Production method of meta-position aramid paper fibrid
A kind of technology of aramid fiber and production method, which is applied in fiber raw material processing, synthetic cellulose/non-cellulose material pulp/paper, paper making, etc. Problems and environmental pollution problems, high temperature resistance, high elastic modulus effect
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[0034] 1. Under the condition of nitrogen protection, quantitatively add 235kg DMAC into the 300L glass-lined reaction pot, add accurately measured solid m-phenylenediamine 34.2kg under stirring, raise the temperature slightly, and keep warm and dissolve at 50~60℃ for 0.5h. Continue to pass nitrogen, cool the jacket with ice-salt water, and reduce the system temperature to 0-5°C in about 1-1.5 hours.
[0035] 2. Add 64.2~64.5kg of IPC (isophthaloyl chloride) dropwise into the pot under pressure with nitrogen, control the dropping flow rate at 0.8~1.2kg / min, and the temperature ≤ 65°C. After the addition was complete, the reaction was stirred for 1 h under the condition of continuing nitrogen flow and cooling.
[0036] 3. Stop the nitrogen flow, put the resin into the neutralization pot under stirring, add 240kg of DMAC to stir and clean the reaction pot, put it into the neutralization pot together, and slowly add the cleaning solution to the neutralization pot over 2 hours,...
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