The key factors of the pre-coating film coating process are temperature, speed, and pressure. Correctly and reasonably adjusting the relationship between the three according to the specific conditions of the laminating machine will ensure the quality of your coated products.
Coating process conditions
Temperature 95~120°C
Pressure 2~20MPa
Speed ​​5~30m/min
Store at room temperature, store in the sun, keep away from heat, and store in a cool, well-ventilated place.
Precoat film usage
1, the following conditions may affect the quality of the coating
The ink used for printed matter is metal ink; ink is too thick; ink does not dry; paper has high humidity;
If the surface tension of the ink is less than 37 dyne, after the film is coated, it is necessary to check the fastness of the film and perform a post-processing test before deciding whether to use the film in batches.
Involved in die-cutting, indentation, folding, UV glazing, matte and other follow-up process operations, please be sure to test, and then use in batches.
2, the use of thin substrate products is more conducive to the local bump after the coating process.
3. It is recommended that you do not use any experience, or change the printing materials, process conditions, or other changes, be sure to conduct a small batch test and then decide to use it in large quantities.
4. When using in winter, it is necessary to process the precoating film and the printed matter before use in the operating room to achieve temperature balance.
5. After the pre-coating film is unpacked, it shall be placed on a wooden pallet, and the film shall be prohibited from directly contacting the ground.
Jintu hot and cold integrated multifunctional laminating machine can be used for laminating all kinds of paper prints, including documents, recipes, business cards, cards, covers, pictures, drawings, paper photos and other paper prints, and the temperature and speed can be freely adjusted. ,Applicable to all kinds of different materials, can independently adjust the tension on the left and right film and film on both sides, different media, different film materials, different devices print can achieve the best film effect, to meet different professional requirements.
Laminating FAQs
Q: The temperature of the film is enough. Why is the film fastness still not good?
A: The film temperature refers to the surface temperature of the heating roller at the point of engagement between the heating roller and the pressure rubber roller when the film is covered. Usually, the temperature sensor of the laminator is placed on the edge of the heating roller, the detected temperature is not completely the temperature of the coating film, and the detected temperature value is related to the distance between the temperature sensor probe and the heating roller. The authenticity of the detected temperature must be ensured. The closer the detection point is to the film-covered part, the closer the temperature-sensing head is to the roller and the more accurate the measured temperature is. In normal film temperature conditions, the film's fastness can be guaranteed.
Q: After the film is coated, does the adhesiveness between the pre-coating film and the printed material change?
A: Immediately after lamination, the adhesive fastness between the precoat film and the printed material can only reach about 70% of the maximum fastness. With the passage of time, the adhesive fastness will increase and the maximum adhesive fastness will be achieved. It takes about 7 days to get it.
Q: How to prevent the filming product from rolling the line, when the irregularities from the film?
A: There are several reasons for the local film-breaking problems that occur when rolling lines or bumps. The reason for this is that the adhesion between the pre-coating film and the printed matter is insufficient. Therefore, conducting tests in advance is an important means to avoid problems after a large number of coated films. Of course, it is necessary to accumulate some work experience. Therefore, it is necessary to check the condition of the ink according to the contents of the instruction for use of the precoat film. The important point is that the ink must be fully dried, especially in the season when the ambient temperature is low. Phenomenon, a small amount of solvent remaining in the ink will volatilize through the film heating process, resulting in insufficient bonding force between the pre-coating film and the printed material, and the phenomena of filming from the rolling line and the unevenness. If an expired precoating film is used, the performance of the adhesive layer may be deteriorated, which may result in insufficient adhesion and may cause the rolling line to start filming. Therefore, it is necessary to consider the quality of the ink, the paper, the lamination process, and the quality of the pre-coating film in order to prevent the film from rolling.