Three-dimensional random-orientation fibre web - produced by re-orientation of fibres by electric field during deposition (SE 13.4.81)

摘要

In the formation of fibrous webs, pads, etc., partic. of mineral or inorganic fibres, the fibres are deposited from an air stream onto a conveyor in a chamber within which is an electric field of at least 50 kV/m, which so orients the fibres that at least one-third of them make an angle of between 20 and 60 deg. with the plane of the web, and retain the orientation within the web. The web is treated with a binding agent after leaving the chamber. Within the plane of the web, the fibres form an angle of 0-180 deg. with the edges thereof. The process gives voluminous webs of relatively low fibre content which have high resistance to compression and deformation. The web is formed in a single, non-complicated process without the need for complex machinery and gives economies in raw material, power, and labour requirements.