JP2016504209A - 高耐熱吸遮音材の成形方法 - Google Patents
高耐熱吸遮音材の成形方法 Download PDFInfo
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- JP2016504209A JP2016504209A JP2015541683A JP2015541683A JP2016504209A JP 2016504209 A JP2016504209 A JP 2016504209A JP 2015541683 A JP2015541683 A JP 2015541683A JP 2015541683 A JP2015541683 A JP 2015541683A JP 2016504209 A JP2016504209 A JP 2016504209A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/60—Releasing, lubricating or separating agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/10—Applying counter-pressure during expanding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1266—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being completely encapsulated, e.g. for packaging purposes or as reinforcement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
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Abstract
Description
製造例1.エポキシ樹脂に含浸されたアラミド積層の吸音素材
メタ系アラミド(m−Aramid)繊維67重量部及びエポキシ系熱硬化性バインダー樹脂33重量部からなる面密度450g/m2の吸音素材の一面にエポキシ系熱硬化性バインダー樹脂30g/m2をスプレー処理し、メタ系アラミド(m−Aramid)繊維67重量部及びエポキシ系熱硬化性バインダー樹脂33重量部からなる面密度450g/m2のまた他の吸音素材の一面を積層して吸音素材を製造した。
限界酸素指数(LOI)が40%、耐熱温度が300℃、繊度が2デニール、長さが51mmのメタ系アラミド短繊維をエアーブローイング(Air Blowing)で打綿し、カーディングを用いて30g/m2のウェブを形成した。形成されたウェブを水平ラッパーを用いて5m/minの生産速度でコンベアベルト上に10重オーバーラッピング積層して積層ウェブを形成した。積層ウェブは、ニードルのストローク数が150回/m2となるようにする条件でアップ−ダウンニードリング、ダウン−アップニードリング及びアップ−ダウンニードリングを連続的に行って密度300g/m2及び厚さ6mmのアラミド不織布を製造した。
前記製造例2の方法で製造されたアラミド不織布をバインダー溶液に1dip 1nip(Pick−up300%)で含浸した。この際、バインダー溶液は、ビスフェノールAジグリシジルエーテル8重量%、ビスフェノールAジグリシジルエーテルポリマー2重量%、ジシアンジアミド0.2重量%、ジメチルウレア0.02重量%、メラミンシアヌレート10重量%、ジメチルカーボネイト79.78重量%の組成を有する。前記バインダー溶液を入れた浴槽にアラミド不織布を含浸した後、マングルローラーの圧力を8kgf/cm2に維持して圧着することで、1,500g/m2のバインダー含浸不織布を製造した。バインダー含浸不織布を150℃で乾燥してバインダーが300g/m2残るように有機溶媒を除去した。その結果、600g/m2の熱硬化性フェルトを製造した。
前記製造例2の方法で製造されたアラミド不織布の表面にエポキシ樹脂のコーティング量が不織布100重量部を基準としてバインダーの含量が50重量部となるようにコーティングして150℃で乾燥した。
