Screen Printing Application on Automotive Glass

R. Drach

How to achieve two different layers of conductive silverpaste onto automotive wind screens by using only one screen in the printing process.

The heating elements on the wind screen are often produced with two screens and two prints by the screen printing process. The first print is for bus-bars and heating lines. The second print is to increases the silver paste layer in the bus-bar area in order to reduce loss of electrical energy and accelerate the defrosting effect in the main area of the wind screen.

A new generation of screen printing mesh, woven with various thread diameters resulting in different
geometry’s on the same mesh, offers this great advantages. It is possible to print with one single stencil a varying silver deposits in the areas of the busbars and the heating lines.

This is saving a complete step in the printing process and reduces production costs.

The black surroundings of the automotive glass is to protect the adhesive from UV light and any additional printed images are for decoration and/or logos.

Therefore it is important to have an uniform ink layer on a specified density. The Automotive Glass Market, according to the Society of Glass and Ceramic Decorators (SGCD) is continuing to do well, as auto glass manufacturers continue to try to meet the new needs of the customers.

Some of the requirements and trends of the automotive glass segment are low-emissivity glass products (leadfree), thinner glass, faster drying/ processing times and a focus on more global requirements and business (www.sgcd.org).

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The Authors

Mr. Roland Drach Technical Consultant Sefar AG Printing Division Mr. Roland Drach, Technical Consultant of Sefar AG Printing Division, is a specialist for screen making and screen printing technologies. He is the specialist for screen printing frames and engraving ... Read more