Method for the manufacture of antibacterial viscose filament rayon and a product obtained using that method

A method for the manufacture of antibacterial viscose filament rayon dyed in mass, based on following stages:

• Treatment of the raw cellulose with a concentrated solution of sodium hydroxide, resulting in alkali cellulose which after that is subjected to destruction to reduce the degree of polymerization;
• reduction of the temperature and dosing of the quantity of alkali cellulose for the production of one batch of viscose;
• treatment with carbon disulphide until it is transformed into cellulose xanthate which is soluble in a diluted solution of sodium hydroxide, mixing and then filtering for removal of the impurities, deaerating and filtering again after which the already cleared viscose 8.8% cellulose and 6.4% sodium hydroxide content and ripeness index 18.5-19.5 is fed under pressure to the spinning machines. Wet spinning is performed by passing the dyed in mass cellulose solution, by means of a dosing pump, through the spinneret holes into the spin bath, where as a result of the chemical reactions the cellulose from the cellulose solution transforms into dyed in mass rayon filament yarn;
• next treatment with various solutions for removal of the residues from the spin bath, the sodium sulphate and the basic sulphur, resulting from the chemical reactions during spinning;
• followed by drying, conditioning, rewinding and quality determination, with the main characteristic that antibacterial additive and pigment suspension as antibacterial dyed complex for antibacterial and dyed in mass viscose filament rayon production are added together into ready for spinning viscose, mixed and homogenized with it immediately before its spinning on the spinning machine, after which the rest of the above—described operations follows.