| 摘要 |
Glass fibre is in the form of rigid monofilament fibres, at least 30 % of the monofilament fibres having a diameter greater than about 30 mu m and/or at least 50 % of the monofilament fibres having an aspect ratio of less than 30. The monofilament fibres generally have lengths in the range 0.1 to 6.5 mm. Such rigid monofilament glass fibres may be produced from longer lengths of glass fibre by a novel size reduction technique that involves feeding glass fibre to apparatus comprising a rotating shaft rigidly carrying external protruberances lacking sharp edges, with an associated screen, that processes the fibre into short lengths of individual monofilament fibres, creating minimal fines. The feed material glass fibre may be from any suitable source. One economically attractive and highly suitable source is downchute waste residue resulting from glass fibre production. At present this material is treated as waste which is difficult and costly to dispose of. By converting this waste residue to short lengths of monofilament fibre, what would otherwise be difficult to handle waste material is converted into an easily manageable form that has many uses, e.g. in plastics composites, polymeric concretes and cements and in coating materials. |
