JP2015017188A - Foam - Google Patents

Foam Download PDF

Info

Publication number
JP2015017188A
JP2015017188A JP2013145303A JP2013145303A JP2015017188A JP 2015017188 A JP2015017188 A JP 2015017188A JP 2013145303 A JP2013145303 A JP 2013145303A JP 2013145303 A JP2013145303 A JP 2013145303A JP 2015017188 A JP2015017188 A JP 2015017188A
Authority
JP
Japan
Prior art keywords
foam
flame retardant
component
sound absorption
foaming
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.)
Abandoned
Application number
JP2013145303A
Other languages
Japanese (ja)
Inventor
上原　建彦
Tatsuhiko Uehara
建彦 上原
昂 上別府
Takashi Kamibeppu
昂 上別府
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
Original Assignee
Yazaki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yazaki Corp filed Critical Yazaki Corp
Priority to JP2013145303A priority Critical patent/JP2015017188A/en
Publication of JP2015017188A publication Critical patent/JP2015017188A/en
Abandoned legal-status Critical Current

Links

Images

Landscapes

  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a foam with excellent sound absorbency and incombustibility in which paper is used as a part of a foaming material.SOLUTION: A foam 1A is made up of foam cells S2 and S3 having a large number of spaces formed therein by using, as a foaming component of steam expansion, a pulp fiber component, a synthetic resin component, a starch component as an auxiliary material, a flame retardant that has water solubility and permeability into the pulp fiber component and the starch component. The flame retardant is phosphorus-based flame retardant, for example, ammonium phosphate.

Description

本発明は、パルプ繊維成分と合成樹脂成分と補助剤としての澱粉成分とを発泡材とした発泡体に関する。   The present invention relates to a foamed product using a pulp fiber component, a synthetic resin component, and a starch component as an auxiliary agent as a foaming material.

従来より紙を発泡材の一部として利用した発泡体が提案されている（特許文献１、２参照）。この発泡体は、パルプ繊維成分として古紙を使用できるため、紙のリサイクルに好適である。そして、発泡体は、多数の空間を形成した発泡セルが密集状態に配置されるため、吸音性に優れている。   Conventionally, a foam using paper as a part of a foam material has been proposed (see Patent Documents 1 and 2). Since this foam can use waste paper as a pulp fiber component, it is suitable for paper recycling. And since the foaming cell which formed many spaces is arrange | positioned in a dense state, the foam is excellent in sound absorption.

特許第３３２６１５６号公報Japanese Patent No. 3326156 特開２０００−２７３８００号公報JP 2000-273800 A

しかしながら、紙を発泡材の一部として利用した発泡体は、紙や澱粉成分が燃焼の芯材となり燃えやすいため、難燃性に劣るという問題があった。   However, the foam using paper as a part of the foaming material has a problem that it is inferior in flame retardancy because the paper and starch components become a burning core material and easily burn.

そこで、本発明は、前記した課題を解決すべくなされたものであり、紙を発泡材の一部とするものにあって、吸音性と難燃性に優れた発泡体を提供することを目的とする。   Therefore, the present invention has been made to solve the above-described problems, and has an object of providing a foam having excellent sound absorption and flame retardancy, in which paper is part of a foam material. And

本発明は、パルプ繊維成分と、合成樹脂成分と、補助剤としての澱粉成分と、水溶性で、且つ、パルプ繊維成分や澱粉成分内に浸透性のある難燃剤とを水蒸気発泡の発泡成分とし、多数の空間を形成した発泡セルより構成されたことを特徴とする発泡体である。   The present invention uses a pulp fiber component, a synthetic resin component, a starch component as an auxiliary agent, a water-soluble flame retardant that is permeable in the pulp fiber component and the starch component as a foaming component for steam foaming. It is a foam characterized by comprising foam cells in which a large number of spaces are formed.

難燃剤は、リン系難燃剤であっても良く、例えばリン酸アンモニウムである。難燃剤は、グアニジン系難燃剤であっても良く、例えばアピノン（登録商標）−１０１、アピノン（登録商標）−３０３である。   The flame retardant may be a phosphorus flame retardant, for example, ammonium phosphate. The flame retardant may be a guanidine-based flame retardant, such as Apinone (registered trademark) -101, Apinone (registered trademark) -303.

構造体の密度は、３５ｋｇ／ｍ３〜４０ｋｇ／ｍ３の範囲であることが好ましい。 Density of the structures is preferably in the range of 35kg / m 3 ~40kg / m 3 .

本発明によれば、外部から音が発泡体に入射すると、入射振動によって発泡体が固有の振動数で固体振動し、入射振動と固体振動の相殺によって吸音すると共に、発泡体の表面より内部に進入する入射波と、内部を透過した後に反射して来る透過反射波との相殺によっても吸音する。つまり、固有振動による吸音と位相速度による吸音によって吸音性能が得られる。また、発泡体が多孔質形態であり、内部に進入する音が振動エネルギーによって吸収されるため、多孔質形態による吸音性能が得られる。   According to the present invention, when sound is incident on the foam from the outside, the foam vibrates at a specific frequency by incident vibration, absorbs the sound by canceling the incident vibration and the solid vibration, and enters the inside from the surface of the foam. Sound absorption is also achieved by canceling the incoming incident wave and the transmitted reflected wave that is reflected after passing through the interior. That is, sound absorption performance is obtained by sound absorption due to natural vibration and sound absorption due to phase velocity. Moreover, since the foam is in a porous form and the sound entering the inside is absorbed by vibration energy, sound absorbing performance by the porous form is obtained.

また、リン系難燃剤は、パルプ繊維成分や澱粉成分内に浸透し、燃焼時には、パルプ繊維成分や澱粉成分が炭化して燃え残り、且つ、垂れ下がることなく徐々にしか燃え進んでいかないため、燃焼速度を遅らせる。以上より、発泡体は吸音性と難燃性に優れている。   In addition, the phosphorus-based flame retardant penetrates into the pulp fiber component and starch component, and at the time of combustion, the pulp fiber component and starch component carbonize and remain unburned, and burn only gradually without sagging, Reduce burning speed. From the above, the foam is excellent in sound absorption and flame retardancy.

