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Most foam is made from polyurethane.
They start by making polyurethane. To make it, you mix a polyol with a diisocyanate. There are many polyols. There are two important isocyanates, toluene diisocyanate and methylene diisocyanate. (Two other diisocyanates are used to make urethane paint.) The choice of polyol governs whether the foam is hard or soft, and how soft or hard it is.
Next, you mix in a blowing agent. The first blowing agent was water, which forms CO2 in contact with diisocyanate. They don't like making insulating foam with water, because the foam doesn't insulate as well.
What else can I help you with?
What is the most common method of communicating the shape and size of an object that is intended for manufacture?
Multi view projection
Change a verb manufacture into a noun?
Manufacture can be used as a verb and a noun. There is also the gerund manufacturing.
What is the difference meaning of manufacturing and manufacture?
manufacturing is to make or process a raw material into a finished product to manufacture is the act or process of producing something so there is no difference just that manufacturing is a verb & manufacture is a noun
Difference between Country of manufacture and country of origin?
The country of manufacture is where it was built and the country of origin is where it was designed, if there really is a difference.
How do you manufacture a CD?
Kool Aid
What method in the manufacture of cars did Henry ford introduce?
Grandma Panties
Who developed the method on which the manufacture of modern pencils is based?
nicolas-jacques conte
What method did Henry Ford pioneer that resulted in a new less expensive way to manufacture cars?
The method that Henry Ford pioneered, that resulted in a new and less expensive way to manufacture cars, is mass production by means of an assembly line technique.
What is the most common method of communicating the shape and size of an object that is intended for manufacture?
Multi view projection
Henry ford's assembly line method of production used some of the manufacture ideas of?
Eli Whitney
What method of production was used to mass produce goods?
Assembly lines in factories (versus home manufacture), using interchangeable parts.
What is the frequent employed method in the manufacture of ointments wherein the active ingredient is mixed with the melted waxes and base?
The frequently employed method in the manufacture of ointments is known as the "fusion method." In this process, the active ingredients are mixed with melted waxes and ointment bases while maintaining a controlled temperature to ensure proper mixing and uniformity. Once the mixture is homogeneous, it is cooled and solidified to form the final ointment product. This method is particularly effective for incorporating heat-sensitive active ingredients into the formulation.
How much does 1 cup of cherry preserves weigh?
It totally varies depending on the method of manufacture. A major variable would be the sweetener used.
What effect did this new method of production have on the manufacture of automobiles and how did those changes affect the rest of society?
other industries also sky rocketed.
What gas is used in large amounts in the manufacture of urea?
NH3 (ammonia), N2 (nitrogen) and/or CO2 (carbon dioxide) depending on the method of synthesis.
Are turbochargers manufactured in china of good quality?
Your question is very generic. In general no matter where manufacture occurs, provided the manufacture is done properly to a specific quality/standard method, the goods will be of the same quality no matter where they are made. However, the legal regime in China does allow for "fake" low quality manufacture to occur and if the component is "fake" then it will not be good quality.
What does FM mean?
Frequency Modulation. It is the method of propagating the electromagnetic wave.
