2. Application technical notes
The splinter-hindering characteristic of the product makes it most suitable for exposed applications such as guardrails or skylights, canopies etc. The statutory code and standard requirements of using such glass are usually specific to the country and location of the installation. The purchaser must ensure that all such requirements are fulfilled and specified before buying.
Colour stability
Standard colours
All coloured interlayers have been subject to a 3 year „Arizona“ test. This simulates an approximate use of 10 years in middle European climate. Following this test, all interlayers showed only minimal colour nuance differences. A DELTA E1) value < 1,6 was not exceeded. In practice it is expected that these minor colour nuance differences are not noticeable. Replacement units can have a slight colour difference to existing units. Comments regarding the suitability for external glazing can be found in the table „colour stability and applications for STADIP COLOR“.
1) Measurement to Hunter Color Space Illumination C
Special colours
The suitability of special colours for external glazing is to be clarified on a project-specific basis. Combinations with light yellow tones should be avoided in sensitive applications because of high DELTA E1) deviations of 4,0 to 5,0.
1) Measurement to Hunter Color Space Illumination C
Colour rendition dependent on the side of viewing
The colour is normally determined by multiple layers of coloured film.
Standard coloures with asymmetrical interlayer packet will have different colour renditions from either side. All STADIP COLOR Glasses have the outside marked.
Breakage risks through thermal behaviour in external applications
Because of the heat-energy absorption of the interlayers, a higher thermal load is to be expected. We recommend that external applications of STADIP COLOR are using edges that fine ground.
Combinations with insulating glass are to be thermally analysed on a project-specific basis to determine whether the temperature difference ∆T requires single sheets in Fully Tempered or Heat Strengthened.
Ball impact resistance
For particular requirements in sports halls and arenas STADIP can fulfill the requirements of DIN 18032 Part 3.
Moisture effects in laminated safety glass
The PvB-films used are hygroscopic and extremely dry. At the edges of a laminated glass unit is exposed to air. Air humidity, standing water or droplet accumulation at the edges of the laminated glass create a high moisture content. Moisture can therefore permeate the interlayer and will tend to increase moisture ingress. This can lead to optical fogging or de-lamination after longer periods but does not result in performance as this situation will remain in the edge area.
It is therefore important to ensure that the installation conditions do not allow for standing water. As the above mentioned moisture conditions may also occur at the edge of laminated glass resulting from sealants or shims, the compatibility of materials becomes of importance. Differing substances which come into direct or indirect contact with the PvB must not have any chemical or physical reaction (e.g. seeping oils). The sealants, glazing packers, tapes etc. must be checked for compatibility with the PvB.
Laminated Safety Glass with exposed edges
Protecting the edges against the above mentioned effects is currently not possible. It is often suggested that a thin coating of silicone will protect the edge area of the film from outside. We advise in this regard that sealants such as silicone do not adhere to the PvB and on sit on the material. These sealants are also not moisture resistant i.e. moisture in the form of vapour can still penetrate the system even with such „preventive“ measures and react with the interlayer.
UV-Transmission
PvB-films have only a minimal UV-Transmission. Special UV absorbing films can reduce UV-Transmission to < 1%. The use of glazing with such an interlayer is not complete protection against fading as it is not only the UV-part of the spectrum of 280 – 380 nm which causes fading but also the visible light part of the solar spectrum. We are unable to accept any responsibility for damage which occurs to objects as a result of sunlight.
[PDF] Tolerances
[PDF] General Glazing Guidelines
[PDF] Cleaning and Maintenance recommendations
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