PVA
??????? PVA ?????????? ???????
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??????? ?????????? (PVA) ??? ?????? ???? ???? ????? ??? ??? ????? ??????, ?????? ?? ????.
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?? ?????? ????? ??????? ???? ??????? ?????? ??????? ?????, ?????? ???? ???? PVA ?? ?????. ???? ?? ??? ????? ?? ?????? ???????? ??? ?????? ?????? ????, ??? ?? ????? ?? ?????? ??????? ??? ???-????? ??????? ??????????, ?????? ???? ??? ???? ?????? ?????.
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??????, ??????? ???????, ?? ????? PVA ?? ?????? ??????? ????? ?????????? ????? ??????? ????? ??????? ?? ????; ?????? ????? ?? ?????? ?? ?????? ??????? ?-PVA ????? ????? ????.
??????, ??????? ?????????? ???? ????? ???? ??????? ???? ?? ???????? ?????????, ????? ????? ???? ?????? ?????? ??????.
??????????? ??????
| ????? | HS1788SA1 | HS2488SA1 |
|---|---|---|
| ???????? | ???? ???? | |
| ???? ???????/% | 87-89 | ? |
| ????? ???? ?????/% | ≤5.0 | ? |
| ?????? ????? /% | ≤0.5 | ? |
| PH (20%) | 5 - 7 | ? |
| ?????? (4%)/MPa·S | 20.5 - 24.5 | 45.5 - 55.5 |
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