JPH0820176B2 - Manufacturing method of heat insulation box - Google Patents
Manufacturing method of heat insulation boxInfo
- Publication number
- JPH0820176B2 JPH0820176B2 JP26451787A JP26451787A JPH0820176B2 JP H0820176 B2 JPH0820176 B2 JP H0820176B2 JP 26451787 A JP26451787 A JP 26451787A JP 26451787 A JP26451787 A JP 26451787A JP H0820176 B2 JPH0820176 B2 JP H0820176B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon dioxide
- urethane foam
- dioxide gas
- box
- rigid urethane
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000009413 insulation Methods 0.000 title description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 70
- 239000006260 foam Substances 0.000 claims description 36
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 35
- 239000001569 carbon dioxide Substances 0.000 claims description 35
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000003463 adsorbent Substances 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 10
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 2
- 229910000000 metal hydroxide Inorganic materials 0.000 claims 1
- 150000004692 metal hydroxides Chemical class 0.000 claims 1
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 description 10
- 239000002994 raw material Substances 0.000 description 6
- JLGADZLAECENGR-UHFFFAOYSA-N 1,1-dibromo-1,2,2,2-tetrafluoroethane Chemical compound FC(F)(F)C(F)(Br)Br JLGADZLAECENGR-UHFFFAOYSA-N 0.000 description 5
- 241001494479 Pecora Species 0.000 description 3
- 241000533293 Sesbania emerus Species 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BOSAWIQFTJIYIS-UHFFFAOYSA-N 1,1,1-trichloro-2,2,2-trifluoroethane Chemical compound FC(F)(F)C(Cl)(Cl)Cl BOSAWIQFTJIYIS-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- -1 trichlorotolylfluoroethane Chemical compound 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Refrigerator Housings (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、冷蔵庫，冷凍庫等に用いる断熱箱体の製造
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat insulating box used for a refrigerator, a freezer, or the like.
従来の技術 近年、省エネルギーの観点より発泡断熱材の熱伝導率
を低減し、断熱性を向上させることが強く望まれてい
る。このため代表的な発泡断熱材である硬質ウレタンフ
ォームの製造にあたっては、主原料として用いるポリエ
ーテルポリオール及びイソシアネート，助剤原料として
用いる整泡剤，触媒，発泡剤に外し、原料面から種々の
改善取組みがなされている。このような取組みにおいて
特に硬質ウレタンフォームの熱伝導率を低減するには、
気泡中のガス成分の気体熱伝導率を改善することが重要
であり、特に発泡剤としてトリクロロフィオロメタン
（以下Ｒ−11と称す）を用い、Ｒ−11ガスでフォーム気
泡中を満たすことが不可欠であった。2. Description of the Related Art In recent years, from the viewpoint of energy saving, it has been strongly desired to reduce the thermal conductivity of the foamed heat insulating material and improve the heat insulating property. Therefore, in the production of rigid urethane foam, which is a typical foam insulation material, various improvements have been made from the raw material side by removing the polyether polyol and isocyanate used as the main raw materials, the foam stabilizer, the catalyst, and the foaming agent used as the auxiliary raw materials. Efforts are being made. In order to reduce the thermal conductivity of rigid urethane foam especially in such efforts,
It is important to improve the gas thermal conductivity of the gas component in the bubbles, and especially it is essential to use trichlorofioromethane (hereinafter referred to as R-11) as a blowing agent and fill the foam bubbles with R-11 gas. Met.
しかしながら、ウレタンフォーム原料中の残留水分や
断熱箱体に注入する時点での吸湿により、原料系中に含
まれる水分が、イソシアネートと反応し、発生した炭酸
ガスがフォーム気泡中に含まれる現象を避けることがで
きなかった。Ｒ−11のガス熱伝導率が、0.0067kcal/mhr
℃であるのに対し、炭酸ガスのガス熱伝導率は0.0125kc
al/mhr℃と大きく、気体熱伝導率を改善し、フォームの
熱伝導率を向上していく上で炭酸ガスの存在が大きな問
題であった。However, avoid the phenomenon that the moisture contained in the raw material system reacts with the isocyanate due to the residual moisture in the urethane foam raw material or the moisture absorption at the time of injecting it into the heat insulation box, and the generated carbon dioxide gas is contained in the foam bubbles. I couldn't. The gas thermal conductivity of R-11 is 0.0067kcal / mhr
℃, the thermal conductivity of carbon dioxide is 0.0125kc
The presence of carbon dioxide gas was a major problem in improving the thermal conductivity of the foam and the thermal conductivity of the foam.
