Preparation method of modified polyacrylonitrile fiber paper-based rubber composite sealing material

• Main Authors: GUO AILIAN, HUANG SHANCONG, PAN JIAOJING, CAO YUCHENG, XIA XINXING
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2019
• Subjects: IMPREGNATING OR COATING OF PAPER; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

The invention relates to a preparation method of a high-performance modified polyacrylonitrile fiber paper-based rubber composite sealing material. The preparation method comprises the following steps: firstly uniformly stirring polyacrylonitrile pulp-like fiber with an NaOH solution and absolute ethyl alcohol, cooling after a thermostatic waterbath, neutralizing with acetic acid until the PH is 6to 7, washing with ionized water, and drying to obtain modified polyacrylonitrile fiber; then carrying out defibering on aramid fiber pulp, FKF compound mineral fiber, Lapinus mineral fiber, needlebush fiber and modified polyacrylonitrile fiber in water, then adding talcum powder, expanded graphite, calcium carbonate, aluminum sulfate, styrene-butadiene latex, butyronitrile latex, a sulfur ingredient, CPAM, bentonite and the like in sequence, sufficiently stirring for uniform dispersion, papermaking, and carrying out squeezing, drying and vulcanization to obtain the paper-based rubber composite sealing material. Acco