US2863179A - Refrigerating apparatus - Google Patents

Refrigerating apparatus Download PDF

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Publication number
US2863179A
US2863179A US51758155A US2863179A US 2863179 A US2863179 A US 2863179A US 51758155 A US51758155 A US 51758155A US 2863179 A US2863179 A US 2863179A
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bag
insulation
walls
gas
mylar
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Richard S Gaugler
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Motors Liquidation Co
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Motors Liquidation Co
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
    • F25D23/00General constructional features
    • F25D23/06Walls

Description

Dec. 9, 1958 R. s. GAUGLER l 2,863,179

REFRIGERATING APPARATUS Filed June 25, 1955 H/S ATTORNE)l United States Patent REFRIGERATING APPARATUS Richard S. Gaugler, Dayton, hio, assignor to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application June 23, 1955, Serial No. 517,581

Claims. (Cl. 20--4) This invention relates to refrigerating apparatus and more particularly to an improved arrangement for insulating the walls of refrigerators and the like.

It is an object of this invention to provide an improved and practical insulation in which gas having a low coetiicient of conductivity is used in combination with glass fibers or the like.

It is another object of this invention to provide an enclosure material for gas and glass fiber type of insulation which will prevent the escape of the gas as well as prevent the introduction of air or moisture into the insulation.

Still another object of this invention is to provide a packaging material for gas charged insulation which includes a thin plastic sheet having a vapor deposited coating of metal such as aluminum formed on one side of the sheet. l

Prior to this invention it was considered impractical to use a metallic foil as part of the container for the gas and glass fibers due to the fact that the metallic foil would serve to quickly conductthe heat from the one side of the bag to the other side ofthe bag directly through the metal foil itself. It has now been found that by using a vapor deposited metal coating, it is possible to obtain benelits of a metallic film type barrier without any appreciable transfer of heat by conduction through the film itself.

` Another object `of this invention is to provide a gas barrier which represents an improvement over the inventions shown in copending application S. N. 289,482, filed May 23, 1952 now Patent 2,779,066 and S. N. 496,525, tiled March 24, 1955 now Patent 2,817,123.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein a preferred form of the present invention is clearly shown.

In the drawings:

Figure 1 is a perspective view with parts broken away showing a household refrigerator constructed in accordance with the invention; and

Figure 2 is a fragmentary sectional view on a greatly enlarged scale showing the construction of the wall of the inner bag which encloses the insulating gas and fibers.

Figure 3 is a perspective view with parts broken away showing bag insulation including an outer bag containing a compressible insulation and a gasfilled inner bag having the wall construction shown in Fig. 2.

For purposes of illustrating the invention 'there is shown in the drawings a household refrigerator whereas certain aspects of the invention are equally applicable to other types of products wherein it is desired to provide heat or vapor insulation for preventing the rapid transfer of heat or vapor through a wall section or the like.

Referring now to the drawings wherein a preferred embodiment of the invention is disclosed, reference nud 2,863,179 Ice Patented Dec. 9,

meral 10 designates the outer shell or housing of a con# ventional household refrigerator. Reference numerals 11 and 12 designate the liners or innerv walls of the frozen food compartment 16 and unfrozen food compartment 18 respectively of the refrigerator. The space between each inner wall and the outer wall is lled with bag type insulation 14 to be described more fully herein after. Refrigeration is produced by means of a conventional refrigeration system including evaporator coils 20 which surround the liner 11 of the frozen food storage compartment and a second evaporator 22 disposed in the compartment 18. The usual access door 24 is provided for the food compartments as shown.