従来、系中から発生する炭酸ガスの除去に対しては例
えば、実公昭53−36297号公報に示されるような方法が
提案されている。この実公昭53−36297号公報を説明す
ると密閉容器中に充填したコーヒー豆から発生する炭酸
ガスを密閉容器中に同封したモレキュラシープスにより
吸着させ、除去することが特徴となっている。Conventionally, for the removal of carbon dioxide gas generated from the system, for example, a method disclosed in Japanese Utility Model Publication No. Sho 53-36297 has been proposed. This Japanese Utility Model Publication No. 53-36297 is characterized in that carbon dioxide gas generated from coffee beans filled in a closed container is adsorbed and removed by the molecular sheep enclosed in the closed container.
発明が解決しようとする問題点 しかし、コーヒー豆のように充填空間のあるものにつ
いては、発生した炭酸ガスが空隙を移動して炭酸ガス吸
着剤であるモレキュラシープスに吸着されるための問題
はないが、硬質ウレタンフォームでは炭酸ガス吸着剤を
埋設しても気泡が独立気泡であるため炭酸ガスの移動は
遅く、製造時から実使用までの期間で吸着できないとい
う問題があった。第４図で説明すると、１は断熱箱体で
鉄板からなる外箱２とプラスチック製の内箱3,及び外箱
２と内箱３間に一体発泡してなる硬質ウレタンフォーム
４から構成されている。５は通気性を有する袋６に充填
したモレキュラシープス（東洋曹達製9F）で、あらかじ
め、外箱２と内箱３間に配設し、一体発泡したものであ
る。Problems to be Solved by the Invention However, for coffee beans having a filling space such as coffee beans, there is a problem that the generated carbon dioxide gas migrates through the voids and is adsorbed by the molecular sheep which is a carbon dioxide gas adsorbent. However, the rigid urethane foam has a problem that even if a carbon dioxide gas adsorbent is embedded, the bubbles are closed cells, so that the movement of carbon dioxide gas is slow and the carbon dioxide gas cannot be adsorbed during the period from the production to the actual use. Referring to FIG. 4, reference numeral 1 denotes a heat-insulating box, which is composed of an outer box 2 made of an iron plate, a plastic inner box 3, and a rigid urethane foam 4 integrally foamed between the outer box 2 and the inner box 3. There is. 5 is a molecular sheep (9F made by Toyo Soda Co., Ltd.) filled in a breathable bag 6, which is previously disposed between the outer box 2 and the inner box 3 and integrally foamed.
このような構成においては、気泡中に含まれる炭酸ガ
スは、独立気泡体である硬質ウレタンフォーム４の気抱
膜に阻害されて、拡散速度が遅くまた吸着面積が非常に
狭く、容易にモレキュラシーブス５に到達しないという
現象があった。In such a structure, the carbon dioxide gas contained in the bubbles is obstructed by the air bearing film of the rigid urethane foam 4 which is a closed cell, and the diffusion rate is slow and the adsorption area is very narrow, so that the molecular sieves can be easily absorbed. There was a phenomenon that it did not reach 5.
このため断熱箱体１の製造から実使用までの期間におい
て炭酸ガスの吸着が完全に行えないため硬質ウレタンフ
ォーム４の熱伝導率が十分に改善できなかった。さら
に、モレキュラシーブス５の配設された部分の断熱性能
は極めて悪く、断熱箱体１の断熱性能が向上できなかっ
た。Therefore, the heat conductivity of the rigid urethane foam 4 could not be sufficiently improved because the carbon dioxide gas could not be completely adsorbed during the period from the production of the heat insulating box 1 to the actual use thereof. Furthermore, the heat insulation performance of the portion where the molecular sieves 5 are arranged is extremely poor, and the heat insulation performance of the heat insulation box 1 cannot be improved.
