What factors affect the quality of polyurethane foam
发布时间： 2018-05-07 15:43 Author: Polyurethane foam machine Source: http: //motokone.com
Published: 2018-05-07 15:43
The consumption and establishment of polyurethane foam from various polyurethane foaming machine
manufacturers, especially the quality of polyurethane foam, directly affects the quality of the project, so it is necessary to pay attention to the control factors that affect the quality of foaming.
Polyurethane foaming machine consumer manufacturers introduce you to the foaming ingredients of polyol, polyol, hydroxyl value, unsaturation, and water, and other factors that we know today. Acid number is a way of hydroxyl number. The higher the acid value, the more polyisocyanate is consumed, but the acid value can be neglected in most cases. In the consumption of polyurethane foam, the reaction temperature and the catalyst concentration and the acidity of the reaction are increased, and the reaction activity of the amine catalyst of the foam is increased, so that it causes serious problems when the foam shrinks and the cells are closed.
The molecular weight of the polyol also has a certain effect on the quality of polyurethane foam. The increase of molecular weight can improve the elongation and melting point of polymers. The molecular weight of the polyether polyol was calculated using the functionality and hydroxyl value. If the degree of unsaturation increases, the molecular weight of the polyether polyol is smaller, and vice versa.
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