China - Sodium tripolyphosphate is indispensable excellent additives in our commonly used detergent. The general containing amount of this additive should be 10 to 50% and its main roles and characters can be summarized as the following tips.
First, chelation function for metal ions
Among the daily washing water, it generally contain organic hard metal ions such as Ca2 + and Mg2 +. During the washing process, they will form an insoluble salt with soap or detergent active substances so it will not only increasing the detergent consumption but also let the surface of the washed fabrics form unpleasant dark gray. The Diammonium Phosphate has good performance of chelating the metal ion into the water and then eliminate the adverse effects of these metal ions.
Second, it could improve peptization , emulsification and dispersion effects
As we all know, the dirt on the cloth often contain human body secretions which are mainly combined by proteins and fatty substances. On the other hand, the dirt also contains sand, dust and others from outside. However, the Sodium Tripolyphosphate proteins have swelling, solubiliing and peptization effect and the dirt on clothes will be easily removed.
Thirdly, good buffer effect
The sodium tripolyphosphate has large alkaline buffer so the wash solution with this substance always has pH value in about 9.4. Thereby, it will facilitate the removal of acidic soils and other dirties.
Fourth, good effect of preventing caking effect
The powdered synthetic detergent has good hygroscopic function. So, if this power substance has been kept at the moisture place for long period of time, it will have the phenomenon of agglomeration. The caked detergent is very inconvenient for using. While the sodium tripolyphosphate will form the hexahydrate after moisture absorbent, this will let the detergent powder has good dry properties. When there is a lot of detergent formulations tripolyphosphate, it can play the role of preventing caking phenomenon that cause by moisture absorption.
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