US20080190942A1 - Heat Insulated Container - Google Patents

Heat Insulated Container Download PDF

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Publication number
US20080190942A1
US20080190942A1 US11/720,599 US72059905A US2008190942A1 US 20080190942 A1 US20080190942 A1 US 20080190942A1 US 72059905 A US72059905 A US 72059905A US 2008190942 A1 US2008190942 A1 US 2008190942A1
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US
United States
Prior art keywords
container
external
internal
heat insulated
particle diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/720,599
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English (en)
Inventor
Takafumi Fujii
Yu Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thermos KK
Original Assignee
Thermos KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thermos KK filed Critical Thermos KK
Assigned to THERMOS K.K. reassignment THERMOS K.K. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUJII, TAKAFUMI, KOBAYASHI, YU
Publication of US20080190942A1 publication Critical patent/US20080190942A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J41/00—Thermally-insulated vessels, e.g. flasks, jugs, jars
    • A47J41/0055—Constructional details of the elements forming the thermal insulation
    • A47J41/0072—Double walled vessels comprising a single insulating layer between inner and outer walls
    • A47J41/0077—Double walled vessels comprising a single insulating layer between inner and outer walls made of two vessels inserted in each other
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J41/00—Thermally-insulated vessels, e.g. flasks, jugs, jars
    • A47J41/02—Vacuum-jacket vessels, e.g. vacuum bottles
    • A47J41/022—Constructional details of the elements forming vacuum space
    • A47J41/024—Constructional details of the elements forming vacuum space made of glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3837—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a bottle, jar or like container
    • B65D81/3841—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a bottle, jar or like container formed with double walls, i.e. hollow