本発明の一実施形態を示し、発泡体の外観斜視図である。1 is an external perspective view of a foam according to an embodiment of the present invention. 本発明の一実施形態を示し、発泡体の構造模式図である。1 shows an embodiment of the present invention and is a structural schematic diagram of a foam. FIG. 本発明の一実施形態を示し、（ａ）は押出し成形機の要部斜視図、（ｂ）は口金部材の正面図である。1 shows an embodiment of the present invention, (a) is a perspective view of a main part of an extrusion molding machine, and (b) is a front view of a base member. 本発明の一実施形態を示し、シンサレートと難燃剤としてリン酸アンモニウムを配合した発泡体における残響室法による吸音率の特性線図である。It is a characteristic line figure of the sound absorption rate by the reverberation chamber method in the foam which shows one Embodiment of this invention and mix | blended ammonium phosphate as a cinnalate and a flame retardant. 本発明の一実施形態を示し、リン酸アンモニウムの配合量と燃焼速度の測定結果を示す図である。It is a figure which shows one Embodiment of this invention and shows the measurement result of the compounding quantity and burning rate of ammonium phosphate. 本発明の一実施形態を示し、シンサレートと難燃剤としてアピノン−１０１を配合した発泡体における残響室法による吸音率の特性線図である。It is a characteristic line figure of the sound absorption rate by the reverberation chamber method in the foam which mix | blended apinone-101 as a synthetic salt and a flame retardant which shows one Embodiment of this invention. 本発明の一実施形態を示し、アピノン−１０１の配合量と燃焼速度の測定結果を示す図である。It is a figure which shows one Embodiment of this invention and shows the measurement result of the compounding quantity of apinon-101, and a combustion rate. 本発明の他の実施形態を示し、発泡体の構造模式図である。FIG. 3 is a structural schematic diagram of a foam, showing another embodiment of the present invention. 本発明の他の実施形態を示し、（ａ）は押出し成形機の要部斜視図、（ｂ）は口金部材の正面図である。The other embodiment of this invention is shown, (a) is a principal part perspective view of an extrusion molding machine, (b) is a front view of a nozzle | cap | die member.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（一実施形態）
図１〜図５は本発明の一実施形態を示す。図１に示すように、発泡体１Ａは、偏平長方形の板状発泡体である。発泡体１Ａは、パルプ繊維成分である紙粉末成分と、合成樹脂成分と、補助剤としての澱粉成分であるコーンスターチと、難燃剤とを水蒸気発泡の発泡成分とし、多数の空間を形成した発泡セルＳ２，Ｓ３より構成されている（図２参照）。紙粉末成分としては、官製葉書等の古紙を紙粉末繊維状にしたものを使用している。合成樹脂成分としては、例えばポリプロピレン樹脂を使用している。 (One embodiment)
1 to 5 show an embodiment of the present invention. As shown in FIG. 1, the foam 1A is a flat rectangular plate-like foam. Foam 1A is a foam cell in which a paper powder component, which is a pulp fiber component, a synthetic resin component, corn starch, which is a starch component as an auxiliary agent, and a flame retardant, are used as foaming components for water vapor foaming to form a large number of spaces. It consists of S2 and S3 (see FIG. 2). As the paper powder component, used paper such as government postcards made into paper powder fiber is used. As the synthetic resin component, for example, polypropylene resin is used.

難燃材は、水溶性で、且つ、パルプ繊維成分や澱粉成分内に浸透性のあるものである。難燃剤は、例えばリン系難燃剤、グアニジン系難燃剤である。   The flame retardant is water-soluble and is permeable into the pulp fiber component and starch component. The flame retardant is, for example, a phosphorus flame retardant or a guanidine flame retardant.

各発泡セルＳ２，Ｓ３は、内部の空隙がセル皮膜によって被われている。発泡セルＳ２，Ｓ３は、その位置によって発泡密度（発泡倍率）が異なり、発泡体１Ａは発泡セルＳ２，Ｓ３の密度によって以下のような層構造に形成される。   As for each foaming cell S2, S3, the internal space | gap is covered with the cell membrane | film | coat. The foam cells S2 and S3 have different foam densities (foaming ratios) depending on their positions, and the foam 1A is formed in the following layer structure depending on the density of the foam cells S2 and S3.

つまり、発泡体１Ａは、厚み方向に沿って、表面皮膜層２と発泡セル層３と表面皮膜層２とから構成されている。各表面皮膜層２は、極薄厚みであり、発泡セル層３より発泡密度が高い発泡セルＳ２が密集配置されている。発泡セル層３は、各表面皮膜層２より発泡密度が低い発泡セルＳ３が密集配置されている。   That is, 1 A of foams are comprised from the surface film layer 2, the foam cell layer 3, and the surface film layer 2 along the thickness direction. Each surface coating layer 2 has an extremely thin thickness, and foam cells S2 having a foam density higher than the foam cell layer 3 are densely arranged. In the foam cell layer 3, foam cells S3 having a foam density lower than that of each surface coating layer 2 are densely arranged.

又、発泡セル層３には、厚み方向の直交方向に沿って等間隔に複数の縦仕切皮膜層５が形成されている。発泡セル層３は、縦仕切皮膜層５によって分割されている。縦仕切皮膜層５は、発泡セル層３より発泡密度が高い発泡セルＳ２が密集配置されている。   The foamed cell layer 3 is formed with a plurality of vertical partition coating layers 5 at equal intervals along the direction perpendicular to the thickness direction. The foam cell layer 3 is divided by the longitudinal partition film layer 5. In the vertical partition coating layer 5, foam cells S <b> 2 having a foam density higher than that of the foam cell layer 3 are densely arranged.

次に、上記発泡体１Ａを製造する押出し成形機１０を説明する。押出し成形機１０は、図３（ａ）に示すように、各発泡材を投入する投入口（図示せず）と、投入された発泡材を混練する混練手段（図示せず）と、混練された発泡材を高温に加熱する加熱手段（図示せず）と、発泡材を押圧する押圧手段（図示せず）と、押圧室の先端側を塞ぐように配置された口金部材１１と、この口金部材１１の外側を囲むように配置された規制枠壁２０とを備えている。口金部材１１は、図３（ａ）、（ｂ）に示すように、水平方向（一方向）に等間隔Ｐを置いて配置された複数の吐出口１２を１段有する。各吐出口１２は、水平方向に対し同じ位置に配置されている。規制枠壁２０は、この吐出口１２より吐出された発泡材の発泡領域を規制する。規制枠壁２０は、偏平長方形状の枠である。   Next, an extrusion molding machine 10 that manufactures the foam 1A will be described. As shown in FIG. 3A, the extrusion molding machine 10 is kneaded with an inlet (not shown) for charging each foamed material, and a kneading means (not shown) for kneading the charged foamed material. A heating means (not shown) for heating the foamed material to a high temperature, a pressing means (not shown) for pressing the foamed material, a base member 11 arranged so as to close the front end side of the pressing chamber, and the base And a regulating frame wall 20 disposed so as to surround the outside of the member 11. As shown in FIGS. 3A and 3B, the base member 11 has a plurality of discharge ports 12 arranged at equal intervals P in the horizontal direction (one direction). Each discharge port 12 is arrange | positioned in the same position with respect to the horizontal direction. The restriction frame wall 20 restricts the foaming region of the foam material discharged from the discharge port 12. The regulation frame wall 20 is a flat rectangular frame.

