Products with reliable connection, appearance, reusable, lightweight, easy loading and unloading wooden exemption series of advantages, wooden exemption is widely used in foreign countries, commonly used in the export product packaging. No nail strip is made of advanced multi-layer plywood link galvanized steel by senior fumigation wooden crates. Closeable wooden packaging material carton field assembly or disassembly, inspection-free wooden customers can bring many immediate benefits: First, for the current client used crates, if replaced by steel edge box, then each box can be reduced 5% of the wholesale cost of cartons, according to one million yuan a year to calculate carton packaging costs, annual cost savings for customers can be $ 50,000. In order to try to improve the anisotropic characteristics of natural wood, plywood characteristics make uniform, stable shape, usually plywood in the structure must comply with two basic principles [1]: First symmetry; two adjacent layers of fiber board perpendicular to each other. Symmetry principle is to ask veneer plywood on both sides of the central plane of symmetry, both the nature of the wood, veneer thickness, number of layers, fiber orientation, moisture content, etc., should be symmetrical to each other. In the same piece of plywood, veneer can be used and the thickness of a single species can also be used and the thickness of the veneer of different species; however, any two sides of the central plane of symmetry symmetrical to each other and the thickness of the veneer species to be the same. Face is not the same species allowed back. Carton wholesale, Dongguan City surplus Yi packaging materials Limited (certified), provided by the City Carton Packaging Materials Co., Ltd. surplus benefits. Dongguan Ying Yi Packaging Materials Co., Ltd. (www.dgyybz.com/) is Dongguan, packaging design and processing leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. In Dongguan surplus benefits Packaging Materials Co., Ltd. led the staff warmly welcome all inquiries negotiations to create Dongguan surplus benefits Packaging Materials Co., a better future.