Choosing the Right Size and Thickness of Mylar Bags for Different Needs


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Introduction to Mylar bags

Mylar bags are non-transparent bags, made from metalized polyester. Mylar bags are much firmer and more defiant to gas absorptive than vacuum sealer bags, due to their metalized nature. With Mylar bags, by adding oxygen absorbers air is removed also known as oxygen scavengers.  Oxygen absorbers in Mylar bags will remove the oxygen, but nitrogen or other gases are there, By doing it the actual volume of gas in the bag will only be reduced by approximately one-fifth.

Key Factors of Mylar Bags   

Mylar bags protect the contents from not just gas permeability, but also light, heat, pests, and damage due to impact and environmental factors. Bacteria grow in aerobic environments where oxygen is rich, so the presence of nitrogen and other gases in the sealed bag will not allow bacteria to grow. Mylar bags are made from various layers of overlay food-grade plastic and aluminum. Food is protected in Mylar bags because it will not react with aluminum. After all, a food-grade plastic lining separates them. Mylar bags dispense good light, dampness, and an oxygen barrier to protect the food inside the bag. Whenever you purchase pouches make sure they are of very top-notch quality and are designed for storing food products It is very important to choose the right size and thickness of Mylar bags. The Mylar bag’s thickness matters.

Material used in Mylar Bags

Different materials are used in Mylar bags which is based on advantages. When the material has been decided, they’re overlayed together and a hefty pouch is created which is easy to use. PET/MET PET/ PE mix is used as it acts as a barrier against the sun’s harmful rays.

However, aluminum is not heat-fused, so it needs to be overlayed with other materials like PE. Thinner bags are more vulnerable to puncture damage. All MEPET specs have the same opaqueness/ UV light blocking.

Thickness of Mylar Bags

The thicker the PE layer better the seal strength. For example, to protect your ground coffee, a 4 mil bag is what you will use and if coffee beans are whole, 5 mils might make more sense. The Mylar bag’s Sealant thickness depends on your packaging size. 1.5-2.5 mil is for smaller dimensions, and then there’s 4.5- 6.5 mil for larger ones for longer-term food storage a thicker bag is preferred as insulation is better provided from outside elements. No matter what the thickness is Mylar has the same barrier property as whatever sealant film it is laminated to. While using Mylar bags it is important to remember thickness is only a part of the solution; there’s also the aluminum metallization used for bag production.

Dependence of Thickness

The thickness of Mylar bags depends on how long you want to store the food, the thicker the bag longer the food will be stored. Thick Mylar bags have cushioning inside them so that outside elements have no impact on the stored food. The ideal thickness for long-term storage is 5 to 7.5mil.

If a Mylar bag is 4.5 mils thick then we should avoid long-term food storage because they dispense less protection and insulation and the weight of the food can tear the bag. Mylar bags with a thickness of 5 mils or more dispense great insulation and shielding from sunlight, dampness, and gasses. If you are storing dry food for a long period, then thicker Mylar bags are something you should go for, and Mylar bags typically last more than a year.

There is a slight difference between 5-mil and 7-mil, 5-mil Mylar bags are thick and mouldable, that can be wrinkled easily, but a 7-mil bag is craggy.


By preserving properly in thick Mylar bags with oxygen absorbers you can even store dry food for decades, not just a few years. Thicker Mylar bags are more resistant and do not tear apart easily.
Apart from the fact that thicker Mylar bags are substantial, do not forget that Mylar itself is still a dainty material. Jewelry items i.e., Watches, bracelets, rings other than tools, utensils anything with sharp edges can easily tear the bag apart. Taking extra precautions is a must. Mylar bags can be resealed and reusability is unstirred by their thickness. There are no absolute rules to define which thickness is for which dishes. The key is to never forget that the ideal thickness for long-term food preservation is 5 miles. Several foods or things will be stored better in thicker bags for a longer time of periods. Pasta, such as macaroni, will likely benefit from bags with a thickness of 6+ mils to avoid punctures from sharp edges. Meanwhile, flour, grains, beans, and spices will do fine with 5 Mils.
The sealing procedure of the Mylar bag is unchanged by the thickness of the pack.
In other words, the thickness of Mylar bags protects them from getting ruptured, and the bag’s sturdiness is maintained


To fulfill your needs, you have to choose the right size and thickness of Mylar bags and you have to take a few precautions, if you don’t choose the right size and thickness your storage item will be ruined and external factors will affect them.


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