Plywood is a multilayer material in the form of square plates, which is made by gluing several layers of wood veneer. It is widely used in construction, engineering, furniture manufacturing and other fields. Often ordinary consumers ask this question: "FSF plywood - what is it?" This product, its features, advantages will be discussed in this article.
Features of FSF Plywood
So, FSF plywood - what does it mean? F - plywood, SF - resin phenol-formaldehyde adhesive. This wood material is made from birch, coniferous or beech veneer. It has the properties of increased moisture resistance. Plywood consists of three or more layers of veneer glued with formaldehyde adhesive. She is characterized by dark red or dark brown adhesive layers between the plates, which are visible at the ends of the paintings.
FSF plywood, the technical characteristics of which allow its operation in any climatic conditions, is a natural material with a beautiful aesthetic appearance. It is used for construction and exterior decoration. It is not recommended to use the material inside residential premises, as it contains toxic substances.
Moisture resistant plywood can be made of coniferous species. According to production technology, coniferous veneer must be present in the outer layers. The inner plates may be hardwood. Such plywood is used in construction. It is resistant to decay, to fungi. FSF birch plywood is characterized by excellent quality, durability, wear resistance and high cost. All layers in this product are made of birch wood, it is 15-20% stronger and heavier than coniferous.
Tensile Strength of Moisture-Proof FSF Plywood:
- tensile is 40 MPa;
- at bending - 60 MPa;
- when chipping along the adhesive layer - 1.5 MPa.
Scope of application
FSF plywood, the technical characteristics of which are quite high, justifies its application in the field of electrical engineering, in the aviation industry, in construction, in car and car manufacturing. Use this material in the construction of frame structures, fences, formwork, in roofing. FSF 18 mm plywood is widely used for the manufacture of garden furniture, outdoor billboards, packaging and containers.
Plywood benefits
FSF plywood (what kind of material is written above in the article) has many advantages.
- Increased moisture resistance. Moisture or condensation does not affect its technical characteristics. However, it does not swell, does not stick and retains the strength properties.
- Resistant to mechanical damage. Due to their structure, plywood sheets withstand the effects of deformation on bending and tearing. This wood material is strong and durable.
- Simplicity and speed of installation. The material is easy to process, convenient, which contributes to simple and quick installation. You can fasten it with screws, screws, nails. It goes well with other synthetic or natural materials.
- Universality. Reliability, moisture resistance allow its use in various fields of application.
- Easy to handle. FSF plywood, although it has increased strength, is easily processed by tools. It lends itself well to grinding, drilling, cutting.
These indicators provide the popularity of plywood, its use in industry and construction.
FSF Plywood Disadvantages
- Toxicity. In the manufacture of plywood , carcinogenic components that affect human health are used. Indoor use of this material is not recommended.
- Combustibility The material is flammable.
Varieties of FS plywood
FS plywood can be divided into five grades: E (elite), 1, 2, 3, 4. The material is divided into categories based on the outer layers of the surface:
- E - perfect quality of the outer sheets;
- I (B) - product without visible defects;
- II (BB) - the absence of knots on a plywood sheet, the presence of black dots is permissible;
- ІІІ - (SR) defects can be sealed with veneer inserts;
- IV grade (C) - the presence of knots is permissible;
- SS is the lowest grade, veneer joints and other flaws are visible on the sides of the canvas.
According to the degree of surface treatment, FSF can be:
- NSh - unpolished;
- Sh or Sh 1 - with one-sided grinding;
- W or W 2 - with double-sided grinding.
An alphabetic symbol is added to the marking of the material and grade, which indicates the degree of processing of the sheet. In addition, the formaldehyde emission class must be indicated. They produce plywood of this type with a thickness of 4-40 mm. The dimensions of the FSF plywood canvas are: 1525x1525, 1220x2440, 1250x2500 mm.
How to distinguish FSF plywood from other types
If you do not know how plywood differs from other types of FSF, what kind of material it is, what its characteristics are, ask the seller-consultant or determine independently by its external signs. On the ends of the canvases between the layers of veneer are visible streaks of glue of a dark color. FC plywood, unlike FSF, has light yellow adhesive gaps.
Price
If you need moisture-resistant FSF plywood, the price of sheets of the same size and thickness can be different. Decide on the type of material first. The cost depends on the type of product and its manufacturer. The number of defects present on the surface of the outer layers of the material determines one or another sort of it. And, of course, the higher the grade, the more expensive the product. Since plywood has two outer sides, the variety is determined by double numbering, for example 2/4. In addition, each manufacturer of FSF plywood sets its prices for manufactured products. Therefore, the cost speaks little about the quality of the product.