Preparation method of premixed fiber gradient filter material
Inactive Publication Date: 2021-11-23
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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The invention provides a preparation method of a premixed fiber gradient filter material. The preparation method comprises the following steps of (1) preparation of premixed PPS (polyphenylene sulfide) fiber, namely dehydrating polyphenylene sulfide resin, and then heating and melting; weighing and spinning molten raw materials, enabling the raw materials to enter a channel, pre-mixing fibers with different finenesses in advance in the spinning process, winding, drafting and heat-setting the ejected fibers, and bundling, additionally winding and chopping heat-set PPS fiber filament cylinders to prepare PPS short fibers; and (2) preparing the premixed fiber gradient filter material. The preparation method has the advantages that a spinneret plate is transformed during fiber preparation, so that fibers with different fineness degrees are premixed in advance, the situation of non-uniform mixing in the filter material production process is improved, the CV value of the filter material is reduced, and meanwhile, the filter precision of the filter material is improved.
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Phenyl sulfideHeat setting +2
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