As a FIBC lining bag film supplier who has been working in this industry for over a decade, I’ve seen firsthand how many overlooked factors during storage can turn a perfectly good roll of FIBC lining film into material that’s unfit for its intended use. When customers reach out to me asking about their production delays, more often than not, the issue traces back to improper storage rather than a flaw in the film itself. FIBC lining bags are designed to protect bulk materials like powder chemicals, food grains, and plastic resins from moisture, UV damage, and contamination—so the film’s integrity from the moment it leaves our factory until it’s installed is non-negotiable. In this post, I’ll break down exactly what storage requirements our team emphasizes to every client, and why cutting corners here can end up costing far more than taking the time to follow these guidelines. FIBC Lining Bag Film
First, let’s talk about the most basic yet often neglected factor: temperature control. FIBC lining film is almost always made from polyethylene, whether that’s low-density (LDPE), linear low-density (LLDPE), or a blend of both to balance flexibility and strength. Polyethylene is a thermoplastic, which means its molecular structure shifts dramatically with temperature. When the temperature is too high, the film becomes soft and malleable to the point where it can stick together when rolled, or even develop weak spots that tear during the FIBC manufacturing process. On the flip side, temperatures that are too cold make the film brittle—this is a common problem for our clients in regions with harsh winters, where film rolls left in unheated warehouses overnight have cracked edges by morning. Our team recommends keeping storage areas between 15°C (59°F) and 25°C (77°F) at all times. For clients in extreme climates, we’ve seen success with temporary heating mats in small storage bays during winter, and vented air conditioning units in summer—no fancy equipment required, just consistent regulation. We also warn against storing film directly near heaters, furnaces, or even sunny windows, as direct heat exposure can create hot spots that ruin entire pallets of material.
Next, relative humidity (RH) levels play a huge role in film performance. Many people don’t realize that even though FIBC lining film is plastic, it’s not completely impervious to moisture-related degradation—especially over long storage periods. High humidity (anything above 65% RH) can cause the film to absorb small amounts of water vapor, which not only adds unnecessary weight to the rolls but also weakens the molecular bonds of the polyethylene. For food-grade FIBC liners, this is a critical issue because excess moisture can create a breeding ground for mold or bacteria if the liner is used to store dry goods like flour or sugar. On the other end, very low humidity (below 30% RH) makes the film static-prone, which is a nightmare for clients who work with powders that are easily charged—static can cause the film to cling to machinery during FIBC production, leading to jams and waste. To maintain ideal RH levels, we advise clients in humid areas to use dehumidifiers in their storage rooms, and those in dry climates to use humidifiers or even place shallow trays of water near air vents to balance the air. For clients who store film for more than three months, we always recommend adding desiccant packs on top of each pallet to absorb any stray moisture that might seep into packaging.
Then there’s how you store the film rolls themselves—this might seem trivial, but improper stacking or support is one of the top causes of film damage during storage. FIBC lining film is rolled into large, heavy rolls, usually weighing between 15kg and 50kg depending on the film thickness. If these rolls are stored standing on their edges, the weight of the roll can cause the inner layers to compress, creating permanent indentations that lead to uneven stretching during FIBC manufacturing. We’ve had clients tell us that their liners were tearing at random spots, only to realize the rolls had been stored on their edges for two weeks straight. The correct way to store film is horizontally, on flat, stable shelves or pallets that are specifically designed to support their weight. We also recommend stacking no more than four rolls high—any more than that, and the bottom rolls will deform under the pressure. It’s also crucial to store rolls off the ground, not directly on concrete floors. Concrete can leach moisture and oil (from sealants used in warehouses) that can transfer to the film, causing discoloration and reduced strength. Simple wooden pallets or plastic risers work perfectly here, and they’re affordable enough for even small-scale clients to implement.
Contamination is another major storage risk that many suppliers and manufacturers don’t account for. FIBC lining film is often used for sensitive applications, like pharmaceutical powders or organic food products, so even small amounts of contamination can render the film unusable. Dust, dirt, chemicals, and even odors from other stored materials can transfer to the film’s surface if it’s not properly sealed. Our team always ships FIBC lining film in thick, moisture-barrier plastic packaging, but that packaging only works if it’s not damaged during storage. If a package’s seal is torn or punctured, it’s exposed to contaminants in the air, and over time, the film will absorb those pollutants. We advise clients to inspect all packaging upon delivery and reject any rolls with damaged seals. For long-term storage (over six months), we recommend double-bagging the film rolls, or using a shrink wrap over the entire pallet to create an extra barrier against dust and pests. Also, never store FIBC lining film near chemicals, paints, or cleaning supplies—even fumes from these products can react with polyethylene and break down the film’s strength over time. We once had a client who stored film next to a batch of industrial solvent, and within two months, the film had developed tiny holes that caused leaks in their FIBCs—cost them thousands in product returns. That’s a mistake we never want our clients to make, so we include a storage location checklist with every order that outlines which areas to avoid.
UV exposure is a less talked-about but critical storage requirement, especially for clients who work with flexible intermediate bulk containers used outdoors, like those for construction materials or agricultural products. FIBC lining film is formulated to resist UV rays, but only once it’s incorporated into the final FIBC bag—raw film rolls are not protected from sun exposure. If film is stored anywhere with direct sunlight, even for a few days, the UV radiation will break down the polyethylene’s molecular structure, making the film brittle and prone to tearing. We’ve seen this happen to clients who left film rolls in their loading docks while waiting for production, only to find that the outer layers of the film were cracked and useless, even after just a week in the sun. The solution here is simple: store all FIBC lining film in a dark, enclosed space, away from any natural light or artificial UV sources (like industrial UV lights used in printing shops). If a client needs to access film from a pallet stored near a window, we recommend using blackout tarps to cover any rolls that are not being used, to minimize UV damage. For outdoor storage (which we don’t advise, but understand is necessary for some clients), the rolls must be covered with a heavy-duty, UV-resistant tarp that’s secured tightly to keep out light and moisture.
Another factor that’s easy to overlook is shelf life. Even if all storage conditions are perfect, FIBC lining film will degrade over time. The shelf life of our film is typically 12 to 18 months from the date of manufacture, but this can be shorter if storage conditions are poor. We always mark the manufacturing and expiration dates on every roll’s packaging, and we advise clients to follow the “first in, first out” (FIFO) rule when using their film. That means using the oldest rolls first, so that no roll sits in storage beyond its recommended shelf life. We’ve had clients who hoarded film for two years waiting for a price increase, only to find that the film had become brittle and unusable when they finally tried to use it. To help clients track their inventory, our team provides a simple spreadsheet tool with every bulk order that lists each roll’s date of manufacture, so they can easily organize their storage and avoid wasting material.
Now, I want to address a common question we get: what if storage conditions are less than ideal, and a client notices issues with their film before using it? For example, if a roll is stored in high humidity and starts to feel sticky, or if it’s exposed to cold and feels brittle. Our team always recommends testing a small sample of the film before using entire rolls, rather than risking a production run. Simple tests like stretching a small piece of film to check for flexibility, or checking for holes or discoloration, can save a lot of time and money. We also offer free sample testing for all our clients, so they can verify film quality before making a large purchase.
Over the years, we’ve built our reputation as a FIBC lining bag film supplier not just on the quality of our product, but on the support we provide beyond delivery. We know that a high-quality film is only as good as how it’s stored, which is why we take the time to walk every new client through these storage requirements, whether they’re a small family-run factory or a large multinational corporation. Too many suppliers treat storage as the client’s responsibility, but we believe that being a good partner means looking out for our customers’ success at every step—from the moment we manufacture the film to the moment it’s installed into a FIBC bag.
If you’re a manufacturer or producer who works with FIBC lining bags, or if you’re in need of a reliable FIBC lining bag film supplier for your operations, our team is here to help. We can provide custom film solutions tailored to your specific application, along with detailed storage guidance to ensure your material stays in perfect condition. Don’t let improper storage turn your film into waste—reach out to us to discuss your requirements and place an order, so we can support your production needs and help you avoid costly delays.
Food Packaging Film References
- International Organization for Standardization (ISO) 1891:2019, Flexible intermediate bulk containers – Specifications for liners
- American Society for Testing and Materials (ASTM) D4595-17, Standard Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method
- polyethylene Packaging Council (PEPC), “Storage and Handling Guidelines for Polyethylene Packaging Films”, 2022
- Food and Agriculture Organization (FAO), “Handling and Storage of Packaging Materials for Food Grains”, 2021
- Industrial Plastics Association (IPA), “Thermoplastic Film Degradation in Storage Environments”, 2020
Wenzhou Fuya New Material Technology Co., Ltd.
Address: No. 588, Nengke Industrial Park, Shidai Avenue, Longgang City, Wenzhou City, Zhejiang Province
E-mail: fuya2750@gmail.com
WebSite: https://www.fuyafilm.com/
