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The Different Types Of Resealable Packaging Material

June 15, 2016


Whether you are in the food, beauty, clothing or technology business, there's one thing that is apparent - there needs to be some sort of packaging to safeguard your products. But how do you decide which one you want to use? There are pros and cons to every material and this post will provide information on the three most common material encountered in resealable packaging.


Poly bags (PE, PET, PP)

 A standard flat all clear polyethylene resealable ziplock bag


Poly bags, more commonly known as plastic bags, are the most popular form of packaging. Most poly bags are transparent or translucent if they have not been color treated. They are also low strength, hardness and rigidity but have high ductility, impact tolerance and water resistance. Because there are a number of synthetic processes to produce poly bags, it costs very little to produce high yields of bags. However, poly bags do not degrade easily, some variants are semi-permeable to certain gases such as oxygen and carbon dioxide and can they can become brittle if exposed to UV rays. Most poly bags are also highly reactive to aromatic or chlorinated solvents and may dissolve upon exposure to those substances.


Poly bags are good if:


1. You are looking for an inexpensive packaging material

2. You are storing items that will go through multiple shipping interactions

3. You are storing something that is dried or non-perishable

4. You would like the item being stored to be on full display


Aluminum foil bags

 Silver Aluminum Foil Standup Ziplock Bags


Aluminum is another popular form of packaging that is commonly used to package food and liquids. It is an extremely lightweight metal that is durable, nonmagnetic, and easily manufactured. It also conducts heat and electricity very well and is corrosion resistant. Aluminum can be broken down and recycled, unlike its poly counterpart. However, aluminum is difficult to find in it's natural state and is usually extracted from the bauxite ore, thereby being more expensive to produce. 


Aluminum foil bags are good if:


1. You have the budget to choose a more aesthetically appealing packaging option

2. You are storing foods or liquids

3. You are storing aromatic compounds (lotions, body scrubs, oils)

4. You want to offer your customers an element of surprise


Kraft paper bags

Kraft Paper Standup Ziplock Bags with Hangholes


Kraft paper is paperboard produced from a chemical pulping process that yields a porous finished product with high elasticity and tear resistance. Kraft fibers can be derived from the pulp of many wood sources, making them more inexpensive than other paper pulp materials. Additionally, kraft paper is biodegradable and can be recycled or composted. It is usually coated with a layer of polyethylene to ensure an effective barrier against moisture and grease.


Kraft paper bags are good if:


1. You are storing powdered goods