JP2015052337A - Vacuum heat insulation material, heat insulation box, and method of manufacturing vacuum heat insulation material - Google Patents

Vacuum heat insulation material, heat insulation box, and method of manufacturing vacuum heat insulation material Download PDF

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JP2015052337A
JP2015052337A JP2013184804A JP2013184804A JP2015052337A JP 2015052337 A JP2015052337 A JP 2015052337A JP 2013184804 A JP2013184804 A JP 2013184804A JP 2013184804 A JP2013184804 A JP 2013184804A JP 2015052337 A JP2015052337 A JP 2015052337A
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heat insulating
vacuum heat
outer packaging
core material
insulating material
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JP2015052337A5 (en
JP6132715B2 (en
Inventor
一正 藤村
Kazumasa Fujimura
一正 藤村
貴祥 向山
Takayoshi Mukoyama
貴祥 向山
京子 野村
Kyoko Nomura
京子 野村
司 高木
Tsukasa Takagi
司 高木
洋輔 藤森
Yosuke Fujimori
洋輔 藤森
尚平 安孫子
Shohei Abiko
尚平 安孫子
浩明 高井
Hiroaki Takai
浩明 高井
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2013184804A priority Critical patent/JP6132715B2/en
Priority to PCT/JP2014/070401 priority patent/WO2015033717A1/en
Priority to AU2014316348A priority patent/AU2014316348B2/en
Priority to KR1020167001074A priority patent/KR20160020535A/en
Priority to SG11201510107QA priority patent/SG11201510107QA/en
Priority to TW103127568A priority patent/TWI607883B/en
Priority to CN201420496654.3U priority patent/CN204114473U/en
Priority to CN201410436514.1A priority patent/CN104455935B/en
Publication of JP2015052337A publication Critical patent/JP2015052337A/en
Publication of JP2015052337A5 publication Critical patent/JP2015052337A5/ja
Priority to HK15107611.7A priority patent/HK1207146A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2509/00—Household appliances
    • B32B2509/10—Refrigerators or refrigerating equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulation material capable of being inexpensively obtained, a heat insulation box, and a method of manufacturing the vacuum heat insulation material.SOLUTION: A core material 10 made of a fiber assembly is covered with outer wrapping materials 20 and 21. Before the insides of the outer wrapping materials 20 and 21 are decompressed, the core material 10 and the outer wrapping materials 20 and 21 are integrally compressed by an external force and brought into a compressed state in which the thickness of the core material 10 becomes one-tenth or less of thickness before compression. In the compressed state, deposited seal parts 40 are formed on at least two mutually-opposed sides of peripheral edges of the outer wrapping materials 20 and 21. After formation of the deposited seal parts 40, the insides of the outer wrapping materials 20 and 21 are decompressed and hermetically sealed.

Description

本発明は、真空断熱材、断熱箱、及び真空断熱材の製造方法に関するものである。   The present invention relates to a vacuum heat insulating material, a heat insulating box, and a method for manufacturing a vacuum heat insulating material.

冷蔵庫等の断熱材として用いられている従来の真空断熱材としては、ガラス繊維の集合体からなる芯材を、ガスバリア性を有する外包材で被覆し、外包材の内部が減圧して密閉されたものがある（例えば、特許文献１参照）。この真空断熱材は、加熱プレスにより予めボード状に成形された芯材を袋状に成形された外包材に挿入し、外包材の内部を減圧し、開口部を熱溶着により密閉封止することにより作製される。   As a conventional vacuum heat insulating material used as a heat insulating material for a refrigerator or the like, a core material made of an aggregate of glass fibers is covered with an outer packaging material having a gas barrier property, and the inside of the outer packaging material is sealed under reduced pressure. There are some (see, for example, Patent Document 1). This vacuum heat insulating material inserts a core material previously formed into a board shape by a hot press into an outer packaging material formed into a bag shape, depressurizes the inside of the outer packaging material, and hermetically seals the opening by heat welding. It is produced by.

また、従来の真空断熱材としては、繊維質材を有機系バインダーを用いて固め成形した断熱材と、金属箔の層を積層してなるラミネートフィルムとを備え、ラミネートフィルムの縁部がシールされ内部が減圧されたものがある（例えば、特許文献２参照）。   In addition, the conventional vacuum heat insulating material includes a heat insulating material formed by compacting a fibrous material with an organic binder, and a laminate film formed by laminating metal foil layers, and the edge of the laminate film is sealed. There is one in which the inside is decompressed (see, for example, Patent Document 2).

また、従来の真空断熱材としては、柔軟性を有する内袋に無機繊維重合体を収納した芯材と、芯材を収納して内部を減圧し周縁部を溶着して封止したラミネートフィルムからなる外包材と、を備えたものがある（例えば、特許文献３参照）。   In addition, as a conventional vacuum heat insulating material, from a core material containing an inorganic fiber polymer in a flexible inner bag, and a laminate film containing the core material, depressurizing the inside and welding the peripheral portion to seal And an outer packaging material (see, for example, Patent Document 3).

特許第３５８０３１５号公報Japanese Patent No. 3580315 特開平９−１３８０５８号公報Japanese Patent Laid-Open No. 9-138058 特開２００７−９９２８号公報JP 2007-9928 A

真空断熱材は、繊維集合体からなる芯材と、芯材を被覆する外包材とを備え、外包材の内部が減圧密封された構成を有している。芯材に用いられる繊維集合体は、外包材の内部が減圧密封される前後で体積が大きく変化する。このため、芯材を外包材に挿入する際には、外包材を芯材より大幅に大きくしておく必要がある。したがって、外包材の内部を減圧して密封した後には、芯材の存在しない余分な耳部が真空断熱材の周縁部に大きく残ってしまうものであった。この余分な耳部が残ってしまうことにより、外包材の材料費が増加してしまうとともに、真空断熱材を断熱箱に配設する際には、余分な耳部を折り曲げる耳折工程が必要となってしまう。このため、真空断熱材を安価に得ることができないという問題点があった。   The vacuum heat insulating material includes a core material made of a fiber assembly and an outer packaging material that covers the core material, and the inside of the outer packaging material is sealed under reduced pressure. The volume of the fiber assembly used for the core material changes greatly before and after the inside of the outer packaging material is sealed under reduced pressure. For this reason, when inserting a core material into an outer packaging material, it is necessary to make the outer packaging material significantly larger than the core material. Accordingly, after the inside of the outer packaging material is reduced in pressure and sealed, an excessive ear portion in which the core material does not exist largely remains on the peripheral edge portion of the vacuum heat insulating material. Since the extra ears remain, the material cost of the outer packaging material increases, and when placing the vacuum heat insulating material in the heat insulation box, an ear folding process is required to bend the extra ears. turn into. For this reason, there existed a problem that a vacuum heat insulating material could not be obtained cheaply.

