Film materials have been widely used in the label industry due to their light weight, good flexibility, and high transparency. This paper introduces the common methods of printing processing of thin film materials, such as flexographic printing, micro-nano printing, inkjet printing, atbp. It also discusses some precautions involved, such as the selection of printing equipment, the selection and processing of printing materials, the adjustment of printing process parameters, atbp.
4 Common Methods Of Printing And Processing Film Materials
1. Letterpress printing
Letterpress printing is one of the printing methods widely used in the printing of film materials. It is suitable for the printing of various types and large printing quantities, and is often used for printing packaging, trademarks, advertisements, atbp. The main principle of letterpress printing is to create a raised part of the graphic on the surface of the printing plate, and then transfer the ink on the surface of the letterpress to the printing material through pressure. Sa kanila, UV letterpress printing is a relatively advanced printing method with good quality and high efficiency. Since the ink dries instantly, the film can be rewound without lamination.
2. Flexographic printing
Flexographic printing technology is an important method suitable for processing thin film materials. It uses a flexible substrate and an elastic printing plate and uses printing ink or conductive adhesive to print the required patterns and circuits on the substrate. The main technological process of flexographic printing includes layout making, ink blending, paglilimbag, drying, and compounding. Sa kanila, Ang paggawa ng layout ay isa sa mga pangunahing hakbang, at karaniwang ginagamit na mga pamamaraan sa paggawa ng layout ay kinabibilangan ng photolithography, pagkakalantad ng electron beam, at pag-print ng inkjet.
3. Screen printing
Ang solvent ink screen printing ay isang tradisyonal na paraan ng pag-print, karaniwang gumagamit ng sheet-fed printing. Ang pag-print na may sheet-fed ay may mababang halaga, magandang epekto, at malakas na kakayahang umangkop, at ito ang pangunahing paraan ng pag-imprenta para sa mga materyal na self-adhesive na may sheet-fed film. Sa kasalukuyan, ang medyo bagong paraan ng screen printing ay UV screen printing, na maaaring i-print sa isang solong sheet o sa isang roll.
4. Gravure printing
Ang gravure printing ay isang karaniwang paraan ng pag-print para sa mga self-adhesive na materyales sa pelikula. Ginagamit nito ang malukong bahagi ng gravure layout upang tanggapin ang tinta, at inililipat ang tinta sa materyal sa pag-print sa pamamagitan ng presyon ng pag-print upang mabuo ang nais na pattern o teksto. Gravure printing is widely used in film self-adhesive labels, stickers, decorative materials, and other fields due to its high printing precision, rich colors, and good effects. Gravure printing machines are suitable for printing long-run, high-quality labels, such as beer labels, battery labels, atbp.
Precautions For Printing And Processing Of Film Materials
Printing and processing of thin film materials is a complicated process, and the following items need to be paid attention to:
① Selection and processing of materials: The selection and processing of printing materials are important factors affecting printing quality. When choosing printing materials, factors such as adaptability, cost, and reliability need to be considered. At the same time, in terms of material handling, such as substrate surface treatment, cleaning, and drying, atbp., kailangan din ng pansin upang matiyak ang kalidad ng pag-print at kahusayan sa produksyon. Ang mga materyal na plastic film ay nangangailangan ng pang-ibabaw na paggamot bago ang pag-print upang mapabuti ang enerhiya sa ibabaw o kakayahang magbasa, kung hindi, ang tinta at laso ay hindi magiging matatag at madaling mahulog.
② Pagpili at pagsasaayos ng kagamitan: Ang iba't ibang paraan ng pag-print ay nangangailangan ng iba't ibang kagamitan sa pag-print, tulad ng flexographic printing ay nangangailangan ng flexible printing machine, Ang inkjet printing ay nangangailangan ng inkjet printer, atbp. Kapag pumipili ng kagamitan, mga kadahilanan tulad ng mga katangian ng materyal sa pag-print, kailangang isaalang-alang ang mga pangangailangan sa produksyon at badyet. At the same time, kapag inaayos ang mga parameter ng kagamitan sa pag-print, tulad ng bilis ng pag-print, presyon, temperatura, atbp., kailangan din itong ayusin ayon sa mga partikular na materyales at mga kinakailangan sa pag-print.
③ Control of printing process: Control of the printing process is the key to ensure printing quality and production efficiency. It is necessary to formulate the printing process in the preparation work before printing, and to control and adjust the printing parameters in actual operation. At the same time, regular inspection and maintenance of printing equipment and materials is required to ensure printing quality and production efficiency.
First of all, the surface of the material must be pretreated and up to standard. Pre-coat the coating of affinity ink on the surface of the material to improve its wetting ability to the ink and increase the firmness of the ink. This treatment method is the most ideal, common, and stable method for thin film materials. Pangalawa, the use of matching special inks, varnishes, at ang mga ribbon ay dapat na masuri nang maaga. Sa wakas, upang kontrolin ang kapal ng layer ng tinta, ang tinta ay dapat na matuyo nang lubusan. Para sa overprinting bahagi ng tinta, kailangang mag-ingat upang hindi matuyo ang tinta sa ibabang layer.
④ Mga isyu sa kapaligiran at kaligtasan: Sa panahon ng proseso ng pag-print ng mga materyales sa pelikula, kailangan ding bigyang pansin ang mga isyu sa kapaligiran at kaligtasan. Ang wastewater, basurang gas, at ang mga basurang nabuo sa proseso ng pag-print ay kailangang maayos na gamutin, at kasabay nito, mga isyu sa kaligtasan tulad ng toxicity at corrosiveness ng printing liquid at printing ink ay kailangang bigyang pansin, upang matiyak ang kaligtasan ng kapaligiran ng produksyon at kalusugan ng mga manggagawa sa pag-print.
Sa madaling salita, this article introduces the printing method of film self-adhesive materials and the matters needing attention. For relevant practitioners who need to print and process film self-adhesive materials, it is very necessary to master this knowledge. In practical application, it is also necessary to select the appropriate printing method and technical parameters according to the specific situation, so as to obtain the best printing effect. At the same time, it is also necessary to constantly pay attention to the development of new technologies and materials to improve production efficiency and print quality.
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