JPH04232735A - Sound-absorbing material and preparation thereof - Google Patents
Sound-absorbing material and preparation thereofInfo
- Publication number
- JPH04232735A JPH04232735A JP2415402A JP41540290A JPH04232735A JP H04232735 A JPH04232735 A JP H04232735A JP 2415402 A JP2415402 A JP 2415402A JP 41540290 A JP41540290 A JP 41540290A JP H04232735 A JPH04232735 A JP H04232735A
- Authority
- JP
- Japan
- Prior art keywords
- absorbing material
- sound absorbing
- elastic coating
- block
- material according
- 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.)
- Granted
Links
- 239000011358 absorbing material Substances 0.000 title claims abstract description 35
- 229920002635 polyurethane Polymers 0.000 claims abstract description 27
- 239000004814 polyurethane Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims description 40
- 238000000576 coating method Methods 0.000 claims description 40
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 18
- 239000011496 polyurethane foam Substances 0.000 claims description 18
- 239000012790 adhesive layer Substances 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- -1 poly(urethane-urea) Polymers 0.000 claims description 5
- 229920002396 Polyurea Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 2
- 229920003052 natural elastomer Polymers 0.000 abstract description 2
- 229920001194 natural rubber Polymers 0.000 abstract description 2
- 229920003051 synthetic elastomer Polymers 0.000 abstract description 2
- 239000005061 synthetic rubber Substances 0.000 abstract description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 abstract description 2
- 239000004840 adhesive resin Substances 0.000 abstract 1
- 229920006223 adhesive resin Polymers 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 239000003973 paint Substances 0.000 description 9
- 238000009423 ventilation Methods 0.000 description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- 239000013013 elastic material Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 210000003491 skin Anatomy 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 210000002615 epidermis Anatomy 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 229920003226 polyurethane urea Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 229920006264 polyurethane film Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は吸音材に関し、更に詳し
くは装置或は外界の騒音が各種通風路等を経由して室内
等に侵入するのを防止するのに適した吸音材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing material, and more particularly to a sound absorbing material suitable for preventing noise from equipment or the outside world from entering a room through various ventilation channels.
【0002】0002
【従来の技術】従来、各種乗用車等においては室内の暖
房、冷房、換気等の目的で室内に開口部を有し、外界或
は各種装置に連結した各種の通風路又は管が形成されて
いる。これらの管を通じて各種装置或は外界の騒音が室
内に侵入するという問題がある。乗用車の高級化が著し
く進んでいる近年では上記の騒音の問題が一層重要な問
題となっている。上記の騒音の問題を解決する方法とし
て、通気路内等に発泡ポリウレタンのブロックを充填す
る方法が一般的であるが、この様な発泡ポリウレタンは
非常に柔らかく且つ表面に孔が多数存在する為表面強度
が低く、ちぎれた断片が室内に侵入するという問題があ
る。又、かかるポリウレタンブロックを管内に充填する
と、自動車の走行時の振動によって位置ずれを発生し、
この位置ずれを抑制する為に、ブロックを接着剤等で固
定することが考えられるが、実際に管内においてこの様
な操作を実施することは作業性の点で許容出来ない。[Prior Art] Conventionally, various types of passenger cars have interior openings for the purpose of indoor heating, cooling, ventilation, etc., and various ventilation paths or pipes are formed that are connected to the outside world or various devices. . There is a problem in that noise from various devices or the outside world enters the room through these pipes. In recent years, as passenger cars have become significantly more luxurious, the above-mentioned noise problem has become an even more important problem. A common method to solve the above noise problem is to fill the air passages with blocks of foamed polyurethane, but such foamed polyurethane is very soft and has many pores on its surface, so There is a problem that the strength is low and broken pieces can enter the room. Furthermore, if such a polyurethane block is filled into a pipe, it may become misaligned due to vibrations when a car is running.
In order to suppress this positional shift, it is conceivable to fix the block with adhesive or the like, but it is not acceptable in terms of workability to actually carry out such an operation inside the pipe.
【0003】0003
【発明が解決しようとしている問題点】従って本発明の
目的は、装置或は外界の騒音が各種通風路等を経由して
室内等に侵入するのを防止するのに適し、更に狭い通風
路内等に設置が容易である吸音材を提供することである
。[Problems to be Solved by the Invention] Therefore, it is an object of the present invention to be suitable for preventing equipment or external noise from entering a room through various ventilation ducts, It is an object of the present invention to provide a sound absorbing material that is easy to install.
