Aromatic Backbone：PEEK has an aromatic backbone with ether and ketone groups. This gives it high thermal stability. The strong carbon - carbon bonds in aromatic rings and stable linkages help it resist heat. Unlike polymers with aliphatic backbones, PEEK can keep its structure above 200°C, making it good for high - temp sealing.
Crystallinity：PEEK is semi - crystalline. Processing can change its crystallinity, which affects properties. Higher crystallinity, like from compression molding, improves mechanical strength and chemical resistance. Tightly packed crystalline parts block corrosive substances, enhancing its corrosion - resistant sealing.
Great Chemical Resistance：PEEK can resist many aggressive chemicals. It stays inert in strong acids like sulfuric acid, strong bases like sodium hydroxide, and organic solvents like benzene and acetone. This is much better than rubber seals that may swell or degrade in such chemicals.
High - Temp Sealing：PEEK keeps sealing well at high temps. It has a high glass - transition temp (about 143°C) and melting point (around 343°C). In high - temp industrial furnaces or engine exhausts, PEEK seals work reliably, unlike traditional materials that may soften or melt.
Low Permeability：PEEK has very low gas and liquid permeability. Its dense structure, from composition and crystallinity, stops molecules from passing through. This is important for sealing fuel lines in automotive and aerospace to prevent leaks.
Mechanical Strength vs. Rubber：PEEK has much higher mechanical strength than rubber seals. Rubber may deform or break under high loads, but PEEK can handle stress without losing sealing ability, suitable for high - pressure hydraulic systems.
Durability vs. Plastic：Plastic seals may degrade over time due to oxidation, moisture, or fatigue. PEEK has excellent long - term durability. It resists environmental and mechanical wear, reducing seal replacements and maintenance costs.
The main technical indicators of Sealing material are:
| MATERIAL MODEL | LY-101-1 | |
| ENTRY NAME | UNIT | INDEX |
| Tensile strength | MPa | 95 |
| Bending strength | MPa | 175 |
| Impact strength (without notches) | KV/mm | 22 |
| Compressive strength | MPa | 1.3-1.5 |
| Volume resistivity | Ω· cm | 127 |
| Proportion | g/cm3 | 1.3 |
| Continuous operating temperature | ℃ | 260 |
Application fields of PEEK sealing material:
Automobile manufacturing industry: PEEK sealing material is suitable for seals in automobile engines, transmissions, braking systems and other parts. It has high temperature resistance, wear resistance and corrosion resistance.
Semiconductor production field: PEEK sealing material can be used to make seals in semiconductor equipment to ensure the sealing of vacuum environments and high-purity gases during the production process.
Petrochemical industry: PEEK sealing material In chemical equipment, pipelines and valves, PEEK sealing material can resist chemical corrosion and high temperatures to ensure sealing performance.
Electrical equipment field: PEEK sealing material is used to seal electrical connectors, insulators and other components to provide reliable insulation and sealing effects.
OEM Customization Service：
In the context of a globalized market, the competitive pressure faced by Chinese enterprises has become increasingly severe. In order to stand out in the fierce market competition, more and more companies are beginning to focus on personalized and customized services to meet the diverse needs of consumers.
