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Views:104 Author:Site Editor Publish Time: 2020-09-26 Origin:Site
During the foaming process of the polyurethane foaming machine, there may be several problems such as sudden collapse, foam shrinkage, and thick polyurethane foaming opportunities. Let's understand the initial reasons for these problems together.
During the foaming process of the polyurethane foaming machine, a series of problems such as foam shrinkage, crispness, too soft, core burning, cracking, smoke, shedding, collapsed foam, coarse foam cells, kneading into fine powder, slow foaming at the initial stage of the reaction, slow inspiration, etc.
The polyurethane foaming machine suddenly becomes thick during the foaming process. The reasons for this situation:
1. Gel speed;
2. Low material purity, high flow rate ratio of total chlorine and acid;
3. Uneven mixing of materials;
4. Too much water in foaming agent or polyether;
5. Compound stabilizer, leakage or failure, etc.
Sudden collapse of the polyurethane foaming machine during the foaming process. There are three main reasons for this. One is the failure of the composite stabilizer or the addition of alkaline catalyst; the second is the rate of foaming gas generation, which reduces the number of amine catalyst materials that can be solved; the third is leakage or failure, and the tin catalyst can increase materials.
The above briefly describes a few unexpected problems in the foaming process of the polyurethane foaming machine. For more information on polyurethane, please continue to pay attention to Hitop Machinery. https://www.chinapumach.com/
What are the requirements for the construction of one-component polyurethane waterproof coatings? Due to the advantages of the construction speed and shortened construction period of one-component polyurethane waterproof coatings, it has become more and more extensive in practical applications. Next
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