【0004】0004
【問題点を解決する為の手段】上記目的は以下の本発明
によって達成される。即ち、本発明は、ブロック状軟質
発泡ポリウレタンとその表面に設けられた通気性弾性被
膜からなることを特徴とする吸音材、離型性基材表面に
弾性被膜を形成し、該弾性被膜をブロック状軟質発泡ポ
リウレタンの表面に転写することを特徴とする吸音材の
製造方法及び上記の吸音材を圧縮縮小し、該縮小体を容
器内に収容してなることを特徴とする吸音材である。[Means for Solving the Problems] The above object is achieved by the following present invention. That is, the present invention provides a sound absorbing material characterized by comprising a block-shaped soft polyurethane foam and a breathable elastic coating provided on the surface thereof, an elastic coating is formed on the surface of a releasable base material, and the elastic coating is blocked. A method of manufacturing a sound absorbing material is characterized in that the sound absorbing material is transferred onto the surface of a soft foamed polyurethane, and a sound absorbing material is characterized in that the sound absorbing material is compressed and reduced and the reduced body is housed in a container.
【0005】[0005]
【作用】ブロック状軟質発泡ポリウレタンの表面に通気
性の弾性被膜を形成したものは、圧縮によって容易にそ
の体積を縮小する。勿論、通気性被膜を形成していない
裸のポリウレタン発泡体も同様に縮小する。上記本発明
による縮小体を放置すると、数十秒間〜数分間で元の体
積に復元する。これに対して裸のポリウレタン発泡体の
場合には瞬時に元の体積に復元する。本発明では、上記
復元に要する時間を、吸音材を狭い場所に設置する作業
時間に充当することが出来る。従って本発明によれば、
ポリウレタン発泡体の表面に柔軟な通気性弾性被膜を形
成することによって、ポリウレタン発泡体の強度を向上
させ、表面の脆さを解消することが出来る。又、上記通
気性の被膜の通気度を適当な範囲とすることによって、
縮小体から元の体積に復元する時間を調整し、縮小体の
状態で所定の狭い領域に容易に装入することが出来、そ
のまま放置するのみで、縮小体は体積を復元する。この
際完全復元体の径を装入するべき管の直径より数%〜数
十%大に設計しておくことによって、復元力による圧力
によって復元した発泡体は所定箇所にしっかりと固定さ
れ、走行時の振動等によっても位置ずれを生じない。[Operation] A block-shaped flexible polyurethane foam with a breathable elastic coating formed on its surface can easily reduce its volume by compression. Of course, bare polyurethane foam without a breathable coating will shrink as well. If the reduced body according to the present invention is left to stand, it will restore its original volume in several tens of seconds to several minutes. In contrast, bare polyurethane foam instantly restores its original volume. In the present invention, the time required for the restoration can be used for the work of installing the sound absorbing material in a narrow space. According to the invention, therefore:
By forming a flexible, breathable elastic coating on the surface of a polyurethane foam, the strength of the polyurethane foam can be improved and the brittleness of the surface can be eliminated. In addition, by adjusting the air permeability of the above-mentioned air-permeable film to an appropriate range,
By adjusting the time for the reduced body to restore its original volume, the reduced body can be easily loaded into a predetermined narrow area, and the reduced body will restore its volume by simply leaving it as is. At this time, by designing the diameter of the completely restored body to be several percent to several tens of percent larger than the diameter of the pipe into which it is to be charged, the foam that has been restored by the pressure of the restoring force will be firmly fixed in place, and the No displacement occurs due to vibrations, etc.
【0006】[0006]
【好ましい実施態様】次に好ましい実施態様を挙げて本
発明を更に詳しく説明する。本発明の吸音剤は、図1に
示す様に任意の形状のブロックであり、図2にそのA−
A断面を示す様にブロック状軟質発泡ポリウレタン1の
表面に通気性弾性被膜2を形成してなる。又、本発明の
別の吸音材は、図3に示す様に上記吸音材を圧縮縮小し
、該縮小体3を容器4内に収容してなる。本発明におい
て使用する発泡ポリウレタンは、従来クッション材、マ
ットレス、断熱材、防音材等に広く使用されている軟質
発泡ポリウレタンであって、本発明ではこれらの公知の
発泡ポリウレタンがいずれも使用出来る。[Preferred Embodiments] Next, the present invention will be explained in more detail by citing preferred embodiments. The sound absorbing material of the present invention is a block of any shape as shown in FIG. 1, and its A-
As shown in cross section A, a breathable elastic coating 2 is formed on the surface of a block-shaped flexible polyurethane foam 1. Another sound absorbing material of the present invention is obtained by compressing and reducing the above sound absorbing material and housing the reduced body 3 in a container 4, as shown in FIG. The foamed polyurethane used in the present invention is a flexible foamed polyurethane that has been widely used in cushioning materials, mattresses, heat insulation materials, soundproofing materials, etc. In the present invention, any of these known foamed polyurethanes can be used.
