JPH02234972A - Sound absorbing material with thermal insulation - Google Patents
Sound absorbing material with thermal insulationInfo
- Publication number
- JPH02234972A JPH02234972A JP1053008A JP5300889A JPH02234972A JP H02234972 A JPH02234972 A JP H02234972A JP 1053008 A JP1053008 A JP 1053008A JP 5300889 A JP5300889 A JP 5300889A JP H02234972 A JPH02234972 A JP H02234972A
- Authority
- JP
- Japan
- Prior art keywords
- inorganic
- absorbing material
- heat
- organic binder
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011358 absorbing material Substances 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 title 1
- 239000011230 binding agent Substances 0.000 claims abstract description 26
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 20
- 239000003365 glass fiber Substances 0.000 claims abstract description 9
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000005011 phenolic resin Substances 0.000 claims abstract description 6
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 6
- VCNTUJWBXWAWEJ-UHFFFAOYSA-J aluminum;sodium;dicarbonate Chemical compound [Na+].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O VCNTUJWBXWAWEJ-UHFFFAOYSA-J 0.000 claims abstract description 4
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 4
- 239000000440 bentonite Substances 0.000 claims abstract description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910021538 borax Inorganic materials 0.000 claims abstract description 4
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910001647 dawsonite Inorganic materials 0.000 claims abstract description 4
- 229910052622 kaolinite Inorganic materials 0.000 claims abstract description 4
- 239000004328 sodium tetraborate Substances 0.000 claims abstract description 4
- 235000010339 sodium tetraborate Nutrition 0.000 claims abstract description 4
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims abstract description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000010954 inorganic particle Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 5
- 229910019440 Mg(OH) Inorganic materials 0.000 claims 1
- 239000000835 fiber Substances 0.000 abstract description 5
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 abstract description 3
- 239000000347 magnesium hydroxide Substances 0.000 abstract description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 abstract description 3
- 235000012254 magnesium hydroxide Nutrition 0.000 abstract description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 abstract description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 abstract description 2
- 229910001679 gibbsite Inorganic materials 0.000 abstract description 2
- 239000011521 glass Substances 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract 2
- 239000002341 toxic gas Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000009931 harmful effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 229910018626 Al(OH) Inorganic materials 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- CYPPCCJJKNISFK-UHFFFAOYSA-J kaolinite Chemical compound [OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[O-][Si](=O)O[Si]([O-])=O CYPPCCJJKNISFK-UHFFFAOYSA-J 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000772415 Neovison vison Species 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
- Building Environments (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、ガラス繊維板のような断熱吸音材に関する．
［従来の技術コ
ガラス短繊維、ロックウールのような無機繊維にフェノ
ール系樹脂のような未硬化の有機ハインダを附与し、所
定密度となるよう挾圧しつつ加熱し、有機バインダを硬
化せしめて多数の無機繊維を結合せしめた無機質部材は
断熱吸音性に優れ、軽量である長所を有し、断熱吸音材
として、天井板，壁材のような内装材、プレハブタクト
用原板、断熱バイブ等として広く使用されている。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat-insulating and sound-absorbing material such as a glass fiber board. [Conventional technology] An uncured organic binder such as a phenolic resin is applied to inorganic fibers such as short glass fibers or rock wool, and the organic binder is cured by heating while compressing the fibers to a predetermined density. Inorganic materials combined with inorganic fibers have excellent heat-insulating and sound-absorbing properties and are lightweight, and are widely used as heat-insulating and sound-absorbing materials, interior materials such as ceiling panels and wall materials, base plates for prefabricated tact, heat-insulating vibrators, etc. It is used.
［発明が解決しようとする課題］
前述した断熱吸音材を構成する無機ｒａｍ自体は不燃で
あるが、該繊維同志を結合するために有機質ハインダを
使用しているため、高温に曝されると、有機質バインダ
が酸化されて発熱し，着火し易くなる。[Problems to be Solved by the Invention] The inorganic RAM that constitutes the heat-insulating and sound-absorbing material described above is itself nonflammable, but since an organic binder is used to bind the fibers together, when exposed to high temperatures, The organic binder is oxidized and generates heat, making it easier to catch fire.
