竹加工剩余物刨花模压托盘的工艺探讨  

Manufacturing Technology of Molded Bamboo-Particle Pallet from Residues

作　　者：刘震涛 刘乐群[1,2,3] 杨飞 滑亚婷 赵莹 吴国强 LIU Zhen-tao;LIU Le-qun;YANG Fei;HUA Ya-ting;ZHAO Ying;WU Guo-qiang(Zhejiang Academy of Forestry,Hangzhou 310023,Zhejiang,China;Penno New Materials Institute,Hangzhou 310023,Zhejiang,China;Hangzhou Penno Packtech Co.Ltd,Hangzhou 310023,Zhejiang,China;Hangzhou Guoli Industrial and Trading Group Co.Ltd,Hangzhou 310023,Zhejiang,China)

机构地区：[1]浙江省林业科学研究院,浙江杭州310023 [2]沛诺新材料研究院,浙江杭州310023 [3]杭州沛诺包装科技有限公司,浙江杭州310023 [4]杭州国立工贸集团有限公司,浙江杭州310023

出　　处：《木材科学与技术》2022年第2期81-86,共6页Chinese Journal of Wood Science and Technology

基　　金：杭州市主动设计重大专项“农林剩余物模压制备刨花成型托盘关键技术研究与产业化”(20172016A10);浙江省省院合作重点专项“农林废弃物刨花模压托盘制备关键技术研究”(2017SY07);国家标准项目“竹木刨花模压成型托盘通用技术条件”(20180966-T-432)。

摘　　要：以二苯基甲烷二异氰酸酯(MDI)和脲醛树脂(UF)为胶黏剂,竹加工剩余物制成的刨花制备模压托盘,采用正交试验对刨花含水率、施胶量、热压工艺等参数进行探讨。结果发现:在一定压力范围内,热压压力越大,托盘的力学性能越好,但热压温度不宜过高。在利用MDI胶制备托盘时,建议控制施胶量,避免施胶过量出现溢胶的情况;利用UF胶制备时,在一定范围内,提高施胶量利于托盘模压成型,提高表观性能。在刨花含水率10%左右,MDI添加量6%,热压压力21 MPa,热压温度125℃的优化工艺条件下,MDI胶制备的模压托盘满足GB/T 41231—2021《竹木刨花模压成型托盘通用技术条件》的要求;在刨花含水率4.5%左右,脲醛树脂施胶量20%,热压压力21 MPa,热压温度125℃的工艺条件下,脲醛胶制备的模压托盘未满足GB/T 41231—2021的要求,建议对脲醛胶进行改性后进一步优化制备工艺。Using diphenylmethane diisocyanate(MDI)and urea-formaldehyde resin(UF)as adhesives,bamboo residues were used to manufacture molded pallets.The results showed that within a certain hot pressure range,the mechanical properties of the molded pallets increased with the increasing of the hot pressure.When applying MDI in the molded pallets,it was suggested to control the resin content to avoid the excessive glue overflow.When applying UF in the molded pallets,it was beneficial to molding and the appearance properties to a certain degree by increasing the resin content.The optimized process includes 10% of shavings moisture content,6%of the MDI content,21 MPa of hot-pressing pressure,and 125℃of hot-pressing temperature.The performance of the molded pallets prepared with MDI met the requirements of the GB/T 41231-2021"General specification for moulded pallets with bamboo and wood particles".At the conditions of 4.5% of shavings moisture content,20% of UF resin content,21 MPa of hot-pressing pressure,and 125℃of hot-pressing temperature,the performance of the molded pallets prepared with UF resin did not meet the requirements of GB/T 41231-2021,it was suggested to optimize the preparation process after modify the UF resin.

关 键 词：竹加工剩余物 刨花模压托盘 胶黏剂 工艺 

分 类 号：TS653[轻工技术与工程] S784[农业科学—林学]