2024 Author: Beatrice Philips | [email protected]. Last modified: 2024-01-18 12:09
Plywood is one of the most popular materials today. This material is versatile, durable and versatile. Sanded plywood is one of the most useful as it is suitable for a wide variety of applications.
Advantages and disadvantages
The most popular is birch plywood. These are sheets glued from veneer strips . Their number is from 3 to 5. Sanded plywood is characterized by high moisture resistance due to the presence of glue, phenol-formaldehyde resin in it. Sanded plywood is cleaned of dirt, scratches, irregularities. Due to the fact that the material is multilayer, it is stronger and more durable.
Thus, sanded plywood is of a higher quality, but due to the longer processing time, its price is higher than that of unpolished sheet . The main advantage of sanded plywood is its wide range of applications due to its strength, smoothness and variety.
Depending on the type and grade, the material will differ in cost. The advantages and disadvantages of the material, in this case, depend on the purpose of the application.
Sanded plywood has the following advantages
- Aesthetic look . Smoothness and beautiful wood pattern. The material is used for elements accessible to the eye and does not require painting.
- Moisture resistance, strength . They are supported by the presence of glue and resins.
- Constant hardness of raw materials which allows you to make sheets of material thin or thick. The number of stripes per sheet is different.
Comparison with raw plywood
The technical features are the same for both materials, but there are a number of special features. This is due to differences in production technology and manifests itself in appearance. The difference lies in the following nuances.
- Surface treatment . The sanded board is smooth, not rough.
- Price . Unsanded, unprocessed plywood is cheaper, but only suitable for a variety of roughing jobs. If you process unpolished plywood yourself, then the equipment and labor costs will not be justified.
- Application . The ground material has a wide range of uses.
- Dimensions according to GOST number 3916.1-96 . With a thickness of 12 mm (9 layers), the deviation for the ground sheet is from 0.5 to 0.7 mm, and the thickness difference is 0.6 mm. For unpolished material - up to 0, 6–1, 1 mm and 1 mm, respectively.
Varieties
GOST distinguishes 5 grades of plywood, which differ in the quality of raw materials
- Variety E . This is the highest grade, the highest quality and most attractive in appearance. It does not have any unnecessary inclusions, except for minor or accidental ones. Normally, no more than 3 elements per sheet with an area of 1m2 are acceptable. The most expensive grade of plywood, which is good for any finishing work.
- 1st grade . Small inclusions, knots are allowed in it. Used for interior and exterior decoration.
- 2nd grade . Cracks up to 20 mm are possible, as well as small repair inclusions for sealing knots, wormholes are acceptable, light and dark cavities are not excluded, glue traces seepage within 2% of the entire area of the plywood sheet.
- 3rd grade . It has no restrictions on the number of cracks and knots of coniferous material. The largest possible knot diameter is up to 70 mm.
- 4th grade . Low quality and inexpensive plywood material. For its production, wood with multiple defects is used. Irregularities of the edges with deviations up to 0.5 mm are acceptable. They are used for packaging, making boxes and rough finishing.
Sanded plywood can be smooth on one or both sides. The choice depends on the area of use of the material.
Applications
All types of material are very popular in construction, renovation and arts and crafts. Materials differ mainly in the purpose of use. So, plywood, processed on both sides, is applicable for the following purposes.
- Furniture creation - stools, wardrobes, tables, shelves, etc. Plywood furniture is very common, as it is much cheaper than solid wood furniture, but at the same time it is beautiful and varied. Also, individual elements of upholstered furniture are also made of plywood.
- Decorative and applied arts. Various large and small souvenirs, carved elements, foundations for structures.
- Wall decoration. Plywood is a popular material for leveling the surface of walls, for subsequent painting.
- Finishing the floor before installing laminate, linoleum and other coatings. A fairly simple and inexpensive way to level the floor.
- Decoration of walls of transport and luggage parts.
Plywood without sanding on both sides is used for the following types of work
- Cladding, rough base for floors and walls. If the material is overlapped from above with a finishing coating, then in order to save money, it is precisely a board that is not sanded or sanded on one side is used.
- Making invisible pieces of furniture to save on material. For example, frames or back surfaces.
- For fencing or foundation formwork. Smooth, moisture resistant and durable material is ideal for such purposes.
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