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What is a Plastic Trigger Sprayer? - Maypak

September 12, 2023


A Trigger Sprayer is a type of dispenser that is commonly used for spraying liquids. It consists of a Plastic Bottle that contains the liquid, and a trigger mechanism which is attached to the top of the bottle. When the trigger is pressed, it activates a pump mechanism which draws the liquid up from the bottle and dispenses it out through a nozzle as a fine spray.



   Trigger sprayers are a very popular dispensing method due to their affordability, portability, and convenience. They allow the user to easily dispense a variety of common household liquids like cleaners, pesticides, cosmetics, and more. The basic components of a trigger sprayer are:   


Bottle: This is usually made of plastic materials like polyethylene or polypropylene. It holds the liquid contents and has an opening at the top to attach the trigger mechanism. The size and shape can vary.


Trigger:  This is a movable part attached to the top of the bottle that is ergonomically designed for a finger to press. It is connected to a pump mechanism inside. Pressing the trigger activates the pump to draw up the liquid and spray it out.


Pump Mechanism: This is located inside the trigger assembly and pulls the liquid from the bottle to the nozzle when the trigger is pressed. It uses suction to draw the liquid up through a dip tube and pressure to dispense it. Common designs are piston pumps and bellows pumps.


Dip Tube: This narrow plastic tube extends from the trigger assembly down into the liquid inside the bottle. It has an opening at the bottom that allows the liquid to be drawn up through suction.


Nozzle: This is the output opening where the liquid sprays out from when the trigger is pressed. Nozzle designs affect the spray pattern and droplet size. Adjustable nozzles allow users to control the spray.


Vent System: This regulates the pressure inside the bottle to prevent excessive vacuum buildup as liquid is pumped out. It allows air to flow back into the bottle, enhancing liquid flow.


Spring: This returns the trigger back to its starting position after it's released. The spring maintains trigger position and feel.


Gasket seals: Rubber or plastic seals prevent leakage between components like the trigger, bottle opening, dip tube, and vent system.



   Advantages of Trigger Sprayers:   


• Portable and compact

• Easy to operate with one hand

• Provide controlled dispensing

• Allow spraying in any direction

• Offer adjustable spray nozzles and patterns

• Compatible with a variety of thin, low-viscosity liquids

• Inexpensive to manufacture



   Common Applications and Uses:   


• Household cleaners: Disinfectants, glass/surface cleaners, etc.

• Personal care: Hair sprays, deodorant body sprays, perfume atomizers

• Healthcare and hygiene: Disinfectants, wound cleaners

• Pesticides and insecticides

• Automotive care: Cleaners, polishes, waxes

• Paints and coatings

• Lubricants and degreasers

• Food products: Cooking sprays, whipped cream, flavor extracts



   Types of Trigger Sprayers:   


1. Vertical: The most common orientation where the trigger is squeezed from the top vertically. The nozzle is at the top.

2. Horizontal: The trigger is pressed horizontally from the side. Allows for more ergonomic grip.

3. Angled: The trigger is set at an angle, usually 45 degrees. Combines aspects of vertical and horizontal.

4. Backpack: The trigger is oriented to spray backwards over the shoulder. Used for lawn and garden applications.

5. Mist: Generates a very fine mist spray for cosmetics and perfumes.

6. Foaming: Adds a foam dispensing feature along with liquid spray. For foaming cleaners.

7. Adjustable nozzle: Allows user to control spray pattern and droplet size.

8. Child resistant: Features mechanisms to prevent accidental discharge by children.



   Common Spray Patterns:   


• Stream: Direct concentrated spray in a straight line

• Conical mist: Wide dispersing mist for broader coverage

• Fan spray: Flattened spray pattern covering a wider area

• Foam/gel: Thicker liquid consistency than standard sprays



   Material Considerations:   


• Plastics: Most commonly polyethylene and polypropylene. Durable, inexpensive, recyclable.

• Metals: Used for springs, pumps. Varies from plastic to metal trigger assemblies.

• Elastomers: Rubber gaskets and seals. Ensure leakproof sealing.

• Compatibility: Materials must be chemically compatible with the liquid contents.



   Manufacturing Processes:   


• Injection molding: High volume production of plastic parts like bottles, triggers, nozzles.

• Blow molding: Alternative to produce squeeze bottles.

• Dip molding: Produces rubber gaskets and seals.

• Machining: For metallic components and precision parts.

• Assembly: Components put together via methods like ultrasonic welding.

• Testing: Quality checks done during and after production.



   Industry Standards and Testing:   


• ASTM D3063: Sprayer specifications for durability, sealing, functionality.

• ISO 22736: Testing of mechanical durability under repeated cycles.

• ISO 6179: Testing leakage tightness of trigger sprayers.

• ISO 8169: Testing of child resistance features.

• ASTM D5620: Testing sprayer leakage and seal integrity.



   Innovation and Trends:   


• Ergonomics: More comfortable and easier to use trigger mechanisms.

• Creative packaging: Custom designed aesthetic outer shells and bottles.

• Sustainability: Use of recycled materials, recyclable components.

• Multi-function: Sprayers integrating lights, fragrance, etc.

• High performance: Sprayers for corrosive chemicals, thicker liquids.

• Digital integration: Smart sprayers with tracking, dosing, and connectivity.



So in summary, a trigger sprayer is a portable, cost-effective pump system that allows easy, controlled dispensing of liquids by the press of a finger. The simple but clever design makes them a ubiquitous part of modern cleaning and consumer products. Advancements continue to improve their functionality, performance, and design.



*Maypak packaging is Trigger Sprayers Manufacturer and has been focusing on Trigger Sprayers 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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