How can we use the bag making machine correctly?

The bag making machine has become an indispensable tool in the packaging industry, but only when we use the bag making machine correctly can it play its role properly.

What should I do if the bag making machine has poor hot seal strength?

Reasons for appearance:

(1) the adhesive in the composite film is not sufficiently hardened;

(2) The hot seal conditions are unsuitable;

(3) The distance between the hot seal knife and the cold knife is too great;

(4) There is a problem with the film of the inner seal layer;

(5) The hot sealing capacity of the ink is poor, leading to a decrease in the bonding strength of the film on the hot-sealed part;

(6) dust, spray powder and other substances are adhered to the hot cover;

(7) The bonding strength is low* or the bonding strength of the hot-sealed part is too low.

What countermeasures should we take if the bag making machine has poor hot seal strength?

(1) Heat conservation and aging promote the hardening of the adhesive (aged, hardened) and improve the bonding strength and heat resistance of the composite film.

(2) Choose the best hot seal conditions (temperature, time and pressure) according to the structure and hot seal condition of the composite film or improve the hot seal process, the hot seal

Refrigerate immediately thereafter.

(3) Check the durability and storage conditions of the hot seal film. If the hot seal layer uses the old foil charge and the hot-sealed foil.

Note.

4) Increase the thickness of the hot-sealable film.

(5) Change the type of hot seal film and use an eco-friendly hot seal film.

(6) Check whether the quality of the adhesive meets the requirements (the excretion of low molecular substances in resin sometimes affects the composition of the adhesive).

(7) Improve the hot seal performance of the hot seal layer (substrate), check the lubricant content.

(8) Check the monomer content of MDI in the compound glue.

(9) Check the processing rate of the hot cover.

(10) Replace ink

(11) Change the printing pattern of the package leaflet so that the ink-printed part avoids the hot seal part or change the hot seal method. (Do not make sure that metal tin is not printed on the seal).

What should I do if air bubbles or uneven surfaces appear in the hot-sealed part of the bag making machine?

Reason:

(1) When the bag making machine is hot-sealed to a structure containing hygroscopic materials such as nylon film, the hygroscopic film produces bubbles when it absorbs moisture;

(2) the hot-seal knife or silicone cushion is uneven;

(3) Insufficient hot-screen printing;

(4) The bag-making machine uses single-component adhesives, such as chlorocarbons. When the bag is hot sealed, the hot cover tends to uneven holes.

Countermeasures:

(1) Store the raw materials and semi-finished products properly to avoid moisture absorption;

(2) Check or adjust the hot-seal knife and the hot-seal silicone cushion;

(3) Replace the adhesive.

ZHEJIANG GREENPRINT MACHINERY CO.,LTD strives to offer high quality bag making machines at reasonable prices, efficient production times and the most professional customer service.