Affected by the construction conditions, equipment, technology and environment, polyurethane hard foam will appear various abnormal phenomena in the c…
51. The basic reaction of foam preparation A: It refers to the reaction of -NCO with -OH, -NH2 and H2O. When reacting with polyol, the “gel reac…
1, hydroxyl value: 1 gram of polymer polyol contains the amount of hydroxyl (-OH) equivalent to the number of milligrams of KOH, unit mgKOH/g. 2、Equiv…
In recent years the concept of silicone-free shampoo has become increasingly hot, our studio partners planting shampoo, first ask if it is good, and t…
Introduction Seat system mainly consists of seat skeleton, seat polyurethane foam and seat cover. Seat as an important part of the vehicle interior, i…
I. Stability test of silicone oil 1.1 Storage stability test of silicone oil Storage stability of silicone oil at low temperature The silicone oil is …
Mercerized cotton fabric What is mercerized cotton Mercerized cotton fabric, is the first yarn after burning, the line on the surface of the trash hai…
In the process of soft foam, I do not know if you will encounter such a problem, the phenomenon of half collapse bubble, and collapse bubble degree th…
Rigid foam leveling agent (hereinafter referred to as “silicone oil”) model selection and dosage definition is of great importance, it is …
In the future, we will try to explore less isocyanates, after all, not in our grassroots class can control the scope. More about polyether (ester) pol…
First, the most important thing to calculate in the hard foam combination is the ratio of black and white materials (weight ratio) is reasonable, anot…
Recently, we often receive calls from peers from all over the country asking about various technical problems that occur during the production of slow…
