JP5753676B2 - Non-combustible spray insulation and its construction method - Google Patents
Non-combustible spray insulation and its construction method Download PDFInfo
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- 239000007921 spray Substances 0.000 title claims description 64
- 238000010276 construction Methods 0.000 title claims description 31
- 238000009413 insulation Methods 0.000 title claims description 24
- 239000011810 insulating material Substances 0.000 claims description 76
- 229920003002 synthetic resin Polymers 0.000 claims description 44
- 239000000057 synthetic resin Substances 0.000 claims description 44
- 229920001577 copolymer Polymers 0.000 claims description 42
- 239000007787 solid Substances 0.000 claims description 38
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 35
- 239000011490 mineral wool Substances 0.000 claims description 33
- 238000005507 spraying Methods 0.000 claims description 33
- 239000004568 cement Substances 0.000 claims description 25
- 239000000839 emulsion Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 18
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 16
- 239000005977 Ethylene Substances 0.000 claims description 16
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 16
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 14
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 14
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 12
- -1 alkyl acrylate ester Chemical class 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 11
- 229920001567 vinyl ester resin Polymers 0.000 claims description 11
- 239000012774 insulation material Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 7
- 150000004668 long chain fatty acids Chemical class 0.000 claims description 6
- 229920000800 acrylic rubber Polymers 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- YPIFGDQKSSMYHQ-UHFFFAOYSA-N 7,7-dimethyloctanoic acid Chemical compound CC(C)(C)CCCCCC(O)=O YPIFGDQKSSMYHQ-UHFFFAOYSA-N 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 239000011230 binding agent Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 239000000835 fiber Substances 0.000 description 10
- 239000006260 foam Substances 0.000 description 10
- 239000000843 powder Substances 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000006378 damage Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 239000010451 perlite Substances 0.000 description 3
- 235000019362 perlite Nutrition 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010040844 Skin exfoliation Diseases 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000002557 mineral fiber Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
Description
本発明は、ロックウール系不燃吹付け断熱材及びその施工方法に関する。 The present invention relates to a rock wool non-combustible spraying heat insulating material and a construction method thereof.
従来の産業・工業施設用、ビル建築・設備用、住宅用断熱材を大きく分類すると、予め工場などで製造されたボード状の断熱材と、現場で発泡もしくは吹付け等により施工される断熱材に分けられる。
ボード状断熱材としては、グラスウール、ロックウールなどの繊維系及びウレタンフォーム、ポリスチレンフォーム、フェノールフォームなどの発泡系が使用されている。
ボード状断熱材は、不燃性で断熱性に優れた性能を有するものもあり、扱いやすいが、複雑な形状に対して、施工現場において加工する必要があり、また加工時に発生する端材が廃棄物になり環境に好ましくない。さらに目地やインサルピン等の金物の露出による、ヒートブリッジによる熱損失が発生し、断熱性能を低下させる。
Conventional insulation materials for industrial / industrial facilities, building construction / equipment, and housing can be broadly classified into board-like insulation materials manufactured in advance in factories and the like, and insulation materials constructed by foaming or spraying on site. It is divided into.
As the board-like heat insulating material, fiber systems such as glass wool and rock wool and foam systems such as urethane foam, polystyrene foam and phenol foam are used.
Some board-like thermal insulation materials are nonflammable and have excellent thermal insulation properties. They are easy to handle, but complex shapes need to be processed at the construction site, and scraps generated during processing are discarded. It becomes a thing and is not preferable for the environment. Furthermore, heat loss due to the heat bridge due to the exposure of hardware such as joints and insulpine occurs, which lowers the heat insulation performance.
一方、吹付け断熱材としては、吹付け硬質ウレタンフォーム、又は吹付けロックウールが一般的に広く使用されている。
吹付け断熱材は、現場施工であるため、断熱設計にあわせて自由に厚さの調整が可能である。また、複雑な形状に対しても断熱層を連続的に隙間なく形成することが出来るため、目地が発生することなく、インサルピン等の金物の露出がないため、ヒートブリッジによる熱損失が抑えられる。
さらに下地と密着した断熱層を形成できるため、界面に隙間がなく、また、ロックウール繊維系の吹付け断熱材については保水（湿）性が高いため、下地表面での結露が生じにくいなどの特徴がある。
On the other hand, sprayed rigid urethane foam or sprayed rock wool is generally widely used as the spray insulation.
Since the spray insulation is on-site construction, the thickness can be adjusted freely according to the insulation design. In addition, since the heat insulating layer can be continuously formed even with a complicated shape without a gap, joints are not generated, and there is no exposure of hardware such as insulpine, so that heat loss due to the heat bridge can be suppressed.
Furthermore, since a heat insulating layer can be formed in close contact with the base, there is no gap at the interface, and the rock wool fiber-based spray heat insulating material has high water retention (humidity), so that condensation on the base surface is unlikely to occur. There are features.
従前の吹付け硬質ウレタンフォームは、高い断熱性能（λ≒０．０２４Ｗ／ｍ・Ｋ，ただし、λは熱伝導率）を持つ一方で、発泡剤にフロン又は代替フロンが使用されていたため、オゾン層破壊や地球温暖化に影響を与え、また、材質が可燃性であるため、溶接や溶断を行なう際の火花による建設中の火災が多く発生し、竣工後の火災においても被害の拡大を助長する大きな問題点を抱いていた。 Conventional sprayed rigid urethane foam has high heat insulation performance (λ≈0.024 W / m · K, where λ is thermal conductivity), while chlorofluorocarbon or alternative chlorofluorocarbon was used as the foaming agent. It affects layer destruction and global warming, and because the material is flammable, many fires are under construction due to sparks when welding and fusing, and it helps to expand the damage even after the completion of construction. I had a big problem.
一方、吹付けロックウールは、耐火被覆として多く用いられているため、汎用性が高く、不燃性吹付け断熱材としてビル建築に用いられることが多い。
従来、不燃吹付けロックウール断熱材の結合材として、セメント等の無機質結合材が用いられてきており、無機質結合材では、不燃性の確保が容易であり、耐久性、耐候性に優れている。
しかし、セメント等の無機質結合材を用いた吹付けロックウール断熱材は、有機系の発泡断熱材に比べると、見かけ密度が高く（吹付けロックウールの場合：見かけ密度＝０．２８ｇ／ｃｍ3以上）、断熱性もフロン使用ウレタンフォームの１／２以下（λ≒０．０５Ｗ／ｍ・Ｋ程度）である。また、セメント等の無機質結合材を用いると、水を大量に使い乾燥が遅いために、適用部位や対象が限定され、時には、かびや部材のそり等の問題を誘発するおそれがある。さらに、無機質結合材では弾力性が低く、外力（衝撃や振動等）に対して損傷しやすく脆い、初期の粘着性が低いため下地との付着が十分に得られ難いなどの問題があり、十分な結合（接着）を得るためには、結合材の割合を増やす必要があるが、熱架橋となる部分が多くなるため、低熱伝導率を得られ難いという課題があった。
また、吹付けロックウール層の表面にセメントスラリー層を設け、その上層に石膏ボード等の貼り付け性を向上させる技術（特許文献１）、吹付けロックウール層に、下塗り材として合成樹脂エマルションを塗布し、その上層に軽量モルタルを施工する技術（特許文献２）も知られている。
On the other hand, spray rock wool is widely used as a fireproof coating, so it has high versatility and is often used in building construction as a nonflammable spray heat insulating material.
