| 摘要 |
Paper of high wet strength contains cellulose fibres regenerated in situ from xanthated fibres containing 5 to 30% by weight of combined carbon disulphide. It may be made by mixing the xanthated fibres with paper-making fibres, making the mixture into paper by a wet process and drying at a temperature at which the xanthated cellulose is converted to regenerated cellulose. The paper may also contain manmade fibres, e.g. of regenerated cellulose, polyamide, polyvinyl alcohol or polyester, or a binding agent, e.g. alginate, C.M.C. or polyvinyl alcohol powder. The paper may be permitted to shrink freely as it dries to obtain a rough-surfaced paper, which is absorbent and may be used in cold permanent waving. Alternatively, it may be creped. |
