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    Home > Coatings News > Paints and Coatings Market > Liquid vs powder coating, how to choose to be both practical, beautiful and environmentally friendly?

    Liquid vs powder coating, how to choose to be both practical, beautiful and environmentally friendly?

    • Last Update: 2020-10-30
    • Source: Internet
    • Author: User
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    It is well known that architectural coatings are divided into liquid coatings and powder coatings. Liquid coatings are used mostly in the North American market, powder coatings are often the first choice in Europe, while the Asian and Middle Eastern markets have their own focus on the use of liquid coatings and powder coatings.
    , which is better when choosing the paint for the exterior of the building?
    1.is a liquid <<<
    a liquid coating? What is powder coating? Let's take a quick look!
    liquid coating body
    liquid coating - 70% PVDF fluorocarbon resin coating, to meet the industry's high-quality performance standards for weather resistance to construction metal products, the remaining 30% of the binders are made up of proprietary acrylic formulations developed by paint manufacturers .
    70% of PVDF liquid coatings can be prepared for spraying of aluminum profiles, cleaning the metal and preparing for coating, starting with pre-treatment. Then a double coating system is applied:
    1. Primer is usually used. Primers improve corrosion resistance and determine bonding quality.
    2. Paint determines color, improves weather resistance, and provides other paint features.
    addition to the dual coating system, some liquid coating systems also have a three-coat process that contains varnish. Varnishes can improve the weather resistance of some formulations, and even after 20 years of outdoor exposure, they still look new.
    powder coating
    powder coating - for ease of application, powder coating is generally a single coating system, rarely used in the end paint or varnish. Powder coatings are dry film processes that use finely ground resin particles, pigments and additives. The solvent used in liquid coatings is omitted. Melt, extrude, cool, slice and grind the mixture into powder. Charge the powder statically and spray it on grounded aluminum profiles. The charged powder particles adhere to the metal and remain adhesive until they melt into a uniformly flowing coating in the curing furnace.
    Now, let's start with the performance of the two coatings, in hardness, corrosion resistance, aesthetics, sustainability, repair and other aspects of liquid coatings and powder coatings to compare, take you into the mysterious world of coatings!
    2.coatings <<<
    liquid coatings (
    ) have a weaker hardness than powder coatings and do not have a strong powder coating function in preventing scratches.
    powder coatings (strong)
    excellent hardness allow powder coatings to be used in high-volume areas and are highly wear resistant to prevent scratches.
    liquid coatings (
    ) liquid coatings are particularly resistant to corrosion in coastal environments because the primer system in liquid coatings helps prevent silk corrosion.
    AAMA is an authority on the specifications, performance requirements, and testing procedures for architectural coatings, including AAMA 2603-15, AAMA 2604-13, and AAMA 2605-13.
    For example, in outdoor exposure and laboratory accelerated testing in South Florida, 70% of PVDF liquid coatings have a final performance far greater than powder coatings when both liquid coatings and ultra-durable polyester powder coatings meet the requirements of AAMA 2605.
    powder coatings (weak)
    hardness, which means that flexibility tends to be lower. This makes powder coatings easier to peel off.
    , for example, at the edge of a window and curtain wall frame. Peeling exposes small areas of aluminum and can create corrosive environments, especially on the coast.
    and powder coatings are prone to silky corrosion, especially along cutting edges, as they are not usually used with primers. Any peeling or cracking on the coating can cause corrosion of the aluminum. This corrosion can spread under the coating, which can cause the coating to crack and fall off the metal.
    liquid coating (strong)
    70% PVDF coating system offers a wide range of colors, including standard colors, bright metallic colors, special effects, printing, and more.
    and liquid coatings can form very smooth coatings, which is attractive to architects.
    powder coating (weak)
    standard color range with a slight orange peel texture.
    production of custom color samples for powder coatings basically involves the entire production process: mixing pigments, grinding the preparation into powder, applying its static electricity to the metal surface, and then analyzing the resulting color. This process is cumbersome compared to liquid pigments.
    liquid coatings (weak)
    liquid coatings require less energy than powder coatings to produce VOCs, but they can be captured and reused in energy-efficient manufacturing processes.
    powder coating (strong)
    powder coating has the sustainability advantage of zero VOC at the point of application. High-volume monochrome powder coatings can also be combined with material recovery systems to increase productivity, minimize associated energy use, and reduce waste generation.
    liquid coatings (weak)
    higher than polyester powders because of the higher price of high-performance PVDF resins.
    powder coatings (strong)
    low application costs compared to liquid PVDF.
    Liquid Coatings (Strong)
    In collaboration with coating manufacturers, initial coating personnel, and a team of repair and repair teams with extensive expertise, liquid coatings can be patched with the same technology and have similar properties.
    powder coating (weak)
    powder coating cannot be used in an environment outside the factory. Coated building components cannot be repaired or repaired after installation because coating technology changes over time and no longer matches.
    3. the final <<<
    , the strengths and weaknesses of liquid coatings and powder coatings are clear by comparison? Both coatings are different, and when selecting liquid or powdered architectural coatings for exterior metal construction products, architects can select the optimal system for their projects by consulting the paint manufacturer and the coating party to ensure optum appearance and durability.
    .
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