Conventionally, an inorganic binder such as cement has been used as a binder for non-combustible spray rock wool insulation, and it is easy to ensure nonflammability, and is excellent in durability and weather resistance. .
However, the spray rock wool insulation using an inorganic binder such as cement has a higher apparent density than the organic foam insulation (in the case of spray rock wool: apparent density = 0.28 g / cm 3). In addition, the heat insulating property is also ½ or less (λ≈0.05 W / m · K) of chlorofluorocarbon-based urethane foam. In addition, when an inorganic binding material such as cement is used, since a large amount of water is used and drying is slow, application sites and objects are limited, and there is a possibility of inducing problems such as fungi and warping of members. Furthermore, inorganic binders have problems such as low elasticity, are easily damaged by external forces (impacts, vibrations, etc.), are brittle, and the initial adhesiveness is low, making it difficult to obtain sufficient adhesion to the substrate. In order to obtain a good bond (adhesion), it is necessary to increase the proportion of the binder, but there is a problem that it is difficult to obtain a low thermal conductivity because there are many portions that are thermally crosslinked.
In addition, a cement slurry layer is provided on the surface of the spray rock wool layer, and a technique (Patent Document 1) for improving the adhesive property of gypsum board or the like on the upper layer, and a synthetic resin emulsion as a primer for the spray rock wool layer. The technique (patent document 2) which apply | coats and constructs a lightweight mortar on the upper layer is also known.
しかし、これらの吹付けロックウール断熱材はいずれも断熱性が十分でなく、弾力性、初期粘着性が低いなどの問題は解決できていない。
また、吹付けロックウール断熱材の結合材として合成樹脂の使用が考えられるが、合成樹脂自体が可燃性である場合には断熱材を不燃性とすることは困難であった。
従って、本発明の課題は、優れた断熱性と不燃性とを両立できるロックウール系不燃吹付け断熱材及びその施工方法を提供することにある。
However, none of these sprayed rock wool insulation materials have sufficient heat insulation properties, and problems such as low elasticity and low initial tackiness cannot be solved.
In addition, it is conceivable to use a synthetic resin as a binder for the spray rock wool heat insulating material. However, when the synthetic resin itself is flammable, it is difficult to make the heat insulating material non-flammable.
Therefore, the subject of this invention is providing the rock wool type | system | group nonflammable spraying heat insulating material which can make the outstanding heat insulation and nonflammability compatible, and its construction method.
そこで本発明者は、吹付けロックウール断熱材の結合材に合成樹脂を使用し、その不燃性と断熱性との両立を図るべく種々検討したところ、合成樹脂として特定の共重合体エマルションを採用し、断熱材中の合成樹脂量と見かけ密度を一定の範囲に調整することにより、優れた断熱性を有するとともに不燃性を有し、弾力性にも優れた吹付け断熱材が得られることを見出した。また、当該断熱材層の表面に、セメント、無機質軽量骨材及び合成樹脂を有する表面仕上げ層を形成すれば、優れた耐衝撃性、表面特性を有する不燃断熱材が得られることを見出した。 Therefore, the present inventor used a synthetic resin as a binder for spray rock wool insulation, and made various studies to achieve both incombustibility and heat insulation, and adopted a specific copolymer emulsion as the synthetic resin. By adjusting the amount of the synthetic resin and the apparent density in the heat insulating material to a certain range, it is possible to obtain a spray heat insulating material having excellent heat insulation and nonflammability and excellent elasticity. I found it. Further, it has been found that if a surface finishing layer having cement, inorganic lightweight aggregate and synthetic resin is formed on the surface of the heat insulating material layer, an incombustible heat insulating material having excellent impact resistance and surface characteristics can be obtained.
すなわち、本発明は、以下に係るものである。
［１］ロックウールを合成樹脂で結合してなる不燃吹付け断熱材であって、（ａ）当該合成樹脂が、エチレン、ブタジエン、塩化ビニル、スチレン、酢酸ビニル、炭素数４以上の長鎖脂肪酸ビニルエステル、シロキサン、アクリロニトリル、アクリル酸アルキルエステル及びメタクリル酸アルキルエステル並びにこれらの誘導体から選ばれる２種以上の共重合体であり、（ｂ）当該合成樹脂の含有量が、断熱材中固形分換算で１．５〜８質量％であり、（ｃ）断熱材の見かけ密度が０．１２〜０．３０ｇ／ｃｍ3である不燃吹付け断熱材。
That is, the present invention relates to the following.
[1] A non-combustible spray heat insulating material obtained by bonding rock wool with a synthetic resin, wherein (a) the synthetic resin is ethylene, butadiene, vinyl chloride, styrene, vinyl acetate, a long chain fatty acid having 4 or more carbon atoms It is a copolymer of two or more selected from vinyl ester, siloxane, acrylonitrile, acrylic acid alkyl ester, methacrylic acid alkyl ester, and derivatives thereof, and (b) the content of the synthetic resin is converted to solid content in the heat insulating material. 1.5 to 8% by mass, and (c) the non-combustible spraying heat insulating material having an apparent density of the heat insulating material of 0.12 to 0.30 g / cm 3 .
［２］上記［１］の不燃吹付け断熱材を基材層とし、その表面に次の（Ａ）〜（Ｃ）を有する表面仕上げ層が形成されていることを特徴とする不燃吹付け断熱材。
（Ａ）表面仕上げ層の原料比率が、セメント２０〜７０質量％、無機質軽量骨材２９〜７３質量％、及び合成樹脂を固形分換算で１〜７質量％であり、
（Ｂ）当該合成樹脂が、エチレン、ブタジエン、塩化ビニル、スチレン、酢酸ビニル、炭素数４以上の長鎖脂肪酸ビニルエステル、シロキサン、アクリロニトリル、アクリル酸アルキルエステル及びメタクリル酸アルキルエステル並びにこれらの誘導体から選ばれる２種以上の共重合体であり、
（Ｃ）表面仕上げ層の吹付け量が１．２ｋｇ／ｍ2以下。
[2] A non-combustible spray heat insulating material characterized in that the non-combustible spray heat insulating material of [1] is used as a base material layer, and a surface finishing layer having the following (A) to (C) is formed on the surface thereof: Wood.
(A) The raw material ratio of the surface finish layer is 20 to 70% by mass of cement, 29 to 73% by mass of inorganic lightweight aggregate, and 1 to 7% by mass in terms of solid content.
(B) The synthetic resin is selected from ethylene, butadiene, vinyl chloride, styrene, vinyl acetate, long chain fatty acid vinyl ester having 4 or more carbon atoms, siloxane, acrylonitrile, alkyl acrylate ester, alkyl methacrylate ester and derivatives thereof. Two or more kinds of copolymers,
(C) The spray amount of the surface finish layer is 1.2 kg / m 2 or less.