前記製造例2の方法で製造されたアラミド不織布を熱可塑性バインダー樹脂溶液に含浸することで、熱可塑性樹脂に含浸されたアラミド不織布を製造した。
前記製造例3と同様のニードルパンチング工程で密度300g/m2及び厚さ6mmのポリエチレンテレフタレート(PET)不織布を製造し、バインダー溶液に含浸することで、エポキシ樹脂に含浸されたPET不織布を製造した。
実施例1
熱間金型の表面に、水にシリコン系エマルジョンが33%濃度で希釈されたスプレーアップ形態の離型剤を熱間金型の内部の上下面にそれぞれ60g/m2の量を均一に塗布し、前記製造例1で製造した吸音素材を熱間金型の表面温度が195□5℃に維持する条件で150kgf/cm2の圧力で200秒間圧着することで、熱間圧着成形して形状を固定し、圧着治具に締結された冷間金型の表面温度を30℃に維持する条件で60秒間冷間圧着して形状を安定化して高耐熱吸遮音材を成形した。
前記実施例1と同様に行うが、吸音素材は、前記製造例2から6で用意した吸音素材をそれぞれ使用した。
前記実施例1と同様に行うが、離型剤を熱間金型の内部の上下面にそれぞれ20g/m2未満で塗布して高耐熱吸遮音材を成形した。
前記実施例1と同様に行うが、離型剤を熱間金型の内部の上下面にそれぞれ100g/m2を超えて塗布して高耐熱吸遮音材を成形した。
前記実施例1と同様に行うが、熱間金型の表面温度が150℃未満に維持される条件で高耐熱吸遮音材を成形した。
前記実施例1と同様に行うが、熱間金型の表面温度が230℃を超える条件で高耐熱吸遮音材を成形した。
<吸遮音材の物性評価方法>
吸遮音材の物性は下記の方法で測定して比較した。
1.耐熱性の評価
吸遮音材の耐熱性を評価するために、耐熱オーブンで260℃の温度条件で300時間老化させ、標準状態(温度23±2℃、 相対湿度50±5%)で1時間以上そのまま維持した後、外観及び引張強度を測定した。この際、外観に収縮及び変形、表面のはがれ、毛羽立ち、亀裂などがあるか否かを肉眼で確認して判別した。引張試験は、ダンベル状1号試験片を任意に5枚取って標準状態で引張速度200mm/分の条件で施した。
吸遮音材の耐久性は熱サイクル試験法によって評価した。下記の条件を1サイクルとして5サイクルを施して耐久性を判断した。
1)1サイクル条件
室温→高温(150℃×3時間)→室温→低温(−30℃×3時間)→室温→耐湿(50℃×95%RH)
2)耐久性の評価基準
熱サイクルの試験後、外観に変化があるか否かを確認した。例えば、表面損傷、膨張、破砕、変色の程度などを確認し、これら外観に変化がない場合は「異常なし」と表記した。
吸遮音材の難燃性はISO 3795燃焼性の試験方法で測定した。
吸遮音材の不燃性はUL94垂直難燃性の試験方法で測定した。
吸遮音材の吸音性はISO354の方法で測定した。
1)評価方法
フラジール(FRAZIER)形試験機を用いて試験片を装着し、垂直に通過して流れる空気の量を測定した。空気が試験片を通過する面積は5cm2で、この際、加えられた圧力は125パスカル(Pa)に調整した。
本実験例1では吸音素材に用いられる耐熱繊維の原糸の選択によって製造された吸遮音材の物性を比較した。具体的には、吸音素材は、前記製造例3の方法で製造されたエポキシ樹脂に含浸された不織布を使用するが、ニードルパンチング段階で用いられる原糸は、繊度が2デニールで、長さ51mmの下記表5に示す原糸を用いた。そして、前記実施例1の方法で吸遮音材を成形した。
本実験例2では、不織布の密度による吸遮音材の物性を比較した。具体的には、前記製造例3の方法でエポキシ樹脂に含浸された不織布を製造して吸音素材として使用するが、ニードルパンチング段階で製造した不織布の密度を異なるようにした。そして、それぞれの吸音素材を用いて前記実施例1の方法で吸遮音材を成形した。製造した吸遮音材の吸音性能は図5に示す。
本実験例3では、吸音素材を製造する時、耐熱繊維からなる不織布に適用される熱硬化性バインダー樹脂の適用方式による吸遮音材の吸音特性を比較した。
本実験例4では、実施例2(吸音素材としてアラミド不織布を使用)及び実施例3(吸音素材として熱硬化性バインダー樹脂に含浸されたアラミド不織布を使用)で製造された吸遮音材のそれぞれに対して遮熱性能を評価した。具体的には、25mm厚さの吸遮音材をそれぞれ設け、吸遮音材の片面に1000℃の熱を5分間加えた後、吸遮音材の反対側面で温度を測定した。