次に、発泡体１Ａの製造方法を説明する。押出し成形機１０内に、紙粉末成分とポリプロピレン樹脂材と補助剤としてのコーンスターチとリン酸アンモニウム水溶液と水を供給する。そして、紙粉末成分とポリプロピレン樹脂材とコーンスターチとリン酸アンモニウム水溶液と水を加熱混練し、この高温の発泡材を口金部材１１の１段の吐出口１２より押圧力によって吐出させる。   Next, a method for manufacturing the foam 1A will be described. A paper powder component, a polypropylene resin material, corn starch as an auxiliary agent, an ammonium phosphate aqueous solution, and water are supplied into the extrusion molding machine 10. Then, the paper powder component, the polypropylene resin material, corn starch, the ammonium phosphate aqueous solution, and water are heat-kneaded, and the high-temperature foam material is discharged from the discharge port 12 of the first stage of the base member 11 by pressing force.

すると、高温の発泡材に混入された水が各吐出口１２より吐出された瞬間に気化し、水の蒸気圧により紙粉末成分とポリプロピレン樹脂材とコーンスターチとリン酸アンモニウムから成る発泡材が発泡する。この発泡は、規制枠壁２０によって規制されるため、規制枠壁２０を断面積とする発泡体１Ａが連続的に押し出される。各発泡セルＳ２，Ｓ３は、紙粉末成分の柔軟性やコーンスターチの粘着性によって適度な発泡を行うことで内部に空間が形成されたものとなる。   Then, the water mixed in the high-temperature foam material is vaporized at the moment when the water is discharged from each discharge port 12, and the foam material composed of the paper powder component, the polypropylene resin material, corn starch, and ammonium phosphate is foamed by the water vapor pressure. . Since the foaming is regulated by the regulation frame wall 20, the foam 1A having the regulation frame wall 20 as a cross-sectional area is continuously extruded. Each foam cell S2, S3 has a space formed inside by performing appropriate foaming due to the flexibility of the paper powder component and the adhesiveness of corn starch.

また、各吐出口１２から吐出された発泡材は、自由に発泡できず、上記したように規制枠壁２０で発泡形成が抑制されると共に、発泡セル同士が互いに干渉することによって発泡形成が抑制される。具体的には、規制枠壁２０の内周近傍の位置する発泡セルＳ２は、規制枠壁２０で発泡形成が抑制される。これによって表面皮膜層２が形成される。水平方向の隣り合う吐出口１２の中間位置付近の位置する発泡セルＳ２は、互いの発泡セルＳ２同士が衝突（干渉）して発泡形成が抑制される。これによって縦仕切皮膜層５が形成される。これらより内側位置に位置する発泡セルＳ３は、上記発泡セルＳ２に較べて弱い抑制力しか働かない。これによって発泡セル層３が形成される。   Moreover, the foam material discharged from each discharge port 12 cannot be foamed freely, and as described above, foam formation is suppressed by the regulation frame wall 20 and foam formation is suppressed by the foam cells interfering with each other. Is done. Specifically, the foaming cell S <b> 2 located in the vicinity of the inner periphery of the regulation frame wall 20 is suppressed from being foamed by the regulation frame wall 20. Thereby, the surface film layer 2 is formed. In the foam cell S2 located near the intermediate position between the discharge ports 12 adjacent in the horizontal direction, the foam cells S2 collide (interfere) with each other, and foam formation is suppressed. Thereby, the vertical partition film layer 5 is formed. The foamed cell S3 located at the inner side of these functions only with a weak suppression force compared to the foamed cell S2. Thereby, the foam cell layer 3 is formed.

上記構造の発泡体１Ａにあって、外部から音が発泡体１Ａに入射すると、入射振動によって発泡体１Ａが固有の振動数で固体振動し、入射振動と固体振動の相殺によって吸音すると共に、発泡体１Ａの表面より内部に進入する入射波と、内部を透過した後に反射して来る透過反射波との相殺によっても吸音する。つまり、固有振動による吸音と位相速度による吸音とによって低周波数帯域で吸音ピーク性能が得られる。その一方で、発泡体１Ａは発泡セルＳ２，Ｓ３によって多孔質形態であるため、発泡体１Ａの内部に進入する音は内部で振動エネルギーによって吸収される。内部で振動エネルギーとなって吸収されるものは高周波数帯域のものが多く、高周波数帯域で高い吸音特性が得られる。   In the foam 1A having the above structure, when sound is incident on the foam 1A from the outside, the foam 1A vibrates at a specific frequency by incident vibration, absorbs sound by canceling the incident vibration and solid vibration, and foams. Sound absorption is also achieved by canceling the incident wave that enters the inside from the surface of the body 1A and the transmitted reflected wave that is reflected after passing through the inside. That is, the sound absorption peak performance can be obtained in the low frequency band by the sound absorption by the natural vibration and the sound absorption by the phase velocity. On the other hand, since the foam 1A is in a porous form by the foam cells S2 and S3, the sound entering the inside of the foam 1A is absorbed by vibration energy inside. Many of them are absorbed as vibration energy in the high frequency band, and high sound absorption characteristics can be obtained in the high frequency band.

また、難燃剤は、パルプ繊維成分や澱粉成分内に浸透し、燃焼のときに芯材の働きを行うパルプ繊維成分と澱粉成分を難燃化（炭化促進）する。これにより、燃焼時には、パルプ繊維成分や澱粉成分が炭化して燃え残り、且つ、垂れ下がることなく徐々にしか燃え進んでいかないため、発泡体１Ａの燃焼速度を遅らせる。以上より、発泡体１Ａは吸音性と難燃性に優れている。   Further, the flame retardant permeates into the pulp fiber component and the starch component, and makes the pulp fiber component and the starch component that act as a core material during combustion flame-retarded (acceleration of carbonization). Thereby, at the time of combustion, since the pulp fiber component and the starch component are carbonized and remain unburned and burn only gradually without sagging, the burning speed of the foam 1A is delayed. From the above, the foam 1A is excellent in sound absorption and flame retardancy.

