JPS6131798A - Heat-insulating material pack - 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 the Invention The present invention relates to a heat insulating material bank used in refrigerators, refrigerators, refrigerators, etc., and a method for manufacturing the same.

The configuration of the conventional example and its problems The configuration of the conventional example will be explained with reference to FIGS. 6 to 8. 1
is an insulating material pack, and powder such as dry perlite 2
Outer bag 3 made of plastic laminated film, etc.
It is formed by filling.

To explain the manufacturing process of this insulation pack 1, the outer bag 3 is formed into a cylindrical shape by heat-sealing two sides, and the remaining two sides have openings 4 for powder filling, heat-sealing 6, and vacuum evacuation. An opening 6 and a heat seal 7 are formed respectively. In this outer bag 3, a filter 8 made of breathable non-woven fabric or the like is heat-sealed inside the two openings 4 and 6, leaving a heat-sealed portion 7 near the vacuum opening 6. It is installed.

After filling the outer bag 3 with the dried powder 2 through the powder filling opening 4, the heat sealing 5 is sealed by heat sealing. After forming the outer bag 3 filled with the powder 2 into a flat surface using the filter 8 so that the powder 2 does not leak, the inside is placed in a vacuum packaging machine through the opening 6 for vacuum evacuation. I
After the pressure was reduced to below Torr, the opening 6 for evacuation was heat-sealed.

However, in the above conventional example, the inside of the outer bag 3 is evacuated from the vacuum opening 6 through the filter 8 and depressurized. Since the powder is exhausted through the space between the powders 2, the exhaust resistance is large and the exhaust time is long.

As a countermeasure, there is a method of burying a pipe made of iron, aluminum, etc. in the powder 2 and using it as an exhaust passage.
Since the gas may seep into the pipe when vacuuming, and the vacuum can only be drawn from one side of the cut pipe, it cannot function as a sufficient exhaust passage./ζ Moreover, since the heat transfer effect of the pipe in the powder 2 is large, it has the disadvantage that the heat insulating performance as a heat insulating material pack is lowered.

OBJECTS OF THE INVENTION The present invention eliminates the drawbacks of the above-mentioned conventional examples, and aims to shorten the evacuation time without reducing the heat insulation performance of the heat insulation pack.

Structure of the Invention In order to achieve the above object, the present invention provides a plastic laminate which has air permeability on the inner surface and is equipped with a bag-shaped filter that can prevent powder from scattering outside the outer bag. An outer bag made of film or the like, and by attaching insulating fibers such as glass wool to the inside of the sides of the two openings of the outer bag, the fibers can be evacuated to function as an exhaust passage. This can save time.

DESCRIPTION OF THE EMBODIMENTS Below, the configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 6. Structures that are the same as those of the prior art will be designated by the same numbers and detailed explanation thereof will be omitted.

In the figure, reference numeral 9 denotes a vacuum insulation material puncture, which is formed by filling an outer bag 10 made of a plastic laminate film or the like with powder 2 such as dried perlite.

Next, the manufacturing process of this vacuum insulation pack 9 will be explained. The outer bag 10 is formed into a cylindrical shape by heat-sealing two sides, and has an opening 11 for powder filling and a heat-sealing 12 on the remaining two sides.
An opening 13 for evacuation and a heat seal 14 are formed, respectively.

This outer bag 10 has a filter 8 made of breathable non-woven fabric or the like inwardly from the two openings 11 and 13 by heat sealing, leaving a heat sealing layer 14 near the vacuum opening 13. It is installed. In addition, inside the sides 15 and 16 of the opening 11.13 of the outer bag 10, a fiber 17 having heat insulating and breathable properties such as glass wool or the like is placed on the side 15.16 with a 15° side edge. is fixed inward.

After filling the outer bag 10 with powder 2 such as dried perlite through the powder filling opening 11, the heat sealing 12 is sealed by heat sealing. Then, after forming the outer bag 10 filled with the powder 2 so as not to leak through the filter 8 into a flat plate shape, the internal pressure is reduced to 0.1 TOrr or less in the vacuum packaging machine 18 through the vacuum opening 13. A heat sealing machine 19 seals the heat sealing 14 near the vacuum opening 13 to form a vacuum heat insulating material pack 9.

Therefore, in the past, during the evacuation process, all the air in the outer bag 10 passed through the powder 2 and was exhausted from the filter 8, but rather than passing through the powder 2, the air in the outer bag 10 was discharged from the sides 15 and 16 of the evacuation opening 13. The air passes through the fibers 17 because the inwardly heat-sealed fibers 17 having heat insulating properties, such as glass wool, have a higher void ratio than the powder 2, and the exhaust resistance is lower when the air passes through the fibers 17. Since this plays the role of an exhaust passage, the overall exhaust resistance is reduced, the exhaust time can be significantly shortened, and work efficiency can be improved. Since the exhaust passage inside the folded outer bag 10 has a heat insulating property, the heat insulating property as the heat insulating material hole 9 does not deteriorate.

Effects of the Invention The present invention has the above-described configuration, and provides the following effects.

(a) During the evacuation process, fibers with insulating properties such as glass wool, which are bonded to the inside of the sides of the evacuation opening by heat sealing, have a higher void ratio than powder, and the fibers that pass through the evacuation opening have a higher void ratio than powder. However, since the exhaust resistance is small, the air passes through the fibers, which act as an exhaust passage, so the exhaust resistance is reduced as a whole, and the exhaust time can be significantly shortened and work efficiency can be improved.

It has the advantage that the heat insulation properties as a heat material bag do not deteriorate.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a heat-insulating puncture showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same, Fig. 3 is a longitudinal sectional view of an outer bag provided with a filter, and Fig. 4 is a longitudinal sectional view of the outer bag. A perspective view when installing a filter and fibers with heat insulating properties such as glass wool,
Figure 6 is a vertical cross-sectional view of the outer bag being evacuated by a vacuum packaging machine, Figure 6 is a vertical cross-sectional view of a conventional punctured insulation material, Figure 7 is a cross-sectional view of the same, and Figure 8 is a filter installed. It is a longitudinal cross-sectional view of an outer bag. 2...Powder, 8...Filter, 9...River insulation pack, 10...Outer bag, 17...
··fiber. Name of agent: Patent attorney Toshio Nakao and 1 other person3
B Fig. 4 Fig. 8 Fig. 2 ε

Claims (1)

[Claims] It has a powder and an outer bag that houses the powder and decompresses the inside, and the outer bag has an opening for vacuuming, a heat sealing area for sealing, and an opening for filling the powder and a heat sealing area for sealing. A bag-shaped filter having air permeability is provided on the inner surface of the outer bag and is located inside the two heat-sealing areas, and the filter and powder are filled inside the sides of the two openings. A heat insulating material pack that has fibers with heat insulating and breathable properties on the inside of the heat-sealed opening.