［３］上記［１］の不燃吹付け断熱材の施工方法であって、合成樹脂エマルションとロックウールとを別々に吹付けガンに送り、吹付けガンで両者を混合するとともに、この混合物中の固形分比率を４０〜９８質量％とし、吹付けガンから吐出させ、被吹付け物に吹付けることを特徴とする不燃吹付け断熱材の施工方法。 [3] The construction method of the non-combustible spray insulation material according to [1], wherein the synthetic resin emulsion and the rock wool are separately sent to the spray gun, and both are mixed with the spray gun. A construction method of a non-combustible spraying heat insulating material characterized in that a solid content ratio is 40 to 98% by mass, discharged from a spray gun, and sprayed onto an object to be sprayed.
［４］上記［２］の不燃吹付け断熱材の施工方法であって、上記［２］の表面仕上げ層用材料を混合して固形分比率を１０〜３５質量％に調整し、調整した材料を吹付けガンに送り、吹付け量が１．２ｋｇ／ｍ2以下となるように、上記［３］の施工法で形成された不燃吹付け断熱材の表面に吹付け施工することを特徴とする吹付け断熱材の施工方法。 [4] The construction method of the non-combustible spray heat insulating material of [2] above, wherein the material for the surface finish layer of [2] above is mixed to adjust the solid content ratio to 10 to 35% by mass, and the adjusted material Is sprayed onto the surface of the non-combustible spray insulation material formed by the construction method [3] so that the spray amount is 1.2 kg / m 2 or less. How to install spray insulation.
本発明のロックウール系吹付け断熱材は、合成樹脂を結合材としているにもかかわらず、不燃性である。合成樹脂を採用するため、結合材として接着性が高く、少量での吹付け施工が可能である。また、微細なミストでの吹付けができるため、繊維同士が点で結合され、その結果熱架橋となる部分が少なく低熱伝導率を得ることができるものと考えられる。
さらに、弾力性のある粘り強い断熱層が形成でき、外力（衝撃や振動等）に対しても無機質結合材を用いた吹付け断熱材より優位である。
本発明においては、合成樹脂にエマルションを使用しており、溶剤型ではないため、引火の恐れが無く安全であり、また、吹付け施工後に清掃を怠ると固結するため、入念な機材の手入が必要とされる水硬性無機質結合材と比較して、エマルションの場合は、清掃が簡易である。連続的に施工する場合、毎日の清掃を省略することができる。
The rockwool spray insulation of the present invention is nonflammable despite the use of synthetic resin as a binder. Since a synthetic resin is used, it has high adhesiveness as a binder and can be sprayed in a small amount. Moreover, since it can spray with a fine mist, it is thought that a fiber is couple | bonded by a point and, as a result, there are few parts which become a thermal bridge | crosslinking and a low thermal conductivity can be obtained.
Furthermore, an elastic and tenacious heat insulating layer can be formed, and it is superior to a spray heat insulating material using an inorganic binder for external force (impact, vibration, etc.).
In the present invention, an emulsion is used as a synthetic resin and it is not a solvent type, so there is no danger of ignition and it is safe. In the case of an emulsion, cleaning is simple as compared with a hydraulic inorganic binder that requires insertion. In the case of continuous construction, daily cleaning can be omitted.
本発明の不燃吹付け断熱材は、ロックウールを合成樹脂で結合してなるものである。ロックウールは、吹付け用に用いられるものであればよく、ロックウール粒状綿が用いられる。ロックウールを用いることにより、耐熱性が高く、発熱性試験において有害な変形等が生じない断熱材が得られる。好ましいロックウールの繊維の平均太さは直径１〜７μｍであり、さらに好ましい繊維の平均太さは直径３〜７μｍである。また、用いるロックウール粒状綿は、密度が４０〜１５０ｋｇ/ｍ3のものが好ましく、熱伝導率が０．０４４Ｗ/ｍ・Ｋ以下であることが好ましい。
なお、ロックウール粒状綿の密度、熱伝導率および繊維の平均太さは、それぞれＪＩＳ Ａ ９５０４「人造鉱物繊維保温材」６．４寸法及び密度、６．５熱伝導率および６．７繊維の平均太さに規定される方法により測定できる。
断熱材中のロックウールの含有量は固形分換算で９２〜９８．５質量％が好ましく、特に９４〜９６質量％が好ましい。ここで、固形分換算の質量％とは、断熱材中の各固形分の合計に対する質量％を意味する。
The non-combustible spray heat insulating material of the present invention is formed by combining rock wool with a synthetic resin. Rock wool should just be used for spraying, and rock wool granular cotton is used. By using rock wool, it is possible to obtain a heat insulating material that has high heat resistance and does not cause harmful deformation in the exothermic test. The preferred average thickness of rock wool fibers is 1 to 7 μm in diameter, and the more preferred average thickness of fibers is 3 to 7 μm in diameter. The rock wool granular cotton used preferably has a density of 40 to 150 kg / m 3 and a thermal conductivity of 0.044 W / m · K or less.
The density, thermal conductivity, and average fiber thickness of rock wool granular cotton are JIS A 9504 “artificial mineral fiber heat insulating material” 6.4 size and density, 6.5 thermal conductivity, and 6.7 fibers, respectively. It can be measured by the method defined by the average thickness.
The content of rock wool in the heat insulating material is preferably 92 to 98.5% by mass, and particularly preferably 94 to 96% by mass in terms of solid content. Here, the mass% in terms of solid content means mass% with respect to the total of each solid content in the heat insulating material.
本発明に用いられる（ａ）合成樹脂は、エチレン、ブタジエン、塩化ビニル、スチレン、酢酸ビニル、炭素数４以上の長鎖脂肪酸ビニルエステル、シロキサン、アクリロニトリル、アクリル酸アルキルエステル及びメタクリル酸アルキルエステル並びにこれらの誘導体から選ばれる２種以上の共重合体である。これらの共重合体を使用することにより、断熱材に不燃性を付与できる。ここで、共重合体は、前記モノマーの２種又は３種の共重合体であるのが好ましい。さらに、（ａ）合成樹脂は、アクリロニトリル・スチレン共重合体、スチレン・アクリル酸アルキルエステル共重合体、エチレン・塩化ビニル・酢酸ビニル共重合体、酢酸ビニル・ネオデカン酸ビニルエステル共重合体、酢酸ビニル・アクリル酸アルキルエステル共重合体、アクリル酸アルキルエステル・シリコーン共重合体及びエチレン・酢酸ビニル共重合体から選ばれる共重合体であるのが好ましく、特にスチレン・アクリル酸アルキルエステル共重合体、アクリロニトリル・スチレン共重合体であるのが、耐候性及び耐水性の点から好ましい。前記モノマーの誘導体としては、合成樹脂がエマルション又は再乳化形粉末樹脂として入手できるものであればよい。 The synthetic resin (a) used in the present invention includes ethylene, butadiene, vinyl chloride, styrene, vinyl acetate, long chain fatty acid vinyl ester having 4 or more carbon atoms, siloxane, acrylonitrile, alkyl acrylate ester and alkyl methacrylate ester, and these Two or more kinds of copolymers selected from the derivatives of By using these copolymers, non-flammability can be imparted to the heat insulating material. Here, the copolymer is preferably a copolymer of two or three of the monomers. Further, (a) synthetic resins are acrylonitrile / styrene copolymer, styrene / alkyl acrylate copolymer, ethylene / vinyl chloride / vinyl acetate copolymer, vinyl acetate / neodecanoic acid vinyl ester copolymer, vinyl acetate. A copolymer selected from an acrylic acid alkyl ester copolymer, an acrylic acid alkyl ester / silicone copolymer, and an ethylene / vinyl acetate copolymer is preferable. Particularly, a styrene / acrylic acid alkyl ester copolymer, acrylonitrile. A styrene copolymer is preferable from the viewpoint of weather resistance and water resistance. As the derivative of the monomer, any synthetic resin can be used as an emulsion or a re-emulsified powder resin.
