1. Plywood, also known in the market as rubber plywood, is a product made by the combination of thin veneers and glued together. The thin plank is made by peeling the wood surface into a large round piece of wood. And each sheet is baked and rolled to dry completely. Therefore assemble next to each other in layers With glue to produce a veneer The different types of adhesives that affect the use of plywood. For example, common plywood used to make indoor furniture usually use normal Urea Formaldehyde adhesive. Or construction work that needs to be exposed to moisture, often use waterproof glue
   
   The veneer is dense. Beautiful smooth surface suitable for use in furniture production, the exterior of which must show the beautiful smoothness of the wood. That plywood sheet It can be divided into different types according to the application, such as plywood, cladding, decorative veneer. Construction plywood Furniture grade plywood

2. Particle Board is made from small pieces of wood. The remainder of the wood sawing process was then crushed and pressed together with glue. Due to the manufacturing nature of small pieces of wood pressed together, the wood of the particle board is not as dense. And lightweight Therefore not able to support much weight And due to its rough and perforated wood, it is not suitable for nail bonding. Can not decorate the edge Or make a slit tongue on the skin But at a cheaper price than other types of plywood Particles are often used to produce affordable furniture. Currently, particle boards on the market are sold both bare And covered with various materials For example, melamine-covered partitions Particle Covered Wood Veneer
3. Fiber Board is made from the use of firewood, twigs, or the end of the tree with high fibers and crushed into fibers. Then pressed with heat to form a wood sheet with glue In Thailand, most of them use raw materials from rubber and eucalyptus trees as their main raw materials. Fibreboards can be divided into two types of densities:
   
   1. Medium Density Fiber Board or MDF board It is a wood-based panel that is most similar to natural wood and can be used for a variety of purposes. Especially in the production of furniture Because it has the properties that are the most like real wood MDF boards can also cover the surface and back with different materials. For beauty and strength, PTK Wood has produced a wide variety of MDF products covered with natural veneer for beauty.
   2. High Density Fiber Board is similar to MDF board. But has a higher density Therefore can bear higher pressure With a density greater than 800 kilograms per cubic meter or more Suitable for use with work that requires a lot of weight and requires the strength of high wood such as floor, house, etc.

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Nowadays, we often hear him that E0 glue plywood or E1 glue type MDF board. Today, PTK Wood will explain that different types of glue. What are these And why are they used in various setting works
First of all, it must be understood that plywood And other wood composites and wood composites, such as particle board and MDF board, are produced using wood materials, either in a thin layer in a plywood case. Or wood pulp in the MDF case is extruded with glue by heat and pressure The most common glues used in the production of these wood are urea formaldehyde (Urea Formaldehyde) or melamine formaldehyde (Melamine Formaldehyde) glue. This evaporation of formaldehyde has effects on the health of both the manufacturer and the product user. Most often found that Exposure to formaldehyde It is in the form of inhaling formaldehyde vapors or touching the skin and eyes. By those who inhale Or touch will show symptoms such as burning eyes, stinging, throat stinging, nose irritation, etc.

Nowadays, although formaldehyde is used in the manufacture of a wide variety of products in our daily life such as Used in the fabric and textile industry It is used as a fabric detergent in the production process of finished fabrics so that the fabric will not be wrinkled or wrinkled Or used to make fabric dye, use of tanning, medicine, skin care, nail polish or as a mixture of surface coatings And paints for furniture and various cabinets, but the plywood industry in many countries has taken into account the health of both plywood manufacturers and users. Therefore a standard for controlling the level of formaldehyde in plywood And wood panels to replace other natural wood Containing glue The name of the standard level is different for each country.

In the United States, California Air Resources Board (CARB) has made a requirement to reduce the amount of formaldehyde evaporated from indoor composite panels such as veneer. And MDF discs The specification is divided into two periods: Phrase 1 and Phrase 2, which began in 2010, and now this standard is often referred to as CARB p2 or CARB phrase 2 itself.
The table below shows the requirements. Formaldehyde level in each type of composite plank The veneer made from HWPW-VC (hardwood plywood veneer core) veneer must have a formaldehyde level not exceeding 0.05 ppm. At present, PTK Wood has produced products. Both types of plywood are HWPW-VC and HWPW-CC for export to USA. And sold to customers interested in this standard product With a certificate to assure customers that our products have passed the CARB p2 requirements.

