Nyitak dina bahan timer napel dumasar-pilem bisa nampilkeun tantangan, jeung getihan tinta mangrupakeun masalah umum encountered ku pabrik print. Tinta serelek nujul kana firmness goréng tina lapisan tinta dicitak dina beungeut bahan alatan faktor kayaning tegangan permukaan low, curing UV teu cukup, jeung aditif tinta kaleuleuwihan. Kaleungitan tinta percetakan parah henteu ngan mangaruhan kualitas produk, tapi malah ngabalukarkeun scrapping of bets produk. Dina artikel ieu, urang bakal ngajalajah tilu panyababna tinta ngaluarkeun getih dina bahan napel diri pilem anu dicitak sareng nyayogikeun solusi anu efektif pikeun ngatasi masalah ieu..
1. tegangan permukaan low bahan pilem
Salah sahiji alesan utama pikeun titik-titik tinta dina bahan napel diri dumasar pilem anu dicitak nyaéta tegangan permukaan pilem anu handap.. Sacara umum, beuki luhur tegangan permukaan, the better the ink fastness after printing. There is no problem with the surface tension of most paper-like materials, but the surface tension of film-like materials is often uneven. This low surface tension can lead to poor ink adhesion, which can lead to reduced ink droplet and print quality. If there is ink loss during the printing process, you can use a dyne pen to test the surface tension value of the material. Sacara umum, materials with a surface tension lower than 38 datones are prone to ink loss. To resolve this issue, consider the following solutions:
A. Surface treatment: implement the surface treatment process to enhance the surface tension of the film material. This can be achieved by corona treatment, flame treatment or plasma treatment, which can change the surface characteristics, ningkatkeun wettability jeung ngamajukeun adhesion tinta.
B. Jas primer: Larapkeun jas primer anu cocog kana bahan pilem sateuacan dicitak. Primer mantuan nyieun beungkeut antara tinta jeung beungeut bahan, ngaronjatkeun adhesion tinta jeung ngurangan kasempetan tinta dripping. Taroskeun ka supplier palapis anjeun pikeun milih primer anu cocog anu cocog sareng bahan pilem sareng formulasi tinta. Sababaraha pausahaan percetakan labél profésional ogé bakal langsung ngagunakeun coated PET bahan timer napel pikeun percetakan. Lapisan éta ngarobih ciri ngabasuh permukaan bahan napel diri PET, jeung kinerja stabil, jeung firmness tina lapisan tinta bisa éféktif ningkat.
2. Curing UV teu cukup
Curing UV anu henteu cekap ogé bakal ngakibatkeun tetesan tinta nalika nyitak bahan napel-tipe pilem. Incomplete curing will result in an ink layer that does not achieve optimum hardness and adhesion, resulting in poor smearing and fastness. Incomplete curing means that the surface layer of the printing ink has been dried and cured, but the inside is not completely cured. The ink loss caused by this kind of situation mostly occurs in the printing of large area patterns. This is because large-area patterns use a large amount of ink, and the inside of the ink layer is not so easy to cure completely. To resolve this issue, you can refer to the following solutions:
A. UV Intensity and Dose: Make sure the UV curing system is properly calibrated and delivering adequate UV intensity and dosage. Monitor and adjust UV intensity levels to achieve optimal curing for the specific ink and film material being used. Salaku conto, darker patterns absorb more UV light and often require more power to dry completely. Consult ink and equipment manufacturers for recommended UV curing parameters.
B. Curing time and temperature: optimize the curing time and temperature settings to ensure sufficient exposure and ensure that the ink layer is fully cured. Consult the ink manufacturer’s guidelines for recommended curing parameters and adjust accordingly for the printing conditions and equipment used.
C. Service life of UV lamps: Ayeuna, the service life of UV lamps on toppan printing equipment is between 800 jeung 1000 jam. If the lamps have not been replaced when the rated life is exceeded, it is easy to cause the ink to dry out. Ku kituna, when replacing the UV lamp tube, it is necessary to make detailed records, and when the UV lamp tube reaches the service life, it must be replaced in time.
3. Excessive ink additives
The presence of excessive ink additives will cause ink drops when printing film-type self-adhesive materials. Dina prosés percetakan, the printing ink often encounters the problems of thickening, high viscosity and poor inking. Ku kituna, many operators will choose to add varnish to improve the fluidity of printing ink. Sanajan kitu, if the amount of varnish is used improperly, it is very easy to affect the ink viscosity, surface tension and adhesion performance, resulting in ink drop. Please consider the following solutions to resolve this issue:
A. Ink Formulations: Review and optimize ink formulations with the aim of reducing additive overuse. Since not all materials can be perfectly matched with inks, finding the right ink is best achieved by working closely with the ink supplier to develop a custom ink formulation that balances ink properties and minimizes the risk of ink drops.
B. Compatibility testing: Send the material to the ink supplier for testing to ensure that the ink additive used is compatible with the film material and printing process. Compatibility testing is performed between ink and film materials to determine any interactions or incompatibilities that may cause ink drops. Test different ink formulations and adjust additive levels to find the best combination that provides good adhesion while minimizing ink dripping.
kacindekan
Overcoming the challenges of ink droplet printing in film-based self-adhesive materials requires a multifaceted approach. By addressing the causes of low surface tension, insufficient UV curing and excess ink additives, printers can significantly improve ink adhesion and achieve better print quality. Implement surface treatments or primer coats to enhance surface tension, optimize UV curing parameters to achieve full ink cure, and fine-tune ink formulations to minimize the use of excess additives. By adopting these solutions, manufacturers can overcome ink drop challenges and produce high-quality prints on film-based self-adhesive materials.
