People who love home cooked meals over takeout or fast food and pack their own lunch for work completely understand the importance of thermal lunch bag since food can go unrefrigerated for hours. Thermal lunch bags are usually designed from heavy yet flexible thermally insulating fabrics like neoprene and polyester that maintain the temperature of bag contents against the exterior environment while controlling moisture and preserving freshness.
The secret behind thermal lunch bags is multi-layer insulation and heat transfer. They are formed with a layer of thin but highly resilient, dense heat-reflective insulation material placed in the space between two surfaces – inner and outer. The inner lining of the bag is usually lightweight, durable waterproof fabric like nylon, poly, and PVC, while the outer layer can be from heavy but flexible materials like rubber, polyethylene, etc.
The layers trap still air or also known as dead air for heat retention. The insulation layer decreases the energy dissipation to the exterior settings, so there’s no heat flow through the bag. That helps to improve thermal efficiency and offers better insulation results. The space between layers reduces the thermal conduction and damage to the insulation that creates a barrier between the cold and hot objects. When two items have different temperatures, the heat is automatically transferred from one element to the other as soon as they are in contact. And once they reach the same temperature, the flow of heat will stop and the bag will maintain a particular temperature.
Long gone are the days when you had to take a big, weighty ice chest with you to the beach or picnic so you could store food or keep the drinks cold. Well, not anymore because thermal bags of today are an all-in-one solution – convenient, light-weight, stylish, reusable, and insulated. They are very similar to those clunky chests, but with excellent features and in small size and better version. You can even carry ice cubes in the thermal bags, and they won’t liquefy for hours. The phenomena of multi-layer insulation is what keeps the contents of the bag hot or cold.
Here at YookeeHome, we offer an array of waterproof, insulated bags in various sizes suitable for different jobs. Our thick insulated thermal cooler lunch bags are available in different prints and colors and ideal for carrying several containers, utensils, water bottle, and other small stuff.
Check our exclusive collection of bags. Not only are these bags excellent for carrying to the campsite, picnic, and beach but also to the office and school.