（ｂ）合成樹脂の含有量は、断熱材中に固形分換算で１．５〜８質量％であり、より好ましくは４〜６質量％である。合成樹脂の含有量が１．５質量％未満では、ロックウール同士の結合力が低下し、断熱材の保形性及び弾力性が低下する。一方、合成樹脂の含有量が８質量％を超えると、総発熱量の増加により不燃性が得られない。ここで、固形分換算の質量％とは、断熱材中の各固形分の合計に対する質量％を意味する。
なお、本発明において不燃性であるとする判断基準は、ＪＩＳ Ａ ５４３０付属書ＪＡの発熱性試験による総発熱量が８．０ＭＪ／ｍ2以下である。
(B) Content of a synthetic resin is 1.5-8 mass% in conversion of solid content in a heat insulating material, More preferably, it is 4-6 mass%. When the content of the synthetic resin is less than 1.5% by mass, the bonding strength between the rock wools is lowered, and the shape retention and elasticity of the heat insulating material are lowered. On the other hand, if the content of the synthetic resin exceeds 8% by mass, nonflammability cannot be obtained due to an increase in the total calorific value. Here, the mass% in terms of solid content means mass% with respect to the total of each solid content in the heat insulating material.
In the present invention, the criterion for determining nonflammability is that the total calorific value according to the exothermic test of JIS A 5430 appendix JA is 8.0 MJ / m 2 or less.
（ｃ）断熱材の見かけ密度（かさ密度）は、０．１２〜０．３０ｇ／ｃｍ3であり、より好ましくは０．１４〜０．２０ｇ／ｃｍ3である。見かけ密度が０．１２ｇ／ｃｍ3未満では、施工面の付着力（１５ｇ／ｃｍ2以上）、断熱材の保形性及び弾力性が低下する。一方、見かけ密度が０．３０ｇ／ｃｍ3を超えると、熱伝導率が上昇し、断熱性が低下する。また、総発熱量の増加により不燃性が得られない。
なお、見かけ密度は、ＪＩＳ Ａ １４７６「建築材料の含水率測定方法」８．４項に規定される乾燥密度の測定法により測定できる。
(C) apparent density (bulk density) of the heat insulating material is 0.12~0.30g / cm 3, more preferably 0.14~0.20g / cm 3. When the apparent density is less than 0.12 g / cm 3 , the adhesion (15 g / cm 2 or more) of the construction surface and the shape retention and elasticity of the heat insulating material are lowered. On the other hand, when the apparent density exceeds 0.30 g / cm 3 , the thermal conductivity increases and the heat insulating property decreases. Moreover, nonflammability cannot be obtained due to an increase in the total calorific value.
The apparent density can be measured by a dry density measuring method defined in 8.4 of JIS A 1476 “Method for measuring moisture content of building materials”.
本発明の断熱材の厚さは、施工対象によって異なるが、断熱性能、施工性等から、５〜２００ｍｍが好ましく、１０〜１５０ｍｍがより好ましい。 Although the thickness of the heat insulating material of this invention changes with construction objects, 5-200 mm is preferable and 10-150 mm is more preferable from heat insulation performance, workability, etc.
本発明の断熱材には、その表面に表面仕上げ層が形成されていてもよい。すなわち、前記の不燃吹付け断熱材を基材層とし、その表面に次の（Ａ）〜（Ｃ）を有する表面仕上げ層が形成されている不燃吹付け断熱材としてもよい。
（Ａ）表面仕上げ層の原料比率が、セメント２０〜７０質量％、無機質軽量骨材２９〜７３質量％、及び合成樹脂を固形分換算で１〜７質量％であり、
（Ｂ）当該合成樹脂が、エチレン、ブタジエン、塩化ビニル、スチレン、酢酸ビニル、炭素数４以上の長鎖脂肪酸ビニルエステル、シロキサン、アクリロニトリル、アクリル酸アルキルエステル及びメタクリル酸アルキルエステル並びにこれらの誘導体から選ばれる２種以上の共重合体であり、
（Ｃ）表面仕上げ層の吹付け量が１．２ｋｇ／ｍ2以下。
A surface finish layer may be formed on the surface of the heat insulating material of the present invention. That is, the non-combustible spraying heat insulating material may be a non-combustible spraying heat insulating material in which a surface finishing layer having the following (A) to (C) is formed on the surface thereof.
(A) The raw material ratio of the surface finish layer is 20 to 70% by mass of cement, 29 to 73% by mass of inorganic lightweight aggregate, and 1 to 7% by mass in terms of solid content.
(B) The synthetic resin is selected from ethylene, butadiene, vinyl chloride, styrene, vinyl acetate, long chain fatty acid vinyl ester having 4 or more carbon atoms, siloxane, acrylonitrile, alkyl acrylate ester, alkyl methacrylate ester and derivatives thereof. Two or more kinds of copolymers,
(C) The spray amount of the surface finish layer is 1.2 kg / m 2 or less.
前記断熱材からなる基材層の表面に表面仕上げ層を設けることにより、あらわし仕様における意匠性が向上し、外部からの衝撃による損傷を防ぐことができる。
本発明においては、断熱材への衝撃による損傷の防止及び、断熱材と同様に粘り強さを付与し、かつ前記の不燃吹付け断熱材と組合わせた場合においても、不燃性の性能を有する表面仕上げ層とするため、（Ａ）〜（Ｃ）の構成とした。
By providing the surface finish layer on the surface of the base material layer made of the heat insulating material, the design properties in the specification are improved, and damage due to external impact can be prevented.
In the present invention, it is possible to prevent damage due to impact on the heat insulating material, and to impart tenacity as in the case of the heat insulating material and to have a non-flammable performance even when combined with the non-combustible spray heat insulating material. In order to make it a finishing layer, it was set as the structure of (A)-(C).
表面仕上げ層には、セメントが用いられ、その使用量は２０〜７０質量％が好ましく、より好ましくは３１〜４７質量％である。ここで、質量％とは、表面仕上げ層中の各固形分の合計に対する質量％を意味する。
表面仕上げ層にセメントを用いることで、吹付け初期の表面硬さを確保でき、外部からの衝撃による損傷を防ぐことができる。好ましくは、白色セメントを用いることにより、原料を白色系に統一でき、意匠性を向上させることができる。セメントの種類としては、白色ポルトランドセメントや普通ポルトランドセメント等のポルトランドセメント、高炉セメント、シリカセメント、フライアッシュセメント、エコセメント等が使用できる。
セメントが２０質量％未満では、仕上げ層の硬化が不十分となり、十分な強度発現が得られない。一方、セメントが７０質量％を超えると、仕上げ層が重くなり、断熱材とのはく離等が生じるおそれがある。また、セメント量が多すぎると、セメントの硬化や乾燥による収縮により、仕上げ層に亀裂が生じるおそれがある。
Cement is used for the surface finish layer, and the amount used is preferably 20 to 70% by mass, more preferably 31 to 47% by mass. Here, mass% means mass% with respect to the total of each solid content in the surface finish layer.
