The step of the reflective layer is: pasting a reflective film formed by PVC, PU and glass beads on the aluminum layer.
所述反光膜步骤为在铝层上贴由pvc、PU和玻璃微珠形成的反光膜。
The results showed that PU elastomers with broad glass transition temperature and damping temperature could be prepared with three soft segments by semi-prepolymer method at appropriate conditions.
结果表明，选择适当的软段组分和制备条件，通过半预聚体方式制备三软段聚氨酯弹性体是可行的。
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