All About Woven Polypropylene Bags

All About Woven Polypropylene Bags

Advances in synthetic polymers over the years have given rise to new innovative materials with a wide variety of applications. One such polymer, called polypropylene, has been particularly useful in the packaging industry.

If you’re conducting a web search for FIBCs or bulk bags you may come across the term ‘woven polypropylene bag(s)’. What is woven polypropylene? How is it related to FIBCs and types of bulk bags? In this post, we will address these questions and more.


What is Polypropylene?

Polypropylene, sometimes referred to as polypropene, is a thermoplastic resin material created by the polymerization of propylene. It’s a rugged material that is unusually resistant to chemicals, bases, and acids. These properties are what make it such a great material for a wide variety of industrial uses.

Woven polypropylene is created by taking strips or threads of poly and weaving them together in opposite directions to form a strong, lightweight material. This process is essential to creating useful items like bulk bags.


Polypropylene’s Uses in Packagingwoven polypropylene sandbags, WPP bags, National Bulk Bag

Woven polypropylene’s properties make it especially useful in the packaging industry. These properties include:

  1. Non-toxic – this allows for a variety of alternate applications including the food and pharmaceutical industry
  2. Lightweight – it’s remarkably strong for how light it is, making it great for FIBCs that hold thousands of pounds of material
  3. Breathable – having the woven materials breathable is crucial to certain applications that require airflow.
  4. Low cost – the resin itself is affordable allowing wide access to products that utilize polypropylene
  5. Resistant to acids, bases, and many chemicals – being resistant to chemicals allows woven poly bags to be used in pharmaceutical applications
  6. Printable (can be printed on)


Woven Polypropylene FIBCs

One of the most common uses of woven polypropylene is in FIBCs and bulk bags. The durable, lightweight, high strength material created by weaving strips of poly together is ideal for the construction of FIBCs that carry large amounts of material.

Some common applications for FIBCs include:

  1. Agricultureduffle top FIBC, woven polypropylene bulk bag, National Bulk Bag
    • Food grade bags are perfect for moving feed, harvested food, and other materials in the agriculture industry
  2. Food Packaging
    • Moving massive amounts of food ingredients around the factory floor can be a lot easier using food grade FIBCs
  3. Geo Engineering
    • Usefulness in the construction of irrigation works, roads, railways, mines, etc., have made it one of the most popular geosynthetics
  4. Flood Control
    • Often these bags are used as oversized sandbags for controlling flood waters in areas that require large barriers
  5. Construction
    • The ability to move materials around a construction site as well as storing and protecting other building materials has made bulk bags extremely useful to the construction industry.



product weight + calc.pngThanks for reading!

Thanks for visiting the National Bulk Bag blog! We hope you found this article helpful and informative.

Safety and reliability is our number one priority. Each bag that we sell has a safe working load (SWL) – with the most common being 2,200lbs and 3,000lbs. To make sure the product you’re packing will not exceed the SWL of the bag you’re interested in, you’ll need to know the bulk density of the product you’re packing as well as the cubic foot capacity of the bag.

Click the link below to download our Product Weight Guide and FIBC Volume Calculator to help you determine how much weight a specific bag will hold.




April 10, 2017

Categories: Bulk Bag Construction

About the Author: Jenny Rosa

Jenny Rosa is an Account Manager for the industrial bag division of Rapid Packaging and National Bulk Bag. She received her Associates Degree from St. Cloud State University and was previously a researcher at JNR Adjustment.

Jenny's background at Rapid includes starting in Customer Service in 2015 and making the transition to sales in 2017. Her background in CS has helped her enjoy finding whole packaging solutions. This includes picking out stock options for short term use, to creating custom solutions unique to individual business and industries.

In her free time Jenny enjoys going to concerts - particularly country, pop and rock. She is a die-hard Minnesota Vikings fan and enjoys canning her own food in the fall (her favorite is homemade spaghetti sauce).

Jenny is National Bulk Bag's resident food-grade specialist. This includes but is not limited to pet food, nuts and legumes, and ready-to-eat foods. She understands in depth the stringent rules facing the food industry as a whole and is an expert at helping food companies find the right bag for their product and application. She also has extensive knowledge of woven polypropylene, BOPP, polyethylene, and textile bags.

Browse our 50+ in-stock bulk bags

FIBC Bulk Bags, In Stock FIBC list, National Bulk Bag

We stock one of the largest FIBC Bulk Bag inventories in the United States. Whether you are packing chemicals, food, minerals, resin, sand, soil or any dry flow-able product, we stock or can manufacture a bag to meet your requirements.

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