1. Definition and application

* A plastic spray head is a nozzle for liquid or gas injection, which is composed of a nozzle, a spray hole and a filter.
* Plastic spray heads have a wide range of applications in various fields, such as cosmetics, medicine, agriculture, industry, etc.
* In the field of cosmetics, plastic spray heads are often used to spray liquid cosmetics such as lipstick, perfume, toner, etc.
* In the pharmaceutical industry, it is used in medical devices such as syringes and nebulizers.
* In the agricultural sector, plastic spray heads are used for irrigation and agricultural product protection.
* In the industrial field, it is used for cleaning, painting and spraying.

2. Structure composition

* Plastic spray head is mainly composed of nozzle, valve, extrusion rod, spring and other components.
* The nozzle, as the core component of the nozzle, determines the shape and flow rate of the spray.
* The valve controls the flow of the spray, while the extrusion rod and spring ensure that the valve is open and closed.

3. How it works

* Plastic spray heads work by spraying liquid or gas out through pressure.
* When the liquid or gas enters the nozzle, the liquid or gas is sprayed out through the nozzle hole due to the change in pressure.
* Factors such as the size, location and number of the nozzle holes will affect the flow rate and injection effect of the liquid or gas emitted.

4. Spray method

* There are two main spray methods for plastic spray heads: spray and linear.
* Spray method refers to the formation of small droplets after the liquid is sprayed, which is suitable for spraying atomizer and other occasions.