外包材の内部が減圧密封される前後での芯材の体積変化を小さくするためには、特許文献１に記載されているように芯材を加熱プレスして予めボード状に成形する方法、特許文献２に記載されているように有機系バインダー等の結合剤を用いて繊維集合体を結着させる方法、及び、特許文献３に記載されているように内包材（内袋）等を用いて芯材を予備的に減圧密封する方法がある。しかしながら、これらの方法を用いた場合には、芯材を加熱するための動力費や、結合剤や内包材の材料費が増加してしまう。このため、真空断熱材を安価に得ることができないという問題点があった。   In order to reduce the volume change of the core material before and after the inside of the outer packaging material is sealed under reduced pressure, as described in Patent Document 1, a method of pre-forming the core material into a board shape by hot pressing, Patent A method of binding a fiber assembly using a binder such as an organic binder as described in Document 2, and an inner packaging material (inner bag) as described in Patent Document 3 There is a method of preliminarily sealing the core material under reduced pressure. However, when these methods are used, the power cost for heating the core material and the material cost of the binder and the inner packaging material increase. For this reason, there existed a problem that a vacuum heat insulating material could not be obtained cheaply.

本発明は、上述のような問題点を解決するためになされたものであり、安価に得ることができる真空断熱材、断熱箱、及び真空断熱材の製造方法を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vacuum heat insulating material, a heat insulating box, and a vacuum heat insulating material manufacturing method that can be obtained at low cost.

本発明に係る真空断熱材の製造方法は、繊維集合体からなる芯材を外包材で被覆し、前記外包材の内部を減圧する前に、前記芯材及び前記外包材を外力で一体に圧縮して、前記芯材の厚みが圧縮前の１／１０以下となる圧縮状態とし、前記圧縮状態において、前記外包材の周縁部のうち少なくとも相対する２辺に溶着シール部を形成し、前記溶着シール部を形成した後に、前記外包材の内部を減圧して密封することを特徴とするものである。   The method for manufacturing a vacuum heat insulating material according to the present invention includes: coating a core material made of a fiber assembly with an outer packaging material; and compressing the core material and the outer packaging material together with an external force before decompressing the inside of the outer packaging material. The core material is in a compressed state where the thickness is 1/10 or less of that before compression, and in the compressed state, a welding seal portion is formed on at least two opposite sides of the peripheral portion of the outer packaging material, and the welding is performed. After the sealing portion is formed, the inside of the outer packaging material is reduced in pressure and sealed.

また、本発明に係る真空断熱材は、繊維集合体からなる芯材と、前記芯材を被覆する外包材とを備え、前記外包材の内部が減圧密封され、全体として１０ｍｍ以上の断熱材厚みを有する真空断熱材であって、前記外包材は、周縁部に溶着シール部を有しており、前記外包材の周縁部のうち少なくとも相対する２辺において、前記溶着シール部と前記芯材との距離が５ｍｍ以下であり、前記溶着シール部が、前記芯材形状に沿って固定されており、前記外包材の内部から前記芯材を取り出した場合における大気圧下での前記芯材の厚みは、前記断熱材厚みの１０倍以上であることを特徴とするものである。   Further, the vacuum heat insulating material according to the present invention includes a core material made of a fiber assembly and an outer packaging material that covers the core material, and the inside of the outer packaging material is hermetically sealed under reduced pressure, and the total thickness of the heat insulating material is 10 mm or more. The outer packaging material has a welding seal portion at a peripheral edge, and at least two opposite sides of the peripheral edge of the outer packaging material, the welding seal portion and the core material The welding seal portion is fixed along the core material shape, and the thickness of the core material under atmospheric pressure when the core material is taken out from the outer packaging material Is not less than 10 times the thickness of the heat insulating material.

本発明によれば、動力費や材料費の増加を抑えつつ、真空断熱材の周縁部における耳部の幅を減少させることができる。したがって、外包材の材料費を削減することができるため、真空断熱材を安価に得ることができる。   ADVANTAGE OF THE INVENTION According to this invention, the width | variety of the ear | edge part in the peripheral part of a vacuum heat insulating material can be reduced, suppressing the increase in power cost and material cost. Therefore, since the material cost of the outer packaging material can be reduced, the vacuum heat insulating material can be obtained at a low cost.

本発明の実施の形態１に係る真空断熱材１の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the vacuum heat insulating material 1 which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る真空断熱材１の製造工程を示す図である。It is a figure which shows the manufacturing process of the vacuum heat insulating material 1 which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る真空断熱材１の製造工程を示す図である。It is a figure which shows the manufacturing process of the vacuum heat insulating material 1 which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る真空断熱材１の製造工程を示す図である。It is a figure which shows the manufacturing process of the vacuum heat insulating material 1 which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る真空断熱材２の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the vacuum heat insulating material 2 which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係る断熱箱３の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the heat insulation box 3 which concerns on Embodiment 3 of this invention.

