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    Home > Chemicals Industry > New Chemical Materials > Special optical polyester film (PET)

    Special optical polyester film (PET)

    • Last Update: 2022-04-05
    • Source: Internet
    • Author: User
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    Optical film is an indispensable substrate, accounting for more than 70% of its cost.
    In the LCD industry chain, the upstream raw materials of optical film are PET base film, solvents, glue, particles, and functional additives
    .
    In terms of price transmission, PET base film accounts for more than 70% of the direct material cost of optical film products
    .
    One LCD screen can use at least 7 PET optical films with different functions.
    However, domestic companies are currently restricted by factors such as technology and equipment.
    The industry has a product structure of over-saturation of ordinary polyester films and insufficient supply of high-end polyester films.
    Contradictory
    .
    Material introduction Polyester film (PET) is a film material made of polyethylene terephthalate as raw material, made into thick sheets by extrusion, and then biaxially stretched.
    It is a commonly used barrier composite film base One of the materials
    .
    Polyester film has a wide range of uses.
    At present, the largest application field of polyester film produced by domestic manufacturers is the packaging industry, such as food and beverage packaging, medical packaging, and so on
    .
    Special functional polyester film is mainly used in high-end fields such as electronic components and electrical insulation
    .
    This article mainly introduces special functional optical polyester film
    .
    Special optical polyester film is obtained by coating various functional coatings on the surface of PET polyester film, and then through corona treatment, anti-ultraviolet treatment, anti-static treatment, hardening treatment, etc.
    to meet more downstream high-end PET deep-processing products Use requirements
    .
    Main classification Optical polyester film is obtained by coating various functional coatings on the surface of PET polyester film.
    According to the function of the coating, the coating can be divided into three categories, namely, protective coating and decorative coating.
    Layers and functional coatings
    .
    1.
    Coat the surface of the PET polyester film with an anti-scratch and anti-static coating to make a screen protective film, which can be used to protect the surface of the screen of a mobile phone or computer
    .
    2.
    Coating a coating containing optical particles or glass beads on the PET polyester film can be made into an optical diffusion film, which can be used in the LCD panel backlight module, which can effectively eliminate the phenomenon of light and dark interlacing or dots, and improve the brightness of the light.
    Provide uniform surface light source for LCD panel
    .
    3.
    Coating a resin system with particles on the surface of the PET polyester film can be made into an anti-glare film, which can be used in liquid crystal displays to prevent screen tailing
    .
    Application areas: Liquid crystal display, semiconductor lighting, semiconductor flexible circuit boards, electronic appliances.
    .
    .
    Development bottleneck PET polyester film surface crystals are highly oriented, which makes it difficult for coating molecules to penetrate into the PET film.
    Untreated PET polyester film is difficult to coat.
    Adhere to it tightly
    .
    Therefore, the bonding technology between the PET polyester film and the coating interface has become the first problem that domestic and foreign scholars need to solve when studying the application of coated PET polyester film
    .
    Global market structure Optical base film is the field with the highest technical barriers in the polyester film industry
    .
    It has high requirements in terms of raw material processing, impurity removal, ultra-thin film material and composite .
    At present, the global optical base film is basically produced by large foreign companies, especially the high-end optical base film product market, which is almost monopolized by companies in Japan, South Korea and other countries
    .
    With the rapid development of the domestic flat panel display industry, the demand for optical films in the domestic market is huge.
    However, domestic companies are restricted by factors such as technology and equipment.
    The production capacity of high-end optical base films is small.
    The industry is oversaturated with ordinary polyester films.
    The product structure of high-end polyester film is inconsistent with insufficient supply and demand
    .
    Main research unit/company application case LCD display: LCD TV, LCD monitor, notebook computer, tablet computer, smart phone, navigator, car display.
    .
    .
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