高密度の断熱吸音材にあっては、高密度に圧縮された無
機繊維の弾性反発力により剥離か生ずるのを防止するた
め、多量の有機質バインダを使用し，無機繊維同志を強
固に結合する必要が生ずるため、上記傾向は一層顕著と
なる。For high-density heat-insulating and sound-absorbing materials, it is necessary to use a large amount of organic binder to firmly bind the inorganic fibers together to prevent them from peeling off due to the elastic repulsive force of the highly compressed inorganic fibers. occurs, so the above-mentioned tendency becomes even more remarkable.
有４！！難燃剤を用いることも提案されているか、高湿
雰囲気で使用すると有害ガスを発生し易い。Yes 4! ! The use of flame retardants has also been proposed, but harmful gases are likely to be generated when used in a high humidity atmosphere.
本発明は、従来の断熱吸音材の上述した問題点を解決し
、高密度品を高温に曝した場合でも着火を生ずることか
なく、有害ガスを発生することもないような断熱吸音剤
を提供することを目的としている。The present invention solves the above-mentioned problems of conventional heat-insulating sound-absorbing materials, and provides a heat-insulating sound-absorbing material that does not cause ignition or generate harmful gases even when a high-density product is exposed to high temperatures. It is intended to.
［課題を解決するための手段コ
上記目的を達成するために、本発明においては、多数の
無ａ繊維を有機質ハインダて結合した断熱吸音材として
、無機繊維に平均粒径５０．以下の吸熱性無機物粒子を
附着させた断熱吸音材を使用する。[Means for Solving the Problems] In order to achieve the above objects, the present invention provides a heat insulating and sound absorbing material in which a large number of aluminous fibers are combined with an organic binder, and inorganic fibers have an average particle size of 50. Use a heat-insulating and sound-absorbing material to which the following heat-absorbing inorganic particles are attached.
又、無機緻維としては、ガラス短繊維を使用する。Furthermore, short glass fibers are used as the inorganic fibers.
又、有機質バインダとしては、フェノール系樹脂を使用
する。Furthermore, a phenolic resin is used as the organic binder.
又、吸熱性無機物としては、Ａｌ（ＯＨ）ｆｆ、Ｍｇ（
ＯＨ）２ホウ砂、ホウ酸亜鉛、アルミン酸カルシューム
、ドーソナイト、ベントナイト又はカオリナイトを使用
する。In addition, as endothermic inorganic substances, Al(OH)ff, Mg(
OH)2 Using borax, zinc borate, calcium aluminate, dawsonite, bentonite or kaolinite.
次に、本発明を更に具体的に説明する。Next, the present invention will be explained in more detail.
遠心法、火焔法等によって製造されたガラス短ａｍ、ロ
ックウールのような無機質ｆａ雄を常法に従い、有孔コ
ンベア上に堆積、集綿してマット状物とする。無機繊維
としては特にガラス短繊維が好ましい。Inorganic materials such as glass fibers and rock wool produced by centrifugal method, flame method, etc. are deposited on a perforated conveyor and collected to form a mat-like material according to a conventional method. As the inorganic fibers, short glass fibers are particularly preferred.
この際、有機質ハインダを無機繊維に附与する。At this time, an organic binder is added to the inorganic fiber.
有機質ハインダとしては、フェノール系樹脂を用い、こ
の樹脂を固型分として５〜４０ｗｔ％程度含むエマルジ
ョンを無機繊維に噴霧することによってバインダを附与
するのか適当てある。As the organic binder, a phenolic resin may be used, and the binder may be applied by spraying an emulsion containing about 5 to 40 wt % of this resin as a solid content onto the inorganic fibers.
そして、無機繊維に平均粒径５ｏＩＬ以下、好ましくは
１０ル以下の吸熱性無４！！物粒子を附着させる。And, the inorganic fiber has an average particle size of 5 oIL or less, preferably 10 l or less, and has no endothermic properties. ! Attach particles.