The insulation 14 is of the bag type and comprises an outer protective bag 30 within which there is dis-` posed a layer of compressible insulation 32 and an inner gas filled hermetically sealed bag 34 containingl fibrous insulation 36. The brous insulation 36 and the insulation 32 comprise glass fibers or the like. The bag 34 is charged with a suitable insulating gas having a low coeicient of conductivity such as difluorodichloromethane, commonly called Freon or F-l2. It has been found lthat by replacing the air with Freon in each of the inner bags of insulation, it is possible to materially reduce the rate of heat transfer through the insulation. This reduction in the heat transfer makes it possible to reduce the thickness of the insulation approximately 50% without increasing the heat losses through the walls of the refrigerator. The big problem in utilizing the insulating properties of Freon or other similar gases is that of providing a bag which will prevent the loss of Freon from the bag during the life of the refrigerator and which will also prevent the ingress of air into the bag. The density of the iiberglass insulation 32 is preferably about 1.2 pounds per cubic f .g foot whereas the density of the fiberglass insulation 36 in the inner bag is preferablyabout 3.7 pounds per cubic foot. For a more detailed discussion of the problems and general construction involved reference should be made to the above mentioned copending applications.

Referring now to Figure 2 of the drawing wherein the construction of the novel inner bag walls has been shown, reference numeral 40 designates a thin sheet of polyester of ethylene glycol and terephthalic acid commonly known as Mylar which has a vapor deposited aluminum coating 42 on each side thereof. Other metals such as silver or copper could be used for the coating but aluminum is the preferred metal for this purpose. The Mylar sheet 40 is preferably approximately .001 inch thick whereas the Vapor deposited aluminum coating is only 600 to 1000 angstrom units thick. The sheet 40, in conjunction with the one or more layers of vapor deposited aluminum, constitutes an ideal barrier to the passage of air, Freon and moisture. In order to protect the metallic deposit 42 from damage in handling, it is preferable to apply layers of Mylar 44 to opposite sides of the metallized sheet 40. It is also desirable to provide a layer of heat scalable material 46 such as vinylidene chloride, commonly known as Saran on one side of material so as to facilitate forming heat sealed seams 47 for sealing the bags. The vapor deposited aluminum coating is applied to the Mylar while the sheet of Mylar is suspended in a vacuum chamber and aluminum vapor is introduced into the chamber so as to deposit itself on the Mylar. The various laminations forming the walls of the bag 34 have not been shown in Figure 3 of the drawing but it is to be understood that walls of the bag 34 are constructed as shown in Figure 2.

In lieu of the outer protective lrns 44 of Mylar one can use vinyl chloride-vinyl acetate copolymer plasticized with acrylo nitrile rubber. This latter material,

commonly known as Hycar vinyl, is desirable in that it is heat scalable and is sufficiently strong to protect the metallized lm which constitutes the main barrier to the passage of gas and moisture. The metallized lm may be applied to materials other than Mylar such as polystyrene but Mylar is the preferred material for receiving the vapor deposited metal lm in that the metal lm adheres much more readily to the Mylar. Experience indicates that the metal adheres to the Mylar as if an interfacial bond is formed between the Mylar and the metal.

Itwill be noted that the compressible insulation 32 adjacent the `hermetically sealed bag allows for eX- pansion and contraction of the bag without causing bulging of the main refrigerator walls and also makes it possible to press the bags against exposed refrigerant lines such as those forming the evaporator Z without leaving objectionable air pockets between the insulation and the refrigerator walls.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, as may come within the scope of the claims which follows.

What is claimed is as follows.

l. In a refrigerator, an outer wall, an inner wall spaced from said outer wall, insulation between said walls supported by said walls, said insulation comprising flexible bag means snugly engaging said walls, ller material within said bag means having voids therein, and a gas lling said voids, said gas having a coecient of thermal conductivity less than that of air, said bag means comprising a plastic film having a vapor deposited metallic coating thereon not more than .00001 inch thick forming a barrier to the passage of said gas, air and moisture.

2. In a refrigerator, an outer wall, an inner wall spaced from said outer wall, insulation between said walls supported by said walls, said insulation comprising ilexible outer bag means snugly engaging said walls, ller material within said bag means having voids therein, and a gas filling said voids, said gas having a coefficient of thermal conductivity less than that of air, said bag means comprising walls formed by a plastic lm having a vapor deposited metallic coating having a thickness of between .000006 and .00001 inch thereon, said plastic film comprising a polyester of ethylene glycol and terephthalic acid.

