IEC 61249-2-26:2005

FOREWORD
1 Scope
2 Normative references
3 Materials and construction
   3.1 Resin system
   3.2 Reinforcement
   3.3 Metal foil
4 Internal marking
5 Electrical Properties
6 Non-Electrical properties of the copper-clad laminate
   6.1 Appearance of the copper-clad sheet
   6.2 Appearance of the unclad face
   6.3 Laminate Thickness
   6.4 Bow and twist
   6.5 Properties related to the copper foil bond
   6.6 Punching and machining
   6.7 Dimensional stability
   6.8 Sheet sizes
   6.9 Cut panels
7 Non-electrical properties of the base material after
   complete removal of the copper foil
   7.1 Appearance of the dielectric base material
   7.2 Flexural Strength
   7.3 Flammability
   7.4 Water absorption
   7.5 Measling
   7.6 Glass transition temperature and cure factor
8 Quality assurance
   8.1 Quality system
   8.2 Responsibility for inspection
   8.3 Qualification inspection
   8.4 Quality conformance inspection
   8.5 Certificate of conformance
9 Packaging and marking
10 Ordering information
Annex A (informative) Engineering information
Annex B (informative) Common laminate constructions
Annex C (informative) Guideline for qualification and
                      conformance inspection

This part of IEC 61249 gives requirements for properties of non-halogenated epoxide non-woven/woven reinforced E-glass laminated sheets of defined flammability (vertical burning test), copper-clad in thicknesses of 0,80 mm up to 1,60 mm. The flammability rating is achieved through the use of non-halogenated inorganic and/or organic compounds acting as fire retardants. These fire retardants are contained as part of polymeric structure or in addition to it. The glass transition temperature is defined to be 95 °C minimum.