How to deal with brittle and brittle breakage of courier bag making machine sealing?
(1) the heat sealing temperature is too high;
(3)Heat sealing time is too long;
(4)The edge of the upper seal is too sharp or the covered PTFE is damaged;
(5)The silicone rubber at the bottom of the seal is hard;
(6)In the compounding and curing process, a part of the adhesive into the film. Substrate due to the penetration effect of adhesive, toughness (impact resistance) decreased, brittleness increased;
(7) After cooling and placing plastic composite bags, the thermal sealing strength has increased, but also has a tendency to become brittle.
(1) according to the heat sealing characteristics of the inner sealing material, choose the appropriate processing temperature, pressure and heat sealing time;
(2)Improve the surface state of the upper heat sealing knife, so that the surface of the sealing device is smooth;
(3)with Teflon cloth coated intact;
(4) Choose the right hardness of the silicone rubber pad.