JP5014070B2 - マット材および排気ガス処理装置 - Google Patents
マット材および排気ガス処理装置 Download PDFInfo
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- JP5014070B2 JP5014070B2 JP2007288831A JP2007288831A JP5014070B2 JP 5014070 B2 JP5014070 B2 JP 5014070B2 JP 2007288831 A JP2007288831 A JP 2007288831A JP 2007288831 A JP2007288831 A JP 2007288831A JP 5014070 B2 JP5014070 B2 JP 5014070B2
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Description
(1)通常、樹脂フィルムは、伸縮性を有している。従って、樹脂フィルムが表裏面に設置されたマット材を排気ガス処理体に巻き回そうとして、マット材の長手方向に張力を負荷した場合、その力に相関した抵抗力(復元力)が生じる。この抵抗力のため、マット材の巻き付け性(巻き付け易さ)が低下する。
(2)通常、保持シール材を排気ガス処理体に巻き回した場合、保持シール材の厚さに起因して、保持シール材の外周と内周の間には周長差が生じる。しかしながら、樹脂フィルムが表裏面に設置されたマット材では、張力負荷時に外周側と内周側に一様な伸びが生じ易くなるため、マット材全体で、そのような周長差を緩和することは難しい。従って、巻き付け後のマット材において、嵌合部(マット材の巻回方向における第1の端面と第2の端面の合わせ部)が必要以上に重なったり、逆に十分な嵌合ができなくなるという問題が生じ得る。すなわち、高い位置合わせ精度で保持シール材の嵌合部を形成することは難しい。
前記第1のシート材および第2のシート材は、同じ引張荷重で比較した場合、当該マット材の長手方向における伸び量がそれぞれ異なることを特徴とするマット材が提供される。
前記第1および第2のシート材は、それぞれの面内で伸び異方性を有し、
シート材の面内において、(引張荷重(N)/公称歪み)で表される値(5%公称歪みでの値)が、最小となる方向を易伸び方向とし、最大となる方向を難伸び方向としたとき、
前記第1のシート材は、前記易伸び方向と前記難伸び方向の成す角度がθdA(0<θdA≦90゜)であり、前記第2のシート材は、前記易伸び方向と前記難伸び方向の成す角度がθdB(0<θdB≦90゜)であり、
当該マット材の長手方向に対して、前記第1のシート材の易伸び方向がなす角度θA(0≦θA≦θdA)と、当該マット材の長手方向に対して、前記第2のシート材の易伸び方向がなす角度θB(0≦θB≦θdB)との間には、θA/θdA<θB/θdBの関係が成立することを特徴とするマット材が提供される。
排気ガスの流通する2つの開口面を有する排気ガス処理体と、
前記排気ガス処理体の開口面を除く外周面の少なくとも一部に巻き回して使用される保持シール材と、
該保持シール材が巻き回された前記排気ガス処理体を収容する筒状部材と、
で構成される排気ガス処理装置であって、
前記保持シール材は、無機繊維を含み、第1および第2の表面に、それぞれ、第1および第2のシート材が設置されたマット材で構成され、
前記第1および第2のシート材は、それぞれの面内で伸び異方性を有し、
シート材の面内において、(引張荷重(N)/公称歪み)で表される値(5%公称歪みでの値)が、最小となる方向を易伸び方向とし、最大となる方向を難伸び方向としたとき、
前記第1のシート材は、前記易伸び方向と前記難伸び方向の成す角度がθdA(0<θdA≦90゜)であり、前記第2のシート材は、前記易伸び方向と前記難伸び方向の成す角度がθdB(0<θdB≦90゜)であり、
前記保持シール材の巻回方向に対して、前記第1のシート材の易伸び方向がなす角度θA(0≦θA≦θdA)と、前記保持シール材の巻回方向に対して、前記第2のシート材の易伸び方向がなす角度θB(0≦θB≦θdB)との間には、θA/θdA<θB/θdBの関係が成立し、
前記保持シール材は、前記第2の表面が前記排気ガス処理体の外周面と接触するようにして、前記排気ガス処理体に巻き回されることを特徴とする排気ガス処理装置が提供される。
(1)通常、シート材に使用される樹脂フィルムは、全方向に対して均一な伸縮性を有する。また、そのようなシート材が表裏面に設置されたマット材を排気ガス処理体に巻き回そうとして、マット材の巻回方向に張力を負荷した場合、反対方向に、その力に対する抵抗力(復元力)が生じる。この抵抗力の影響により、両面にシート材を有するマット材では、シート材を有さないマット材に比べて、マット材の巻き付け性(巻き付け易さ)が低下する。
(2)通常、マット材を排気ガス処理体に巻き回した場合、マット材の厚さに起因して、マット材の外周面と内周面の間には周長差が生じる。しかしながら、従来のシート材が表裏面に設置されたマット材では、張力負荷時に外周側と内周側に、比較的均一な伸びが生じ易くなるため、マット材全体で、そのような周長差を緩和することは難しい。従って、巻き付け後のマット材において、嵌合凸部50と嵌合凹部60の嵌合部が必要以上に重なったり、逆に十分な嵌合ができなくなるという問題が生じ得る。従って、全方向に対して均一な伸縮性を有するシート材を両面に有する従来のマット材では、高い精度で嵌合部を形成することは難しい。
