# Technology and Application of Automatic Packaging Machine for Coconut Milk Composite Film Bags

Coconut milk, as a core ingredient in the processing of tropical specialty agricultural products, is widely used in the food, beverage, and baking industries. Its high viscosity and tendency to oxidize place stringent demands on packaging technology. Traditional packaging methods, such as drum or glass bottle containers, suffer from high costs and significant transportation losses. The composite film bag automatic packaging machine, through technological innovation, has achieved intelligent and efficient packaging of coconut milk—from raw materials to finished products, making it a key piece of equipment for upgrading the industry.

## I. Technological Core: Modular Design and End-to-End Automation

The modern automatic packaging machine for coconut milk composite film bags is based on a modular design and integrates core functions such as metering, filling, and sealing. Taking the SJYB-Ⅶ Class 100 cleanroom high-speed back-sealing fully automatic packaging machine developed by Harbin Said Technology Development Co., Ltd. as an example, its technological breakthroughs are reflected in the following aspects:

1. **Cleanroom Control Technology**: The equipment is equipped with a Class 100 laminar flow purification unit at the top, which uses high-efficiency filters to maintain the particle count of 0.3-micron particles at ≤100 particles/cubic foot. Combined with quartz ultraviolet lamps for powerful sterilization of packaging films, this ensures that coconut milk is packaged in a clean environment, extending its shelf life to 2–3 times that of conventional processes.

2. **Dynamic Metering System**: This system employs a float switch to control the liquid supply via a diaphragm valve, combined with a volumetric metering pump driven by a servo motor, enabling precise adjustment of the filling volume with an error margin of no more than ±0.5%. For instance, for equipment with a 5L capacity specification, the error per bag does not exceed 25 ml, thus meeting the stringent proportioning requirements for coconut milk as a food ingredient.

3. **Adaptability of Composite Films**: Supports multi-layer co-extruded composite films such as PE/PA/PET and PE/AL/PET. The multi-stage sealing blade design enhances sealing strength, providing high tensile resistance and effectively preventing leakage caused by the penetration of coconut milk fat and oils.

## II. Application Scenarios: Full Coverage from Food Processing to Industrial Raw Materials

The application of automatic packaging machines for coconut milk composite film bags has gone beyond the traditional food industry, giving rise to three core scenarios:

1. **Food Industry**: In deeply processed products such as coconut candy, shredded coconut, and coconut milk jelly, bag-packaging machines—with their extra-large capacities ranging from 1 to 25 liters—help reduce packaging costs for businesses. For example, after a Southeast Asian coconut cream processing company adopted the SJYB-Ⅷ model equipment, the packaging cost per ton dropped from 120 yuan for drum packaging to just 38 yuan for bag packaging, resulting in annual cost savings exceeding 2 million yuan.

2. **Industrial Raw Materials Sector**: As a basic ingredient for cosmetics and detergents, coconut milk places extremely high demands on packaging hygiene standards. The Class 100 cleanroom model, equipped with an automatic CIP (Clean-In-Place) circulation cleaning system, can thoroughly remove residual substances from the liquid supply lines, thereby meeting production and processing requirements.

3. **Optimized Cold-Chain Logistics**: The bagged coconut cream uses a flexible composite film, offering 80% improved impact resistance compared to glass bottles, reducing the transportation damage rate from 5% to just 0.3%. Combined with a wide temperature range of -18°C to 45°C, this solution supports cross-regional cold-chain distribution.

## III. Performance Comparison: The Efficiency Revolution of Traditional Processes Versus Smart Devices

Compared to traditional manual or semi-automatic packaging, fully automated equipment achieves a qualitative leap in three aspects: efficiency, precision, and cost.

| Indicator | Traditional Craft | Fully Automatic Packaging Machine |

|--------------|----------------|--------------------|  

| Production Speed | 3-5 bags/minute | 5-20 bags/minute |

| Measurement error | ±3%-5% | ±0.5%% |

| Labor Cost | 4-6 people/line | 1 person operating + inspection |

| Equipment lifespan | 3–5 years | 8–10+ years |

Take a coconut milk production enterprise in Hainan as an example: After introducing the SaiDe SJYB-Ⅶ equipment, the daily production capacity of a single production line increased from 3 tons to 12 tons, labor costs were reduced by 75%, and the rate of customer complaints caused by packaging damage dropped by 92%.

The widespread adoption of automatic packaging machines for coconut milk composite film bags is driving the industrial chain to shift from “raw material supply” to “high-value-added manufacturing.” From technological breakthroughs to industrial applications, these automatic packaging machines for coconut milk composite film bags—characterized by high efficiency, safety, and environmental friendliness—are redefining the standards for tropical agricultural product processing. As Industry 4.0 and the “dual-carbon” goals become increasingly intertwined, this field will continue to generate innovative breakthroughs, offering a Chinese solution to the global food industry.