Definitions

  • the present invention relates to a heat insulated container, and more specifically, relates to a glass heat insulated container formed by uniting an internal container with an external container and evacuating a gap provided between the internal container and the external container to a vacuum.
  • a glass heat insulated container is produced by disposing a glass internal container inside a glass external container with a constant gap provided therebetween, melting the vicinity of the opening area to thereby integrally unite the internal container with the external container, and evacuating the gap to a vacuum to thereby provide a vacuum insulating layer.
  • a radiation preventing film such as an ITO film (a substance produced by doping indium (In) oxide with tin (Sn)) so as to decrease movement of heat between the inside and outside of the heat insulated container, and this coating is carried out by means of sputtering, CVD, PVD, and the like (for example, refer to Japanese Unexamined Patent Publication No. 2003-299582).
  • the heat retaining performance of the radiation preventing film can vary.
  • the heat retaining performance of the radiation preventing film can differ before and after replacing targets in some cases.
  • this heat retaining performance is related to the thickness of the radiation preventing film.
  • the heat insulated container needs to be cut in order to measure the film thickness and a container that has been cut cannot be used as a product. Therefore, whether or not a heat insulated container has a predetermined heat retaining performance needs to be determined directly, not by measuring the film thickness, but by measuring the temperature of hot water that has been poured into the heat insulated container a few hours prior to measurement, after the heat insulated container has been assembled up to the final process. This examination is time consuming, and results in increased manufacturing cost.
  • the radiation preventing film cannot be re-coated on a heat insulated container that has already been completed, and the heat insulated container is discarded. As a result, the overall manufacturing cost increases.
  • the present invention has been achieved to solve these problems, and it is an object of the present invention to provide a heat insulated container having a constant heat insulation performance, in which the presence of this heat insulation performance can be non-destructively confirmed.
  • the present inventors earnestly carried out research in order to solve the problems mentioned above and, as a result, have discovered that there is a constant relationship between the average particle diameter of particles of the radiation preventing film surface and its heat retaining performance. Consequently, it has been discovered that a constant performance can be ensured by maintaining this particle diameter at or above a predetermined value, leading to the present invention.
  • a heat insulated container is a heat insulated container formed by coating a radiation preventing film on at least one surface of an external surface of an internal glass container and an internal surface of an external glass container, disposing the internal container inside the external container with a gap provided therebetween, joining an opening area of the internal container with an opening area of the external container, and evacuating the gap to a vacuum and sealing it, wherein an average particle diameter of particles on the surface of the radiation preventing film is a predetermined value or more.
  • a heat insulated container is a heat insulated container formed by coating a radiation preventing film on at least one surface of an external surface of an internal glass container and an internal surface of an external glass container, disposing the internal container inside the external container with a gap provided therebetween, joining an opening area of the internal container with an opening area of the external container, and evacuating the gap to a vacuum and sealing it, wherein an average particle diameter of particles on the surface of the radiation preventing film on a part present in at least a side portion of the heat insulated container is a predetermined value or more.
  • a heat insulated container according to a third aspect of the present invention is characterized in that in the foregoing aspects, the predetermined value is 50 nm.
  • a heat insulated container according to a fourth aspect of the present invention is characterized in that in any one of the foregoing aspects, the film thickness of the radiation preventing film is 150 nm or more.
  • a heat insulated container according to a fifth aspect of the present invention is characterized in that in any one of the foregoing aspects, the radiation preventing film is an ITO film.
  • the heat insulated container of the present invention by making the average particle diameter of the particles on the surface of the radiation preventing film to be a predetermined value or more, sufficient heat retaining performance can be obtained.
  • the particle diameter can be measured non-destructively by observation from the outside, examination can be made quickly and, in the case where the coating is judged to be insufficient, a film can be formed over the top. Therefore, the examined heat insulated container is not wasted, and the overall manufacturing cost can be reduced as a result.
  • the portion of the radiation preventing film that greatly influences the heat retaining performance of the heat insulated container is the portion on the side of the heat insulated container. Therefore, as long as the average particle diameter of the surface particles on the portion of the radiation preventing film on at least the side portion of the heat insulating container is a predetermined value or more, sufficient heat retaining performance can be ensured.
  • the average particle diameter of the surface particles of the radiation preventing film is 50 nm or more, a heat insulating container provided with the radiation preventing film, after being filled with 1000 cc of hot water at 95° C. and sealed, and then left in a room of a temperature of 20° C. for six hours, will be able to maintain the temperature of the hot water thereinside at 60° C. or more.
  • the thickness of the radiation preventing film is 150 nm or more, a heat insulating container provided with the radiation preventing film, after being filled with 1000 cc of hot water at 95° C. and sealed, and then left in a room of a temperature of 20° C. for six hours, will be able to maintain the temperature of the hot water thereinside at 60° C. or more.
  • FIG. 1 is a sectional view of a heat insulated container of a preferred embodiment of the present invention.
  • FIG. 2 is a graph showing a relationship between an ITO particle diameter, heat retaining performance, and the thickness of an ITO film.
  • FIG. 3 is a graph showing a relationship between an ITO particle diameter, heat retaining performance, and the thickness of an ITO film under conditions different from that of FIG. 2 .
  • FIG. 4 shows enlarged photographs of ITO films of various particle diameters.
  • FIG. 1 is a sectional view of a heat insulated container 10 in the embodiment of the present invention.
  • the heat insulated container 10 of the present embodiment includes a glass internal container 12 , and a glass external container 16 arranged outside of the internal container 12 with a gap 14 having a constant width.
  • the external container 16 is formed by joining an upper external container 16 a and a lower external container 16 b with each other, and the internal container 12 and the upper external container 16 a are joined with each other at an opening area 18 .
  • the gap 14 between an internal surface of the external container 16 and an external surface of the internal container 12 is maintained in a vacuum state.
  • the external surface of the internal container 12 is coated with an ITO film 20 that serves as a radiation preventing film for reducing heat radiation.
  • This ITO film 20 is coated by means of a sputtering method and the surface thereof, when observed from the outside, has particles having a diameter at or above a predetermined value.