（実験評価）
次に、難燃剤として、リン系難燃剤のリン酸アンモニウムを使用した場合と、グアニジン系難燃剤のアピノン（登録商標）−１０１（主成分：スルファミン酸グアニジン）を使用した場合の吸音性能と難燃性能の実験結果を説明する。 (Experimental evaluation)
Next, as a flame retardant, sound absorption performance and difficulty when using a phosphoric acid-based ammonium phosphate and a guanidine-based flame retardant Apinon (registered trademark) -101 (main component: guanidine sulfamate) are used. The experimental results of the fuel performance will be described.

図４は、シンサレート（登録商標）とリン系難燃剤のリン酸アンモニウムを難燃剤として配合した発泡体とにおける残響室法による吸音率測定結果である。   FIG. 4 is a result of sound absorption measurement by a reverberation chamber method in a foam in which Synsalate (registered trademark) and a phosphoric flame retardant ammonium phosphate are blended as a flame retardant.

シンサレートは、合繊の極細繊維を絡み合わせたもの（不織布）であり、ほぼ多孔質型による吸音性能を発揮する。   Synthalate is an intertwined fabric (nonwoven fabric) of synthetic fibers, and exhibits a sound absorption performance by a porous type.

合成樹脂成分としては、ポリプロピレン樹脂材のＪ８３０ＨＶ（株式会社プライムポリマーの商品名プライムポリプロの一種）を使用した。Ｊ８３０ＨＶは、メルトフローレイト（試験条件：２３０℃）が３０ｇ／１０ｍｉｎ、密度が９１０Ｋｇ／ｍ３、引っ張り降伏応力が２８．０ＭＰａ、引っ張り破壊呼びひずみが３０％、引っ張り弾性率が１４５０ＭＰａの物性を有する。   As the synthetic resin component, a polypropylene resin material J830HV (a type of Prime Polymer, a trade name of Prime Polymer Co., Ltd.) was used. J830HV has physical properties of a melt flow rate (test condition: 230 ° C.) of 30 g / 10 min, a density of 910 kg / m 3, a tensile yield stress of 28.0 MPa, a tensile fracture nominal strain of 30%, and a tensile elastic modulus of 1450 MPa.

図４に示すように、リン酸アンモニウムの配合量（紙粉末成分と合成樹脂成分に対する配合量）が１．５ｗｔ％（質量パーセント濃度）、３．６ｗｔ％、５．２ｗｔ％、８．３ｗｔ％の各種発泡体について、吸音特性を測定したが、リン酸アンモニウムを配合しなかった場合と同様の吸音特性が得られた。これにより、リン酸アンモニウムは、吸音性能に影響を与えないことが確認された。   As shown in FIG. 4, the blending amount of ammonium phosphate (the blending amount with respect to the paper powder component and the synthetic resin component) is 1.5 wt% (mass percent concentration), 3.6 wt%, 5.2 wt%, and 8.3 wt%. The sound absorption characteristics of the various foams were measured, but the same sound absorption characteristics as those obtained when no ammonium phosphate was added were obtained. Thereby, it was confirmed that ammonium phosphate does not affect sound absorption performance.

また、各種の発泡体は、固有振動による吸音と位相速度による吸音とにより吸音特性（吸音ピーク性能）が得られるため、シンサレートと比較して、高周波数帯域（ほぼ１３００Ｈｚ〜３０００Ｈｚ）では優れた吸音性能を発揮する。しかし、密度が３０ｋｇ／ｍ３、３２ｋｇ／ｍ３の各発泡体は、シンサレートと比較して、低周波数帯域（ほぼ１３００Ｈｚ以下）では同様若しくはそれ以下の吸音性能しか得られないことが確認された。密度が３５ｋｇ／ｍ３、３７ｋｇ／ｍ３の各発泡体は、シンサレートと比較して、低周波数帯域（ほぼ１３００Ｈｚ以下）でも優れた吸音性能を発揮することが確認された。つまり、発泡体の密度が多孔質効果による吸音性能に密接な関係があり、密度が３５ｋｇ／ｍ３以上の発泡体が好ましい。一方、密度が４１ｋｇ／ｍ３の発泡体は、他の発泡体の板厚（ｔ＝１０ｍｍ）よりも薄い板厚（ｔ＝８ｍｍ）のものしか作製できず、この板厚が原因となって、シンサレートと比較して、低周波数帯域（ほぼ１３００Ｈｚ以下）では低い吸音性能しか得られなかったと考えられる。以上より、構造体の密度が３５ｋｇ／ｍ３〜４０ｋｇ／ｍ３の範囲とすることによって優れた吸音性能を発揮する発泡体が得られる。 In addition, since various foams can obtain sound absorption characteristics (sound absorption peak performance) by sound absorption due to natural vibration and sound absorption due to phase velocity, they have excellent sound absorption in a high frequency band (almost 1300 Hz to 3000 Hz) compared to synthesizer. Demonstrate performance. However, it was confirmed that the foams having a density of 30 kg / m3 and 32 kg / m3 can obtain only the same or lower sound absorption performance in the low frequency band (approximately 1300 Hz or less) compared to the synthate. It was confirmed that the foams having a density of 35 kg / m3 and 37 kg / m3 exhibited excellent sound absorption performance even in a low frequency band (approximately 1300 Hz or less) as compared with the synthate. That is, the density of the foam is closely related to the sound absorption performance due to the porous effect, and a foam having a density of 35 kg / m 3 or more is preferable. On the other hand, a foam with a density of 41 kg / m3 can only be produced with a thickness (t = 8 mm) thinner than the thickness of other foams (t = 10 mm), and this thickness is the cause. Compared to the synthesizer, it is considered that only low sound absorption performance was obtained in the low frequency band (approximately 1300 Hz or less). Thus, the foam can be obtained density of the structure exhibits excellent sound absorption performance by a range of 35kg / m 3 ~40kg / m 3 .

