A kind of preparation method of para-aramid pulp reinforced polyimide fiber paper
A technology of para-aramid pulp and polyimide fiber is applied in the field of preparation of para-aramid pulp reinforced polyimide fiber paper, which can solve the problem of poor bonding force, poor connectivity of paper fibers, and paper strength. It can improve the strength, reduce the paper break and improve the dielectric properties.
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Embodiment 1
[0019] Firstly, the polyimide chopped fibers are beaten for 30 minutes through a tank beater, so that the chopped fibers are fully dispersed and loosened to obtain polyimide fiber pulp; Defibrication and dispersion treatment is carried out inside, and the para-aramid pulp pulp is obtained by deflaking and dispersing until the degree of beating is 40°SR. The dry mass ratio of polyimide chopped fibers) is added to the polyimide fiber slurry to prepare polyimide fiber aramid pulp. In order to fully disperse the fibers and reduce flocculation, the polyimide Add PEO to the amine fiber aramid pulp, the addition amount is 0.005% (relative to the ratio of the absolute dry weight of the polyimide chopped fiber); then, the polyimide fiber aramid pulp enters the front flow system of the paper machine, Add styrene-butadiene latex and CPAM before the high-level box or headbox of the flow delivery system, and the addition amount is 20% (relative to the dry mass ratio of polyimide chopped fi...
Embodiment 2
[0021] Firstly, the polyimide chopped fibers are beaten for 10 minutes through a tank beater, so that the chopped fibers are fully dispersed and loosened to obtain a polyimide fiber slurry; the para-aramid pulp is placed in a tank beater Defibrication and dispersion treatment is carried out inside, and the para-aramid pulp pulp is obtained by deflaking and dispersing until the degree of beating is 60°SR. The dry mass ratio of polyimide chopped fibers) is added to the polyimide fiber slurry to prepare polyimide fiber aramid pulp. In order to fully disperse the fibers and reduce flocculation, the polyimide Add PEO to the amine fiber aramid pulp, and the addition amount is 1.0% (relative to the ratio of the absolute dry weight of the polyimide chopped fiber); then, the polyimide fiber aramid pulp enters the front flow system of the paper machine, Add styrene-butadiene latex and CPAM before the high-level box or headbox of the flow delivery system, and the addition amount is 0.05%...
Embodiment 3
[0023] Firstly, the polyimide chopped fibers are beaten for 120 minutes through a tank beater, so that the chopped fibers are fully dispersed and loosened to obtain polyimide fiber pulp; In the process of dissolving and dispersing, disentangling and dispersing until the beating degree is 20°SR to obtain para-aramid pulp pulp, the para-aramid pulp pulp is 20% (based on the absolute dry mass of para-aramid pulp, relative to The dry mass ratio of polyimide chopped fibers) is added to the polyimide fiber slurry to prepare polyimide fiber aramid pulp. In order to fully disperse the fibers and reduce flocculation, the polyimide Add PEO to the amine fiber aramid pulp, the addition amount is 0.15% (relative to the ratio of the absolute dry weight of the polyimide chopped fiber); then, the polyimide fiber aramid pulp enters the front flow system of the paper machine, Add styrene-butadiene latex and CPAM before the high-level box or headbox of the flow delivery system, and the addition ...
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