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What is the classification of plastic pumps? - Maypak

July 11, 2023

The plastic pump is made of pp plastic, suitable for packaging facial cleanser, lotion, skin care milk, cleaning and care, hand sanitizer, shower gel, shampoo, disinfectant, medium cosmetics, skin care products, cream, ointment, essence, bath Dew and other daily necessities, cosmetics, pharmaceutical industries.

Quality Of Plastic Pump:

1. The product pumps smoothly and discharges liquid quickly

2. Good sealing, no leakage

3. The spray volume is uniform and the effect is good

Features of plastic pump head bottle cap:

Pumped dose: 2±0.2g

Pumping water: ≤6 times, the length of the straw is within 25CM.

Torque to open the mouth: 72 hours after the assembly of the torque mouth, "2KGF.M≤twist opening force value≤10KGF.CM

Tightness: the bottle is full (water, emulsion) and the product is locked, (normal temperature 43°C, low temperature 10°C) no leakage under any placement situation, vacuum pressure at minus 0.08Mpa, pressure holding for 5 seconds without leakage, Apply an external pressure of 10N and keep the pressure for 3-5 minutes without leakage.

Straw length: length ± 2MM

Destruction test: The product is free to drop 3 times from a 1.2M high level ground, and all parts are not separated.

Service life: ≥20000 times.

Plastic Pump Material Analysis:

BPA Free

BPA is also known as bisphenol A. Adding BPA to plastic products can make it colorless, transparent, durable, lightweight and outstanding impact resistance. It is widely used in plastic bottles, canned food and beverage packaging, milk bottles, water bottles, and glasses. In the manufacturing process of tablets and hundreds of other daily necessities, BPA is a toxic substance that can cause endocrine disorders, cancer and obesity caused by metabolic disorder, threatening human health.


The tight screw cap prevents the leakage of the built-in objects, so you can carry it with confidence.

Weak Acid Resistance

Some cosmetic liquid PS refers to weak acidity, and the unique weak acid resistance of PET material can prevent corrosion, and can better pack items. However, there are still some weakly acidic products that are not suitable, which will lead to material deterioration.


Many pump head covers on the market are made of recycled materials. The pump head covers made of these inferior materials will not only cause pollution and be easily damaged, but also affect the quality of the built-in items.

Precautions For The Use Of Plastic Pumps:

1. Do not put high-concentration essential oils or strong acidic liquids in order to avoid deterioration of the nozzle material

2. Putting the built-in items in separate packages may cause deterioration, please use them as soon as possible, and do not leave them for more than half a year

3. It can be cleaned and disinfected with clean water or alcohol, and it should not be scalded with water exceeding 45°

4. The original parts inside the spray head and so on are not resistant to high temperature, do not soak in hot water exceeding 45° to avoid deformation

There are all kinds of pumps on the market, with different sizes, shapes, and discharge states, etc., so what are the working principles of so many pumps? Is there any commonality between them?

Two Categories Of Cosmetic Pumps

1. Quantitative Pump: The power to spit out the material comes from the outside, usually by hand pressing

2. Aerosol Pump: The power to spit out the material comes from the inside, and it is necessary to add pressure gas while filling the material in the adapted aerosol tank;

Due to different power sources, the two categories of pumps have great differences in functional structure.

This paper focuses on the functional structure of quantitative pumps: a brief introduction to the classification of quantitative pumps, eight functional structures of quantitative pumps, and a diagram analysis of eight functional structures.

Introduction To The Classification Of Quantitative Pumps

※ Classified by spit out state:


2.Lotion Pump:

3.Foam Pump ( Foaming Soap Dispenser ):

※ Classified By Applicable Products:

1.Sprayer: Trigger Sprayer / Fine Mist Sprayer / Crimp Pump Sprayer

2.Lotion Pump: Lotion Pump / Airless Pump / Treatment Pump

3.Foam Pump ( Foaming Soap Dispenser ): Foam Pump

Eight Functional Structures Of Quantitative Pumps

The above-mentioned different types of pumps should have the following eight functional structures in order to achieve normal work:

1. Discharge channel

Generally, the parts that make up the channel include pressure head and nozzle, and the foam pump will be equipped with a filter pipe. The material in the container passes through the action of the pump core and reaches the passage outside the container. This part will determine the discharge state of the material, whether it is mist, liquid or foam.

2. Suction channel

The passage through which the material in the container passes before entering the cylinder through the action of the pump core.

The parts that make up the channel are generally the suction pipe connected to the tail of the cylinder. For vacuum pumps, there is no suction pipe. The continuous upward movement of the large piston in the container or the shrinkage of the flexible container ensures that the material continues to contact the tail hole of the cylinder.

3. Pump material system

The general components include cylinder, piston, ball valve, connecting rod and plug sleeve (lock cover). Under the action of force, the piston reciprocates in the cylinder body, and the valve structures arranged at the front and rear ends of the pump body will open and close sequentially. Under the action of the pressure difference, the material in the container enters the pump body from the suction channel and The process of reaching out of the container through the discharge channel is completed by the cooperation of multiple parts. The parts that make up the system are generally composed of cylinders, pistons, valves, connecting rods, plug sleeves, and the cooperation of the power mechanism.

4. Power mechanism

The piston can only reciprocate in the cylinder under the action of force. The power source of the downward stroke is applied by the user outside, so that the upper pressure rod drives the piston to move downward against the spring force and the friction between the piston and the cylinder. When the user releases the external force, the piston moves in the opposite direction under the action of the spring force. The main parts constituting the mechanism are upper pressing rods and springs, which must be attached to the structure with parts such as cylinders as the base body to function.

5. Convection channel

The material body is continuously spit out from the container to the outside of the container, and the volume occupied by the spouted material body must be replenished with air to ensure the uniform pressure, so that the pump head can continue to work.

6. Anti-opening structure

Inhibition of Unintended Opening

In order to prevent the material body from being ejected due to unexpected pressing of the pump head during the process of packaging, handling, transportation, etc. before it is delivered to the consumer, the pump head must be protected against opening. The commonly used structures with this function are: cover (cover) protection, clip (buckle) protection, thread protection, directional opening protection and other anti-pressure protection structures.

7. Connecting parts

The part that effectively connects the pump to the container. The general components include screw caps, card caps, and are equipped with a tightening piece to ensure airtightness.

8. Accessories

It plays a decorative role, and some also serve as structural parts at the same time. Commonly used structures are: aluminum sleeve for pressure head, plastic sleeve for pressure head, aluminum sleeve for screw cap, plastic sleeve for screw cap, etc.

Diagram Analysis of Eight Functional Structures

1. Trigger Sprayer

2. Fine Mist Sprayer

3. Crimp Pump Sprayer

4. Lotion Pump

5. Treatment Pump

6. Airless Pump

7. Foam Pump ( Foaming Soap Dispenser )

*Maypak packaging is Plastic Pumps Manufacturer and has been focusing on PET containers for more than 17 years and was established in 2006,the company enjoys a good reputation at home and abroad. If you have any questions about lipstick tubes, please contact us.

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