Static Mixer for Adhesives and High Viscous Fluids
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Stamixco AG Kronaustrasse 10 CH-8404 Winterthur/Switzerland 09.04.30/PS Tel. +41 (0)52 338 17 11 Fax +41 (0)52 338 17 33 info@stamixco.com www.stamixco.com Technical Data Sheet E_TB001-2 StaMixCo Mixer LMXR for Adhesives and High Viscous Fluids Mixing element LMXR Mixing of epoxy resins in an (licensee of BAYER AG) empty pipe and in an mixer LMXR Cross-Section of LMXR Mixer Applications - Mixing/dispersing of high viscosity 2-component adhesives such as poly sulfide, silicone, epoxy resin - For general laminar flow mixing/dispersing of viscous liquids with liquids of similar or very different viscosity or with gases Mixer characteristics The LMXR mixing unit is used for mixing adhesives and other high viscosity fluids. It consists of LMXR static mixing elements mounted inside an housing. Each mixing element (see top-left photo) is made of crossing bars cast to the body of a ring and to each other which results in a monolithic structure that is virtually indestructible. The inlet and outlet of each mixing element comes to a point (edges have a shape like the ridge of a roof) to achieve streamlined flow conditions (no dead spots). This mixing structure is excellent for mixing/dispersing liquids of similar or very different viscosity. Design of the mixer for a specific application is based on customer requirements. These include degree of mixing required, component volumetric flow ratio, viscosity ratio, system pressure, allowable pressure drop, maximum allowed length, etc. The below table specifies the LMXR mixing unit's dimensions as well as the number of mixing elements required for a specific application. The LMXR mixing elements are removable from the housing. Because the mixing elements are virtually indestructible, they can be pressed out of the housing, cleaned and reinstalled. Number of LMXR mixing elements required for laminar flow Volumetric Ratio Component A : B Viscosity Ratio Component A : B Coarse mixing Good Mixing Excellent Mix (95% of Perfect (99% of Perfect (80% of Perfect Mix) Mix) Mix) (CoV = 0.01) (CoV = 0.2) (CoV = 0.05) 7 13 20 1:1 1 - 100 12 18 25 9:1 1 – 100 17 23 30 99 : 1 1 – 100 CoV = variation coefficient of mixed material * The number of mixing elements required is approximate. They can vary depending on the viscosity behaviour of the fluids to be mixed. The above recommendations are valid only for fluids that are soluble in each other in every ratio throughout the operating range. If the viscosity ratio of Component A : B is larger than 100 : 1, the number of mixing elements noted in the above table must be increased as follows: Viscosity Ratio A : B Additional mixing elements LMXR required >100 - 300 5 E_TB-001-R2_Adhesives-high viscous fluids_20090430_Kr.doc >300 – 1'000 6 >1'000 – 3'000 7 >3'000 – 10'000 8

Stamixco AG Kronaustrasse 10 CH-8404 Winterthur/Switzerland Tel. +41 (0)52 338 17 11 Fax +41 (0)52 338 17 33 info@stamixco.com www.stamixco.com Pressure Drop Calculations 3 ∆p [bar] = K x total flow rate [m /h] x viscosity of the mixture [Pas] x number of elements LMXR For coefficient K: see table below "Dimension of the mixing elements LMXR" Dimension of the mixing elements LMXR Type I.D. ME mm 12 18 20 22 27 33 40 O.D. ME** mm 16 – 20 22 – 26 24 – 28 26 – 30 31 - 35 37 – 42 44 – 50 LME mm 8.0 11.25 12.25 13.5 16.5 20.0 24.0 K 3 -1 (m Pa) 2.79 0.560 0.408 0.307 0.166 0.0908 0.0510 Mixing...