US3264165A - Insulating means - Google Patents
Insulating means Download PDFInfo
- Publication number
- US3264165A US3264165A US413852A US41385264A US3264165A US 3264165 A US3264165 A US 3264165A US 413852 A US413852 A US 413852A US 41385264 A US41385264 A US 41385264A US 3264165 A US3264165 A US 3264165A
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- United States
- Prior art keywords
- gas
- insulating
- insulation
- film
- foam
- Prior art date
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- Expired - Lifetime
Links
- 238000009413 insulation Methods 0.000 claims description 24
- 239000011810 insulating material Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 12
- 239000006261 foam material Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 41
- 238000000576 coating method Methods 0.000 description 19
- 239000006260 foam Substances 0.000 description 18
- 239000011248 coating agent Substances 0.000 description 15
- 239000003365 glass fiber Substances 0.000 description 15
- 229920000642 polymer Polymers 0.000 description 15
- 239000011490 mineral wool Substances 0.000 description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 12
- 210000004027 cell Anatomy 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 11
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 8
- 230000001012 protector Effects 0.000 description 7
- 229920001169 thermoplastic Polymers 0.000 description 7
- 239000004416 thermosoftening plastic Substances 0.000 description 7
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 229920005830 Polyurethane Foam Polymers 0.000 description 5
- 239000011496 polyurethane foam Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 4
- 210000003850 cellular structure Anatomy 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 235000010269 sulphur dioxide Nutrition 0.000 description 3
- 239000004291 sulphur dioxide Substances 0.000 description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- KYVBNYUBXIEUFW-UHFFFAOYSA-N 1,1,3,3-tetramethylguanidine Chemical compound CN(C)C(=N)N(C)C KYVBNYUBXIEUFW-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- LZBCVRCTAYKYHR-UHFFFAOYSA-N acetic acid;chloroethene Chemical compound ClC=C.CC(O)=O LZBCVRCTAYKYHR-UHFFFAOYSA-N 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006263 elastomeric foam Substances 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 201000009032 substance abuse Diseases 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/001—Thermal insulation specially adapted for cryogenic vessels
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0304—Thermal insulations by solid means
- F17C2203/0329—Foam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0304—Thermal insulations by solid means
- F17C2203/0345—Fibres
- F17C2203/035—Glass wool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/911—Penetration resistant layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/231—Filled with gas other than air; or under vacuum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/233—Foamed or expanded material encased
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249954—With chemically effective material or specified gas other than air, N, or carbon dioxide in void-containing component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/24999—Inorganic
Definitions
- This Iinvention relates to improved insulating means. It has been recognized that certain gases with inherently low coefficients of heat transmission after displacing air from insulating materials will substantially increase the insulating properties of good insulating material such as glass fibers or mineral wool. However, it has been difiicult to provide for permanently enclosing such gases in the glass fibers or mineral wool. It has also been difficult to prevent the leakage of such gases and to prevent the puncturing of the enclosure during the handling of it afterward. Various means have often been proposed for accommodating the expansion and contraction of the gas during extreme changes lin temperature and also in barometric pressure.
- thermoplastic film formed of sheets :located on the opposite faces of the protection strips 'with the protruding edges heat sea-led together to complete the enclosure.
- the entire interior of the thermoplastic film enclosure containing the protective strips and the piece of glass fibers or mineral wool ⁇ is provided with a gas having a low coefficient of heat transmission which is substantially permanently contained therein.
- the entire outer surface of the film is provided with a thick coating of a closed cell substantially impervious resilient foamed polymer preferably also substantially permanently containing a gas having a low coefiicien-t of heat transmission.
- the interior is similar, but the thermoplastic film is provided with a vapor deposited film of a suitable metal such as aluminum.
- the closed cell substantially impervious resilient foamed polymer containing a gas having a low coefficient of heat transmission is provided in a thick coating over the thin metal film.
- a sealing coating of organic resin is applied over the foamed polymer and a second metal film similar to the first may be applied over the sealing coating.
