肥老熟妇伦子伦456视频,角色扮演调性游戏双男主海棠,国产女同性黄网在线观看,伊人久久大香线蕉综合75

The reason why the bag making machine is brittle and brittle is:

(1) The heat sealing temperature is too high;

(2) The pressure is too large;

(3) The heat sealing time is too long;

(4) The edge of the upper sealer of the bag making machine is too sharp or the coated Teflon is damaged;

(5) The silicone rubber sealed at the bottom of the bag making machine is too hard;

(6) During the compounding and aging process, a part of the binder penetrates into the inside of the film. The substrate is affected by the penetration of the binder, the toughness (impact resistance) is decreased, and the brittleness is improved;

(7) After the plastic composite packaging bag is cooled and placed, the heat sealing strength is increased, and there is also a tendency to become brittle.

Countermeasures:

(1) selecting a suitable processing temperature, pressure and heat sealing time according to the heat sealing property of the material of the inner sealing layer;

(2) improving the surface condition of the upper heat sealing knife of the bag making machine, so that the surface of the sealing device is flat;

(3) Covered with Teflon cloth;

(4) Select a silicone rubber mat of suitable hardness