HEAT-INSULATING AND SOUND ABSORBING MATERIAL FOR THE HEAT-INSULATING AND SOUND ABSORBING STRUCTURE OF A CAR BODY

• US 20110293892A1
• Filed: 12/22/2009
• Published: 12/01/2011
• Est. Priority Date: 12/22/2009
• Status: Abandoned Application

• Current Assignee: Nagoya Oilchemical Co., Ltd.
• Original Assignee: Nagoya Oilchemical Co., Ltd.
• Inventors: Fuji, Makoto, Ogawa, Masanori
• Application Number:
  US12/812,664
• Publication Number:
  US 20110293892A1
• Time in Patent Office: Days
• US Class Current: 428/172
• CPC Class Codes: B32B 2260/021 Fibrous or filamentary layer
• CPC Class Codes: B32B 2260/046 Synthetic resin
• CPC Class Codes: B32B 2262/0238 Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 2262/0246 Acrylic resin fibres
• CPC Class Codes: B32B 2262/0253 Polyolefin fibres
• CPC Class Codes: B32B 2262/0261 Polyamide fibres
• CPC Class Codes: B32B 2262/0276 Polyester fibres
• CPC Class Codes: B32B 2262/0292 Polyurethane fibres
• CPC Class Codes: B32B 2262/065 Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
• CPC Class Codes: B32B 2262/10 Inorganic fibres
• CPC Class Codes: B32B 2262/101 Glass fibres
• CPC Class Codes: B32B 2262/105 Ceramic fibres
• CPC Class Codes: B32B 2262/106 Carbon fibres, e.g. graphite fibres
• CPC Class Codes: B32B 2266/0228 Aromatic vinyl resin, e.g. styrenic (co)polymers
• CPC Class Codes: B32B 2266/025 Polyolefin
• CPC Class Codes: B32B 2266/0278 Polyurethane
• CPC Class Codes: B32B 2266/0285 Condensation resins of aldehydes, e.g. with phenols, ureas, melamines
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B32B 2307/304 Insulating
• CPC Class Codes: B32B 2307/546 Flexural strength; Flexion stiffness
• CPC Class Codes: B32B 2307/718 : Weight, e.g. weight per square meter
• CPC Class Codes: B32B 2307/7242 : Non-permeable
• CPC Class Codes: B32B 2307/732 : Dimensional properties
• CPC Class Codes: B32B 2605/08 : Cars
• CPC Class Codes: B32B 29/02 : next to a fibrous or filamentary layer
• CPC Class Codes: B32B 29/06 : specially treated, e.g. surfaced, parchmentised
• CPC Class Codes: B32B 5/022 : Non-woven fabric
• CPC Class Codes: B32B 5/18 : characterised by features of a layer of foamed material
• CPC Class Codes: B32B 5/26 : another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B60R 13/08 : Insulating elements, e.g. for sound insulation sound insulating linings for trains B61D17/185; drivers' cabs for load-carrying vehicles insulated against vibrations or noise B62D33/0604; thermal or acoustic insulation of engines F02B77/11; damping of sounds using compensation by electro-acoustic methods G10K11/178
• CPC Class Codes: D21H 27/40 : at least one of the sheets being non-planar, e.g. crêped crêping or corrugating paper B31F
• CPC Class Codes: G10K 11/168 : Plural layers of different materials, e.g. sandwiches
• CPC Class Codes: Y10T 428/24612 : Composite web or sheet

Abstract

[SUBJECT] The subject of the present invention is to provide a heat-insulating structure for a car, the heat-insulating structure having a light weight, and excellent heat-insulating and sound absorbing performance.

[METHOD FOR SOLVING THE SUBJECT] A heat-insulating and sound absorbing material is provided in the invention. The heat-insulating and sound absorbing material is characterized by an air-flow resistance controlling layer which lies between an air-permeable rigid layer and an air-permeable resilient layer, wherein the air-flow resistance controlling layer is a pulp fiber layer or a laminated layer of a pulp fiber layer and a nonwoven fabric having a mass per unit area in the range of between 10 and 50 g/m², a thickness in the range of between 0.08 and 0.30 mm, and an air-flow resistance in the range of between 0.07 and 3.00 kPa·s/m.

Claims

1. A heat insulating and sound absorbing material which comes into contact with a car body panel;

having an air-permeable rigid layer, and an air-permeable resilient layer, between which is an air-flow resistance controlling layer, consisting of a pulp fiber layer, or a laminated layer of said pulp fiber layer and nonwoven fabric, wherein said pulp fiber contains at least 90% by mass of porous pulp fiber which are beaten or refined to a degree of beating or refining in the range of between 350 and 650 ml as Canadian Standard Freeness (CSF) provided in JIS P8121-1995.4, each fiber having a large number of open surface micropores, said pulp fiber layer being a creped paper, the degree of creping being in the range of between 10 and 50%, and said pulp fiber layer having a mass per unit area in the range of between 10 and 50 g/m², a thickness in the range of between 0.08 and 0.30 mm, and a air-flow resistance in the range of between 0.07 and 3.00 kPa·

s/m.

3. A heat insulating and sound absorbing material in accordance with claim 1, wherein air-permeable decorative layer is further set on said air-permeable rigid layer.

4. A heat insulating and sound absorbing material in accordance with claim 1, wherein the surface of said air-permeable resilient layer which comes into contact with said car body panel is set to be flat and smooth.

5. A heat insulating and sound absorbing material in accordance with claim 1, wherein the surface of said air-permeable resilient layer which comes into contact with said car body panel is covered with a friction sheet.

6. A heat insulating and sound absorbing structure characterized by said heat insulating and sound absorbing material of claim 1, coming into contact with said car body panel.

2. A heat insulating and sound absorbing material, wherein said air-permeable porous rigid layer has a mass per unit area in the range of between 0.3 and 2.0 kg/m², a thickness in the range of between 3.0 and 10.0 mm, a flexual strength in the range of between 0.05 and 5.00N/25 mm, and an air-flow resistance in the range of between 0.20 and 3.00 kPa·

s/m.

7. A heat insulating and sound absorbing material in accordance with claim 2, wherein air-permeable decorative layer is further set on said air-permeable rigid layer.

8. A heat insulating and sound absorbing material in accordance with claim 2, wherein the surface of said air-permeable resilient layer which comes into contact with said car body panel is set to be flat and smooth.

9. A heat insulating and sound absorbing material in accordance with claim 2, wherein the surface of said air-permeable resilient layer which comes into contact with said car body panel is covered with a friction sheet.

10. A heat insulating and sound absorbing structure characterized by said heat insulating and absorbing material of claim 2, coming into contact with said car body panel.