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There are cleansing creams, gels, mousses and other dosage forms. The raw material formula of cleansing products generally consists of main surfactants, auxiliary surfactants, thickeners, moisturizers, preservatives, flavors and other ingredients. Surfactants are The main “bearer” of the functions of cleansing products ensures the efficacy claims, usage effects and user experience of cleansing products with the multiple effects they achieve. According to the different surfactants in the raw material system, facial cleansing products can be roughly divided into: soap-based facial cleansing products, amino acid-based facial cleansing products, compound facial cleansing products, etc.
Among them, soap-based cleansing products and amino acid-based cleansing products are the two most common types of cleansing products with the highest consumer awareness. Soap-based cleansing products mainly rely on fatty acid systems. The total amount of fatty acids in the formula can determine the stability, foaming effect, appearance and skin feel of the final product. However, soap-based cleansing products have been criticized by some consumers for their strong degreasing ability, high irritation and dry and tight feeling after use.
The main ingredients of amino acid cleansing products are amino acid surfactants. Most of the products are milky white pastes, which can achieve a mild and skin-friendly effect. They have relatively low irritation, good moisturizing and moisturizing properties, and are very popular among consumers. , however, the cleaning ability of amino acid-based cleansing products is relatively weak, especially for oily skin, using amino acid-based cleansing products cannot achieve a good oil removal effect. In addition, pure amino acid cleansing products cannot achieve the refreshing feeling after washing of soap-based cleansing products.
Since cleansing products directly contact human skin, the safety requirements for the use of surfactants are relatively high. In addition, in recent years, the green development of surfactants has gradually become a mainstream trend, such as alkyl glycoside series, chitosan series, sucrose fatty acid esters, etc. A series of natural surfactants that can achieve good biodegradability and environmental compatibility have gradually begun to develop. Some cleansing products that use natural surfactants and their derivatives derived from animals, plants, and microorganisms as raw materials have also received great attention because of their better efficacy and environmental protection.
Anionic surfactants have a large output and occupy a huge proportion in the entire process of surfactant production and application. They have very good performance in separation, emulsification, foaming, decontamination, permeability, etc., mainly including sulfuric acid. Salts, sulfonates, phosphates and carboxylates, etc. Among them, alkyl sulfates have extremely strong foaming ability, excellent moistening, detergency and emulsification properties, and are widely used in shampoo and cleansing products. Fatty acid triethanolamine has good emulsifying properties and can form oil-in-water emulsions in non-aqueous solutions. It is often used in soap bars (liquid soap) and facial cleansing products.
The hydrophobic groups on nonionic surfactants and ionic surfactants are basically similar. They are in a nonionic state in aqueous solution, do not dissociate when dissolved, and have strong stability. This type of surfactant is relatively safe and less irritating to human epidermis. It has excellent chemical stability and is not easily affected by acids, alkalis and water-soluble inorganic salts. Because it is less irritating, it can be safely used in infant cosmetics and sensitive skin. Nonionic surfactants for facial cleansing products include alkyl glycosides, glycol esters, glyceryl esters and their polyoxyethylene derivatives, linear alkanolamides, etc. In cleansing products, glyceryl esters and their polyoxyethylenated derivatives, glycol esters, etc. are also used, which mainly play the roles of stabilization, emulsification, foaming, esterification, and emollient. In terms of foaming, fixation and foaming, linear alkanolamides mainly play an important role. Alkyl glycosides have good stability in acid, alkali and neutral environments, and are often used in cleansing, cleansing and skin care products to emulsify, moisturize and foam.
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