What is a mylar bag

A mylar bag is made from biaxially oriented polyethylene terephthalate (BoPET), commonly called polyester film.
Mylar is a very durable, flexible, and reflective plastic film. Polyester film bags can effectively block moisture and air, preventing food from being eroded by bacteria and moisture, so they are widely used in food packaging.
They are widely used in food packaging. Food packaged in polyester film bags can be kept fresh and recycled repeatedly; putting an oxygen absorber in the bag and sealing it can make the food.
The oxygen absorber in the bag and sealing can keep the food for a longer period. However, when using Mylar bags, consumers must choose different sizes and thicknesses depending on the type of food to store and the storage time.

Advantages of mylar bags

Strong barrier capacity: Our mylar bags can be made into three or four layers, with an aluminized layer that effectively blocks moisture and air. This helps to preserve food and prevent spoilage.

Resistant to punctures and tears: The multilayer structure of the Mylar bag is very strong and durable, and it is not easy to tear or puncture during packaging, transportation, and storage.

Light blocking: The opaque structure of the mylar bag blocks light and prevents heat from entering the bag.

Customized service: Provide customers with personalized services, including printing, window design, zipper, etc., especially customized bag thickness, size, and other personalized uniforms.

Unit of measurement mil

1 mm = 39.37mil, 1mil = 0.0254 mm, 1 inch = 1000 mil. Mil is the unit of measurement for thickness. We usually use it to measure the thickness of a Mylar bag.
Generally, the thickness of a Mylar bag ranges from 2 to 7.5 mil. If the bag is the same size, such as height and length, the thicker the bag is, the more expensive it will be because it needs more material to make it.
The thicker the bag, the more expensive it will be because more material is needed. We buy mylar bags to keep our food safe, but with a thickness of less than four mils, light can penetrate the bag.
Light entering the bag is a significant threat to the food inside the bag and will accelerate the decomposition and spoilage of the food, leading to a shorter shelf life. At the same time, mylar bags that are too thin
can be easily punctured, which is another factor affecting the shelf life of the food.
So choosing the right thickness is a good guarantee for us to preserve our food.

Choosing Thickness, Thickness for Different Foods

If you are storing food for a long period of time, a thicker Mylar bag is better. It is thick enough to keep out light, moisture, and heat and also prevent punctures, but the cost of the bag will also go up.
However, the cost of the bag will also go up, so choosing the right thickness is essential.

Ideally, mylar bags should be 4.5 or five mils thick or thicker for long-term storage.
For pasta and spaghetti, choose a mylar bag with a thickness of 6.5 mils.
Flour, grains, and beans should be stored in a mylar bag with a thickness of 4.5 mils or five mils.
For other items that are sharp, such as watches, rings, etc., choose a thickness of 7 mil or more.

Once we know the range of thicknesses for food preservation, we can confidently choose the thickness of the Mylar bag we need while considering the most economical and appropriate thickness for the bag.
You must also know that the thicker the mylar bag, the longer the shelf life of the food; the oxygen absorber is put in the bag, and the outside is labeled conveniently so that the food can be stored ideally.

A Mylar bag thickness of less than 4 mil or 3.5 mil is more suitable for temporary food storage. Although a thinner bag will be easier to puncture, it is also more flexible and affordable.
Although thinner bags are more prone to puncture, they are also more flexible and affordable, making them a good choice for temporarily packaging small quantities of food.

How do I measure mylar bag thickness and size?

When we buy Mylar bags, the size and thickness of the bag will be labeled, so the average consumer does not need to measure the thickness or size. However, if we are a large-volume buyer, we must know how to measure the thickness and size of the bag.
However, we must know how to measure the bags if we are bulk buyers. The thickness and size of the bag have special measuring tools, such as a thickness gauge is specialized in measuring the thickness of the bag, and a micrometer can also be
It probably measures, but it is not as accurate as the thickness gauge. The size of the bag can be measured with a ruler, and these figures have a tolerance range. Within the agreed tolerance, they are compliant.

Because thickness is an essential factor that directly affects the ability of light and moisture to enter the bag and the shelf life of the food, it is necessary to measure the correct thickness and choose the right thickness.

How to seal mylar bag

The mylar bag can be purchased in a configuration with a zipper so that we can store our food better, but the cost goes up. When we buy a mylar bag without a zipper, we need to seal it ourselves.

If we often use mylar bags for food, we can buy a small sealer, which is very easy to seal, or we can use a hair straightener or an iron to seal it.
We can also use a hair straightener or an iron to seal the bag. As long as we apply heat to the bag for 2 to 3 seconds, it will seal quickly.

Food Contact Approvals FDA

The Mylar bag has a multi-layer structure, and the inner layers are in direct contact with food, so we need to purchase Mylar bags made of food-grade materials such as LDPE or RCPP to be able to use them with confidence.

Our mylar bag is BPA-free, made of food-grade material, and FDA-approved so that customers can use it confidently.

Accepting Printing, Building Brands

It is our mission to help our customers build their packaging brands. As a Mylar bag manufacturer, we accept customization and provide customers with bag thickness, size, and printing services.

Conclusion

The various advantages of a Mylar bag proved to be advantageous in preserving food, blocking light, air, and moisture, and keeping food fresh. We also provide Mylar bags for those who need to purchase in large quantities.
We also provide free samples for those who need to purchase large quantities of mylar bags to test various data and check the quality of the bags.

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