by ELKO Filtering
| Thursday, November 21, 2019 |
Different types of mesh fabric come in handy in various applications. Thus, it is wise to know what properties a material possesses relative to where it is going to be used before ordering your custom-cut mesh or precision mesh.
While nylon mesh is arguably the most popular option for regular applications, thanks to its relative cost-effectiveness and flexibility, it may not survive acidic environments. Polypropylene mesh, Teflon mesh, and polyester mesh are more suitable in such applications.
Polypropylene mesh is a relatively sturdy product that guarantees high resistance to inorganic substances, including simple hydrocarbons and strong acids and alkalis. The compound may, however, yield to chlorinated solvents, aromatic solvents, and oxidizing agents such as hydrogen peroxide. High temperatures may further lower the resistance of polypropylene mesh to the said substances and potentially make it vulnerable to concentrated acids. Whatever you do, avoid using polypropylene mesh with benzene, camphor, carbon tetrachloride, chlorine, chloroform, or chlorobenzene. Always consult an expert for a better understanding of the intended application before purchasing polypropylene mesh.
Polyester mesh has also been shown to be pretty selective when it comes to chemical resistance. It can withstand most acids in their dilute states as well as most solvents and oxidizers and can be used with oils, brake fluid, hydrocarbon fuels, and lubricants. Most medifab mesh products are made of this fabric, too.
Compounds that are known to attack polyester mesh include sodium carbonate or soda ash, trisodium phosphate, ammonia, calcium hydroxide or lime, caustic soda or sodium hydroxide, and other alkalis in their concentrated states.
Polyester mesh owes its popularity to its high resistance to temperature fluctuations, water, and most types of solvents.
Polytetrafluoroethylene (PTFE) is a hydrophobic fluoropolymer mostly used in making non-stick cookware. It is also used in the manufacture of pipework, containers, and Teflon mesh thanks to its non-reactive nature. Teflon mesh possesses excellent dielectric qualities and has a higher melting point compared to polyester and nylon mesh. Due to its low friction, the fabric can be used in applications where a lot of sliding action is required, such as gears and plain bearings.
Overall, Teflon mesh is the best option in mechanically harsh environments, although its relatively high "stiffness" may act as a limiting factor. Some of the common acids that PTFE is resistant to include:
- Dilute acetic acid
- Ascorbic acid
- Benzoic acid
- Carbonic acid
- Citric acid
- Formic acid
- Dilute hydrochloric acid
- Concentrated hydrochloric acid
- Lactic acid
- Maleic acid
- Nitric acid
- Sulfuric acid
Other less acid-resistant substances such as nylon may be used with select acid-based solutions as advised by a professional. Contact us today
for more information on mesh fabric and the most suitable option for your application.