LAMINATED TUBE

• Main Authors: MIZUTANI KOJI, SAIKI KAZUHIRO, OKAHISA MASASHI, TAKIMOTO ISHI
• Format: Patent
• Language: English; Japanese
• Published: 26.06.2023
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

To provide a laminated tube excellent in strength and heat resistance, showing excellent inter-layer adhesion with no adhesive, and excellent in inter-layer adhesion after annealing.SOLUTION: A laminated tube comprises a tubular inner layer 11, and an outer layer 12 formed on an outer peripheral surface of the inner layer, where the inner layer 11 is a maleic anhydride-modified polypropylene resin layer containing organic particles with an average particle size of 0.1 to 10 μm, the outer layer 12 is a polyamide resin layer having an amine value of 15 to 100 mmol/kg, and the inner layer 11 side of an interface between the inner layer 11 and the outer layer 12 has a large number of convex ridges formed by the organic particles.SELECTED DRAWING: Figure 1 【課題】強度や耐熱性等に優れるとともに、接着剤レスで優れた層間接着性を示し、アニール後の層間接着性も良好である積層チューブを提供する。【解決手段】管状の内層１１と、その外周面に形成される外層１２とを備えた積層チューブであって、前記内層１１が、平均粒径０.１～１０μｍの有機粒子が含まれた無水マレイン酸変性ポリプロピレン樹脂層であり、前記外層１２が、アミン価１５～１００ｍｍｏｌ／ｋｇのポリアミド樹脂層であり、前記内層１１と外層１２との界面における内層１１側に、前記有機粒子による多数の凸状隆起を有する積層チューブとする。【選択図】図１