  • the entire surface of the ITO film 20 in the present embodiment has particles of a diameter at or above the predetermined value.
  • this predetermined diameter refers to the minimum particle diameter at which, even after filling and sealing 1000 cc of hot water at 95° C. inside the heat insulated container provided with the ITO film, the surface of which has particles of a diameter at or above this predetermined value, and then leaving it in a room temperature at 20° C. for six hours, the temperature of the hot water inside the heat insulated container is still maintained at 60° C. or more.
  • the temperature of the hot water after 1000 cc of hot water at approximately 95° C. has been filled in and sealed inside the heat insulated container and the container has been left in a room at 20° C. for six hours is referred to as the heat retaining performance, and this 60° C. is the minimum temperature that the functionality of a heat insulated container is generally required to achieve.
  • the temperature of the hot water inside the heat insulated container 10 will be measured at 60° C. or more if 1000 cc of the hot water at 95° C. has been filled in and sealed inside the heat insulated container 10 of the present embodiment and the container has been left in a room at 20° C. for six hours.
  • the heat insulated container 10 of the present embodiment is a heat insulated container 10 formed by coating the ITO film 20 on the external surface of the glass internal container 12 , disposing the internal container 12 inside the external container 16 with the gap 14 , joining the internal container 12 and the external container 16 , and evacuating the gap 14 to a vacuum and sealing it, wherein the average particle diameter of the particles on the surface of the ITO film 20 is at the predetermined value or more.
  • this heat insulated container 10 by making the average particle diameter of the particles on the surface of the ITO film 20 to be of the predetermined value or more, the heat retaining performance of 60° C. can be obtained. Furthermore, since the particle diameter can be non-destructively examined by external observation, the examination can be carried out quickly. Moreover, even if the coating is determined to be insufficient, a film can be additionally formed on the coated ITO film since it has been non-destructively examined. Therefore, the examined heat insulated container is not wasted, and the overall manufacturing cost can be reduced as a result.
  • the ITO film 20 is used as the radiation preventing film.
  • the type of the radiant heat preventing film is not limited to this, and it may be a metal oxide (semiconductor) such as ZnO, SiO x , SnO 2 , or TiO x .
  • the average particle diameter of the surface particles of the radiation preventing film in this case is a particle diameter that is at least the minimum particle diameter at which, after filling and sealing 1000 cc of hot water at 95° C. inside a heat insulated container provided with the radiation preventing film, and then leaving it a room at 20° C. for six hours, the temperature of the hot water inside the heat insulated container can be maintained at 60° C. or more.
  • the ITO film 20 is coated on the external surface of the internal container 12 .
  • the surface to be coated is not limited to this, and it may be another surface, for example, the internal surface of the external container 16 or the like.
  • Graph A in FIG. 2 is a graph showing the relationship between heat retaining performance and ITO particle diameter, with the heat retaining performance (° C.) of a heat insulated container on the vertical axis, and the ITO particle diameter (nm) on the horizontal axis. Moreover on the left side of the graph, a heat retaining performance scale is shown. As this graph A shows, in the case of a heat insulated container in which the external surface of the internal container is covered with an ITO film with surface particles of an average particle diameter of 50 nm or more, even after 6 hours, the temperature of the hot water can be maintained at 60° or more.
  • the particle diameter is preferably 50 nm or more, and more preferably 60 nm or more. Furthermore, considering sputtering efficiency, the particle diameter is preferably no more than 200 nm, and considering efficiency still further, it is preferably no more than 150 nm.
  • graph B is a graph showing the relationship between the ITO film thickness and the particle diameter, with the ITO film thickness (nm) shown on the vertical axis, and the diameter of the ITO particles (nm) shown on the horizontal axis as in graph A.
  • the right hand side of the graph shows a scale of the ITO film thickness. This straight line deviates slightly from the actual plot. However, this is because this straight line represents an approximation formula found from the measured values shown in FIG. 3 of an example 2 described below.
  • a particle diameter of 50 nm corresponds to a film thickness of 150 nm, a particle diameter of 60 nm to a film thickness of 200 nm, a particle diameter of 200 nm to a film thickness of 800 nm, and a particle diameter of 150 nm to a film thickness of 600 nm. Therefore, expressing the conditions of the above particle diameters as film thicknesses, the ITO film is preferably 150 nm or more, and more preferably 200 nm or more. Furthermore, considering sputtering efficiency, the ITO film thickness is preferably no more than 800 nm, and considering efficiency still further, it is preferably no more than 600 nm.
  • Graph A in FIG. 3 is a graph showing the relationship between heat retaining performance and ITO particle diameter, with the heat retaining performance (° C.) of a heat insulated container on the vertical axis, and the ITO particle diameter (nm) on the horizontal axis. Moreover, as with FIG. 2 , on the left side of the graph, a heat retaining performance scale is shown. As this graph A shows, even under different conditions from those of example 1, it can be seen that in the case of a heat insulated container in which the external surface of the internal container is covered with an ITO film with surface particles of an average particle diameter of 50 nm or more, even after 6 hours, the temperature of the hot water can be maintained at 60° or more.
  • the particle diameter is preferably 50 nm or more, and more preferably 60 nm or more. Furthermore, considering sputtering efficiency, the particle diameter is preferably no more than 150 nm, and considering efficiency still further, it is preferably no more than 120 nm.
  • graph B is a graph showing an approximation formula found from actual measured values, of the relationship between the ITO film thickness and the ITO particle diameter, with the ITO film thickness (nm) shown on the vertical axis, and the diameter of the ITO particles (nm) shown on the horizontal axis as in graph A.
  • the right hand side of the graph shows a scale of the ITO film thickness.
  • a particle diameter of 50 nm corresponds to a film thickness of 150 nm, a particle diameter of 60 nm to a film thickness of 200 nm, a particle diameter of 120 nm to a film thickness of 500 nm, and a particle diameter of 150 nm to a film thickness of 600 nm.
  • the ITO film is preferably 150 nm or more, and more preferably 200 nm or more. Furthermore, considering sputtering efficiency, the ITO film thickness is preferably no more than 600 nm, and, considering efficiency still further, it is preferably no more than 500 nm.
  • FIG. 4 is enlarged photographs of the surfaces of ITO films.
  • the particles of the ITO film surface are not only spherical, and particles of differing sizes are mixed together. Particularly where the particles become as large as approximately 0.2 ⁇ m for example, compared with particles of approximately 0.06 ⁇ m, the shape may become elliptical or polygonal, and the size becomes varied.
  • the average particle diameter of the particles on the ITO film surface refers to the average diameter of a particle of average size, as shown in the photograph.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Thermally Insulated Containers For Foods (AREA)
US11/720,599 2005-03-28 2005-03-28 Heat Insulated Container Abandoned US20080190942A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/005778 WO2006103739A1 (ja) 2005-03-28 2005-03-28 断熱容器