- a second sealing coating of a suitable organic resin such as polyethylene.
- the interior of the second form contains glass fibers or mineral wool and a protective strip on opposite sides of the glass fiber or mineral wool and also contains a gas having a low coefficient of heat transmission.
- the metal films as well as the sealing coatings for the foam polymer substantially prevent the escape of any of the insulating gas for an extremely long period.
- FIGURE 1 is a diagrammatic ⁇ transverse sectional View of the first form of insulating means embodying my invention
- FIGURE 2 is a diagrammatic transverse sectional view of the second form of insulating means embodying lmy invention.
- FIGURE 1 shows an insulation package in which there is a piece 34 in the form of a rectangular slab of glass fibers or mineral wool.
- Some glass fibers and mineral wool contain sharp needle-like pieces which may puncture the enclosing -thermoplastic film or sheet.
- the assembly of the glass fiber or mineral wool piece 34 and the protective sheets 56 and 60 is enclosed on opposite sides by sheets 50 and 62 of heat sealable thermoplastic film or sheet which are heat sealed together at all their edges 61 to complete the enclosure.
- Examples of such film or sheet are one or more layers of vinylidene chloride sheet or a copolymer of vinyl chloride and vinyl chloride acetate or a copolymer of vinyl chloride and vinylidene chloride or a polyester of ethylene glycol and terephthalic acid.
- the air within the enclosure provided by the sheets 50 and 62 is preferably replaced by a gas having a low coefficient of heat transmission such as difiuorodichloromethane or sulphur dioxide.
- this film is protected by a thick outer coating 177 of a flexible resilient closed cell substantially impervious foamed polymer directly adherent to the film.
- This foamed polymer contains in its cells a gas having a low coefficient of heat transmission.
- the foam polymer 177 is of the polyurethane type and contains as the insulating gas monofiuorotrichloromethane.
- a flexible closed cell substantially impervious foam polymer such as the foam polymer 177
- foam polymer 177 there is supplied for one component f' A in parts by weight a mixture of 44 parts of toluene diisocyanate and l5 parts of monofiuorotrichloromethane.
- the toluene diisocyanate consists of a mixture of parts 2,4 toluene diisocyanate and 2O parts of 2,6 toluene diisocyanate.
- the second resin component B lthere is provided a mixture in parts by weight of 9() parts castor oil, l0 parts of distilled tall oil and 3 parts catalysts including one half part of N-ethyl morpholene, .2 part stannous octoate, 1.0 part of tetramethylguanidine.
- the resin component B also includes a surfactant in the amount of 1.5 parts of organosiloxane.
- the foam 177 protects the film 50, 62 from being punctured by external means and in addition seals the film to further prevent the escape of the gas therein having the low coefficient of heat transmission and also prevents the ingress of air thereto. It makes it possible for the package to withstand the normal abuses imposed during handling which was a problem with film enclosed insulation.
- the cellular structure of the foam is especially effective in sealing any minute holes which may be present in the film.
- the cellular structure of the foam also makes it effective in preventing cutting and penetration by sharp objects.
- the cellular structure of the foam and the presence of the insulating gas in the foam have sufficient insulating properties to minimize the effect of external temperature changes on the gas in the interior of the film and thereby minimizes consequent changes of the pressure of the gas therein.
- the resiliency of the cellular structure makes it possible to expand and contract to fill voids in the insulation space and to absorb increases in pressure of the gas during contraction and expansion of the insulation gas within to ll any voids in the insulation space within which the package may be lodged.
- the second form of the invention embodies an insulation package shown in FIGURE 2 in which there is a fiat rectangular piece of glass fibers or mineral wool 134. As in FIGURE 1, this piece 134 is covered on its upper and lower faces by a lower protector sheet 156 and an upper protector sheet 160 of open cell elastomeric foam or kraft paper. These protector sheets prevent the possibility that some sharp needle-like piece within the glass fibers or mineral wool 134 will puncture the enclosing film. As in FIGURE l, the assembly of the piece of glass fibers or mineral wool 134 and the protector sheets 156 and 160 is enclosed by lower and upper sheets 150 and 162 of a thin thermoplastic film.