上記無機物粒子は水に分散、懸濁させた状態、或は気体
中に浮遊させた状態で無機繊維に吹付けることによって
附着させるのか適出である。なお、この無機物粒子の吹
付けは有機賀バインタの吹付けと同時或は有機質バイン
ダの吹付け後に行うのが適当である。The above-mentioned inorganic particles may be applied to the inorganic fibers by spraying them in a state in which they are dispersed or suspended in water, or in a state in which they are suspended in a gas. It is appropriate that the inorganic particles be sprayed at the same time as the organic binder or after the organic binder is sprayed.
最も好ましい態様においては、フ才一ミンクフート内に
おいて吹付けを行う。In the most preferred embodiment, spraying is carried out within a single mink foot.
なお、吸熱性無ａ物粒子は、有機質バインダ中に添加、
懸濁させることもできる。Note that the endothermic inorganic particles are added to the organic binder,
It can also be suspended.
吸熱性無機物としては、有機賀バインダの加熱硬化条件
（通常２００〜２８０゜Ｃ， ２ｍｉｎ程度）では実質
的に分解せず、且っ７５０゜Ｃ以下において速やかに分
解吸熱し、吸熱量か太き＜ （１００ｃａｌ／ｇｒ以上
）しかも、有機質ハインダ、無機繊維に有害な作用を及
ぼさないものを使用するのが適当である。As an endothermic inorganic substance, it does not substantially decompose under the heat curing conditions of organic binders (usually 200 to 280°C, about 2 minutes), but quickly decomposes and absorbs heat at temperatures below 750°C, and has a large endothermic amount. < (100 cal/gr or more) Moreover, it is appropriate to use an organic binder that does not have a harmful effect on the inorganic fibers.
このような吸熱性無機物としては、金属の水酸化物、粘
土鉱物が例示されるが、特にＡｌ（ＯＨ）．、Ｍｇ（Ｏ
Ｈ）ｚ ．ホウ砂、ホウ酸亜鉛、アルミン酸カルシュー
ム、ドーソナイト、ベントナイト、カオリナイト就中Ａ
ｌ（ＯＨ）３． Ｍｇ（ＯＨ）２か適当である。Examples of such endothermic inorganic substances include metal hydroxides and clay minerals, especially Al(OH). , Mg(O
H)z. Borax, zinc borate, calcium aluminate, dawsonite, bentonite, kaolinite, especially A
l(OH)3. Mg(OH)2 is suitable.
ＮａＯＨ． Ｃａ（ＯＨ）２はガラスａｍ等と反応して
劣化を生じ易＜ 、Ｃａ（ＯＨ）ｚは空中のＣＯ２と反
応して分解温度の高いＣａＣＯ．を生成するため適当て
はない。NaOH. Ca(OH)2 easily reacts with glass am, etc. and causes deterioration, and Ca(OH)z reacts with CO2 in the air, resulting in CaCO. It is not suitable for generating .
吸熱性無機物粒子としては平均粒径５０ル以下、好まし
くは１０．以下、更に好ましくは５ル以下のものを使用
する。The average particle size of the endothermic inorganic particles is 50 µm or less, preferably 10 µm. Hereinafter, it is more preferable to use 5 liters or less.
粒径があまり大きいものを使用すると充分な効果をうろ
ことかできず、又粒径の小さいもの程大きい効果か得ら
れることが判明した。It has been found that if the particle size is too large, a sufficient effect cannot be obtained, and that the smaller the particle size, the greater the effect.
吸．鵡性無機物粒子の附着量は，当該無機物の種類、有
機質バインタの附与量、断熱吸音材の使用条件等に応じ
て定められるが、無機繊維の２〜３０ｗｔ％，好ましく
は５〜１５ｗＬ％とするのか適当である。Suction. The adhesion amount of the corpuscular inorganic particles is determined depending on the type of the inorganic substance, the amount of organic binder applied, the usage conditions of the heat-insulating and sound-absorbing material, etc., but it is 2 to 30 wt%, preferably 5 to 15 wL% of the inorganic fiber. Is it appropriate to do so?