実施の形態１．
本発明の実施の形態１に係る真空断熱材及びその製造方法について説明する。図１は、本実施の形態に係る真空断熱材１の概略構成を示す断面図である。なお、図１を含む以下の図面では、各構成部材の寸法の関係や形状等が実際のものとは異なる場合がある。各構成部材の具体的な寸法等は、以下の説明を参酌した上で判断すべきものである。 Embodiment 1 FIG.
The vacuum heat insulating material and the manufacturing method thereof according to Embodiment 1 of the present invention will be described. FIG. 1 is a cross-sectional view showing a schematic configuration of a vacuum heat insulating material 1 according to the present embodiment. In the following drawings including FIG. 1, the dimensional relationship and shape of each component may differ from the actual ones. Specific dimensions and the like of each component should be determined in consideration of the following description.

図１に示すように、真空断熱材１は、繊維集合体からなる芯材１０と、ガスバリア性を有し、芯材１０の両面を被覆する２枚の外包材２０、２１と、外包材２０、２１の内部空間に挿入され、水分を吸着して芯材１０等の経時劣化を抑制する水分吸着剤３０と、を備えている。外包材２０、２１の内部空間は、１〜３Ｐａ程度の真空度に減圧された状態で開口部が密封されることにより減圧密封されている。開口部の密封は、ヒートシール等によって外包材２０、２１の周縁部を溶着し、溶着シール部４０を形成することにより行われる。真空断熱材１は、全体として概略長方形平板状の形状を有している。   As shown in FIG. 1, the vacuum heat insulating material 1 includes a core material 10 made of a fiber assembly, two outer packaging materials 20, 21 having gas barrier properties and covering both surfaces of the core material 10, and an outer packaging material 20. , 21 and a moisture adsorbent 30 that adsorbs moisture and suppresses deterioration over time of the core material 10 and the like. The internal spaces of the outer packaging materials 20 and 21 are sealed under reduced pressure by sealing the opening in a state where the pressure is reduced to about 1 to 3 Pa. Sealing of the opening is performed by welding the peripheral portions of the outer packaging materials 20 and 21 by heat sealing or the like to form the welding seal portion 40. The vacuum heat insulating material 1 has a substantially rectangular flat plate shape as a whole.

外包材２０、２１は、既存の真空断熱材に使用されている外包材であり、多層構造をなすラミネートフィルムである。この多層構造は、例えば、内側（芯材１０側）から順にポリエチレン層、アルミ蒸着層、ポリエチレンテレフタレート層、及び最外層の延伸ナイロン層が積層された構成を有する。外包材２０、２１の構成は、上記構成には限定されず、アルミナ蒸着層、エチレン−ビニルアルコール層、ポリプロピレン層が含まれていてもよい。また、外包材２０、２１は、ガスバリア性を有するものであれば、特に構成が限定されるものではない。   The outer packaging materials 20 and 21 are outer packaging materials used for existing vacuum heat insulating materials, and are laminated films having a multilayer structure. This multilayer structure has, for example, a structure in which a polyethylene layer, an aluminum vapor deposition layer, a polyethylene terephthalate layer, and an outermost stretched nylon layer are laminated in order from the inner side (core material 10 side). The structure of the outer packaging materials 20 and 21 is not limited to the said structure, The alumina vapor deposition layer, the ethylene-vinyl alcohol layer, and the polypropylene layer may be contained. The outer packaging materials 20 and 21 are not particularly limited in configuration as long as they have gas barrier properties.

水分吸着剤３０は、例えば、通気性の良い袋に挿入された酸化カルシウム（ＣａＯ）等により構成されている。水分吸着剤３０は、ＣａＯのみに限定されるものではなく、ゼオライトなどの水分吸着性を有するものを用いることができる。   The moisture adsorbent 30 is made of, for example, calcium oxide (CaO) inserted into a bag having good air permeability. The water adsorbent 30 is not limited to CaO alone, and a water adsorbent such as zeolite can be used.

芯材１０は、グラスウールなどの繊維集合体が積層された構成を有している。芯材１０は、完成後の真空断熱材１において、大気圧下で１０ｍｍ以上（例えば、５０ｍｍ以下）の厚みを有している。すなわち、真空断熱材１は、大気圧下で全体として１０ｍｍ以上の厚みを有している。仮に、外包材２０、２１の内部から芯材１０を取り出した場合、大気圧下での芯材１０の厚みは、真空断熱材１の厚みの１０倍以上（例えば、２０倍以下）となる。繊維集合体は、グラスウールであれば遠心法により製造され、樹脂繊維であればスパンボンド法により製造されることが一般的であるが、繊維集合体の製造方法は、特に限定されるものではない。本実施の形態では、芯材１０を構成する繊維集合体は、内袋等の内包材を介さずに外包材２０に直接被覆されている。すなわち、真空断熱材１において、芯材１０を構成する繊維集合体は外包材２０の内側表面に直接接触している。また、芯材１０は、繊維集合体を結着させる結合剤を含んでいない。   The core material 10 has a configuration in which fiber assemblies such as glass wool are laminated. The core material 10 has a thickness of 10 mm or more (for example, 50 mm or less) under atmospheric pressure in the vacuum heat insulating material 1 after completion. That is, the vacuum heat insulating material 1 has a thickness of 10 mm or more as a whole under atmospheric pressure. If the core material 10 is taken out from the outer packaging materials 20 and 21, the thickness of the core material 10 under atmospheric pressure is 10 times or more (for example, 20 times or less) of the thickness of the vacuum heat insulating material 1. The fiber aggregate is generally manufactured by a centrifugal method if it is glass wool, and is manufactured by a spunbond method if it is a resin fiber, but the manufacturing method of the fiber aggregate is not particularly limited. . In the present embodiment, the fiber assembly constituting the core material 10 is directly covered with the outer packaging material 20 without using an inner packaging material such as an inner bag. That is, in the vacuum heat insulating material 1, the fiber assembly constituting the core material 10 is in direct contact with the inner surface of the outer packaging material 20. Further, the core material 10 does not contain a binder that binds the fiber assembly.