3. In a refrigerator, an outer wall, an inner wall spaced from said outer wall, insulation between said Walls supported by said walls, said insulation comprising outer bag means snugly engaging said walls, filler material within said bag means having voids therein, and a gas lling said voids, said gas having a coefficient of thermal conductivity less than that or air, said bag means comprising walls formed by a lm of a polyester of ethylenel glycol and terephthalic acid having a vapor deposited metallic coating less than .00001 of an inch thick.

4. Bag type insulation adapted to be confined and supported between spaced walls comprising means forming a bag having a seam, ller material within said bag having voids therein, and a gas filling said voids, said gas having a coeicient of thermal conductivity less than that of air, the walls of said bag comprising a plastic lm having a vapor deposited metallic coating thereon not more than .00001 inch thick and -a layer of scalable `material for sealing the bag at its seam.

5. Bag type insulation adapted to be confined and supported between spaced walls comprising means forming a bag, filler material within said bag having voids therein, a gas lling said voids, said gas having a coelcient of thermal conductivity less than that of air, said bag means comprising walls formed by a lm comprising a polyester of ethylene glycol and terephthalic acid having a vapor deposited metal coating less than .00001 of an inch thick.

References Cited in the tile of this patent UNITED STATES PATENTS 1,637,497 ODowd Aug. 2, 1927 1,927,879 Spalord Sept. 26, 1933 2,067,015 Munters Jan. 5, 1937 2,205,778 Forsthoefel June 25, 1940 2,382,432 McManus Aug. 14, 1945 2,384,500 Stoll Sept. 11, 1945 2,602,302 PouX July 8, 1952 2,672,021 Rataiczak Mar. 16, 1954 2,699,402 Meyer Jan. 1l, 1955 2,702,580 Bateman Feb. 22, 1955 2,714,569 Prindle Aug. 2, 1955 2,740,732 Peck Apr. 3, 1956 2,779,066 Gaugler Jan. 29, 1957

