Heat-insulating and noise reducing duct

There is provided a heat-insulating and noise reducing duct constituted by reinforcing core 1, a thick felt layer 2, a foamed resin strip layer 3 and a resin-coating layer 4. The reinforcing core 1 is made of hard polyolefin resin material and wound spirally at predetermined intervals. The thick fel...

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Bibliographische Detailangaben
1. Verfasser:	FUKUI KOUKI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PIPES RANGES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING VENTILATING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	There is provided a heat-insulating and noise reducing duct constituted by reinforcing core 1, a thick felt layer 2, a foamed resin strip layer 3 and a resin-coating layer 4. The reinforcing core 1 is made of hard polyolefin resin material and wound spirally at predetermined intervals. The thick felt layer 2 is wound spirally on an outer circumferential surface of the reinforcing core so that adjacent side edge portions of the felt layer 2 are lapped over or brought into contact with each other, while the shape of the felt layer is retained by the reinforcing core 1. The foamed resin strip layer 3 made of polyolefin resin material and wound spirally on an outer circumferential surface of the felt layer 2 so that adjacent side edge portions of the foamed resin strip layer 3 are in abutment against or in tight contact with each other. The resin-coating layer 4 provided to cover an outer circumferential surface of the foamed resin strip layer 3. Accordingly, it is possible to provide a sound-absorbing and heat-insulating duct which is simple, not complicated, in structure, which can achieve both sound-absorbing and heat-insulating functions, which is suitable for use as an air-blow duct, and which is suitable for continuous production so that the duct can be mass-produced inexpensively without requiring any new equipment.