PET film is a polar film with a surface tension of 45-50 dyn without treatment. It is also a film with good adhesion regardless of the type of plastic ink printed on it. However, when two-component polyurethane glue is used on the way, and after dry lamination with other films, especially with PE films, the phenomenon of the printed ink layer being adhered to the PET film by the glue and delaminating (especially when laminating thicker PE films) sometimes occurs. In other words, the printing ink layer on the PET film partially or completely transfers to the inner film after lamination. So what is the cause? And what are the ways to avoid it?
Why does ink transfer occur after dry lamination of PET film?
Since PET film has excellent barrier properties and is also highly resistant to leakage, it is difficult for solvents to penetrate, and the solvent absorbency of the ink is relatively poor. The binder (resin) of the plastic surface printing ink has good affinity with the PET film, so the printing on the PET film is more secure than the printing ink in the plastic lamination. In fact, the ink layer of the printed PET film will transfer after lamination, regardless of whether it is printed with surface printing ink or printed ink in the lamination.
How to avoid ink transfer
When printing and dry lamination PET film, you should pay attention to the following:
1. Use as little ink as possible and ensure that the ink is completely dry (through-drying) to prevent the phenomenon of ink drying too quickly (especially when printing with chlorinated polypropylene composite plastic inks). If the printing press cannot be set to full speed and the drying oven is not effective, rewind the printed material once and blow it or leave it for a while while rewinding to allow the ink to harden before lamination (when the printed material is left after printing, it is best to rewind and blow it to prevent the printed film from sticking).
2. When laminating, the amount of glue used must be kept to a minimum, and the solvent in the laminating glue should be allowed to evaporate as much as possible during the drying process (the exhaust system of the drying tunnel should be checked frequently to ensure that it is working properly, and the temperature of the laminating drum in the laminating machine should not fall below 70°C).
SUPPMO-800 series PET screen/pad printing ink
The 800 series is a product specially developed for printing on PET film, sheets, stickers and PC materials. It is a semi-gloss, slow-drying solvent-based ink that provides excellent adhesion and flexibility.
PET ink product features:
This series is a high-color-density, slow-drying ink. It is suitable for high-mesh fine printing, has good reprintability, and provides good adhesion, abrasion resistance, glue resistance, scratch resistance and post-processing adaptability.
PET ink scope of application:
Generally, it is used for printing on PET and PC substrates that require processing, as well as various labels and stickers such as membrane switches, signs, nameplates, etc.
Technical parameters:
A: Viscosity: 30000±10000cps
B: Drying speed: surface dry: 15-25min; dry: 24h or 70℃ for 20min
C: Alcohol resistance: 500g force/100 times; general rubber wear resistance: 500g force/100 times
D: Diluent options: 783 (slow drying); 788 (extra slow drying)
E: Washing agent: X-705
F: Applicable mesh: 40-150T, printing area: 30-40㎡/kg/120T
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| Polythiol/Polymercaptan | ||
| DMES Monomer | Bis(2-mercaptoethyl) sulfide | 3570-55-6 |
| DMPT Monomer | THIOCURE DMPT | 131538-00-6 |
| PETMP Monomer | PENTAERYTHRITOL TETRA(3-MERCAPTOPROPIONATE) | 7575-23-7 |
| PM839 Monomer | Polyoxy(methyl-1,2-ethanediyl) | 72244-98-5 |
| Monofunctional Monomer | ||
| HEMA Monomer | 2-hydroxyethyl methacrylate | 868-77-9 |
| HPMA Monomer | 2-Hydroxypropyl methacrylate | 27813-02-1 |