By using cement for the surface finish layer, the surface hardness at the initial stage of spraying can be ensured, and damage due to impact from the outside can be prevented. Preferably, by using white cement, the raw materials can be unified into a white system, and the design can be improved. As the type of cement, white Portland cement, Portland cement such as ordinary Portland cement, blast furnace cement, silica cement, fly ash cement, eco cement, and the like can be used.
When the cement is less than 20% by mass, the finishing layer is not sufficiently cured and sufficient strength cannot be obtained. On the other hand, if the cement content exceeds 70% by mass, the finish layer becomes heavy, and there is a risk of peeling off from the heat insulating material. Moreover, when there is too much cement amount, there exists a possibility that a crack may arise in a finishing layer by shrinkage | contraction by hardening or drying of cement.
表面仕上げ層には、無機質軽量骨材が用いられる。当該無機質軽量骨材としては、パーライトやシラスバルーンなどのガラス質発泡体、フライアッシュ、珪藻土、シリカパウダー及びシリカフュームなどの非晶質粉末、けい酸カルシウム水和物（トバモライト、ゾノトライト等）の多孔性凝集体等が挙げられるが、このうちガラス質発泡体が好ましく、特にパーライトが好ましい。
無機質軽量骨材の形状としては、粒径が０．５ｍｍを上回らないことが好ましく、さらに４５μｍ通過率が９５％以上の比較的細かい粒子のものが好ましい。ここで、「粒径が０．５ｍｍを上回らない」とはＪＩＳ Ａ１１０２［骨材のふるい分け試験方法］に準じて公称目開き５００μｍのふるいを用いてふるい分け試験をおこない当該ふるいを通過する質量分率（通過率）が１００％であることを云い、「４５μｍ通過率が９５％以上」とは公称目開き４５μｍのふるいを用いて前記同様にふるい分け試験をおこない当該ふるいを通過する質量分率（通過率）が９５％以上であることを云う。このような細かい粒子を用いることにより、表面仕上げ層の吹付けにおいて、ポーラスな断熱材表面に対し固形分のノリがよく、仕上げ層を容易に形成することができる。
さらに、単位容積質量（ＪＩＳ Ａ ５００７ パーライトに規定される測定方法による）が０．２ｋｇ／Ｌ〜０．３５ｋｇ／Ｌのパーライト等の無機質軽量骨材粉末を使用することで表面仕上げ層の見かけ密度を低減することができ、表面仕上げ層と断熱材のはく離を抑えることができる。
An inorganic lightweight aggregate is used for the surface finish layer. The inorganic lightweight aggregate includes porous materials such as glassy foams such as perlite and shirasu balloon, amorphous powders such as fly ash, diatomaceous earth, silica powder and silica fume, and calcium silicate hydrates (tobermorite, zonotlite, etc.) Aggregates and the like can be mentioned, and among these, glassy foams are preferable, and pearlite is particularly preferable.
As the shape of the inorganic lightweight aggregate, it is preferable that the particle diameter does not exceed 0.5 mm, and further, a relatively fine particle having a 45 μm passage rate of 95% or more is preferable. Here, “the particle size does not exceed 0.5 mm” means a mass fraction that passes through the sieve after performing a screening test using a sieve having a nominal aperture of 500 μm in accordance with JIS A1102 [Aggregate Screening Test Method]. (Passage rate) is 100%, and “45 μm passage rate is 95% or more” means that a sieve with a nominal opening of 45 μm is subjected to the same screening test as described above, and the mass fraction (passage) Rate) is 95% or more. By using such fine particles, in the spraying of the surface finish layer, the solid content is good on the surface of the porous heat insulating material, and the finish layer can be easily formed.
Furthermore, the apparent density of the surface finish layer is obtained by using inorganic lightweight aggregate powder such as pearlite having a unit volume mass (measured by JIS A 5007 perlite) of 0.2 kg / L to 0.35 kg / L. And the peeling between the surface finish layer and the heat insulating material can be suppressed.
無機質軽量骨材は、表面仕上げ層中に２９〜７３質量％用いるのが好ましく、特に５０〜６５質量％用いるのが好ましい。無機質軽量骨材が２９質量％未満では、表面仕上げ層の見かけ密度が高くなり、表面仕上げ層と断熱材のはく離を生じ易くなる。一方、無機質軽量骨材が７３質量％を超えると、表面仕上げ層の強度が十分に得られず、衝撃性能が低下する。ここで、質量％とは、表面仕上げ層中の各固形分の合計に対する質量％を意味する。 The inorganic lightweight aggregate is preferably used in an amount of 29 to 73% by mass, particularly preferably 50 to 65% by mass, in the surface finish layer. When the inorganic lightweight aggregate is less than 29% by mass, the apparent density of the surface finish layer becomes high, and the surface finish layer and the heat insulating material are easily peeled off. On the other hand, when the inorganic lightweight aggregate exceeds 73% by mass, the strength of the surface finish layer cannot be sufficiently obtained, and the impact performance is lowered. Here, mass% means mass% with respect to the total of each solid content in the surface finish layer.
表面仕上げ層に用いられる合成樹脂は、エチレン、ブタジエン、塩化ビニル、スチレン、酢酸ビニル、炭素数４以上の長鎖脂肪酸ビニルエステル、シロキサン、アクリロニトリル、アクリル酸アルキルエステル及びメタクリル酸アルキルエステル並びにこれらの誘導体から選ばれる２種以上の共重合体である。これらの共重合体を使用することにより、表面仕上げ層に粘り強さを付与できる。ここで、共重合体は、前記モノマーの２種又は３種の共重合体であるのが好ましい。さらに、合成樹脂は、アクリロニトリル・スチレン共重合体、スチレン・アクリル酸アルキルエステル共重合体、エチレン・塩化ビニル・酢酸ビニル共重合体、酢酸ビニル・ネオデカン酸ビニルエステル共重合体、酢酸ビニル・アクリル酸アルキルエステル共重合体、アクリル酸アルキルエステル・シリコーン共重合体及びエチレン・酢酸ビニル共重合体から選ばれる共重合体であるのが好ましく、特にアクリロニトリル・スチレン共重合体、スチレン・アクリル酸アルキルエステル共重合体であるのが、耐候性及び耐水性の点から好ましい。また前記モノマーの誘導体としては、合成樹脂がエマルション又は再乳化形粉末樹脂として入手できるものであればよい。 Synthetic resins used for the surface finishing layer are ethylene, butadiene, vinyl chloride, styrene, vinyl acetate, long chain fatty acid vinyl esters having 4 or more carbon atoms, siloxane, acrylonitrile, alkyl acrylates and alkyl methacrylates, and derivatives thereof. Two or more types of copolymers selected from By using these copolymers, tenacity can be imparted to the surface finish layer. Here, the copolymer is preferably a copolymer of two or three of the monomers. Synthetic resins include acrylonitrile / styrene copolymer, styrene / alkyl acrylate copolymer, ethylene / vinyl chloride / vinyl acetate copolymer, vinyl acetate / neodecanoic acid vinyl ester copolymer, vinyl acetate / acrylic acid. A copolymer selected from an alkyl ester copolymer, an acrylic acid alkyl ester / silicone copolymer, and an ethylene / vinyl acetate copolymer is preferable, and in particular, an acrylonitrile / styrene copolymer and a styrene / acrylic acid alkyl ester copolymer. A polymer is preferred from the viewpoint of weather resistance and water resistance. Moreover, as a derivative | guide_body of the said monomer, the synthetic resin should just be obtained as an emulsion or a re-emulsification type powder resin.