この量があまり少ないと、充分な効果が得難くなり、又
この量をあまり大としても効果の増大はさ程望めず，経
済的でないばかりか，断熱吸音材の軽量性等が若干損な
われることもある。If this amount is too small, it will be difficult to obtain a sufficient effect, and even if this amount is too large, the effect will not increase much, and not only will it be uneconomical, but the light weight of the heat-insulating and sound-absorbing material will be slightly impaired. There is also.
Ａｌ（ＯＨ）：Ｉ ． Ｍｇ（ＯＨ）２は，多量に使用
してもこのような断熱吸音材の性能低下を生ずることか
ない
前述した有機質バインダ及び吸熱性無機物粒子を附着さ
せた無機質ｆａａを、常法にしつかって集綿，所定密度
となるように挾圧しつつ加熱し、有機質バインダを硬化
させることにより、本発明断熱吸音材をうろことができ
る。Al(OH):I. Mg(OH)2 does not cause any deterioration in the performance of the heat-insulating and sound-absorbing material even when used in large amounts.The inorganic faa to which the above-mentioned organic binder and heat-absorbing inorganic particles are attached is used in a conventional manner to collect cotton. The heat-insulating and sound-absorbing material of the present invention can be molded by heating it while being compressed to a predetermined density to harden the organic binder.
本発明の断熱吸音材は、そのまま或は必要に応じて表被
材を被着して建家の断熱吸音材、天井板、壁材のような
内装材、車輌用内装材、エンジンカハーとして使用し、
或は又所定の大きさに粉砕し吹込工法の原料として使用
することも可能である．
又プレハブタクトの原板として使用することもできる。The heat-insulating and sound-absorbing material of the present invention can be used as a heat-insulating and sound-absorbing material for buildings, interior materials such as ceiling panels and wall materials, interior materials for vehicles, and engine covers, either as it is or by covering it with a surface material if necessary. use,
Alternatively, it can be crushed to a specified size and used as a raw material for the blowing method. It can also be used as a base plate for prefabricated tact.
板状体として使用する場合の密度は２０〜１２０ｋｇ／
ｒｒｆ、好ましくは４ ０ 〜Ｉ（］Ｑｋｇ／ｒｎ’、
有機賀バインダの附与量は固型分として４〜１５ｗｔ％
、好ましくは６〜１２ｗｔ％とするのか適当である。When used as a plate, the density is 20 to 120 kg/
rrf, preferably 40 to I(]Qkg/rn',
The amount of organic binder added is 4 to 15 wt% as solid content.
, preferably 6 to 12 wt%.
［作 用］
多数の無機Ｕ＆雄を有機賀バインダで結合した断熱吸音
材において、無機繊維に吸熱性無機物粒子を附着させる
ことにより、断熱吸音材を高湿雰囲気で使用した場合、
有機質ハインタの酸化に起因する発熱を、上記ｓｍ物粒
子の吸熱により吸収し、発熱量を低下させる。[Function] When the heat-insulating sound-absorbing material is made by bonding a large number of inorganic U and males with an organic binder, by attaching endothermic inorganic particles to the inorganic fibers, when the heat-insulating sound-absorbing material is used in a high-humidity atmosphere,
The heat generated by the oxidation of the organic hindrance is absorbed by the SM particles, thereby reducing the amount of heat generated.
又吸熱性無機物粒子の粒径な５０ＪＬ以下とすることに
より、無機繊維表面の上記無機物粒子による被覆面積を
大ならしめ、有機質ハインダか局部的に加熱酸化され燃
焼した場合の当該バインダの延焼を防止する。In addition, by setting the particle size of the endothermic inorganic particles to 50 JL or less, the area covered by the inorganic particles on the surface of the inorganic fibers is increased, thereby preventing the spread of fire of the binder when the organic binder is locally heated and oxidized and burned. do.
