Heat-using processes and temperatures in down jacket production

Down jacket production includes two main stages: down processing and garment manufacturing. Each stage has a certain demand for heat, mainly concentrated in down cleaning, disinfection, drying, fabric finishing, and shaping. The following are specific heat-using processes and corresponding temperature ranges:

1. Down processing stage
2. Down cleaning

• Process: Use high-temperature water to clean the down to remove stains, impurities and grease to ensure the cleanliness of the down.
• Temperature: 40~60°C.
• Heat source: hot water system.

1. Down disinfection

• Process: Sterilize and disinfect the down with high-temperature hot water or steam to ensure compliance with hygiene standards.
• Temperature: 80~100°C.
• Heat source: steam or high-temperature hot water.

1. Down drying

• Process: After cleaning and disinfection, the down needs to be dried quickly at low temperature to maintain its fluffiness and warmth.
• Temperature: 50~70°C.
• Heat source: hot air system or high temperature heat pump.

1. Clothing manufacturing stage
2. Fabric finishing

• Process: Down jacket fabrics need to be softened, shaped and pre-shrunk before production to ensure the quality of cutting and sewing.
• Temperature: 70-90°C (steam finishing); 40-60°C (softening treatment).
• Heat source: steam or hot water system.

1. Garment gluing

• Process: In order to enhance the waterproofness of down jackets, the seams of fabrics need to be glued and heated.
• Temperature: 90-120°C.
• Heat source: electric heating or hot air equipment.

1. Finished product drying and ironing

• Process: Dry or iron the finished down jackets to ensure beautiful appearance and shape.
• Temperature: 60-80°C.
• Heat source: hot air or steam.

Application of high-temperature heat pumps in down jacket production

With the characteristics of high efficiency, energy saving and multifunctional integration, high-temperature heat pumps can be widely used in many links of down jacket production, replacing traditional coal-fired boilers and electric heating equipment, and significantly reducing energy consumption.

1. Down cleaning and disinfection

• Application: The heat pump provides stable 40~100°C hot water for down cleaning and disinfection, replacing traditional boilers.
• Advantages:
• Precise temperature control to avoid damage to down due to excessive temperature;
• Save steam and reduce operating costs.

1. Down drying

• Application: The heat pump provides a 50~70°C hot air system for down drying.
• Advantages:
• The heat pump recycles the hot and humid air discharged during the down drying process, further improving the drying efficiency;
• Avoid high temperature causing brittleness of down fibers.

1. Fabric and garment finishing

• Application: The heat pump provides 60~90°C hot water or hot air for fabric finishing and garment ironing.
• Advantages:
• Replace steam boilers to achieve multiple uses of one machine;
• Reduce heat loss between process links and simplify equipment configuration.

1. Waste heat recovery

• Application: Recover waste heat from washing water and drying air for down preheating and washing or factory heating.
• Advantages:
• Increase waste heat utilization rate to more than 60%;
• Reduce dependence on external energy and achieve energy saving in the entire production process.

High-temperature heat pump transformation case

Energy-saving transformation project of a down jacket production enterprise

• Background: 500,000 down jackets are produced annually, and coal-fired boilers were used for heating, which was energy-wasting and polluting.
• Transformation content:

1. The heat pump system provides hot water (40~90°C) for down washing, disinfection and fabric finishing;
2. The heat pump hot air system is used for down drying and garment ironing;
3. Add a waste heat recovery module to provide a heat source for workshop heating.

• Effect:

1. Energy consumption is reduced by 45%, saving about 1 million yuan per year;
2. Carbon dioxide emissions are reduced by 2,000 tons per year;
3. The process operation is more stable and the product quality is further improved.

Summary of the advantages of high-temperature heat pumps

1. Energy saving and environmental protection: using low-grade heat sources to reduce fossil fuel use and carbon emissions.
2. One machine for multiple uses: meeting multiple needs of cleaning, disinfection, drying and finishing, and improving production efficiency.
3. Stable operation: precise temperature control to meet the diverse needs of down jacket production processes for heat sources.
4. Economical and efficient: reducing operating costs and short investment return cycle.

Conclusion

Today, as energy efficiency and green manufacturing are increasingly valued, high-temperature heat pump technology provides a reliable energy-saving solution for the down jacket production industry. By optimizing the process and improving the utilization rate of thermal energy, high-temperature heat pumps not only help companies reduce production costs, but also help achieve sustainable development goals. If you are interested in the specific application of high-temperature heat pumps, please contact us for professional consultation and technical support!