θdif=(θB/θdB)−(θA/θdA) (1)
θdifは、0.25<θdif≦1の範囲にあることが好ましい。この場合、後述のように、マット材の嵌合部での嵌合精度がより一層高まり、信頼性の高い排気ガス処理装置を得ることができる。特に、0.5≦θdif≦1の範囲にあることがより好ましい。
(実施例1に係るマット材の作製)
まず、アルミニウム含有量70g/l、Al/Cl=1.8(原子比)の塩基性塩化アルミニウム水溶液に、アルミナ系繊維の組成がAl2O3:SiO2=72:28となるように、シリカゾルを配合し、アルミナ系繊維の前駆体を形成した。次に、アルミナ系繊維の前駆体に、ポリビニルアルコールを添加した。さらに、この液を濃縮して紡糸液とし、この紡糸液を用いてブローイング紡糸処理で紡糸した。搬送キャリアガス(空気)流量は、52m/sであり、紡糸液の供給速度は、5.3ml/hである。
(実施例2〜5)
実施例1と同様の方法により、両表面に伸び異方性シート材を有するマット材を製作した(実施例2〜5)。ただし実施例2では、図9に示すように、θA=0゜、θB=90゜とし、実施例3では、図10に示すように、θA=22.5゜、θB=45゜とし、実施例4では、θA=22.5゜、θB=90゜とし、実施例5では、θA=45゜、θB=90゜とした。
(実施例6)
実施例1と同様の方法により、両表面に伸び異方性シート材を有するマット材を製作した。ただし実施例6では、第1および第2のシート材として、厚さが0.080mmでθd=45゜のシート材(ポリエチレン製:ワリフ(登録商標)、新日石プラスト(株)社製)を使用した。また、これらのシート材は、150℃で1分間、約15kPaの加圧下で加熱することにより、マット基部の第1および第2の表面に熱溶着させた。なお、θA=0゜、θB=22.5゜とした。
(実施例7〜10)
実施例6と同様の方法により、両表面に伸び異方性シート材を有するマット材を製作した(実施例7〜10)。ただし実施例7では、θA=0゜、θB=45゜とし、実施例8では、θA=15゜、θB=22.5゜とし、実施例9では、θA=15゜、θB=45゜とし、実施例10では、θA=22.5゜、θB=45゜とした。
(比較例1)
実施例1と同様の方法により、マット材を製作した。ただし、比較例1では、マット基部の第1および第2の表面に、厚さが0.026mmで、伸び異方性を有さない(すなわち等方性の)樹脂フィルム(パナック(株)社製)を設置した。この樹脂フィルムは、160℃で1分間、約15kPaの加圧下で、マット材の両表面に熱溶着させた。
(比較例2〜7)
実施例1と同様の方法により、両表面に伸び異方性シート材を有するマット材を製作した(比較例2〜8)。ただし比較例2では、θA=0゜、θB=0゜とし、比較例3では、θA=45゜、θB=0゜とし、比較例4では、θA=45゜、θB=45゜とし、比較例5では、θA=90゜、θB=0゜とし、比較例6では、θA=90゜、θB=45゜とし、比較例7では、θA=90゜、θB=90゜とした。
(嵌合部隙間測定)
前述の方法で作製した各マット材を用いて、以下の嵌合部隙間測定を実施した。
(試験結果)
各サンプルにおいて得られた曲げ試験結果(最大荷重の値)および嵌合部隙間測定(標準偏差)の結果を表1に示す。
4 排気管
10 排気ガス処理装置
12 ケーシング
20 排気ガス処理体
24 保持シール材
30 マット材
50 嵌合凸部
60 嵌合凹部
210 第1の表面
260 第2の表面
310 第1のシート材
340 マット基部
360 第2のシート材。
Claims (11)
- 無機繊維を含み、第1および第2の表面に、それぞれ、第1および第2のシート材が設置されたマット材であって、
前記第1および第2のシート材は、それぞれの面内で伸び異方性を有し、
シート材の面内において、(引張荷重(N)/公称歪み)で表される値(5%公称歪みでの値)が、最小となる方向を易伸び方向とし、最大となる方向を難伸び方向としたとき、
前記第1のシート材は、前記易伸び方向と前記難伸び方向の成す角度がθdA(0<θdA≦90゜)であり、前記第2のシート材は、前記易伸び方向と前記難伸び方向の成す角度がθdB(0<θdB≦90゜)であり、
当該マット材の長手方向に対して、前記第1のシート材の易伸び方向がなす角度θA(0≦θA≦θdA)と、当該マット材の長手方向に対して、前記第2のシート材の易伸び方向がなす角度θB(0≦θB≦θdB)との間には、θA/θdA<θB/θdBの関係が成立することを特徴とするマット材。 - θdif=(θB/θdB)−(θA/θdA)で表される規格化された角度差θdifが、0.25<θdif≦1の範囲にあることを特徴とする請求項1に記載のマット材。
- 実質的にθA=0(ゼロ)であることを特徴とする請求項1または2に記載のマット材。
- 前記第1のシート材は、θdA=90゜またはθdA=45゜であることを特徴とする請求項1乃至3のいずれか一つに記載のマット材。