【0007】本発明では上記市場から容易に入手される
発泡ポリウレタンを所定の形状に裁断する。図1示の例
はa=b=15cm、c=20cm、d=12cmの三
角柱状に裁断したものであり、この表面に通気性の弾性
被膜2を形成する。弾性被膜は、天然、合成ゴム、熱可
塑性エラストマー、熱硬化性エラストマー等、被膜化が
可能ないずれの弾性体から形成してもよいが、被膜の種
々の物性の点からはポリウレタン、ポリウレア或はポリ
(ウレタン−ウレア)の熱可塑性又は熱硬化性エラスト
マーが好ましい。又、上記で形成する弾性被膜の100
%モジュラスは10〜200Kg/cm2の範囲が好ま
しく、この値が高過ぎると柔らかさが不十分で吸音性、
作業性、感触等が不満足であり、一方、低過ぎると被膜
の強度が不満足で粘着性も出て好ましくない。In the present invention, foamed polyurethane, which is easily available on the market, is cut into a predetermined shape. The example shown in FIG. 1 is cut into a triangular prism shape with a = b = 15 cm, c = 20 cm, and d = 12 cm, and a breathable elastic coating 2 is formed on the surface of the triangular prism. The elastic coating may be formed from any elastic material that can be formed into a coating, such as natural rubber, synthetic rubber, thermoplastic elastomer, thermosetting elastomer, etc. However, from the viewpoint of various physical properties of the coating, polyurethane, polyurea, or Poly(urethane-urea) thermoplastic or thermosetting elastomers are preferred. In addition, the elastic coating formed above has a
% modulus is preferably in the range of 10 to 200 Kg/cm2; if this value is too high, the softness will be insufficient and the sound absorption will deteriorate.
Workability, feel, etc. are unsatisfactory, and on the other hand, if it is too low, the strength of the film is unsatisfactory and it becomes sticky, which is undesirable.
【0008】上記弾性材料からブロック状軟質発泡ポリ
ウレタン表面に弾性被膜を形成する好ましい方法として
は、例えば、
(イ)弾性材料から別途適当な被膜を形成しておき、こ
の被膜をブロック表面に貼り合せ、必要に応じて貼り合
せの前後に被膜に通気孔を設ける方法、及び(ロ)弾性
材料の溶液又はエマルジョンを上記ブロックの表面に塗
布又は噴霧して被膜を形成し、後に必要に応じて針等に
よって通気孔を設ける方法が挙げられる。上記(イ)の
方法は、ブロック状軟質発泡ポリウレタンが図1の如く
平面からなる多角形の形状の場合に有用であり、一方、
上記(ロ)の方法はブロック状軟質発泡ポリウレタンが
球体やドーナッツ形状等の如く曲面形状を有している場
合に有用である。A preferred method for forming an elastic coating on the surface of a block-shaped flexible polyurethane foam from the above-mentioned elastic material includes, for example, (a) forming a separate appropriate coating from the elastic material and bonding this coating to the block surface; (b) forming a film by coating or spraying a solution or emulsion of an elastic material on the surface of the block, and later applying needles as needed; An example of this method is to provide ventilation holes. The method (a) above is useful when the block-shaped flexible polyurethane foam has a polygonal shape consisting of planes as shown in FIG.
The above method (b) is useful when the block-shaped flexible polyurethane foam has a curved shape such as a sphere or a donut shape.
【0009】上記(イ)の方法について更に詳しく説明
すると、弾性被膜の形成方法としては、図4に図解的に
示す様に離型性基材5の表面に弾性材料の有機溶剤溶液
又はエマルジョンを塗布して被膜(表皮)2を形成し、
更にその表面に接着剤層(又は粘着剤層)6を形成する
。離型性基材5としてはポリエステルフイルム、ポリプ
ロピレンフイルム、離型紙等であり、これらの離型性基
材はその表面が平滑であれば光沢のある弾性被膜が形成
され、一方、艶消被膜が望ましい場合にはマット化した
離型性基材を使用すればよい。表皮の厚さは5〜40μ
m程度が好ましい。接着剤層は、アクリル系、ポリエス
テル系、ポリ酢酸ビニル系、ポリウレタン系、ポリアミ
ド系等の公知のヒートシール型接着剤、アクリル系、エ
ポキシ系、ウレタン系等の1液又は2液型の接着剤、ア
クリル系、シリコン系等の粘着剤が任意に使用出来、作
業性、弾性被膜及び発泡ポリウレタンブロックとの接着
性、柔軟性等を考慮すると、ポリウレタン系のヒートシ
ール型接着剤が好ましい。これらの接着剤層の厚みは5
〜80μm程度であり、弾性被膜全体(表皮+接着剤層
)としては10〜120μm程度の厚みが好ましい。
この弾性被膜の厚みが10μm未満であると、被膜の強
度が不足し、一方、120μmを越える厚みであっては
経済的ではない。To explain the above method (a) in more detail, as a method for forming an elastic film, as schematically shown in FIG. Apply to form a film (epidermis) 2,
Furthermore, an adhesive layer (or adhesive layer) 6 is formed on the surface. The releasable base material 5 is polyester film, polypropylene film, release paper, etc. If the surface of these releasable base materials is smooth, a glossy elastic film will be formed, but on the other hand, a matte film will be formed. If desired, a matte releasable base material may be used. The thickness of the epidermis is 5-40μ
About m is preferable. The adhesive layer may be a known heat-sealable adhesive such as acrylic, polyester, polyvinyl acetate, polyurethane, or polyamide, or a one-component or two-component adhesive such as acrylic, epoxy, or urethane. Adhesives such as acrylic, silicone, etc. can be arbitrarily used, and polyurethane-based heat-sealable adhesives are preferred in view of workability, elastic coating, adhesion to foamed polyurethane blocks, flexibility, etc. The thickness of these adhesive layers is 5
The thickness is about 80 μm, and the thickness of the entire elastic coating (skin + adhesive layer) is preferably about 10 to 120 μm. If the thickness of the elastic coating is less than 10 μm, the strength of the coating will be insufficient, while if it exceeds 120 μm, it will be uneconomical.