溶着シール部４０は、外包材２０、２１の周縁部（耳部）のうちの少なくとも３辺（例えば、４辺）に形成されている。溶着シール部４０は、外包材２０、２１の周縁部の全周に亘って切れ目なく形成されている。外包材２０、２１の周縁部のうち少なくとも相対する２辺において、溶着シール部４０と芯材１０との距離Ａが５ｍｍ以下（例えば、１ｍｍ以上）となっている。溶着シール部４０は、芯材１０の形状に沿って固定されている。   The welding seal portion 40 is formed on at least three sides (for example, four sides) of the peripheral portions (ear portions) of the outer packaging materials 20 and 21. The welding seal portion 40 is formed without any breaks over the entire circumference of the peripheral edge portions of the outer packaging materials 20 and 21. The distance A between the welding seal part 40 and the core material 10 is 5 mm or less (for example, 1 mm or more) on at least two opposite sides of the peripheral parts of the outer packaging materials 20 and 21. The welding seal portion 40 is fixed along the shape of the core material 10.

次に、本実施の形態に係る真空断熱材の製造方法について説明する。図２〜図４は、真空断熱材１の製造工程を示す図である。また、図２〜図４は、製造工程で用いられる加工装置５０の構成も併せて示している。図２〜図４に示すように、加工装置５０は、圧縮機構５１と溶着機構５２ａ、５２ｂとを有している。圧縮機構５１は、芯材１０と芯材１０を被覆する外包材２０、２１とを一体で加圧圧縮するものである。溶着機構５２ａ、５２ｂは、圧縮機構５１により芯材１０及び外包材２０、２１が加圧圧縮された状態で、外包材２０、２１の周縁部のうちの相対する２辺に溶着シール部４０を形成するものである。溶着機構５２ａ、５２ｂは、圧縮機構５１を挟んで両側に配置されている。また、溶着機構５２ａ、５２ｂは、圧縮機構５１により芯材１０及び外包材２０、２１が圧縮された状態で、芯材１０に近接して溶着シール部４０を形成できるように、圧縮機構５１に近接して設けられている。例えば、溶着機構５２ａ、５２ｂは、溶着シール部４０と芯材１０との間の距離Ａが５ｍｍ以下となる溶着シール部４０を形成できるようになっている。   Next, the manufacturing method of the vacuum heat insulating material which concerns on this Embodiment is demonstrated. 2-4 is a figure which shows the manufacturing process of the vacuum heat insulating material 1. FIG. 2 to 4 also show the configuration of the processing apparatus 50 used in the manufacturing process. As shown in FIGS. 2 to 4, the processing apparatus 50 includes a compression mechanism 51 and welding mechanisms 52 a and 52 b. The compression mechanism 51 integrally compresses and compresses the core material 10 and the outer packaging materials 20 and 21 covering the core material 10. The welding mechanisms 52a and 52b are configured to place the welding seal portion 40 on two opposite sides of the peripheral portions of the outer packaging materials 20 and 21 in a state where the core material 10 and the outer packaging materials 20 and 21 are compressed by the compression mechanism 51. To form. The welding mechanisms 52a and 52b are disposed on both sides of the compression mechanism 51. Further, the welding mechanisms 52a and 52b are provided in the compression mechanism 51 so that the welding seal portion 40 can be formed in the vicinity of the core material 10 in a state where the core material 10 and the outer packaging materials 20 and 21 are compressed by the compression mechanism 51. Proximity is provided. For example, the welding mechanisms 52a and 52b can form the welding seal part 40 in which the distance A between the welding seal part 40 and the core material 10 is 5 mm or less.

真空断熱材１の製造工程においては、まず、図２に示すように、芯材１０を真空断熱材１として必要な幅と長さに加工し、芯材１０の両面（上面及び下面）を２枚の外包材２０、２１で被覆した状態で加工装置５０（圧縮機構５１）に配置する。この工程は、大気圧雰囲気で行われる。このときの芯材１０の厚みＴ１は、完成後の真空断熱材１の厚み（又は芯材１０の厚み）と比較して１０倍以上となっている。   In the manufacturing process of the vacuum heat insulating material 1, first, as shown in FIG. 2, the core material 10 is processed into a necessary width and length as the vacuum heat insulating material 1, and both surfaces (upper surface and lower surface) of the core material 10 are 2. It arrange | positions in the processing apparatus 50 (compression mechanism 51) in the state coat | covered with the sheet | seat outer packaging materials 20 and 21. FIG. This step is performed in an atmospheric pressure atmosphere. The thickness T1 of the core material 10 at this time is 10 times or more compared with the thickness of the vacuum heat insulating material 1 after completion (or the thickness of the core material 10).

次に、図３に示すように、圧縮機構５１によって外包材２０、２１の両外側表面から芯材１０及び外包材２０、２１を一体で機械的に加圧圧縮する（加圧圧縮工程）。加圧圧縮工程は、大気圧雰囲気で行われる。圧縮するときの圧力は、大気圧相当の０．１０ＭＰａ以上であることが好ましく、０．１７ＭＰａ以上であればより好ましい。圧縮状態の芯材１０の厚みＴ２は、大気圧下にある圧縮前の芯材１０の厚みＴ１の１／１０以下（例えば、１／２０以上）となっている。また、圧縮状態における芯材１０及び外包材２０、２１の一体の厚みは、完成後の真空断熱材１の厚みとほぼ同じである。   Next, as shown in FIG. 3, the core member 10 and the outer packaging materials 20, 21 are mechanically compressed and compressed integrally from both outer surfaces of the outer packaging materials 20, 21 by the compression mechanism 51 (pressure compression process). The pressure compression process is performed in an atmospheric pressure atmosphere. The pressure at the time of compression is preferably 0.10 MPa or more equivalent to atmospheric pressure, and more preferably 0.17 MPa or more. The thickness T2 of the core material 10 in the compressed state is 1/10 or less (for example, 1/20 or more) of the thickness T1 of the core material 10 before compression under atmospheric pressure. Moreover, the integral thickness of the core material 10 and the outer packaging materials 20 and 21 in the compressed state is substantially the same as the thickness of the vacuum heat insulating material 1 after completion.

