摘要
在电场作用下，通过聚醋酸乙烯乳液（ＰＶＡｃ）胶合杨木单板的对比试验，初步探索了电场对胶合的影响。结果表明：①电场强度对胶合强度有极显著的影响；②在涂胶量不同，其他工艺条件相同的情况下，达到理想胶合强度的垫板间电势差是不同的。单板含水率为１２０％，ＰＶＡｃ的固含量１７％，粘度６０Ｐａ·ｓ（２０℃），在室温（１７～２４℃）下加压（０４５～０８５ＭＰａ）３ｈ，当涂胶量为１２０ｇ·ｍ－２和１８５ｇ·ｍ－２时，达到理想胶合强度的垫板间电势差分别为４０～６０Ｖ和３０Ｖ左右。
By means of the
contrast tests of PVAc bonding to aspen veneer in the electric field,the influence of
electric field to woodbonding was preliminarily explored.The results showed that the
adhesive strength was sigificantly affacted in intensive electricity.The good adhesive
srtengths potential difference of backing plats was distinct in different glue weight
technology.For example,120% moisture content of the fast poplar veneer ,PVAc with 17%
solids content, 60 Pas viscosity at 20,and coldpressed(045085 MPa) to the veneer at
room temperature(1724) for 3 hours,as the single spread 120 gm-2 or 185 gm-2,the
good adhesive strengths potential difference of backing plates was 4060V or around 30
V.
出处
《浙江林学院学报》
CSCD
1999年第2期109-113,共5页
Journal of Zhejiang Forestry College
关键词
电场强度
电子胶合
胶接
单板
聚醋酸乙烯乳液
electric field strength
electronic gluing
adhesive bonding
veneer
PVAc
