Manufacturing a 100% stainless steel web with roller drafting - Air laid web formation

This gaper introduces a web formation (roller drafting-air laid web formati on) and the factors that affect the web basis weight bias. This web formati on is designed to form the web using metal fibers drawn sliver as the raw m aterial, In this study, the 100% stainless steel fibers drawn sliver was us ed as the raw material. The web formation equipment consisted of a roller d rafting device, web collection device, web transportation device, and air s uction device. The web formation proceeds as follows: the slivers are drawn out to form individual fibers using conventional 3/3 drafting rollers; the fibers possess a good fiber length and fiber orientation after drafting; t he fibers are extracted from the front roller, then condensed into a thin a nd uniform web by the suction air. The related calculation for web basis we ight, test for CV% of basis weight evenness, and factors (e.g,. conveyer-be lts speed and draft ratio) affecting the distribution of web basis weight a re illustrated, In this paper, we discuss only the web basis weight within 38.0 g/m(2)- 152.0 g/m(2). We can obtain the following conclusions accordin g to the experimental results: the web basis weight bias in the machine dir ection is 6.07%, which is better than that of 17.40% in the cross direction for the web basis weight of 38.0 g/m(2) - 152.0 g/m(2); the CV% of web bas is weight in the machine direction increases with decreasing conveyer-belt speed; a ship distribution will occur in the web in the machine direction a s the draft ratio decreases; the movement of the suction tube improves the CV% of web basis weight when the tube is moved toward the position under th e front roller.