To keep the ice pack cold longer, you can start from the following aspects:
First, choose the right ice pack
Quality insulation: Select ice packs that use high-performance insulation materials, such as polyurethane foam, aerogel, etc. These materials can effectively block the conduction of external heat and delay the rise of internal temperature. For example, aerogel is a material with excellent thermal insulation properties, which has an extremely low thermal conductivity and can greatly extend the cooling time of the ice pack.
Good sealing: Ensure that the zipper, lid and other parts of the ice pack are tightly sealed. An ice pack with a double seal or a waterproof seal strip can be selected to prevent the leakage of cold air and the entry of external hot air. Before use, check whether there is damage or gap in the seal, and repair or replace the ice pack in time if there is a problem.
Two, the correct use of ice packs
Pre-cooled Ice packs: Pre-cool ice packs in the refrigerator or freezer for a period of time before using them. This can reduce the temperature of the ice pack itself, so that it can play a better cold retention effect when loading items. The pre-cooling time can be determined according to the size and material of the ice pack, and it is generally recommended to pre-cool for several hours or even overnight.
Proper placement of ice packs or ice cubes: Place fully frozen ice packs or ice cubes evenly inside the ice packs. Ice packs or ice cubes can be placed around and at the bottom of the pack to ensure that cold air surrounds everything. At the same time, avoid direct contact with ice packs or ice cubes to avoid frostbite.
Layer items: Use the layered design of the ice pack to store items that need to be kept cold separately from other items. Perishables, beverages, etc. can be placed near the ice pack or ice cube, and some items that do not need to be kept cold can be placed on the upper or outer layer. This can improve the cooling efficiency and extend the cooling time.
3. Optimize the use environment
Avoid direct sunlight: In outdoor activities, try to place the ice pack in the shade and avoid direct sunlight. The heat in the sun will speed up the melting of the ice pack or ice, reducing the cooling time. You can choose to block the sun in the shade, in a tent, or by using a sunshade cloth.
Reduce the number of openings: Each time you open the ice pack, you will let in hot air from the outside, reducing the internal cooling effect. Therefore, minimize the number of times the ice pack is opened, and be quick when taking and placing items to shorten the opening time as much as possible. You can plan the items that need to be removed in advance and take them out at one time to avoid frequently opening the ice pack.
Iv. Other precautions
Keep dry: If the inside of the ice pack is wet, it will affect the insulation effect and reduce the cooling time. Before placing items, ensure that the surface of the item is dry and avoid putting wet items into the ice pack. If the ice pack is accidentally wet, it should be dried in time and stored in a ventilated and dry place.
Check the ice pack or ice cube regularly: Check the status of the ice pack or ice cube regularly during use. If you find that the ice pack or ice has melted part, you can replace or add a new ice pack or ice in time to maintain the cold effect of the ice pack.