Steam Tunnel Secondary Packaging
A steam tunnel is a specialized device used in various industrial processes, primarily for the purpose of applying steam to the surfaces of products as they pass through the tunnel on a conveyor belt. This process is commonly utilized to heat, clean, shrink, or otherwise treat products and packaging materials.
In a steam tunnel, the item to be treated moves through a sealed enclosure where steam is injected at controlled temperatures and pressures. This steam environment ensures uniform heat application over the entire surface of the item. The design of the tunnel, including its length and the number of steam jets, can vary depending on the specific application needs. As items move through the tunnel, the steam condenses on their surfaces, transferring heat effectively due to the latent heat of vaporization of water. This process can be finely tuned by adjusting the steam pressure, the speed of the conveyor, and the temperature inside the tunnel.
Steam tunnels are integral to modern industrial processes where precise control over heating and treatment is necessary. Their efficiency and versatility make them a popular choice in many sectors, enhancing productivity and product quality.
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01 Steam Tunnel by Processing Type

Steam tunnels can be categorized based on the type of process they are designed to facilitate:
- Shrink Sleeve Labeling: One common use of steam tunnels is in the application of shrink sleeve labels to containers such as bottles or cans. The steam heats the shrinkable plastic sleeve, causing it to conform tightly to the contours of the container.
- Sterilization and Sanitization: Steam tunnels can also be used to sterilize or sanitize products, using high-temperature steam to eliminate bacteria, viruses, and other pathogens from the surfaces of products or packaging.
- Textile and Fabric Processing: In the textile industry, steam tunnels can be used to set dyes, remove wrinkles, and impart a specific finish to fabrics.
- Food Processing: Steam tunnels help in cooking or reheating foods, ensuring uniform heat distribution without direct contact with heating elements.
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02 Benefits of Steam Tunnel in Processing

The use of steam tunnels in industrial processes offers several benefits:
- Uniformity of Heat Application: Steam provides consistent and uniform heat across surfaces, which is crucial for processes like shrink sleeving and sterilization.
- Efficiency: Steam tunnels can process items quickly as they pass through on conveyor belts, making them suitable for high-volume production lines.
- Quality Control: The controlled environment of a steam tunnel helps maintain product quality by ensuring precise heating and treatment conditions.
- Versatility: These tunnels can be adjusted for different products and processes, making them a versatile tool in manufacturing settings.
- Eco-Friendliness: Steam is a clean energy source, reducing the reliance on chemicals and minimizing waste compared to other processes.
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03 Examples of Steam Tunnel Applications

- Beverage Industry: Applying shrink labels to wine bottles, beer cans, and other beverages.
- Pharmaceuticals: Sterilizing equipment and product containers to ensure they are free from contaminants before packaging.
- Food Manufacturing: Cooking or pasteurizing packaged foods to ensure they are safe for consumption.
- Textile Industry: Processing textiles to achieve desired finishes and textures without direct contact with heating elements.
Your Gateway to Seamless Steam Tunnel Solutions
CoPack Connect can connect brands with contract manufacturers and packagers that offer steam tunnel services. We make it easy for businesses to find the right manufacturer for their needs and provide the tools and resources they need to manage their relabeling projects successfully.
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