| 摘要 |
<p>In the production of airlaid paper webs it is possible to add super absorbing powder materials, typically by addition either beforehand, to the fibre material to be distributed, or subsequently, viz. to the top side of an already formed web, between successively formed layers thereof. Both methods involve drawbacks, and with the invention is has been recognized that it is advantageous to introduce the powder material at an intermediate stage between the initial supply of the fibres to the airlaying unit and the final formation of the web; thus, a first coarse distribution of the powder is effected in a compulsory manner, independently of the initial supply of the fibre material, while the final distribution of the powder is effected by means of the same air flows which cause the final distribution of the fibre material for forming the even web layer. In this manner the powder is effectively mixed evenly into the fibre material.</p> |
