Microbistatic and deodorizing cellulose fibers
OwnerAmotz Weinberginventor
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Abstract
Cellulose fibers and products comprising such fibers treated to absorb body secretions and to substantially decrease microbial growth, said fibers being chemically treated with a water soluble salt of a transition metal and an alkali and after this with a solution of a bisbiguanide compound, forming a bond between the fibers, the transition metal and the bisbiguanide. Preferred are water-soluble cupric salts as a suitable hydroxide. A preferred bisbiguanide is chlorhexidine. The products can be yarns, knitted, woven, non-woven fabrics, paper gauze and especially bandages, wound dressings, pads, diapers, sanitary napkins, tampons, bed sheets, pants, garments, towels, socks, shoe linings and underwear. Preferably between 0.1 to 3.0 weight per cent copper calculated on the cellulose is bonded to the cellulose.
Claims8
Cellulose fibers and products comprising cellulose fibers treated to absorb body secretions while substantially decreasing microbial growth, said cellulose fibers being chemically modified in a two-stage process comprising a first stage treatment with a water soluble salt of a transition metal and an alkali and a second stage treatment with a solution of a bisbiguanide compound, thereby forming a bond between the cellulose fibers, the transition metal and the bisbiguanide compound.
A product produced entirely or partially from chemically modified cellulose obtained by a process for treating cellulose fibers and a product made, at least, partially from said cellulose fibers, resulting in a substantial decrease of microbial growth when exposed to body secretions, said process comprising the steps in the order of:
- treating cellulose fibers with an aqueous solution of a transition metal salt and with an alkaline solution, thereby yielding treated cellulose fibers;
- rinsing said treated cellulose fibers to a neutral pH;
- and,
- treating said treated cellulose fibers with a bisbiguanide compound for forming a cellulose-transition metal-bisbiguanide bond.
Dependencies are inferred from the claim text.