With extending the period of hot water foaming time, the density of foamedsheet was decreased.
随着热水发泡时间的延长，泡沫塑料密度呈现负相关的联系。
2
The results showed that PP/LDPE has high-ratio of foaming , the surface of foamedsheet was smooth and has good overall properties.
结果表明： PP／LDPE共混体系的发泡倍率较高，发泡片材表面光滑，气孔细密，具有较好的综合性能。
3
Moreover, the invention provides higher impact strength and tensile strength for products and is a low-foamedsheet special regulator which has small dosage and high efficiency.