本発明は、上記問題点に鑑み、短時間で硬質ウレタン
フォーム中に含まれる炭酸ガスを吸着除去し、硬質ウレ
タンフォームの熱伝導率を改善し、断熱箱体の断熱性能
を改善することを目的とする。In view of the above problems, the present invention aims at adsorbing and removing carbon dioxide gas contained in a rigid urethane foam in a short time, improving the thermal conductivity of the rigid urethane foam, and improving the heat insulating performance of a heat insulating box. And
問題点を解決するための手段 本発明は、上記問題点を解決するために、炭酸ガス吸
着剤を含有させたシートを、あらかじめフロン溶剤で湿
潤させ、内箱と外箱の間に配設し、硬質ウレタンフォー
ムにより一体発泡して断熱箱体を形成するものである。Means for Solving Problems The present invention, in order to solve the above problems, a sheet containing a carbon dioxide adsorbent is pre-wet with a chlorofluorocarbon solvent, and is placed between an inner box and an outer box. , A rigid urethane foam is integrally foamed to form a heat insulating box.
作用 上記構成によって硬質ウレタンフォーム中に含まれる
炭酸ガスは、断熱壁の厚み方向に移動してシートに含有
させた炭酸ガス吸着剤に容易に吸着される。この場合、
炭酸ガスの移動速度の律速は、硬質ウレタンフォームの
断熱壁部の通過にあるが壁厚方向は移動距離が短いた
め、短時間で移動が可能である。また、シートを用いる
ことによって断熱性能への影響は少さく吸着面積も広く
なり吸着能力は極めて向上する。よって、硬質ウレタン
フォーム中に存在する炭酸ガスは容易に吸着剤によって
除去できるものである。Action With the above configuration, the carbon dioxide gas contained in the rigid urethane foam moves in the thickness direction of the heat insulating wall and is easily adsorbed by the carbon dioxide gas adsorbent contained in the sheet. in this case,
The rate of movement of the carbon dioxide gas is determined by the passage of the heat insulating wall of the rigid urethane foam, but since the movement distance is short in the wall thickness direction, it can be moved in a short time. Further, by using the sheet, the influence on the heat insulating performance is small and the adsorption area is widened so that the adsorption ability is significantly improved. Therefore, carbon dioxide gas existing in the rigid urethane foam can be easily removed by the adsorbent.
又、あらかじめフロン溶剤で湿潤した炭酸ガス吸着剤
含有シートを使用するため、硬質ウレタンフォームを填
填するまでの時間に炭酸ガスや水分等を吸着して炭酸ガ
スの吸着能力を劣化させることはなく、安定的に炭酸ガ
スの吸着が可能であり、さらに湿潤したフロン溶剤は、
硬質ウレタンフォーム中に拡散するため、炭酸ガスの吸
着に対して障害となったり、硬質ウレタンフォームの断
熱性能を劣化させることはない。Also, since a carbon dioxide gas adsorbent-containing sheet that has been wetted with a chlorofluorocarbon solvent is used in advance, carbon dioxide gas and water will not be adsorbed by the time it takes to fill the rigid urethane foam, and the carbon dioxide gas adsorption capacity will not be degraded. , Which can stably adsorb carbon dioxide, and the wetted Freon solvent is
Since it diffuses in the rigid urethane foam, it does not hinder the adsorption of carbon dioxide gas and does not deteriorate the heat insulation performance of the rigid urethane foam.
実施例 以下、実施例を挙げて本発明の断熱箱体を第１図〜第
３図を用いて説明する。なお、従来と同一構成のものに
ついては、同一番号を符して説明を省略する。Examples Hereinafter, the heat insulating box body of the present invention will be described with reference to FIGS. 1 to 3 by way of examples. It should be noted that the same components as those of the related art are denoted by the same reference numerals and the description thereof will be omitted.
７は、炭酸ガス吸着剤として東洋曹達製合成ゼオライ
ト9Fを含有させた不織布をフロン溶剤であるジブロモテ
トラフルオロエタンで湿潤させて成るシートである。前
記フィルム７を内箱３の裏面に接着テープ等で固定し、
前記内箱３と外箱２間を硬質ウレタンフォーム４にて一
体発泡して断熱箱体１を形成している。7 is a sheet obtained by wetting a non-woven fabric containing a synthetic zeolite 9F manufactured by Toyo Soda Co., Ltd. as a carbon dioxide adsorbent with a fluorocarbon solvent, dibromotetrafluoroethane. Fix the film 7 on the back surface of the inner box 3 with adhesive tape or the like,
A space between the inner box 3 and the outer box 2 is integrally foamed with a hard urethane foam 4 to form a heat insulating box 1.