- This film is preferably made up of one or more layers of vinylidene chloride sheet r other heat sealable films or sheets such as vinyl chloride-acetate copolymer or a copolymer of vinyl chloride and vinylidene chloride or a polyester of ethylene glycol and terephthalic acid.
- the latter sheet material is preferred and preferably is provided with a thin vapor deposited coa-ting 163 of aluminum over its entire surface.
- a gas having a low coefficient of heat transmission such as difiuorodichloromethane or sulphur dioxide.
- the edges 161 are also heat sealed together completely around the assembly of the piece 134 and the protector sheets 156 and 160 before the vapor deposited metal film is applied.
- the vapor deposited metal film substantially improves the holding of the insulating gas within the interior and therefore prolongs the effectiveness of the insulation. Where the useful life of the structure in which the insulation package is to be used is relatively short, the metal coating 163 may be omitted.
- the specific example may be the same as that set forth for the coating or layer 177 in FIGURE 1 and performs the same functions.
- foam polymer 176 While this foam polymer is capable of retaining the gas in its cells for a long period of time, there is a tendency for its effectiveness to be reduced gradually by penetration by moisture vapor and air.
- I provide the foam polymer 176 with a thin flexible external coating 178 of polyvinyl alcohol or a polyester of ethylene glycol and terephthalic acid.
- I provide a second vapor deposited very thin flexible film 180 of aluminum to the external surface of the plastic resin 178. This film 180 may be omitted where some loss of insulating efficiency after a long time is not important.
- I provide an outer coa-ting 182 of either polyethylene or a polyester of ethylene glycol and terephthalic acid. These outer coatings and films are sufficiently thin and flexible that they do not substantially interfere with the iiexibility and resiliency of the much thicker cellular layer 17 6 which is composed -of the foam polymer.
- the external coatings provided make practical this gas lled type of insulation since it is possible for the insulation package to be readily handled without substantial danger of cutting or puncturing the sealing enclosure so that the escape of the gas is permanently prevented.
- the resiliency and toughness of the coatings 178 and 182 on the outside of the foam polymer 176 add to the effectiveness in preventing cutting and puncturing and also abrasion.
- the package may be made inexpensively through the use of automatic machinery as illustra-ted in my copending application S.N. 160,009 filed December 18, 1961.
- the package may be applied to the interior of the hollow walls of refrigerators or other insulating structures such as insulated trucks and refrigerator cars.
- the foam layer can be compressed during periods of high pressure of the gas within the in-terior of the package to prevent excessive pressures therein and it may expand during periods of low pressure resulting from cold temperatures to ll any voids in the insulation space,
- this resilient foam layer is capable of application to wider changes in temperature than packages enclosed solely in solid films.
- Insulation comprising a resilient permeable insulating material containing a gas having god insulating properties, a sealed bag of thin flexible material enclosing said insulating material and sealing said gas in the insulating material, and a resilient foam material bonded t0 the entire outer surfaces of said bag and completely enclosing the outer surfaces of said bag.
- Insulation comprising a resilient permeable insulating material containing a gas having good insulating properties, a sealed bag 0f thin flexible material enclosing said insulating material and sealing said gas in the insulating material, and a resilient foam material bonded to and completely enclosing the outer surfaces of said bag, said foam material containing a preponderance of closed cells containing a gas having good insulating properties.
- Insulation comprising a resilient permeable insulating material in the form of a relatively thick sheet of extensive area containing a gas having good insulating properies, protector sheeting provided upon opposite sides of said resilient insulating material, a sealed bag of thin flexible material enclosing said insulating material and said protector sheeting land sealing said gas in the insulating material, and a foam material bonded to the entire outer surfaces of said bag.
