1.What are the performance and characteristics of polyester coating?
Core Ingredients: Saturated polyester resin as the primary film-forming agent, combined with pigments, additives, and other additives.
Process Characteristics: The coating thickness is typically 10-25μm (front), with a 5-10μm epoxy backcoat (to enhance adhesion) applied to the back. The coating is applied by roller coating and then cured by high-temperature baking.
Key Performance:
Advantages: Highly cost-effective, rich color options (customizable in matte and gloss finishes), moderate acid and alkali resistance and aging resistance at room temperature, suitable for non-extreme environments.
Disadvantages: Susceptible to fading and chalking (coating surface peeling) when exposed to strong UV rays (e.g., in plateaus and tropical regions) or high humidity (e.g., coastal regions).
Applications: Ordinary factory buildings and warehouse roofs/walls, temporary structures, and interior decoration (e.g., partitions and suspended ceilings) in inland areas.
2.What are the coating and core components and process characteristics of silicone modified polyester coating?
Core Component: Silicone resin added to polyester resin (typically at a ratio of 10%-30%) to enhance weather resistance.
Process Characteristics: Coating thickness is similar to PE (15-25μm on the front), curing temperature is slightly higher, and the molecular structure is more stable.
Key Performance:
Advantages: Weather resistance is 30%-50% higher than PE, with enhanced UV and chalking resistance, long-term color retention (5-10 years), and higher hardness than PE, resulting in improved scratch resistance.
Disadvantages: Average solvent resistance, 10%-20% higher price than PE.
Applicable Applications: Regions with specific weather resistance requirements (such as subtropical and temperate coastal regions), mid- to high-end factory buildings, commercial building walls, and gas station canopies.
3.What are the core processes and characteristics of polyvinylidene fluoride coating?
Core Components: PVDF resin (a fluorine-containing resin) is used as a film-forming material, combined with specialized pigments (such as titanium dioxide and inorganic pigments). It typically consists of a two-layer structure (primer + topcoat) (total thickness 25-40μm).
Process Characteristics: Requires high-temperature baking (230-250°C) for curing. The coating exhibits strong adhesion to the substrate, and its molecular structure contains fluorine atoms, resulting in extremely high stability.
Key Performance:
Advantages: Excellent weather resistance, with long-term exposure to strong UV rays, high salt spray (coastal and marine environments), high temperature and high humidity, and resistance to fading and chalking for 15-20 years. It also offers strong resistance to acids, alkalis, and solvents (such as oils and chemical reagents), and excellent self-cleaning properties (rainwater can wash away surface stains).
Disadvantages: High price (30%-50% higher than SMP), relatively limited color options (mainly standard colors, with high customization costs for special colors). Applicable scenarios: high-end commercial buildings (such as shopping malls and office buildings), coastal buildings, chemical plants (with corrosive gases), and roofs/walls of iconic buildings (where the appearance needs to be maintained for a long time).
4.What are the core components and process characteristics of acrylic coating?
Core Component: Acrylic resin is the primary film-forming substance, typically applied as a single coat (8-15μm thick).
Process Features: Low curing temperature, high production efficiency, and low cost.
Key Performance:
Advantages: Vibrant colors, strong decorative properties, acceptable short-term weather resistance, and low price.
Disadvantages: Poor long-term weather resistance (prone to fading and cracking within 3-5 years), weak water and scratch resistance.
Applications: Indoor decoration (such as display cases, partitions, and temporary interior walls), and enclosed environments not exposed to the outside (such as partitions within warehouses). Not suitable for outdoor use.
5.According to the coating structure, what categories can it be divided into?
Single-coat: Only one coating is applied to the front surface (such as acrylic, some PE). This method is low-cost, but has weak adhesion and durability, and is mostly used indoors.
Double-coat: "Primer + Topcoat" (such as PVDF, SMP). The primer improves adhesion to the substrate, while the topcoat provides weather resistance and decorative properties. Its durability is far superior to a single-coat method.
Triple-coat: "Primer + Topcoat + Clearcoat" (used in a limited number of high-end applications). The clearcoat further enhances gloss and self-cleaning properties. This method is extremely costly and is mostly used on iconic buildings.