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Vacuum heat-insulating material and method for making same

A technology of vacuum heat insulation material and manufacturing method, which is applied in the direction of chemical instruments and methods, heat exchange equipment, household refrigeration equipment, etc., can solve the problems of large electricity and heat energy, increased environmental load, and large cost burden, so as to reduce costs, The effect of improving processing performance

Inactive Publication Date: 2007-03-07
HITACHI APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the vacuum heat insulating material of Patent Document 1, since the pulverized waste material is mixed as an intermediate layer between the laminated flaky inorganic fiber aggregates, the adhesion of the intermediate layer portion is weak, and the processing core When using materials, there is a problem that peeling occurs in the middle layer
In addition, such a vacuum insulation material requires a huge amount of electric and thermal energy when injecting the binder and heating and compressing the molding, which increases the load on the environment from the viewpoint of global warming.
[0005] On the other hand, there is no precedent for the reuse of waste materials from inorganic fiber aggregates without binders, but only as an option for either recovery into raw materials for recycling or as waste disposal
No matter what kind of treatment is used, because the inorganic fiber aggregates that do not contain binders have a small mass compared to a large apparent volume, the required recycling transportation costs and treatment costs are relatively high, and the cost heavy burden

Method used

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  • Vacuum heat-insulating material and method for making same
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  • Vacuum heat-insulating material and method for making same

Examples

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no. 1 example

[0042] A vacuum insulation material and a manufacturing method thereof according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5 .

[0043] First, the structure of the vacuum heat insulating material 20 of the present embodiment will be described with reference to FIG. 1 . FIG. 1 is a cross-sectional view of a vacuum insulation material 20 according to a first embodiment of the present invention.

[0044] The structure of this vacuum heat insulating material 20 includes a core material 10 and an outer covering material 1 having gas barrier properties. The core material 10 is accommodated in the outer covering material 1 and decompressed, and the peripheral portion thereof is sealed by fusion bonding. The vacuum heat insulating material 20 is formed of a flat rectangular plate.

[0045]The structure of the core material 10 includes: a new material 3 composed of an inorganic fiber aggregate not containing a binder, a waste materi...

no. 2 example

[0066] Next, a second embodiment of the present invention will be described with reference to FIG. 6 . Fig. 6 is a perspective view at the time of assembling the core material raw material 10A used in the vacuum heat insulating material 20 of the second embodiment of the present invention. The points of difference between the second embodiment and the first embodiment will be described below. For other aspects, since they are basically the same as the first embodiment, repeated descriptions will be omitted.

[0067] In the vacuum heat insulating material 20 of the second embodiment, waste materials 4 generated when cutting a binder-free glass wool laminate with an average fiber diameter of 4 μm into the size of a new material 3 are all used as core material raw materials. On 10A, the core material blank 10A made of 100% waste material is compressed and packaged with the inner cladding material 2 . In other words, the vacuum insulation material 20 is composed of three waste ma...

no. 3 example

[0070] Next, a third embodiment of the present invention will be described with reference to FIG. 8 . Fig. 8 is a cross-sectional view showing the combination of the core material blanks 10B used in the vacuum heat insulating material 20 according to the third embodiment of the present invention. The points of difference between the third embodiment and the first embodiment will be described below. For other aspects, since they are basically the same as the first embodiment, repeated descriptions will be omitted.

[0071] The vacuum heat insulating material 20 of the third embodiment uses a new material 3 composed of inorganic fiber aggregates not containing a binder and a core material composed of the waste material 4, and compresses and packs the core materials separately. Although the thermal conductivity of the vacuum insulation material 20 obtained in the third example is compared with that of the first example, when measured with the thermal conductivity measuring machin...

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Abstract

To provide a vacuum heat insulating material which can improve the handleability of a core material and reduce electrical / thermal energy during manufacture as well as the cost by reusing waste material which contains no binder. In the vacuum heat insulating material 20, the core material 10 having the waste material 4 composed of inorganic fiber polymer is received in an external envelope material 1 having gas barrier property. The core material 10 includes the waste material 4 composed of the inorganic fiber polymer not containing a binder and an internal envelope material 2 enclosing the waste material 4 therein. The external envelope material 1 containing the internal envelope material 2 therein is decompressed so as to be vacuum.

Description

technical field [0001] The present invention relates to a vacuum material and a manufacturing method thereof, and is particularly suitable for a vacuum heat insulating material using waste materials and a manufacturing method thereof. Background technique [0002] There is a proposal described in Patent Document 1 - Japanese Unexamined Patent Application Publication No. 2004-60794 regarding waste material utilization of a vacuum heat insulating material using a fibrous material. The vacuum heat insulating material in this patent document 1 is formed by compressing and molding inorganic fiber aggregates to form a molded body constituting the main component of the core material reinforced with a binder, and the end of the molded body is removed to make a desired size. The flake-shaped inorganic fiber aggregates, the waste material of the inorganic fiber aggregates remaining after taking out the core material from the molded body is pulverized, and the pulverized material is mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L59/06
CPCB32B17/02F16L59/04F16L59/065F25D23/065F25D2201/124F25D2201/14Y02B40/00
Inventor 新井佑志越后屋恒荒木邦成
Owner HITACHI APPLIANCES INC
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