- 実質的にθdA=θdBであることを特徴とする請求項1乃至4のいずれか一つに記載のマット材。
- 前記第1のシート材と前記第2のシート材は、同一のシート材であることを特徴とする請求項1乃至5のいずれか一つに記載のマット材。
- 前記第1および/または前記第2のシート材は、実質的に、前記マット材の第1および/または第2の表面の全面に設置されていることを特徴とする請求項1乃至6のいずれか一つに記載のマット材。
- 前記第1および/または前記第2のシート材は、ポリエチレン、ポリプロピレン、ポリエチレンテレフタレート、およびこれらの混合物からなる群から選定された材料で構成されていることを特徴とする請求項1乃至7のいずれか一つに記載のマット材。
- さらに、無機結合材および/または有機結合材を有することを特徴とする請求項1乃至8のいずれか一つに記載のマット材。
- 排気ガスの流通する2つの開口面を有する排気ガス処理体と、
前記排気ガス処理体の開口面を除く外周面の少なくとも一部に巻き回して使用される保持シール材と、
該保持シール材が巻き回された前記排気ガス処理体を収容する筒状部材と、
で構成される排気ガス処理装置であって、
前記保持シール材は、無機繊維を含み、第1および第2の表面に、それぞれ、第1および第2のシート材が設置されたマット材で構成され、
前記第1および第2のシート材は、それぞれの面内で伸び異方性を有し、
シート材の面内において、(引張荷重(N)/公称歪み)で表される値(5%公称歪みでの値)が、最小となる方向を易伸び方向とし、最大となる方向を難伸び方向としたとき、
前記第1のシート材は、前記易伸び方向と前記難伸び方向の成す角度がθdA(0<θdA≦90゜)であり、前記第2のシート材は、前記易伸び方向と前記難伸び方向の成す角度がθdB(0<θdB≦90゜)であり、
前記保持シール材の巻回方向に対して、前記第1のシート材の易伸び方向がなす角度θA(0≦θA≦θdA)と、前記保持シール材の巻回方向に対して、前記第2のシート材の易伸び方向がなす角度θB(0≦θB≦θdB)との間には、θA/θdA<θB/θdBの関係が成立し、
前記保持シール材は、前記第2の表面が前記排気ガス処理体の外周面と接触するようにして、前記排気ガス処理体に巻き回されることを特徴とする排気ガス処理装置。 - 前記排気ガス処理体は、触媒担持体または排気ガスフィルタであることを特徴とする請求項10に記載の排気ガス処理装置。
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US7550118B2 (en) * | 2004-04-14 | 2009-06-23 | 3M Innovative Properties Company | Multilayer mats for use in pollution control devices |
JP4663341B2 (ja) * | 2005-01-25 | 2011-04-06 | イビデン株式会社 | 排気ガス浄化装置のエンドコーン部用断熱材 |
JP4665618B2 (ja) * | 2005-06-10 | 2011-04-06 | イビデン株式会社 | 保持シール材の製造方法 |
JP5068452B2 (ja) * | 2005-10-07 | 2012-11-07 | イビデン株式会社 | 保持シール材および排気ガス処理装置 |
JP2007177767A (ja) * | 2005-12-28 | 2007-07-12 | Ibiden Co Ltd | 排気ガス処理体用の保持シール材、排気ガス処理装置及び保持シール材の製造方法 |
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Cited By (1)
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US12246511B2 (en) | 2017-03-15 | 2025-03-11 | Samsonite Ip Holdings S.A R.L. | Biaxially oriented thermoplastic polymer laminate films for luggage articles and methods of making the same |
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KR100979614B1 (ko) | 2010-09-01 |
CN101429886A (zh) | 2009-05-13 |
KR20090046668A (ko) | 2009-05-11 |
CN101429886B (zh) | 2011-11-09 |
EP2058425B1 (en) | 2013-05-01 |
EP2058425A1 (en) | 2009-05-13 |
US20090114097A1 (en) | 2009-05-07 |
JP2009113336A (ja) | 2009-05-28 |
US8038758B2 (en) | 2011-10-18 |
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