Research on the Performance of Pentane Blown B2 Grade Polyurethane Continuous Board
B2 grade continuous plate polyurethane foam was prepared with polyester polyol,polyether polyol,foam homogenizer,catalyst,flame retardant,polymethylene polyphenyl polyisocyanate(PAPI)and foaming agent pentane etc.as raw materials.The effects of the selection and dosage of polyester polyol,polyether polyol,water,flame retardant,catalyst and foaming agent on the thickness,dimensional stability,adhesion,fluidity,flame retardancy and compressive strength of polyurethane molded foam were discussed.The results showed that the type of polyester polyol had a significant effect on foam mold thickness and final product thickness,and there was no positive correlation between product thickness and strength.Reducing the dosage of water and flame retardant was helpful in improving the thickness and adhesion of products.After reducing the water content,the strength of foam growth direction was improved,and the overall strength difference was not significant.The addition of polyether polyol was helpful for the fluidity of foam system.The selection of milder PIR reaction catalyst was helpful in improving the fluidity of system and the thickness of foam,and had little effect on the overall strength of foam.
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