［実施例］
遠心法で製造された平均直径７ＪＬのガラス繊維に、２
０ｗｔ％のフェノール系樹脂を含むハインタを噴霧して
固型分として１０ｗｔ％附与し、平均粒径３終以下のＡ
ｌ（ＯＨ）：１粒子を２０ｗｔ％含む懸濁液を噴霧し、
固型分として１０ｗｔ％、上記無機繊維に附着させた。[Example] Glass fibers with an average diameter of 7 JL manufactured by a centrifugal method were
Hinter containing 0 wt% of phenolic resin was sprayed to give 10 wt% as solid content, and A with an average particle size of 3 or less was added.
Spray a suspension containing 20 wt% of l(OH):1 particles,
A solid content of 10 wt % was attached to the inorganic fibers.
このガラス繊維を使用し、常法に従い、厚み２５ｍｍ、
密度６４ｋｇ／ｍｊの原板を製造し、この原板表面にＡ
ＬＧＣを貼着し、建設省試験に合格するプレハブダクト
を得ることかできた。Using this glass fiber, according to the usual method, the thickness is 25 mm,
A master plate with a density of 64 kg/mj is manufactured, and A is applied to the surface of this master plate.
By attaching LGC, we were able to obtain a prefabricated duct that passed the Ministry of Construction test.
なお，この原板の剥離強度は５ ０ ｇｒ／ｃｒｎ’で
あり、又有害ガスか発生することもなかった。The peel strength of this original plate was 50 gr/crn', and no harmful gas was generated.
［比較例コ
Ａｌ（ＯＨ）３を用いることなく、その他は実施例と同
一条件で製造した原板を使用したプレハブダクトは上記
試験に合格しなかった。なお、原板の剥離強度は５ ２
ｋｇ／ｃｍ’であった。[Comparative Example] A prefabricated duct using an original plate manufactured under the same conditions as the example without using Al(OH)3 did not pass the above test. The peel strength of the original plate is 5 2
kg/cm'.
［発明の効果］
剥離強度か大きく、不燃性か高く、且つ高温で使用して
も有害ガスの発生することかない。[Effects of the invention] It has high peel strength, high nonflammability, and does not generate harmful gases even when used at high temperatures.
Claims (4)
熱吸音材において、無機繊維に平均粒径５０μ以下の吸
熱性無機物粒子を附着させた断熱吸音材。(1) A heat-insulating sound-absorbing material made by bonding a large number of inorganic fibers with an organic binder, in which heat-absorbing inorganic particles with an average particle size of 50 μm or less are attached to the inorganic fibers.
断熱吸音材。(2) The heat-insulating and sound-absorbing material according to claim 1, wherein the inorganic fibers are short glass fibers.
項１又は２記載の断熱吸音材。(3) The heat-insulating sound-absorbing material according to claim 1 or 2, wherein the organic binder is a phenolic resin.
）＿２、ホウ砂、ホウ酸亜鉛、アルミン酸カルシューム
、ドーソナイト、ベントナイト又はカオリナイトである
請求項１，２又は３記載の断熱吸音材。(4) Endothermic inorganic substances include Al(OH)_3, Mg(OH)
)_2 The heat-insulating and sound-absorbing material according to claim 1, 2 or 3, which is borax, zinc borate, calcium aluminate, dawsonite, bentonite or kaolinite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1053008A JPH02234972A (en) | 1989-03-07 | 1989-03-07 | Sound absorbing material with thermal insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1053008A JPH02234972A (en) | 1989-03-07 | 1989-03-07 | Sound absorbing material with thermal insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02234972A true JPH02234972A (en) | 1990-09-18 |
Family
ID=12930887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1053008A Pending JPH02234972A (en) | 1989-03-07 | 1989-03-07 | Sound absorbing material with thermal insulation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02234972A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008062413A (en) * | 2006-09-05 | 2008-03-21 | Daiwa:Kk | Heat insulating material and its manufacturing method |
-
1989
- 1989-03-07 JP JP1053008A patent/JPH02234972A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008062413A (en) * | 2006-09-05 | 2008-03-21 | Daiwa:Kk | Heat insulating material and its manufacturing method |
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