?? “??????????????”??????????
????:1???????????:?????200??
2?????????
3???????
4??????????
5???????
??????????????????,??????“???????????????????”?????????,?,????????????????????“?????”??????????????????,????????????,???????????????????????????????,???????????????????????????????,?????????,12?????????26?????,??????????
??,??????????,??????????????“???????????????”???,??????,?????????GB 4806.7-2023«????????????»?????????????“??”????????????,?,???????,????????????????????,????????????????????,??????
????????,?????????????????PE????LDPE???????PVDC????????????????????????????PVC??????,?,?????????????????,???
???????????,??????????????????????????????:PE?????????????>PVDC????????>PE??????????????????????>PVC???????????????????????:PVDC????????????>PE??????????????????>PVC??>PE???????>PE????????????????????????????????????????????????????????,???????????,?????????,??????????????????????????;????????????????????????????????(??),???????,????????????
????????????,??????,????????,?????,???????????,?????,??????????????????,???,?????????,????????PVC?????,??????,??????????????????????????????,?????????(????????????????????????????????) ??????????????:??????