- Insulation comprising a resilient permeable insulating material containing a gas having good insulating properties, a 'sealed bag of thin flexible material enclosing said insulating material and sealing said gas in the insulating material, and a polyurethane foam material bonded to and surrounding and completely enclosing and protecting the entire outer surfaces of said sealed bag.
- E e 6 Insulation comprising a thick rectangular resilient References Cited by the Examiner permeable insulation material containing a gas having good insulating properties, a sealed bag of insulating ma- UNITED STATES PATENTS teria] enclosing and extending throughout both sides 2,742,385 4/ 1956 Bovenkerk 161-407 and all the edges of said insulating material and sealing 5 2,817,124 12/ 1957 Dybvig 52-406 the gas in the insulating material, and a foam material 2,869,336 1/1959 Smidl 52 404 extending continuously over and completely enclosing the outer surfaces of said bag and being bonded continuously RICHARD W COOKE, JR Primary Examle,.
Description
AUSL 2, 1966 c. A. STICKEL" 3,264,165
INSULATING MEANS Filed NOV. 25, 1964 U. Ar 'fl -4- .an .I .-7 .YAY -lr 4 1. ORGANIC RESIN GLASS FIBERS AND INSULATING GAS METAL FILM PO LYVI NYL ALCOHOL POLYUR ETHANE FOAM CONTAINING INSULATING GAS METAL FL"l PO LYETH YL EN E.
United States Patent O 3,264,165 INSULATING MEANS Carl A. Stckel, Dayton, Ohio, assigner to General Motors Corporation, Detroit, Mich., a corporation of Delaware Filed Nov. 25, 1964, Ser. No. 413,852 8 Claims. (Cl. 161-43) This application is a continuation-in-part of my copending application SLN. 160,009 filed December 18, 1961 now Patent No. 3,206,345.
This Iinvention relates to improved insulating means. It has been recognized that certain gases with inherently low coefficients of heat transmission after displacing air from insulating materials will substantially increase the insulating properties of good insulating material such as glass fibers or mineral wool. However, it has been difiicult to provide for permanently enclosing such gases in the glass fibers or mineral wool. It has also been difficult to prevent the leakage of such gases and to prevent the puncturing of the enclosure during the handling of it afterward. Various means have often been proposed for accommodating the expansion and contraction of the gas during extreme changes lin temperature and also in barometric pressure.
It is an object of my invention to provide a permanently sealed resilient insulation containing a gas having a low coefiicient of heat transmission.
It is another object of my invention to provide a simple improved means having high insulating value for protecting the enclosure of the sealed resilient insulation from puncture and leakage during processing and subsequent handling and also to accommodate the expansion and contraction of the gas sealed therein.
These and other objects are attained in the first form shown in the drawings in which a piece of glass fiber or mineral wool is provided on its opposite faces with the protective strips of open cell foam or paper. This assembly is enclosed in a thermoplastic film formed of sheets :located on the opposite faces of the protection strips 'with the protruding edges heat sea-led together to complete the enclosure. The entire interior of the thermoplastic film enclosure containing the protective strips and the piece of glass fibers or mineral wool `is provided with a gas having a low coefficient of heat transmission which is substantially permanently contained therein. To seal and protect the film and to provide a resilient outer layer, the entire outer surface of the film is provided with a thick coating of a closed cell substantially impervious resilient foamed polymer preferably also substantially permanently containing a gas having a low coefiicien-t of heat transmission.
In the second form of the invention the interior is similar, but the thermoplastic film is provided with a vapor deposited film of a suitable metal such as aluminum. The closed cell substantially impervious resilient foamed polymer containing a gas having a low coefficient of heat transmission is provided in a thick coating over the thin metal film. A sealing coating of organic resin is applied over the foamed polymer and a second metal film similar to the first may be applied over the sealing coating. Over the second metal film is a second sealing coating of a suitable organic resin such as polyethylene. The interior of the second form contains glass fibers or mineral wool and a protective strip on opposite sides of the glass fiber or mineral wool and also contains a gas having a low coefficient of heat transmission. The metal films as well as the sealing coatings for the foam polymer substantially prevent the escape of any of the insulating gas for an extremely long period.
Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein pre- ICC ferred embodiments of the present invention are clearly shown.
In the drawings:
FIGURE 1 `is a diagrammatic `transverse sectional View of the first form of insulating means embodying my invention;
FIGURE 2 is a diagrammatic transverse sectional view of the second form of insulating means embodying lmy invention.
FIGURE 1 shows an insulation package in which there is a piece 34 in the form of a rectangular slab of glass fibers or mineral wool. Some glass fibers and mineral wool contain sharp needle-like pieces which may puncture the enclosing -thermoplastic film or sheet. To avoid this possibility of puncturing provided such materials are used, I provide on opposite sides of the glass fiber or mineral wool 34 upper and lower sheets 60 and 56 of thin open -cell foam elastomeric sheeting or craft paper of substantially the same width as the glass fibers or mineral wool piece 34. The assembly of the glass fiber or mineral wool piece 34 and the protective sheets 56 and 60 is enclosed on opposite sides by sheets 50 and 62 of heat sealable thermoplastic film or sheet which are heat sealed together at all their edges 61 to complete the enclosure. Examples of such film or sheet are one or more layers of vinylidene chloride sheet or a copolymer of vinyl chloride and vinyl chloride acetate or a copolymer of vinyl chloride and vinylidene chloride or a polyester of ethylene glycol and terephthalic acid. The air within the enclosure provided by the sheets 50 and 62 is preferably replaced by a gas having a low coefficient of heat transmission such as difiuorodichloromethane or sulphur dioxide.
According to my invention, this film is protected by a thick outer coating 177 of a flexible resilient closed cell substantially impervious foamed polymer directly adherent to the film. This foamed polymer contains in its cells a gas having a low coefficient of heat transmission. Preferably the foam polymer 177 is of the polyurethane type and contains as the insulating gas monofiuorotrichloromethane.
As one example of materials forming a flexible closed cell substantially impervious foam polymer, such as the foam polymer 177, there is supplied for one component f' A in parts by weight a mixture of 44 parts of toluene diisocyanate and l5 parts of monofiuorotrichloromethane. The toluene diisocyanate consists of a mixture of parts 2,4 toluene diisocyanate and 2O parts of 2,6 toluene diisocyanate. For the second resin component B, lthere is provided a mixture in parts by weight of 9() parts castor oil, l0 parts of distilled tall oil and 3 parts catalysts including one half part of N-ethyl morpholene, .2 part stannous octoate, 1.0 part of tetramethylguanidine. The resin component B also includes a surfactant in the amount of 1.5 parts of organosiloxane. These components are mixed and sprayed onto the entire outer surface of the films 50 and 62 in sufficient thickness to provide .a thick protective coating of the films sufiicient to protect the film from puncturing, tearing and abrasion during handling and installation.
It should be understood that it is especially important to protect the film 5t), 62 from being punctured by external means since the loss of the insulating gas, difiuorodichloromethane or sulphur dioxide, from the interior greatly reduces the insulating properties of the package. The foam 177 protects the film 50, 62 from being punctured by external means and in addition seals the film to further prevent the escape of the gas therein having the low coefficient of heat transmission and also prevents the ingress of air thereto. It makes it possible for the package to withstand the normal abuses imposed during handling which was a problem with film enclosed insulation.
The cellular structure of the foam is especially effective in sealing any minute holes which may be present in the film. The cellular structure of the foam also makes it effective in preventing cutting and penetration by sharp objects. The cellular structure of the foam and the presence of the insulating gas in the foam have sufficient insulating properties to minimize the effect of external temperature changes on the gas in the interior of the film and thereby minimizes consequent changes of the pressure of the gas therein. The resiliency of the cellular structure makes it possible to expand and contract to fill voids in the insulation space and to absorb increases in pressure of the gas during contraction and expansion of the insulation gas within to ll any voids in the insulation space within which the package may be lodged.