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Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004877A (en) * 1957-10-08 1961-10-17 Gen Electric Heat-insulating units for refrigerator cabinets
US3007621A (en) * 1958-07-03 1961-11-07 R C Can Co Disposable refill cartridge-tube for reloading grease dispensing guns
US3018016A (en) * 1959-09-24 1962-01-23 Nat Res Corp Vacuum device
US3066847A (en) * 1960-06-24 1962-12-04 Donald A Fortune Fire resistant envelope
US3072920A (en) * 1959-07-23 1963-01-15 John I Yellott Swimming pool cover for collection or reflection of solar heat
US3124853A (en) * 1964-03-17 Process for forming insulation and resulting product
US3162566A (en) * 1962-09-04 1964-12-22 Isadore H Katz Thermal insulating blanket for concrete curing
US3206345A (en) * 1961-12-18 1965-09-14 Gen Motors Corp Method and apparatus for making permanently sealed resilient insulation
US3231125A (en) * 1962-08-30 1966-01-25 Aerojet General Co Insulating material for vacuum insulating system
US3241702A (en) * 1959-04-13 1966-03-22 Union Carbide Corp Insulation construction for cryogenic containers
US3269422A (en) * 1963-01-09 1966-08-30 Moore & Co Samuel Composite tubing product and apparatus and method for manufacturing the same
US3357586A (en) * 1963-09-03 1967-12-12 Union Carbide Corp Apparatus for conserving and dispensing valuable materials
US3367530A (en) * 1963-08-29 1968-02-06 Union Carbide Corp Thermal insulating structure
US3383004A (en) * 1965-08-17 1968-05-14 Preload Co Inc Plastic storage tank
US3392865A (en) * 1965-10-29 1968-07-16 Nasa Usa Filament-wound container
US3400737A (en) * 1966-07-07 1968-09-10 Moore & Co Samuel Composite tubing product and apparatus for manufacturing the same
US3480464A (en) * 1964-09-21 1969-11-25 Dow Chemical Co Laminate material and method of making
US3546846A (en) * 1965-12-29 1970-12-15 Owens Corning Fiberglass Corp Method and apparatus for packaging fibrous material
US3695507A (en) * 1970-01-26 1972-10-03 Ronald G Sams Survival bag
US3913776A (en) * 1973-03-23 1975-10-21 British Oxygen Co Ltd Vacuum-insulated vessel
US4172915A (en) * 1978-07-31 1979-10-30 American Can Company Thermal insulation
US4183378A (en) * 1976-12-21 1980-01-15 Decker Bert J Light weight vacuum maintained structures
US4284674A (en) * 1979-11-08 1981-08-18 American Can Company Thermal insulation
US4700521A (en) * 1986-04-28 1987-10-20 Cover Craig H Multilayered insulation batt for building structures
US4901676A (en) * 1988-04-04 1990-02-20 Soltech, Inc. Sealing and insulation device for the space between spaced apart surfaces
US4974382A (en) * 1989-01-06 1990-12-04 Constructonika, Inc. Infiltration and energy barrier
US5007226A (en) * 1989-05-01 1991-04-16 Soltech, Inc. Insulated refrigerator door construction
US5018328A (en) * 1989-12-18 1991-05-28 Whirlpool Corporation Multi-compartment vacuum insulation panels
US5082335A (en) * 1989-12-18 1992-01-21 Whirlpool Corporation Vacuum insulation system for insulating refrigeration cabinets
US5091233A (en) * 1989-12-18 1992-02-25 Whirlpool Corporation Getter structure for vacuum insulation panels
US5330816A (en) * 1992-12-23 1994-07-19 Owens-Corning Fiberglas Technology Inc. High R super insulation panel
US5408832A (en) * 1992-06-08 1995-04-25 Saes Getters, S.P.A. Thermally insulating jacket and related process
US6109712A (en) * 1998-07-16 2000-08-29 Maytag Corporation Integrated vacuum panel insulation for thermal cabinet structures
EP1310751A2 (en) * 2001-11-09 2003-05-14 Whirlpool Corporation Domestic refrigerator with improved thermal insulation
US20060163395A1 (en) * 2002-08-06 2006-07-27 Akiko Yuasa Method for recycling thermal insulation material, recycled article and refrigerator
US20120198792A1 (en) * 2004-10-01 2012-08-09 Long Life S.R.L. Process for good packaging, namely food stuffs, packagings and kits for their realization
US20130094791A1 (en) * 2011-10-17 2013-04-18 Mark A. Aspenson Building insulation system
US20130193826A1 (en) * 2012-01-30 2013-08-01 Bsh Bosch Und Siemens Hausgerate Gmbh Household appliance, in particular dishwasher, with an acoustic sealing frame for noise reduction
US20150267959A1 (en) * 2014-03-21 2015-09-24 Samsung Electronics Co., Ltd. Gas barrier film, refrigerator having the same and method of manufacturing gas barrier film
US20170167782A1 (en) * 2015-12-09 2017-06-15 Whirlpool Corporation Insulating material with renewable resource component
US9688454B2 (en) 2014-08-05 2017-06-27 Sonoco Development, Inc. Double bag vacuum insulation panel for steam chest molding

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1637497A (en) * 1924-04-24 1927-08-02 Standard Gas Equipment Corp Heat-insulating unit
US1927879A (en) * 1931-11-16 1933-09-26 Wood Conversion Co Insulation slab
US2067015A (en) * 1931-03-03 1937-01-05 Termisk Isolation Ab Insulation
US2205778A (en) * 1932-08-26 1940-06-25 Westinghouse Electric & Mfg Co Refrigerator cabinet construction
US2382432A (en) * 1940-08-02 1945-08-14 Crown Cork & Seal Co Method and apparatus for depositing vaporized metal coatings
US2384500A (en) * 1942-07-08 1945-09-11 Crown Cork & Seal Co Apparatus and method of coating
US2602302A (en) * 1947-06-13 1952-07-08 Noel J Poux Combination ice and hot pack
US2672021A (en) * 1951-04-28 1954-03-16 Gen Motors Corp Defrosting refrigerating apparatus
US2699402A (en) * 1953-07-28 1955-01-11 Eastman Kodak Co Method for the manufacture of plastic articles having reflecting surfaces thereon
US2702580A (en) * 1954-04-06 1955-02-22 Du Pont Metallic finish laminated sheet material and process of making same
US2714569A (en) * 1952-01-18 1955-08-02 Dobeckmun Co Laminated thread
US2740732A (en) * 1951-07-16 1956-04-03 Sprague Electric Co Process of bonding a metal film to a thermoplastic sheet and resulting product
US2779066A (en) * 1952-05-23 1957-01-29 Gen Motors Corp Insulated refrigerator wall