合成樹脂は、表面仕上げ層中に固形分換算で１〜７質量％含有するのが好ましく、特に２〜５質量％含有するのが好ましい。ここで、質量％とは、表面仕上げ層中の各固形分の合計に対する質量％を意味する。合成樹脂（固形分）が１質量％未満では、無機質軽量骨材同士の結合力が低下し、粘り強さが低下する。一方、合成樹脂（固形分）が７質量％を超えると、総発熱量の増加により不燃性が得られない。 The synthetic resin is preferably contained in the surface finish layer in an amount of 1 to 7% by mass in terms of solid content, particularly preferably 2 to 5% by mass. Here, mass% means mass% with respect to the total of each solid content in the surface finish layer. When the synthetic resin (solid content) is less than 1% by mass, the bonding strength between the inorganic lightweight aggregates decreases, and the tenacity decreases. On the other hand, if the synthetic resin (solid content) exceeds 7% by mass, nonflammability cannot be obtained due to an increase in the total calorific value.
また表面仕上げ層の吹付け量は、意匠性や脱落防止の点から、１．２ｋｇ／ｍ2以下とするのが好ましく、さらに０．１〜１．２ｋｇ／ｍ2が好ましく、特に０．３〜０．８ｋｇ／ｍ2が好ましい。吹付け量が少なすぎると意匠性が十分でなく、多すぎると、吹付け時に仕上げ層スラリーが定着せず流れ出し、脱落の可能性が高くなる。 Spraying amount of addition surface finish layer, from the viewpoint of designability and drop-off prevention, it is preferable to be 1.2 kg / m 2 or less, preferably more 0.1~1.2kg / m 2, in particular 0.3 ˜0.8 kg / m 2 is preferred. If the spraying amount is too small, the design property is not sufficient, and if it is too large, the finish layer slurry flows out without being fixed at the time of spraying, and the possibility of falling off increases.
本発明の不燃吹付け断熱材は、合成樹脂エマルションとロックウールとを別々に吹付けガンに送り、吹付けガンで両者を混合するとともに、この混合物中の固形分比率を４０〜９８質量％とし、吹付けガンから吐出させ、被吹付け物に吹付けることにより施工することができる。 The non-combustible spray heat insulating material of the present invention sends the synthetic resin emulsion and rock wool separately to the spray gun, mixes them with the spray gun, and sets the solid content ratio in this mixture to 40 to 98% by mass. It can be constructed by discharging from a spray gun and spraying on the object to be sprayed.
本発明においては、前記合成樹脂は、共重合体エマルションを使用するのが、施工時の火災の危険性防止、取り扱い性、他の構成材料との親和性、分散性の点で好ましい。前記合成樹脂はエマルションの形態で市販されており、入手も容易である。 In the present invention, it is preferable to use a copolymer emulsion as the synthetic resin in terms of prevention of fire risk during construction, handling, compatibility with other constituent materials, and dispersibility. The synthetic resin is commercially available in the form of an emulsion and is easily available.
本発明の施工方法においては、合成樹脂エマルションとロックウールとを別々に吹付けガンに送り、吹付けガンで両者を混合して吹付けを行う。このようにすることにより、両者が均一に混合されるとともに、均一に噴射することができる。この混合物中の固形分比率は、４０〜９８質量％とするのが好ましく、さらに４８〜９４質量％とするのがより好ましい。固形分比率が９８質量％を超えると、結合に必要な合成樹脂をロックウールに十分搦めることができなくなり、断熱材の保形性及び弾力性が低下する。一方、固形分比率が４０質量％未満では、吹付け後の断熱材の含水が高くなり乾燥性が低下し、吹付け初期の十分な付着力が得られにくくなる。
なお、吹付け断熱材の施工時における固形分比率は次式より求めた。
In the construction method of the present invention, the synthetic resin emulsion and the rock wool are separately sent to the spray gun, and both are mixed and sprayed with the spray gun. By doing in this way, while both can be mixed uniformly, it can inject uniformly. The solid content ratio in the mixture is preferably 40 to 98% by mass, and more preferably 48 to 94% by mass. When the solid content ratio exceeds 98% by mass, the synthetic resin necessary for bonding cannot be sufficiently given to rock wool, and the shape retention and elasticity of the heat insulating material are lowered. On the other hand, if the solid content ratio is less than 40% by mass, the moisture content of the heat insulating material after spraying becomes high, the drying property is lowered, and it becomes difficult to obtain a sufficient adhesive force at the initial stage of spraying.
In addition, the solid content ratio at the time of construction of a spraying heat insulating material was calculated | required from following Formula.
吹付けガンのエマルション噴霧ノズルチップは、小流量に合わせた、微細ミスト噴霧用を用いるのが好ましい。噴霧に際しては、吹付けガン内に圧縮空気を導入して、エマルションと混合して吹付けることもできる。圧縮空気を使うことにより、吹付けガンからの吐出圧が低い場合でも、エマルションを微細なミストとして吹付けることが可能である。 The emulsion spray nozzle tip of the spray gun is preferably used for fine mist spraying in accordance with a small flow rate. When spraying, compressed air can be introduced into the spray gun, mixed with the emulsion, and sprayed. By using compressed air, it is possible to spray the emulsion as fine mist even when the discharge pressure from the spray gun is low.
混合物を吹付けガンから吐出させ、被吹付け物に吹付けるが、その吹付け厚さは所定の断熱材の厚さよりも５ｍｍ〜１０ｍｍ厚く吹付けし、コテ押さえ等を用いて平滑化するとともに断熱材としての所定の厚さにするのが好ましい。厚めに吹付けて、木ゴテなどのコテ押さえにより平滑にすることで、意匠性が向上し、安定した品質とすることができる。 The mixture is discharged from the spray gun and sprayed onto the material to be sprayed, and the spray thickness is sprayed 5 mm to 10 mm thicker than the thickness of the predetermined heat insulating material, and smoothed using a trowel presser etc. It is preferable to have a predetermined thickness as a heat insulating material. By spraying thickly and smoothing with a trowel presser such as a wooden trowel, the design is improved and stable quality can be achieved.
本発明の断熱材を吹付ける対象部位は、壁、床、屋根、柱、はり等であり、被吹付け物としては、モルタル、コンクリート、ＡＬＣ、押出成形セメント板、鋼板（素地鋼板、メッキ鋼板、塗装鋼板）ステンレス鋼板、アルミニウム、繊維強化セメント板、発泡ウレタン等の可燃性断熱材等が挙げられる。 The target parts to which the heat insulating material of the present invention is sprayed are walls, floors, roofs, columns, beams, and the like, and mortar, concrete, ALC, extruded cement boards, steel sheets (base steel sheets, plated steel sheets) , Painted steel plate) Stainless steel plate, aluminum, fiber reinforced cement plate, flammable heat insulating material such as urethane foam, and the like.
