Author: Site Editor Publish Time: 06-05-2026 Origin: Site
Condensed milk is a concentrated dairy product made by evaporating some of the water. Depending on the production process and product formula, it can be divided into sweetened condensed milk, evaporated condensed milk, and filled condensed milk.
Due to its rich nutritional value, long shelf life, and convenient transportation, condensed milk is widely used in coffee beverages, baked goods, confectionery, ice cream, dairy desserts, and the catering industry. With the continued growth in global dairy product consumption demand, more and more dairy companies are adopting automated condensed milk production lines to improve production efficiency, ensure product quality, and reduce operating costs.
A condensed milk production line is a complete dairy processing system. It is mainly used to process fresh milk or reconstituted milk through standardization, ingredient mixing, sterilization, homogenization, concentration, cooling, crystallization, and filling processes to produce condensed milk products that meet market demands.
Modern condensed milk production lines typically employ PLC automatic control systems, enabling continuous and automated production. They provide real-time monitoring of key parameters such as temperature, pressure, vacuum level, and concentration ratio to ensure consistent product quality.
Depending on customer needs, the production line can use fresh milk or reconstituted Condensed milk as raw materials and can be configured with appropriate concentration, crystallization, sterilization, and filling equipment according to different product types.
Main Product Classifications of Condensed Milk Condensed milk production lines primarily produce three categories of products: sweetened condensed milk, unsweetened condensed milk, and flavored condensed milk. These products differ in their formulation, processing methods, and packaging.
Product Category | Core Features | Key Process Differences | Main Applications |
Sweetened Condensed Milk | Contains a large amount of sucrose (approximately 42%-45%). | Syrup is added during the concentration process to inhibit microbial growth in a high-sugar environment. | Used in coffee creamer, milk tea, baked goods, and bread spreads. |
Evaporated Milk | No added sugar | Contains a large amount of sucrose (approximately 42%-45%). . Requires commercial aseptic sterilization after concentration. | Used in cooking, beverage preparation, and dairy processing. |
Filled Condensed Milk | Contains vegetable fats, sugar, or functional ingredients. | Requires additional blending steps. | Used in chocolate-flavored condensed milk, coffee-flavored condensed milk, and fortified products. |
Condensed Milk Production Line Process Flow:
Condensed milk production involves several key process steps, each affecting the quality, taste, and shelf life of the final product.
1. Raw Material Receiving and Standardization: After fresh milk or reconstituted milk enters the factory, it undergoes quality testing. The fat and non-fat milk solids content is adjusted according to product requirements to ensure stable product quality.
2. Filtration and Pretreatment: After impurities are removed by filtration equipment, the raw milk undergoes preheating to create favorable conditions for subsequent sterilization and concentration.
3. Pasteurization: Pasteurization at 75℃～95℃ is generally used to effectively reduce the number of microorganisms and improve product safety and stability.
4. Ingredient Formulation and Sugar Addition (Sweetened Condensed Milk): For sweetened condensed milk products, sterilized concentrated sugar syrup needs to be added according to the formula ratio.
The timing of syrup addition varies depending on process requirements and may be added before, during, or after concentration.
5. Vacuum Concentration: Vacuum concentration is one of the most crucial processes in condensed milk production.
Under vacuum conditions, water evaporates at lower temperatures (approximately 50℃～65℃), thereby reducing heat damage, preserving the original flavor and nutrients of the dairy product, and increasing the milk solids content.
6. Homogenization: The concentrated emulsion is homogenized using a high-pressure homogenizer to refine and evenly disperse fat particles, improving product stability and a smoother texture.
7. Cooling and Lactose Crystallization Control: For sweetened condensed milk, lactose crystallization control is a crucial process affecting product quality.
During production, the cooling rate needs to be controlled, and an appropriate amount of lactose seed crystals needs to be added to form uniform, fine crystals, preventing a grainy texture or graininess in the product.
8. Finished Product Storage and Filling: After the product enters the aseptic storage tank, it is automatically filled and sealed according to the packaging format.
9. Sterilization Treatment (Oily Condensed Milk): Since oddly sweetened condensed milk does not contain sugar, it usually requires high-temperature sterilization after filling to achieve commercial sterility and extend the product's shelf life.
Due to the high viscosity of condensed milk, filling equipment typically requires an insulated jacket and a high-precision metering system to ensure product flowability and filling accuracy.
Sweetened Condensed Milk: High sugar content, high viscosity, long shelf life. Available in tin cans, tubes, squeeze bottles, Tetra Pak cartons, pouches, and bag-in-box (BIB) packaging.
Evaporated Milk: Sugar-free, good flowability, requires commercial aseptic conditions. Available in tin cans, Tetra Pak cartons, Tetra Pak pillows, PET bottles, and HDPE bottles.
Filled Condensed Milk: Contains added vegetable fats, sugar, or other additives. Available in tin cans, plastic cups, plastic bottles, Tetra Pak cartons, and stand-up pouches.
Common packaging sizes on the international market include:
Product Type | Product Features | Common Packaging Forms |
Sweetened Condensed Milk | High sugar content, high viscosity, and long shelf life | Tin cans, tube packaging, squeeze bottles, Tetra Pak cartons, pouches, bag-in-box (BIB) packaging. |
Evaporated Milk | Sugar-free, good flowability, requires commercial sterility | Tin cans, Tetra Pak cartons, Tetra Pak pillows, PET bottles, HDPE bottles |
Filled Condensed Milk | Add vegetable fats, sugars or other additives | Tin cans, plastic cups, plastic bottles, Tetra Pak cartons, stand-up pouches |
Non-caking dispersion, improving premixing quality
High-shear mixing can quickly break up the milk powder particles and avoid the "fish-eye" caking that is common in traditional mixing. The improvement of premixing quality can shorten the subsequent homogenizing time, and even completely eliminate the high-pressure homogenizing step.
Greatly shorten mixing time
Compared to the traditional process, which requires 30 – 60 minutes, the high shear mixing can reduce the batch time to 5 – 10 minutes, significantly improving the single-batch capacity.
High-solid concentration can be reached directly, eliminating evaporation link
Through high shear mixing, high solid content mixed liquid can be obtained even without evaporation and concentration, saving evaporation equipment investment and operation cost.
Accelerate the dissolution of sugar
The combined effect of particle size reduction and strong mixing greatly increases the dissolution rate of sugar and avoids the crystallization problem caused by residual sugar particles.
Two schemes: adaptive batch type and online type
Batch type: with movable floor stand, easy to transfer between different production lines or ships
Online: Suitable for mass production, quick addition of large amounts of milk powder and sugar, accelerated dissolution through circulation, and minimal aeration and cleaning requirements
Suitable for high viscosity and high temperature operation
Even in the high viscosity stage at the late stage of milk refining thickening, or under pasteurization temperature, it can operate stably and cover the complete process section.
Condensed milk, a widely consumed dairy product globally, involves multiple critical steps in its production, including raw material mixing, sterilization, homogenization, concentration, crystallization, and filling. Whether it is sweetened, unsweetened, or flavored, condensed milk requires stable process control and reliable production equipment to ensure product quality. Modern Condensed milk production lines achieve efficient, safe, and stable manufacturing through automated control, vacuum concentration technology, and advanced filling systems. With the continuous development of the dairy industry, automated Condensed milk production lines will play an increasingly important role in improving product quality, reducing production costs, and meeting diverse market demands.
