Sachet packing and sealing machine refers to the fully automatic packaging system that is responsible for undertaking the tasks of film formation, exact dispensing, filling, heat sealing, and cutting. Sachet packaging is commonly applied in the food, cosmetic, medicine, and daily chemical industry where highly accurate packaging is needed for liquids and pastes.
In modern industrial production, the sachet filling and sealing machine has become a core solution for improving packaging efficiency and product consistency. It is especially suitable for sample packaging, single-use sachets, and small-dose consumer products that require stable and hygienic packaging performance.
1. Working Principle of Sachet Filling and Sealing Machine
The working process mainly consists of three core systems: film forming, dosing and filling, and sealing and cutting.
1.1 Film Forming System
The machine first unwinds packaging film and shapes it into a continuous tube through a forming collar system.
This ensures stable sachet formation and consistent alignment before filling.
1.2 Dosing and Filling System
This is the core section of the sachet filling and sealing machine, responsible for ensuring accurate and consistent dosage in each sachet.
The system usually adopts piston pumps or magnetic pumps depending on material characteristics:
- Filling accuracy: ±1%
- Suitable materials: liquid, paste, semi-fluid
In cosmetic production, high-viscosity and semi-fluid products require stable filling performance. Typical products include facial serums, shampoo, conditioner, hair masks, and cosmetic creams.
The SUNHAN SH-FS240LS Automatic Piston Pump Vertical Form Sachet Filling Sealing Machine is designed for such applications. Its key working features include:
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Piston pump driving system
Provides stable and pressure-controlled material delivery, especially suitable for high-viscosity products. -
High dosing accuracy control
Maintains filling precision within approximately ±1%, ensuring consistency across sachets. -
Anti-stringing filling performance
Reduces material stringing and dripping during paste filling processes. -
Air bubble reduction design
Improves flow stability and minimizes air entrapment in serums and creams. -
Improved final packaging consistency
Enhances sealing uniformity and overall sachet appearance quality.
Therefore, it is very appropriate to be used in cosmetic sachet manufacturing lines where texture and appearance have to remain consistent.
1.3 Sealing and Cutting System
After filling, the sachet filling and sealing machine enters the sealing stage:
The heat-sealing process conducted under high temperatures guarantees perfect airtightness, whereas the automatic cutting process is responsible for separating the continuous films into single sachets with perfectly sharp edges.
2.Technical Features of Sachet Filling and Sealing Machine
The machine typically offers the following advantages:
- High-precision filling control within ±1%
- Fully automated production process
- Compatibility with liquid, paste, and semi-fluid materials
- Stable production capacity of 30–45 sachets per minute
3.Applications of Sachet Filling and Sealing Machine
The machine is widely used across multiple industries due to its flexibility and adaptability.
3.1 Cosmetics and Personal Care Industry
The sachet packaging industry makes use of sachet packaging for sample products and smaller dosage items such as conditioners, masks, hair masks, shampoo, and lotions.
Typical equipment is the SUNHAN SH-FS220U Automatic Vertical Form Sachet Filling Sealing Machine, which is suitable for a wider range of liquid and paste products.
Its main features include:
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Dual pump system (piston pump + magnetic pump)
Enables flexible switching based on different material viscosities. -
Integrated production process
Completes forming, filling, sealing, and cutting in one continuous operation. -
Wide material adaptability
Suitable for cosmetic creams, hair oils, facial mask liquids, and light emulsions. -
Flexible sealing configuration
Supports different sealing types based on production requirements. -
Stable small-to-medium batch production performance
Ensures consistent output quality in industrial applications.
3.2 Food Industry Applications
In the food industry, the sachet filling and sealing machine is commonly used for:
- Honey
- Tomato sauce
- Soy sauce
- Edible oil
These products often have high viscosity or strict hygiene requirements, making stable sealing and accurate dosing essential to prevent leakage and ensure shelf stability.
3.3 Daily Chemical and Cleaning Products Industry
In this sector, the machine is widely used for:
- Hand sanitizer
- Disinfectant liquid
- Cleaning paste
- Concentrated detergent
Dosage control is critical in these types of products for correct use and minimal wastage.
4.Conclusion
In conclusion, the sachet filling and sealing machine achieves fully automated and standardized small-dose packaging through coordinated film forming, precise dosing, and heat sealing processes.
With growing variations in packaging needs, there is an increased need for flexible equipment. In practical applications, manufacturers such as SUNHAN can provide equipment configurations that can be adjusted according to different production needs, helping adapt to various product types and packaging requirements.Should you wish to know more about the selection, applications, or production of sachet filling and sealing machines, kindly reach out to us.
5.FAQ
Q1: What products can a sachet filling and sealing machine handle?
This equipment is capable of processing liquids, pastes, and even semi-liquid materials such as honey, sauce, beauty creams, shampoo, and disinfectants. Different pumping systems can be chosen based on the filling material for wider application.
Q2: What is the production speed?
The working speed varies depending on the machine type, packaging material, and sachet size.
Q3: What is the filling accuracy of a sachet filling and sealing machine?
Most sachet filling and sealing machines achieve about ±1% accuracy. High-end models can perform even better under stable production conditions, ensuring consistent quality and cost control.
Q4: Can it handle different viscosities?
Yes.This equipment can process different viscosities by utilizing various types of pumps, including piston and magnetic pumps.