本発明の表面仕上げ層を有する断熱材は、前記の表面仕上げ層用材料を混合して固形分比率を１０〜３５質量％に調整し、調整した材料を吹付けガンに送り、吹付け量が１．２ｋｇ／ｍ2以下となるように、前記の施工法で形成された不燃吹付け断熱材の表面に吹付けることにより施工することができる。 The heat insulating material having the surface finish layer of the present invention is prepared by mixing the material for the surface finish layer and adjusting the solid content ratio to 10 to 35% by mass, and sending the adjusted material to the spray gun. It can construct by spraying on the surface of the non-combustible spray heat insulating material formed by the said construction method so that it may become 1.2 kg / m < 2 > or less.
表面仕上げ層に用いる合成樹脂も、前記の断熱材層と同様にエマルションを用いるのが好ましい。 As for the synthetic resin used for the surface finishing layer, it is preferable to use an emulsion as in the case of the heat insulating material layer.
表面仕上げ層用材料は固形分比率を１０〜３５質量％、特に１５〜３０質量％に調整するのが好ましい。固形分比率が１０質量％未満では、吹付け後の表面仕上げ層の含水が高くなり乾燥性が低下するため、吹付け初期の十分な付着力が得られ難くなり、脱落の可能性が高くなる。一方、固形分比率が３５質量％を超えると、表面仕上げ層スラリーの流動性が低下し圧送し難くなくなるため施工性が低下する。また、断熱材との密着性が低下する。
なお、表面仕上げ層の施工時における固形分比率は次式より求めた。
The material for the surface finishing layer is preferably adjusted to a solid content ratio of 10 to 35% by mass, particularly 15 to 30% by mass. When the solid content ratio is less than 10% by mass, the moisture content of the surface finish layer after spraying becomes high and the drying property is lowered, so that it becomes difficult to obtain sufficient adhesion at the initial stage of spraying, and the possibility of falling off increases. . On the other hand, when the solid content ratio exceeds 35% by mass, the fluidity of the surface finishing layer slurry is lowered and difficult to be pumped, so that the workability is lowered. Moreover, adhesiveness with a heat insulating material falls.
In addition, the solid content ratio at the time of construction of a surface finish layer was calculated | required from following Formula.
表面仕上げ層用吹付けガンは、無機質軽量骨材として、０．５ｍｍ程度の粉末も用いるため、少々粒子の粗いものも詰まらせず、ムラなく吹付けられるよう、スラリーと圧縮空気を手元で混合して吹付けるようにするのが好ましい。圧縮空気を用いることで、詰まりがなく、ムラなく均質に吹付けることができる。 The spray gun for the surface finish layer uses a powder of about 0.5 mm as an inorganic lightweight aggregate, so the slurry and compressed air are mixed by hand so that even coarse particles are not clogged and sprayed evenly. It is preferable to spray. By using compressed air, there is no clogging and uniform spraying is possible.
次に実施例を挙げて本発明をさらに詳細に説明するが、本発明は何らこれに限定されるものではない。 EXAMPLES Next, although an Example is given and this invention is demonstrated further in detail, this invention is not limited to this at all.
実施例１〜７及び比較例１〜５
表１に記載の原料を用い、断熱材層を形成した。すなわち、合成樹脂エマルションとロックウールとを別々に吹付けガンに送り、吹付けガンで両者を混合し、混合物中の固形分比率を６７．９〜９６．４質量％とし、吹付けガンから吐出させ、繊維強化セメント板に吹付けることにより、断熱材層を形成した。得られた断熱材層の熱伝導率、不燃性（総発熱量）を測定した。施工状態も観察した。結果を表１に示す。表１中の原料比率は、断熱材中における各固形分の質量比率を意味する。
Examples 1-7 and Comparative Examples 1-5
A heat insulating material layer was formed using the raw materials shown in Table 1. That is, synthetic resin emulsion and rock wool are separately sent to a spray gun, and both are mixed with the spray gun, the solid content ratio in the mixture is 67.9 to 96.4% by mass, and discharged from the spray gun. Then, a heat insulating material layer was formed by spraying on a fiber reinforced cement board. The heat conductivity and nonflammability (total calorific value) of the obtained heat insulating material layer were measured. The construction state was also observed. The results are shown in Table 1. The raw material ratio in Table 1 means the mass ratio of each solid content in the heat insulating material.
（合成樹脂エマルション）
ＡＳ：アクリロニトリル・スチレン共重合体エマルション
ニカゾールRX-3002L（日本カーバイト工業社製、商品名）
ＥＮＡ・ＶＣ：エチレン・塩化ビニル・酢酸ビニル共重合体エマルション
スミエリート1320（住化ケムテックス社製、商品名）
α：酢酸ビニル・アクリル酸アルキルエステル共重合体エマルション
太平洋スプレーボンド（太平洋マテリアル社製、商品名）
ＥＶＡ：スチレン・酢酸ビニル共重合体エマルション
リカボンドS-400（中央理化工業社製、商品名）
(Synthetic resin emulsion)
AS: Acrylonitrile / styrene copolymer emulsion
Nicazole RX-3002L (Nippon Carbite Industries, product name)
ENA / VC: Ethylene / vinyl chloride / vinyl acetate copolymer emulsion
Sumilite 1320 (manufactured by Sumika Chemtex, trade name)
α: Vinyl acetate / alkyl acrylate copolymer emulsion
Taiheiyo Spray Bond (trade name, manufactured by Taiheiyo Material Co., Ltd.)
EVA: Styrene / vinyl acetate copolymer emulsion
Rikabond S-400 (product name, Chuo Rika Kogyo Co., Ltd.)
（ロックウール）
太平洋ミネラルファイバー粒状綿(太平洋マテリアル社製、商品名）国土交通大臣認定 ＮＭ−８６００繊維の平均太さが４〜６μｍのものを用いた。また、用いたロックウール（粒状綿）は、密度１０８ｋｇ/ｍ3且つ熱伝導率０．０４４Ｗ/ｍ・Ｋのものを用いた。
(Rock wool)
Taiheiyo Mineral Fiber Granular Cotton (trade name, manufactured by Taiheiyo Material Co., Ltd.) certified by the Minister of Land, Infrastructure, Transport and Tourism NM-8600 fiber with an average thickness of 4-6 μm was used. The rock wool (granular cotton) used had a density of 108 kg / m 3 and a thermal conductivity of 0.044 W / m · K.