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1637497A (en) * 1924-04-24 1927-08-02 Standard Gas Equipment Corp Heat-insulating unit
US2067015A (en) * 1931-03-03 1937-01-05 Termisk Isolation Ab Insulation
US1927879A (en) * 1931-11-16 1933-09-26 Wood Conversion Co Insulation slab
US2205778A (en) * 1932-08-26 1940-06-25 Westinghouse Electric & Mfg Co Refrigerator cabinet construction
US2382432A (en) * 1940-08-02 1945-08-14 Crown Cork & Seal Co Method and apparatus for depositing vaporized metal coatings
US2384500A (en) * 1942-07-08 1945-09-11 Crown Cork & Seal Co Apparatus and method of coating
US2602302A (en) * 1947-06-13 1952-07-08 Noel J Poux Combination ice and hot pack
US2672021A (en) * 1951-04-28 1954-03-16 Gen Motors Corp Defrosting refrigerating apparatus
US2740732A (en) * 1951-07-16 1956-04-03 Sprague Electric Co Process of bonding a metal film to a thermoplastic sheet and resulting product
US2714569A (en) * 1952-01-18 1955-08-02 Dobeckmun Co Laminated thread
US2779066A (en) * 1952-05-23 1957-01-29 Gen Motors Corp Insulated refrigerator wall
US2699402A (en) * 1953-07-28 1955-01-11 Eastman Kodak Co Method for the manufacture of plastic articles having reflecting surfaces thereon
US2702580A (en) * 1954-04-06 1955-02-22 Du Pont Metallic finish laminated sheet material and process of making same

