JPS6237671A - vacuum insulation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a vacuum insulation material, and particularly to a vacuum insulation material suitable for improving insulation performance.

[Background of the invention]

Although flat plate vacuum insulation materials have a wide range of applications,
Due to the need for an internal spacer, there are no high-performance spacers suitable for vacuum insulation materials, and there are no examples of the development of high-performance spacers.

The spacer needs to satisfy the following requirements: high heat insulation performance, no vacuum deterioration, low cost, etc. Therefore, a known example of a conventional spacer is US Pat. No. 3,179,549.

Laminated glass wool is used as the spacer in the above US patent, and is sealed in a container made of iron and stainless steel to form a vacuum insulation material. This glass wool is made by incinerating the sizing agent required in the manufacturing process at a high temperature of 450°C before enclosing it, removing substances on the surface of the glass wool, leaving only the glass material, and preventing the generation of gas under high vacuum pressure.

In this way, a vacuum insulation material that combines a metal material container and glass wool can maintain a high vacuum because it is possible to perform vacuum baking at the time of sealing, but glass wool requires a high-temperature baking process before being sealed. This was disadvantageous for equipment and processes.

On the other hand, it may be possible to combine the outer container with a laminate sheet and glass wool, but the gas barrier properties of the laminate sheet are poor, and furthermore, when sealing is done, vacuum baking is not possible due to heat resistance, so the inner wall of the container and the surface of the glass wool A gas mainly composed of water (H2O1N2.
02, H2, etc.) have the problem of deteriorating the degree of vacuum.

Further, in order to solve this problem, it is possible to incorporate a large amount of getter to adsorb the gas, but this has the problem of high cost.

[Purpose of the invention]

An object of the present invention is to provide a vacuum heat insulating material that has improved heat insulating performance and can reduce the amount of getter material enclosed.

[Summary of the invention]

That is, a sizing agent containing a heat-absorbing substance is applied to the surface of glass fibers, and after drying, the sizing agent is sealed in an outer container, the inside is evacuated, and the generated moisture is adsorbed by the sizing agent. It is.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 1 to 7.

Figure 1 is a cross-sectional view of the vacuum insulation material, Figure 2 is a diagram showing the glass melting furnace and the state of application of the sizing agent, Figure 3 is a cross-sectional view of the glass fibers, and Figure 4 is a diagram showing the laminated state of the glass fibers. , FIG. 5 is an explanatory diagram of the glass wool mat, FIG. 6 is a perspective view of the vacuum insulation material, and FIG. 7 is an explanatory diagram of the needle. In the figure, 1 is a glass melting furnace, and 1a is a pushing nozzle for drawing out molten glass, and a plurality of these are provided at the lower part of the glass melting furnace 1. 2 is molten glass, and 2a is glass fiber extracted from the pushing nozzle 1a. 2b is a glass fiber coated with a sizing agent, 2C is a strand material made by bundling a plurality of glass fibers, 3 is a sizing material application device, 3a is a sizing material, and 4 is a strand material winding device.

5 is a flat vacuum heat insulating material, 6 is a high-density glass wool mat, and 6a is a glass fiber obtained by processing glass fibers 2e that are cut into small pieces and laminated in a direction perpendicular to the heat transfer direction. 6b is a penetration fiber that is sewn in with the hook 7a of the needle 7 to obtain high density. 8 is the outer container,
A laminate sheet 8a made of a metal foil or a composite of a metal film and a plastic film is a welded portion on the outer periphery. 9 is a getter that adsorbs various gases including water.

To construct the vacuum insulation material 5 with such members, first, glass raw materials (not shown) are introduced into the glass melting furnace 1, and the burner (
(not shown) to a high temperature of 1.600°C or higher,
The glass 2 is made into a liquid state. The glass 2 is extracted from this through a pushing nozzle 1a with an extremely small diameter, forcedly cooled to form a glass fiber 2a, and then coated with a sizing material 3 by a coating device 3.
Apply a. This sizing material is mixed with an adhesive, a moisture absorbent, etc., so the adhesive force aggregates a plurality of glass fibers, strengthens the tensile strength of the single strand fiber 2C, and sends it to the winding device 4. Wind it up.

This makes it possible to construct glass wool maturo that has a high density and is less susceptible to compression deformation due to vacuum pressure.

To construct such a glass wool mat, the strand fibers are cut into small dimensions, and then separated into individual glass fibers 6a using an open fiber (not shown). They are laminated randomly, and then a plurality of needles 7 with hooks 7a are driven in to increase the density by penetration fibers 6b in the heat transfer direction.

Next, the glass wool maturo is sealed together with the getter 9 in an outer container 8 having metal foil, a metal film, etc.

However, this glass wool maturo is sufficiently heated and dried before being enclosed to release the water adsorbed to the sizing agent 3a. Also, the getter 9 is similarly activated by heating and drying before being encapsulated.

Thereafter, the inside of the outer container 8 is evacuated, and the outer periphery 8a is welded to form the vacuum heat insulating material 5.

The vacuum insulation material 5 constructed as described above has a very large internal surface area (for example, glass wool with a diameter of 10 μm has a diameter of 27 μm).
It becomes 0d/Kf. ) Since the glass fiber 6a or the sizing agent 3a, which has a moisture-absorbing component and is in a dry state, is applied to the entire surface, even if the moisture adsorbed to the inner surface of the outer container 8 is desorbed, the outer container Even if moisture passes through the getter 8, it is adsorbed by a large amount of the sizing agent 3a and deterioration of the degree of vacuum can be prevented, so that the moisture adsorption component of the getter 9 becomes unnecessary or the required amount becomes minute.

In addition, glass wool Matsutoro does not require a soaking process in which it is burned by high temperature baking before incorporating the sizing agent 3a, so processing equipment, processing time, heating energy, etc. are omitted, and it is extremely effective industrially. It is.

〔Effect of the invention〕

According to the present invention, by applying a sizing material to glass fibers, the heat insulation performance is improved and the amount of getter material enclosed can be reduced.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the vacuum insulation material of the present invention, Fig. 2 is a view showing the glass melting furnace and the application state of the sizing agent, Fig. 3 is an enlarged cross-sectional view of the glass fiber, and Fig. 4 is 5 is an explanatory diagram of a glass wool mat, FIG. 6 is a perspective view of a vacuum insulation material, and FIG. 7 is an explanatory diagram of a needle. DESCRIPTION OF SYMBOLS 1... Glass melting furnace, 1a... Pushing nozzle, 2... Molten glass, 2a... Glass fiber, 2b...
... Glass fiber with sizing allocation, 2C ... Strand material, 3 ... Sizing agent coating device, 3a ... Sizing agent, 4 ... Winding device, 5 ... Vacuum insulation material,
6...Glass seal mat, 6a...Glass fiber,
6b... Penetration fiber, 7... Needle, 7a.
...Hook, 8...Outer container, 8a...Welded part, 9.
...Getter. 1st figure Stem 2 days stem 3 mouths ¥-4 mouths ¥-5 squares

Claims (1)

[Claims] In a vacuum insulation material with a spacer stored inside it,
A vacuum heat insulating material characterized in that the spacer is made of glass fiber and a heat-absorbing substance coated on the surface of the glass fiber.