（セメント）
白色ポルトランドセメント：ホワイトセメント（太平洋セメント社製、商品名）
(cement)
White Portland cement: White cement (trade name, manufactured by Taiheiyo Cement)
（無機質軽量骨材）
パーライト：目開き４５μｍ篩通過９５％以上、単位容積質量が０．２ｋｇ／Ｌ〜０．３５ｋｇ／Ｌ、（太平洋パーライト社製）
(Inorganic lightweight aggregate)
Perlite: Opening of 45 μm openings 95% or more, unit volume mass is 0.2 kg / L to 0.35 kg / L, (manufactured by Taiheiyo Pearlite)
（見かけ密度の測定法）
ＪＩＳ Ａ １４７６ 建築材料の含水率測定方法 ８．４項に規定される乾燥密度の測定法
(Apparent density measurement method)
JIS A 1476 Measuring method of moisture content of building materials Measuring method of dry density specified in 8.4
（熱伝導率の測定法）
ＪＩＳ Ａ １４１２−２ 熱絶縁材の熱抵抗及び熱伝導率の測定方法−第２部：熱流計法（ＨＦＭ法）
(Measurement method of thermal conductivity)
JIS A 1412-2 Measuring method of thermal resistance and thermal conductivity of thermal insulation material-Part 2: Heat flow meter method (HFM method)
（弾力性の判定方法）
試験方法は０．０５ｋｇの鉄鋼製の球形錘を断熱層表面から０．３ｍ離れた高さから自然落下させ、断熱材表面のへこみ具合を目視により判定評価した。
弾力性：○（断熱層表面が凹まない、若しくは、凹むが元に戻る）、×（断熱層表面が凹んだまま元に戻らない）
(How to determine elasticity)
In the test method, a 0.05 kg spherical weight made of steel was naturally dropped from a height of 0.3 m away from the surface of the heat insulating layer, and the degree of dent on the surface of the heat insulating material was visually evaluated and evaluated.
Elasticity: ○ (the surface of the heat insulation layer does not dent, or dents but returns to the original), × (the surface of the heat insulation layer remains dent and does not return)
（総発熱量の測定法）
ＪＩＳ Ａ ５４３０ 付属書ＪＡの発熱性試験、総発熱量８．０ＭＪ／ｍ2以下を不燃性と判定した。
(Measurement method of total calorific value)
The exothermic test of JIS A 5430 Annex JA, the total calorific value of 8.0 MJ / m 2 or less was determined to be nonflammable.
（施工状況）
吹付け施工性及び施工後の形状を目視にて評価した。
施工状況：○（問題なく施工出来る）、×（施工不良・出来ない）
(Construction status)
The sprayability and the shape after construction were evaluated visually.
Construction status: ○ (Can be constructed without any problems), × (Unsuccessful construction, cannot be done)
表１より、本発明の構成（ａ）、（ｂ）及び（ｃ）を採用することにより、優れた断熱性と不燃性を両立できることがわかる。 From Table 1, it can be seen that by adopting the configurations (a), (b) and (c) of the present invention, both excellent heat insulation and nonflammability can be achieved.
実施例８〜１２及び比較例６〜１０
表２に記載の原料を用い、断熱材層を実施例１〜７と同様にして形成し、その表面に、表面仕上げ層を形成した。得られた断熱材層及び表面仕上げ層の評価結果を表２に示す。表２中の断熱材（基材層）欄における原料比率は、断熱材中における各固形分の質量比率を意味し、表２中の表面仕上げ層欄における原料比率は、表面仕上げ層中における各固形分の質量比率を意味する。
Examples 8-12 and Comparative Examples 6-10
Using the raw materials shown in Table 2, a heat insulating material layer was formed in the same manner as in Examples 1 to 7, and a surface finish layer was formed on the surface. Table 2 shows the evaluation results of the obtained heat insulating material layer and the surface finish layer. The raw material ratio in the heat insulating material (base material layer) column in Table 2 means the mass ratio of each solid content in the heat insulating material, and the raw material ratio in the surface finishing layer column in Table 2 is each in the surface finishing layer. It means mass ratio of solid content.
表２より、本発明の構成（Ａ）、（Ｂ）及び（Ｃ）を採用することにより、優れた断熱性と不燃性を有する表面仕上げされた断熱材が得られることがわかる。 From Table 2, it can be seen that by adopting the constitutions (A), (B) and (C) of the present invention, a heat-treated heat-treated material having excellent heat insulation and nonflammability can be obtained.
実施例１３〜１８及び比較例１１〜１４
表１中の実施例１〜７及び表２中の実施例８〜１２の断熱材及び表面仕上げ層材料を用いて、固形分比率を変更する以外は、前記実施例と同様にして施工した。その施工状況の評価結果を表３に示す。
Examples 13-18 and Comparative Examples 11-14
Using the heat insulating materials and surface finish layer materials of Examples 1 to 7 in Table 1 and Examples 8 to 12 in Table 2, construction was performed in the same manner as in the above Examples, except that the solid content ratio was changed. The evaluation results of the construction status are shown in Table 3.
表３より断熱材及び表面仕上げ層材料の固形分比率を調整することにより、良好な施工性が得られることがわかる。 It can be seen from Table 3 that good workability can be obtained by adjusting the solid content ratio of the heat insulating material and the surface finish layer material.
Claims (6)
（ａ）当該合成樹脂が、エチレン、ブタジエン、塩化ビニル、スチレン、酢酸ビニル、炭素数４以上の長鎖脂肪酸ビニルエステル、シロキサン、アクリロニトリル、アクリル酸アルキルエステル及びメタクリル酸アルキルエステル並びにこれらの誘導体から選ばれる２種以上の共重合体であり、
（ｂ）当該合成樹脂の含有量が、断熱材中固形分換算で１．５〜８質量％であり、
（ｃ）断熱材の見かけ密度が０．１２〜０．３０ｇ／ｃｍ3である
不燃吹付け断熱材。 Synthetic resin emulsion and rock wool are separately sent to the spray gun, mixed with the spray gun, discharged from the spray gun and sprayed onto the sprayed object. A non-combustible spray insulation material,
(A) The synthetic resin is selected from ethylene, butadiene, vinyl chloride, styrene, vinyl acetate, long chain fatty acid vinyl ester having 4 or more carbon atoms, siloxane, acrylonitrile, alkyl acrylate ester, alkyl methacrylate ester and derivatives thereof. Two or more kinds of copolymers,
(B) The content of the synthetic resin is 1.5 to 8% by mass in terms of solid content in the heat insulating material,
(C) The non-combustible spraying heat insulating material whose apparent density of a heat insulating material is 0.12-0.30 g / cm < 3 >.
（Ａ）表面仕上げ層の原料比率が、セメント１５．０〜７０質量％、無機質軽量骨材２９〜８０．０質量％、及び合成樹脂を固形分換算で１〜７質量％であり、
（Ｂ）当該合成樹脂が、エチレン、ブタジエン、塩化ビニル、スチレン、酢酸ビニル、炭素数４以上の長鎖脂肪酸ビニルエステル、シロキサン、アクリロニトリル、アクリル酸アルキルエステル及びメタクリル酸アルキルエステル並びにこれらの誘導体から選ばれる２種以上の共重合体であり、
（Ｃ）表面仕上げ層の吹付け量が１．２ｋｇ／ｍ2以下。 A non-combustible spraying heat insulating material comprising the non-combustible spraying heat insulating material according to claim 1 or 2 as a base material layer, and a surface finishing layer having the following (A) to (C) formed on the surface thereof: .
(A) The raw material ratio of the surface finish layer is 15.0 to 70% by mass of cement, 29 to 80.0% by mass of inorganic lightweight aggregate, and 1 to 7% by mass in terms of solid content,
(B) The synthetic resin is selected from ethylene, butadiene, vinyl chloride, styrene, vinyl acetate, long chain fatty acid vinyl ester having 4 or more carbon atoms, siloxane, acrylonitrile, alkyl acrylate ester, alkyl methacrylate ester and derivatives thereof. Two or more kinds of copolymers,
(C) The spray amount of the surface finish layer is 1.2 kg / m 2 or less.
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