次に、図４に示すように、圧縮機構５１によって芯材１０及び外包材２０、２１が一体で加圧圧縮されている圧縮状態において、溶着機構５２ａにより、外包材２０、２１の周縁部のうちの１辺に溶着シール部４０を形成する（溶着シール部形成工程）。また、この圧縮状態において、溶着機構５２ｂにより、外包材２０、２１の周縁部のうちの上記１辺に相対する他方の１辺に、溶着シール部４０を形成する。これらの溶着シール部４０は、同時に形成されるようにしてもよい。また、これらの溶着シール部４０は、例えば、いずれも芯材１０との距離Ａが５ｍｍ以下（例えば、１ｍｍ以上）となるように形成される。溶着シール部形成工程は、大気圧雰囲気で行われる。相対する２辺に溶着シール部４０が形成されることによって、芯材１０及び外包材２０、２１が一体化し、圧縮機構５１による加圧を解除しても芯材１０の圧縮状態が維持される。溶着シール部形成工程では、外包材２０、２１の周縁部の一部に開口部が確保されていれば、外包材２０、２１の３辺以上に溶着シール部４０を形成してもよい。   Next, as shown in FIG. 4, in the compressed state where the core material 10 and the outer packaging materials 20 and 21 are integrally compressed by the compression mechanism 51, the peripheral portions of the outer packaging materials 20 and 21 are formed by the welding mechanism 52 a. The welding seal | sticker part 40 is formed in one side of them (welding seal | sticker part formation process). Further, in this compressed state, the welding seal portion 40 is formed on the other one side of the peripheral portions of the outer packaging materials 20 and 21 opposite to the one side by the welding mechanism 52b. These welding seal portions 40 may be formed at the same time. Moreover, these welding seal parts 40 are formed so that the distance A with respect to the core material 10 may be 5 mm or less (for example, 1 mm or more), for example. The welding seal portion forming step is performed in an atmospheric pressure atmosphere. By forming the welding seal portions 40 on the two opposite sides, the core material 10 and the outer packaging materials 20 and 21 are integrated, and the compressed state of the core material 10 is maintained even when the pressure applied by the compression mechanism 51 is released. . In the welding seal portion forming step, the welding seal portion 40 may be formed on three or more sides of the outer packaging materials 20, 21 as long as an opening is secured in a part of the peripheral portion of the outer packaging materials 20, 21.

次に、圧縮機構５１による加圧を解除し、一体化した芯材１０及び外包材２０、２１を加工装置５０から取り出す。その後、芯材１０及び外包材２０、２１から水分を除去するための乾燥工程を行う。乾燥工程は、芯材１０及び外包材２０、２１の水分を除去できる条件（例えば、１００℃で２時間の加熱）で行われる。なお、乾燥工程の条件はこれに限定されず、芯材１０及び外包材２０、２１の水分を除去できる条件であればよい。   Next, the pressurization by the compression mechanism 51 is released, and the integrated core material 10 and outer packaging materials 20 and 21 are taken out from the processing apparatus 50. Then, the drying process for removing a water | moisture content from the core material 10 and the outer packaging materials 20 and 21 is performed. A drying process is performed on the conditions which can remove the water | moisture content of the core material 10 and the outer packaging materials 20 and 21 (for example, heating for 2 hours at 100 degreeC). In addition, the conditions of a drying process are not limited to this, What is necessary is just the conditions which can remove the water | moisture content of the core material 10 and the outer packaging materials 20 and 21. FIG.

次に、外包材２０、２１の内部空間に水分吸着剤３０が挿入される（水分吸着剤挿入工程）。なお、水分吸着剤挿入工程は、乾燥工程の後に行われることに限定されず、乾燥工程の前や、加圧圧縮工程の前に行われてもよい。   Next, the moisture adsorbent 30 is inserted into the internal space of the outer packaging materials 20 and 21 (moisture adsorbent insertion step). The moisture adsorbent insertion step is not limited to being performed after the drying step, and may be performed before the drying step or before the pressure compression step.

次に、外包材２０、２１の内部を１〜３Ｐａ程度の真空度に減圧し、その減圧状態で開口部（例えば、既に溶着シール部４０が形成された２辺以外の辺）にヒートシール等により溶着シール部４０を形成し、外包材２０、２１の内部を減圧密封する（減圧密封工程）。減圧密封工程で形成される溶着シール部４０も、芯材１０との距離が５ｍｍ以下となるように形成してもよい。以上の工程を経て、真空断熱材１が得られる。   Next, the inside of the outer packaging materials 20 and 21 is depressurized to a degree of vacuum of about 1 to 3 Pa, and heat sealing or the like is performed on the opening (for example, sides other than the two sides where the welding seal portion 40 has already been formed) in the depressurized state. Thus, the welding seal portion 40 is formed, and the inside of the outer packaging materials 20 and 21 is sealed under reduced pressure (a reduced pressure sealing step). The welding seal portion 40 formed in the vacuum sealing step may also be formed so that the distance from the core material 10 is 5 mm or less. The vacuum heat insulating material 1 is obtained through the above steps.

