Analysis on the attention of resin protective glue
The new type of polymer protective glue has the bidirectional function of ink extraction and sealing different from that of gum arabic. The colloid made of it is transparent, odorless, not easy to rot, and does not precipitate. Its compactness is similar to "plastic film", which has a strong The gas barrier.
Some protective adhesives have an oxygen and nitrogen permeability of almost zero at 25 ° C. They are corrosion-resistant, solvent-resistant, and have high tensile strength. They dissolve in water and are easy to open by hand and by machine. normal.
Some protective adhesives have an anti-oxidation rate of 99.7%, and the loss of the cover plate is less than three thousandths. They can be used and stored within the range of -20 ° C to 140 ° C, without gel layering or precipitation, and without cracking after the cover plate.
However, the quality of polymer protective adhesives produced by different manufacturers varies greatly, and the film-forming properties, viscosity, odor, shelf life, water solubility, etc. should be investigated, and the best protective adhesive should be selected. Long printing house. At present, the customers of Fuji, Nikken, Wannbao, and Speedmaster multi-protection adhesives sold on the market have received good feedback.
Properly apply protective glue
Check whether the quality of the protective glue is good or not. Prepare a certain concentration of protective glue as required, and then check whether the pH and viscosity of the protective glue are appropriate.
Concentration ratio: Under normal circumstances, the concentration is proportional to the viscosity.
Because manual gluing is thicker, the spot concentration can be lowered compared to machine gluing.
Hand glue
Glue the newly produced PS version:
â’ˆAfter development, rinse both sides of the plate with water
â’‰ Dirty
â’ŠRinse the dirty parts with water
â’‹Wipe away too much water from the layout, or dry it with the wind
â’ŒPour glue on the surface of the plate, and evenly rub the entire plate with water bubbles, pay special attention to the glue on the blank part
â’Place to dry completely, store in a cool and dark place for future use
Do not mix the cloth or blisters used in the above steps
Retain
â’ˆUse gasoline or running water to wash off the ink on the layout
â’‰Clean the plate with cleaning solution or wetting powder
â’ŠFlush the layout with water
â’‹Wipe away too much water from the layout, or dry it with the wind
â’ŒPour glue on the surface of the plate, and evenly rub the entire plate with water bubbles, pay special attention to the glue on the blank part
â’Place to dry completely, store in a cool and dark place for future use
Do not mix the cloth or blisters used in the above steps
On-board glue
Regularly check the gluing roller for aging and replace it in time
Always check whether the water in the water tank has entered the glue tank. This will reduce the concentration of the protective glue and get dirty during printing.
Drying temperature is set at about 60 ℃
Always clean the air circulation filter to ensure even coating of glue
Precautions for using protective glue
The protective glue is too thick or the coating is too thick: it is difficult to clean during printing, which in turn causes difficulty in inking the graphics and text and smearing the blank part;
The protective glue is too thin or the coating is too thin: it does not play a protective role, the printing is dirty, and sometimes it is seriously dirty. The layout is easy to scratch.
Using modified protective glue, it is difficult to remove during printing, and reduce the adhesion of the photosensitive layer on the PS plate, the plate is dropped, and the oxide layer falls off in severe cases.
For the large-scale text on the surface of the layout, the concentration of the protective glue can be appropriately reduced (the protective glue attached to the graphic part is more difficult to clean than the blank part)
When the protective glue is not dry, do not touch the layout in the printing area with your hand to prevent fingerprints from being printed on the printed matter
The protective glue is harmful to the human body. Pay attention to safety when using it. Do not let the protective glue touch the skin and clothing. Do not splash it into your eyes.
Child proof glass jars with lids,Child resistant Flower Jar ,Child resistant packaging ,Glass jar child proof ,Glass storage jar ,Glass jars with lids
NANTONG OUFEIYA IMP& EXP CO.,LTD , https://www.zjnantongoufeiya.com