COVERING MATERIAL FOR OPTICAL FIBER CABLES, AND OPTICAL FIBER CABLE

摘要

The purpose of the present invention is to suppress shrinkage of a covering material for optical fiber cables, while ensuring a certain level of flexibility of the covering material. This covering material for optical fiber cables contains 10% by mass or more of a polypropylene elastomer, and preferably does not contain a paraffin. It is also preferable that the covering material for optical fiber cables is composed of 35-55% by mass of a polymer containing a polypropylene elastomer and the balance made up of an additive. This covering material for optical fiber cables is used as a sheath that covers the outer circumference of an optical fiber.