Q1: What are the raw materials and manufacturing process of molecular sieve activated powder?
A1: The main raw material for molecular sieve activated powder is aluminosilicate. The main manufacturing method involves adding special additives to molecular sieve synthesis powder and then activating it at high temperature to produce molecular sieve activated powder.
Q2: Which adhesive are suitable for using activated molecular sieve powder?
A2:It can be used for any product where trace moisture in the glue will affect the properties of the product. If you use traditional dehydration equipment, the entire dehydration process takes a long time. You can also choose activated molecular sieve powder to speed up the dehydration process.
Q3: What is the difference between activated molecular sieve powder and original zeolite powder?
A3:The difference is that molecular sieve powder is the single raw material for producing molecular sieves, which has low activity and cannot absorb water. Activated molecular sieve powder is a powder with adsorption activity produced by adding specific additives and dehydrating at high temperature.
Q4: What is the recommended amount of activated molecular sieve powder to be added?
A4: Usually, the addition ratio is 3-5%. The amount of activated molecular sieve powder to be added is determined according to the trace amount of water that needs to be removed in the system. The static water adsorption is over 24%, which means that under certain conditions, the amount of water the activated zeolite powder can absorb is 24% of its own weight.
Q5: What's the function of molecular sieve powder?
A5: It is widely used in polyurethane adhesives to remove water, eliminate bubbles, remove odors, improve adhesives' strength and uniformity.
Q6: What is the difference between activated molecular sieve powder and defoamer?
A6: Activated Molecular Sieve Powder uses internal channels for physical adsorption to absorb excess water in the polyurethane system to block the isocyanate reaction. At the same time, Xintao 5A and 13X activated molecular sieve powders can also directly adsorb carbon dioxide gas to play a defoaming role.
The principle of defoamer is to break the balance of foam stability. The defoamer penetrates into the colloidal foam thin layer and forms a monomolecular film, which reduces its adhesion and makes it easy for the thin layer to break, thereby breaking the pores.
Q7: Will activated molecular sieve powder affect the viscosity of adhesives?
A7: Activated powder does not increase viscosity. It is purely physically adsorbed. The addition ratio is low, and it can enhance the bonding strength to a certain extent.
Q8: Will the activated molecular sieve powder release water after absorbing water in the adhesive?
A8: No. Activated powder is also a kind of molecular sieve, which belongs to static molecular sieve and cannot be regenerated in the system. The adsorption and desorption of molecular sieves are conditional. Desorption requires high temperature and low pressure. When used by customers, the molecular sieve activated powder forms a uniform substance with polyurethane and does not have the desorption conditions. This is also the reason why the activated powder cannot be regenerated.
Q9: What factors determine the price of molecular sieve and why is the price of 4A the lowest?
A9: The price of 4A molecular sieve is the lowest because 3A and 5A are replaced from 4A.
Q10: Can molecular sieve powder be added to polyols?
A10: The A component of two-component polyurethane is usually polyester polyol and polyether polyol, and molecular sieve powder is generally added to the A component.
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