次に、本実施の形態の効果について説明する。本実施の形態の製造方法では、外包材２０、２１の内部を減圧する前に、芯材１０及び外包材２０、２１を外力で一体に圧縮して、芯材１０の厚みが圧縮前の１／１０以下となる圧縮状態とし、当該圧縮状態において、外包材２０、２１の周縁部のうち少なくとも相対する２辺に溶着シール部４０を形成している。これにより、外包材２０、２１の周縁部のうち少なくとも相対する２辺において、溶着シール部４０と芯材１０との距離Ａを短くすることができる。例えば、距離Ａは５ｍｍ以下とすることができる。これにより、真空断熱材１の周縁部において芯材１０が存在しない耳部の幅を減少させることができるため、外包材２０、２１の材料費を削減することができる。また、耳部の幅を減少させることができるため、耳折工程を省略することができる場合がある。したがって、本実施の形態によれば、真空断熱材１を安価に得ることができる。   Next, the effect of this embodiment will be described. In the manufacturing method of the present embodiment, before decompressing the inside of the outer packaging materials 20 and 21, the core material 10 and the outer packaging materials 20 and 21 are integrally compressed by an external force, and the thickness of the core material 10 is 1 before compression. In the compressed state, the welded seal portion 40 is formed on at least two opposing sides of the peripheral portions of the outer packaging materials 20 and 21 in the compressed state. Thereby, the distance A of the welding seal part 40 and the core material 10 can be shortened in at least two opposing sides of the peripheral parts of the outer packaging materials 20 and 21. For example, the distance A can be 5 mm or less. Thereby, since the width | variety of the ear | edge part in which the core material 10 does not exist in the peripheral part of the vacuum heat insulating material 1 can be reduced, the material cost of the outer packaging materials 20 and 21 can be reduced. Moreover, since the width | variety of an ear | edge part can be reduced, an ear folding process may be able to be skipped. Therefore, according to this Embodiment, the vacuum heat insulating material 1 can be obtained cheaply.

本実施の形態の真空断熱材１と、溶着シール部４０と芯材１０との距離が２０ｍｍ程度である一般的な真空断熱材との比較を考える。本実施の形態の真空断熱材１によれば、外包材２０、２１の周縁部のうち少なくとも相対する２辺において、溶着シール部４０と芯材１０との距離Ａを例えば５ｍｍ以下とすることができる。これにより、芯材１０が存在しない耳部の幅を一般的な真空断熱材よりも減少させることができるため、外包材２０、２１の使用量を削減することができ、外包材２０、２１の材料費を削減することができる。したがって、本実施の形態によれば、真空断熱材１を安価に得ることができる。   Consider a comparison between the vacuum heat insulating material 1 of the present embodiment and a general vacuum heat insulating material in which the distance between the welding seal portion 40 and the core material 10 is about 20 mm. According to the vacuum heat insulating material 1 of the present embodiment, the distance A between the welding seal portion 40 and the core material 10 is set to, for example, 5 mm or less on at least two opposing sides of the peripheral portions of the outer packaging materials 20 and 21. it can. Thereby, since the width | variety of the ear | edge part in which the core material 10 does not exist can be reduced rather than a general vacuum heat insulating material, the usage-amount of the outer packaging materials 20 and 21 can be reduced, and the outer packaging materials 20 and 21 can be reduced. Material costs can be reduced. Therefore, according to this Embodiment, the vacuum heat insulating material 1 can be obtained cheaply.

加えて、本実施の形態によれば、少なくとも相対する２辺において溶着シール部４０と芯材１０との距離Ａを短くすることができる（例えば、距離Ａを５ｍｍ以下にすることができる）ため、芯材１０が復元力によって膨らもうとする作用を外包材２０、２１及び溶着シール部４０によって抑えることができる。このため、製造段階において、加工装置５０から取り出した後（減圧密封前）の芯材１０及び外包材２０、２１の一体の厚みと、完成後（減圧密封後）の真空断熱材１の厚みとをほぼ一致させることができる。このことにより、芯材を加熱プレスして予めボード状に成形する方法や、結合剤を用いて繊維集合体を結着させる方法や、内包材等を用いて芯材を予備的に減圧密封する方法等を用いなくても、外包材２０、２１の内部を減圧密封する前後での芯材１０の体積変化を小さくすることができる。したがって、芯材を加熱するための動力費や、結合剤や内包材の材料費の増加を抑えることができる。これにより、本実施の形態によれば、真空断熱材１を安価に得ることができる。   In addition, according to the present embodiment, the distance A between the welded seal portion 40 and the core material 10 can be shortened (for example, the distance A can be 5 mm or less) on at least two opposite sides. The action of the core material 10 trying to expand due to the restoring force can be suppressed by the outer packaging materials 20 and 21 and the welding seal portion 40. For this reason, in the manufacturing stage, after taking out from the processing apparatus 50 (before pressure reduction sealing), the integral thickness of the core material 10 and the outer packaging materials 20, 21 and the thickness of the vacuum heat insulating material 1 after completion (after pressure reduction sealing) Can be substantially matched. By this, the core material is preliminarily sealed under reduced pressure using a method in which the core material is heated and pressed into a board shape in advance, a method in which the fiber assembly is bound using a binder, an inner packaging material, or the like. Even without using a method or the like, the volume change of the core material 10 before and after sealing the inside of the outer packaging materials 20 and 21 under reduced pressure can be reduced. Therefore, it is possible to suppress an increase in power costs for heating the core material and material costs for the binder and the encapsulating material. Thereby, according to this Embodiment, the vacuum heat insulating material 1 can be obtained cheaply.

実施の形態２．
本発明の実施の形態２に係る真空断熱材及びその製造方法について説明する。図５は、本実施の形態に係る真空断熱材２の概略構成を示す断面図である。なお、実施の形態１と同一の機能及び作用を有する構成要素については、同一の符号を付してその説明を省略する。 Embodiment 2. FIG.
A vacuum heat insulating material and a manufacturing method thereof according to Embodiment 2 of the present invention will be described. FIG. 5 is a cross-sectional view showing a schematic configuration of the vacuum heat insulating material 2 according to the present embodiment. In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

本実施の形態の真空断熱材２は、溶着シール部４０（例えば、外包材２０、２１の周縁部の４辺に形成された全ての溶着シール部４０）の１辺における幅Ｂが５０ｍｍ以上（例えば、１００ｍｍ以下）である点に特徴を有している。すなわち、本実施の形態では、真空断熱材２の製造工程における溶着シール部形成工程又は減圧密封工程において、溶着シール部４０の幅Ｂが５０ｍｍ以上になるようにする。真空断熱材２のその他の部分の構成は、上記実施の形態１の真空断熱材１と同様である。   In the vacuum heat insulating material 2 according to the present embodiment, the width B on one side of the welding seal portion 40 (for example, all the welding seal portions 40 formed on the four sides of the peripheral portions of the outer packaging materials 20 and 21) is 50 mm or more ( For example, it is characterized in that it is 100 mm or less. That is, in the present embodiment, the width B of the welding seal portion 40 is set to 50 mm or more in the welding seal portion forming step or the vacuum sealing step in the manufacturing process of the vacuum heat insulating material 2. The structure of the other part of the vacuum heat insulating material 2 is the same as that of the vacuum heat insulating material 1 of the first embodiment.

