Bulk bags are highly versatile and used in various industries for storing and transporting a wide range of products. From agriculture and mining to construction and chemicals, bulk bags are a reliable and cost-effective packaging solution. 

However, it’s essential to understand the temperature limits of bulk bags and ensure that the products stored within those bags fall within the acceptable temperature range. Failure to do so may have catastrophic effects on your packaging products, which may put your employees and equipment at risk.

Custom Bulk Bags is a leading manufacturer and supplier of bulk bags in South Africa. We produce up to 3.5 million bulk bags per annum, all of which have a minimum safety factor rating of 5:1 and are manufactured in accordance with international standards and regulations. When it comes to storing or transporting products in extreme temperatures, it’s crucial to consider the limitations and potential impact on the bag’s fabric.

How to handle bulk bags safely and correctly

Understanding polypropylene and temperature extremes

Bulk bags are made from woven polypropylene tapes, a thermoplastic polymer. While this creates a highly durable and strong fabric, extreme temperatures can affect its properties. In high temperatures, the polymer molecules can soften, resulting in reduced strength and elasticity. Conversely, in extremely cold temperatures, the polypropylene can become brittle and more prone to tearing or breaking.

Sticking within the recommended temperature limits for bulk bags is essential to ensure the continued strength and durability of the plastic-based fabric. Exceeding these limits can lead to compromised integrity and potential bag failure. Therefore, it’s crucial to know the ideal temperature range for the products being stored or transported in bulk bags.

Two white bulk bags sitting on an automated filling machine

Ideal temperature range for products

While temperature limits may vary depending on the specific design and construction of bulk bags, a general guideline is to avoid exposing them to temperatures below -20°C or above 70°C. Products within this range can be safely stored or transported without significant impact on the bag’s fabric.

For products that exceed these temperature limits, additional measures can be taken to protect both the product and the bag. Inner liners and insulation materials can be used to create a barrier between the product and the bag’s fabric, reducing direct exposure to extreme temperatures. 

For hot products, such as materials that require insulation, custom-insulated bulk bags can be used to maintain temperature conditions during transportation or storage. As a leading bulk bag manufacturer in South Africa, Custom Bulk Bags understands the importance of providing our customers with valuable advice and guidance. 

Inside a cement factory

Our expert team can help you choose the right type of bulk bag for your specific needs, including considering temperature limits and optional extras. We strive to deliver high-quality, durable bulk bags that meet the demands of your industry while ensuring your products are stored and transported safely.

Understanding the temperature limits of bulk bags is crucial for storing and transporting products effectively. Custom Bulk Bags offers a wide range of bulk bags designed to withstand various demands, including temperature extremes. 

Our expert consultants are on hand to guide you through the specification process and ensure that you get the perfect bulk bag for your needs. For more information about our bulk bags, please contact us today.


Custom Bulk Bags is a leading South African manufacturer of woven polypropylene bags for various industries, such as mining, chemicals and food. We are able to produce over 3.5-million bulk bags per year, keeping our customers in stock at all times. Our bags adhere to the highest levels of quality as a result of our stringent in-house testing and quality control programmes.

Custom Bulk Bags holds ISO 9001 certification and we currently have a number of UN-certified designs. We are a Level 2 B-BBEE manufacturer and supplier and fall under the ownership structure of Deneb Investments Limited. For more information on our products, contact sales@custombulkbags.co.za. Follow us on Facebook, LinkedIn and Instagram for our latest news and industry insights.