Sandpaper, a seemingly simple tool, carries a variety of complex technologies and applications. Let's take a deeper look and understand the different aspects of sandpaper.
1. Types
Sandpaper can be divided into two types: water sandpaper and dry sandpaper according to different usage methods.
Dry sandpaper: The abrasive is bonded to latex with synthetic resin as a binder and coated with an antistatic coating. It has the characteristics of anti-blocking, anti-static, good softness, high wear resistance, etc., and is suitable for dry grinding.
Water sandpaper (water-resistant sandpaper): Sandpaper with water-resistant paper or treated water-resistant paper as the base is called water sandpaper. It is usually made by firmly bonding the abrasive to the base with paint or resin as a binder. It is used to polish the surface of metal or non-metal workpieces in water or oil.
2. The influence of basis weight
The basis weight unit of sandpaper, such as AW is 65g/cm², directly affects its bendability, toughness and mechanical resistance. Sandpapers of different weights are AW (A base weight), CW, DW, EW, FW, etc. from light to heavy. AW is the lightest and is usually used for manual sanding; CW is suitable for manual sanding and light mechanical sanding (portable vibration sander); DW and above are for mechanical sanding; EW and FW are for heavy sanding. Different needs require different choices.
3. Raw materials
Dry sandpapers often use abrasives such as brown corundum, white corundum, and zirconium corundum. The advantages are high grinding efficiency and not easy to stick to chips, which is suitable for dry grinding; water sandpapers often use corundum or silicon carbide abrasives, which have a relatively fine texture and are suitable for grinding some things with a relatively fine texture and suitable for post-processing.
The choice of different types of sandpaper directly affects its performance in different environments.
4, Sandpaper Grit No.
Mesh number refers to the number of mesh holes per inch of the length range of the sieve mesh, also known as the sieve number or mesh number. Therefore, the more mesh holes (i.e., the smaller the mesh size), the larger the mesh number, which becomes an indicator of the fineness of abrasive material particles and indirectly a measure of the fineness of sandpaper. For example, 100 # sandpaper is sandpaper made of 100 grit abrasive, with a surface distribution of 150um abrasive particles.
The thickness of sandpaper and the type of abrasive have a significant impact on the purpose and effectiveness of sandpaper. Here are some common grit sizes of sandpaper and their corresponding uses:
40-60 mesh: This rough abrasive grain is suitable for removing large pieces of material from rough surfaces, such as removing old paint.
80-120 grit: These grit sizes of sandpaper are suitable for removing smaller defects, such as sharp edges or corners on wood or metal surfaces.
150-180 grit: This medium grit sandpaper can be used to polish surfaces to make them smooth, such as removing thick layers of paint or coating.
220-240 grit: This sandpaper can be used to remove minor surface defects and create a relatively smooth surface.
280-320 grit: This fine sandpaper is suitable for polishing and smoothing various surfaces of wood, metal, and plastic.
360-600 grit: This ultra-fine abrasive sandpaper can be used to remove minor scratches on the surface, resulting in a very smooth surface, such as when sandpaper is used to process car surfaces.
1000+grit: This extremely fine sandpaper can be used for the most delicate polishing work, such as polishing eyeglass lenses, metal and plastic surfaces, etc.
More information, contact us!
