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研究生:周明宏
研究生(外文):Ming-Hung Chou
論文名稱:不同結構層次不織布於吸音上之研究
論文名稱(外文):A Research of Sound Absorption on Combination Layers of Nonwovens
指導教授:廖盛焜
指導教授(外文):Shen-Kun Liao
學位類別:碩士
校院名稱:逢甲大學
系所名稱:紡織工程所
學門:工程學門
學類:紡織工程學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:中文
論文頁數:85
中文關鍵詞:不織布吸音
外文關鍵詞:AbsorptionNonwoven
相關次數:
  • 被引用被引用:3
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本研究主要以針軋不織布為主體,變化不同之丹尼數經針軋製程使纖維糾結再熱壓形成一多孔性材質且配合融噴不織布,並導入靜電紡製程纺出極細之纖維以增加纖維表面積,纖維愈細緻則吸音也愈佳。針軋法所交錯的纖維結構,能先將聲波破壞,再如彈簧般的將聲波轉換成極微量熱能。愈細緻的纖維則單位體積的纖維數就愈多,吸音性也就愈強。再分別以不同層次結構組合分析達到最佳的吸音效果。此測試方法採阻抗管法中的轉換函數法,結果顯示以三層結構組合並以越細緻之纖維層朝音源吸音性最佳,其平均吸音率可達40%,尤其在2500Hz~4000Hz範圍之平均吸音率達95%以上,且總重量只需300g/m2而厚度僅10mm就能達到此效果,此研究成果可廣泛應用於空間裝潢之內裝材。
In this research, needle punching nonwoven fabric is studied. As the denim varies, a fiber is tangled in needle punching manufacturing processes and hot pressed into the porous material based on meltblown fabrics; it is introduced into the electrospinning manufacturing process to produce the extra fine fibers with the great surface area, whereas the finer fiber leads to the better sound absorption ability. The fiber structure constructed by needle punching can destroy the sound wave first, and then transfer the sound wave into minute heat as a spring does. There is a higher fiber number in the finer fiber of a unit volume, so its sound absorption ability is also higher. Furthermore, the best sound absorption effect is given in structural combination analysis of various layers. Transfer function method in impedance tube methods is adopted in this test, and the result shows that the best sound absorption ability occurs in the three-layer structural combination with the finer fiber layer toward the sound source. In addition, the mean sound absorption efficiency in the range of 2500Hz ~ 4000Hz is up to 95 % and even higher, and the effect is obtained as the overall weight is only 300g/m2 and the thickness is only 10 mm. This research outcome can be applied to the materials decorated inside a car or a music classroom.
目 錄
誌謝
中文摘要........................................................................................................Ⅰ
英文摘要.......................................................................................................Ⅱ
目 錄 .............................................................................................................Ⅲ
圖目錄............................................................................................................Ⅵ
表目錄.............................................................................................................Ⅸ

第一章 緒論...................................................................................................1
1-1 前言.................................................................................................1
1-2文獻探討...........................................................................................3
1-3 研究目的.........................................................................................5
第二章 理論....................................................................................................7
2-1音波物性原理...............................................................................7
2-2 吸音材料內音能散失原理..........................................................12
2-3 吸音評估.......................................................................................13
2-4 汽車噪音系統...............................................................................15
2.5 雙麥克風轉換函數理論..............................................................17

2-6 靜電紡絲的基本理論...........................................................................18
2-7 針軋法製造原理...........................................................................22
第三章 實驗方法與設計.............................................................................25
3-1 實驗流程......................................................................................25
3-2 吸音率檢測.................................................................................26
3-2-1 待測材料規格說明........................................................26
3-2-2 測試前準備事項............................................................27
3-2-3 測試系統規格................................................................27
3-3 針軋製程機台與使用材料........................................................29
3-3-1 針軋製程使用之材料.................................................29
3-3-2 針軋機台規格..............................................................30
3-4 靜電紡製程...................................................................................32
3-4-1 靜電紡纖維製作與分析.............................................32
3-4-2 靜電紡實驗材料與儀器.............................................33
第四章 結果與討論..................................................................................35
4-1. 不同厚度、重量及材質吸音材製作與量測..........................35
4-2 單層不織布之吸音率量測與分析...........................................48
4-2-1 針軋不織布之製作與吸音量測分析..........................48

4-2-2 纖維細度改變對吸音率之影響...................................51
4-2-3 熔噴不織布之物性分析.................................................56
4.3 雙層次結構組合之吸音率量測與分析...................................59
4-3-1雙層吸音率的量測分析.................................................59
4-3-2 靜電紡纖維與針軋不織布結合分析..........................61
4-4 三層結構吸音效果分析 ..........................................................64
4-4-1 結合靜電紡纖維吸音率之探討.....................................64
4-4-2 Spun bond與Meltblown 三層之比較..........................66
第五章 結論..................................................................................................69
參考文獻.........................................................................................................71
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