Mesh-Reinforced Fluoropolymer Sintering
Fluoropolymer Coating & Lining Services
ChiNaite has more than 25 years of experience in providing fluoropolymer coating and lining services. Through ongoing development and testing, we've introduced three mesh-reinforced sintering processes designed to solve long-standing issues in industrial processes, such as corrosion and surface damage caused by harsh environments.
Introduces a mesh-reinforced fluoropolymer sintering technique that addresses common problems in glass-lined equipment—such as chipping, flaking, and poor resistance to aggressive media containing fluorine, iodine, or alkali. This solution also provides a cost-effective alternative to alloy equipment, with a proven service life of up to 20 years in industrial use.
- High Purity Liquid Fluoropolymer Coating
- Ultra Pure Powder Fluoropolymer Coating
- Common Filling Materials
- 1. Topcoat
- 2. 0.8-1mm intermediate coat
- 3. 0.3mm intermediate adsorption layer (to prevent acid liquid and acid gas from penetrating)
- 4. 0.8-1mm intermediate coat
- 5. 0.2mm primer
- 6. Steel mesh
- 7. Metal panel
Furnace Dimensions: Ø5m × H5m × L10m
Conventional sintered fluoropolymer powders and liquid coatings often contain fillers and colorants. These additives reduce the overall purity of the material and result in poor stability when exposed to highly permeable substances or strong corrosive and oxidative media. In contrast, our high-purity liquid fluoropolymers are formulated without any pigments or fillers, whether used as primer, intermediate coat, or topcoat. Manufactured in cleanroom environments through a specialized process, these coatings have a dense and uniform structure.
Thanks to their purity and process control, they offer excellent resistance to permeation, particularly against small molecules such as steam, fluorine- and chlorine-containing gases at temperatures exceeding 200°C. This high-performance barrier layer maintains its stability even under extreme chemical exposure, with a service life of up to 20 years.
| Standard mesh-reinforced sintering | Special thickness mesh-reinforced sintering | |
| Thickness range | 0.8 mm – 1.2 mm | 1.8 mm – 2.2 mm |
| Application scope | Suitable for general corrosion conditions where cost optimization is a priority. | Designed for highly corrosive environments where conventional coatings such as glass lining have a short lifespan,or where materials such as titanium,Hastelloy,G20 alloys,or aluminum alloys also fail to meet durability expectations. |
In response to the varying demands of industrial processing environments, we offer two mesh-reinforced sintering thickness options using high-purity liquid fluoropolymers: standard and for special thicknesses. These fluoropolymer coatings are designed to handle extreme vacuum conditions (as low as -0.1 MPa) and maintain reliable performance across a wide temperature range, from cryogenic levels at -190°C up to 260°C in continuous use, withstanding spikes of 280–300°C. In addition to excellent thermal and chemical resistance, mesh-reinforced fluoropolymer sintering delivers outstanding hardness and superior wear resistance, which makes it a strong alternative to conventional fluoropolymer solutions.
Process Flow
- Grinding and smoothing
- Degreasing
- Grit blasting and roughing
- Steel mesh welding
- Even stirring of primer
- Sintering of primer
- Liquid intermediate coat proportioning and stirring
- Cold sintering of liquid intermediate coat for multiple times
- Sintering for multiple times
- Topcoat coating for two times
- Topcoat sintering for two times
- 1. Topcoat
- 2. 0.8-1mm intermediate coat
- 3. 0.3mm intermediate adsorption layer (to prevent acid liquid and acid gas from penetrating)
- 4. 0.8-1mm intermediate coat
- 5. 0.2mm primer
- 6. Steel mesh
- 7. Metal panel
This fluoropolymer sintering process uses ultra-fine powder for the middle and top coating layers. The middle layer contains a small amount of metal, while the top layer offers the same level of purity as high-purity liquid fluoropolymers. All materials are produced in ISO Class 6 cleanrooms, meeting the strict standards required by the semiconductor industry.
Ultra-pure fluoropolymer coatings are made through a specialized process that ensures a dense and uniform structure. These coatings are particularly effective in blocking the permeation of small molecules like fluorine, chlorine, and steam under temperatures below 200°C. Ultra pure powder fluoropolymer coatings remain stable under prolonged exposure and offers a service life of up to 15 years.
| Standard mesh-reinforced sintering | Special thickness mesh-reinforced sintering | |
| Coating Thickness | 0.8 mm – 1.2 mm | 1.8 mm – 2.2 mm |
| Application Scope | Suitable for standard anti-corrosion conditions where cost-efficiency is a priority. | A better fit for harsh environments where materials like glass-lined steel,titanium,Hastelloy,G20 alloy,and aluminum tend to have limited service life. |
Depending on the operating conditions, high purity powder fluoropolymer coatings are available in two mesh-reinforced sintering thicknesses: standard and special thickness. Our fluoropolymer sintering coatings can withstand extreme vacuum environments (up to -0.1 MPa) and offer a theoretical temperature resistance ranging from -190°C to 260°C.
