About the hardness of plexiglass products，Acrylic products mainly reflect the pros and cons of quality through visual inspection points such as transparency, brightness, and surface finish, but some strength requirements are often ignored by ordinary buyers or users. How do we test the hardness of acrylic products?
The surface hardness and toughness of acrylic products are two more important strength indicators. The so-called hardness refers to the hardness of the object. Diamonds have the highest hardness among 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 hard, diamonds have low toughness and are easily broken. Acrylic products have low hardness, but good toughness. After heating, the bending ability is stronger than glass but the surface is not as tough as tempered glass.
What is the relationship between hardness and toughness and the quality of acrylic products? The higher the surface hardness of acrylic products, the higher the scratch resistance; the better the toughness, the more difficult it is to break. If some inferior quality acrylic products are used repeatedly and repeatedly If the aged and yellowed recycled materials are processed, the toughness of the product is very poor, and it will break with a little force, and it will not stand up. Hardness is one of the hard indicators to evaluate the quality of acrylic products. The acrylic products produced by the casting process have a higher hardness index than the acrylic products produced by the extrusion process, and can reach an average Rockwell hardness of 90 degrees.
In addition to using a professional Rockwell hardness tester, is there a simpler, more intuitive, and life-like test method? In fact, many factories do not use a professional hardness tester to accurately measure the surface hardness of acrylic products, but use comparison. Simple comparison method: use a pencil to draw a horizontal line on the surface of the acrylic product with a force of about 1KG, and then wipe it with an eraser to see if there are obvious traces on the surface. Use the pencil number to distinguish the hardness of the surface of the acrylic product and the surface of the acrylic product. The hardness from low to high is generally divided into 2B, 1B, HB, H, 2H, and 3H. Acrylic products that can reach a surface hardness of 3H are considered to be quite high hardness.