Preparing method of colourful cellulose membrane
A technology for the preparation of colored cellulose films and films, which is applied in the direction of single-component cellulose rayon, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of color fading and easy fading of dyed colored cellulose films, and achieve energy saving , saving steam consumption, uniform and bright colors
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Embodiment 1
[0026] (1) raw material selection process: select weight ratio as 70% cotton pulp and 30% wood pulp for subsequent use;
[0027] (2) described viscose preparation process:
[0028] a. After the selected cotton pulp wood pulp is alkalized, squeezed, aged and yellowed, cellulose xanthate is obtained;
[0029] b. The yellowed cellulose xanthate is dissolved by adding NaOH solution with a concentration of 13g / L. The volume of each batch of cellulose xanthate is 10m 3 , the amount of NaOH solution added is 90kg / ton of paper, the temperature is controlled at 15°C, and viscose is obtained after dissolving. The composition of the viscose is: α-cell 8.2%, NaOH 4.9%, viscosity 52sec, ammonium value 5.6ml, and the rest is water ;
[0030] c. Aging the dissolved viscose, the temperature is controlled at 35°C, and the time is controlled at 7h. The indicators of the viscose after aging are: α-cell 8.5%, NaOH 5.1%, viscosity 49sec, ammonium value 5.5ml;
[0031] d. After the mature viscos...
Embodiment 2
[0042] (1) raw material selection process: select weight ratio as 50% cotton pulp and 50% wood pulp, standby;
[0043] (2) Viscose preparation process:
[0044] a. After the selected cotton pulp wood pulp is alkalized, squeezed, aged and yellowed, cellulose xanthate is obtained;
[0045] b. The yellowed cellulose xanthate is dissolved by adding NaOH solution with a concentration of 12g / L. The volume of each batch of cellulose xanthate is 11m 3 , the amount of NaOH solution added is 95kg / ton of paper, the temperature is controlled at 16°C, and viscose is obtained after dissolution. The composition of the viscose is: α-cell 8.28%, NaOH 5.0%, viscosity 53sec, ammonium value 5.8ml, and the rest is water;
[0046]c. Mature the dissolved viscose, the temperature is controlled at 36°C, and the time is controlled at 7.5h. The indicators of the cured viscose: α-cell 8.58%, NaOH 5.2%, viscosity 51sec, ammonium value 5.6ml;
[0047] d. After the mature viscose is filtered, it enters t...
Embodiment 3
[0058] (1) raw material selection process: select weight ratio as 30% cotton pulp and 70% wood pulp for subsequent use;
[0059] (2) Viscose preparation process:
[0060] a. After the selected cotton pulp wood pulp is alkalized, squeezed, aged and yellowed, cellulose xanthate is obtained;
[0061] b. The yellowed cellulose xanthate is dissolved by adding NaOH solution with a concentration of 12g / L. The volume of each batch of cellulose xanthate is 14m 3 , the amount of NaOH solution added is 90kg / ton of paper, the temperature is controlled at 17°C, and viscose is obtained after dissolving. The composition of the viscose is: α-cell 8.35%, NaOH 5.2%, viscosity 55sec, ammonium value 5.9ml, and the rest is water ;
[0062] c. Aging the dissolved viscose, the temperature is controlled at 37°C, and the time is controlled at 8 hours. The indicators of the cured viscose: α-cell 8.64%, NaOH 5.2%, viscosity 53sec, ammonium value 5.7ml;
[0063] d. After the mature viscose is filtered...
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