专利名称：CROSSLINKED CELLULOSE PRODUCTS AND
METHOD FOR THEIR PREPARATION
发明人：GRAEF, Peter, A.,HUNTER, Frank, R.申请号：EP93916799.0申请日：19930625公开号：EP0656969A1公开日：19950614
摘要：The invention is a method of making a wet formed, sheeted, readily reslurriablesheeted crosslinked cellulose and the products made by the method. Crosslinked woodpulp fibers tend to be quite brittle. If crosslinked while in sheeted form, the sheetscannot be readily defibred, either in a wet or dry state, without serious fiber degradation.The sheet products of the present invention can be easily redispersed or repulped inwater without significant fiber breakage. The present products are made by includingwithin the sheet, while still in wet form, a debonding or softening agent which is
preferably added before the latent crosslinking reactant. Most preferably the debonderis added prior to the headbox of a paper machine and the crosslinking reactant is appliednear theend of the forming wire or at the press section. The treated sheet is driedconventionally. Crosslinking may occur entirely during drying or during a period ofadditional heating, usually at a temperature in excess of 100 °C for a short period of time.Conventional debonding agents and crosslinking reactants are suitable. The softeningagent apparently reduces or prevents adhesive bonding between adjacent fibers causedby polymer formation external to the fibers under reaction conditions.
申请人：WEYERHAEUSER COMPANY
地址：Tacoma, WA 98477 US
国籍：US
代理机构：Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät
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