図５は、リン酸アンモニウムの配合量と燃焼速度についての測定結果である。燃焼治具によって試験用発泡体を固定し、着火して燃え尽きる（完全炭化）までの燃焼時間を測定した。図５に示すように、リン酸アンモニウムを配合しなかった発泡体は、目標燃焼速度８０ｍｍ／ｍｉｎより燃焼速度が速い。これに対し、リン酸アンモニウムの配合量（紙粉末成分と合成樹脂成分に対する配合量）が１．５ｗｔ％、３．６ｗｔ％、５．２ｗｔ％、８．３ｗｔ％の各発泡体は、いずれも目標燃焼速度８０ｍｍ／ｍｉｎより燃焼速度が遅く、難燃性に優れていることが確認された。   FIG. 5 shows the measurement results for the amount of ammonium phosphate and the burning rate. The test foam was fixed with a combustion jig, and the combustion time until ignition and burning out (complete carbonization) was measured. As shown in FIG. 5, the foam in which ammonium phosphate is not blended has a burning rate higher than the target burning rate of 80 mm / min. On the other hand, each of the foams having a blending amount of ammonium phosphate (mixing amount with respect to the paper powder component and the synthetic resin component) of 1.5 wt%, 3.6 wt%, 5.2 wt%, and 8.3 wt% It was confirmed that the combustion speed was slower than the target combustion speed of 80 mm / min and the flame retardancy was excellent.

リン酸アンモニウムの配合量を増加すると、燃焼速度が遅くなることが確認された。目標燃焼速度を８０ｍｍ／ｍｉｎとする場合、最小３ｗｔ％の配合量とすることで確実に目標とする難燃性を達成できる。   It was confirmed that when the blending amount of ammonium phosphate was increased, the burning rate was reduced. When the target burning rate is 80 mm / min, the target flame retardance can be reliably achieved by setting the blending amount to a minimum of 3 wt%.

以上より、紙を発泡材の一部とする発泡体からなるものにあって、合成樹脂成分としてポリプロピレン樹脂を使用し、リン系難燃材のリン酸アンモニウムを最小３ｗｔ％配合し、構造体の密度が３５ｋｇ／ｍ３〜４０ｋｇ／ｍ３の範囲とすることによって優れた吸音性能を発揮する発泡体１Ａが得られる。 As mentioned above, it is a thing which consists of a foam which uses paper as a part of foaming material, uses a polypropylene resin as a synthetic resin component, mix | blends the phosphoric flame retardant material ammonium phosphate minimum 3 wt%, density foam 1A is obtained which exhibits excellent sound absorption performance by a range of 35kg / m 3 ~40kg / m 3 .

図６は、シンサレート（登録商標）とグアニジン系難燃剤のアピノン（登録商標）−１０１（主成分：スルファミン酸グアニジン）を難燃剤として配合した発泡体とにおける残響室法による吸音率測定結果である。   FIG. 6 is a sound absorption coefficient measurement result by a reverberation chamber method in a foam blended with Synsalate (registered trademark) and guanidine flame retardant Apinone (registered trademark) -101 (main component: guanidine sulfamate) as a flame retardant. .

合成樹脂成分としては、ポリプロピレン樹脂材のＪ８３０ＨＶ（株式会社プライムポリマーの商品名プライムポリプロの一種）を使用した。   As the synthetic resin component, a polypropylene resin material J830HV (a type of Prime Polymer, a trade name of Prime Polymer Co., Ltd.) was used.

アピノン（登録商標）−１０１（主成分：スルファミン酸グアニジン）は、分解温度が２３０℃と高い。従って、分解温度が所望の発泡温度よりも高いために発泡温度を低くする等の製造上の不具合が発生しないという利点がある。   Apinone (registered trademark) -101 (main component: guanidine sulfamate) has a high decomposition temperature of 230 ° C. Therefore, since the decomposition temperature is higher than the desired foaming temperature, there is an advantage that production defects such as lowering of the foaming temperature do not occur.

図６に示すように、アピノン（登録商標）−１０１の配合量（紙粉末成分と合成樹脂成分に対する配合量）が３．５ｗｔ％（質量パーセント濃度）、５．２ｗｔ％の各種発泡体について、吸音特性を測定したが、アピノン（登録商標）−１０１を配合しなかった場合と同様の吸音特性が得られた。これにより、アピノン（登録商標）−１０１は、吸音性能に影響を与えないことが確認された。   As shown in FIG. 6, various types of foams in which the blending amount of Apinon (registered trademark) -101 (the blending amount with respect to the paper powder component and the synthetic resin component) is 3.5 wt% (mass percent concentration), 5.2 wt%, The sound absorption characteristics were measured, and the same sound absorption characteristics as those obtained when no Apinon (registered trademark) -101 was blended were obtained. Thereby, it was confirmed that Apinon (registered trademark) -101 does not affect the sound absorption performance.

また、アピノン（登録商標）−１０１を難燃剤として配合した発泡体は、固有振動による吸音と位相速度による吸音とにより吸音特性（吸音ピーク性能）が得られるため、シンサレートと比較して、低周波数帯域及び高周波数帯域（ほぼ３０００Ｈｚ以下）で優れた吸音性能を発揮する。特に、アピノン（登録商標）−１０１の配合量（紙粉末成分と合成樹脂成分に対する配合量）が３．５ｗｔ％、５．２ｗｔ％の各発泡体は、難燃剤を配合しなかった発泡体と比較して、８００Ｈｚ〜２０００Ｈｚの範囲で優れた吸音性能が得られることが確認された。また、発泡体の密度が多孔質効果による吸音性能に密接な関係があることが確認された。密度が３４ｋｇ／ｍ３以上であれば、ほぼ３０００Ｈｚ以下の周波数帯域でシンサレートより十分に優れた吸音性が得られることが確認された。一方、密度が４１ｋｇ／ｍ３の発泡体は、作製しなかったが、リン酸アンモニウムの場合と同様の理由によって板厚不足となり、低い吸音性能しか得られないと考えられる。以上より、構造体の密度が３４ｋｇ／ｍ３〜４０ｋｇ／ｍ３の範囲とすることによって優れた吸音性能を発揮する発泡体が得られると考えられる。 In addition, a foam blended with Apinon (registered trademark) -101 as a flame retardant can achieve sound absorption characteristics (sound absorption peak performance) due to sound absorption due to natural vibration and sound absorption due to phase velocity. Excellent sound absorption performance in a band and a high frequency band (approximately 3000 Hz or less). In particular, each foam having a blending amount of Apinon (registered trademark) -101 (the blending amount with respect to the paper powder component and the synthetic resin component) of 3.5 wt% and 5.2 wt% is a foam having no flame retardant blended. In comparison, it was confirmed that excellent sound absorption performance was obtained in the range of 800 Hz to 2000 Hz. Moreover, it was confirmed that the density of the foam has a close relationship with the sound absorption performance due to the porous effect. It has been confirmed that if the density is 34 kg / m 3 or more, a sound-absorbing property sufficiently superior to the synthesizer can be obtained in a frequency band of approximately 3000 Hz or less. On the other hand, although a foam with a density of 41 kg / m 3 was not produced, it is considered that the sheet thickness is insufficient for the same reason as in the case of ammonium phosphate, and only low sound absorption performance is obtained. From the above, it is considered a foam density of the structure exhibits excellent sound absorption performance by a range of 34kg / m 3 ~40kg / m 3 is obtained.