得られた断熱箱体１を発泡直後に解体したものと、３
週間後に解体したものでは、硬質ウレタンフォーム４の
熱伝導率は、0.0130kcal/mh℃から0.0116kcal/mh℃まで
低減しており、断熱壁１として約10％断熱性能が向上し
ていることが判った。なお、熱伝導率は、真空理工
（株）製Ｋ−MATICを用い、平均温度24℃で測定した。The heat-insulating box 1 obtained was dismantled immediately after foaming, and 3
When dismantled after a week, the thermal conductivity of the rigid urethane foam 4 has decreased from 0.0130 kcal / mh ° C to 0.0116 kcal / mh ° C, indicating that the heat insulation performance of the heat insulation wall 1 has improved by about 10%. understood. The thermal conductivity was measured at an average temperature of 24 ° C using K-MATIC manufactured by Vacuum Riko Co., Ltd.
このように、本発明の断熱箱体１は、優れた断熱性能
を示すことが判った。これは硬質ウレタンフォーム原料
中の残留水分や一体発泡時の吸湿等による水分が硬化剤
であるイソシアネートと反応して発生した炭酸ガスが硬
質ウレタンフォーム４に残留することなくシート７に含
有させたゼオライトに吸着され除去されたことを示して
いる。吸着の過程においては、硬質ウレタンフォーム４
中の炭酸ガスは、断熱壁の厚さ方向に拡散移動して、吸
着面積が極めて広いシート７に含有させた吸着剤に到達
するため、その吸着速度は速い。特に吸着速度が律速と
なる独立気泡体である硬質ウレタンフォーム４層の拡散
移動が距離的に短かいので短時間で移動でき除去が可能
となるのである。As described above, it was found that the heat insulating box 1 of the present invention exhibits excellent heat insulating performance. This is the zeolite contained in the sheet 7 without causing carbon dioxide gas generated by the residual water in the raw material of the rigid urethane foam or the moisture due to the moisture absorption at the time of integral foaming to react with the isocyanate as the curing agent to remain in the rigid urethane foam 4. It has been adsorbed by and removed. In the process of adsorption, rigid urethane foam 4
Since the carbon dioxide gas therein diffuses and moves in the thickness direction of the heat insulating wall and reaches the adsorbent contained in the sheet 7 having an extremely large adsorption area, the adsorption speed thereof is high. In particular, the diffusion movement of the rigid urethane foam 4 layer, which is a closed-cell body whose adsorption rate is rate-determining, is short in distance, so that it can be moved in a short time and can be removed.
又、シート７に含有させたゼオライトからなる炭酸ガ
ス吸着剤は、沸点が47℃であるフロン溶剤ジブロモテト
ラフルオロエタンで湿潤させたものを配設するため、硬
質ウレタンフォーム４を充填するまでの間に少なくとも
室温が30℃に達する夏期においても蒸散することなく、
炭酸ガス吸着剤が空気に触れ空気中の炭酸ガスや水分な
どを吸着することはなく、炭酸ガスの吸着能力を低下さ
せることはない。又、フロン溶剤は、約１日以内に硬質
ウレタンフォーム中に拡散するが、ジブロモテトラフル
オロエタンは、ガス熱伝導率として0.0060kcal/mhr℃の
優れた熱伝導率を有しており、硬質ウレタンフォームの
断熱性能を劣化させることはない。Further, since the carbon dioxide adsorbent made of zeolite contained in the sheet 7 is arranged so as to be wet with the fluorocarbon solvent dibromotetrafluoroethane having a boiling point of 47 ° C., it is arranged until the hard urethane foam 4 is filled. At least room temperature does not evaporate even in the summer when it reaches 30 ℃,
The carbon dioxide gas adsorbent does not come into contact with air to adsorb carbon dioxide gas or moisture in the air, and does not reduce the carbon dioxide gas adsorption capacity. The CFC solvent diffuses into the hard urethane foam within about one day, but dibromotetrafluoroethane has an excellent gas thermal conductivity of 0.0060 kcal / mhr ° C. It does not deteriorate the insulation performance of the foam.
なお、実施例においてシート７の基材として不織布を
用いているが、プラスチック製あるいは布製のシートに
吸着剤を含有させたものも可能である。プラスチック製
シートにおいては吸着剤がシート内部に包み込まれたと
してもガス透過性があり炭酸ガスの吸着には特に問題は
ない。Although a nonwoven fabric is used as the base material of the sheet 7 in the examples, a plastic or cloth sheet containing an adsorbent may be used. Even if the adsorbent is wrapped inside the sheet, the plastic sheet has gas permeability and there is no particular problem in adsorbing carbon dioxide.
