POLYOXYMETHYLENE COMPOSITION FOR COLORED ZIPPER, COLORED ZIPPER USING POLYOXYMETHYLENE COMPOSITION AND METHOD FOR PREPARING COLORED ZIPPER

摘要

The present invention relates to a polyoxymethylene composition for dyed zippers, a dyed zipper using the polyoxymethylene composition and a method for manufacturing the dyed zipper. The polyoxymethylene composition contains 0.3 through 1.5 parts by weight of one of TiO2, ZnS and ZnO based upon 100 parts by weight of polyoxymethylene. The dyed zipper is manufactured by preparing an undyed zipper tape from polyethylene terephthalate; dissolving and injecting the polyoxymethylene composition to an edge of the zipper tape in the form of teeth to obtain a zipper; piece-dyeing the zipper with disperse dye; and post-treating the piece-dyed zipper with caustic soda and drying the post-treated zipper. The polyoxymethylene composition containing 0.3 through 1.5 parts by weight of one of TiO2, ZnS and ZnO based upon 100 parts by weight of polyoxymethylene is injected to the undyed zipper tape and then the whole zipper is piece-dyed so that the difference in color between the zipper tape and the zipper teeth can be adjusted substantially same via a simple and cost-saving process.