Disclosed are polyolefin or polyester fibers, films and molded parts that have excellent durable antimicrobial activity. The polyolefins and polyesters have incorporated therein one or more silver antimicrobial additives and one or more wettability additives. The silver antimicrobials are for example silver supported on a zeolite, silver supported on a glass, elemental silver, micro or nano scaled elemental silver, elemental silver dispersed in silocone oil, silver chloride, silver nitrate, silver sulfate, silver phosphate, silver zirconate or silver apatite. The wettability additives are for instance ethoxylated alcohols CH3CH2(CH2CH2)aCH2CH2(OCH2CH2)bOH where a is 6 to 25 and b is 1 to 100 or are alkyl metal sulfonates of formula RSO3M, where M is Na, K or Li and R is straight or branched chain alkyl of 6 to 32 carbon atoms or is straight or branched chain alkenyl of 6 to 32 carbon atoms. The present compositions retain antimicrobial activity after repeated insults.所揭示者為具有優良耐久抗微生物活性之聚烯烴或聚酯纖維,膜和模製元件。聚烯烴和聚酯具有併入其內之一或多種銀抗微生物添加劑以及一或多種可濕性添加劑。銀抗微生物劑例如為承載於沸石上之銀,承載於玻璃上之銀,元素銀,微米或奈米規格之元素銀,分散於聚矽氧油中之元素銀,氯化銀,硝酸銀,硫酸銀,磷酸銀,鋯酸銀或磷灰石銀。可濕性添加劑例如為乙氧基化醇類CH3CH2(CH2CH2)aCH2CH2(OCH2CH2)bOH,其中a為6至25且b為1至100或為式RSO3M之烷基金屬磺酸鹽,其中M為鈉,鉀或鋰,且R為6至32個碳子之直鏈或支鏈烷基或為6至32個碳子之直鏈或支鏈烯基。本發明組成物在重覆使用之後保有抗微生物活性。
