How choice membrane switch keypads right adhesive?

2019-01-23

Membrane switch keypads 9 right choice of adhesive

The adhesive adheres the printed graphic overlay substrate to the final assembly. Usually use 3M adhesive models: 3M9080 3M9448 3M467 3M468, etc.Each type of adhesive has advantages and disadvantages,The right choice of membrane keypads adhesive is critical. Factors to consider when selecting an membrane switch adhesive include:  

1,Adhesion Issues �C What sub-assemblies will the graphic overlay or membrane panel be adhered to? Does the substrate need special cleaning before application? 

2,Material Issues �C What is the relative surface energy? 

3,Surface Texture and Flatness �C Will the application surface be smooth or textured? Is there a curvature to the final product?

4,Service Life of the Product �C What is the expected life span of the product and in what user interface environment?

5,Weatherability and Temperature Range �C Predetermining the operating temperature range and environment is critical. Will the application expand with heat or be exposed to freezing temperatures? 

6,Chemical, Solvent, and Water Resistance �C Is the surface cleaned frequently with chemicals or solvents? Is it exposed to elements such as fuels, insecticides, oil, or salt water? 

7,Shelf Life of the Product �C Many adhesives loose effectiveness over time. How long can adhesives be inventoried?

8,UL Rating and Safety Issues �C Are there government regulations? Is the part utilized in the food and beverage industry? Is flammability a concern?

9,Budget Restrictions �C High performance adhesives can cost more than the substrates. Will a less expensive adhesive meet the necessary requirements?

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