How Plastic Lotion Pumps Work

Plastic Lotion Pump is also called nozzle, lotion nozzle, push-type lotion pump, quantitative liquid dispenser, etc., and is used in shampoo (milk), shower gel (milk), hair conditioner, body lotion (milk), facial cleanser, hand sanitizer, detergent, laundry detergent, toner, disinfectant, body oil, baby oil, essence, sunscreen, BB cream, foundation, and food packaging products. In terms of product function and structure, it can be divided into ordinary emulsion pumps, vacuum emulsion pumps, oil pumps, bubble pumps, spray pumps, emulsion pumps with springs that do not contact the liquid, and so on.

The working principle of the lotion pump is Boyle's law from a high-level concept: a quantitative gas in a closed container, at a constant temperature, the pressure of the gas is inversely proportional to the volume. "The formula is P1V1=P2V2. The popular understanding is: in a sealed container, the increase in volume leads to a decrease in pressure (suction/suction process), and the decrease in volume leads to an increase in pressure (liquid discharge process).

Generally, lotion pumps are composed of 6-7 injection molded parts (a few products are composed of 4~5 injection molded parts), plus other accessories, such as glass beads (plastic beads, or valve plates), springs, straws, gaskets, etc., a total of About 9~12 parts. However, the basic functions of the product have not changed significantly.