本実験例5では、前記実施例2の吸遮音材と既存のアルミニウム遮熱板に対する遮熱性能を比較した。具体的には、用意されている吸遮音材と遮熱板の片面に同じ熱を加えて熱源方向の温度が250℃になるようにした。次に、加熱時間帯ごとに吸遮音材の反対側面で温度を測定した。その結果は図6に示す。
前記製造例2の方法で吸音素材を製造するが、エポキシ樹脂溶液に含浸されたアラミド不織布を乾燥して最終的に含まれている熱硬化性バインダー樹脂の含量を調整した。この際、熱硬化性バインダー樹脂の含量は、乾燥した不織布100重量部を基準として吸遮音材に含まれているバインダーの重量部として示す。
前記製造例3の方法でアラミド不織布100重量部を基準としてバインダーが50重量部含浸された吸音素材を製造するが、前記バインダーとして下記表9に示す樹脂を用いた。
下記表9には、バインダーの種類を異なるようにして製造した吸遮音材に対する機械的物性と吸音率を比較した結果を示す。
Claims (18)
- i)離型剤を熱間金型の内部に塗布する離型剤塗布段階と、
ii)限界酸素指数(LOI)が25%以上で、耐熱温度が200℃以上の繊維素材20〜80重量部及び耐熱温度が200℃以上の熱硬化性バインダー樹脂20〜80重量部からなる吸音素材を前記離型剤が塗布された熱間金型に装着して形状を固定する熱間圧着成形段階と、
iii)前記熱間圧着成形段階で圧着された吸音素材の形状を安定化する冷間圧着段階と、
を含むことを特徴とする高耐熱吸遮音材の成形方法。 - 前記i)離型剤塗布段階は、水にエマルジョンを10〜90%濃度で希釈したスプレーアップ形態の離型剤を熱間金型の内部の上下面にそれぞれ20〜100g/m2の量を塗布してなることを特徴とする請求項1に記載の高耐熱吸遮音材の成形方法。
- 前記エマルジョンは、シリコン系及びフッ素系からなる群より選択された1つ以上であることを特徴とする請求項2に記載の高耐熱吸遮音材の成形方法。
- 前記ii)熱間圧着成形段階は、吸音素材を熱間プレスに締結された熱間金型に装着し、150〜230℃で熱間金型の表面温度を維持した状態で60〜200kgf/cm2の圧力で60〜300秒の熱間圧着時間を維持して形状を固定することを特徴とする請求項1に記載の高耐熱吸遮音材の成形方法。
- 前記吸音素材は、繊維素材を含む不織布と、前記不織布と同じ層に位置して不織布内部の3次元形状を維持する形態で含浸されている熱硬化性バインダー樹脂と、を含んでおり、前記不織布の繊維原糸の表面に熱硬化性バインダー樹脂が全体的に均一に分布して付着したまま存在しており、バインダーが含浸される前の不織布に比べて、さらに微細な大きさを有する通気孔を形成することを特徴とする請求項1に記載の高耐熱吸遮音材の成形方法。
- 前記吸音素材は、不織布を熱硬化性バインダー樹脂溶液に含浸した後、1〜20kgf/cm2の圧力で圧着して70〜200℃の温度で乾燥して製造されることを特徴とする請求項5に記載の高耐熱吸遮音材の成形方法。
- 前記吸音素材は、不織布100重量部を基準として熱硬化性バインダー樹脂が1〜300重量部含浸されることを特徴とする請求項6に記載の高耐熱吸遮音材の製造方法。
- 前記繊維素材は、アラミド繊維、ポリフェニレンスルフィド(PPS)繊維、酸化されたポリアクリロニトリル(OXI−PAN)繊維、ポリイミド(PI)繊維、ポリベンズイミダゾール(PBI)繊維、ポリベンズオキサゾール(PBO)繊維、ポリテトラフルオロエチレン(PTFE)繊維、ポリケトン(PK)繊維、金属繊維、炭素繊維、ガラス繊維、玄武岩繊維、シリカ繊維、及びセラミック繊維より選択された1種以上であることを特徴とする請求項5に記載の高耐熱吸遮音材の成形方法。
- 前記繊維素材は、メタ系アラミド(m−Aramid)繊維及びパラ系アラミド(p−Aramid)繊維からなる群より選択された1つ以上であることを特徴とする請求項8に記載の高耐熱吸遮音材の成形方法。
- 前記不織布は、繊度が1〜15デニールのアラミド繊維からなり、厚さが3〜20mmの単一層の不織布であることを特徴とする請求項5に記載の高耐熱吸遮音材の成形方法。
- 前記不織布は、密度が100〜2000g/m2であることを特徴とする請求項5に記載の高耐熱吸遮音材の成形方法。
