Influence of Chemical Surface Modification of Woven Fabrics on Ballistic and Stab Protection of Multilayer Packets

In order to achieve enhanced protective and wear (flexibility, less bulkiness) properties of ballistic and stab protecting panels the investigation of chemical surface modification of woven p-aramid fabrics was performed applying different chemical composition shear thickening fluid (STF) which improves friction inside fabric structure. For the chemical treatment silicic acid and acrylic dispersion water solutions were used and influence of their different concentrations on panels' protective properties were investigated. Results of ballistic tests of multilayer protective panel have revealed that shear thickening effect was negligible when shooting at high energy range (E > 440 J). Determination of stab resistance of p-aramid panels has shown that different chemical composition of STFs had different influence on protective properties of the panels. Application of low concentrations of silicic acid determined higher stab resistance values comparing to higher concentrations of acrylic dispersion water solutions. At this stage of research stab tests results as ballistic ones determined that STF application for multilayer p-aramid fabrics protective panels is more efficient at low strike energy levels.Original Abstract: Siekiant padidinti sarvinio paketo apsaugines savybes ir sumazinti jo svorj, darbe atlikti aramidiniu audiniu pavirsiaus modifikavimo tyrimai. Pavirsiaus cheminis apdorojimas atliktas skirtingos chemines sudeties slyti mazinanciais preparatais taip siekiant padidinti trintj tarp pluostu sistemu. Preparatai buvo uzpurskiami dviem budais: tiesiogiai ant medziagos pavirsiaus bei naudojant zemos temperaturos plazme, kuri modifikuoja medziagos pavirsiu, - taip siekiama suaktyvinti pavirsiu ir padidinti vilguma. Atlikus aramidiniu audiniu daugiasluoksnio paketo balistinius bandymus nustatyta, kad cheminis medziagos pavirsiaus modifikavimas slyti mazinanciais preparatais yra efektyvus tik tada, kai smugio energija yra maza. Dideles kinetines energijos (E > 440 J) ginklo smugio poveikiui papildomas cheminis modifikavimas jtakos neturi. Analogiski tyrimu rezultatai gauti atlikus daugiasluoksnio aramidinii) audiniu paketo smugio smaigu bandymus. Isanalizavus skirtingos chemines prigimties slytj mazinanciu preparatu itake smaigo pradurimo gyliui medziagoje nustatyta, kad mazq energiji) lygmenyje silicio pagrindo preparatai gerokai padidina trintj tarp pluosti) (jie apie 10 karti) pagerino atsparumo duriui verte), palyginti su akrilo preparatu. Taip pat n