芯材１０として用いられる一般的な繊維集合体の繊維長は２０ｍｍ程度である。本実施の形態の真空断熱材２では、溶着シール部４０の幅Ｂを５０ｍｍ以上とすることにより、溶着シール部４０の幅Ｂを芯材１０の繊維長よりも十分に大きくすることができる。このため、溶着機構５２ｂ等を用いて溶着シール部４０を形成する際に、仮に芯材１０の繊維が溶着シール部４０に噛み込んだとしても、繊維の噛込み箇所から真空漏れが生じてしまうことを防ぐことができる。したがって、本実施の形態によれば、実施の形態１と同様の効果を得ることができることに加えて、さらに信頼性の高い真空断熱材２を得ることができる。   The fiber length of a general fiber assembly used as the core material 10 is about 20 mm. In the vacuum heat insulating material 2 of this Embodiment, the width B of the welding seal part 40 can be made sufficiently larger than the fiber length of the core material 10 by setting the width B of the welding seal part 40 to 50 mm or more. For this reason, when forming the welding seal portion 40 using the welding mechanism 52b or the like, even if the fibers of the core material 10 are bitten into the welding seal portion 40, vacuum leakage occurs from the biting position of the fibers. Can be prevented. Therefore, according to the present embodiment, in addition to obtaining the same effect as in the first embodiment, it is possible to obtain the vacuum heat insulating material 2 with higher reliability.

実施の形態３．
本発明の実施の形態３に係る断熱箱について説明する。上記の実施の形態１及び２では真空断熱材及びその製造方法について説明したが、上記実施の形態１又は２に係る真空断熱材１又は２を断熱箱に使用することで、安価でかつ断熱性能の高い断熱箱を得ることができる。図６は、本実施の形態に係る断熱箱３の概略構成を示す断面図である。本実施の形態では、冷蔵庫の断熱箱を例に挙げて説明する。 Embodiment 3 FIG.
A heat insulation box according to Embodiment 3 of the present invention will be described. In the first and second embodiments, the vacuum heat insulating material and the manufacturing method thereof have been described. By using the vacuum heat insulating material 1 or 2 according to the first or second embodiment for a heat insulating box, the heat insulating performance is low. High heat insulation box can be obtained. FIG. 6 is a cross-sectional view showing a schematic configuration of the heat insulating box 3 according to the present embodiment. In the present embodiment, a heat insulating box of a refrigerator will be described as an example.

図６に示すように、断熱箱３は、内箱６０と外箱６１とを有している。内箱６０と外箱６１との間の空間には、真空断熱材１（又は真空断熱材２）が配置されている。真空断熱材１は、例えば内箱６０の外壁面に密着して配置されている。内箱６０と外箱６１との間の空間において真空断熱材１以外の部分には、発泡ウレタン断熱材６２が充填されている。断熱箱３のその他の部分は、一般的な冷蔵庫の断熱箱と同様であるため、図示及び説明を省略する。   As shown in FIG. 6, the heat insulating box 3 has an inner box 60 and an outer box 61. In the space between the inner box 60 and the outer box 61, the vacuum heat insulating material 1 (or the vacuum heat insulating material 2) is disposed. The vacuum heat insulating material 1 is disposed in close contact with the outer wall surface of the inner box 60, for example. In the space between the inner box 60 and the outer box 61, a portion other than the vacuum heat insulating material 1 is filled with a urethane foam heat insulating material 62. Since the other part of the heat insulation box 3 is the same as that of a general refrigerator heat insulation box, its illustration and description are omitted.

本実施の形態では、安価に得ることができる真空断熱材１が用いられているため、断熱箱３を安価に得ることができる。また、本実施の形態では、発泡ウレタン断熱材６２等と比較して高い断熱性能を有する真空断熱材１が用いられているため、断熱材として発泡ウレタン断熱材のみが用いられた断熱箱と比較して、断熱性能の高い断熱箱３を得ることができる。したがって、断熱箱３を備えた冷蔵庫において消費電力を削減することができる。   In this Embodiment, since the vacuum heat insulating material 1 which can be obtained cheaply is used, the heat insulation box 3 can be obtained inexpensively. Moreover, in this Embodiment, since the vacuum heat insulating material 1 which has high heat insulation performance compared with the urethane foam heat insulating material 62 grade | etc., Is used, it compares with the heat insulation box where only the urethane foam heat insulating material was used as a heat insulating material. And the heat insulation box 3 with high heat insulation performance can be obtained. Therefore, power consumption can be reduced in the refrigerator provided with the heat insulating box 3.

なお、本実施の形態の断熱箱３では、真空断熱材１が内箱６０の外壁面に密着しているが、真空断熱材１は外箱６１の内壁面に密着していてもよい。また、真空断熱材１は、スペーサなどを用いることにより、内箱６０と外箱６１との間の空間に、内箱６０及び外箱６１のいずれにも密着しないように配置されていてもよい。   In the heat insulation box 3 of the present embodiment, the vacuum heat insulating material 1 is in close contact with the outer wall surface of the inner box 60, but the vacuum heat insulating material 1 may be in close contact with the inner wall surface of the outer box 61. Moreover, the vacuum heat insulating material 1 may be arrange | positioned so that it may not contact | adhere to any of the inner box 60 and the outer box 61 in the space between the inner box 60 and the outer box 61 by using a spacer etc. .

