all about poly bags
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Poly bags are typically made from polypropylene and polyethylene thermoplastics to create a packaging option that is more flexible and durable than paper.TRANSCRIPT
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All About Poly Bags
Poly bags are typically made from polypropylene and polyethylene thermoplastics to
create a packaging option that is more flexible and durable than paper. They can be
used to package everything from food items to storing industrial items. These bags
come in many shapes and sizes for a variety of uses and can be purchased in clear or
with a white write-on block. They are also available in a variety of thicknesses to
accommodate different weights of items.
Clear bags offer several advantages, depending on the items that will be enclosed. In
some instances, the contents may be visually appealing and add to the customer’s
desire to make a purchase. For others, it makes it easier to store items that are similar
and distinguish them from one another.
Reclosable White Block Gusseted
Reclosable poly bags are used in many industries to keep contents clean and moisture-
free. Unlike other types of bags, they can be reused. Bags that are used for food
applications as well as in chemical, and pharmaceutical industries must meet FDA
requirements for use. White block bags offer better organization for multiple sizes of
products by giving an area where the specifics can be quickly and easily noted. For
larger items, gusseted poly bags have expandable sides and fitted bottoms to open
wider so that there is more room while still providing a seal that can be used repeatedly.
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Additional features found in recloasable industrial poly bags are hang holes, double
track closures and slide seals. Most styles are available in an assortment of thicknesses
as well as a variety of sizes.
Flat Anti-Static
Flat poly bags are a good choice for short-term storage for food and other applications.
Unlike the reclosable poly bags, these may be permanently sealed so that they are only
used once. Sealing options include using heat sealers to melt the plastic together or bag
tape or twist ties to fasten.
Poly Bags on a roll offer a convenient resource for quick and easy filling. They can be used in combination with dispensers so that they are readily accessible. These bags are sealed using the same methods as individual bags.
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Bags on a Roll
How to Measure for the Right Size and Thickness of Poly Bag
Once the right style of poly bag has been chosen for the application, it will be necessary
to determine the appropriate thickness. Poly bags are measured in mils, with each mil
being equivalent to 1/1,000 of an inch. For lightweight contents, 1 or 2 mils is usually
adequate while those at 3 or 4 mils are used for medium weight while heavy-duty
contents require those around 8 mils. Even the lightest poly bag has a thicker wall than
the typical grocery store bag while those used in many retail stores are often 2 mils.
Obviously, bags with a greater thickness will be needed when they are used for heavier
contents that might break through due to their excessive weight. Those items that have
sharp points or corners should also be placed in heavier bags to prevent their poking
through. When food items are going to be placed in the bag, it is important to choose
only the wall thickness that is needed. As bags increase in thickness, they also lose
clarity. That means that the contents of a heavier bag will be more difficult to see than
those in a lighter bag.
Once the wall thickness has been chosen, the bag size needs to be determined. If the
bag will be used as a box liner, the width, depth, and height of the box should be
measured. One inch is added to the width and depth while the height should have six
inches added to allow room for coverage of the box’s contents. Even if a box will not be
used to contain the bags, using one that is the right size for the contents will help
determine the right size.
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When determining the right poly bags for the job, consider both the size and the weight
of the contents that they will hold. Also, some items need more protection from their
packaging than others. Another important consideration is how long the bags will be
used. Reusable poly bags are usually a minimum of 2 mils thick or thicker. The thicker
the bag, the longer it will typically last.
About: US Packaging Supplies is the e-commerce division of Alternative Packaging
Solutions Inc. and is located in Downingtown, PA. They offer an assortment of more
than 10,000 products in well-known brands. US Packaging Solutions is a complete
source for all types of packaging needs including all types of poly bags for a wide range
of applications. They also offer corrugated boxes and mailers, mailing bags and
envelopes, stretch film and labels and custom printed boxes to aid in your branding
efforts.