Plastic lotion pumps
are one of the most popular methods for dispensing viscous (thick liquid) products in the personal care and beauty industries, and come in various shapes and sizes. When used as designed, the pump will dispense the right amount of product again and again. But have you ever thought about the ingredients in the lotion pump to make it work? Although there are hundreds of different designs on the market today, the basic principles are the same.
Generally speaking, a lotion pump consists of the following components:
The actuator or pump head is what the consumer presses to pump the product out of the container. Actuators are usually made of PP plastic and can come in many different designs-and usually have an upward or downward locking function to prevent accidental output. This is one of the component designs that can distinguish one pump from another in terms of appearance design. This is also the part where ergonomics plays a role in consumer satisfaction.
Screw the entire assembly to the part of the bottle neck. It is recognized as a common neck finish destination, such as 28-410, 33-400. Usually made of PP plastic, usually designed with ribs or smooth side surfaces. In some cases, a shiny metal casing can be installed to give the lotion pump a high-end and elegant appearance.
The gasket is usually installed frictionally on the inside of the bottle cap, and it acts as a gasket barrier to the land area of the bottle to prevent product leakage. According to the manufacturer's design, this outer gasket can be made of a variety of materials: rubber and low-density polyethylene are just two of the many possible options.
Pump housing shell: Sometimes called the pump assembly shell, this assembly fixes all pump components in place and acts as a transfer chamber that transfers the product from the dip tube to the actuator, and ultimately to the user. This component is usually made of PP plastic. Depending on the output and design of the lotion pump, the size of the housing may vary greatly. It should be noted that if you pair the pump with a glass bottle, because the side wall of the glass bottle is thick, the mouth of the bottle may not be wide enough to fit the housing-please be sure to check the installation and function first.
Internal components (internal components inside the housing): These components will vary according to the design of the lotion pump. Some may even have additional components to help the product flow, and some designs may even have additional housing components to isolate the metal spring from the product channel. These pumps are usually referred to as having a "metal-free channel" function, and the product will not be in contact with the metal spring. -Eliminates potential compatibility issues with metal springs.
The long plastic tube made of plastic can extend the range of the lotion pump to the bottom of the bottle. The length of the dip tube will vary according to the bottle that the pump is paired with.
The action of the lotion pump is much like a suction device. Although the law of gravity tells it to do the opposite, it still sucks the product from the bottle into the consumer's hand. When the consumer presses the actuator, the piston moves to compress the spring, and the upward air pressure pulls the ball up into the dip tube along with the product inside, and then enters the chamber. When the user releases the actuator, the spring returns the piston and actuator to their upward position, and the ball returns to its rest position, thereby sealing the chamber and preventing the liquid product from flowing downwards back into the bottle. This initial cycle is called "startup". When the user presses the actuator again, the product already in the chamber will be drawn from the chamber, through the valve stem and the actuator, and then dispensed from the pump to the consumer's hand. If the pump has a larger chamber (commonly found in high output pumps), additional priming may be required before the product is dispensed through the actuator.
The output of plastic emulsion pump is usually in cc (or ml) as the unit. Usually in the range of 0.5 to 4cc, some larger pumps have larger chambers and longer piston/spring assemblies, and output up to 8cc. Many manufacturers provide multiple output options for each of their lotion pump products, allowing product marketers to fully control the dosage.