东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2015年
6期
103-106
,共4页
竹束单板层积材%聚醋酸乙烯乳液胶%预压工艺%力学性能
竹束單闆層積材%聚醋痠乙烯乳液膠%預壓工藝%力學性能
죽속단판층적재%취작산을희유액효%예압공예%역학성능
Bamboo-bundle laminated veneer ( BLVL)%Polyvinyl acetate ( PVAc)resin%Prepress densification technology%Mechanical properties
为利用间歇式热压工艺加工大尺寸竹束单板层积材(BLVL),提出采用酚醛树脂胶(PF)和聚醋酸乙烯乳液胶( PVAc)混配胶液浸渍纤维化竹束单板工艺来增加板坯的初黏性和预压性能,并对预压板坯性能的影响因素进行研究,主要包括m(PF )∶m(PVAc)、预压时间和预压温度等,分析不同m(PF)∶m(PVAc)对BLVL力学性能的影响。结果表明:m( PF)∶m( PVAc)=6∶1、预压时间为15~30 min、预压温度为50~60℃时,预压板坯的性能较优,制得的BLVL具有较高的力学性能,弹性模量、静曲强度和水平剪切强度分别为:25.47 GPa、255.62 MPa和18.22 MPa。
為利用間歇式熱壓工藝加工大呎吋竹束單闆層積材(BLVL),提齣採用酚醛樹脂膠(PF)和聚醋痠乙烯乳液膠( PVAc)混配膠液浸漬纖維化竹束單闆工藝來增加闆坯的初黏性和預壓性能,併對預壓闆坯性能的影響因素進行研究,主要包括m(PF )∶m(PVAc)、預壓時間和預壓溫度等,分析不同m(PF)∶m(PVAc)對BLVL力學性能的影響。結果錶明:m( PF)∶m( PVAc)=6∶1、預壓時間為15~30 min、預壓溫度為50~60℃時,預壓闆坯的性能較優,製得的BLVL具有較高的力學性能,彈性模量、靜麯彊度和水平剪切彊度分彆為:25.47 GPa、255.62 MPa和18.22 MPa。
위이용간헐식열압공예가공대척촌죽속단판층적재(BLVL),제출채용분철수지효(PF)화취작산을희유액효( PVAc)혼배효액침지섬유화죽속단판공예래증가판배적초점성화예압성능,병대예압판배성능적영향인소진행연구,주요포괄m(PF )∶m(PVAc)、예압시간화예압온도등,분석불동m(PF)∶m(PVAc)대BLVL역학성능적영향。결과표명:m( PF)∶m( PVAc)=6∶1、예압시간위15~30 min、예압온도위50~60℃시,예압판배적성능교우,제득적BLVL구유교고적역학성능,탄성모량、정곡강도화수평전절강도분별위:25.47 GPa、255.62 MPa화18.22 MPa。
We used intermittent hot-pressing technology and the resin bath technology to manufacture large size bamboo -bundle laminated veneer ( BLVL) .We investigated the effects of prepressing time , prepressing temperature and the ratio of PF/PVAc on the properties of prepressing BLVL , developed the BLVL and analyzed the properties .The slab got better per-formance in main physical and mechanical properties when the ratio of PF /PVAc was 6∶1, the prepressing time was 15-30 min, and the prepressing temperature is 50-60℃.The BLVL made from this technology was good in the modulus of e-lasticity (MOE), bending strength (MOR) and shearing strength (SS),which were 25.47 GPa, 255.62 MPa and18.22 MPa , respectively.