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Self-sealing bags are a kind of packaging bags that we often use in our daily life. The main reason why ziplock bags are used by us is that ziplock bags have good sealing properties. For this reason, ziplock bags can be used in food, industry, Various fields such as agriculture are widely used. The following describes the common problems and solutions of the ziplock bag making machine.
1. What should I do if the heat sealing of the self-sealing bag making machine does not completely cause the contents to leak or deteriorate?
Cause: The anti-pollution heat-sealability of the film is poor, mainly because the resin used in the inner seal layer is not suitable.
Countermeasure: A film with good anti-pollution heat sealing properties is used. In general, LDPE has a moderate anti-pollution heat sealability, EVA has good anti-pollution heat sealability when VA content is large, LDPE also has good anti-pollution heat sealability, and ionic resin and metallocene polymer Excellent anti-pollution heat sealability.
2. What should I do if the self-sealing bag making machine is brittle and brittle?
Reasons: (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 is too sharp or the coated Teflon is damaged; (5) The bottom seal of the silicone rubber is too hard; (6) during the compounding and curing process, a part of the adhesive penetrates into the inside of the film. Due to the penetration of the adhesive, the toughness (impact resistance) is reduced and the brittleness is improved. (7) After the plastic composite packaging bag is cooled and placed, the heat seal strength is increased, and there is also a tendency to become brittle. .