| THFA Monomer | Tetrahydrofurfuryl acrylate | 2399-48-6 |
| HDCPA Monomer | Hydrogenated dicyclopentenyl acrylate | 79637-74-4 |
| DCPMA Monomer | Dihydrodicyclopentadienyl methacrylate | 30798-39-1 |
| DCPA Monomer | Dihydrodicyclopentadienyl Acrylate | 12542-30-2 |
| DCPEMA Monomer | Dicyclopentenyloxyethyl Methacrylate | 68586-19-6 |
| DCPEOA Monomer | Dicyclopentenyloxyethyl Acrylate | 65983-31-5 |
| NP-4EA Monomer | (4) ethoxylated nonylphenol | 50974-47-5 |
| LA Monomer | Lauryl acrylate / Dodecyl acrylate | 2156-97-0 |
| THFMA Monomer | Tetrahydrofurfuryl methacrylate | 2455-24-5 |
| PHEA Monomer | 2-PHENOXYETHYL ACRYLATE | 48145-04-6 |
| LMA Monomer | Lauryl methacrylate | 142-90-5 |
| IDA Monomer | Isodecyl acrylate | 1330-61-6 |
| IBOMA Monomer | Isobornyl methacrylate | 7534-94-3 |
| IBOA Monomer | Isobornyl acrylate | 5888-33-5 |
| EOEOEA Monomer | 2-(2-Ethoxyethoxy)ethyl acrylate | 7328-17-8 |
| Multifunctional monomer | ||
| DPHA Monomer | Dipentaerythritol hexaacrylate | 29570-58-9 |
| DI-TMPTA Monomer | DI(TRIMETHYLOLPROPANE) TETRAACRYLATE | 94108-97-1 |
| Acrylamide monomer | ||
| ACMO Monomer | 4-acryloylmorpholine | 5117-12-4 |
| Di-functional Monomer | ||
| PEGDMA Monomer | Poly(ethylene glycol) dimethacrylate | 25852-47-5 |
| TPGDA Monomer | Tripropylene glycol diacrylate | 42978-66-5 |
| TEGDMA Monomer | Triethylene glycol dimethacrylate | 109-16-0 |
| PO2-NPGDA Monomer | Propoxylate neopentylene glycol diacrylate | 84170-74-1 |
| PEGDA Monomer | Polyethylene Glycol Diacrylate | 26570-48-9 |
| PDDA Monomer | Phthalate diethylene glycol diacrylate | |
| NPGDA Monomer | Neopentyl glycol diacrylate | 2223-82-7 |
| HDDA Monomer | Hexamethylene Diacrylate | 13048-33-4 |
| EO4-BPADA Monomer | ETHOXYLATED (4) BISPHENOL A DIACRYLATE | 64401-02-1 |
| EO10-BPADA Monomer | ETHOXYLATED (10) BISPHENOL A DIACRYLATE | 64401-02-1 |
| EGDMA Monomer | Ethylene glycol dimethacrylate | 97-90-5 |
| DPGDA Monomer | Dipropylene Glycol Dienoate | 57472-68-1 |
| Bis-GMA Monomer | Bisphenol A Glycidyl Methacrylate | 1565-94-2 |
| Trifunctional Monomer | ||
| TMPTMA Monomer | Trimethylolpropane trimethacrylate | 3290-92-4 |
| TMPTA Monomer | Trimethylolpropane triacrylate | 15625-89-5 |
| PETA Monomer | Pentaerythritol triacrylate | 3524-68-3 |
| GPTA ( G3POTA ) Monomer | GLYCERYL PROPOXY TRIACRYLATE | 52408-84-1 |
| EO3-TMPTA Monomer | Ethoxylated trimethylolpropane triacrylate | 28961-43-5 |
| Photoresist Monomer | ||
| IPAMA Monomer | 2-isopropyl-2-adamantyl methacrylate | 297156-50-4 |
| ECPMA Monomer | 1-Ethylcyclopentyl Methacrylate | 266308-58-1 |
| ADAMA Monomer | 1-Adamantyl Methacrylate | 16887-36-8 |
| Methacrylates monomer | ||
| TBAEMA Monomer | 2-(Tert-butylamino)ethyl methacrylate | 3775-90-4 |
| NBMA Monomer | n-Butyl methacrylate | 97-88-1 |
| MEMA Monomer | 2-Methoxyethyl Methacrylate | 6976-93-8 |
| i-BMA Monomer | Isobutyl methacrylate | 97-86-9 |
| EHMA Monomer | 2-Ethylhexyl methacrylate | 688-84-6 |
| EGDMP Monomer | Ethylene glycol Bis(3-mercaptopropionate) | 22504-50-3 |
| EEMA Monomer | 2-ethoxyethyl 2-methylprop-2-enoate | 2370-63-0 |
| DMAEMA Monomer | N,M-Dimethylaminoethyl methacrylate | 2867-47-2 |
| DEAM Monomer | Diethylaminoethyl methacrylate | 105-16-8 |
| CHMA Monomer | Cyclohexyl methacrylate | 101-43-9 |
| BZMA Monomer | Benzyl methacrylate | 2495-37-6 |
| BDDMP Monomer | 1,4-Butanediol Di(3-mercaptopropionate) | 92140-97-1 |
| BDDMA Monomer | 1,4-Butanedioldimethacrylate | 2082-81-7 |
| AMA Monomer | Allyl methacrylate | 96-05-9 |
| AAEM Monomer | Acetylacetoxyethyl methacrylate | 21282-97-3 |
| Acrylates Monomer | ||
| IBA Monomer | Isobutyl acrylate | 106-63-8 |
| EMA Monomer | Ethyl methacrylate | 97-63-2 |
| DMAEA Monomer | Dimethylaminoethyl acrylate | 2439-35-2 |
| DEAEA Monomer | 2-(diethylamino)ethyl prop-2-enoate | 2426-54-2 |
| CHA Monomer | cyclohexyl prop-2-enoate | 3066-71-5 |
| BZA Monomer | benzyl prop-2-enoate | 2495-35-4 |