New adhesives to optimize filter manufacturing

Forum : High Temperature Adhesive

Filters are used in many different areas and applications to clean air and liquids. When producing consumer and industrial goods, adhesives play a decisive role. To meet the high expectations of industry, Henkel invests in research and develops new technologies. At the FILTECH 2011 trade fair, Henkel will be presenting an up-to-date product portfolio for construction of modern filter systems. 

Henkel will be presenting a cold-cure rigid polyurethane foam adhesive for effective end-cap bonding of liquid and air filters namely Macroplast UK 8524. When compared to conventional products, this adhesive offers numerous benefits: Unlike PVC plastisols, Macroplast UK 8524 can be used and cured at room temperature. This reduces both the cure time and high temperature required which results in significant energy cost savings during the manufacturing process. It also lowers production costs and has a positive impact on environmental performance. Further cost savings are achieved thanks to the rigid foam adhesive’s processing properties: Macroplast UK 8524 foams without needing any further additives, achieving a volume increase of up to 270 percent and forms a closed-cell glue foam with a density of 0.4 g/cm³. As a result, less adhesive has to be used than before, reducing product costs by up to about 30 percent. Another feature worth mentioning is the adhesive’s excellent resistance to engine oil, which makes it suitable for use in automotive industry applications as well. 

In addition Henkel has also developed two other adhesives, Macroplast UK 8630 and 8640 which were specifically engineered for use in transport and other applications. These polyurethane-based products are permanently resistant to bio-diesel and other bio-fuels, thus ensuring the durability of fuel filters in retrofitted vehicles. Another plus is their high temperature stability: With a glass transition temperature (TG) of over 100°C, the adhesives can be used in many different applications. 

Another product from the Macroplast range that will be showcased at FILTECH 2011 is primarily intended for stabilizing water filters. The larger the diameter of the filter, the more unstable it becomes in use. Filters for water and beverage production are frequently very large, and have to withstand high pressures. Henkel has responded to the special needs of the industry by adding a new product to its standard range – Macroplast CR 3526/4200. This is a rigid filter adhesive for stabilizing large-diameter filters. Manufacturers benefit from this new technology by achieving better quality and hence greater durability of the filters. 

Different applications need different adhesives, and Macroplast UK 178 is the preferred choice for spiral wound reverse osmosis filters. This adhesive has already established itself in the USA and Asia in water purification and gas cleaning filters. Macroplast UK 178 meets the highest standards and has been certified in accordance with the U.S. drinking water standard NSF 61. As this product has been very successful overseas, Henkel is now introducing this adhesive in Germany as well. 

Visitors can learn all about the latest product innovations and how Henkel adhesives have made a positive contribution to the filter industry at stand B5 in Hall 1 at FILTECH 2011. 

Henkel AG & Co. KGaA

http://www.henkel.com/press/press-releases-2010-20110202-new-adhesives-to-optimize-filter-manufacturing-31261.htm

Sure-Fire Mixing Technology for Preparing Adhesives Tips

Forum : High Temperature Adhesive

The goal of every industry is to produce high quality products in the most efficient way. When preparing adhesives it is all about how the mixing is performed. Recently there are many new technologies that are being used in manufacturing plants. There are new designs to be considered which may be the solution to many of the challenges mixing presents.

Many previously used mixers used a low speed turbine that churned the mixture. They were reliant on the added solvents to soften the polymers. This was a very time consuming process. Making a batch could take anywhere from 12 to 24 hours. Even then there was a problem with dissolving the resin, especially if it was in slab or pellet form. Several hours of mixing was devoted to just dissolving the resin.

To help speed up the process it is recommended that a high shear mixer be used. It uses a rotor containing four blades and rotates at a high speed. Using high shear it mechanically passes them through the stator openings. As the material is being pressed out, more is being pulled in. The substance is circulated through this process as particles become smaller and smaller which makes them dissolve much easier. The high shear mixer is excellent at dissolving solids into liquids and useful to prepare emulsions. Just switching from the traditional low speed mixing system to the high shear machine drastically reduces mixing time as well as saving power.

