Sandpaper for wood: Types and application technology
- 01 Jul 03:30
- Repair Of
- 1 General Information
- 2 Types of Emulsions
- 2.1 Types of Abrasive
- 2.2 Application Technique
- 2.3 Grain
- 2.4 Marking
- 2.5 Resistance to Water
- 3 Conclusion
A wood shredder is an indispensable tool for wood processing, which has been known to mankind for a very long time. Currently, themarket presents a large range of products, which may complicate the choice of novice.
In this article, we will examine the existing types of sandpaper and its classification.
Sandpaper first appeared in China in the 13th century. In those days it was made from sand of seeds, shells and natural glue. True, the technology of its production was further developed only in the nineteenth century in England thanks to the inventor John Oakey.
It came up with the use of ground glass for the manufacture of sandpaper. As a result, nazhdachka began to be used for wet grinding, as well as polishing knives. Currently, there are m
Electric Stainless Steel Embroidery Type
Thus, the modern emery of wood differs according to the following features:
- The method of abrasive application;
- Production site, since some of its performance depends on it;
- Water Resistant.
Below, let's take a look at all its views.
Types of abrasive
Natural emery is the result of mixing magnetite with corundum. However, in modern terms, these materials are practically not used. The most common are the following types of abrasives:
Abrasive type Features Electro-corundum The most rigid form of the skin, which has excellent cutting ability, as well as resistance to pressure. This abrasive is obtained by reducing melting in the charge. Silicon carbide It is a very sharp, but at the same time, soft crumbles that crumble under pressure. Get this abrasive from an alloy of graphite and silica.
Such peel is more often used for metal and plastic processing. Pomegranate A rather fragile abrasive, but at the same time allows you to get a perfectly smooth surface. It is often used to handle a tree. Diamond is the most durable and durable type of abrasive, but at the same time its price is very high. Therefore, this sandpaper is not used to handle the tree.
Pay attention! In the market you can find sandpaper in rolls or chopped sheets. In addition, there is a skin on Velcro, which allows it to fasten it to the holder, for more comfortable work with their own hands.
Some properties of the skins depend on the method of applying abrasive.
At present, the following methods are most frequently used in production:
- Mechanical application of - under the action of forces of gravity of a particle in a chaotic manner, is applied to a cloth.
- Electrostatic method - negatively charged particles in the electrostatic field are attracted to the adhesive base. The peculiarity of this method is that the emery layer turns out very sharp.
- By connecting - a material that is more durable than abrasive, serves as a connecting link between the cloth and the emery layer.
- With the use of glues and resins, the latter are not rarely equipped with anti-dirt and antistatic additives that increase the durability of the skins.
Pay attention! For matting surfaces, a special special fiberglass skin is used, which is a nonwoven fabric made of mesh and impregnated with abrasive and resins.
The grain density per square inch or, to put it simply, granularity of sandpaper differs in the following types:
Grain Scope 40-60 are spaced apart large grains. Such a peel is used when performing rough work.80-120 Used to remove minor irregularities. Therefore, such nazhdachku is also called smoothing.150-180 Used for finishing treatment.220-240 Used for grinding before painting.280-320 Perfect for removing traces before painting.360-600 Applies to grinding.
Thus, choosing which grinder to polish a tree should be guided by the type of processing. However, in any case, the fine wood for processing the tree is not used, as it quickly clogs up.
Stainless Steel Soda Marking
Marking depends on the country in which sandpaper is made, as each country has its own system-forming base.
Allocate the following foreign groups:
In addition, there is a standard standard FEPA that meets the Russian standard. This system is based on determining the number of grains, which can be from 12 to 5000. The more grains, the less grain is the skin.
For example, the skin P22 /24/ 36 is intended for rough processing, since it contains large grains, and sandpaper for P240 / 280 grade wood is used for grinding wooden surfaces. The P2000 / 2500 brand is used to polish paint and varnish coatings.
One more important parameter of the skin is water resistance. It should be noted that moisture resistant sandpaper is often used for woodworking in industrial environments, in particular for the manufacture of furniture.
This consumable material is also characterized by increased elasticity due to the use of fabric base and special resins. Specialists recommend that it be soaked in water for a while before using it. However, it should be borne in mind that the instruction on the use of sandpaper in many respects depends on the type of operation performed.
At sale, the waterproof skin comes in grains within P80 - P2000.That is, it can be used at all stages of surface treatment.
Here are probably all the main types of sandpaper, which you can find the most suitable skin for doing some kind of wood work.
For the processing of wooden surfaces, not all types of sandpaper are suitable, in particular fine-grained skins are not used, except for the treatment of paint coatings. The most conducting is a nashadkach P240-280 with a pomegranate abrasive.
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