図７は、アピノン−１０１の配合量と燃焼速度についての測定結果である。燃焼治具によって試験用発泡体を固定し、着火して燃え尽きる（完全炭化）までの燃焼時間を測定した。図７に示すように、アピノン−１０１の配合量がゼロ、１．５ｗｔ％パーセントの各発泡体は、目標燃焼速度８０ｍｍ／ｍｉｎより燃焼速度が速いことが確認された。一方、アピノン−１０１の配合量（紙粉末成分と合成樹脂成分に対する配合量）が３．５ｗｔ％、５．２ｗｔ％、７．９ｗｔ％、８．３ｗｔ％の各発泡体は、いずれも目標燃焼速度８０ｍｍ／ｍｉｎより燃焼速度が遅く、難燃性に優れていることが確認された。   FIG. 7 shows the measurement results of the amount of apinon-101 and the burning rate. The test foam was fixed with a combustion jig, and the combustion time until ignition and burning out (complete carbonization) was measured. As shown in FIG. 7, it was confirmed that the foams having a blending amount of apinon-101 of zero and 1.5 wt% percent each had a burning rate higher than the target burning rate of 80 mm / min. On the other hand, each of the foams in which the blending amount of apinon-101 (the blending amount with respect to the paper powder component and the synthetic resin component) is 3.5 wt%, 5.2 wt%, 7.9 wt%, and 8.3 wt% is the target combustion. It was confirmed that the burning speed was slower than the speed of 80 mm / min and the flame retardancy was excellent.

目標燃焼速度を８０ｍｍ／ｍｉｎとする場合、５．０ｗｔ％程度の配合量とすることで確実に目標とする難燃性を達成できる。   When the target burning rate is 80 mm / min, the target flame retardance can be reliably achieved by setting the blending amount to about 5.0 wt%.

以上より、紙を発泡材の一部とする発泡体からなるものにあって、合成樹脂成分としてポリプロピレン樹脂を使用し、グアニジン系難燃材のアピニン−１０１を５．０ｗｔ％程度配合し、構造体の密度が３４ｋｇ／ｍ３〜４０ｋｇ／ｍ３の範囲とすることによって優れた吸音性能を発揮する発泡体１Ａが得られる。 As mentioned above, it is made of a foam having paper as a part of a foam material, and a polypropylene resin is used as a synthetic resin component, and about 5.0 wt% of guanidine-based flame retardant apinin-101 is blended. foam 1A density of body exhibits excellent sound absorption performance by a range of 34kg / m 3 ~40kg / m 3 is obtained.

（他の難燃剤）
グアニジン系難燃剤として、アピノン（登録商標）−３０３（主成分：リン酸グアニジン）を使用しても良い。アピノン（登録商標）−１０１の分解点は２３０℃であるのに対し、アピノン（登録商標）−３０３の分解点は２６０℃と高いため、押し出し機内での発泡剤の加熱混練工程における高温の悪影響を確実に防止できる。 (Other flame retardants)
Apinone (registered trademark) -303 (main component: guanidine phosphate) may be used as a guanidine-based flame retardant. Since the decomposition point of Apinon (registered trademark) -101 is 230 ° C., the decomposition point of Apinon (registered trademark) -303 is as high as 260 ° C. Therefore, the adverse effect of high temperature in the heating and kneading process of the foaming agent in the extruder Can be reliably prevented.

発泡体に添加する難燃剤としては、水酸化マグネシウムは適していない。水酸化マグネシウムは、発泡時に、水酸化マグネシウムの微粒子が発泡核となり、細かな発泡が促進されて吸音に適した荒めの発泡にすることが困難である。これにより、最適な製品を作製することができなかった。   Magnesium hydroxide is not suitable as a flame retardant added to the foam. When magnesium hydroxide is foamed, the fine particles of magnesium hydroxide serve as foam nuclei, and fine foaming is promoted, making it difficult to make rough foam suitable for sound absorption. As a result, an optimum product could not be produced.

（他の実施形態）
図８及び図９は、他の実施形態を示す。発泡体１Ｂは、パルプ繊維成分である紙粉末成分と、合成樹脂成分と、補助剤としての澱粉成分であるコーンスターチと、水溶性で、且つ、パルプ繊維成分や澱粉成分内に浸透性のある難燃剤とを水蒸気発泡の発泡成分とし、多数の密閉された発泡セルＳ１，Ｓ２，Ｓ３より構成されている（図８参照）。紙粉末成分としては、官製葉書等の古紙を紙粉末繊維状にしたものを使用している。合成樹脂成分は、前記第１実施形態と同様である。難燃材は、前記第１実施形態と同様である。 (Other embodiments)
8 and 9 show another embodiment. The foam 1B is a paper powder component that is a pulp fiber component, a synthetic resin component, corn starch that is a starch component as an auxiliary agent, water-soluble, and is difficult to penetrate into the pulp fiber component and starch component. It is composed of a large number of sealed foam cells S1, S2 and S3, with the flame retardant as a foaming component of water vapor foaming (see FIG. 8). As the paper powder component, used paper such as government postcards made into paper powder fiber is used. The synthetic resin component is the same as in the first embodiment. The flame retardant is the same as in the first embodiment.

