In the cosmetics industry, high-viscosity products such as hand creams, facial masks and cream lotions have more stringent requirements for pump selection due to their unique physical properties. These products have poor fluidity. If improper cosmetic pumps are used, it may cause difficulty in product discharge, inaccurate dosage or unnecessary waste.

Characteristics of high-viscosity products
High-viscosity products usually have the following significant characteristics:
Poor fluidity: At room temperature, these products are thick and have poor fluidity, and require greater force when discharged.
Complex ingredients: High-viscosity products usually contain rich ingredients such as oils, waxes and thickeners, which may affect the performance and durability of the pump.
User experience: When using high-viscosity products, users often need to perform precise dosage control to ensure that the effect and experience of each use are optimal.

Selection of pump type
For high-viscosity products, the selection of pump type is crucial. The following are several common pump types and their applicability analysis:
Piston pump: Piston pumps provide strong thrust mechanically, which can effectively overcome the flow resistance of high-viscosity products. Its design usually includes a sealed piston that generates enough pressure to push the product out each time it is pressed. This pump is particularly suitable for hand creams and facial masks with high viscosity.
Paste pump: Paste pumps are designed for high-viscosity products and can discharge products smoothly under less pressing force. They are usually equipped with a larger liquid outlet to effectively reduce the risk of clogging and ensure smooth discharge of products.
Screw pump: Screw pumps use a spiral structure to push high-viscosity liquids and are suitable for extremely thick products. This design can reduce the wear of the pump body material to a certain extent and extend the service life of the pump.

Pump material selection
The ingredients of high-viscosity products are diverse, and the material selection of the pump must have good chemical resistance and wear resistance:
Corrosion resistance: High-viscosity products may contain acidic or alkaline components, so the pump material must have corrosion resistance to prevent reaction with the product. Commonly used materials include polypropylene (PP), polyethylene (PE) and stainless steel.
Wear resistance: High-viscosity products may cause wear to the pump body during discharge, so choosing wear-resistant materials can effectively extend the service life of the pump. Especially in piston pumps, the friction between the piston and the pump chamber will affect the performance of the pump, and the application of wear-resistant materials can significantly reduce this wear.
Sealing performance: Pumps for high-viscosity products require good sealing design to prevent product backflow or leakage when not in use. The sealing material should have good elasticity and durability. Commonly used sealing materials include silicone and fluororubber.

Liquid output and dosage control
In the use of high-viscosity products, accurate dosage control is essential, so the liquid output design of the pump is particularly important:
Adjustable liquid output: Some high-viscosity product pumps are designed with adjustable liquid output, and users can adjust the liquid output per press as needed. This design can improve the use efficiency of the product and reduce waste.
Liquid outlet design: The design of the liquid outlet must fully consider the fluidity of high-viscosity products. Usually, a larger liquid outlet is required to ensure that the product can be discharged smoothly. In addition, the shape and angle of the liquid outlet should also be optimized so that users can easily obtain the required product when using it.