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TIS plywood is divided into 4 types according to the glue used in production. With different categories as follows

1. External type uses an adhesive that is resistant to weather, cold water, boiling water, steam and dry heat, suitable for use outdoors or where exposed to water or spray.
2. Moisture resistant type Use an adhesive that is resistant to weather, cold, boiling water, steam for a limited time, suitable for indoor and outdoor use, or where occasionally exposed to water or spray.
3. Internal type uses a fairly good cold-resistant glue. Durable in hot water For a limited time does not tolerate boiling water Suitable for indoor use or where it is not exposed to water spray.
4. Temporary type Use cold water resistant glue for a limited time. Suitable for temporary use

The current types of TIS plywood that are often seen. In the government sector, it is an internal type of TIS plywood. And external types by TIS plywood that are both bare And covered with natural wood veneer such as natural teak And Italian teak
In addition, each type of TIS plywood is also divided into 4 quality layers according to the characteristics of the thin timber that is made of the front and the back. With the aim of implementing the following applications

Grade 1 is suitable for demanding work Show wood face
Grade 2 is suitable for applications that should not be painted over or Cover the surface of the wood
Grade 3 is suitable for work that needs to be painted or covered on a wooden surface or where the surface cannot be seen
Grade 4 is suitable for working on wooden surfaces. Insignificant
Notes – pine family There is no need to consider eye marks in quality grading.

The quality of the wood in the job specifies that Plywood front and back What is the quality class? Cover the surface of the wood The back of the wood is of grade 4 for work in which the surface of the wood is not important or works that do not show after the wood. By the price of TIS plywood. Each type will depend on the quality of the front and back.
As PTK Wood Co., Ltd. is a plywood manufacturing factory. We can produce TIS plywood of various types and classes of quality. According to customer needs At present, we have been certified for Quality grade plywood from grade 1/1 which is the best grade up to grade 4/4 for jobs requiring lower prices. Does not show the crossbow on both sides.
We also specialize in covering natural tattoo veneer. Or Italian tattoo on TIS plywood for interior work And furniture work

Another factor that makes TIS plywood differ from the general plywood in the market is the “thickness”. TIS plywood has a full mill thickness, for example TIS 10 mm plywood has a thickness of 10 mm. +/- 0.3 mm according to the tolerance criteria specified by TIS, but the general 10 mm plywood in the market usually has a real thickness of only 8-9 mm. TIS plywood is a good choice for the job. That is strict in terms of thickness, export work and construction And decorate the government
Other properties of TIS standard plywood are: piece must be between 7-15%, gluing must meet the requirements by looking at the shear strength. And wood failure according to the table as defined in the standard

TIS plywood marking and labeling, every sheet of veneer must have the following information and marking in details to be easily visible and clearly visible.

1. The word “plywood”
2. Type by expressing the words “external” or “moisture resistant” or “internal” or “temporary”
3. Quality classes are displayed in Arabic numbers. The page numbers show the quality grade of the face. The latter number shows the quality grade of the latter. With a separator / mark such as 1/2
4. Dimensions (width x length x thickness) in millimeters
5. The text or code shows the month, year of work or model made.
6. Name of manufacturer or factory made or registered trademark
7. In case of using a foreign language Must have the same meaning as the Thai language set above

At present, PTK Wood has a wide variety of TIS plywood with standard sizes and thicknesses as follows:

• Standard size: 4 x 8 feet (1220 x2440 mm)
• Standard thickness: 4,6,10,15,20 mm. (If need more thickness, can contact the company To do special production)
• Adhesive: external (waterproof), internal (grade E2, E0, CARB p2 for export)
• All quality classes: from 1/1 – 4/4
• Covering: Bare TIS plywood, TIS plywood covering natural teak, Italian teak and other types of wood veneer. According to customer requirements

For more information about TIS 178-2549 plywood, you can download the specifications from this file.

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