Preform for forming containers with light barrier effect by stretch blow molding

摘要

The preform comprises a single layer or several layers, wherein the single layer or an outer layer is made of a polymer material selected from high density polyethylene (PEHD) and polypropylene (PP), with titanium oxide TiO 2 in a proportion of 2% to 8% by weight for providing a light barrier effect by reflection to a container obtained by stretch blow molding of said preform, and with a colorant with infrared ray absorbing capacity, such as carbon black, in a proportion of 0.0005% to 3% by weight to favor heating the preform by infrared radiation in a heating and stretch blow molding process of the preform.