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124853A (en) * 1964-03-17 Process for forming insulation and resulting product
US3004877A (en) * 1957-10-08 1961-10-17 Gen Electric Heat-insulating units for refrigerator cabinets
US3007621A (en) * 1958-07-03 1961-11-07 R C Can Co Disposable refill cartridge-tube for reloading grease dispensing guns
US3241702A (en) * 1959-04-13 1966-03-22 Union Carbide Corp Insulation construction for cryogenic containers
US3072920A (en) * 1959-07-23 1963-01-15 John I Yellott Swimming pool cover for collection or reflection of solar heat
US3018016A (en) * 1959-09-24 1962-01-23 Nat Res Corp Vacuum device
US3066847A (en) * 1960-06-24 1962-12-04 Donald A Fortune Fire resistant envelope
US3206345A (en) * 1961-12-18 1965-09-14 Gen Motors Corp Method and apparatus for making permanently sealed resilient insulation
US3231125A (en) * 1962-08-30 1966-01-25 Aerojet General Co Insulating material for vacuum insulating system
US3162566A (en) * 1962-09-04 1964-12-22 Isadore H Katz Thermal insulating blanket for concrete curing
US3269422A (en) * 1963-01-09 1966-08-30 Moore & Co Samuel Composite tubing product and apparatus and method for manufacturing the same
US3367530A (en) * 1963-08-29 1968-02-06 Union Carbide Corp Thermal insulating structure
US3357586A (en) * 1963-09-03 1967-12-12 Union Carbide Corp Apparatus for conserving and dispensing valuable materials
US3480464A (en) * 1964-09-21 1969-11-25 Dow Chemical Co Laminate material and method of making
US3383004A (en) * 1965-08-17 1968-05-14 Preload Co Inc Plastic storage tank
US3392865A (en) * 1965-10-29 1968-07-16 Nasa Usa Filament-wound container
US3546846A (en) * 1965-12-29 1970-12-15 Owens Corning Fiberglass Corp Method and apparatus for packaging fibrous material
US3400737A (en) * 1966-07-07 1968-09-10 Moore & Co Samuel Composite tubing product and apparatus for manufacturing the same
US3695507A (en) * 1970-01-26 1972-10-03 Ronald G Sams Survival bag
US3913776A (en) * 1973-03-23 1975-10-21 British Oxygen Co Ltd Vacuum-insulated vessel
US4183378A (en) * 1976-12-21 1980-01-15 Decker Bert J Light weight vacuum maintained structures
US4172915A (en) * 1978-07-31 1979-10-30 American Can Company Thermal insulation
US4284674A (en) * 1979-11-08 1981-08-18 American Can Company Thermal insulation
US4700521A (en) * 1986-04-28 1987-10-20 Cover Craig H Multilayered insulation batt for building structures
US4901676A (en) * 1988-04-04 1990-02-20 Soltech, Inc. Sealing and insulation device for the space between spaced apart surfaces
US4974382A (en) * 1989-01-06 1990-12-04 Constructonika, Inc. Infiltration and energy barrier
US5007226A (en) * 1989-05-01 1991-04-16 Soltech, Inc. Insulated refrigerator door construction
US5091233A (en) * 1989-12-18 1992-02-25 Whirlpool Corporation Getter structure for vacuum insulation panels
US5082335A (en) * 1989-12-18 1992-01-21 Whirlpool Corporation Vacuum insulation system for insulating refrigeration cabinets
US5018328A (en) * 1989-12-18 1991-05-28 Whirlpool Corporation Multi-compartment vacuum insulation panels
USRE42467E1 (en) 1992-06-08 2011-06-21 Saes Getters S.P.A. Thermally insulating jacket and related process
US5408832A (en) * 1992-06-08 1995-04-25 Saes Getters, S.P.A. Thermally insulating jacket and related process
US5330816A (en) * 1992-12-23 1994-07-19 Owens-Corning Fiberglas Technology Inc. High R super insulation panel
US6109712A (en) * 1998-07-16 2000-08-29 Maytag Corporation Integrated vacuum panel insulation for thermal cabinet structures
EP1310751A2 (en) * 2001-11-09 2003-05-14 Whirlpool Corporation Domestic refrigerator with improved thermal insulation
EP1310751A3 (en) * 2001-11-09 2003-10-01 Whirlpool Corporation Domestic refrigerator with improved thermal insulation
US20060163395A1 (en) * 2002-08-06 2006-07-27 Akiko Yuasa Method for recycling thermal insulation material, recycled article and refrigerator
US20120198792A1 (en) * 2004-10-01 2012-08-09 Long Life S.R.L. Process for good packaging, namely food stuffs, packagings and kits for their realization
US20130094791A1 (en) * 2011-10-17 2013-04-18 Mark A. Aspenson Building insulation system
US20130193826A1 (en) * 2012-01-30 2013-08-01 Bsh Bosch Und Siemens Hausgerate Gmbh Household appliance, in particular dishwasher, with an acoustic sealing frame for noise reduction
US9179817B2 (en) * 2012-01-30 2015-11-10 Bsh Hausgeraete Gmbh Household appliance, in particular dishwasher, with an acoustic sealing frame for noise reduction
US20150267959A1 (en) * 2014-03-21 2015-09-24 Samsung Electronics Co., Ltd. Gas barrier film, refrigerator having the same and method of manufacturing gas barrier film
US9688454B2 (en) 2014-08-05 2017-06-27 Sonoco Development, Inc. Double bag vacuum insulation panel for steam chest molding
US20170167782A1 (en) * 2015-12-09 2017-06-15 Whirlpool Corporation Insulating material with renewable resource component

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