JP2006342922A - Vacuum heat insulating material and footwear using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material bendable and less in heat insulating performance degradation due to bending. <P>SOLUTION: The vacuum heat insulating material 1 comprises a plurality of core materials 4 packaged with a laminated film 5 and individually vacuum-sealed to form an independent space, and perforated cuts 6 provided in the laminated film 5, not connected to a space for the core materials 4, in the direction of intersecting the vacuum heat insulating material 1. Thus, it has bending strength relatively lower than the other part of the laminated film 5 and is bendable at a folding line. It can be bent at a position where it is not connected to the arrangement space for the core materials, rather than at the edge of the core materials 4, and so the arrangement space for the core materials 4 can be kept in a decompression condition even when there are cracking or pin-holes in the folding line of the laminated film 5, thus suppressing the degradation of the heat insulating performance. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vacuum heat insulating material with added flexibility and footwear to which the vacuum heat insulating material is applied.

  Conventionally, there is a vacuum heat insulating material to which flexibility is added by constituting a plurality of core materials (see, for example, Patent Document 1).

FIG. 12 is a cross-sectional view of a conventional vacuum heat insulating material. In FIG. 12, the vacuum heat insulating material 1 includes a plurality of heat insulating space holding materials 2 arranged on the same plane and a flexible container 3 including the heat insulating space holding material 2. 2 is vacuum sealed. With this configuration, the contact surface of each small piece of the heat insulating holding material 2 becomes a streak and can be easily bent with respect to the bending stress. Here, the vacuum heat insulating material is used to hold the heat insulating space in the container. The material is covered and vacuum-sealed, and the inside of the heat insulating space holding material is evacuated to lower the thermal conductivity by gas and realize low thermal conductivity.
JP-A 61-173931

  However, in the above-described conventional configuration, the flexible container 3 can be bent at the contact surface of each small piece of the heat insulating holding material 2, but a large load is applied to the flexible container 3, and cracks and pinholes are generated. It tends to occur. Since the place where the crack and the pinhole are generated is the place connected to the space where the heat insulating holding material 2 is arranged, there is a problem that the flexible container 3 cannot maintain the vacuum state and the heat insulating performance is deteriorated.

  An object of this invention is to provide the vacuum heat insulating material which can be bent and does not cause the fall of heat insulation performance by bending.

  In order to achieve the above object, the vacuum heat insulating material according to the present invention has a plurality of heat insulating holding materials sealed in an independent space in a flexible container, and is folded at a place separated from the independent space of the flexible container. Is provided.

  As a result, it is difficult to bend at the contact surface of the heat insulating holding material, and it is bent at a portion not connected to the space where the heat insulating holding material is arranged.

  The vacuum heat insulating material of the present invention can be bent, and a vacuum heat insulating material that does not cause deterioration of the vacuum state by bending and does not cause a decrease in heat insulating performance can be provided.

  The invention of a vacuum heat insulating material according to claim 1 is a vacuum heat insulating material in which a plurality of core materials are covered with a laminate film, and the core material is vacuum-sealed in at least two or more independent spaces on the same plane. Among the portions where the core material is divided into the independent spaces, a crease having a bending strength relatively weaker than that where the core material is divided into the independent spaces is provided in a portion excluding the boundary with the core material arrangement space. Is.

  Thereby, when the vacuum heat insulating material is bent, it is not bent at the time of the core material, but is bent at a fold line provided in advance. Therefore, even if a hole is made in the bent portion of the laminate film by bending, it is a portion that is not connected to the space in which the core material is disposed, so that the space in which the core material is disposed can be kept in a reduced pressure state. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  The invention of the vacuum heat insulating material according to claim 2 is such that the crease in the invention according to claim 1 is provided in a straight line.

  In the present invention, since the crease is provided in a straight line, the vacuum heat insulating material is easily bent at the place where the crease is formed. Therefore, it is not bent at the time of the core material, and it is bent at a place where it is not connected to the space where the core material is arranged, so the space where the core material is arranged even if cracks or pinholes occur in the fold of the laminate film Can be kept under reduced pressure. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  According to a third aspect of the present invention, the crease in the first or second aspect of the present invention is formed by providing at least two cuts in the laminate film.

