An emulsion pump, also called a push-button emulsion pump, is a liquid dispenser that uses the principle of atmospheric balance to pump the liquid out of the bottle by pressing, while replenishing the bottle with outside air. The main performance indicators of an emulsion pump include air compression cycles, pump output, downforce, pump head opening torque, rebound speed, and water intake.
Dispensers are divided into two types: cap-type and screw-type. Functionally, they are categorized as spray pumps, foundation pumps, emulsion pumps, aerosol valves, and vacuum pumps.
The pump head size is determined by the diameter of the bottle. Spray pumps typically have a nozzle diameter of 12.5 mm–24 mm and a flow rate of 0.1 ml/puff–0.2 ml/puff. They are generally used in the packaging of products such as perfumes and hair gels. For products with the same nozzle diameter, the length of the connecting tube can be determined according to the height of the bottle.
Emulsion pump heads come in a wide range of sizes, from 16 ml to 38 ml, with a dispensing rate of 0.28 ml/dispense to 3.1 ml/dispense. They are generally used for creams and detergents.
Special dispensers include foam pump heads and push-button nozzles. Foam pump heads are non-air-filling hand-operated pump heads that do not require air filling to produce foam; a light press is all it takes to produce a measured amount of high-quality foam. They are usually equipped with a dedicated bottle. Push-button nozzles are typically used for cleaning agents and similar products.
Dispensers are more complex in composition, generally including a dust cover, a pusher head, a pusher lever, a gasket, a piston, a spring, a valve, a cap, a pump body, a straw, and valve balls (made of steel or glass). The cap and dust cover can be colored, electroplated, or fitted with anodized aluminum rings.
Vacuum bottles are typically cylindrical, ranging from 15 ml to 50 ml, with some available in 100 ml sizes. They have a relatively small overall capacity and rely on atmospheric pressure to prevent contamination of cosmetics during use. Vacuum bottles are made of electroplated aluminum, electroplated plastic, and colored plastic and are more expensive than other ordinary containers. Order quantities are generally not high. Customers rarely create their own molds for dispensers; if they do, they need to purchase multiple molds, resulting in higher costs.