04-08-2016 дата публикации
Номер: US20160221034A1
Various embodiments directed towards methods of applying sizing to fibers are disclosed herein. In some embodiments, solvent can be used to dissolve a sizing material into a solution, which can then be used to coat the fibers. In some embodiments, a water bath is used to coagulate a sizing on the fiber surface and to remove the remove solvent after coating the fibers, so that water vapor can be created during a subsequent drying step as opposed to solvent vapors. In some embodiments, strong acids or strong bases can be used as the solvent. 1. A method of applying a sizing onto an organic or inorganic fiber comprising the steps of:providing a quantity of fibers;contacting the quantity of fibers with a composition, wherein the composition comprises a polymer dissolved in a water-miscible solvent, thereby forming a solvent/polymer coating on the quantity of fibers;coagulating the polymer onto the quantity of fibers;removing the water-miscible solvent by washing the quantity of fibers having the solvent/polymer coating with water; andat least partially drying the resultant quantity of polymer-coated fibers to produce a quantity of sized fibers.2. The method of claim 1 , wherein the quantity of fibers is chosen from carbon fibers claim 1 , glass fibers claim 1 , ceramic fibers claim 1 , aramid fibers claim 1 , polyolefin fibers claim 1 , polyester fibers claim 1 , acrylic fibers and combinations thereof3. The method of claim 1 , wherein the quantity of fibers is a fabric.4. The method of claim 1 , wherein the water-miscible solvent is chosen from dimethyl sulfoxide (DMSO) claim 1 , N-methyl-2-pyrrolidone (NMP) claim 1 , dimethylformamide (DMF) claim 1 , hexamethylphosphoramide (HMPA) claim 1 , acetone claim 1 , methylethyl ketone claim 1 , butanone claim 1 , methyl alcohol claim 1 , ethyl alcohol claim 1 , isopropyl alcohol claim 1 , butyl alcohol claim 1 , di-chloro methane claim 1 , chloroform claim 1 , sodium thiocyanate and zinc chloride.5. The method of claim 1 , ...
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