Njira yoyesera ya kukana kwachikasu kwa zomatira za nsapato zotentha zosungunuka

The yellowing resistance test njira yaotentha Sungunulani zomatirachifukwa nsapato akukumana muyezo wa HG/T3689-2001. Imachitidwa mu bokosi loyesa kukana chikasu, lomwe ndi mayeso achikasu pansi pamikhalidwe yofananiza kuwala kwachilengedwe, kuwala kwa ultraviolet, kutentha ndi kufananiza kwamitundu.

 

Choyamba, pangani chitsanzo chachingwe chokhala ndi kukula kwa 62±2 mm, m'lifupi - 12±2mm, ndi makulidwe osapitirira 50±2 mm. Ikani mizere yachitsanzo m'mabwalo awiri okhazikika okhala ndi mainchesi 75mm ndi 300mm, ndipo gwiritsani ntchito pepala lotchingira kuwala kumapeto aliwonse a 20mm. Phimbani, sinthani ku malo 250±2mm kutali ndi babu, yambani mayeso mutatha kukhazikitsa nthawi, ndikufanizirani ndi tchati chamtundu wanthawi zonse mkati mwa theka la ola kutha kwa mayeso kuti muwone zotsatira zake.