The second form of the invention embodies an insulation package shown in FIGURE 2 in which there is a fiat rectangular piece of glass fibers or mineral wool 134. As in FIGURE 1, this piece 134 is covered on its upper and lower faces by a lower protector sheet 156 and an upper protector sheet 160 of open cell elastomeric foam or kraft paper. These protector sheets prevent the possibility that some sharp needle-like piece within the glass fibers or mineral wool 134 will puncture the enclosing film. As in FIGURE l, the assembly of the piece of glass fibers or mineral wool 134 and the protector sheets 156 and 160 is enclosed by lower and upper sheets 150 and 162 of a thin thermoplastic film. This film is preferably made up of one or more layers of vinylidene chloride sheet r other heat sealable films or sheets such as vinyl chloride-acetate copolymer or a copolymer of vinyl chloride and vinylidene chloride or a polyester of ethylene glycol and terephthalic acid. The latter sheet material is preferred and preferably is provided with a thin vapor deposited coa-ting 163 of aluminum over its entire surface. However, prior to this deposition of the metal film the interior of the enclosure is evacuated and charged with a gas having a low coefficient of heat transmission such as difiuorodichloromethane or sulphur dioxide. The edges 161 are also heat sealed together completely around the assembly of the piece 134 and the protector sheets 156 and 160 before the vapor deposited metal film is applied.
The vapor deposited metal film substantially improves the holding of the insulating gas within the interior and therefore prolongs the effectiveness of the insulation. Where the useful life of the structure in which the insulation package is to be used is relatively short, the metal coating 163 may be omitted.
According to my invention to protect the enclosure from puncturing and tearing and to seal the thermoplastic film and to hold and protect the metal film, I apply a thick coating 176 of a resilient elastic flexible closed cell substantially impervious foamed polymer of the polyurethane type, preferably containing in the cells thereof a gas such as monouorotrichloromethane having a low coefficient of heat transmission. The specific example may be the same as that set forth for the coating or layer 177 in FIGURE 1 and performs the same functions.
While this foam polymer is capable of retaining the gas in its cells for a long period of time, there is a tendency for its effectiveness to be reduced gradually by penetration by moisture vapor and air. To prolong the insulation properties of the foam polymer, I provide the foam polymer 176 with a thin flexible external coating 178 of polyvinyl alcohol or a polyester of ethylene glycol and terephthalic acid. To provide additional gas sealing properties I provide a second vapor deposited very thin flexible film 180 of aluminum to the external surface of the plastic resin 178. This film 180 may be omitted where some loss of insulating efficiency after a long time is not important. To protect the metal film 180 from puncturing and abrasion, and to protect the polyvinyl alcohol coating from contact with moisture, I provide an outer coa-ting 182 of either polyethylene or a polyester of ethylene glycol and terephthalic acid. These outer coatings and films are sufficiently thin and flexible that they do not substantially interfere with the iiexibility and resiliency of the much thicker cellular layer 17 6 which is composed -of the foam polymer.
The external coatings provided make practical this gas lled type of insulation since it is possible for the insulation package to be readily handled without substantial danger of cutting or puncturing the sealing enclosure so that the escape of the gas is permanently prevented. The resiliency and toughness of the coatings 178 and 182 on the outside of the foam polymer 176 add to the effectiveness in preventing cutting and puncturing and also abrasion. The package may be made inexpensively through the use of automatic machinery as illustra-ted in my copending application S.N. 160,009 filed December 18, 1961. The package may be applied to the interior of the hollow walls of refrigerators or other insulating structures such as insulated trucks and refrigerator cars. The foam layer can be compressed during periods of high pressure of the gas within the in-terior of the package to prevent excessive pressures therein and it may expand during periods of low pressure resulting from cold temperatures to ll any voids in the insulation space, Thus the insulation package by the provision of this resilient foam layer is capable of application to wider changes in temperature than packages enclosed solely in solid films.
While the embodiments of the present invention as herein disclosed constitute preferred forms, it is to be understood that other forms might be adopted.
