China Plastics ›› 2024, Vol. 38 ›› Issue (8): 40-45.DOI: 10.19491/j.issn.1001-9278.2024.08.007

• Materials and Properties • Previous Articles     Next Articles

Study on adhesive and foaming properties of EVA expandable tape for small volumes

LIU Wei1, YU Caili2, CHEN Xiaocheng1, ZHANG Chun1(), ZHAO Kewen3   

  1. 1.School of Materials and Energy,Guizhou Institute of Technology,Guiyang 550025,China
    2.Guizhou Yonghong Aviation Machinery Co,Ltd,Guiyang 550025,China
    3.Chongqing Xunchang Adhesive Products Co,Ltd,Chongqing 401120,China
  • Received:2023-11-28 Online:2024-08-26 Published:2024-08-19

Abstract:

This study prepared a series of ethylene⁃vinyl acetate (EVA) expandable tapes by using 4,4⁃oxobenzenesulfonyl hydrazine (OBSH)as foaming agent, benzoyl peroxide (BPO) as crosslinking agent, and C9 resin as a tackifier. The effect and mechanism of components on the performance of 2D foam tape were studied. The results indicated that, under the proper blending ratio of EVA/BPO/OBSH/C9 (100/3/3/40), the expandable tape could be foamed at both 170 ℃ and 205 ℃. The expansion rate of the expandable tape exceeded 2 times. And the surfaces of foams were smooth and without irreversible flowing. The tensile strength, the elongation at break and the water absorption of the expansion tape was 5 MPa, 240 %, and less than 5 %, respectively.

Key words: expandable tape, ethylene?vinyl acetate copolymer, acoustic roughness, low volatile organic compound, 4, 4?oxobenzyl sulfonyl hydrazide

CLC Number: