| 摘要 |
<p>PURPOSE: To provide a composite tube having a metal and a synthetic resin layered therein, wherein crack of the synthetic resin does not generate for a long time and adhesion and adhesion durability between the metal and the synthetic resin are excellent. CONSTITUTION: A composite tube is made of a metal having a silane graft polyolefin layered thereon through an adhesive polyethylene. In the composite tube, a melt flow rate of the adhesive polyethylene is 4.0g/10min. or lower, a tensile elastic modulus is 150kgf/cm<2> or lower, and a density (23 deg.C) is 0.930g/cm<3> or lower. Or, in the composite tube, the silane graft polyolefin i.s layered on the metal through an adhesive polypropylene, wherein a melt flow rate of the adhesive polypropylene is 4.0g/10min. or lower, a tensile elastic modulus is 150kgf/cm<2> or lower, and a density (23 deg.C) is 0.900g/cm<3> or lower.</p> |