  In the present invention, by providing the cuts, the bending strength becomes relatively weaker than the part where the core material of the laminate film is divided into independent spaces, and a crease can be formed. Therefore, it is not bent at the time of the core material, and it is bent at a place where it is not connected to the space where the core material is arranged, so the space where the core material is arranged even if cracks or pinholes occur in the fold of the laminate film Can be kept under reduced pressure. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  Further, even when the core material interval is narrow, a crease can be easily formed because only the cut is provided by cutting.

  Further, since the laminate film has a cut, air permeability is improved. Thereby, moisture can be released and it can be applied to applications where moisture is a problem.

  According to a fourth aspect of the invention, the crease in the invention according to any one of the first to third aspects is provided up to the end of the vacuum heat insulating material, and at least cut into both ends of the fold. It is formed by providing.

  In the present invention, the crease is formed at both end portions of the vacuum heat insulating material, and the both end portions are formed by cutting so that the end of the vacuum heat insulating material can be easily folded at the crease. Therefore, it is not bent at the time of the core material, and it is bent at a place where it is not connected to the space where the core material is arranged, so the space where the core material is arranged even if cracks or pinholes occur in the fold of the laminate film Can be kept under reduced pressure. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  In addition, even when the interval between the core materials is narrow, the bent portion can be easily formed because the cut is only provided by cutting.

  Moreover, since there is a cut in the laminate film, the air permeability of the vacuum heat insulating material in the heat insulating direction is improved. Thereby, moisture can be released and it can be applied to applications where moisture is a problem.

  The footwear invention according to claim 5 is the footwear in which the vacuum heat insulating material according to any one of claims 1 to 4 is disposed on an inner bottom surface, and the fold of the vacuum heat insulating material is the footwear of the footwear. It is in the width direction.

  In the present invention, since the crease is formed in the width direction, which is a portion that bends when walking, the user can walk without a sense of incongruity. In addition, the vacuum heat insulating material has high heat insulating properties, effectively keeping body heat and shutting off cold air, and can keep the foot comfortable even in winter sports and cold areas.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a perspective view of a vacuum heat insulating material in Embodiment 1 of the present invention, FIG. 2 is a plan view of the vacuum heat insulating material in the same embodiment, and FIG. 3 is a longitudinal sectional view of the vacuum heat insulating material in the same embodiment. .

  1, 2, and 3, the vacuum heat insulating material 1 wraps a plurality of core materials 4 with a laminate film 5, depressurizes the inside of the laminate film 5, and each core material 4 is in a space independent from each other. The laminated film 5 is welded and vacuum-sealed up to the core material 4 located at the position where the core material 4 of the laminated film 5 is separated into independent spaces and connected to the core material 4 arrangement space. A notch 6 is provided in a perforated position at a position where it is not. By providing the cuts 6, the bending strength of the six perforated cuts is relatively weaker than other portions of the laminate film 5.

  The cut 6 is preferably provided in a straight line. Moreover, although there exists a perforation shape, the length of each notch 6 may be disjoint.

  In the configuration of the present embodiment, the laminate film 5 is welded up to the core material 4, but it is not necessary to weld the laminate film 5 as long as the independent space between the core materials 4 can be maintained. Moreover, the core material 4 and the laminate film 5 may be welded. In the present embodiment, one core member 4 is disposed in one independent space, but a plurality of core members 4 may be disposed in one independent space.

  In general, the vacuum heat insulating material 1 can exhibit excellent heat insulating performance by setting the internal vacuum degree to 1 Pa to 100 Pa. The laminate film 5 is formed by laminating a plurality of films, using a protective layer on the outside, aluminum foil or the like as a gas barrier layer on the middle, and a heat-welded layer on the inside. The core material 4 is a material mainly composed of silica powder or a fiber-based core material mainly composed of glass wool.

  With the configuration as described above, the vacuum heat insulating material 1 according to the first embodiment is provided with the notch 6 at a location where the vacuum state of the core material 4 can be maintained, so that the core material 4 of the laminate film 5 has a bending strength in an independent space. It becomes weaker than the part where it is divided, and a crease is formed. Thereby, when the vacuum heat insulating material 1 is bent, it is not bent at the time of the core material 4 but is bent at a crease provided in advance. Moreover, even if there is a load in the heat insulation direction of the vacuum heat insulating material 1, it bends at a fold.

