The weight mass ratio of fragrant masterbatch should be controlled about 5%.
生产中一般控制芳香母粒质量分数5%左右。
The production technologies of PVA with ultrahigh relative molecular weight mass and high stereo-tacticity were introduced.
介绍了超高相对分子质量和高立构规整度的PVA 制备方法；
The production technologies of PVA with ultrahigh relative molecular weight mass and high stereo-tacticity were introduced.
介绍了超高相对分子质量和高立构规整度的PVA 制备方法；
应用推荐