Texturing Lacquer Adhesion - Autoflex EB
1. PRODUCT DESCRIPTION
All Autoflex EB grades have been designed to accept over-printing with MacDermid Autotype’s Fototex range of Nitrogen/UV cure and standard UV cure texturing varnishes.
The Autoflex EB hard coated surface is extremely inert and chemically resistant. It is normally impossible to achieve good adhesion onto this type of surface. In order to overcome this challenge, MacDermid Autotype developed REACTIVE SURFACE TECHNOLOGY.
The Autoflex EB surface is modified using unique chemistry. The surface provides highly reactive key sites to which the Fototex products can bind. The strong chemical bonds formed between the Autoflex LH and cured Fototex texture provides 100% permanent adhesion.
2. STABILITY OF REACTIVE SITES
The Autoflex EB key sites are so highly reactive that exposure to air and even low levels of light cause a slow loss of Fototex receptivity. The normal packaging of the material prevents this deterioration.
When removed from the packaging and exposed to a normal print room atmosphere for up to 48 hours subsequent texturing will give a 100% adhesion result. However, if left for longer than this prior to printing, the Autoflex EB surface may become completely inert. All Fototex receptivity will then be lost.
Figure 1 shows how the receptivity of Autoflex EB changes with time. This data is based upon laboratory results. The actual rate of deterioration may vary according to the storage conditions used. The user must therefore perform tests to establish the useful life of the product under their own particular operating conditions.
3. PRINTING RECOMMENDATIONS
In order to achieve the best possible adhesion results, Fototex should be applied within 48 hours, preferably within 24 hours, of removing the Autoflex EB from its packaging. When printing multi-coloured graphic inks, the Fototex should be applied as early in the process as possible preferably at the first or second printing operation. If it is necessary to store Autoflex EB for longer periods between operations before applying Fototex the sheets should be stacked and wrapped, in this way the shelf life is considerably extended.
ONCE THE FOTOTEX HAS BEEN PRINTED AND CURED ONTO AUTOFLEX EB THE ADHESIVE BOND IS PERMANENT AND WILL NOT DETERIORATE UNDER NORMAL OPERATING CONDITIONS.
These guidelines are valid for a single texture operation only. Please contact MacDermid Autotype for details on multi-texture printing.
Autoflex EB is also compatible with a wide range of commercially available texturing varnishes. For any particular varnish the user must perform tests to establish compatibility with Autoflex EB under their own particular operating conditions.
Please note: Autoflex EB is not compatible with either Windotex Gloss or Windotex Antiglare. Windows printed onto Autoflex EB are likely to suffer from poor adhesion