Kev txhim kho keeb kwm ntawm blister ntim tshuab blister PVC hauv xyoo 1926

Xyoo 1926, Waldo Semon ntawm American BF Goodrich Company tau tsim cov PVC thiab thov rau patent hauv Tebchaws Meskas. Waldo Semon thiab BF Goodrich Company tau tsim ib txoj hauv kev ntawm plasticizing PVC los ntawm kev ntxiv ntau yam khoom siv hauv xyoo 1926, ua rau nws yooj yim dua thiab yooj yim rau kev ua cov khoom thiab sai sai pom kev lag luam dav siv.