????? ????? ??? ????? ??????

???? ?? ????? ????? ????? ????? ????? ?????????? ?????? ?? ??? ?? ???? ?????????? ????????? ????? ??. ????? ????? ???????????? ????? ????? ??? ????-???????????? ???????????? ???????, ? ?????? ?????????????? ??? ???????? ???? ??????????? ??. GEL (SiO2) ??????????????? ???? ????? ?????? ??? ??????? ???? ???????? ????? ??, ??? 40 ?? 60 ℃ ?????? ???? ????????????? ????? ??? ???? ??. ????? ???????? ??????? ??? ??? ????????? ???????????? ??????? ???????? ??????? ????? ??, ?????? ???? ??? ???????? ?????????? ??? ??? ??. ??????? ????, ? ??????? ??? ???????????? ??????????? 95% ???? ??? ??? ??, ?? ??????? ??????? ??? ???????? ????????? ??? ??. ??? ????? ???? ??????, ? ?????? 25 ℃ ?? ????? ???????? ?????????????? 20 ???? ?????? ?????? ???? ????? ??, ?? ????? ??????? ??????????? ??? ???????? ??????????? ??? ??. ????? ????????? GEL ??????????, ??? ??? SiO2 ??????? ????? ??????????, PF/PVC-SiO2 ?????? ??? ABS ??????? ????? ??? ???? ?????????? ??????? ????????? ?????? ??? ??, ?? ??????? ???? ????? ????? ??????? ??? ??????? ??????????? ???? ??? ??. ?? ????????? ????? ???????? ??? ???????? ???????? ??, ???? ?? ????? ??? ????? ?????? ????????????? ????????? ????? ??? ??, ?? ???????? ?????????? ???? ??????????? ??? ???????? ?????? ??? ??.