その他の実施の形態．
本発明は、上記実施の形態に限らず種々の変形が可能である。
例えば、上記実施の形態３では、冷熱源を備える冷蔵庫の断熱箱３に真空断熱材１、２が用いられた構成を例に挙げたが、本発明はこれに限られない。真空断熱材１、２は、温熱源を備える保温庫の断熱箱や、冷熱源及び温熱源を備えない断熱箱（例えば、クーラーボックス等）に用いることもできる。 Other embodiments.
The present invention is not limited to the above embodiment, and various modifications can be made.
For example, in Embodiment 3 described above, the configuration in which the vacuum heat insulating materials 1 and 2 are used in the heat insulating box 3 of the refrigerator provided with the cold heat source is taken as an example, but the present invention is not limited thereto. The vacuum heat insulating materials 1 and 2 can also be used for a heat insulating box with a heat source or a heat insulating box without a cold heat source and a heat source (for example, a cooler box).

また、真空断熱材１、２は、断熱箱だけでなく、空調機、車両用空調機、給湯機などの冷熱機器又は温熱機器の断熱部材として用いることもできる。また、真空断熱材１、２は、断熱箱のように所定の形状を備えた箱体だけでなく、変形自在な外袋及び内袋を備えた断熱袋や、その他の断熱容器にも用いることができる。   Moreover, the vacuum heat insulating materials 1 and 2 can be used not only as a heat insulating box but also as a heat insulating member for a cooling device or a heating device such as an air conditioner, a vehicle air conditioner, or a water heater. Moreover, the vacuum heat insulating materials 1 and 2 are used not only for a box having a predetermined shape like a heat insulating box, but also for a heat insulating bag having a deformable outer bag and an inner bag, and other heat insulating containers. Can do.

また、上記の各実施の形態や変形例は、互いに組み合わせて実施することが可能である。   In addition, the above embodiments and modifications can be implemented in combination with each other.

１、２ 真空断熱材、３ 断熱箱、１０ 芯材、２０、２１ 外包材、３０ 水分吸着剤、４０ 溶着シール部、５０ 加工装置、５１ 圧縮機構、５２ａ、５２ｂ 溶着機構、６０ 内箱、６１ 外箱、６２ 発泡ウレタン断熱材。   1, 2 Vacuum insulation material, 3 Heat insulation box, 10 Core material, 20, 21 Outer packaging material, 30 Moisture adsorbent, 40 Weld seal part, 50 Processing device, 51 Compression mechanism, 52a, 52b Weld mechanism, 60 Inner box, 61 Outer box, 62 Insulated urethane foam.

Claims (8)

繊維集合体からなる芯材を外包材で被覆し、
前記外包材の内部を減圧する前に、前記芯材及び前記外包材を外力で一体に圧縮して、前記芯材の厚みが圧縮前の１／１０以下となる圧縮状態とし、
前記圧縮状態において、前記外包材の周縁部のうち少なくとも相対する２辺に溶着シール部を形成し、
前記溶着シール部を形成した後に、前記外包材の内部を減圧して密封することを特徴とする真空断熱材の製造方法。 Cover the core material consisting of the fiber assembly with the outer packaging material,
Before decompressing the inside of the outer packaging material, the core material and the outer packaging material are integrally compressed with an external force so that the thickness of the core material is 1/10 or less of that before compression,
In the compressed state, a welded seal portion is formed on at least two opposite sides of the peripheral portion of the outer packaging material,
A vacuum heat insulating material manufacturing method, wherein after forming the welding seal portion, the inside of the outer packaging material is decompressed and sealed. 前記溶着シール部は、前記芯材との距離が５ｍｍ以下となるように形成することを特徴とする請求項１に記載の真空断熱材の製造方法。   The method for manufacturing a vacuum heat insulating material according to claim 1, wherein the welding seal portion is formed such that a distance from the core material is 5 mm or less. 請求項１又は請求項２に記載の真空断熱材の製造方法により製造された真空断熱材を備えることを特徴とする断熱箱。   A heat insulating box comprising a vacuum heat insulating material manufactured by the method for manufacturing a vacuum heat insulating material according to claim 1 or 2. 繊維集合体からなる芯材と、前記芯材を被覆する外包材とを備え、前記外包材の内部が減圧密封され、全体として１０ｍｍ以上の断熱材厚みを有する真空断熱材であって、
前記外包材は、周縁部に溶着シール部を有しており、
前記外包材の周縁部のうち少なくとも相対する２辺において、前記溶着シール部と前記芯材との距離が５ｍｍ以下であり、
前記溶着シール部が、前記芯材形状に沿って固定されており、
前記外包材の内部から前記芯材を取り出した場合における大気圧下での前記芯材の厚みは、前記断熱材厚みの１０倍以上であることを特徴とする真空断熱材。 A vacuum insulating material comprising a core material made of a fiber assembly and an outer packaging material covering the core material, the inside of the outer packaging material being sealed under reduced pressure, and having a heat insulating material thickness of 10 mm or more as a whole,
The outer packaging material has a welded seal portion at the periphery,
In at least two opposite sides of the peripheral portion of the outer packaging material, the distance between the welded seal portion and the core material is 5 mm or less,
The weld seal part is fixed along the core material shape,
The vacuum heat insulating material, wherein the thickness of the core material under atmospheric pressure when the core material is taken out from the outer packaging material is 10 times or more the thickness of the heat insulating material. 前記繊維集合体はグラスウールであることを特徴とする請求項４に記載の真空断熱材。   The vacuum heat insulating material according to claim 4, wherein the fiber assembly is glass wool. 前記芯材は、前記繊維集合体を結着させる結合剤を含まないことを特徴とする請求項４又は請求項５に記載の真空断熱材。   The vacuum heat insulating material according to claim 4, wherein the core material does not include a binder that binds the fiber assembly. 前記溶着シール部の幅が５０ｍｍ以上であることを特徴とする請求項４〜請求項６のいずれか一項に記載の真空断熱材。   The vacuum heat insulating material according to any one of claims 4 to 6, wherein a width of the welding seal portion is 50 mm or more. 請求項４〜請求項７のいずれか一項に記載の真空断熱材を備えることを特徴とする断熱箱。   A heat insulating box comprising the vacuum heat insulating material according to any one of claims 4 to 7.
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