HIGH DENSITY POLYETHYLENE TUBE JOINT AND SEAL MATERIAL

• Main Authors: NAGATA JUNYA, HONBOU KYOUKO, TERAO YOSHINORI
• Format: Patent
• Language: English; Korean
• Published: 06.02.2020
• 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; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR POWER PLANT; PERFORMING OPERATIONS; PHYSICS; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

Provided are a high-density polyethylene tube, a joint, and a sealant, in which the deterioration due to external factors such as radiation is suppressed. The high-density polyethylene pipe (10), the joint, and the sealant comprise: an inner layer (1) mainly composed of high-density polyethylene having a density of 0.940 to 0.980 g/cm^3; a gas barrier film (2) covering the outer surface of the inner layer (1) and containing an ethylene-vinyl alcohol copolymer resin; an anti-fusion film (3) covering the outer surface of the gas barrier film (2) and comprising a resin having a melting point of 150°C or higher; and an outer layer (4) covering the outer surface of the anti-fusion film (3) and mainly composed of low-density polyethylene having a density of 0.910 to 0.930 g/cm^3. 방사선 등의 외적 인자에 의한 열화가 억제되는 고밀도 폴리에틸렌관, 조인트 및 시일재를 제공한다. 고밀도 폴리에틸렌관(10), 조인트 및 시일재는, 밀도가 0.940g/㎤ 이상 0.980g/㎤ 이하인 고밀도 폴리에틸렌을 주성분으로 하는 내층(1)과, 내층(1)의 외표면을 덮고, 에틸렌·비닐알코올 공중합 수지를 포함하는 가스 배리어 필름(2)과, 가스 배리어 필름(2)의 외표면을 덮고, 융점이 150℃ 이상인 수지를 포함하는 융착 방지 필름(3)과, 융착 방지 필름(3)의 외표면을 덮고, 밀도가 0.910g/㎤ 이상 0.930g/㎤ 이하인 저밀도 폴리에틸렌을 주성분으로 하는 외층(4)을 구비한다.