Publications (1)

Publication Number Publication Date
US20080190942A1 true US20080190942A1 (en) 2008-08-14

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US11/720,599 Abandoned US20080190942A1 (en) 2005-03-28 2005-03-28 Heat Insulated Container

Country Status (7)

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US (1) US20080190942A1 (de)
JP (1) JPWO2006103739A1 (de)
CN (1) CN101052334A (de)
CA (1) CA2590409A1 (de)
DE (1) DE112005003091T5 (de)
GB (1) GB2435091A (de)
WO (1) WO2006103739A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130334089A1 (en) * 2012-06-15 2013-12-19 Michael P. Remington, Jr. Glass Container Insulative Coating
USD815901S1 (en) 2016-05-04 2018-04-24 Hardy Steinmann Portable beverage container
US20180141740A1 (en) * 2016-11-18 2018-05-24 Toyota Jidosha Kabushiki Kaisha Vacuum heat-insulating container
USD821146S1 (en) 2016-05-04 2018-06-26 Hardy Steinmann Portable beverage container
CN109528030A (zh) * 2018-12-10 2019-03-29 南充辉泓真空技术有限公司 一种双层玻璃真空保温器皿的制备工艺
CN110312455A (zh) * 2017-02-24 2019-10-08 爱慕莎有限公司 双层真空玻璃保温壶
US11375835B2 (en) 2020-10-29 2022-07-05 Paul Sherburne Insulated beverage container

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111319838A (zh) * 2020-04-15 2020-06-23 苏州联胜化学有限公司 储水瓶

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US6119889A (en) * 1998-06-09 2000-09-19 Nippon Sanso Corporation Transparent insulated container and manufacturing method therefor
US6371328B1 (en) * 1999-03-08 2002-04-16 Nippon Sanso Corporation Heat insulating container
US20030102317A1 (en) * 2001-12-05 2003-06-05 Gordon Lawrence A. Insulated shipping container and method of making the same
US20030168459A1 (en) * 2000-08-30 2003-09-11 Takafumi Fujii Insulated container
US20030189054A1 (en) * 2002-04-08 2003-10-09 Isao Watanabe Heat insulating container and its manufacturing method
US20030222074A1 (en) * 2002-05-30 2003-12-04 Naoho Baba Thermal insulation container with electric heater
US20040011796A1 (en) * 2002-06-13 2004-01-22 Naoho Baba Heat insulating container and manufacture method therefor
US20050230399A1 (en) * 2004-04-15 2005-10-20 Thermos K.K. Vacuum insulating double vessel and method for manufacturing the same
US20070181586A1 (en) * 2004-08-04 2007-08-09 Van Ootmarsum Harry R Storage tank for cold liquids, and method for applying a thermal insulation system in such tank
US20070295684A1 (en) * 2005-03-23 2007-12-27 Takafumi Fujii Heat Insulated Container
US20080314909A1 (en) * 2004-02-10 2008-12-25 Fiji Seal International, Inc Heat Insulating Container
US7569765B2 (en) * 2004-11-22 2009-08-04 Fujikura Ltd. Electrode, photoelectric conversion element, and dye-sensitized solar cell

