楊木單板壓密化的研究.pdf

1、東北林業(yè)大學(xué)碩士學(xué)位論文楊木單板壓密化的研究姓名：張杰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：木材科學(xué)與技術(shù)指導(dǎo)教師：宋魁彥20060601AbstractPoplarveneercompressionisanewtechnologyFollowingplasticitymeoryofwood，threephasesofirltenerating，compressing，shapingwereprocessedtoimproVephysical鋤dme

2、challicalc印abilityThistecllIlologyeXpandstheusingareaofplantationgrownPopl碼aIldimprovesitswortllinessFourfhctorswereconsideredinthistestincludingsteamitlgtime，compressingtemperature，pressurea11dshapingtimeSinglefactorSte

3、Stswereta：kentofollnd0uttlleefrectoff如torsonrecoveryrateTestsofBe帆eensubjectsE恐cts、veretal【entof01mdthebesttechniquepar鋤etersPhysicala11dmechanicalc印abilitieswerecomparedbet、ⅣeenorigiIlalveneera11dh_eatedVeneeLThestlldys

4、howedthat：1nisfeaSibletoproducecompressedveneerbyusingPoplaLWi廿1compressingtemperatLlreimproVed，pressureexpandedandshapingtimelengmen，air_dryingrecoVeryratedropped，we_【tingrecoveryratedropped，boilingrecoveryratedl砷pedtoo

5、HoweVer，therecoVeryratesdroppedfirst，andthenrisenwithste眥ingtimelen百hen2Infollrfactors，thee任色ctofcompressingtimewasthemoStsignmcam，a11dthenwastlleste鋤i119血ne趾dpressure；thee丘宅ctofcompressingtemperatllrewas也eleaSt1、hebestt

6、echniqueparameterwaSgot：160℃compressingtemperature，6MPapressure，10m灑compressingtime，20m血steaming血neBytheseteclllliquesp盯姍eters，廿lerecoVeryrateisonly4735％3PhysicalandmechaIlicalc印abilitieswerecomparedbet、veenoriginalVenee

7、rand扛eatedveneer，thedensityandrigidityofcompressingVeneerwasla瑪erthanthatoforiginalVeneer4Themicrostmctureoforig訪a1veneeraIldtreatedveneerwasobservedTheresultshowedthat，謝mVeneercompressed，舶era11dcaIlalofitwerecompressed，