摘要
在电场作用下，通过聚醋酸乙烯乳液（ＰＶＡｃ）胶合杨木单板的试验，初步探索了电场作用时间与胶合强度的关系。结果表明：①电场作用时间对胶合强度影响极显著；②对含水率为１２％的杨木单板，使用ＰＶＡｃ（固体含量为１７％，２０℃时的粘度为６０Ｐａ·ｓ）为胶粘剂，单面涂胶量为１８５ｇ／ｍ２，在室温（１７～２４℃）加压（０４５～０８５ＭＰａ）１０ｈ，上、下垫板间３０Ｖ的电势差从加压后１～４ｈ起施加，板材胶合强度最理想。
Based on experiment of poplar veneers bonded with PVAc in electric field,relationship between
electric field action time and shearing strength between the veneers was preliminarily explored.
Experiment results showed that the shearing strength was significantly affected by the time.
The strength behaved the best when veneer moisture content was 12%, and 185 g/m\+2 of
PVAc(content 17%,viscosity 6.0 Pas at 20 )was spread as adhesive under the following
condition:room temperature (1724 ),0.450.85 MPa of pressure for 10 h, 30V of electric potential
difference among pole plates initiated after 14 h pressing.\=
出处
《木材工业》
北大核心
1999年第3期7-9,共3页
China Wood Industry
关键词
电场
电势差
胶合
杨木单板
PVAC
单板
Electric field
Electric
potential difference
Bonding
Poplar veneer
PVAc
