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In order to make full and reasonable use of forest resources to develop plywood manufacturers in Guangxi and make the best use of wood, according to the use of plywood, plywood is divided into coated plywood for use on furniture, sewing-machine tables and various electrical housings, and for decoration on buildings, furniture, vehicles and ships, generally used plywood is suitable for packaging, liner and other uses and veneer decorative plywood used for construction, furniture, vehicles, ships and other advanced decorative materials, plywood types according to the bond strength is divided into:
Type I NQF -- weather and boiling water resistant plywood.
These plywood are durable, boil-resistant or steam-treated and can be used outdoors.
Class II NS -- water resistant plywood.
It can withstand immersion in cold or short-term hot water, but is not resistant to boiling.
3 Class III NC -- moisture-resistant plywood.
Veneer Veneer Veneer plywood is a kind of artificial board made of Natural Wood Veneer which is sliced or peeled from high quality wood.
2 Decorative Veneer Veneer Veneer plywood features: Plywood
Veneer Veneer Plywood is one of the most commonly used materials for interior decoration. As the product surface decorative veneer is made of high-quality Wood by planing or peeling processing method, so has better decorative performance than plywood. The product is natural and simple, natural and noble, can create an intimate and elegant living environment.
3 types of Veneer veneered plywood:
Decorative veneer veneer plywood according to the decorative surface can be divided into single-sided decorative veneer veneer plywood and double-sided Decorative Veneer Veneer Veneer Plywood; According to water resistance, it can be divided into I decorative veneered plywood, II decorative veneered plywood and III decorative veneered plywood According to decorative veneer texture can be divided into radial decorative veneer veneer plywood and chord decorative veneer plywood. Common is the Veneer Veneer Veneer Veneer Veneer Veneer Veneer Veneer Veneer. Decorative veneer commonly used wood species are birch, Ash, Oak, water Qinggang, ELM, maple, Walnut and so on.
4 classification of VENEERED PLYWOOD FOR DECORATIVE VENEER:
China's decorative veneered plywood standards for decorative veneered plywood into first-class goods, first-class goods and qualified goods grade three. This reminds manufacturers and consumers are not in line with China's decorative veneer veneer plywood standards, such as some manufacturers mark grade "AAA" , which is an enterprise behavior.
5 National Standard on the performance requirements of decorative veneer veneer plywood: our country is the current recommended standard GB / t 15104-94"decorative veneer veneer plywood" , the vast majority of enterprises to implement this standard. The Standard specifies the appearance quality, processing precision and physical and mechanical properties of Veneer Veneer Plywood. Its physical and mechanical properties are: Moisture content, surface bonding strength, dip stripping. GB 18580-2001"indoor decoration materials, wood-based panels and their products in formaldehyde emission limits" also stipulates the product formaldehyde emission limits.
1 The moisture content of veneer veneered plywood is 6% ~ 14% according to the national standard.
2 The surface bonding strength reflects the bonding strength between the veneer layer and the plywood substrate. The National Standard stipulates that the index should be ≥50MPA, and the number of standard test pieces should be ≥80% . If this index is not qualified, the decorative veneer and base material plywood gluing quality is poor, in use may cause decorative veneer layer open glue drum.
The results showed that the adhesive strength of the Veneer Veneer Veneer was higher than that of the Veneer Veneer Veneer. This index is not qualified to explain the poor bonding quality of the plate, in the use of open glue may result.
4 formaldehyde emission limits. This indicator is a compulsory national standard implemented in our country on January 1,2002. It is the "birth permit" for related products. Products that do not meet this standard will not be allowed to be produced from January 1,2002. It is also the "market access permit" for related products, from 1 July 2002, products that do not meet this standard are not allowed to enter the market circulation area. Excessive formaldehyde will affect the health of consumers. According to the standard, the formaldehyde emission of veneered veneer should reach to 1.5 mg / L and 5.0 mg / L respectively.
