复合针刺非织造材料吸声性能-.研究

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1、ABSTRACT骶quency1200thorn／m地outputmlwingoffiberwebi1：1．5，舱edleddepthof7～llmm，thcp麟andco璐of鹏edlingof2～8．(2)PETneedlepunchingmaterialshaVegoodairpermeabilit)，withtheporosityofmoreth拍90％．Themlalinsulationpropeniesofspecime舾arepr叩0nionaltothickness，s耐．acedensity，锄dareinVerselyproponi

2、omlt0porosity’permeability，etc．T11roughtheanalysisofmechanicalpropertiesofthespecimenS，thereIationShipbetweenthe仔actureStren昏handbulkdensitywascharacterizedinalinearequation．(3)Theacousticabsorption／acousticinsulationperfomanceofnon-wovensweretestdbyusingtheSW463ofmaterialstesti

3、nginstrument，itwerefoundthatthicknesshasa鲈eaterimpactontheacousticpropenies．1ncreaSingthicknesscanimproVethesoundabsorptionperformance，butdoesn’tobViouslya疏ctonthesoundinSulation．IncreasingthebaSisdenS．tycanbothimprovethesoundabsorptionperformanceandsoundinSulationperformance．Tb

4、acertaineXtem，thefinerfiberfineness，thebenersoundabsorption，anddoesn’te行’ectobViouslyonthesoundinsulation．Using5cmthickcaVitycanbothsignificantlyimprOVetheacouSticpropeniesofmaterials，andalsosaVeinteriorspace．(4)Theoptimumconditionsofseconda叫reinforcementofthePETcompositeneedlep

5、unchingsoundabsorbingmaterialsareasfollows：aRer-thermaI·moldingtemperature150℃，aRer-thermal-moldingtime4min～5min，a毹r-thermaI—moldingpressure7MPa～12MPa．ARerthermalmoldin岛thematerialshaVehigherhardness，betterdimensionstability’higherbreal(ingstren戳handlessMD／CDratio．1naddition，the

6、soundabsorptioncoe俑cientofthematerialsbecomessmallerbecauseofthelowerthickness．MaYongxi(TeXt．1eEn舀neerin曲SuperVisedbyWangHongKEYWORDS：needlepunchin参sound．absorbingmaterials，polyester'soundabsorptioncoef．矗cient．soundtransmissionlossIV目录第一章前言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．1针刺吸音非织造材料的研究

7、背景⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一11．2多孔吸声材料介绍⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．3吸声材料的国内外研究和发展状况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯41．4吸声材料的应用⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．51．5本课题的研究内容及意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．6第二章复合针刺非织造吸音材料的试制⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯82．1纤维原料的选用与物理性能测试⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一82．2PET非织造材料的制备工艺研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一112．3试样的研制⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯⋯⋯⋯⋯⋯162．4本章小结⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯17第三章