  Therefore, the core material 4 is not bent at the time of the core material 4 and is folded at a fold line that is not connected to the space in which the core material 4 is arranged. Since the portion is not connected to the arranged space, the space in which the core material 4 is arranged can be kept in a reduced pressure state. Thereby, since deterioration of heat insulation performance can be suppressed, it is applicable also to the use for which flexibility is required.

  Further, even when the interval between the core members 4 is narrow, the folds can be easily formed because the notches 6 are merely provided by cutting.

  In this embodiment, the fold is formed by making a cut 6 in the laminate film 5, but the fold may be formed by compressing the laminate film 5 under pressure.

  Moreover, since there is the notch 6 in the laminate film 5, the air permeability of the vacuum heat insulating material 1 in the heat insulating direction is improved. Thereby, moisture can be released and it can be applied to applications where moisture is a problem.

  In addition, when using this vacuum heat insulating material 1 by wrapping it with another member, it is desirable to provide a crease at a portion overlapping the fold of the vacuum heat insulating material 1 of the member.

(Embodiment 2)
FIG. 4 is a plan view of the vacuum heat insulating material according to Embodiment 2 of the present invention.

  As shown in FIG. 4, the vacuum heat insulating material 1 of the present embodiment has a single row of cuts 6 provided in a perforated shape, and the laminate film 5 is cut off at both ends of the cuts 6 provided in the perforated shape. The notch 7 is provided, and the rest of the configuration is the same as that of the vacuum heat insulating material 1 of the first embodiment.

  With the above configuration, there is a notch 7 at the end of the vacuum heat insulating material 1, and there is a perforated cut 6 from the tip of the notch 7, so that the core material 4 is formed at the end of the vacuum heat insulating material 1. It is difficult to bend at the time, and it folds at a fold that is not connected to the space where the core material 4 is arranged. Therefore, even if a crack or a pinhole occurs in the fold of the laminate film 5, the space where the core material 4 is arranged It can be kept under reduced pressure. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  In addition, since the laminate film 5 has the cuts 6, the air permeability of the vacuum heat insulating material 1 in the heat insulating direction is improved. Thereby, moisture can be released and it can be applied to applications where moisture is a problem.

(Embodiment 3)
FIG. 5 is a plan view of a vacuum heat insulating material according to Embodiment 3 of the present invention.

  As shown in FIG. 5, the vacuum heat insulating material 1 of the present embodiment is characterized in that the notch 6 provided in a perforated shape is not connected to the end of the vacuum heat insulating material 1, and otherwise, The configuration is the same as that of the vacuum heat insulating material 1 of the first embodiment.

  Even in the configuration as described above, since the two or more cuts 6 are provided in a straight line, the end of the vacuum heat insulating material 1 can be bent linearly. Therefore, when the vacuum heat insulating material 1 is folded, it is difficult to bend at the core material 4, and it is folded at a fold not connected to the space where the core material 4 is arranged. Even if a hole is generated, the space in which the core material 4 is disposed can be kept in a reduced pressure state. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required. Moreover, since the notch 6 is not connected to the edge part of the vacuum heat insulating material 1, it can suppress that the vacuum heat insulating material 1 is torn from an edge part.

  In addition, since the laminate film 5 has the cuts 6, the air permeability of the vacuum heat insulating material 1 in the heat insulating direction is improved. Thereby, moisture can be released and it can be applied to applications where moisture is a problem.

(Embodiment 4)
FIG. 6 is a plan view of a vacuum heat insulating material according to Embodiment 4 of the present invention.

  As shown in FIG. 6, the vacuum heat insulating material 1 of the present embodiment has a perforated cut 6 formed by a rectangular through hole 8 that is long in the row direction of the perforation, and the perforated through hole 8 is It is characterized by only one set of rows parallel to each other, and the other configuration is the same as that of the vacuum heat insulating material 1 of the first embodiment.

  With the configuration as described above, the bending strength at the location where the through holes 8 are perforated is relatively weaker than the location where the core material 4 of the laminate film 5 is divided into independent spaces, and a fold can be formed. . Therefore, the core material 4 is not bent at the time of the core material 4 and is folded at a fold line that is not connected to the space in which the core material 4 is arranged. The arranged space can be kept in a reduced pressure state. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  Further, since the through hole 8 is formed in the vacuum heat insulating material 1, the air permeability of the vacuum heat insulating material 1 in the heat insulating direction is improved as compared with the case of the notch 6. Thereby, moisture can be released and it can be applied to applications where moisture is a problem.

