Many producers may face a problem: how to have screen printing ink components assembled on the product? Compared with the traditional approach is to use screw or rivet, but it is on the current efficiency of be particular about beauty and industrial markets, seems to be hold, so some manufacturers will use double-sided adhesive tape, it left in addition to the screw hole inconvenience, but there have been some unnecessary loss of adhesive tape, especially applied in have a parts through the window; Then, emerging on the market a kind of screen printing glue, screws and tape not only makes up for the deficiency, can help manufacturers to reduce production costs.
The following is the use of screen printing glue technology, selection, mesh selection of glue and glue thickness, printing design, introduce the glue dry, etc.
(a) use of technology
Use screen printing glue principle is very simple, just like ink screen printing, screen printing glue through silk screen printing technology, will glue accurately coated on the substrate to joint, after waiting for glue to dry up, it will produce a layer of nonstick coating like a tape, then can be real time bonding to the substrate, on the other side or mounted a layer from the paper, in order to use in the future.
(2) choose screen printing glue
Now most of the silk screen panels or panel, with plastic, such as polyester, PVC, ABS, PC film to give priority to. Use glue to paste the screen printing of plastic, must choose no corrosive glue, so as not to damage the plastic surface erosion or screen printing inks, water-based glue is the best choice. Water-based glue has a benefit, it is containing no organic solution, will not release harmful gases, and does not burn, is not in danger of fire and other environmental damage, the valid standards and the ISO14000 environmental protection industry today. Convenient and safe in storage.
(3) the selection of wire mesh and the thickness of the glue
Screen printing glue to glue the location and weight of greatly depends on the selection and design of silk screen design. Current vendors are usually use polyester or nylon net yarn, take its economy and high resistance to water, also have manufacturers adopt stainless steel net yarn, in order to obtain a precise, uniform and high stability.
Screen printing after the glue dry thickness and can also according to choose the coated area respectively gauze element type and mesh.
Usually, after the glue dries up half of the thickness is about when wet. Now most of the printing factory to choose # 23 and # 39 (cm) or 60-100 mesh (inch), but if you want to achieve more accurate and clear pattern printing effect, you can choose a higher number of mesh. However, high density of mesh, printed by the glue thickness is relatively thin. As for the thickness of the glue, in the surface roughness of the substrate will be thicker, smooth surface of the substrate can make glue thin. Generally, the thickness of the screen printing glue will be affected by the following factors:
1. The screen mesh
2. The thickness of the sealing retinal/plasma
3. Printing pattern designs
4. Glue the solids
5. The adhesive of the glue
6. The speed of screen printing
7. The stencil's point of view
8. Rubber hardness of scraping
9. The surface of the substrate
(4) printing pattern design
General printing patterns available flooded immersion (commonly known as the earth) printing, is screen printing the pattern on the substrate. If you want to print design is more complex, or the glue to seal a bit thicker, we can use linear (commonly known as zebra crossing) or dot (commonly known as checkered) printing.
(5) screen printing glue dry
Dry water-based screen printing glue sex is influenced by temperature increase and accelerate, SP7533 screen printing glue, for example, if you use 100 # steel nets, drying time at room temperature for about 30 minutes, about 15 minutes under 50 ℃, screen printing, also can use infrared lamp or the glue dries up with hot air conveyor belt; Dry speed also have deviation due to different substrate.
The easiest way to identify whether screen printing glue dries up, from the color change, SP7533 screen printing after the glue dry film color will become transparent. (Gold Printing Group)