The PET plastic molecular structure is highly symmetrical and has a certain crystal orientation ability, so it has high film formation and formation. PET plastics have good optical properties and weather resistance, and amorphous PET plastics have good optical transparency. In addition, PET plastics have excellent wear resistance, dimensional stability and electrical insulation. PET bottles have been widely used because of their high strength, good transparency, non-toxicity, penetration resistance, light weight and high production efficiency. PBT and PET molecular chain structure is similar, most of the properties are the same, but the molecular backbone is changed from two methylene groups to four, so the molecules are more supple and the processing performance is better.
PET is a milky white or light yellow highly crystalline polymer with a smooth and shiny surface. It is resistant to creep, fatigue and friction. It has low abrasion and high hardness. It has the highest toughness in thermoplastics. It has good electrical insulation properties and is less affected by temperature, but it has poor corona resistance. Non-toxic, weather-resistant, chemical-resistant, and hygroscopic, and drying before molding is a must. It is resistant to weak acids and organic solvents, but it is not soaked in heat-resistant water and is not resistant to alkali.
The supply and demand pattern of the polyester film industry is expected to further improve. In recent years, the new capacity of BOPET polyester film industry has been declining. The production capacity growth rate in 2015 and 2016 is below 10%. At present, the operating rate of major domestic manufacturers is around 75%, and there is no clear intention to expand production. The organization believes that as the new capacity of BOPET film requires a construction period of about 3 years, it is expected that the industry will have no new capacity investment in the next few years, and the industry supply and demand pattern is expected to further improve. The polyester film industry is booming, and bonded technology may be hot again.
BOPET polyester film industry prospects are expected
The prospect of BOPET polyester film industry is promising. At present, the largest downstream application area of ​​polyester film produced by domestic manufacturers is the packaging industry, and packaging film consumption accounts for about 60% of the total output of polyester film. The data shows that in 2015, the main business income of China's packaging industry exceeded 1.8 trillion yuan, including 171.757 billion yuan in plastic packaging containers and containers, and 103.18 billion yuan in plastic packaging film. The agency believes that as the most important downstream demand industry for polyester film, the continued booming packaging industry will provide rigid demand for polyester film. In addition, in December last year, "China Packaging Industry Development Plan (2016-2020)" proposed that by 2020, the localization rate of green and high-performance packaging materials will reach more than 35%, and some packaging materials will reach the international advanced level. The production and use of green packaging materials accounts for more than 50% of the total packaging materials used. With the rapid development of downstream packaging industry demand and the over-supporting policy, China's BOPET polyester film industry will usher in the opportunity of rapid expansion.
China's BOPET polyester film demand accounts for 33% of the total global demand. The packaging film of the domestic BOPET polyester film is the thin film, the production process is relatively simple, the equipment requirements are lower, and it is also the production capacity of BOPET polyester film in China. Concentrated areas. Thick film is a special functional film, and the production process is relatively complicated. With the diversification of product functions and requirements of downstream customers, functional polyester film products for specific applications such as electronic products, electric motors, packaging and decoration, energy conservation and environmental protection, due to the lack of supply due to the backwardness of domestic technology and production processes, Imports are still required. Under the promotion of the quality of domestic BOPET film and the continuous acceleration of import substitution in the high-end film field, the export volume of BOPET polyester film in China is expected to continue to grow.
With the industry's supply end contraction and rising raw material prices, BOPET polyester film industry will show a recovery trend. Both PTA and ethylene glycol are the main raw materials for polyester film, accounting for more than 70% of the total cost. The monthly report released by the International Energy Agency shows that the Organization of Petroleum Exporting Countries (OPEC) has reduced production by 90% in the first month of the production agreement, which is a strong one in OPEC's previous production reduction actions. The organization believes that the BOPET polyester film industry will rebound due to factors such as the inventory of low-priced raw materials in the early stage and the expansion of demand from downstream packaging companies.
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