JP2526778Y2 - Inorganic fiber insulation - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an improvement in inorganic fiber insulation.

[0002]

2. Description of the Related Art Conventionally, as an inorganic fiber heat insulator used as a lining material of an industrial heating furnace, an inorganic fiber heat insulator composed of a laminate formed by laminating inorganic fiber blankets, and an inorganic fiber heat insulator composed of a laminate obtained by laminating an inorganic fiber blanket, There has been proposed an inorganic fiber heat insulator in which a metal support is disposed on an end surface of a body (Japanese Patent Application Laid-Open No. H13-13789).

In order to suppress the generation of dust,
A blanket has been proposed in which a surface active agent is sprayed on a ceramic fiber to perform needle punching (Japanese Patent Laid-Open No. 51-82306).

[0004]

[Problems to be Solved by the Invention] However, the conventional inorganic fiber heat insulator is included in the inorganic fiber blanket when subjected to a strong impact when it is applied as a furnace wall heat insulator or during handling such as transportation. However, there is a disadvantage that the fine fibers and particles that are formed are scattered outside as dust and deteriorate the surrounding environment.

[0005] In addition, in an inorganic fiber blanket that has been needle-punched by spraying a surfactant, the fiber is likely to slip due to the action of the surfactant. Therefore, in order to process the inorganic fiber blanket and use it as a laminate, the strength and the shape stability are still insufficient.

An object of the present invention is to provide an inorganic fiber heat insulator having excellent dustproof properties and sufficient strength and shape stability.

[0007]

Means for Solving the Problems The present invention comprises a laminated body formed by laminating inorganic fiber blankets and sewing them with a thread. The body is impregnated with a liquid dust-proofing agent, and the liquid dust-proofing agent is a non-volatile liquid that easily spreads on the surface when it adheres to the fiber, and contains oils, surfactants, and fatty acid amino salts. A gist is an inorganic fiber heat insulator characterized by being a liquid.

[0008] Further, it is preferable that the laminate constituting the inorganic fiber heat insulator is heat-shrink-wrapped with a heat-shrinkable film.

[0009]

In the inorganic fiber heat insulator according to the present invention, since the laminate is impregnated with a special liquid dust-proofing agent, the liquid dust-proofing agent covers the fiber surface and traps loose fibers or particles. Therefore, when using an inorganic fiber heat insulator as a lining material of an industrial heating furnace, or when handling such as transportation, even if a strong impact is received, fine fibers or particles contained in the inorganic fiber blanket may be damaged. The dust does not fly out of the inorganic fiber heat insulator.

Further, the strength and shape stability of the inorganic fiber heat insulator are increased by suturing the laminate with a thread.

Further, when the laminate is heat-shrink-wrapped with a heat-shrinkable film, the laminate can be easily packaged by a special machine. As a result, the strength and shape stability of the laminate can be further increased by heat shrinkage of the film.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to FIGS.

The inorganic fiber blanket is made of a polycrystalline fiber such as a mullite fiber or an alumina fiber, a ceramic fiber, or a mixture of the polycrystalline fiber and the ceramic fiber. Such inorganic fiber blankets are laminated on each other, sewed with a thread 5 by a known method, cut into a predetermined size, and laminated as shown in FIG.
And If necessary, a known metal support 2 for attachment may be attached to the end face of the laminate 4, that is, the cut surface of the inorganic fiber blanket. Furthermore, if the laminate 4 is heat-shrink wrapped with a heat-shrinkable film 3, for example, polyvinyl chloride, polypropylene, or polystyrene, the strength and shape stability of the laminate will be even more perfect.

In this invention, the inorganic fiber blanket is impregnated with a liquid dustproofing agent to perform a dustproofing treatment.

The liquid dustproofing agent is a non-volatile liquid which easily wets the fiber and spreads on the surface when it adheres thereto, and includes various known oily agents such as silicone oil and kerosene, surface active agents, and fatty acid amino salts. It is a liquid.

The liquid dustproofing agent is used as it is or dissolved in water to an appropriate concentration, and sprayed on the fiber being produced to prepare an inorganic fiber blanket impregnated with the liquid dustproofing agent. After that, the inorganic fiber blankets are laminated together,
After suturing with a thread 5 according to a known method, it is cut into a predetermined size to form a laminate 4 as shown in FIG.

Alternatively, an inorganic fiber blanket not impregnated with the liquid dustproofing agent is formed on the laminate 4, and then the liquid dustproofing agent is sprayed or sprayed on the surface of the laminate 4 to impregnate the inorganic fiber blanket of the laminate 4. You may let it.
At this time, the sprayed or sprayed liquid dustproof agent adheres to the fiber surface, spreads, and penetrates into the inside of the laminate 4.

Example 1 As shown in FIG. 1, a ceramic fiber blanket was laminated and sewn with a thread in the laminating direction by an industrial sewing machine. At this time, the total thickness of the laminated ceramic fiber blanket was 300 mm. This is length 300
mm and a width of 50 mm were cut in the laminating direction of the ceramic fiber blanket to form one laminate.
Thereafter, a surfactant was sprayed on the surface of the laminate. After being left for a while, the laminate was cut, and it was confirmed that the surfactant had penetrated to the inside of the laminate.

EXAMPLE 2 A ceramic mat was formed by blowing a jet of air onto the melt to produce ceramic fibers, while simultaneously spraying a surfactant to form a fiber mat, which was needle-punched to form a ceramic fiber blanket. made. This ceramic fiber blanket was laminated and sewn with a thread in the laminating direction using an industrial sewing machine. At this time, the thickness of the ceramic fiber blanket was 300 mm. This is length 200
mm and a width of 150 mm were cut in the laminating direction of the ceramic fiber blanket to form a laminate.
A support was attached to one side of the cut surface of the laminate. The support is preferably a metal fixture, and when mounted, the tip is bent and embedded in the laminate to firmly hold the laminate. Using a heat shrink wrapping machine, this laminate was heat shrink wrapped and covered with a polypropylene film.
The shape was as shown in FIG.

[0020]

As is apparent from the above description, the inorganic fiber heat insulator subjected to the dust-proofing process according to the present invention turns fine fibers or particles contained in the inorganic fiber blanket into dust even when subjected to a strong impact. It does not fly outside. Therefore, the working environment can be greatly improved during construction or handling such as transportation. In addition , since the strength and shape stability of the inorganic fiber heat insulator are increased, handling is easy and work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of an inorganic fiber heat insulator for a furnace wall of an industrial heating furnace subjected to a dust-proof treatment according to the present invention.

FIG. 2 is a perspective view showing a second embodiment of an inorganic fiber heat insulator for a furnace wall of an industrial heating furnace subjected to a dust-proof treatment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inorganic fiber blanket 2 Support 3 Heat-shrinkable film 4 Laminate 5 Suture thread

Claims (2)

(57) [Scope of request for utility model registration] 1. An inorganic fiber heat insulator used as a furnace wall heat insulating material of an industrial heating furnace, comprising a laminate formed by laminating inorganic fiber blankets and sewing with a thread, wherein the laminate is impregnated with a liquid dustproofing agent. The liquid dustproofing agent is a non-volatile liquid that easily wets the fiber and spreads on the surface when it adheres, and is a liquid containing an oil agent, a surfactant, and an amino salt of a fatty acid. Inorganic fiber insulation. 2. The inorganic fiber heat insulator according to claim 1, wherein the laminate is heat-shrink wrapped with a heat-shrinkable film.