In daily life, we often use washing powder to wash clothes. We are not strange to washing powder, but many people do not understand the main ingredients of washing powder. There are many kinds of washing powder on the market, and the main ingredients of washing powder are also very different. Let’s let Xiaobian introduce the main ingredients of washing powder in detail.
The main ingredients of washing powder:
Synthetic washing powder
Synthetic washing powder is a powdery (or granular) detergent and is the most common type of synthetic detergent in life. This detergent is a mixture prepared by surface-active and auxiliaries into a viscous slurry which is then spray dried and agglomerated. Washing powder is composed of a variety of chemical components, the main role is surfactants, such as sodium alkylbenzene sulfonate, sodium alkyl sulfonate, sodium sulfoxide, fatty alcohol polyoxyethylene ether, ethylene oxide Copolymer with propylene oxide, etc. Various chemical substances promote each other and make up for each other, which makes the washing and decontamination effect more ideal. These surfactants can also be used directly as detergents, but the decontamination effect is not very satisfactory and the cost is high. Therefore, when preparing the washing powder, some builders and auxiliary agents are added to make the washing powder performance more perfect, and it is convenient to store and use. The general additives for washing powder can be divided into two categories: inorganic salts and organic substances.
Inorganic salt additives
(1) Phosphate. There are sodium orthophosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate and sodium tripolyphosphate. The most common application in washing powder is sodium tripolyphosphate. The polyvalent metal ion in sodium tripolyphosphate has strong chelating ability, and can complex the insoluble polyvalent metal cation to become a soluble complex ion, such as sequestering calcium and magnesium ions in water, so that They do not deposit on the fabric, greatly improving the cleaning performance of the detergent active. Sodium tripolyphosphate also has the functions of dispersing, emulsifying and peptizing fine inorganic particles or fat droplets, which can improve the suspending ability of the dirt and prevent the redeposition of the dirt onto the fabric, thereby improving the washing effect of the detergent. Since sodium tripolyphosphate contains 6 crystal waters, it is not easy to absorb water, so that the washing powder can maintain good fluidity and granularity, so that the finished product is dry, easy to package, and does not cause undesirable phenomena such as dust, moisture absorption and adhesion.
(2) Sodium silicate. It can play a coordinating role when used with other additives. Has a good cleaning effect. It forms a very thin protective layer on the surface of the metal to inhibit the corrosion of the metal surface of the washing machine by phosphate in the washing powder. The aqueous solution of sodium silicate has the ability to suspend, disperse and emulsify the dirt and solid particles in the solution during the washing process, preventing the redeposition of the dirt onto the fabric. The aqueous sodium silicate solution is hydrolyzed to produce a hydroxyl group to maintain a certain pH. This buffering effect saves the amount of surfactant in the detergent.
(3) Soda ash. The fat soil can be saponified to remove the dirt, but it is not suitable to add an excessive amount in the washing powder to avoid damage to the fabric during washing.
(4) sodium sulfate. It is an important filler in washing powder, which can reduce the price of the product, and also reduce the critical micelle concentration of the detergent active, and can play a washing effect when the surfactant concentration in the washing powder is low.
(5) Peroxyacid salt. It mainly uses the active oxygen released by it to oxidize the stain, and as a stain removing agent, it can remove stains such as rust. Commonly used in washing powder is sodium perborate, which contains 10.38% of active oxygen.
Through the above introduction, I believe that everyone has some understanding of the main ingredients of washing powder, hoping to help you choose the right washing powder.
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