EN 61249-4-2:2005

FOREWORD
1 Scope
2 Normative references
3 Materials and construction
  3.1 Reinforcement
  3.2 Resin system
4 Properties
  4.1 Properties related to the appearance of
      the prepreg
  4.2 Properties related to B-stage prepreg
  4.3 Properties related to prepreg after curing
5 Delivery form
  5.1 Rolls
  5.2 Sheets
  5.3 Cut panels
6 Quality assurance
  6.1 Quality system
  6.2 Responsibility for inspection
  6.3 Qualification inspection
  6.4 Quality conformance inspection
  6.5 Certificate of conformance
  6.6 Safety data sheet
7 Packaging and marking
8 Shelf life
9 Ordering information
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications

This part of EN 61249 gives requirements for properties of prepreg that is mainly intended to be used as bonding sheets in connection with laminates according to EN 61249-2-8 when manufacturing multilayer boards according to EN 62326-4. This material may be also used to bond other types of laminates. Prepreg according to this standard is of defined flammability (vertical burning test). The flammability rating on fully cured prepreg is achieved through the use of brominated fire retardants contained as an integral part of the polymeric structure. After curing of the prepreg according to the supplier's instructions, the glass transition temperature is defined as 150 °C minimum.