I believe that many companies have encountered similar phenomena: the semi-finished products of hard-printed films have been "successful" in the compounding process, which is regrettable. At this time, some soft bag factories will attribute the reason to the operation of the workers. In fact, have you ever thought about it, perhaps it is the problem of the glue screen roller on the compound machine.
1. When purchasing a dry laminating machine, if the soft bag factory does not require it, the gluing wire rollers on the original machine are generally between 80 and 120 lines, which is suitable for ordinary laminating and laminating of single bags. Use of adhesive.
If the compound bag with high quality is required, the gluing screen roller of the laminating machine should be selected reasonably, and the line number of the screen roller should be determined, so as to control the gluing amount and coating uniformity, and improve the product quality of the compound bag.
2. There are many types of anilox rollers, and there are only two types of dry-type laminating machines for flexible packaging: one is cone-shaped, that is: pyramidal (quasi-pyramid-shaped) and prism-shaped, that is: truncated pyramid-shaped (quadrilateral platform) type).
The dry laminating machines currently used for flexible packaging basically use quadrangular pyramid-shaped screen rollers. However, the cell depth of a certain number of screen rollers should also be within a certain range. The deeper the cell of the screen roller, the larger the mesh capacity, the more the amount of adhesive transfer, and the service life of the screen roller It will become shorter, so pay attention to the depth of the mesh hole when selecting the anilox roller, you can directly consult the manufacturer of the anilox roller.
3. The production form of the anilox roller can be basically divided into two types: one is electric carving; the other is extruded by special equipment. In terms of production method, different mesh rollers have different mesh openings and different forms of use.
In the compound machine using a scraper, the scraper angle should be strictly adjusted, and the amount of glue can also be controlled. General manufacturers basically use special equipment for extrusion. The line number of the anilox roller should be correctly selected according to the quality requirements of the packaging bag.
4. The specific selection method: when the ordinary composite bags can be made by Nikkei, and the single-component adhesive can be used, the glue line wire roller of 80-120 lines can be used.
For the production of general composite packaging bags, when using two-component adhesives, 120-160 wire mesh rollers are generally available. Making high-end packaging bags by yourself, the requirements are more strict in compounding, and the two-component polyurethane adhesive is generally used to select 160-200 line screen rollers.
To sum up, qualified enterprises can reserve more glue rollers with different network cables for use. After use, the mesh holes of the network cable rollers must be cleaned to prevent network clogging. If you do not use them for a long time, you must use a bristle brush and Ethyl acetate is repeatedly cleaned, and finally wiped off with a dry cloth, otherwise it will be cleaned with ethyl acetate after blocking the net and cannot be cleaned with ethyl acetate.
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