subject: Foam Pu Soft And Hard [print this page] foam foam formula will be divided into hard and soft foam ~ ~ ~.
(A) the basic formula of hard foam idea: A dose higher NCO% ~ ~ ~ with the B agent in short chain diol or diamine content and ~ ~ (A) formula based foam concentrate: high NCO% ~ ~ ~. the agent B in the short chain diol or diamine content and ~ ~.
(B) the basic formula of soft foam concept: A lower dose NCO% ~ ~ ~ with the B agent in short chain diol or diamine content of less or no more than ~ ~ is the most basic concepts of two only ~ ~ and not. necessarily can ~ ~ ~ must be a good amount of control can be achieved B) Basic formula Fragrance: Concepts foam lower% NCO ~ ~ ~ agent B in the short or diol chain diamine content (less or no more than ~ ~. Two basic concepts are not only possible but necessary ~ ~ ~ Amount ~ ~ you must be able to achieve good control.
(C) water is foaming decided your amount of foam density and foam may decide you ~ ~ ~ ~ ~ Why do the hardness can determine the hardness of your ~ ~ ~ mentioned in the beginning can be called Poly PU foam . (urethane-urea) foam ~ ~ one of the urea part of the sources of water ~ ~ ~ urea from the structure of very hard ~ ~ ~ Therefore, the relative amount of water will increase more than the hardness of a certain level (C) soapy water quantity decisions . density foam and foam may decide you ~ ~ ~ ~ ~ Why do the hardness can be considered a hard ~ ~ ~ your mentioned in the beginning is called Poly Foam PU (urethane urea) foam ~ ~ part of the urea water urea from ~ ~ ~ ~ ~ ~ structure is very difficult, so the relative amount of water will increase more than one level of hardness.
PU foam is an art (this is what all of the people for PU agree ~ ~ ~ more can not be denied Bayer's top engineers with the consent) to be good solely by the type of material formulations and the amount of of. to determine a good amount of PU foam to form a ~ ~ ~ long time to foam within the foam close to complete ~ ~ ~ ~ ~ ~ how much flexibility to respond to how much power ~ ~ ~ all by your prescription to decide. ~ ~ ~ I mentioned an example: memory pillow ~ ~ early is the use of silicone foam is made of many materials used in PU foam are replaced by the elastic ~ ~ ~ ~ ~ ~ low resilience foam high density ~ ~. ~ is soft foam ~ ~ ~ Foam PU is the art (this is what everybody for PU OK ~ ~ ~ also can not be denied top engineers Bayer consent) will be good only by the type of formula material and number money To determine the amount of good foam, PU in the form ~ ~ ~ long time foam in foam perfect ~ ~ ~ ~ ~ ~ closing force Nights flexibility of the method of high ~ ~ ~ by your recipe to make. test ~ ~ ~ I mentioned example: memory pillow ~ ~ From the foam to silicone material used in foam, PU has been replaced by ~ ~ ~ The flexibility of the flexibility of low-density foam ~ ~ ~. ~ ~ ~ ~ ~ ~ a soft foam