Process Flow
- Grinding and smoothing
- Degreasing
- Grit blasting and roughing
- Steel mesh welding
- Even stirring of primer
- Sintering of primer
- Liquid intermediate coat proportioning and stirring
- Electrostatic intermediate powder coating for multiple times
- Sintering for multiple times
- Topcoat application for three times
- Topcoat sintering for three times
- 1. Topcoat
- 2. 0.8-1mm intermediate coat
- 3. 0.3mm intermediate adsorption layer (to prevent acid liquid and acid gas from penetrating)
- 4. 0.8-1mm intermediate coat
- 5. 0.2mm primer
- 6. Steel mesh
- 7. Metal panel
This type of electrostatic sintering uses fluoropolymer powder coatings that include fillers and colorants, which makes them less suitable for aggressive or highly permeable media. Even so, they remain a reasonable option when operating conditions aren’t too harsh, especially for projects with tighter budgets.
In applications involving steam or fluorine- and chlorine-containing substances at temperatures below 150 °C, the coating still performs reliably. Under proper use, the expected service life can exceed five years.
| Standard mesh-reinforced sintering | Special thickness mesh-reinforced sintering | |
| Coating Thickness | 0.8 mm – 1.2 mm | 1.6 mm – 2.2 mm |
| Application Scope | Suitable for standard conditions where cost control is a priority. | Recommended for harsher environments where materials like enamel,titanium,Hastelloy,G20 alloys,and aluminum are not ideal due to limited durability. |
Process Flow
- Grinding and smoothing
- Degreasing
- Grit blasting and roughing
- Steel mesh welding
- Even stirring of primer
- Sintering of primer
- Liquid intermediate coat proportioning and stirring
- Cold sintering of liquid intermediate coat for multiple times
- Sintering for multiple times
- Topcoat coating for two times
- Topcoat sintering for two times
| High purity liquid fluoropolymer coating sintering process (thin/thick layer mesh reinforced) | Ultra-pure powder fluoropolymer coating sintering process (thin/thick layer mesh reinforced) | Common filling materials sintering process (thin/thick layer mesh reinforced) | Standard high purity liquid fluoropolymer sintering process | Standard ultra-pure powder fluoropolymer coating sintering process | Common powder filling materials sintering process | |
| Service life (Depending on application) | 15–20 years | 10–15 years | 3–5 years | 1–3 years | 1–3 years | 0.5–3 years |
| Spark test (High-voltage pinhole detection) | 1.8–2.2 mm / 30,000 V | 1.8–2.2 mm / 25,000 V | 1.8–2.2 mm / 20,000 V | 1.8–2.2 mm / 20,000 V | 0.8–1.2 mm / 16,000 V | 0.8–1.2 mm / 16,000 V |
| Vacuum resistance | ≥240 mbar | ≥240 mbar | ≥220 mbar | ≥150 mbar | ≥150 mbar | ≥150 mbar |
| New | Comparison of surface molecular distribution | Old |
| Fluoropolymer molecules form a uniform spherical structure that fuses evenly. Corrosive agents cannot penetrate. | Molecules are arranged in uneven,flaky layers. Gaps between them allow corrosive substances to seep through. |
| New | Comparison of surface molecular distribution | Old |
| Corrosion and permeation resistance test Atlas Cell analysis results Test environment:20% hydrochloric acid (HCl),220°C,668 hours | ||
| Surface molecular distribution Microscopic comparison between high-purity fluoropolymer and other commercial fluoropolymer brands |
Support for a pharmaceutical company using a 150°C methyl acetic acid absorption tower in continuous intermediate production.
Solution supplied to a petrochemical plant requiring equipment suitable for producing sulfuric acid via wet-process under high humidity and temperatures ranging from 130°C to 280°C.
Coating solution provided to an Italian manufacturer producing highly corrosive chemicals with a specialized drying unit.
Fluoropolymer sintering coating for a well-known international company to prevent HF gas corrosion in pre-cooling system components.