【0010】又、接着剤層がヒートシール型の接着剤で
ある場合には、接着剤層の軟化温度は100〜150℃
程度が好ましく、この場合には表皮は接着剤層の軟化点
よりも10℃以上高い軟化点を有することが好ましい、
接着剤層と表皮の軟化点が接近しすぎていると、ブロッ
ク状軟質発泡ポリウレタンに弾性被膜を熱接着させる場
合に作業性が低下するので好ましくない。尚、上記にお
いて接着剤層6の形成は必須ではなく、弾性被膜2が熱
接着性である場合には、その熱接着性を利用して直接ブ
ロック状発泡ウレタンに弾性被膜を転写させることが出
来る。[0010] When the adhesive layer is a heat-sealable adhesive, the softening temperature of the adhesive layer is 100 to 150°C.
In this case, the skin preferably has a softening point that is 10°C or more higher than the softening point of the adhesive layer.
If the softening points of the adhesive layer and the skin are too close to each other, it is not preferable because workability decreases when an elastic coating is thermally bonded to a block-shaped flexible polyurethane foam. Note that the formation of the adhesive layer 6 is not essential in the above, and if the elastic coating 2 is thermally adhesive, the elastic coating can be directly transferred to the block-shaped urethane foam using the thermal adhesiveness. .
【0011】以上の如くブロック状軟質発泡ポリウレタ
ンの表面に貼着される弾性被膜は通気性であることが要
求される。通気性はブロック状軟質発泡ポリウレタン表
面に転写する以前の被膜にパンチングや針等で予め多数
の孔を設けていてもよいし、ブロック状軟質発泡ポリウ
レタン表面に被膜を転写後に針等で必要なだけ孔を設け
てもよいし、更に別の方法で通気性にしてもよい。通気
性の程度は孔の大きさや数によって任意に調整すること
が出来、本発明において好ましい通気性は復元時間(後
の定義する)で表すと10〜400秒の範囲である。復
元時間が上記範囲を越えると、吸音材を圧縮縮小するの
に時間がかかり、又、復元にも時間がかかりすぎる。一
方、復元時間が短すぎると縮小は容易であるが復元が早
すぎ作業性が不十分である。As described above, the elastic coating attached to the surface of the block-shaped flexible polyurethane foam is required to be breathable. Air permeability can be determined by punching or using a needle to provide a large number of holes in the coating before it is transferred to the surface of the block-shaped soft polyurethane foam, or by punching as many holes as necessary with a needle after transferring the coating to the block-shaped flexible polyurethane foam surface. It may be provided with holes or may be made breathable by other methods. The degree of air permeability can be arbitrarily adjusted by the size and number of holes, and in the present invention, preferable air permeability is in the range of 10 to 400 seconds when expressed in terms of recovery time (defined later). If the restoration time exceeds the above range, it will take time to compress and reduce the sound absorbing material, and it will also take too much time to restore it. On the other hand, if the restoration time is too short, reduction is easy, but restoration is too quick and workability is insufficient.
