Knowledge Broadcast: Principles of Nonwoven Fabric Manufacturing for Vehicles

Business News, September 23, 　　 1. Non-woven fabrics are fabrics that are not woven, but are entangled with many punctured needles, or partially glued together. 2. People have invented the manufacturing principle of non-woven fabrics at the beginning of the 20th century. The first factory-scale production was American Felt Co. (American Felt Co.) in 1939, and KARLFREUDENBERG in Europe and Germany around 1944. Also started the production of non-woven fabrics.　　 Japan's non-woven fabric production started with DAINIKKU Co., Ltd. in 1958, and seven more companies joined in the following two years. Now the uses, materials and manufacturing methods of non-woven fabrics have increased, and they have become an integral part of our lives. The secret lies in the flexibility, thickness, various properties and shapes that can be freely created according to different raw materials and processing methods. 3. Non-woven fabrics have many advantages: 1) breathability, 2) filtration, 3) heat retention, 4) water absorption, 5) water resistance, 6) stretchability, 7) not messy, 8) feel good, soft, 9) light and 10) elastic , Recoverable 11) There is no directionality of the fabric 12) Compared with woven fabrics, it has high productivity and high production speed. 13) Low price, mass production, etc.　　The disadvantages are: 1) Compared with woven fabrics, the strength and durability are poor. 2) Cannot be cleaned like other fabrics. 3) The fibers are arranged in a certain direction, so it is easy to split from the right angle direction. Therefore, recent improvements in production methods are mainly focused on improvements to prevent splitting. 4. The manufacturing method is roughly divided into a wet method with water (7% in Japan, 1 to 2% worldwide) and a dry method without water (93% in Japan, 98 to 99% worldwide) . There are other methods such as hot air or hot press fixing method (thermal bonding method, wire bonding method, etc.) and adhesive method (chemical bonding method).