固体聚氨酯类似注射成型材料，更适合薄壁截面零件。
Solid polyurethanes are similar to injection moulding materials, and more suited to thinner wall sections.
前言： 目的：了解新型聚氨酯类液体根充材料的根管密封性能。
Objective:To investigate the root canal sealing ability of the novel polyurethane liquid root canal filling material.
介绍了一种丙烯酸聚氨酯类石油储罐外壁隔热防腐涂料，并对涂料配套体系、施工工艺加以说明。
A heat insulating and anti-corrosive acrylic polyurethane paint for exterior of petroleum storage tank is introduced. The coatings system and application process are described.
水解：水和很高的温度可以改变一定的聚氨酯类韧性。颜色改变和原料分成小块，张力和撕力会破坏。
Hydrolysis: Water and high temperature can change the consistency of certain polyurethanes. Colours change and material crumbles into small pieces. Tensile and tear strength deteriorate.
并利用化学分析方法，研究其涂层以及基布的溶解性能，进而研究聚氨酯类涂层与常见纺织纤维基布的定性分析和定量分析方法。
And further research is conducted on the methods of qualitative and quantitative analysis of PU and the textile fibres commonly used for coating substrates.
并利用化学分析方法，研究其涂层以及基布的溶解性能，进而研究聚氨酯类涂层与常见纺织纤维基布的定性分析和定量分析方法。
And further research is conducted on the methods of qualitative and quantitative analysis of PU and the textile fibres commonly used for coating substrates.
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