【0012】発泡ポリウレタンブロックに対する弾性被
膜の転写は通常の方法でよい。例えば図1の発泡ポリリ
ウレタンブロックの面に弾性被膜を転写する場合には、
図4に示す様に、好ましくはブロック1の1個の平面よ
りも幾分大きなサイズに弾性被膜を形成した離型性基材
を裁断し、例えば、ホットプレート等に離型性基材の裏
面を重ねて加熱し、接着剤層を活性化し、その面の発泡
ポリウレタンブロックの面を押圧接着させ、しかる後離
型性基材を剥離すればよい。この操作を繰り返すことに
よって多角形発泡ポリウレタンブロックの全面に弾性被
膜を転写させることが出来る。The elastic coating may be transferred to the foamed polyurethane block by any conventional method. For example, when transferring an elastic coating to the surface of the foamed polyurethane block shown in Figure 1,
As shown in FIG. 4, the releasable base material on which the elastic coating is formed is cut, preferably to a size somewhat larger than one plane of the block 1, and the back side of the releasable base material is placed on a hot plate or the like. are layered and heated to activate the adhesive layer, press-bond the surface of the foamed polyurethane block on that surface, and then peel off the releasable base material. By repeating this operation, the elastic coating can be transferred to the entire surface of the polygonal polyurethane foam block.
【0013】本発明の別の実施態様では、上記で得られ
た吸音材を圧縮縮小し、ある程度の強度のある容器内に
収納しておく。そして必要に応じで縮小体を取り出し、
これを狭い管内の所定の箇所に装入し、しばらくすると
縮小体は元の体積に復元するので、復元体は菅内の所望
の位置に固定される。この場合、復元体のサイズを固定
する空間よりも場所よりも数%〜数十%大きく設計して
おくことにより、設置場所においては常に復元力が作用
しているので発泡体は管内にしっかりと固定されズレた
るすることがない。In another embodiment of the present invention, the sound absorbing material obtained above is compressed and reduced and stored in a container having a certain degree of strength. Then, if necessary, take out the reduced body,
This is inserted into a predetermined position within a narrow tube, and after a while the reduced body returns to its original volume, so that the restored body is fixed at a desired position within the tube. In this case, by designing the size of the restoration body to be several percent to several tens of percent larger than the space in which it is fixed, the foam can be firmly placed inside the pipe because a restoring force is always acting at the installation location. It is fixed and will not shift.
【0014】[0014]
【実施例】次に実施例を挙げて本発明を更に具体的に説
明する。尚、文中部又は%とあるのは特に断りのない限
り重量基準である。EXAMPLES Next, the present invention will be explained in more detail with reference to Examples. It should be noted that unless otherwise specified, the terms in the text or % are based on weight.
【0015】実施例1
ポリウレタン樹脂溶液(レザミンME−3612LP、
100%モジュラス60Kg/cm2、軟化温度140
℃、大日精化工業製、固形分30%)100部にメチル
エチルケトン50部を加え、ミキサーで均一に混合して
ポリウレタン塗料を得た。この塗料を離型紙(EV13
0TA−7、リンテック製)の表面に塗料として250
g/m2の割合で塗布し、60℃で5分間及び130℃
で20分間乾燥し、厚み50μmのフイルムを形成した
。このフイルムを図4の様に150℃に温度調整したホ
ットプレート(不図示)上に置き、図1の形状の発泡ポ
リウレタンブロックの一面を接着させ発泡ポリウレタン
ブロックを30秒間軽く押圧した後、ホットプレートか
ら取り出し離型紙5を剥離した。この操作を全部で5回
繰り返し、ブッロック全面にポリウレタンの被膜を転写
させた。次に先端鋭利で中心部の太さが1mmの針を2
cm間隔で4本固定した装置で5面に種々の割合で通気
孔を形成し、下記表1に記載の本発明の吸音材とした。
尚、復元時間は吸音材を容積1/3にまで手で圧縮縮小
させ、放置して体積の90%以上に復元するまでの時間
とした(以下同様)。Example 1 Polyurethane resin solution (Lethermin ME-3612LP,
100% modulus 60Kg/cm2, softening temperature 140
50 parts of methyl ethyl ketone was added to 100 parts (solid content: 30%, manufactured by Dainichiseika Chemical Industry Co., Ltd.) and mixed uniformly with a mixer to obtain a polyurethane paint. Apply this paint to release paper (EV13)
0TA-7, made by Lintec) as a paint on the surface.
g/m2 for 5 minutes at 60°C and 130°C.
The film was dried for 20 minutes to form a film with a thickness of 50 μm. This film was placed on a hot plate (not shown) whose temperature was adjusted to 150°C as shown in Figure 4, one side of the foamed polyurethane block in the shape of Figure 1 was adhered, and the foamed polyurethane block was lightly pressed for 30 seconds. It was taken out and the release paper 5 was peeled off. This operation was repeated a total of five times to transfer the polyurethane film to the entire surface of the block. Next, use 2 needles with a sharp tip and a diameter of 1 mm in the center.
Ventilation holes were formed at various ratios on five sides using a device in which four holes were fixed at cm intervals to obtain the sound absorbing material of the present invention as shown in Table 1 below. The restoring time was defined as the time required to manually compress the sound absorbing material to 1/3 of its volume, leave it to stand, and restore it to 90% or more of its volume (the same applies hereinafter).