What is claimed is as follows:
1. Insulation comprising a resilient permeable insulating material containing a gas having god insulating properties, a sealed bag of thin flexible material enclosing said insulating material and sealing said gas in the insulating material, and a resilient foam material bonded t0 the entire outer surfaces of said bag and completely enclosing the outer surfaces of said bag.
2. Insulation comprising a resilient permeable insulating material containing a gas having good insulating properties, a sealed bag 0f thin flexible material enclosing said insulating material and sealing said gas in the insulating material, and a resilient foam material bonded to and completely enclosing the outer surfaces of said bag, said foam material containing a preponderance of closed cells containing a gas having good insulating properties.
3. Insulation comprising a resilient permeable insulating material in the form of a relatively thick sheet of extensive area containing a gas having good insulating properies, protector sheeting provided upon opposite sides of said resilient insulating material, a sealed bag of thin flexible material enclosing said insulating material and said protector sheeting land sealing said gas in the insulating material, and a foam material bonded to the entire outer surfaces of said bag.
4. Insulation comprising a resilient permeable insulating material containing a gas having good insulating properties, a 'sealed bag of thin flexible material enclosing said insulating material and sealing said gas in the insulating material, and a polyurethane foam material bonded to and surrounding and completely enclosing and protecting the entire outer surfaces of said sealed bag.
5. Insulation as specified in claim 4 in which the polyurethane foam material is substantially impervious and has a preponderance of closed cells containing an insulating gas.
6. Insulation as specified in claim 4 in which the polyurethane foam material has an external sealing coating.
7. Insulation as specified in claim 4 in which the polyurethane foam material has an external sealing coating having a layer of organic resin on opposite sides of a metal film.
E e 6 8. Insulation comprising a thick rectangular resilient References Cited by the Examiner permeable insulation material containing a gas having good insulating properties, a sealed bag of insulating ma- UNITED STATES PATENTS teria] enclosing and extending throughout both sides 2,742,385 4/ 1956 Bovenkerk 161-407 and all the edges of said insulating material and sealing 5 2,817,124 12/ 1957 Dybvig 52-406 the gas in the insulating material, and a foam material 2,869,336 1/1959 Smidl 52 404 extending continuously over and completely enclosing the outer surfaces of said bag and being bonded continuously RICHARD W COOKE, JR Primary Examle,.
to the entire outer surfaces of both sides and all the edges o'f said bag, 10 JOHN E. MURTAGH, Assistant Examiner.
Claims (1)
1. INSULATION COMPSIRING A RESILIENT PERMEABLE INSULATING MATERIAL CONTAINING A GAS GOD INSULATING PROPERTIES, A SEALED BAG OF THIN FLEXIBLE MATERIAL ENCLOSING SAID INSULATING MATERIAL AND SEALING SAID GAS IN THE INSULATING MATERIAL, AND A RESILIENT FOAM MATERIAL BONDED TO THE ENTIRE OUTER SURFACES OF SAID BAG AND COMPLETELY ENCLOSING THE OUTER SURFACES OF SAID BAG.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US413852A US3264165A (en) | 1964-11-25 | 1964-11-25 | Insulating means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US413852A US3264165A (en) | 1964-11-25 | 1964-11-25 | Insulating means |
Publications (1)
Publication Number | Publication Date |
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US3264165A true US3264165A (en) | 1966-08-02 |
Family
ID=23638929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US413852A Expired - Lifetime US3264165A (en) | 1964-11-25 | 1964-11-25 | Insulating means |
