The popularity of the mylar bags lies in their robust construction. Their ability to safeguard the contents from damage depends on how well they are sealed. The sealing process is carried out through different methods. The choice of sealing method is important because, without a good seal the integrity of the product placed in the mylar bag would be at risk of being compromised. Keep on reading further to find out which technique suits your brand in ensuring an optimal packaging. 

Why Is It Important To Get A Proper Seal? 

The efficacy of the Mylar bags depends on one factor, and that is proper sealing. Seals perform an important task of protecting all the items that are placed in the bags. Mylar itself acts as a barrier against oxygen and light, but sealing ensures that nothing gets a chance to seep in. A proper seal guarantees:

• Prevention from contamination

Food items are placed in Mylar bags to prevent spoilage. A strong seal makes sure that the food’s quality remains unadulterated by blocking all moisture and air from the bag. With the blockage of oxygen, the chance of rusting also reduces considerably. 

• Extended shelf life 

Sealed Mylar bags increase the shelf life of the products by providing an optimal atmosphere. The oxygen-free environment curbs microbial growth to keep the food safe from being contaminated. 

• Protection against static electricity 

Some Mylar bags are needed with anti-static properties to protect sensitive electronics from electrostatic discharge. A strong seal works in conjunction with the Mylars in protecting electric components from static electricity. 

• Quality maintenance 

One of the major concerns of businesses is whether the quality of the product can be retained in the packaging. A sealed Mylar bag is an assurance for those concerns. These bags protect the product’s standard by becoming a barrier to all external contaminants. 

A Detailed Guide On Sealing Methods 

A bag becomes vulnerable to damage without a proper seal. This defeats the purpose of getting a custom packaging for the provision of protection to the product. There can be different ways in which a Mylar bag can be sealed. A comprehensive guide on sealing methods is listed as follows:

Heat Sealing 

The principle of thermoplastic material fusion is utilized to create a tight air seal in the heat sealing method.  The Mylar bags have an inner layer of thermoplastic material that can be melted with the application of heat and pressure to create a strong bond. Mylar heat seal bags are created through the following process:

• Heating: First of all, heat is applied to a localized area with the help of a heat sealing machine. 

• Melting: The inner surface of the Mylar bag melts once heat is applied. The molten area is the one that is ready for binding.

• Pressure: Uniform pressure is applied to eliminate any gaps. This helps in fusing the molten layers together. 

• Cooling and bonding: A strong seal is formed once the material cools. 

Effectiveness 

This method requires careful application of heat to ensure that the seal’s consistency remains uniform so that it can remain useful for a long time. The quality of the heat seal depends on three major factors:

• Temperature
• Pressure

Impulse Sealing 

This method utilizes short bursts of electricity to heat the nichrome wire to a specific temperature. The bag is heated after being placed strategically between two jaws. It melts immediately, and a seal is developed. 

Advantages 

The most attractive feature of instant sealing is that it consumes very little time. This also helps in saving energy because power is only consumed when the bag is placed within the jaws. The pros of impulse sealing are:

• No warmup time
• Energy efficient
• Minimum risk of burning
• Easy to use 

Iron Heat Sealing 

Apart from commercial methods, it is possible to seal Mylar bags at home with the help of flat irons and hair straighteners. The heat is applied to the open end of the Mylar bags so it can melt to form a layer. This method is useful and less costly for small-scale use. But it is important to apply heat uniformly along the area where the seal is to be established to ensure uniform seal strength

Vacuum Sealing 

Custom Mylar vacuum seal bags are prepared when all air is removed from them with the help of vacuum sealers. These bags have an amazing shelf life because they ensure that no oxygen is present, which could potentially aid microbial growth. This is why these bags are suitable for keeping the food fresh and healthy

There are mainly two types through which vacuum sealing can be made possible. These include:

• Standard home vacuum sealers

Air is extracted from the bag with the help of suction. This is an affordable option to create a vacuum seal. But most of the time this method is not compatible with thicker Mylar bags.  

• Chamber sealers 

The entire Mylar bag is placed in the vacuum chamber and air is sucked out of the entire chamber. This equalized pressure that is created in and out of the bag ensures that air is removed efficiently from the bag. 

Ultrasonic Sealing 

This method utilizes high-frequency vibrations to create intense friction that generates heat to melt the lining of the bag. This creates a strong seal to create smell proof mylar bags. The ultrasonic sealing machine is used at a commercial scale for medical and high-tech industries. 

Zipper Sealing

Mylar ziplock bags are created with the help of zipper sealing. These bags allow easy opening and resealing of the bag without the need to use a specific heat sealer. Even though zipper sealing provides optimal protection, heat-seal bags are prefer because they last longer. 

Adhesive Sealing

This is a competitively less common method than heat or vacuum sealing. It utilizes glues or adhesive tapes to form a seal. No molecular fusion takes place in this method. That is why the seal is not very strong. This method is time-efficient and can be useful for short-term uses. 

Which Sealing Method Is Suitable?

It often comes to mind that if the effectiveness of all these methods varies then what parameters decide which method is more suitable? The answer to this is that there are different criteria for choosing the best sealing method for your custom mylar bags which include: 

• Intended use

If you are seeking Mylar bags that can be store for a long time then you should go for heat and ultrasonic sealing. In the case of food items, vacuum sealing is a preferable option because it ensures that the food is not expose to oxygen. 

• Budget constraints 

Ultrasonic and chamber vacuum sealing is expensive because it requires a proper setup consisting of high-end equipment.  On the other hand, iron heat sealing and adhesive sealing can be utilize for short-term uses because they do not have such requirements, which is why they are comparatively cheaper. 

• Accessibility 

Zipper sealing must be consider if the product is to be accesse repeatedly. They can easily be zipp and unzip without any sort of hassle. There is an option of heat-sealing the ziplock bags to enhance their durability.

Final Remarks

Now that you have read the blog, you would know that a proper seal is the linchpin of Mylar bag effectiveness. Seals are important in maintaining the integrity of the product by protecting it from any sort of damage. The efficiency of seals differs depending on the type of method used to create the seal. Head over to Mylarbagmakers and choose how you want your bags to be sealed.