【0016】表1
サンプル 復元時間A
約1秒B
約7秒C
約31秒D 約7
8秒E 約100秒F
約126秒G
約250秒H
約500秒サンプルA〜Bのブロックは、縮小は容
易であるが復元が早すぎ、作業性が不十分であった。一
方、サンプルHのブロックは縮小及び復元に時間がかか
りずぎ、同様に作業性が不十分であった。又、上記実施
例C〜Gのブロックを1/4に圧縮縮小したものを、ス
チール製の容器(内容積は圧縮縮小体と同一)に充填し
、3日後に容器から取り出し、1辺10cmの塩化ビニ
ル製矩形管のコーナー部に手て装入したところ、5分後
にはブロックが完全に管のコーナー部に固定され、強い
振動を与えても位置ずれを発生しなかった。Table 1 Sample restoration time A
Approximately 1 secondB
Approximately 7 seconds C
Approximately 31 seconds D Approximately 7
8 seconds E approximately 100 seconds F
Approximately 126 seconds G
Approximately 250 seconds H
The blocks of samples A to B, which lasted approximately 500 seconds, were easy to reduce, but were restored too quickly, resulting in insufficient workability. On the other hand, the block of sample H took too much time to reduce and restore, and the workability was similarly insufficient. In addition, the blocks of Examples C to G above were compressed and reduced to 1/4 and filled into a steel container (the internal volume is the same as the compressed and reduced body), and after 3 days, the blocks were taken out from the container and placed in a container with a side of 10 cm. When the block was manually inserted into the corner of a rectangular pipe made of vinyl chloride, the block was completely fixed to the corner of the pipe after 5 minutes and did not shift even when subjected to strong vibrations.
【0017】実施例2
ポリウレタンウレア樹脂溶液(レザミンNE−5904
、100%モジュラス95Kg/cm2、軟化温度17
0℃、大日精化工業製、固形分25%)100部にイソ
プロピルアルコール10部及びトルエン15部を加え、
ミキサーで均一に混合してポリウレタンウレア塗料を得
た。この塗料を離型紙(EV130TP(R2)、リン
テック製)の表面に塗料として100g/m2の割合で
塗布し、60℃で3分間及び120℃で5分間乾燥し、
厚み20μmのフイルムを形成した。更にその上にポリ
ウレタン樹脂ヒートシール剤溶液(レザミンME88N
FLP、100%モジュラス30Kg/cm2、軟化温
度115℃、大日精化工業製、固形分30%)100部
にメチルエチルケトン20部を加え、ミキサーで均一に
混合してポリウレタン塗料を作成し、この塗料を上記の
ポリウレタンポリウレアフイルムの表面に塗料として2
00g/m2の割合で塗布し、60℃で3分間及び12
0℃で10分間乾燥し、厚み50μmのヒートシール剤
フイルムを形成した。このフイルムを135℃に温度調
整したホットプレート上に置き、円柱形の発泡ポリウレ
タン(直径60mm×高さ200mm)の曲面を転がし
ながら軽く押圧しながらゆっくりと転がして接着させた
後、ホットプレートから取り出し離型紙を剥離した。更
に実施例1と同様にして底面及び上面にフイルムを転写
させ、ブッロック全面にポリウレタンの被膜を転写させ
た。次に先端鋭利で中心部の太さが1mmの針を2cm
間隔で4本固定した装置で3面に種々の割合で通気孔を
形成し、下記表2に記載の本発明の吸音材とした。Example 2 Polyurethane urea resin solution (Lethermin NE-5904
, 100% modulus 95Kg/cm2, softening temperature 17
0°C, Dainichiseika Kogyo Co., Ltd., solid content 25%) to 100 parts, add 10 parts of isopropyl alcohol and 15 parts of toluene,
A polyurethane urea paint was obtained by uniformly mixing with a mixer. This paint was applied as a paint on the surface of release paper (EV130TP (R2), manufactured by Lintec) at a rate of 100 g/m2, dried at 60°C for 3 minutes and at 120°C for 5 minutes,
A film with a thickness of 20 μm was formed. Furthermore, on top of that, a polyurethane resin heat sealing agent solution (LEZAMIN ME88N
Add 20 parts of methyl ethyl ketone to 100 parts of FLP, 100% modulus 30Kg/cm2, softening temperature 115℃, manufactured by Dainichiseika Chemical Industry, solid content 30%), mix uniformly with a mixer to create a polyurethane paint, and add this paint. 2 as a paint on the surface of the above polyurethane polyurea film.
