A kind of preparation method and product of durable high-efficiency antibacterial nylon 6 fiber
A technology of fiber and nylon, which is applied in the field of long-lasting and efficient antibacterial nylon 6 fiber preparation, can solve the problems affecting the hand feel and mechanical properties of nylon 6 fiber, affecting the long-term application of nylon 6 fiber, and the amount of antibacterial agent should not be too much, so as to achieve the improvement The effect of forming stability, improving utilization efficiency, and excellent comprehensive performance
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Embodiment 1
[0039] This embodiment provides a kind of preparation method of durable high-efficiency antibacterial nylon 6 fiber, the steps are:
[0040] (1) Dissolve butane-1,1,4-tricarboxylic acid and butanediamine in water to prepare a 50wt% solution. After stirring at 70°C for 70 minutes, the resulting mixed solution is cooled and allowed to stand to precipitate crystals ( The cooling temperature is 35°C, and the standing time is 3 hours), filtered, washed and dried to obtain the modified salt, and the molar ratio of amine group to carboxyl group is 1.001:1;
[0041](2) After mixing caprolactam, water, and 4-amino-2,2,6,6-tetramethylpiperidine uniformly, the raw materials for the ring-opening reaction were prepared, and the ring-opening reaction was used to obtain the nylon 6 prepolymer; among them, water was added The amount is 0.5wt% relative to the mass of caprolactam; the amount of 4-amino-2,2,6,6-tetramethylpiperidine added is 0.2% relative to the mass of caprolactam, and the ring...
Embodiment 2
[0047] This embodiment provides a kind of preparation method of durable high-efficiency antibacterial nylon 6 fiber, the steps are:
[0048] (1) Dissolve butane-1,1,4,4-tetracarboxylic acid and butanediamine in alcohol to prepare a 65wt% solution. After stirring at 60°C for 100 minutes, cool the resulting mixed solution and let it stand Precipitate crystals (cooling temperature is 5°C, standing time is 3 hours), filter, wash and dry the obtained crystals to obtain modified salt, the molar ratio of amine group to carboxyl group is 1.0005:1;
[0049] (2) After mixing caprolactam, water, and bis(2,2,6,6-tetramethyl-3-piperidinylamino)-isophthalamide evenly, the raw material for the ring-opening reaction was prepared, and the ring-opening reaction obtained Nylon 6 prepolymer; Wherein, water addition is 2wt% relative to caprolactam mass; Two (2,2,6,6-tetramethyl-3-piperidinyl amino)-isophthalamide addition is Relative to 0.4% of the mass of caprolactam, the ring-opening reaction t...
Embodiment 3
[0055] This embodiment provides a kind of preparation method of durable high-efficiency antibacterial nylon 6 fiber, the steps are:
[0056] (1) Dissolve 2-hydroxysuccinic acid and butanediamine in methanol to prepare a 70wt% solution. After stirring at 55°C for 100 minutes, cool the resulting mixed solution to precipitate crystals (cooling temperature is 4°C , the standing time is 5 hours), filtered, and the obtained crystals were washed and dried to obtain the modified salt, and the molar ratio of amine group to carboxyl group was 1.002:1;
[0057] (2) After uniformly mixing caprolactam, water, and antioxidant 1010, the ring-opening reaction raw material is obtained, and the ring-opening reaction is used to obtain a nylon 6 prepolymer; wherein, the amount of water added is 1wt% relative to the mass of caprolactam; the antioxidant The amount of 1010 added is 0.3% relative to the mass of caprolactam, the ring-opening reaction temperature is 245°C, the pressure is 0.38MPa, and ...
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