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US3274788A (en) * 1965-06-14 1966-09-27 Little Inc A Cryogenic liquid storage vessel
US6119889A (en) * 1998-06-09 2000-09-19 Nippon Sanso Corporation Transparent insulated container and manufacturing method therefor
US6371328B1 (en) * 1999-03-08 2002-04-16 Nippon Sanso Corporation Heat insulating container
US20030168459A1 (en) * 2000-08-30 2003-09-11 Takafumi Fujii Insulated container
US6648168B2 (en) * 2000-08-30 2003-11-18 Nippon Sanso Corporation Insulated container
US20030102317A1 (en) * 2001-12-05 2003-06-05 Gordon Lawrence A. Insulated shipping container and method of making the same
US6915917B2 (en) * 2002-04-08 2005-07-12 Thermos K.K. Heat insulating container and its manufacturing method
US20030189054A1 (en) * 2002-04-08 2003-10-09 Isao Watanabe Heat insulating container and its manufacturing method
US20030222074A1 (en) * 2002-05-30 2003-12-04 Naoho Baba Thermal insulation container with electric heater
US6809298B2 (en) * 2002-05-30 2004-10-26 Thermos K.K. Thermal insulation container with electric heater
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US20080314909A1 (en) * 2004-02-10 2008-12-25 Fiji Seal International, Inc Heat Insulating Container
US20050230399A1 (en) * 2004-04-15 2005-10-20 Thermos K.K. Vacuum insulating double vessel and method for manufacturing the same
US20070181586A1 (en) * 2004-08-04 2007-08-09 Van Ootmarsum Harry R Storage tank for cold liquids, and method for applying a thermal insulation system in such tank
US7569765B2 (en) * 2004-11-22 2009-08-04 Fujikura Ltd. Electrode, photoelectric conversion element, and dye-sensitized solar cell
US20070295684A1 (en) * 2005-03-23 2007-12-27 Takafumi Fujii Heat Insulated Container

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130334089A1 (en) * 2012-06-15 2013-12-19 Michael P. Remington, Jr. Glass Container Insulative Coating
USD815901S1 (en) 2016-05-04 2018-04-24 Hardy Steinmann Portable beverage container
USD821146S1 (en) 2016-05-04 2018-06-26 Hardy Steinmann Portable beverage container
USD855403S1 (en) 2016-05-04 2019-08-06 Hydrovaze Llc Portable beverage container
USD855402S1 (en) 2016-05-04 2019-08-06 Hydrovaze Llc Portable beverage container
US20180141740A1 (en) * 2016-11-18 2018-05-24 Toyota Jidosha Kabushiki Kaisha Vacuum heat-insulating container
US10661970B2 (en) * 2016-11-18 2020-05-26 Toyota Jidosha Kabushiki Kaisha Vacuum heat-insulating container
CN110312455A (zh) * 2017-02-24 2019-10-08 爱慕莎有限公司 双层真空玻璃保温壶
CN109528030A (zh) * 2018-12-10 2019-03-29 南充辉泓真空技术有限公司 一种双层玻璃真空保温器皿的制备工艺
US11375835B2 (en) 2020-10-29 2022-07-05 Paul Sherburne Insulated beverage container
US11751707B2 (en) 2020-10-29 2023-09-12 Paul Sherburne Insulated beverage container

Also Published As

Publication number Publication date
JPWO2006103739A1 (ja) 2008-09-04
WO2006103739A1 (ja) 2006-10-05
CN101052334A (zh) 2007-10-10
DE112005003091T5 (de) 2008-02-14
CA2590409A1 (en) 2006-10-05
GB0710438D0 (en) 2007-07-11
GB2435091A (en) 2007-08-15

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