00 g/m2 and heated at 60°C for 3 minutes and 12
It was dried at 0° C. for 10 minutes to form a heat sealant film with a thickness of 50 μm. This film was placed on a hot plate whose temperature was adjusted to 135°C, and the curved surface of a cylindrical polyurethane foam (diameter 60 mm x height 200 mm) was rolled slowly while being lightly pressed to adhere it, and then removed from the hot plate. The release paper was peeled off. Furthermore, in the same manner as in Example 1, a film was transferred to the bottom and top surfaces, and a polyurethane coating was transferred to the entire surface of the block. Next, use a 2cm needle with a sharp tip and a 1mm thick center.
Ventilation holes were formed at various ratios on three sides using a device in which four holes were fixed at intervals to obtain the sound absorbing material of the present invention as shown in Table 2 below.
【0018】表2
サンプル 復元時間A
約1秒B
約8秒C
約35秒D
約69秒E 約130
秒F 約120秒G
約300秒H
約480秒Table 2 Sample restoration time A
Approximately 1 secondB
Approximately 8 seconds C
Approximately 35 seconds D
Approximately 69 seconds E approximately 130
Second F Approximately 120 seconds G
Approximately 300 seconds H
Approximately 480 seconds
【0019】サンプルA〜Bの
ブロックは、縮小は容易であるが復元が早すぎ、作業性
が不十分であった。一方、サンプルHのブロックは縮小
及び復元に時間がかかりずぎ、同様に作業性が不十分で
あった。又、上記実施例C〜Gのブロックを1/4に圧
縮縮小したものを、スチール製の容器(内容積は圧縮縮
小体と同一)に充填し、7日後に容器から取り出し、直
径50mmの塩化ビニル製管の内部に棒で装入したとこ
ろ、6分後にはブロックが完全に管内に固定され、強い
振動を与えても位置ずれを発生しなかった。尚、上記に
おいて、100%モジュラスは、30〜50μmの厚み
に形成したフイルムを縦6cm、横1.5cmに裁断し
て離型紙からフイルムを剥離し、島津オートグラフAG
−500Aを使用し、クロスヘッドスピード200mm
/min.、チャートスピード100mm/min.、
測定温度25℃の条件で抗張力/伸度曲線より測定した
。軟化温度の測定では、上記と同一のフイルムを作成し
、フイルムの片方を固定し、もう一方の辺に450g/
cm2の荷重を掛け、ギヤオーブン中にセットし、昇温
速度2℃/min.で昇温し、フイルムが切断した温度
を軟化点とした。又、以上の実施例において発泡ポリウ
レタンブロックの形状は円柱状、球状、楕円球状、直方
体等任意の形状でよく、これらを充填する場所の形状に
合わせればよく、特に限定されない。Although the blocks of samples A to B were easy to reduce, they were restored too quickly and had insufficient workability. On the other hand, the block of sample H took too much time to reduce and restore, and the workability was similarly insufficient. In addition, the blocks of Examples C to G above were compressed and reduced to 1/4 and filled into a steel container (the internal volume is the same as the compressed and reduced body), and after 7 days, the blocks were taken out from the container and chlorinated with a diameter of 50 mm. When the block was inserted into a vinyl tube using a rod, it was completely fixed inside the tube after 6 minutes and did not shift even when subjected to strong vibrations. In the above, 100% modulus is determined by cutting a film formed to a thickness of 30 to 50 μm into 6 cm long and 1.5 cm wide, peeling the film from release paper, and using Shimadzu Autograph AG.
- Using 500A, crosshead speed 200mm
/min. , chart speed 100mm/min. ,
Measurement was performed using a tensile strength/elongation curve at a measurement temperature of 25°C. To measure the softening temperature, the same film as above was prepared, one side of the film was fixed, and 450 g/g was added to the other side.
A load of cm2 was applied, the temperature was set in a gear oven, and the temperature was increased at a rate of 2°C/min. The temperature at which the film was cut was taken as the softening point. Further, in the above embodiments, the shape of the foamed polyurethane block may be any shape such as a columnar shape, a spherical shape, an ellipsoidal shape, a rectangular parallelepiped, etc., and is not particularly limited as long as it matches the shape of the place where it is filled.
【0020】[0020]
【効果】以上の如き本発明によれば、装置或は外界の騒
音が各種通風路等を経由して室内等に侵入するのを防止
するのに適し、更に狭い通風路内等に設置が容易である
吸音材を提供することが出来る。[Effects] According to the present invention as described above, it is suitable for preventing equipment or external noise from entering a room through various ventilation channels, etc., and can be easily installed in narrow ventilation channels. It is possible to provide a sound absorbing material that is
【0021】[0021]
【図1】本発明の吸音材の1例を示す図。FIG. 1 is a diagram showing an example of the sound absorbing material of the present invention.
【図2】第1図のA−A断面図。FIG. 2 is a sectional view taken along line AA in FIG. 1;
【図3】縮小した状態の本発明の吸音材の1例を示す図
。FIG. 3 is a diagram showing an example of the sound absorbing material of the present invention in a contracted state.