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US (1) | US3264165A (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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US3420022A (en) * | 1966-09-20 | 1969-01-07 | Wayne C Brock | Concrete insulation blanket |
USRE29851E (en) * | 1970-03-19 | 1978-11-28 | Insulating flexible composite element and purge system | |
US3991531A (en) * | 1970-06-25 | 1976-11-16 | Otto Alfred Becker | Composite wall element for thermal and acoustic insulation |
US3917471A (en) * | 1971-03-18 | 1975-11-04 | Otto Alfred Becker | Insulating flexible composite element and purge system |
USRE29517E (en) * | 1971-06-25 | 1978-01-17 | Composite wall element for thermal and acoustic insulation | |
US3803784A (en) * | 1971-06-25 | 1974-04-16 | O Becker | Composite wall element for thermal and acoustic insulation |
US3818664A (en) * | 1973-02-08 | 1974-06-25 | Rockwell International Corp | Insulated tank base and insulated block |
US4136203A (en) * | 1976-07-08 | 1979-01-23 | Swift & Company | Meat packaging |
US4136205A (en) * | 1977-03-30 | 1979-01-23 | W. R. Grace & Co. | Container and method for packaging meat articles |
US4297820A (en) * | 1977-12-05 | 1981-11-03 | Covington Brothers Technologies | Composite structural panel with multilayered reflective core |
US4350724A (en) * | 1978-05-08 | 1982-09-21 | Marrs Ralph E | Acoustic energy systems |
US4172915A (en) * | 1978-07-31 | 1979-10-30 | American Can Company | Thermal insulation |
US4282276A (en) * | 1978-08-28 | 1981-08-04 | Smith Stuart B | Thermal insulation packet |
US4213280A (en) * | 1978-09-06 | 1980-07-22 | Novaro Investments Limited | Modular unit for the construction of floating decks of liquid storage tanks |
FR2445926A1 (en) * | 1979-01-08 | 1980-08-01 | Sandborn Edmund | Floating apron for controlling evapn. in storage tanks - is mfd. from corrosion resistant, non-submersible, impermeable modules with foam plastic core in plastic-covered flexible metal envelope |
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US4267960A (en) * | 1979-08-29 | 1981-05-19 | American Can Company | Bag for vacuum packaging of meats or similar products |
US4284674A (en) * | 1979-11-08 | 1981-08-18 | American Can Company | Thermal insulation |
US4340630A (en) * | 1980-04-04 | 1982-07-20 | Doty Francis D | Low conductivity gas sealed building insulation |
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JPS5796852A (en) * | 1980-12-09 | 1982-06-16 | Matsushita Electric Ind Co Ltd | Heat insulating material |
JPS6117263B2 (en) * | 1980-12-09 | 1986-05-07 | Matsushita Denki Sangyo Kk | |
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US4399645A (en) * | 1980-12-15 | 1983-08-23 | Lou Weitz | Bladder insulation |
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US4459789A (en) * | 1982-05-20 | 1984-07-17 | Ford Donald F | Window |
EP0099574A3 (en) * | 1982-07-20 | 1985-08-14 | Matsushita Electric Industrial Co., Ltd. | Composite thermal insulator |
EP0099574A2 (en) * | 1982-07-20 | 1984-02-01 | Matsushita Electric Industrial Co., Ltd. | Composite thermal insulator |
US4492725A (en) * | 1982-07-20 | 1985-01-08 | Matsushita Electric Industrial Co., Ltd. | Composite thermal insulator |
US4444821A (en) * | 1982-11-01 | 1984-04-24 | General Electric Company | Vacuum thermal insulation panel |
US4534984A (en) * | 1983-08-16 | 1985-08-13 | W. R. Grace & Co., Cryovac Div. | Puncture-resistant bag and method for vacuum packaging bone-in meat |
EP0181778A2 (en) * | 1984-11-13 | 1986-05-21 | Nippon Sanso Kabushiki Kaisha | Evacuated heat insulation unit and method of manufacturing same |
EP0181778A3 (en) * | 1984-11-13 | 1987-07-29 | Nippon Sanso Kabushiki Kaisha | Evacuated heat insulation unit and method of manufacturing same |
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EP0263511A3 (en) * | 1986-10-08 | 1988-08-24 | Union Carbide Corporation | Vacuum insulation panel |
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US4901676A (en) * | 1988-04-04 | 1990-02-20 | Soltech, Inc. | Sealing and insulation device for the space between spaced apart surfaces |
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