(Embodiment 5)
FIG. 7 is a plan view of a vacuum heat insulating material according to Embodiment 5 of the present invention.

  As shown in FIG. 7, the vacuum heat insulating material 1 according to the present embodiment is obtained by changing the shape of the perforated through holes 8 in the fourth embodiment into an elliptical shape or a rhombus that is long in the row direction of the perforations. .

  By providing the through hole 8 as described above, the bending strength of the portion where the through hole 8 is perforated is relatively weaker than the portion where the core material 4 of the laminate film 5 is divided into independent spaces. A crease is formed. In particular, a fold is easily formed in a direction in which the acute angle portion of the through hole 8 is directed. Thereby, when the vacuum heat insulating material 1 is bent, it is not bent at the time of the core material 4 but is bent at a crease provided in advance. Therefore, the core material 4 is not bent at the time of the core material 4 and is folded at a fold line that is not connected to the space in which the core material 4 is arranged. The arranged space can be kept in a reduced pressure state. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  Further, since the through hole 8 is formed in the vacuum heat insulating material 1, the air permeability of the vacuum heat insulating material 1 in the heat insulating direction is improved as compared with the case of the notch 6. Thereby, moisture can be released and it can be applied to applications where moisture is a problem.

  In addition, when a force is applied in the direction of tearing the vacuum heat insulating material 1, if the through-hole 8 is a circle or an ellipse, the force is more dispersed than in the case of a straight cut, and thus it is difficult to be torn. This is particularly noticeable at the end of the vacuum heat insulating material 1. Therefore, a crease formation method may be selected according to the intended use.

(Embodiment 6)
FIG. 8 is a plan view of a vacuum heat insulating material in Embodiment 6 of the present invention.

  As shown in FIG. 8, the vacuum heat insulating material 1 according to the present embodiment is characterized in that a notch 6 and a through hole 8 are mixed in a perforated shape to provide a crease, and otherwise the vacuum according to the first embodiment. The configuration is the same as that of the heat insulating material 1. In addition, the position where the through hole 8 is provided is a position where the crease and the crease provided in the vertical and horizontal directions of the vacuum heat insulating material 1 intersect.

  With the configuration as described above, the bending strength of the portion where the cut 6 and the through hole 8 are perforated is relatively weaker than the portion where the core material 4 of the laminate film 5 is divided into independent spaces, and the crease Can be formed. Therefore, the core material 4 is not bent at the time of the core material 4 and is folded at a fold line that is not connected to the space in which the core material 4 is arranged. The arranged space can be kept in a reduced pressure state. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  Further, since the through hole 8 is formed in the vacuum heat insulating material 1, the air permeability of the vacuum heat insulating material 1 in the heat insulating direction is improved as compared with the case of the notch 6. Thereby, moisture can be released and it can be applied to applications where moisture is a problem.

  Further, since the distance between the core material 4 and the portion where the hole is provided can be increased as compared with the case where only the through hole 8 is provided, gas intrusion into the space of the core material 4 can be reduced. Therefore, deterioration of the heat insulation performance in the long term can be suppressed.

(Embodiment 7)
FIG. 9 is a plan view of a vacuum heat insulating material according to Embodiment 7 of the present invention.

  As shown in FIG. 9, the vacuum heat insulating material 1 of the present embodiment has only two rows of cuts 6 provided in a perforated shape, and does not equally divide the core material 4 and the core material 4. The other features are the same as those of the vacuum heat insulating material 1 of the first embodiment.

  Even in the configuration as described above, when the vacuum heat insulating material 1 is folded, the core material 4 is not bent, but is bent at a crease provided in advance. Therefore, the core material 4 is not bent at the time of the core material 4 and is folded at a fold line that is not connected to the space in which the core material 4 is arranged. The arranged space can be kept in a reduced pressure state. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

(Embodiment 8)
FIG. 10 is a side view of footwear according to the eighth embodiment of the present invention. FIG. 11 is a plan view of an insole-shaped vacuum heat insulating material according to Embodiment 8 of the present invention.

