Composite type heat insulator and method for producing the same
AssigneeImae Industry Co., Ltd.
InventorsNaoyuki Oya, Kimihiko Sugiura, Shuya Kawaoka, Kenji Imae, Yoshihiko Imae
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Abstract
Provided are a composite type heat insulator having an excellent heat insulating properties at high temperatures regardless of its thin body, and a method for producing the same. The composite type heat insulator comprises a first and a second cloths composed of silica fibers having a hydroxyl group; and a heat insulating layer sandwiched between the first and the second cloths. The heat insulating layer contains a silica aerogel and silica staple fibers having a fiber length of 0.5 to 5 mm. The heat insulating layer may optionally contain an infrared absorber and/or a film-forming inorganic binder.
Claims8
A composite heat insulator comprising
- a first cloth, a second cloth, and a heat insulating layer interposed between the first cloth and the second cloth, the first cloth being in direct contact with the heat insulating layer and the second cloth being in direct contact with the heat insulating layer,
- wherein the first and second cloths comprise a plurality of silica fibers having a hydroxyl group,
- wherein the heat insulating layer contains silica aerogel and a plurality of silica staple fibers each having a length in the range from 0.5 to 5 mm,
- wherein the amount ratio of the silica staple fiber to the silica aerogel (silica staple fiber:silica aerogel) is in the range from 8:2 to 5:5 in weight in the absence of a film-forming binder, and
- wherein the silica aerogel is held by the silica staple fibers.
Dependencies are inferred from the claim text.