Preparation and performance characterization of EPI wood adhesive with high wet strength and long opening period
First,two emulsions(SAEP3 and SAEP4)for EPI wood adhesive,i.e.one with excellent wet strength(6.4 MPa)but short opening period(40 min),the other with long opening period(145 min)but low wet strength(3.8 MPa),were prepared respectively.Then the effect of the ratio of two emulsions on the properties of composite emulsion adhesive was explored.The research results showed that,when the amount of two emulsions was the same,the synergistic effect was achieved.The opening period of the prepared emulsion(SAEP5)adhesive was 100-120 min,and the wet strength reached 6.4 MPa.Compared with the commercially available SL6517 adhesive tested under the same conditions,its opening period was equivalent,and its wet strength was about 25%higher than that of SL6517 adhesive(average 5.1 MPa).As a result,EPI wood adhesive with high wet strength and long opening period was successfully prepared.
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