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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.
Maiya Legros
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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.
Differences between declaring a method and calling a method?
Declaring a method is when you code for what the method will perform. When you call a method, you are using the method you have written in another part of the program, (or inside the method if it is recursive).
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.
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 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.
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.
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.
What is the break even quantityif the cost of manufacture is the same whichever method is used if A is a fixed cost of 40000 and a variable of 23 and b has a fixed cost of 52000?
There question is incomplete:There is no variable cost given for manufacturing method B. I'll assume it is b.It is unclear as to quantity for which the cost of manufacturing by both methods is the same. I'll assume it is the break-even quantity.The break even point is when the revenue from sales = cost of manufactureSo the question is asking for what quantity is the cost of manufacture using method A equal to the cost of manufacture using method B.cost of manufacture = fixed cost + variable cost × quantityMethod A: manufacturing cost = 40,000 + 23 × quantityMethod B: manufacturing cost = 52,000 + b × quantity→ 40,000 + 23 × quantity = 52,000 + b × quantity→ 23 × quantity - b × quantity = 52,000 - 40,000→ quantity(23 - b) = 12,000→ quantity = 12,000/(23 - b)I'll let you fill in the value of b; if b has no variable cost, b = 0.