又、フロン溶剤としてジブロモテトラフルオロエタン
を使用したが、同等の沸点を有するトリクロロトリルフ
オロエタンでも同様の効果が得られた（参考、沸点：ジ
ブロモテトラフルオロエタン47.3℃，トリクロロトリフ
ルオロエタン47.5℃）。Although dibromotetrafluoroethane was used as a CFC solvent, similar effects were obtained with trichlorotolylfluoroethane having the same boiling point (reference, boiling points: dibromotetrafluoroethane 47.3 ° C, trichlorotrifluoroethane 47.5 ° C). .
発明の効果 以上の様に、あらかじめフロン溶剤で湿潤した炭酸ガ
ス吸着剤含有シートを、内箱と外箱の間に配設し、硬質
ウレタンフォームにより一体発泡して断熱箱体を形成し
ているため硬質ウレタンフォーム中に発生した炭酸ガス
は、容易に吸着除去が可能である。この結果、気泡中の
気体熱伝導率が低減し、硬質ウレタンフォームの熱伝導
率が改善され、優れた断熱性能を有する断熱箱体が提供
できるのである。Effects of the Invention As described above, the carbon dioxide adsorbent-containing sheet previously wetted with the Freon solvent is disposed between the inner box and the outer box, and is integrally foamed with the rigid urethane foam to form the heat insulating box body. Therefore, carbon dioxide gas generated in the rigid urethane foam can be easily adsorbed and removed. As a result, the gas thermal conductivity in the bubbles is reduced, the thermal conductivity of the rigid urethane foam is improved, and a heat insulating box having excellent heat insulating performance can be provided.
第１図は本発明の一実施例の断熱箱体の外観斜視図、第
２図は同断熱体の断面図、第３図は第２図の拡大断面
図、第４図は従来例の断熱箱体の断面図である。 １……断熱箱体、２……外箱、３……内箱、４……硬質
ウレタンフォーム、７……シート。FIG. 1 is an external perspective view of a heat insulation box body according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the heat insulation body, FIG. 3 is an enlarged cross-sectional view of FIG. 2, and FIG. It is sectional drawing of a box. 1 ... Insulation box, 2 ... Outer box, 3 ... Inner box, 4 ... Hard urethane foam, 7 ... Sheet.
Claims (3)
らかじめフロン溶剤で湿潤させ、内箱と外箱の間に配設
し、硬質ウレタンフォームにより一体発泡してなる断熱
箱体の製造方法。1. A method for producing a heat-insulating box body comprising a sheet containing a carbon dioxide gas adsorbent, which is previously wetted with a chlorofluorocarbon solvent, disposed between an inner box and an outer box, and integrally foamed with a rigid urethane foam. .
活性炭，金属水酸化物，金属酸化物等の吸着剤を用いた
特許請求の範囲第１項記載の断熱箱体の製造方法。2. A zeolite as the carbon dioxide adsorbent,
The method for producing a heat insulating box according to claim 1, wherein an adsorbent such as activated carbon, metal hydroxide or metal oxide is used.
ロエタン，トリクロロトリフルエタンより選ばれたフロ
ンを用いた特許請求の範囲第１項記載の断熱箱体の製造
方法。3. The method for producing a heat-insulated box according to claim 1, wherein a freon selected from dipromotetrafluoroethane and trichlorotrifluethane is used as the freon solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26451787A JPH0820176B2 (en) | 1987-10-20 | 1987-10-20 | Manufacturing method of heat insulation box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26451787A JPH0820176B2 (en) | 1987-10-20 | 1987-10-20 | Manufacturing method of heat insulation box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01107080A JPH01107080A (en) | 1989-04-24 |
| JPH0820176B2 true JPH0820176B2 (en) | 1996-03-04 |
Family
ID=17404347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26451787A Expired - Fee Related JPH0820176B2 (en) | 1987-10-20 | 1987-10-20 | Manufacturing method of heat insulation box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0820176B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004062309A1 (en) * | 2004-12-23 | 2006-07-20 | BSH Bosch und Siemens Hausgeräte GmbH | Thermoformed container and method for its production |
-
1987
- 1987-10-20 JP JP26451787A patent/JPH0820176B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01107080A (en) | 1989-04-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |