Understanding the Applications of Coated FIBC Liners-Rishi FIBC

Understanding the Applications of Coated FIBCs, FIBC Liners and Lined FIBCs

If you are un-initiated to the bulk bags, you will be surprised to know that various types of FIBCs are available. Some are coated while some come pre-installed with the liners. So, how would you know which one would best fit-in to your need? Here is some information that will guide you towards choosing the best one for your business.

FIBC Liners

Here poly liners are inserted into the FIBCs to provide protection against leaks. FIBC liners are highly recommended when you want to store or transport fine powders. The plastic liner used in the FIBC will safeguard the product against moisture.

The use of FIBC liners is in vogue in food and pharmaceuticals industry. Here the liners are typically used with a multi-use bag with a safety ratio of 6:1. After use in the FIBC, the liners are removed, discarded and replaced with a new one. This allows the FIBC bulk bag to be re-used multiple times while only the liner is replaced. This is why many logistics service providers prefer to use poly liners instead of FIBCs with pre-installed liners.

Lined FIBCs

If required, you can purchase FIBCs with pre-installed liners. Here the liners are attached to the woven propylene. In this type of FIBCs, you can get all four main types of FIBCs viz. FIBC, Type C FIBC Bags, Type D FIBC Bags and Pharma Grade FIBC Bags. Your lined FIBCs manufacturer will help you choose the right one.

The only disadvantage of FIBCs with pre-installed liners is that the liners cannot be removed as these are either sewn into the seams or tabbed to the material. The ease of re-use is therefore slightly less with this bag compared to FIBCs that make use of removable poly liners.

Coated Bulk Bags

In case of a coated FIBC, an additional layer of polypropylene film is added to the bag’s fabric, either inside of it or outside, before it is sewn together. This helps to seal the small gaps that may be present in the poly weaves. Usually, inside coating is more preferred as it prevents powdery substances from getting stuck in the weaves of the fabric.

Coated FIBCs are highly popular as these provide an additional layer of protection. This comes especially useful when the cargo is expected to be exposed to dirt, dust or moisture which may impact the quality of the product inside the bags.

Applications of Coated FIBCs – Coated FIBCs are typically used for transporting dry, flowable products that may be in the form of flakes, crystal, powder or granules such as flour, salt, cement, detergents, fine minerals like sugar, sand or black carbon.

How to Choose the Right FIBC?

Whether you should use a coated FIBC, FIBC with a poly liner or a lined FIBC depends on the product you need to transport and its intended application. Coated bags are not as protective as the lined bags against outside contaminants but they are more economical to use. So if safeguarding product is a priority, FIBCs with a pre-installed liner would be a more suitable option. But, if you intend to re-use the bulk bag, or if you require specialty liners like a baffle, or aluminum foil etc, a removable poly liner will suit you more as it can be removed after use and replaced with a new one.

At Rishi FIBCs, we manufacture all types of FIBCs. Our experts will guide you in choosing the best one for your needs. We even offer to customize our bulk bags to suit your specific requirement. Call us to know more about our products.

Using FIBCs for High Temperature Products-Rishi FIBC

Safeguards to Follow When Using FIBCs for High Temperature Products

With the increasing use of FIBCs for transporting chemicals, food and pharma-grade products, there is a constant rise in demand for bulk bags that can endure exposure to high temperature.

Here we discuss the impact of high temperature on FIBCs and the liners and guidelines that need to be adhered to ensure the safe use of FIBC bulk bags in high-temperature applications.

Impact of High Temperature on FIBC

FIBCs are made using polypropylene strands. These strands are woven in a fashion that makes the material strong and flexible. However, exposure to a temperature above 70°F will cause a shift on a molecular level of the polypropylene sheet and cause it to loosen. At this point, due to the molecular lengthening, the bag is weak and the force required to pull to the breaking point is reduced.

At Rishi FIBC, we recommend that FIBCs should not be filled at a temperature higher than 200°F. In case the temperature does exceed 200°F while the product is being filled, we suggest that the bag is tested to gauge the impact of heat exposure. A safety ratio of at least 5:1 is desirable.

If you need bulk bags for filling high temperature products you can request for custom FIBC for high temperature products at Rishi FIBC.

Impact of High Temperature on the Performance of Liners

FIBC liners are typically made of polyethylene film. While manufacturing liners, polyethylene resin is brought to its melting point and extruded in the blown film at a temperature of 400°F to 425°F. When filling product in the FIBC liners at high temperature, it needs to be noted that the liner material starts softening between 195°F and 210°F and will begin to melt if the temperature reaches between 260°F and 295°F. It is therefore highly recommended that lined FIBCs should not be filled with product at a temperature higher than 170°F as above this point molecules soften and start shifting.

If you are required to fill a lined FIBC at high temperature, Rishi FIBC recommends the use of specially designed high-temperature container liners. These allow you a maximum filling temperature of 295°F.

Recommended Guidelines

Rishi FIBC recommends the following guidelines when filling FIBCs at high temperatures:

  • Support the bag from its bottom if you are required to fill the bag with a product which has a temperature higher than 100 F.
  • Do not attempt to move or lift the bag by its loop or to stack filled FIBCs if it has been exposed to a more than recommended temperature until the surface temperature of the FIBC fabric drops to a below 100°F.
  • Apart from the peak exposure reached by the FIBC, the duration for which it was exposed to heat will also determine the performance of the filled-in FIBC bag so judge the sturdiness of the bag accordingly.
  • Do not stress the fabric, liner or any other component of the FIBC while it is at a high temperature as it is bound to have an impact on its performance.

Need FIBC for High Temperature Products? Contact Rishi FIBC

Certain industries such as pharmaceuticals, food and chemical industries require the use of high temperature tolerant FIBCs to ensure safe and efficient transport of products. In such industries, there is a need for bags that can withstand the high temperature of products as they get filled after coming out of certain processes. At Rishi FIBC, we offer you custom FIBCs that can withstand exposure to high temperature and also remain durable for re-use and be refilled with high temperature materials. Give us a call to know more about our products and to discuss your specific requirement.