With its state-of-the-art accredited laboratories and expert team, EUROLAB provides precise and fast testing services within the scope of IEC EN 61249-4-12 testing. This part of IEC EN 61249 gives requirements for prepreg properties intended for use as bonding sheets in conjunction with laminates according to IEC EN 62326-4-61249 when producing multilayer sheets in accordance with IEC EN 2-7.
This material can also be used to bond other types of laminate. According to this standard, Prepreg has a defined flammability (vertical combustion test). The degree of flammability on the fully cured prepreg is achieved through the use of brominated flame retardants, which are an integral part of the polymeric structure. According to the supplier's instructions, the glass transition temperature after lamination is defined as a minimum of 150°C.
In determining the presence of broken filaments, their size and frequency of occurrence are important for assessing acceptability, but the flow characteristic of the prepreg must also be considered. Acceptance conditions for broken filaments will be as agreed between the user and the supplier.
A series of plies with a minimum size of 300 mm × 300 mm of the prepreg tested should be glued together and cured according to the manufacturer's recommendations. The number of coats should be chosen so that a sample thickness of approximately (0,4 to 0,5) mm is obtained when measured with a micrometer.
Prepregs provided under this specification will qualify. A proficiency test should be carried out to demonstrate the manufacturer's ability to meet the requirements of this standard. The proficiency testing must be performed in a laboratory that complies with IEC laboratory requirements. The manufacturer will keep on file any data supporting that the materials meet this standard and will be available for review upon request.
EUROLAB assists manufacturers with IEC EN 61249-4-12 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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