Multilayer tube

Abstract

Provided is a multilayer tube with excellent strength, heat resistance, and the like, further exhibiting excellent interlayer adhesion without an adhesive, as well as good interlayer adhesion after annealing. The multilayer tube has a tubular inner layer and an outer layer formed on an outer peripheral surface thereof. The inner layer is a maleic anhydride-modified polypropylene resin layer which contains organic particles having an average particle size of 0.1-10 μm. The outer layer is a polyamide resin layer with an amine value of 15-100 mmol/kg. The multilayer tube includes numerous convex protrusions caused by the organic particles on a side of the inner layer at an interface between the inner layer and the outer layer.

Dependencies are inferred from the claim text.