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Polypropylene Bags

Polypropylene Bags

The photo shown is an example of bag style only. Dimensions listed represent the actual size.

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Polypropylene (PP) is a raw material designed to provide many benefits not offered with conventional poly bags. This product provides added strength and clarity while reducing the moisture/vapor transmission rate (MVTR). The result is a clearer bag which when properly sealed can extend the life of many products which may suffer from exposure to ambient conditions.

While most polyethylene bags are unreliable in the freezer, polypropylene freezes well. You'll have less risk of breakage in sub-freezing temperatures than you have with most polyethylene-based bags.

Our high clarity polypropylene products offer a multitude of advantages.  The high clarity and gloss makes for a beautiful retail presentation.

Whatever your specific requirement, we have a excellent selection of options from which you can choose. Our packaging professionals are here during business hours to help you determine exactly which product will work best for you. We'll also answer your after-hours inquiries on the next business day.

Other advantages include the low moisture/vapor transmission rate (MVTR). "What's that?" you ask? It is the thing that gives food products a longer shelf life. To gain the most from this advantage, plan on using a good bag sealer to insure that your package is air tight.

What is a Polypropylene Bag? What Does Polypropylene Bag Mean?

Our polypropylene products are produced using one of three extrusion processes. Blown polypropylene is the most basic manufacturing process where the plastic film is produced by “blowing” air into a circular die. While all PP products are commonly referred to as more “crinkly” than polyethylene, blown polypropylene typically results in a finished product which is softer to the touch than those PP products produced using other processes.

Cast polypropylene is a bit more “stiff” than the blown version, and it offers slightly better clarity than its blown counterpart described above. The extrusion process is a linear die which produces a sheet instead of a tube.

Biaxially oriented polypropylene (BOPP) is cast and then stretched in two opposing directions; This includes the machine direction, or the direction in which it comes out of the die, plus the transverse direction, or the direction from side to side of the extruded sheet. BOPP has both the highest clarity and the most strength when compared to other flexible packaging methods of PP production. It is also the most stiff (thus “crinkly”) of the three finished products.

Any of the above three processes can include coextruded (Coex) film. Coextrusion simply means that two or more dies run concurrently during the extrusion process, and while it results in a single sheet or tubing, the molecular structure of that finished product is stronger than a monolayer produced in the same manner and of the same thickness. By having two or more layers inside, any weakness in one layer is normally overcome by the different alignment of molecules in the second layer.