What is the substrate of children's prints? What tools are used to describe it?

KT board can be used for children's printing, which is convenient and safe. Due to its soft texture,

You can use pencils, toothpicks, wooden sticks, etc.

KT board is a new type of material, which is made of PS particles foamed and coated with film. The plate is crisp, light, not easy to deteriorate and easy to process. It can be directly used in screen printing (screen printing board), painting (coating adaptability needs to be tested), laminating rubber painting and ink-jet printing, and is widely used in advertising display and promotion, architectural decoration, culture and art, packaging and so on.

In advertising, it is used as a lining for exhibition, display and announcement of product publicity information release, and is also widely used in screen printing, especially for large-scale unified publicity activities. Size: from 0.9m to 1.2m wide and generally 2.4m long.

Extended data

KT plate can be divided into cold composite and hot composite from mature production technology. The products produced by these two different technologies are called (cold composite plate) cold plate and (hot composite plate) hot plate.

The manufacturing process of cold plate is to foam the core first, but because the cold plate is mostly single-layer core, it needs secondary foaming. The thickness of the first foaming is generally about 3 mm, and the second foaming is needed after curing for half a month. Put the core on the equipment and foam it to about 5 mm After the second foaming, it can be glued directly.

But there is a problem here. Cold dishes often bubble. Why? Because the curing period of the core is too short, there is a problem with neutral glue or there is an error in gluing, and the plate is exposed to direct sunlight or ultraviolet rays after molding.

The production process of hot plate is to foam ps particles into a plate core of about 2mm with equipment. At this time, the core is a coiled material that is left at room temperature for almost half a month and then discharged from the core exhaust gas. Followed by veneer. That is, two rolls of stretched PS dough and two rolls of solidified board core are put on the equipment at the same time, and they are fused and glued together through the mold of the equipment to form the whole board.

Finally, the whole package is carried out, and the plate with good surface is cut into a certain length when it is on the equipment, and the production is completed. However, the hot plate also has foaming reasons, which are caused by three reasons: the curing period of the plate core is short, the PS surface is thin, and the glue on the back of the picture reacts with the PS surface.

1. cooling table

First, core foaming: the raw material is PS particles, but because the cold plate is mostly single-layer core, it needs secondary foaming. The thickness of the first foaming is generally about 3.5 mm After half a month of curing, the second foaming is needed. Put the core on the equipment and foam it to about 5.0-5.2 mm After the second foaming, it can be glued directly.

2.KT board

Then paste the dough: the base material of the dough is PVC, generally 0.08 m-0. 16mm. At present, 0.08-0. 1mm dough is mostly used for small plates of 0.9×2.4, and 0. 1.2× 2.4 dough is generally used for large plates of 1.6 mm to enhance the stiffness of the plate.

The dough and board core are coated with glue at the same time, and the paste must be extruded by a flat hydraulic press (10 ton or more), and it can be taken out, trimmed, packaged and shipped after more than 24 hours.

Step 3: Hot plate

(1) Foam PS particles into 2.5mm-3.0mm cores with equipment (primary foaming). At this time, the core is the coil, which is generally 500 meters. At this time, the core should be stored at room temperature for half a month (curing period) in order to discharge part of the waste gas in the core.

(2) Veneering

At the same time, two rolls of stretched PS dough and two rolls of solidified board core are placed on the equipment, and they are fused and bonded together through the mold of the equipment to form the whole board. The thickness of dough is about 0.01m.

4. The whole package

When the pasted board is placed on the equipment, it will be cut into 2.4m long, trimmed after cutting and packaged into a whole board of 0.9×2.4.

References:

Baidu encyclopedia -KT board