図８に示すように、発泡体１Ｂは、前記実施形態のものと比較して構造が相違する。つまり、発泡体１Ｂは、厚み方向に沿って、表面皮膜層２と発泡セル層３と仕切皮膜層４と発泡セル層３と表面皮膜層２とから構成されている。各表面皮膜層２は、極薄厚みであり、発泡セル層３より発泡密度が高い発泡セルＳ２が密集配置されている。各発泡セル層３は、仕切皮膜層４より発泡密度が低い発泡セルＳ３が密集配置されている。仕切皮膜層４は、発泡セル層３及び表面皮膜層２より発泡密度が高い発泡セルＳ１が密集配置されている。仕切皮膜層４は、２層の発泡セル層３の間を連続して仕切っている。仕切皮膜層４は、厚み方向の直交方向に一直線状で、且つ、ほぼ同じ厚みである。   As shown in FIG. 8, the structure of the foam 1B is different from that of the embodiment. That is, the foam 1 </ b> B includes the surface coating layer 2, the foam cell layer 3, the partition coating layer 4, the foam cell layer 3, and the surface coating layer 2 along the thickness direction. Each surface coating layer 2 has an extremely thin thickness, and foam cells S2 having a foam density higher than the foam cell layer 3 are densely arranged. In each foam cell layer 3, foam cells S3 having a foam density lower than that of the partition coating layer 4 are densely arranged. In the partition coating layer 4, the foam cells S <b> 1 having a higher foam density than the foam cell layer 3 and the surface coating layer 2 are densely arranged. The partition coat layer 4 continuously partitions between the two foam cell layers 3. The partition coat layer 4 is straight in the direction orthogonal to the thickness direction and has substantially the same thickness.

又、各発泡セル層３には、厚み方向の直交方向に沿って等間隔に複数の縦仕切皮膜層５が形成されている。各発泡セル層３は、縦仕切皮膜層５によって分割されている。縦仕切皮膜層５は、発泡セル層３より発泡密度が高い発泡セルＳ２が密集配置されている。   Each foamed cell layer 3 is formed with a plurality of vertical partition coating layers 5 at equal intervals along the direction perpendicular to the thickness direction. Each foam cell layer 3 is divided by a longitudinal partition coating layer 5. In the vertical partition coating layer 5, foam cells S <b> 2 having a foam density higher than that of the foam cell layer 3 are densely arranged.

次に、上記発泡体１Ｂを製造する押出し成形機１０を説明する。押出し成形機１０は、図９に示すように、前記実施形態のものと比較するに、口金部材１１に、水平方向（一方向）に等間隔Ｐを置いて配置された複数の吐出口１２、１３を上下２段有する。他の構成は、同一であるため、重複説明を省略する。図面の同一構成箇所には同一符号を付して明確化を図る。   Next, an extrusion molding machine 10 that manufactures the foam 1B will be described. As shown in FIG. 9, the extrusion molding machine 10 has a plurality of discharge ports 12 arranged at equal intervals P in the horizontal direction (one direction) on the base member 11 as compared with the one of the above embodiment. 13 has two upper and lower stages. Since other configurations are the same, redundant description is omitted. The same components in the drawings are given the same reference numerals for clarification.

この発泡体１Ｂでも、前記実施形態と同様の理由によって優れた吸音特性と難燃性を発揮する。   This foam 1B also exhibits excellent sound absorption characteristics and flame retardancy for the same reason as in the above embodiment.

その上、発泡体１Ｂは、厚み方向の中間位置に、厚み方向の直交方向に沿って延びる仕切皮膜層４を有する。これにより、発泡体１Ｂの発泡セル層３内を伝搬する振動が仕切皮膜層４に達すると、仕切皮膜層４でランダムな振動が平面振動にリセットされ、その後、更に発泡セル層３内を伝搬することになるため、仕切皮膜層４で振動吸収が促進され、更に優れた吸音特性を発揮すると考えられる。   In addition, the foam 1 </ b> B has a partition coating layer 4 extending along the direction perpendicular to the thickness direction at an intermediate position in the thickness direction. As a result, when the vibration propagating in the foam cell layer 3 of the foam 1B reaches the partition coating layer 4, the random vibration is reset to the plane vibration in the partition coating layer 4, and then further propagates in the foam cell layer 3. Therefore, it is considered that vibration absorption is promoted by the partition coating layer 4 and further excellent sound absorption characteristics are exhibited.

（その他）
この他の実施形態の発泡体１Ｂは、仕切皮膜層４を１箇所に有するが、仕切皮膜層４を２箇所以上に有するものであっても良い。仕切皮膜層４は、多ければ多いほど吸音特性の向上になる。 (Other)
The foam 1B of this other embodiment has the partition coating layer 4 at one location, but may have the partition coating layer 4 at two or more locations. The more the partition coating layer 4 is, the better the sound absorption characteristics.

１Ａ，１Ｂ 発泡体
Ｓ１，Ｓ２，Ｓ３ 発泡セル
２ 表面皮膜層
３ 発泡セル層
１０ 押出し成形機
１２，１３ 吐出口 1A, 1B Foam S1, S2, S3 Foamed cell 2 Surface coating layer 3 Foamed cell layer 10 Extruder 12, 13 Discharge port

Claims (7)

パルプ繊維成分と、合成樹脂成分と、補助剤としての澱粉成分と、水溶性で、且つ、パルプ繊維成分や澱粉成分内に浸透性のある難燃剤とを水蒸気発泡の発泡成分とし、多数の空間を形成した発泡セルより構成されたことを特徴とする発泡体。   A pulp fiber component, a synthetic resin component, a starch component as an auxiliary agent, a water-soluble flame retardant that is permeable to the pulp fiber component and the starch component are used as a foaming component for steam foaming, and a large number of spaces. A foam characterized in that it is composed of a foamed cell in which is formed. 請求項１記載の発泡体であって、
難燃剤は、リン系難燃剤であることを特徴とする発泡体。 The foam according to claim 1,
A foam characterized in that the flame retardant is a phosphorus flame retardant. 請求項２記載の発泡体であって、
リン系難燃剤は、リン酸アンモニウムであることを特徴とする発泡体。 The foam according to claim 2,
A foam characterized in that the phosphorus-based flame retardant is ammonium phosphate. 請求項１記載の発泡体であって、
難燃剤は、グアニジン系難燃剤であることを特徴とする発泡体。 The foam according to claim 1,
A foam characterized in that the flame retardant is a guanidine flame retardant. 請求項４記載の発泡体であって、
グアニジン系難燃剤は、アピノン（登録商標）−１０１であることを特徴とする発泡体。 The foam according to claim 4,
The foam characterized in that the guanidine-based flame retardant is Apinon (registered trademark) -101. 請求項４記載の発泡体であって、
グアニジン系難燃剤は、アピノン（登録商標）−３０３であることを特徴とする発泡体。 The foam according to claim 4,
A foam characterized in that the guanidine-based flame retardant is Apinon (registered trademark) -303. 請求項１〜請求項６のいずれかに記載の発泡体であって、
構造体の密度は、３５ｋｇ／ｍ３〜４０ｋｇ／ｍ３の範囲であることを特徴とする発泡体。 The foam according to any one of claims 1 to 6,
The density of the structure, the foam, which is a range of 35kg / m 3 ~40kg / m 3 .
JP2013145303A 2013-07-11 2013-07-11 Foam Abandoned JP2015017188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013145303A JP2015017188A (en) 2013-07-11 2013-07-11 Foam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013145303A JP2015017188A (en) 2013-07-11 2013-07-11 Foam

