Acrylic display shelf mainly reflects the quality through appearance inspection points such as transparency, brightness and surface finish, but some strength requirements are often ignored by ordinary buyers or users. The structural design and strength of acrylic display rack are very important, which is related to the loss and service life of display rack.

The surface hardness and toughness of acrylic display stand are two important strength indexes. Hardness refers to the hardness of an object. Diamond is the hardest of natural materials and can be used to cut hard glass; Toughness refers to the ability of an object to return to its original state after deformation. Although diamonds are hard, they have low toughness and are easy to break. Acrylic display rack has low hardness but good toughness. After heating, its bending capacity is stronger than that of glass, but its surface is not as hard as tempered glass.

What is the relationship between the hardness and toughness of acrylic display rack and quality? The higher the surface hardness of acrylic display frame, the higher the scratch resistance; The better the toughness, the less likely it is to break down. If some inferior acrylic display racks are processed with recycled materials, they will age and turn yellow, and the toughness of the products is very poor. With a little effort, they will break and can't stand falling. Hardness is one of the hard indexes to evaluate the quality of acrylic display shelf. Compared with the acrylic display frame produced by extrusion method, the hardness index of acrylic display frame produced by casting method is higher, with an average of 90 ° Rockwell hardness.

In addition to using professional Rockwell hardness tester, is there a simpler, more intuitive and more life-oriented method to detect surface hardness? In fact, many factories do not use professional hardness tester to accurately detect the surface hardness of acrylic display rack, but use a relatively simple comparison method: draw a horizontal line with a force of about 1kg on the surface of acrylic display rack with a pencil and wipe it with an eraser to see if there are obvious traces on the surface. The surface hardness of acrylic display rack can be distinguished according to the label of pencil. The surface hardness of acrylic display rack is generally from low to high, and the surface hardness is 2B, 1b, Hb, h, 2h and 3H. The acrylic display rack with surface hardness of 3H can be achieved.