Most of the processes commonly used in medical tubes are offset printing, screen printing and hot embossing.
Common medicinal tube printing process is: dust removal surface pretreatment-printing (UV ink) _ glass varnish Uv curing. A dedicated tube printer can basically complete the above process.
1. Manufacturing process of medicinal tube-dust removal:
A common problem with plastic materials is that they are relatively easy to generate static electricity. In the process of producing the tube, the raw material is always in frictional contact with the metal mold, thereby generating static electricity on the surface of the tube, which makes the surface of the tube easy to absorb dust. Therefore, it is necessary to remove dust during the printing process.
2. Manufacturing process of medicinal tube-surface pretreatment:
Since the polyethylene raw material is a non-polar material, surface pretreatment is required before printing. There are two main treatment methods, one is corona treatment and the other is flame treatment. Both of these methods can achieve the purpose of making the ink and varnish adhere firmly.
3. Manufacturing process of medicinal tube — Printing:
At present, there are two commonly used printing methods for plastic tubes. -The kind is offset printing. The ink is transferred to the printing plate through a set of ink rollers, and the printing plate transfers the ink on the printing pattern to the blanket. Then, the blanket transfers the entire printed pattern to the substrate at a time.
Offset printing plates are usually made of light-curable resin plate materials, which are made through the main exposure, development, cleaning, drying and post-exposure processes. The production time of the printing plate is about 30-40 minutes, and the printer’s durability can reach 00,00).
At present, the speed of offset printing can reach 2000 per hour, and the operation process has become easier and simpler. The increase in the production speed of offset printing and the reduction in cost have made offset printing widely used in tubular printing.
Another method of tube printing is traditional screen printing.
In recent years, the printing accuracy and printing speed of household screen printers have been greatly improved.
The production speed can reach 5000 small
When, the overprint accuracy can reach 0.2mm. Because the ink layer of screen printing is thicker, it is mainly used for color. Print tube or part of uncovered varnish product.
4. Manufacturing process of medicinal tube-coating:
A set of coating device is installed on the offset printing machine, which is composed of two steel rollers and a rubber roller. The adhesion fastness of varnish is also directly related to the tension of the plastic surface after pretreatment. Varnishes are usually UV-curable varnishes, and there are many types, such as gloss oil and matte oil. In addition, there are thermosetting varnishes and three-in-one varnishes for glazing after offset printing.
5. Medicinal tube production process one–varnish curing:
For uv curing varnish, the degree of curing of the varnish has a great relationship with the wavelength and ultraviolet intensity emitted by the uv lamp. For products that have undergone subsequent processing (such as hot stamping), the degree of curing of the varnish will have a significant impact on the quality of the subsequent addition of T.
Medicinal tube production process-hot embossing:
A layer of hot embossed paper is embossed on it, so the silk screen will not feel uneven. The hot stamping process is mainly divided into several parts: the preparation before hot stamping, the hot stamping plate, the installation of the plate, the determination of the hot stamping process parameters, the hot stamping test and the formal hot stamping.
Post time: Sep-24-2021