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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| 聚硫醇/聚硫醇 | ||
| DMES 单体 | 双（2-巯基乙基）硫醚 | 3570-55-6 |
| DMPT 单体 | THIOCURE DMPT | 131538-00-6 |
| PETMP 单体 | 季戊四醇四(3-巯基丙酸酯) | 7575-23-7 |
| PM839 单体 | 聚氧（甲基-1,2-乙二基） | 72244-98-5 |
| 单官能团单体 | ||
| HEMA 单体 | 甲基丙烯酸 2-羟乙基酯 | 868-77-9 |
| HPMA 单体 | 甲基丙烯酸羟丙酯 | 27813-02-1 |
| THFA 单体 | 丙烯酸四氢糠酯 | 2399-48-6 |
| HDCPA 单体 | 氢化双环戊烯丙烯酸酯 | 79637-74-4 |
| DCPMA 单体 | 甲基丙烯酸二氢双环戊二烯酯 | 30798-39-1 |
| DCPA 单体 | 丙烯酸二氢双环戊二烯酯 | 12542-30-2 |
| 二氯丙烯酰亚胺单体 | 甲基丙烯酸二环戊氧基乙酯 | 68586-19-6 |
| DCPEOA 单体 | 丙烯酸二环戊烯基氧基乙基酯 | 65983-31-5 |
| NP-4EA 单体 | (4) 乙氧基化壬基酚 | 50974-47-5 |
| LA 单体 | 丙烯酸十二烷基酯/丙烯酸十二烷基酯 | 2156-97-0 |
| THFMA 单体 | 甲基丙烯酸四氢糠酯 | 2455-24-5 |
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| IBOA 单体 | 丙烯酸异冰片酯 | 5888-33-5 |
| EOEOEA 单体 | 2-(2-乙氧基乙氧基)丙烯酸乙酯 | 7328-17-8 |
| 多功能单体 | ||
| DPHA 单体 | 双季戊四醇六丙烯酸酯 | 29570-58-9 |
| DI-TMPTA 单体 | 二（三羟甲基丙烷）四丙烯酸酯 | 94108-97-1 |
| 丙烯酰胺单体 | ||
| ACMO 单体 | 4-丙烯酰基吗啉 | 5117-12-4 |
| 双功能单体 | ||
| PEGDMA 单体 | 聚乙二醇二甲基丙烯酸酯 | 25852-47-5 |
| TPGDA 单体 | 三丙二醇二丙烯酸酯 | 42978-66-5 |
| TEGDMA 单体 | 三乙二醇二甲基丙烯酸酯 | 109-16-0 |
| PO2-NPGDA 单体 | 丙氧基新戊二醇二丙烯酸酯 | 84170-74-1 |
| PEGDA 单体 | 聚乙二醇二丙烯酸酯 | 26570-48-9 |
| PDDA 单体 | 邻苯二甲酸二乙二醇二丙烯酸酯 | |
| NPGDA 单体 | 新戊二醇二丙烯酸酯 | 2223-82-7 |
| HDDA 单体 | 二丙烯酸六亚甲基酯 | 13048-33-4 |
| EO4-BPADA 单体 | 乙氧基化 (4) 双酚 A 二丙烯酸酯 | 64401-02-1 |
| EO10-BPADA 单体 | 乙氧基化 (10) 双酚 A 二丙烯酸酯 | 64401-02-1 |
| EGDMA 单体 | 乙二醇二甲基丙烯酸酯 | 97-90-5 |
| DPGDA 单体 | 二丙二醇二烯酸酯 | 57472-68-1 |
| 双-GMA 单体 | 双酚 A 甲基丙烯酸缩水甘油酯 | 1565-94-2 |
| 三官能单体 | ||
| TMPTMA 单体 | 三羟甲基丙烷三甲基丙烯酸酯 | 3290-92-4 |
| TMPTA 单体 | 三羟甲基丙烷三丙烯酸酯 | 15625-89-5 |
| PETA 单体 | 季戊四醇三丙烯酸酯 | 3524-68-3 |
| GPTA ( G3POTA ) 单体 | 丙氧基三丙烯酸甘油酯 | 52408-84-1 |
| EO3-TMPTA 单体 | 三羟甲基丙烷三丙烯酸乙氧基化物 | 28961-43-5 |
| 光阻单体 | ||
| IPAMA 单体 | 2-异丙基-2-金刚烷基甲基丙烯酸酯 | 297156-50-4 |
| ECPMA 单体 | 1-乙基环戊基甲基丙烯酸酯 | 266308-58-1 |
| ADAMA 单体 | 1-金刚烷基甲基丙烯酸酯 | 16887-36-8 |
| 甲基丙烯酸酯单体 | ||
| TBAEMA 单体 | 2-(叔丁基氨基)乙基甲基丙烯酸酯 | 3775-90-4 |
| NBMA 单体 | 甲基丙烯酸正丁酯 | 97-88-1 |
| MEMA 单体 | 甲基丙烯酸 2-甲氧基乙酯 | 6976-93-8 |
| i-BMA 单体 | 甲基丙烯酸异丁酯 | 97-86-9 |
| EHMA 单体 | 甲基丙烯酸 2-乙基己酯 | 688-84-6 |
| EGDMP 单体 | 乙二醇双(3-巯基丙酸酯) | 22504-50-3 |
| EEMA 单体 | 2-甲基丙-2-烯酸 2-乙氧基乙酯 | 2370-63-0 |
| DMAEMA 单体 | 甲基丙烯酸 N,M-二甲基氨基乙酯 | 2867-47-2 |
| DEAM 单体 | 甲基丙烯酸二乙氨基乙酯 | 105-16-8 |
| CHMA 单体 | 甲基丙烯酸环己基酯 | 101-43-9 |
| BZMA 单体 | 甲基丙烯酸苄酯 | 2495-37-6 |
| BDDMP 单体 | 1,4-丁二醇二（3-巯基丙酸酯） | 92140-97-1 |
| BDDMA 单体 | 1,4-丁二醇二甲基丙烯酸酯 | 2082-81-7 |
| AMA 单体 | 甲基丙烯酸烯丙酯 | 96-05-9 |
| AAEM 单体 | 甲基丙烯酸乙酰乙酰氧基乙基酯 | 21282-97-3 |
| 丙烯酸酯单体 | ||
| IBA 单体 | 丙烯酸异丁酯 | 106-63-8 |
| EMA 单体 | 甲基丙烯酸乙酯 | 97-63-2 |
| DMAEA 单体 | 丙烯酸二甲胺基乙酯 | 2439-35-2 |
| DEAEA 单体 | 2-(二乙基氨基)乙基丙-2-烯酸酯 | 2426-54-2 |
| CHA 单体 | 丙-2-烯酸环己基酯 | 3066-71-5 |
| BZA 单体 | 丙-2-烯酸苄酯 | 2495-35-4 |