Filtration Adhesion: Whenbond needs hold

Filtration and Adhesion: When the bond needs to hold

6:26 AM, 23rd March 2018
These filters require fast cycling during adhesive dispensing.

When we talk filtration, the extent and importance of the process is never fully understood. Filters are today used in every aspect of our lives right from the cars that we drive to the air-conditioning in our homes to automotive and hospital applications. Today filters serve different needs, from water, that is the most natural thought when we hear the word filter to oil and air filters that are used in the motors that we drive. Apart from these, there are a whole host of applications that use filters, and these are expected to perform in some of the most demanding and extreme environments.

When we talk about water, this is one natural resource that has universal uses right from domestic to industrial. Today, every conceivable manufactured product uses water in some part of its production lifecycle. Industrial water use, includes water used for such purposes as fabricating, processing, washing, diluting, cooling or transporting a product; incorporating water into a product; or for sanitation needs within the manufacturing facility. Some industries such as food, paper, chemicals, refineries, etc. use large amounts of water during the production stages.

Today, the World population is exploding and given the rate at which we have been drawing on nature’s reserves we will soon be staring at a crisis. According to a recent UN alert, in the next twenty years, global demand for fresh water will vastly outstrip reliable supply in many parts of the world. Freshwater makes for just 2.5% of the earth‘s water, and this again is contained in glaciers and groundwater which leaves just enough of the resource actually useable in rivers, lakes and ponds. Which highlights today more than ever the need to filter and recycle water.

Given this impending crisis pertaining to water, manufacturers of liquid filtration systems serving the water treatment, food and beverage industries are constantly faced with the challenge of increasing the reliability and efficiency of their products. At the same time, the cleaning and maintenance costs incurred by filter users need to be kept as low as possible for their processes to remain competitive. High-performance adhesives are indispensable for the production of filters both industrial and domestic. They fulfil important design functions such as the stabilization and end bonding of folded filter media or the joining of filter media to frame parts. The adhesives used must meet high-quality standards, since they will be exposed in use too many different kinds of stresses, resulting from heat, pressure and chemicals.

Filters are normally manufactured in large quantities. These filters require fast cycling during adhesive dispensing. Moreover, the products need to be highly economical.

When it comes to drinking water applications, the end caps on carbon block cylinders are critical to filter function as they ensure that water is forced through the carbon. The end caps also ensure that the filter cartridge seals thoroughly within the housing.

Spiral Wound membranes support a wide range of applications and environmental conditions and need adhesive solutions for both wet and dry membranes. Hollow fibre potting is another application that has universal applications in the filtration process right from drinking water, process water, wastewater, dairy, food & beverage, and medical filtration. As access to healthcare increases in developing countries, there is going to be an increased demand for medical filtration due to an ageing population. And it is here that Henkel’s two-part polyurethane systems offer a range of solutions that suit every need, be it large parts requiring a static process or high-speed production needs with a centrifugal process.

Henkel has developed its new Loctite range of adhesives in specific response to these exacting demands. The product range is characterized by exacting temperature resistance, fastest trim times, highest penetration and the highest blister resistance. The range is compliant with EU Food Approval 10 / 2011, Regulation (EC) No. 1935/2004 (food contact) and Germany’s KTW (water contact), the Loctite range also offers high-temperature stability during the cleaning cycle.

With its Technomelt range, Henkel offers a range of hot melt adhesives that can be used to fix folds in filters, offer good adhesion to low surface energy plastics such as PP and PE, clear and off-white colours to match the end caps, long open times of up to 80 seconds and is compliant with the FDA175.105, KTW and NSF standards

In addition to the core areas of bonding and sealing, Henkel products cover many other related aspects, and can thus serve the entire spectrum of needs along the industrial value chain. Henkel offers state-of-the-art metal pre-treatment technologies, innovative solutions for lubricants, industrial cleaners, and adhesives and sealants for product assembly and packaging.

Thanks to its wide-ranging technical customer service, the organization provides process consultancy, laboratory tests and technical training.

Source: Henkel Adhesives Technologies India Pvt. Ltd


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