1. BOPP industry
BOPP film is made of polypropylene particles that have been co-extruded and stretched vertically and horizontally, and is used as a substrate in the production of BOPP precoat films. The reason why BOPP film is widely used is mainly because the film itself is light, non-toxic, non-polluting, odorless, stable physical properties, good mechanical strength and air tightness, high transparency and gloss, good printing performance, and the production process Simple, time-saving, low pollution, and cheap.
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 output of BOPP film in China reached 2.3159 million tons/year in 2008. By 2013, more new production capacity will be added, estimated to exceed 2 million tons, which can fully meet the production needs of downstream industries. BOPP is the downstream product of oil production, which is greatly affected by the price of crude oil.
2, the current situation of 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., packaging, adhesives, printing, footwear and clothing can be used. The coating grade is the most common one in the production of pre-coating film, and the pre-coating film is formed by heating and pressing with the substrate. Such EVA Canada, Germany, Japan, South Korea and other countries have a large production capacity. There is no domestic production capacity. However, China Petroleum & Chemical Corporation has established a joint venture with DuPont in China to solve the long-term dependence on imports of domestic pre-coated EVA. The price of EVA is affected by the price of crude oil.
3, BOPET industry status quo.
BOPET film is polyester as raw material, is a colorless, transparent, good gloss film, mechanical properties are better, high temperature and low temperature, chemical resistance, oil resistance, air tightness and better fragrance. It is one of the substrates of the barrier type pre-coating film. China is the world's second largest producer after the United States. The domestic supply of BOPET film is sufficient, and the price is closely related to the price trend of crude oil.
4. Current Situation of LDPE Industry
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, LDPE is used for hot melt adhesive of BOPET pre-coating film in pre-coating film manufacturing. LDPE has been used for a long time, so the current production process is very mature.

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