Publications (1)

Publication Number Publication Date
JP2015017188A true JP2015017188A (en) 2015-01-29

Family

ID=52438490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013145303A Abandoned JP2015017188A (en) 2013-07-11 2013-07-11 Foam

Country Status (1)

Country Link
JP (1) JP2015017188A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016204452A (en) * 2015-04-17 2016-12-08 矢崎総業株式会社 Foam body
JP2016204451A (en) * 2015-04-17 2016-12-08 矢崎総業株式会社 Foam body
WO2018110691A1 (en) * 2016-12-16 2018-06-21 パナソニック株式会社 Fire-resistant foam and production method for fire-resistant foam
CN116063730A (en) * 2023-02-22 2023-05-05 国际竹藤中心 Natural flame-retardant bamboo pulp foam material and preparation method and application thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003335887A (en) * 2002-05-21 2003-11-28 Misawa Homes Co Ltd Foam, heat-insulating material and cushioning material
JP2008005857A (en) * 2006-06-27 2008-01-17 Kankyo Keiei Sogo Kenkyusho:Kk Chair
US20100227149A1 (en) * 2009-03-09 2010-09-09 Ki-Nam Koo Microfoam and its manufacturing method
JP2012255167A (en) * 2007-06-20 2012-12-27 Nankyo Efunika Kk Flame retardancy powder composition, flame-retardant resin composition, flame-retardant resin molding, and flame-retardant resin expansion molding body
JP2013071435A (en) * 2011-09-29 2013-04-22 Yazaki Corp Foam, method of manufacturing foam, and extruder for foam
JP2013170207A (en) * 2012-02-21 2013-09-02 Mitsubishi Paper Mills Ltd Flame retardant-used self-extinguishing steam-expanded material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003335887A (en) * 2002-05-21 2003-11-28 Misawa Homes Co Ltd Foam, heat-insulating material and cushioning material
JP2008005857A (en) * 2006-06-27 2008-01-17 Kankyo Keiei Sogo Kenkyusho:Kk Chair
JP2012255167A (en) * 2007-06-20 2012-12-27 Nankyo Efunika Kk Flame retardancy powder composition, flame-retardant resin composition, flame-retardant resin molding, and flame-retardant resin expansion molding body
US20100227149A1 (en) * 2009-03-09 2010-09-09 Ki-Nam Koo Microfoam and its manufacturing method
JP2013071435A (en) * 2011-09-29 2013-04-22 Yazaki Corp Foam, method of manufacturing foam, and extruder for foam
JP2013170207A (en) * 2012-02-21 2013-09-02 Mitsubishi Paper Mills Ltd Flame retardant-used self-extinguishing steam-expanded material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016204452A (en) * 2015-04-17 2016-12-08 矢崎総業株式会社 Foam body
JP2016204451A (en) * 2015-04-17 2016-12-08 矢崎総業株式会社 Foam body
WO2018110691A1 (en) * 2016-12-16 2018-06-21 パナソニック株式会社 Fire-resistant foam and production method for fire-resistant foam
JPWO2018110691A1 (en) * 2016-12-16 2019-10-24 パナソニック株式会社 Flame retardant foam and method for producing flame retardant foam
US11299597B2 (en) 2016-12-16 2022-04-12 Eco Research Institute Ltd. Flame retardant foam and manufacturing method of flame retardant foam
CN116063730A (en) * 2023-02-22 2023-05-05 国际竹藤中心 Natural flame-retardant bamboo pulp foam material and preparation method and application thereof
CN116063730B (en) * 2023-02-22 2023-08-11 国际竹藤中心 Natural flame-retardant bamboo pulp foam material and preparation method and application thereof

Similar Documents

Publication Publication Date Title
CN103910854B (en) Fire-retardant semi-hard polyurethane foam of a kind of low density and preparation method thereof
KR101574380B1 (en) Interior sound absorption sheet and sound absorption type soundproofing panel including the same
JP2015017188A (en) Foam
Feng et al. Gradient structured micro/nanofibrous sponges with superior compressibility and stretchability for broadband sound absorption
CN109219845B (en) Sound insulation material
WO2018147464A1 (en) Resin foamed particles, resin foam molded body, and laminated body
JP2018171829A (en) Laminate
JP6084819B2 (en) Foam and foam manufacturing method
TWI534007B (en) Sound absorption sheet improving acoustic absorption and the method for manufacturing the same
JP2014004731A (en) Acoustic material and method for producing acoustic material
JP5902565B2 (en) Sound absorbing material and method for producing sound absorbing material
JP2019107856A (en) Laminate using foam molded body and sound absorber
JP2007113158A (en) Heat-resistant nonwoven fabric
KR101915811B1 (en) Nonwoven fabric having good sound-absorbing
JP6084818B2 (en) Foam and foam manufacturing method
Akiwate et al. Acoustic characterization of additive manufactured layered porous materials
JP6092605B2 (en) Sound absorbing material and door structure of automobile using this sound absorbing material
KR101875927B1 (en) Nonwoven fabric having good sound-absorbing
KR102071784B1 (en) Porous flame retardant PET plate manufacturing method and sound absorbing material the same
JP2016204452A (en) Foam body
JP2014098076A (en) Foam and method for manufacturing foam
KR200371495Y1 (en) Sound absorbing board treated with a environmet-friendly fire retardant
JP2016132842A (en) Nonwoven fabric, manufacturing method of nonwoven fabric and fiber reinforced plastic molded body
JP2007107108A (en) Flame-retardant nonwoven fabric
JP2019155642A (en) Laminate and sound absorber using the same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160617

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170313

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170425

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20170530

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170725

A762 Written abandonment of application

Free format text: JAPANESE INTERMEDIATE CODE: A762

Effective date: 20170825