How to deal with cracks in the acrylic sheet after painting

The recycled material is more soluble in the organic solvent than the new material sheet, so that the silver wire crack often appears in the paint after engraving. The general solution is as follows:
1. Acrylic pigments (resins) are used, which can be purchased by general art shops;
2. the choice of amino paint, general chemical stores can buy;
3. After the paint is filled, it is polished.
For the slight scratch or less obvious damage treatment on the surface of acrylic (plexiglass), sandpaper is generally used for wet grinding. When sanding, the sandpaper should be moved in a circular motion. The fineness of the sandpaper should be gradually increased to more than 600 mesh. Finally, toothpaste can be used. Grind it.
When the board is static, it is easy to adhere to dust. Before silk screen or paint, wipe it with a soft cloth dampened with 1% soapy water to achieve a clean effect. The bonding of the acrylic sheet of acrylic sheet is a very important process in the processing of acrylic products.
How to show the clear and transparent characteristics of acrylic, reflect the value of acrylic crafts, maximize the grade and taste of acrylic crafts, bonding technology has played a decisive role. Acrylic adhesion accepts two aspects: the applicability of the adhesive itself and the bonding skills.
At present, there are many kinds of adhesives in the domestic market, mainly two types, one is two-component, such as universal glue, epoxy resin; and the other is one-component, such as CCl3 (chloroform). Generally, the two-component adhesive is bonded by a curing reaction, and the one-component adhesive is a final volatilization of a solvent to achieve bonding.
The two-component adhesive is characterized by good bonding effect, no bubbles after bonding, no whitening, and high strength. The disadvantages are complicated operation, high difficulty, long curing time, slow speed, and difficulty in adapting to mass production.
The general one-component adhesive is characterized by high speed and can meet the process requirements of mass production. The disadvantage is that the bonded product is easy to generate bubbles, easy to be white, and has poor weather resistance, thereby directly affecting the acrylic products. The external beauty and product quality, therefore, in the processing of acrylic products, how to choose the appropriate adhesive, improve the grade and grade of acrylic products, is a big problem that must be solved first in the bonding process.
In addition, the bonding technique is also very important. There are several common bonding processes: butt joint, fa?ade bonding, bevel bonding, and surface bonding.
Temperature: It will soften when heated to above 100 degrees, and should be avoided at temperatures above 100 degrees.
Crack: The surface hardness of acrylic is equivalent to aluminum. Pay attention to the surface protection when handling. In the event of damage, polishing with a yellow aluminum abrasive can easily restore the surface.
Wipe: To keep the contents crystal clear, wipe with 1% soapy water with a soft cloth.
Thermal expansion: The coefficient of thermal expansion of acrylic is large. When placing or fixing, temperature changes should be considered to leave room for expansion and contraction.

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