IEC 61249的本部分给出了预浸料的性能要求，该预浸料主要用于按照IEC 61249-2-7制造符合IEC 62326-4的多层板时，与层压板连接的粘合片。这种材料也可用于粘合其他类型的层压板。 根据本标准，预浸料具有规定的可燃性（垂直燃烧试验）。完全固化预浸料的可燃性等级是通过使用作为聚合物结构组成部分的溴化阻燃剂实现的。按照供应商的说明层压后，玻璃化转变温度定义为至少150°C。

This part of IEC 61249 gives requirements for properties of prepreg that is mainly intended to be used as bonding sheets in connection with laminates according IEC 61249-2-7 when manufacturing multilayer boards in conformity with IEC 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 lamination according to the supplier's instructions, the glass transition temperature is defined to be 150 °C minimum.