A kind of preparation method and product of regenerated acrylic fiber
An acrylic fiber, secondary dissolution technology, used in textiles and papermaking, plastic recycling, one-component synthetic polymer rayon, etc., to achieve the effect of improving difficult to color, enhancing hygroscopicity, and increasing hygroscopicity
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Embodiment 1
[0091] Regenerated acrylic fiber made from 100% natural acrylic fiber
[0092] The preparation method is:
[0093] (1) Remove the reclaimed raw materials from foreign matters such as yarn bobbins, and then wash them with water. Adding 0.05% sodium hydroxide alkali accelerator in the washing solution in the washing process, and finally drying the washed raw materials to obtain regeneration and dissolution Raw materials; in order to facilitate the subsequent better dissolution, it is necessary to crush the regenerated dissolved raw materials before dissolving;
[0094] (2) Put the regenerated and dissolved raw materials in (1) into the dimethylacetamide solution for dissolution, the heating temperature during the dissolution process is 100° C., and the heating time is 30 minutes; during the dissolution process, 0.3% of the dissolved fabric mass percentage is added Sodium hydroxide penetrating agent, 0.3% citric acid antioxidant and 0.04% carbazole purple color correction agent ...
experiment example 1
[0119] This experimental example is used to compare the performance parameters of the regenerated acrylic fibers prepared in Example 1 and Comparative Examples 1-6, as shown in Table 2.
[0120] Table II:
[0121]
[0122] From the above experimental results, it can be seen that in Example 1, due to the secondary dissolution process used in the recovery of acrylic fiber, the oligomers in the filter residue were fully extracted and passed through a specific dissolution process, which greatly improved the mechanical properties of the regenerated acrylic fiber .
[0123] Comparative example 1 did not adopt the secondary dissolution process, so its mechanical properties were not as good as that of Example 1; although comparative example 2 also carried out secondary dissolution to the filter residue dissolved for the first time, no strong stirring and heating conditions were applied during the dissolution process, and the final product Although the mechanical properties of the f...
experiment example 2
[0129] By contrasting the cross-sectional electron micrograph of the regenerated acrylic fibers made by the present invention (as figure 1 Shown) and the cross-sectional electron microscope picture of non-regenerated acrylic fiber (such as figure 2 As shown), it can be clearly seen that the cross-section of recycled acrylic fiber presents almost the same typical waist shape as that of non-regenerated acrylic fiber, but the surface of recycled acrylic fiber has slightly burrs than virgin acrylic fiber, and these small amount of burrs help moisture absorption Perspiration and improve dyeing performance. In summary, recycled acrylic fiber can not only replace virgin acrylic fiber, but also slightly better than virgin acrylic fiber in terms of moisture absorption and perspiration;
[0130] By contrasting the surface electron microscope figure (as image 3 shown) and the surface electron micrographs of non-regenerated acrylic fiber (such as Figure 4 shown), it can be seen that ...
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