Choponyera chonyamulira chomwe chasungidwa chonyowa chingawoneke ngati chosawonongeka, koma chinyezi chingayambitse matenda a mildew, kuwonongeka kwa ulusi, ndipo-ngati gulaye ya nayiloni - kutaya mphamvu kwakanthawi mpaka 15% ikanyowa, mphamvu ikabwezeretsedwa ikaumitsa . Chofunikira kwambiri, gulaye za nayiloni zimatha kutaya mpaka 25% ya mphamvu zake zikanyowa chifukwa cha kuyamwa kwa chinyezi. Ma polyester slings, mosiyana, sakhudzidwa kwambiri ndi chinyezi koma amatha kudwala ndi mildew ndi kuvunda ngati atasungidwa monyowa. Bukhuli likuwunika zoopsa zomwe zimagwirizanitsidwa ndi gulayeni zonyowa, kuwonongeka kwapadera kwa zipangizo zosiyanasiyana zopangira, ndi kufufuza ndi kuyanika kofunikira musanabweretse gulaye chonyowa kuntchito.
Chovala chonyamulira chimatha kutaya mphamvu nthawi yayitali chisanawonekere - nthawi zambiri popanda chenjezo. Kutentha kwambiri, kuwala kwa ultraviolet (UV), ndi kukhudzana ndi mankhwala ndi zinthu zitatu zomwe zimakonda kwambiri zachilengedwe zomwe zimawononga ulusi wopangidwa. Malingana ndi Canadian Center for Occupational Health and Safety (CCOHS) , kuwala kwa dzuwa, chinyezi, ndi kutentha kwa pamwamba pa 90 ° C (194 ° F) kungathe kuwononga zonse za nayiloni ndi poliyesita. OSHA imanenanso kuti mphamvu za gulaye zimawonongeka chifukwa cha kuwala kwa dzuwa ndi kuwala kwa ultraviolet, ndipo imalimbikitsa kukaonana ndi wopanga kapena munthu woyenerera kuti apeze zofunika zina zopuma pantchito. Bukhuli likuwunika momwe chilengedwe chilichonse chimakhudzira kukhulupirika kwa gulaye, ndi zizindikiro zotani zomwe muyenera kuyang'ana, ndi momwe mungatetezere ma slings anu kuti asagwere msanga.
Choponyera chonyamulira chokhala ndi chitetezo cha 7: 1 chimakhala ndi mphamvu yothyola kasanu ndi kawiri malire ake ovomerezeka. Izi zikutanthauza kuti gulaye yomwe idavotera tani imodzi iyenera kupirira matani 7 osalephera. Chitetezo cha 7: 1 chimalamulidwa ndi miyezo yayikulu yamakampani kuphatikiza EN 1492-1, EN 1492-2, ndi AS 4497:2018 pazitsulo zopangira. Nkhaniyi ikufotokoza kusiyana pakati pa chitetezo ndi malire olemetsa, chifukwa chake 7: 1 ndiye muyeso wama gulayeti opangira, momwe amafananira ndi zida zina, komanso chifukwa chake malire achitetezowa ndi ofunikira poteteza ogwira ntchito ndi katundu pakukweza zinthu zenizeni padziko lapansi.