- 前記熱硬化性バインダー樹脂は、エポキシ樹脂、エポキシ樹脂1〜20重量%の硬化剤、エポキシ樹脂1〜10重量%の触媒、及びエポキシ樹脂10〜40重量%の難燃剤からなることを特徴とする請求項1に記載の高耐熱吸遮音材の成形方法。
- 前記エポキシ樹脂は、ビスフェノールAジグリシジルエーテル(bisphenol A diglycidyl ether)、ビスフェノールFジグリシジルエーテル(bisphenol F diglycidyl ether)、ポリオキシプロピレンジグリシジルエーテル(polyoxypropylene diglycidyl ether)、ホスファゼンジグリシジルエーテル(phosphazene diglycidyl ether)、フェノールノボラックエポキシ(phenol novolac epoxy)、オルソクレゾールノボラックエポキシ(o−cresol novolac epoxy)、及びビスフェノールAノボラックエポキシ(bisphenol A−novolac epoxy)からなる群より選択された1つ以上を含むことを特徴とする請求項12に記載の高耐熱吸遮音材の成形方法。
- 前記iii)冷間圧着段階は、冷間プレス及び圧着治具からなる群より選択された1つに締結された冷間金型に装着し、20〜40℃で冷間金型の表面温度を維持した状態で5秒以上の冷間圧着時間を維持する工程からなることを特徴とする請求項1に記載の高耐熱吸遮音材の成形方法。
- 前記iii)冷間圧着段階は、30〜60秒の冷間圧着時間を維持する工程からなることを特徴とする請求項1に記載の高耐熱吸遮音材の成形方法。
- i)騒音を誘発する装置の立体構造を確認する段階と、
ii)前記装置の立体構造と一部または全部が一致するように請求項1から15より選択された一項の方法で吸遮音材を成形する段階と、
iii)前記吸遮音材を前記騒音誘発装置に隣接させる段階と、
を含むことを特徴とする騒音誘発装置の騒音低減方法。 - 前記装置は、モータ、エンジンまたは排気系であることを特徴とする請求項16に記載の騒音誘発装置の騒音低減方法。
- 前記隣接は、騒音誘発装置に密着して締結するか、または騒音誘発装置から一定の距離をおいて設置するか、または騒音誘発装置に適用される部品を成形して適用することを特徴とする請求項16に記載の騒音誘発装置の騒音低減方法。
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Also Published As
Publication number | Publication date |
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CN105142869A (zh) | 2015-12-09 |
MX2015005746A (es) | 2015-09-16 |
BR112015010325B1 (pt) | 2021-06-15 |
KR101428422B1 (ko) | 2014-08-08 |
RU2015121631A (ru) | 2016-12-27 |
CN105142869B (zh) | 2019-06-14 |
RU2654021C2 (ru) | 2018-05-15 |
US20150352758A1 (en) | 2015-12-10 |
EP2926966A4 (en) | 2016-08-17 |
IN2015DN03907A (ja) | 2015-10-02 |
BR112015010325A2 (pt) | 2017-07-11 |
WO2014073859A1 (ko) | 2014-05-15 |
KR20140059142A (ko) | 2014-05-15 |
EP2926966A1 (en) | 2015-10-07 |
US20150266214A1 (en) | 2015-09-24 |
US9492955B2 (en) | 2016-11-15 |
JP6199405B2 (ja) | 2017-09-20 |
US9498904B2 (en) | 2016-11-22 |
EP2926966B1 (en) | 2018-01-10 |
CA2890349A1 (en) | 2014-05-15 |
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