OUTER PACKING MATERIAL FOR VACUUM INSULATION MATERIAL, VACUUM
INSULATION MATERIAL, AND ARTICLE PROVIDED WITH VACUUM INSULATION
MATERIAL
Technical Field
[0001]
The present disclosure relates to an outer packing material
for vacuum insulation material capable of forming a vacuum
insulation material, a vacuum insulation material, and an article
provided with a vacuum insulation material.
Background Art
[0002]
In recent years, vacuum insulation materials have been
used for the purpose of energy conservation of articles. A vacuum
insulation material is a member in which a core material is
arranged inside the bag body of an outer packing material, and
inside the bag body is kept in a vacuum state of which pressure
is lower than the atmospheric pressure; thus, heat convection
inside is suppressed to exhibit an excellent heat insulation
performance. Incidentally, the outer packing material used for
the vacuum insulation material is referred to as an outer packing
material for vacuum insulation material, or simply the outer
packing material while explained.
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[0003]
When a vacuum insulation material is exposed to high
temperature, there is a problem that the insulation performance
decreases over time, even if the vacuum insulation material has
a low initial thermal conductivity. To such the problem, for
example, Patent Document 1 discloses an outer packing material
for vacuum insulation material, wherein the dimensional change
ratio of the outer packing material for vacuum insulation
material, when the temperature of the atmosphere is changed from
20°C to 145°C, after maintaining the temperature of the
atmosphere at 145°C for one hour, and changed the temperature
of the atmosphere from 145°C to 20°C, based on the dimension
of the outer packing material for vacuum insulation material
when the temperature of the atmosphere is 20°C, is 1% or less.
As described above, Patent Document 1 discloses that, since the
dimensional change ratio of the outer packing material for vacuum
insulation material is in the specific range, the gas barrier
performance of the outer packing material can be maintained high
even at high temperature so that it is able to form a vacuum
insulation material that is able to maintain a thermal insulating
property for a long term even at high temperature. Meanwhile,
the Patent Document 1 does not clarify disclose guidelines for
materials with low dimensional change ratio.
[0004]
In order to make the dimensional change ratio of the outer
packing material for vacuum insulation material at high
temperature environment low, so as to form a vacuum insulation
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material that is able to maintain a thermal insulating property
for a long term even at high temperature, Patent Document 2
discloses an outer packing material for vacuum insulation
material comprising at least a thermally weldable film and a
gas barrier film, wherein the thermally weldable film includes
an amorphous copolymerization polyester resin.
Citation List
Patent Documents
[0005]
Patent Document 1: Japanese Patent Application Laid-Open
(JP-A) No. 2017-180822
Patent Document 2: JP-A No. 2017-210986
Summary
Technical Problem
[0006]
The present disclosure has been made in view of the above
circumstances, and a main object of the present disclosure is
to provide an outer packing material for vacuum insulation
material capable of forming a vacuum insulation material that
is able to maintain a thermal insulating property for a long
term even at high temperature.
Solution to Problem
[0007]
The present disclosure provides an outer packing material
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for vacuum insulation material comprising a film including a
substrate including polyethylene terephthalate, and an
inorganic layer including inorganic material that is disposed
on at least one surface of the substrate, wherein a lamellar
period of the substrate is 13.0 nm or more and 16.0 nm or less.
[0008]
Also, the present disclosure provides a vacuum insulation
material comprising a core material, and an outer packing
material enclosing the core material; wherein the outer packing
material is the outer packing material for vacuum insulation
material described above.
[0009]
Also, the present disclosure provides an article provided
with vacuum insulation material comprising an article including
a thermal insulation region, and a vacuum insulation material,
wherein the vacuum insulation material includes a core material,
and an outer packing material enclosing the core material; and
the outer packing material is the outer packing material for
vacuum insulation material described above.
Advantageous Effects
[0010]
According to the present disclosure, an outer packing
material for vacuum insulation material capable of forming a
vacuum insulation material that is able to maintain a thermal
insulating property for a long term even at high temperature,
may be provided.
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Brief Description of Drawings
[0011]
[FIG. 1] is a schematic cross-sectional view illustrating
an example of an outer packing material for vacuum insulation
material in the present disclosure.
[FIG. 2] is a schematic view of the stacked structure of
the crystal portion and amorphous portion of a crystalline
polymer.
[FIG. 3] is a graph showing a relationship between the
lamellar period and the dimensional change of a PET substrate.
[FIGS. 4] are schematic cross-sectional views
illustrating other examples of the outer packing material for
vacuum insulation material in the present disclosure.
[FIGS. 5] are schematic cross-sectional views
illustrating other examples of an outer packing material for
vacuum insulation material in the present disclosure.
[FIGS. 6] are a schematic perspective view and a
cross-sectional view illustrating an example of a vacuum
insulation material in the present disclosure.
Description of Embodiments
[0012]
The present disclosure includes an outer packing material
for vacuum insulation material, a vacuum insulation material,
and an article provided with a vacuum insulation material as
its embodiments. Embodiments of the present disclosure are
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hereinafter explained with reference to, for example, drawings.
However, the present disclosure is enforceable in a variety of
different forms, and thus should not be taken as is limited to
the contents described in the embodiments exemplified as below.
Also, the drawings may show the features of the invention such
as width, thickness, and shape of each member schematically
comparing to the actual form in order to explain the invention
more clearly in some cases; however, it is merely an example,
and thus does not limit the interpretation of the present
disclosure. Also, in the present descriptions and each drawing,
for the factor same as that described in the figure already
explained, the same reference sign is indicated and the detailed
explanation thereof may be omitted. Also, for the convenience
of explanation, explanation may be made using the terms upward
or downward in some cases, but the direction of up and down may
be reversed.
An outer packing material for vacuum insulation
material comprising a film including a substrate including
polyethylene terephthalate, and an inorganic layer including
inorganic material that is disposed on at least one surface of
the substrate, wherein
a lamellar period of the substrate is 13.0 nm or more and
16.0 nm or less.
[Claim 2] The outer packing material for vacuum insulation
material according to claim 1, wherein the inorganic material
constituting the inorganic layer is aluminum, aluminum oxide,
or silicon oxide.
[Claim 3] A vacuum insulation material comprising a core
material, and an outer packing material enclosing the core
material; wherein
the outer packing material is the outer packing material
for vacuum insulation material according to claim 1 or 2.
[Claim 4] An article provided with vacuum insulation material
comprising an article including a thermal insulation region,
and a vacuum insulation material, wherein
the vacuum insulation material includes a core material,
and an outer packing material enclosing the core material; and
the outer packing material is the outer packing material
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for vacuum insulation material according to claim 1 or 2.