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11.03.2014, Jena/Windach

SCHOTT and DELO protect passengers

New material composite for displays prevents glass splinters in crashes
Does not break even under great tension: Xensation Cover glass (figure: SCHOTT)
Does not break even under great tension: Xensation Cover glass (figure: SCHOTT)
Jena/Windach, March 10 – The technology group SCHOTT and DELO Industrial Adhesives collaborate in the development of an unbreakable glass cover composite for vehicle displays, thus providing for improved road safety. In doing so, a high-tech adhesive bonds the display to the special glass cover. Both companies demonstrated in a series of tests that their new displays satisfy all safety requirements imposed by the automotive industry, and protect occupants of vehicles against cutting injuries.

Navigation and entertainment screens in cars are becoming ever-larger and are meanwhile the central control point. For the protection of the displays, many manufacturers consider using glass. It gives a pleasing surface feel and a high-quality impression as expected by users of tablets and smartphones, and more and more car drivers, as well. A series of tests conducted by the manufacturer of special glass SCHOTT and the adhesive expert DELO has demonstrated that a combination of high-strength aluminosilicate glass and special adhesives complies with the safety standards of the automotive industry.

The two project partners tested how completely bonded displays behave in a crash compared to conventional displays with an air gap between glass cover and LCD. For this purpose, they conducted head-on crash tests by the criteria of the international ECE R21 standard in which a steel ball with a weight of 6.8 kg impacts on the displays with a speed of 24.1 km/h.

In the tests, the standard displays were completely destroyed by the steel ball and hundreds of glass splinters were blown off in all directions by the impact. In contrast, only the inner liquid crystal display of the completely bonded displays with the special SCHOTT glass broke. The glass covers remains completely intact, which protects the passengers against cutting injuries.

High-strength special glass and flexible high-tech adhesive

For the tests, the floated aluminosilicate glass Xensation® Cover made by SCHOTT was used. This glass type is especially suitable for displays thanks to its high strength. The gap between display and glass cover was filled with a special DELO adhesive. This bonding increases the durability of the composite and its resistance to oscillations and shocks.

The adhesives used are highly flexible and optically completely transparent. In addition, they pass the thermal, humidity and UV yellowing tests of the automotive industry. Their index of refraction is adapted accordingly. Therefore, they clearly reduce disturbing reflections and provide strong contrast. The adhesives can be light-cured within just seconds, taking account of the short cycle times demanded by automotive manufacturers.

High passive safety required

Data of the World Health Organisation (WHO) show that seat belt use in the backseat is compulsory in only 111 countries, excluding the United Arab Emirates or the US states of New York and Michigan. What is more important than the legal provisions is the acceptance of belts. Germany, with a use rate of 97 percent in the backseat, is a positive exception. The USA reach a quota of 70 percent. Russia (8 percent), the Emirates (5 percent) and Mexico (4 percent) trail way behind. Unbreakable displays protect both, backseat passengers and front seat occupants against severe cutting injuries.

SCHOTT is an international technology group with more than 130 years of experience in the areas of specialty glasses and materials and advanced technologies. SCHOTT ranks number one in the world with many of its products. Its core markets are the household appliance, pharmaceutical, electronics, optics and transportation industries. The company is strongly committed to contributing to its customers’ success and making SCHOTT an important part of people’s lives with high-quality products and intelligent solutions. SCHOTT is committed to managing its business in a sustainable manner and supporting its employees, society and the environment. The SCHOTT Group maintains close proximity to its customers with manufacturing and sales units in 35 countries. Its workforce of 15,400 employees generated worldwide sales of 1.84 billion euros for the 2012/2013 fiscal year. SCHOTT AG, with its headquarters in Mainz (Germany) is owned by the Carl Zeiss Foundation.

About DELO:
DELO is a leading manufacturer of industrial adhesives with its headquarters in Windach near Munich, Germany. In the past fiscal year ending on March 31, 2013, 350 employees generated sales revenues of more than EUR 50 million. The company supplies tailor-made special adhesives and complementary equipment for applications in special lines of business – from electronics to the chip card and automotive industry, as well as in glass and plastic design. DELO’s customers include Bosch, Daimler, Festo, Infineon, Knowles and Siemens. DELO has a network of worldwide distributors and sales partners.

Press contact DELO:
DELO Industrial Adhesives
Matthias Stollberg / Katrin Kirchgässner
DELO-Allee 1, 86949 Windach, Germany
Phone +49 8193 9900-212 / -391
E-mail /
Standard display after impact (figure: DELO)
Standard display after impact (figure: DELO)
Press contact
Michael Müller
PR Manager
Hattenbergstraße 10
55122 Mainz
Phone: +49 6131/66-4088
Fax: +49 3641/2888-9141
Further information
Salvatore Ruggiero
Vice President Marketing and Communication
Hattenbergstraße 10
55122 Mainz
Phone: +49 6131/66-4140
Fax: +49 3641/2888-9180