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ePaper created 2015-02-11, 12:44:50 | version 1.34.01
2 |20132 |2013 P|11Progress Dr. Staudt, can you give us a general idea of the situation on the window market? German market as example. The growth in production for the year 2012 counting completed window units amounted to 2.6 percent. The total annual production volume of the industry was 13.2 million window units. About 57.4 percent were plastic frames, of which about 30 percent were foil-laminated – and this percentage is increasing1 . matter what the weather. This is a tough challenge for an adhesive product. - rally expected to last for 25 to 40 years. Above all, win- dows located in house walls where they are exposed to heavy weather impacts have to withstand serious - ods, direct sun exposure, or alternating temperatures. The material compound must also prove resistant against differences in temperatures between the in- side and the outside of the window – these may vary so when the temperature rises, the adhesive system has to be able to compensate for the expansion of the PVC frame and the foils which is also usually based on PVC, without loss of bond strength. Windows are – also internationally – evaluated according to RAL standards and quality assurance. What role does the adhesive play in this? - terial compound is a quality criterion which is very crucial, and has lately been included in the quality as- hydrolysis resistance of the adhesive systems used according to RAL standards. They consist of a combi- nation of primer and reactive PUR hot melt adhesive. simulating the ageing process of the total compound. Key word “primer” – what‘s the function of the primer in this “successful duo”? washing primer. It cleans the surface of the PVC pro- development of adhesive properties. It also creates a favourable surface polarity which improves the physi- known primers that are low in VOCs, Jowat has recent- basis free of any hazard labelling requirements. Both products reach practically equal performance results in comparison to conventional solvent based primers. - mages and a clearly reduced impact on humans and the environment. Now we come to the adhesive … joined in the production process. First of all, the foil comes off the reel and is coated with the adhesive in a slot nozzle application process, which should result would later on have a detrimental impact on the quality of the windowframe surface. The foil is then pressed or were stored under contolled temperature conditions, giving the materials the ideal properties necessary for wrapping. Appropriate temperatures are very important in order to allow the adhesive to wet the foil completely and evenly. 1 Press release by the VFF 04/13 Industry Wood | Furniture | ConstructionW