【図4】本発明方法を図解的に説明する図。FIG. 4 is a diagram schematically explaining the method of the present invention.
1:ポリウレタンブロック 2:弾性被膜 3:縮小体 4:容器 5:離型性基材 6:接着剤層 1: Polyurethane block 2: Elastic coating 3: Reduced field 4: Container 5: Releaseable base material 6: Adhesive layer
Claims (11)
の表面に設けられた通気性弾性被膜からなることを特徴
とする吸音材。1. A sound absorbing material comprising a block-shaped flexible polyurethane foam and a breathable elastic coating provided on its surface.
又はポリ(ウレタン−ウレア)からなる請求項1に記載
の吸音材。2. The sound absorbing material according to claim 1, wherein the elastic coating is made of polyurethane, polyurea or poly(urethane-urea).
項1に記載の吸音材。3. The sound absorbing material according to claim 1, wherein the elastic coating is made of a thermoadhesive resin.
層構成からなる請求項1に記載の吸音材。4. The sound absorbing material according to claim 1, wherein the elastic coating has a multilayer structure including a skin and an adhesive layer.
って、表皮と接着剤層との軟化点の差が10℃以上ある
請求項4に記載の吸音材。5. The sound absorbing material according to claim 4, wherein the adhesive layer is a heat-sealable adhesive, and the difference in softening point between the skin and the adhesive layer is 10° C. or more.
ある請求項1に記載の吸音材。6. The sound absorbing material according to claim 1, wherein the elastic coating has a thickness of 10 to 120 μm.
〜200Kg/cm2である請求項1に記載の吸音材。Claim 7: The 100% modulus of the elastic coating is 10.
The sound absorbing material according to claim 1, wherein the sound absorbing material has a weight of 200 Kg/cm2.
る請求項1に記載の吸音材。8. The sound absorbing material according to claim 1, wherein the restoration time is in the range of 10 to 400 seconds.
該弾性被膜をブロック状軟質発泡ポリウレタンの表面に
転写することを特徴とする吸音材の製造方法。9. Forming an elastic coating on the surface of the releasable base material,
A method for producing a sound absorbing material, which comprises transferring the elastic coating onto the surface of a block-shaped soft polyurethane foam.
孔を設ける請求項9に記載の吸音材の製造方法。10. The method for producing a sound absorbing material according to claim 9, wherein vent holes are provided in the elastic coating before or after the transfer.
し、該縮小体を容器内に収容してなることを特徴とする
吸音材。11. A sound absorbing material, characterized in that the sound absorbing material according to claim 1 is compressed and reduced, and the reduced body is housed in a container.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2415402A JP2571202B2 (en) | 1990-12-28 | 1990-12-28 | Sound absorbing material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2415402A JP2571202B2 (en) | 1990-12-28 | 1990-12-28 | Sound absorbing material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04232735A true JPH04232735A (en) | 1992-08-21 |
JP2571202B2 JP2571202B2 (en) | 1997-01-16 |
Family
ID=18523765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2415402A Expired - Lifetime JP2571202B2 (en) | 1990-12-28 | 1990-12-28 | Sound absorbing material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2571202B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994011222A1 (en) * | 1992-11-07 | 1994-05-26 | Helmut Pelzer | Moulded article designed to absorb airborne sound |
JP2002328680A (en) * | 2001-04-26 | 2002-11-15 | Inoac Corp | Melamine acoustic material and method of manufacturing the same |
JP2012255967A (en) * | 2011-06-10 | 2012-12-27 | Aisin Chemical Co Ltd | Thermosetting sound insulation coating composition |
WO2020013784A3 (en) * | 2018-07-11 | 2020-03-26 | Arcelik Anonim Sirketi | Insulation plate comprising sound damping member |
-
1990
- 1990-12-28 JP JP2415402A patent/JP2571202B2/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994011222A1 (en) * | 1992-11-07 | 1994-05-26 | Helmut Pelzer | Moulded article designed to absorb airborne sound |
EP0666806A1 (en) * | 1992-11-07 | 1995-08-16 | Helmut Pelzer | Moulded article designed to absorb airborne sound. |
JP2002328680A (en) * | 2001-04-26 | 2002-11-15 | Inoac Corp | Melamine acoustic material and method of manufacturing the same |
JP2012255967A (en) * | 2011-06-10 | 2012-12-27 | Aisin Chemical Co Ltd | Thermosetting sound insulation coating composition |
WO2020013784A3 (en) * | 2018-07-11 | 2020-03-26 | Arcelik Anonim Sirketi | Insulation plate comprising sound damping member |
Also Published As
Publication number | Publication date |
---|---|
JP2571202B2 (en) | 1997-01-16 |
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