Lunch bags and cold bags can be used for outdoor picnics or daily life. They are used to hold all kinds of food and maintain the temperature and freshness of food. They belong to a kind of outdoor luggage.
Material of cold bag and lunch bag
The most common insulation materials in the market are non-woven fabric + aluminum film pearl cotton. The second is Oxford cloth or polyester.
We can also make cotton canvas lunch bags, which can be waterproof. We can customize all materials.
Design of cold bag and lunch bag
Our custom lunch bags and cold bags are digitally printed. In this way, the printed pattern is more bright.
And our digital printed lunch bag can be washed without fading.
Benefits of customized cold bags and lunch bags
1. Wholesale lunch bags and cold bags are sold in online stores
2. Customize lunch bags and cold bags with logo as promotional gifts (especially for enterprises)
Why can cold bags and lunch bags keep warm/cold?
There are thermal insulation materials in the cold bag and lunch bag. The thermal conductivity of this material is relatively low, which blocks the contact with the air so that the temperature inside the bag can gather in the bag and cannot be directly dispersed, which prolongs the time of temperature loss in the bag and achieves the purpose of thermal insulation.
Generally speaking, cold bags and lunch bags have poor thermal conductivity and slow heat dissipation.
Features of cold bags and lunch bags:
1. Heat preservation and cold preservation
Heat and cold preservation is the most basic function of cold bags and lunch bags. It is a special bag with a short-term heat preservation effect, which can keep cold/heat. The product insulation layer is pearl cotton + aluminum foil tin paper, which can provide a good heat insulation effect.
It should have superior impact resistance, and it is not easy to crack and scratch when pressed or impacted.
This is the first consideration when choosing cold bags and lunch bags. Although different brands of products have different sealing methods, sealing is a necessary condition for the lasting preservation of stored food.
The international sealing measurement standard is evaluated by the moisture permeability test. The moisture permeability of high-quality cold bags and lunch bags is 200 times lower than that of similar products, which can keep things fresh for a longer time.