What is a plastic cap? It must be clear to all of us that we can see the appearance of plastic bottle cap, whether it is the soda we drink or the washing liquid at home. Its function is great. So what else do you not know enough about it? Now we will learn more about "the precautions of printing plastic bottle caps and the science popularization of relevant common sense".
Introduction to plastic bottle caps
Several points to pay attention to printing plastic bottle cap of pad printing machine. When printing plastic bottle cap, check whether several pad printing accessories are normal. When selecting, pay attention to size, color and image alignment.
1. Rubber head
At present, domestic generally do not pay attention to the selection of rubber head, but in pad printing, the selection of rubber head should be very strict. In the bottle cap pad printing, the circular rubber head is widely used. When selecting the rubber head, the following two points should be paid attention to.
(1) In the printing process of halftone image, the hardness and shape of the adhesive head for yellow, magenta and cyan should be the same, and the hardness of the adhesive head for black can be slightly higher.
(2) choose the adhesive head with good film removal. This kind of adhesive head can improve the printing quality of PP and PE surface by using the essence of offset printing rubber cloth.
2. Ink
In plastic bottle cap pad printing, the choice of ink is very important. Bottle caps are basically made of PP and PE materials, and the selected ink must match the type of substrate material. When choosing ink, we should pay attention to the following two points.
(1) Choose pad printing ink instead of screen printing ink. Screen printing ink has better leveling property, while pad printing ink has better colloidal property; the drying speed of screen printing ink is relatively slow, and the drying speed of pad printing ink is faster.
(2) Some inks add hardener to improve the adhesion, but increase the difficulty of operation, so unless the customer has special requirements, it is recommended not to use this method.
Although solvent based screen printing ink can be used for pad printing, its effect is not as good as special pad printing ink. If you need to use UV ink, you should not choose screen printing UV ink, because screen printing UV ink transfer is too poor. If you must use screen printing UV ink, you should add a certain amount of gelatinizer.
3. Printing plate
Resin intaglio is a wise choice for cap manufacturers who attach importance to pad printing quality. This plate is made of nylon polymer, without corrosion process, which is conducive to quality control. At present, resin gravure is widely used in pad printing machines in Europe and America.
4. Consideration on the cost of printing bottle cap of pad printing machine
The printing area of the bottle cap is very small, so some people think that there is no need to worry about its cost. However, with the aggravation of market competition, we should pay attention to reduce the cost. This is why many manufacturers use pad printing instead of flexographic printing in bottle cap printing.
knowledge of plastic bottle cap printing
1. Rubber head
At present, domestic generally do not pay attention to the selection of rubber head, but in pad printing, the selection of rubber head should be very strict. In the bottle cap pad printing, the circular rubber head is widely used. When selecting the rubber head, the following two points should be paid attention to.
(1) In the printing process of halftone image, the hardness and shape of the adhesive head for yellow, magenta and cyan should be the same, and the hardness of the adhesive head for black can be slightly higher.
(2) choose the adhesive head with good film removal. This kind of adhesive head can improve the printing quality of PP and PE surface by using the essence of offset printing rubber cloth.
2. Ink
In plastic bottle cap pad printing, the choice of ink is very important. Bottle caps are basically made of PP and PE materials, and the selected ink must match the type of substrate material. When choosing ink, we should pay attention to the following two points.
(1) Choose pad printing ink instead of screen printing ink. Screen printing ink has better leveling property, while pad printing ink has better colloidal property; the drying speed of screen printing ink is relatively slow, and the drying speed of pad printing ink is faster.
(2) Some inks add hardener to improve the adhesion, but increase the difficulty of operation, so unless the customer has special requirements, it is recommended not to use this method.
Although solvent based screen printing ink can be used for pad printing, its effect is not as good as special pad printing ink. If you need to use UV ink, you should not choose screen printing UV ink, because screen printing UV ink transfer is too poor. If you must use screen printing UV ink, you should add a certain amount of gelatinizer.
3. Printing plate
Resin intaglio is a wise choice for cap manufacturers who attach importance to pad printing quality. This plate is made of nylon polymer, without corrosion process, which is conducive to quality control. At present, resin gravure is widely used in pad printing machines in Europe and America.
4. Consideration on the cost of printing bottle cap of pad printing machine
The printing area of the bottle cap is very small, so some people think that there is no need to worry about its cost. However, with the aggravation of market competition, we should pay attention to reduce the cost. This is why many manufacturers use pad printing instead of flexographic printing in bottle cap printing.
The above introduction of "Introduction to the key points of knowledge about printing plastic bottle caps" and "understanding of printing knowledge of plastic bottle caps" can help you understand "matters needing attention in printing plastic bottle caps and popularization of relevant common sense".
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