Simple analysis of seal brittleness and brittle fracture during bag making machine

The main reasons for the brittleness and brittle fracture of the sealing during the bag making machine are as follows:
1. The heat seal temperature is too high.
2. Excessive pressure.
3. The heat sealing time is too long.
4. The edge of the upper sealer is too sharp or the wrapped PTFE is damaged.
5. The silicone rubber of the bottom seal is too hard.
6. During the compounding and curing process of the bag-making machine, part of the adhesive infiltrates into the film. Due to the penetration of the adhesive, the toughness (impact resistance) of the substrate decreases and the brittleness increases.
7. After cooling and placing, the heat sealing strength of the plastic composite packaging bag increases, and it also tends to become brittle.
For this kind of situation, Zhengding Machinery also collected and summarized relevant solutions for your reference. Let's learn about it
Solutions:
1. Select the appropriate processing temperature, pressure and heat sealing time of the bag-making machine according to the heat sealing characteristics of the material of the inner sealing layer.
2. Improve the surface state of the upper heat sealing knife to make the surface of the sealer smooth.
3. It is covered with polytetrafluoroethylene cloth in good condition.
4. Select silicon rubber pad with appropriate hardness.