Development and manufacture of bullet-resistant glass and laminated safety glass to STANAG 4569
CONTREF GmbH Glas- und Kunststoff-Spezialverbunde
Pestalozziweg 62, 31073 Delligsen · Kaierder Str. 26, 31073 DelligsenNew on Amplifa
About us
CONTREF GmbH Glas- und Kunststoff-Spezialverbunde of Delligsen was a highly specialised company for laminated safety glass (bullet-resistant glass). The laminates consist of flat glass panes and/or polycarbonate sheets, permanently laminated with transparent, elastic plastic interlayers – in addition to common thermoplastic PUR and PVB films, also thermosetting layer materials that retain ballistic strength even at higher operating temperatures. Partial areas of the laminates are bonded with in-house developed casting resin formulations; in combination with borosilicate glass this resulted in a patented invention of the company. The range of services included, among others, laminates with electric heating, electromagnetic shielding, laser protection, radiation protection as well as customised solutions with laminate thicknesses over 200 mm. Customers included Rheinmetall companies, the NATO Support Agency, Achleitner, BASF and Goodyear. At the end of 2018 the family-owned business closed after more than 30 years on the market.
- Site
- Delligsen
- Processes
- Manufacture of laminated safety glass (bullet-resistant glass), permanently laminated with, Development and manufacture of OPTIGARD® bullet-resistant glass special laminates, Development and manufacture of CONTRABAL® vision blocks, Development and manufacture of MULTIGARD® F and E laminates, Encapsulation of bullet-resistant glass panes in metal frames with multiple sealing, Manufacture of laminates with electric heating (12V to 230V), Manufacture of laminates with chemically toughened glass, Manufacture of laminates with electromagnetic shielding
- Materials
- Glass, Polycarbonate, Borosilicate glass, thermoplastic PUR film, PVB film, thermosetting layer materials, Casting resin, chemically toughened glasses
- Certificates
- ISO 9001:2015
- Founded
- 1987
- Industries
- Defence technology / military vehicles, Commercial vehicles with special armour, Mechanical engineering (personnel protection), Chemical industry (explosion protection), Hydraulic pressure applications, Museums / building protection
- 01
Development and design of the laminates
- 02
Laminating the glass panes/polycarbonate sheets with plastic interlayers
- 03
Bonding of partial areas with in-house developed casting resin formulations
- 04
Encapsulation of the panes in metal frames with multiple sealing
- 05
Non-destructive testing of every product
- 06
Destructive ballistic testing and light transmission measurement
- 07
Shipping
Materials and laminate structure
Glass
Flat and borosilicate glasses, partly chemically toughened, as the load-bearing component of the laminates.
Polycarbonate
Transparent sheets as the rear spall and fragment containment element of the laminated safety glass.
Thermoplastic PUR film
Elastic transparent interlayer for permanent lamination.
PVB film
Common interlayer for the permanent bonding of the glass layers.
Thermosetting layer materials
Retain the ballistic strength of the laminate even at higher operating temperatures.
Casting resin (in-house developed formulations)
Bonding of partial areas of the laminates and sealing during frame encapsulation.
Borosilicate glass
Highly transparent, lightweight and wear-resistant special glass, part of an earlier patented invention.
Metal frames
Housing for the bullet-resistant glass panes during encapsulation and multiple sealing.
Sites
Delligsen, Pestalozziweg 62
DEAdministration, sales, head office
- Materials
- Glass, polycarbonate, films, casting resin
Delligsen, Kaierder Str. 26
DEPlant / production (manufacturing and shipping)
- Materials
- Glass, polycarbonate, films, casting resin
- Light transmission measuring bench
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of laminated safety glass (bullet-resistant glass), permanently laminated withJoining | – | – | – | – | Glass, Polycarbonate, thermoplastic PUR films, PVB films, thermosetting layer materials, Casting resin, Borosilicate glass |
| Development and manufacture of OPTIGARD® bullet-resistant glass special laminatesJoining | – | – | – | – | Glass, Polycarbonate |
| Development and manufacture of CONTRABAL® vision blocksJoining | – | – | – | – | Glass, Polycarbonate |
| Development and manufacture of MULTIGARD® F and E laminatesJoining | – | – | – | – | Glass, Polycarbonate |
| Encapsulation of bullet-resistant glass panes in metal frames with multiple sealingJoining | – | – | – | – | Glass, Metal, Casting resin |
| Manufacture of laminates with electric heating (12V to 230V)Joining | – | – | – | – | Glass, Polycarbonate |
| Manufacture of laminates with chemically toughened glassJoining | – | – | – | – | chemically toughened glass |
| Manufacture of laminates with electromagnetic shieldingJoining | – | – | – | – | Glass, Polycarbonate |
| Manufacture of laminates with laser protectionJoining | – | – | – | – | Glass, Polycarbonate |
| Manufacture of laminates against high-energy radiation (e.g. X-rays)Joining | – | – | – | – | Glass |
| Manufacture of laminates with colourless, highly transparent glass (e.g. light transmittance TvAJoining | – | – | – | – | Glass |
| Manufacture of laminates with ball mountsJoining | – | – | – | – | Glass, Polycarbonate |
| Manufacture of laminates for customised solutions > 200mm thicknessJoining | – | 200 mm (laminate thickness can be | – | – | Glass, Polycarbonate |
| Non-destructive testing of every single productTesting | – | – | – | – | – |
| Destructive testing to demonstrate ballistic impact, shock and further dynamic andTesting | – | – | – | – | – |
| Light transmission measurement (light transmission measuring bench)Testing | – | – | – | – | – |
| Bonding of partial areas of the laminates with special, in-house developed casting resinJoining | – | – | – | – | Casting resin |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Light transmission measuring bench | – | – | – | – | Delligsen |
Additional services
Reference customers
Quality
Every product was non-destructively tested; in addition, a specified number underwent destructive ballistic testing to STANAG 4569 Level 1–4 in the test range −32 °C to +49 °C as well as light transmission measurements. Approvals existed, among others, with the German Armed Forces (Bundeswehr) and the Kraftfahrt-Bundesamt; the quality management system was certified to ISO 9001:2015 (DEKRA, 2016–2019).
| Evidence | Delligsen |
|---|---|
| ISO 9001:2015 |
History
- 1987
Company founded; beginning of the convincing, complaint-free quality for customers.
- 2016
ISO 9001:2015 certification by DEKRA (valid 09.09.2016 to 08.09.2019).
- 2018
Closure of the company at year-end after more than 30 years (Helmut, Ingrid and Ingolf Fricke).