1. Decorative veneer veneer plywood is a man-made board made from natural wooden decorative veneer pasted onto plywood. Decorative veneer is a thin piece of wood made from high-quality wood through planing or rotary cutting.
Characteristics of decorative veneer veneer plywood:
Decorative veneer plywood is one of the most commonly used materials for indoor decoration. Due to the fact that the decorative veneer on the surface of this product is made of high-quality wood through planing or rotary cutting, it has better decorative performance than plywood. This product is naturally simple, natural and noble, and can create an elegant living environment with the best affinity for people.
Types of decorative veneer veneer plywood:
Decorative veneer veneer can be divided into single-sided decorative veneer veneer veneer and double-sided decorative veneer veneer veneer according to the decorative surface; According to its water resistance, it can be divided into Class I decorative veneer veneer plywood, Class II decorative veneer veneer plywood, and Class III decorative veneer veneer plywood; According to the texture of decorative veneer, it can be divided into radial decorative veneer veneer and chord decorative veneer veneer. The common one is single-sided decorative veneer veneer plywood. The commonly used wood types for decorative veneers include birch, ash, oak, Shuiqinggang, elm, maple, walnut, etc.
4. Classification of decorative veneer veneer plywood:
The Chinese standard for decorative veneer veneer plywood stipulates that decorative veneer veneer plywood is divided into three levels: first-class products, first-class products, and qualified products. This reminds manufacturers and consumers that other forms of grading do not comply with the Chinese standard for decorative veneer veneer plywood. For example, some manufacturers have a label level of "AAA", which is a corporate behavior.
The performance requirements of 5 national standards for decorative veneer veneer plywood: The current recommended standard in China is GB/T 15104-2021 "Decorative veneer veneer artificial board", which is implemented by the vast majority of enterprises in production. This standard specifies indicators for decorative veneer veneer plywood in terms of appearance quality, processing accuracy, and physical and mechanical properties. Its physical and mechanical performance indicators include: moisture content, surface bonding strength, and immersion peeling [5]. GB 18580-2017 "Indoor Decoration and Decoration Materials - Formaldehyde Emission Limits in Artificial Panels and Their Products" also stipulates that the formaldehyde emission limit value of this product is 0.124 mg/square meter, with the limit label E1 [7].
① The national standard stipulates that the moisture content index of decorative veneer veneer plywood is 6% -14%.
② The surface bonding strength reflects the bonding strength between the decorative veneer layer and the plywood substrate. The national standard stipulates that this indicator should be ≥ 0.40MPa [5]. If this indicator is not qualified, it indicates that the bonding quality between the decorative veneer and the substrate plywood is poor, which may cause the decorative veneer layer to open and bulge during use.
③ Impregnation peeling reflects the bonding performance of each layer of decorative veneer veneer plywood. If this indicator is not qualified, it indicates that the bonding quality of the board is poor, which may cause adhesive opening during use.
④ Formaldehyde release limit. The requirements for formaldehyde emissions can be found in GB 18580-2017 "Limits for formaldehyde emissions from indoor decorative materials, artificial boards and their products". If classified, the formaldehyde emission should comply with the corresponding level provisions of GB/T 39600-2021 "Classification of Formaldehyde Emission from Wood-based Panels and Their Products".