MONDI

Rain-resistant Splash Bag launched

Standard paper bags for packaging cement and other powdery products are generally vulnerable to rain. To tackle the issue, Mondi, working in collaboration with major cement producer Lafarge, has developed an innovative rain-repellent bag particularly suitable for cement. The new wet-strengthened, machine-finished Splash Bag is designed to absorb less moisture than conventional bags. Its outer ply of Mondi Advantage Protect sack kraft paper has a water-repellent surface and is formulated to keep high tensile strength even in a wet environment. It also helps prevent moisture ingress if conditions are damp or humid during storage.

Advantage Protect sack kraft papers have a water-repellent surface and are formulated to have high tensile strength, to help prevent rupture. For example, the wet tensile strength of Advantage Protect in a grammage of 80 g/m2 is three times higher than that of standard sack kraft paper an impressive figure.

Splash Bag’s water-resistive properties are immediately apparent in side-by-side visual testing versus standard paper cement bags (test conditions simulating direct exposure to rain). “Water gathers on the bag’s surface without being absorbed, then evaporates over a period of several minutes, leaving the bag essentially dry,” explains Cl­audio Fedalto, Deputy COO Mondi Industrial Bags. “By contrast, the standard bag absorbs the water, weakens as a result and may potentially rupture if exposed to extremely wet conditions,” he adds. Results of Cobb tests, which measure the amount of water absorbed into the surface by sized paper over a set period of time, indicate that Splash Bags are resistant to rain for two hours. If inadvertently left in damp (rather than wet) conditions, e.g. on damp sand, the Splash Bag resists moisture ingress for up to 12 hours.

Even after two hours of direct exposure to rain, Splash Bags can be moved, handled and emptied without any difficulties. Bag breakage rates are significantly reduced, leading to genuine cost savings: fewer broken bags translate to lower vehicle and site clean-up costs, fewer trips from warehouse to site, as well as time savings for logistics and site managers. Excellent moisture resistance can also mean better protection of the filling good if conditions are damp or humid at the warehouse. Importantly, none of these advantages comes at the expense of filling speeds or de-aeration rates, which match those of standard bags (in tests performed on Mega Gurley equipment at Mondi’s Bag Application Center in Austria).

According to interviews carried out at construction sites, the Splash Bag has already won generous plaudits from construction workers for its ability to resist rain and moisture when used to package cement. The construction workers surveyed were particularly impressed that the bag shrugs off rain and remains strong and easy to handle even under damp conditions.

//www.mondigroup.com" target="_blank" >www.mondigroup.com:www.mondigroup.com

x

Related articles:

Issue 7-8/2017 MONDI GROUP

Building & construction sector in the focus of Mondi’s interpack presence

From 04.05.–10.05.2017, the international packaging and paper group Mondi highlighted its solutions for customers in the building & construction sector at the interpack in Düsseldorf/Germany....

more
Issue 9/2015 MONDI INDUSTRIAL BAGS

Further progress in the evolution of industrial paper bags

Conventional industrial bags made of paper tend to be vulnerable to rain and moisture. When exposed to direct rain on an unprotected pallet, a standard paper bag absorbs water and may weaken as a...

more
Issue 9/2020 MONDI GROUP

Mondi acquires two paper bag lines and signs exclusive supplier agreements with leading cement producers in Egypt

Mondi Paper Bags, part of the Mondi Group, has acquired two paper bag lines from Helwan Cement Company and InterCement Sacs, two major cement producers in Egypt. Helwan Cement is a subsidiary of the...

more
Issue 6/2017 MONDI

More than one billion cement bags made from Mondi sack kraft paper for Constantia Afripack

The story of Mondi, the international packaging and paper group, and the South African packaging and bags producer Constantia Afripack spans more than 40 years. In the sack kraft paper business, the...

more
Issue 10/2013

Tough conditions for cement bags at the South Pole

After the successful implementation of the Advantage Select sack Kraft Paper in 2-ply cement bag solutions in Asia and Africa, Mondi Kraft Paper is now up for a new challenge – the South...

more