In the non-woven fabric industry, filter materials are one of its important uses. Due to the simple processing and high filtration efficiency of non-woven filter materials, they have had a huge impact on traditional industries such as textile filter materials and paper filter materials. With the continuous growth of demand for kouzhao, non-woven filter materials, as important raw materials, have become an important link in performance and quality testing before being launched for sale. Below, Shanghai Qianshi has compiled the testing knowledge of non-woven filter materials according to relevant standards.

Non woven filter materials have two forms of filtration: dry and wet. Dry filtration is the separation of solid particles floating or suspended in gas or dust in the air, also known as gas-solid separation. In industrial production, it is called bag filtration. The bag filter is generally made of needle punched non-woven fabric filter material. Wet filtration is the process of separating solid particles that float or suspend in a liquid, known as liquid-solid separation. The filter cloth is used in various types of filter machines. Wet filtration is generally used for water jet non-woven fabric filtration materials.

Needle punched non-woven fabric filter material testing

Needle punched non-woven filter materials can generally be tested according to FZ/T64055-2015 "Needle punched non-woven filter materials for bag dust removal". The testing items specified in FZ/T64055-2015 for needle punched non-woven filter materials mainly include unit area mass deviation rate, unit area mass CV value, width deviation rate, thickness deviation rate, thickness CV value, air permeability deviation rate, air permeability CV value, fracture strength, fracture elongation, constant load elongation, residual resistance, dynamic dust removal efficiency, hydrophobicity, oleophobicity, surface resistance, corrosion resistance, temperature resistance, flame retardancy, and appearance quality.

Testing of water jet non-woven fabric filter material

The recommended reference for testing water jet non-woven filter materials is FZ/T64064-2017 "Polyphenylene sulfide spunbond water jet non-woven filter materials". The testing items specified in FZ/T64064-2017 for spunlace nonwoven fabrics mainly include unit area mass deviation rate, width deviation rate, thickness deviation rate, air permeability, air permeability deviation rate, fracture strength, fracture elongation, wear resistance times, dust removal efficiency, hydrophobicity, oleophobicity, surface resistance, corrosion resistance, temperature resistance, flame retardancy, and appearance quality.