There are many advantages for using a SLIM (Solids Induction System) as well. Pressure is used to force ingredients to a high shear zone to be mixed into a liquid stream. One advantage for using the SLIM for preparing emulsions is that is uses lower temperatures to process. It also provides an increased solids loading capability and works virtually dust free.

If the four bladed mixer is not able to significantly reduce particle size an ultra high shear mixer is advised. There are some issues with these homogenizers that makes them less attractive to lab techs. They can require a lot of general maintenance as well as consume a lot of time to clean up. And switching to this type of mixer can be quite costly initially. However, they are effective at reducing particle size for mixing. Actually they can produce very small particles in just one round.

In general, the solvent and bonding agent work together within the adhesive to provide for proper application. Adhesives which contain high-solids cannot be mixed in traditional mixers. This is when a multi-shaft mixer is used. They have two separate agitators which work in tandem. A an anchor (low-speed) is used in conjunction with two high shear devices. This process helps to move the product through the device so that heat is transferred evenly.

The multi-shaft mixer is a closed system and offers the options of either vacuum or pressure mixing. Vacuum mixing helps produce a higher density adhesive. It also helps rid the product of voids that agitators can cause. It can also save by reducing other processing such as de-aeration.

Possibly the best choice is a planetary mixer. They far exceed multi-shaft mixers. It moves the batch through the vessel using far different methods than the limited multi-shaft types. It shifts the temperature zone to closer proximity of the disperser. With agitators that rotate and move throughout the vessel it carries the batch away from the walls and does a more thorough job of mixing. Rather than using a solid stream of liquid it starts with the solids and gradually adds the liquids.

More information about high shear mixer, please visit Marcel Miller’s site: homogenizing blender

Read more: http://www.play-it-forward.org/sure-fire-mixing-technology-for-preparing-adhesives-tips/#ixzz1DXMuI9M7 
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High Temperature Adhesive Overview

High Temperature Adhesive Overview

Forum : High Temperature Adhesive

High Temperature Adhesive Products for Structural Bonding

Our high temperature adhesive has been engineered for a variety of structural bonding applications. The high-temp sealant provides a highly durable and permanent adhesive bond to a variety of substrates; and it is designed to accommodate a large variety of production processes. Among these processes there are the fast setting, 5-minute, room temperature curing adhesives, and unlimited working time one-part adhesives.

temperature adhesives are the perfect choice for bonding surfaces made from metal, porcelain, wood, ceramic, glass, marble, PVC, ABS, concrete, fiberglass, wood,

This high-temp adhesives are waterproof, petroleum/chemical-resistant (when dry), acid-resistant, plus they resist shock, vibration, and extreme temperature fluctuations.

 High-Temp Adhesives for Assembly Procedures

These temperature adhesives and sealants are particularly useful where production methods demand very fast cure times with no volatile solvents and strong tack; or when there is a need to apply the material and have a delay before curing, perhaps to carry out other assembly procedures.

High temperature glue can lighten structures and extend service life in aerospace, marine, electronics, and automotive applications. They can improve aesthetics, simplify assembly processes, and make joints more reliable reducing the need for mechanical fasteners.

In addition, they can withstand structural loads in challenging environments.

 Our advanced high temperature adhesive bonding technologies are increasingly pulling their weight in high-performance structural assemblies. Besides replacing traditional mechanical fasteners like rivets, nuts, bolts, and screws, they are rapidly replacing other bonding techniques such as welding, soldering and brazing.

High Temperature Adhesive - almatthai

Forum : High Temperature Adhesive

AME ADHESIVE HT-1500 APPLICATION * High temperature adhesive use as an adhesive to bondceramic fiber products together or bond ceramic fiber products to metal, brick, castable, refractories. * To bond calcium silicate board & Cover * To bond high temperature materials PHYSICAL PROPERTIES * Maximum Service Temp. 1500 ๐C * Typical chemical analysis (%) Al2O3 65 SiO2 29

NAME SPECY BOND FEATURES Adhesive for mold repair APPLICATION * Bonding Mold * Mold repair PHYSICAL PROPERTIES * Typical chemical analysis (%) CH2CHCOOCH3 55 SiO2H2O 25 (CH3)2CO 20 PACKING : 90 GRAM/TUBE (120 TUBES/BOX)