  As shown in FIGS. 10 and 11, the footwear 9 of the present embodiment is a footwear 9 in which the insole-shaped vacuum heat insulating material 1 is disposed on the inner bottom surface. The vacuum heat insulating material 1 is the one described in any of Embodiments 1 to 7, and is provided at the bottom of the footwear 9 so that the fold line is in the width direction of the footwear 9. The vacuum heat insulating material 1 is covered with a cover member 10. Here, the width direction of the footwear 9 is a direction other than a direction connecting the toes and the heel, and is a direction in which a fold line is formed by the notch 6 in FIG.

  Here, in the cover member 10, it is desirable to provide a portion where the bending strength is relatively weaker than the other portions of the cover member in a portion overlapping the crease of the vacuum heat insulating material 1.

  With the configuration as described above, the crease is formed at the base of the finger, which is a part that bends when walking, so that the user can walk without a sense of incongruity. Even if it walks, it will not bend in the case of the core material 4, and it will bend in the place which is not connected with the space where the core material 4 is arrange | positioned, Therefore Core material even if a crack and a pinhole generate | occur | produce in the fold of the laminate film 5 The space in which 4 is arranged can be kept in a reduced pressure state. Thereby, deterioration of heat insulation performance can be suppressed and it can apply also to the use for which flexibility is required.

  In addition, by providing a portion of the cover member 10 that overlaps the fold of the vacuum heat insulating material 1 with a bending strength that is relatively weaker than the other portions of the cover member 10, the vacuum heat insulating material 1 is easily bent at the fold.

  Moreover, the vacuum heat insulating material 1 has high heat insulating properties, and the body heat can be kept warm and the cool air can be effectively cut off, so that the foot can be kept comfortable even in winter sports and cold areas.

  In the present embodiment, there are two core members 4 and folds are formed only in the width direction. However, the creases are formed only in the width direction and in other directions. May be. By forming the core material 4 in a plurality and providing folds, the vacuum heat insulating material 1 bends at the folds along the load surface with respect to the load. Therefore, it is possible to suppress cracking due to bending at the crease and reduction in the reduced pressure state at the pinhole, and reduction in heat insulation performance can be reduced.

  As described above, the vacuum heat insulating material according to the present invention has excellent heat insulating performance, and even when used in bending applications, the vacuum heat insulating material is difficult to break and can be used without deteriorating the heat insulating performance. The present invention can be applied not only to the footwear shown in the embodiment mode of the invention but also to clothes, gloves, hats, mats, curtains, blinds, foldable heat insulating containers, and the like.

The perspective view of the vacuum heat insulating material in Embodiment 1 of this invention Plan view of vacuum heat insulating material in the same embodiment Vertical sectional view of the vacuum heat insulating material in the same embodiment The top view of the vacuum heat insulating material in Embodiment 2 of this invention The top view of the vacuum heat insulating material in Embodiment 3 of this invention The top view of the vacuum heat insulating material in Embodiment 4 of this invention The top view of the vacuum heat insulating material in Embodiment 5 of this invention The top view of the vacuum heat insulating material in Embodiment 6 of this invention The top view of the vacuum heat insulating material in Embodiment 7 of this invention Side view of footwear in Embodiment 8 of the present invention Plan view of insole-shaped vacuum heat insulating material in footwear of the embodiment Vertical section of conventional vacuum insulation

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum heat insulating material 4 Core material 5 Laminated film 6 Notch 7 Notch 8 Through-hole 9 Footwear

Claims (5)

  In a vacuum heat insulating material in which a plurality of core materials are covered with a laminate film and the core materials are vacuum-sealed in at least two or more independent spaces on the same plane, where the core material of the laminate film is divided into the independent spaces Among these, the vacuum heat insulating material which provided the crease relatively weaker than the location where bending strength is divided | segmented into the said independent space in the part except the boundary with core material arrangement | positioning space.   The vacuum heat insulating material according to claim 1, wherein the fold is provided in a straight line.   The vacuum heat insulating material according to claim 1 or 2, wherein the fold is formed by providing at least two or more cuts in the laminate film.   The vacuum heat insulating material according to any one of claims 1 to 3, wherein the crease is provided up to an end of the vacuum heat insulating material, and is formed by providing cuts at least at both ends of the fold.   Footwear in which the vacuum heat insulating material according to any one of claims 1 to 4 is disposed on an inner bottom surface, wherein the folds of the vacuum heat insulating material are in the width direction of the footwear.

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