(1) Through the heat preservation aging to promote the adhesive hardening (curing, curing), improve the composite strength and heat resistance of the composite film.
(2) According to the composition of the composite film, heat sealing state, choose the best heat sealing conditions (temperature, time and pressure), or improve the heat sealing method, cooling immediately after heat sealing.
(3) Check the preservation period and preservation conditions of the heat sealing layer film, if the heat sealing layer is used old batch number of film and the film after heat sealing treatment, special attention should be paid to.
(4) Increase the thickness of the heat sealing film.
(5) Change the type and grade of the heat sealing film, and use the inner sealing film with anti-pollution heat sealing.
(6) Check whether the grade of the adhesive meets the requirements (resin in the low molecular material seepage, sometimes to the composition of the adhesive will affect).
