Prestressed bamboo plywood belongs to a new generation of bamboo plywood. It is completely different from the bamboo and bamboo plywood structure. It is glued by bamboo or bamboo string integration method, in order to improve the lateral stiffness and shear resistance, and the integration direction. Prestressing is applied and its structural characteristics are:
1. High strength, high rigidity and good wear resistance. The static bending strength of Phyllostachys pubescens reaches 152Mpa, the flexural modulus of elasticity reaches 12062Mpa, and the hardness is 72Mpa. According to the structural plate under its natural bearing state, it is unmatched by any artificial board.
2. The structure has high fatigue strength and can be reused frequently. In the bending working state, the shear stress is perpendicular to the cemented joint of the bamboo strip, avoiding the shear stress damage, and the shear stress of the bamboo and bamboo boards is consistent with the direction of the stacked seam of the bamboo, and the cemented joint is easily damaged under the shear stress. Peeling and cracking occur, and the number of uses is low;
3. The prestressed bamboo plywood can be sliced. The flatness and thickness difference of the plate are controlled within ±0.5mm of the national standard, while the bamboo and bamboo boards have a thickness difference of ±2mm, which is a kind of steel frame plywood that cannot be used. Achilles heel
4. The surface of the prestressed bamboo strip is smooth and easy to handle, and the cost is low.
Hair care, the literal meaning: to protect the hair. Hair is the most dirty part of the body. Hair care and cleaning are the most important! Hair, like skin, also has oily, neutral and dry types, depending on the amount of sebum film secreted. The number of shampooing should also depend on the individual, as long as it feels unclean, it should be washed. Having shiny and smooth hair is what every woman looks forward to, because soft and shiny hair will give people a bright and healthy feeling. Therefore, people pay more attention to the quality of hair, and hair care is more concerned with the development of fashion trends in the current society.
Hair care is not only related to age, environment, physical condition, occupation, but also should pay attention to the characteristics of the season. In summer, the human sweat glands and sebaceous glands secrete vigorously, and a large amount of sweat and sebum accumulate in the hair, creating good conditions for the growth of bacteria and fungi, so it is very important to keep the hair clean. Than to increase the number of hair washing, to wash once every 1-2 days is the most appropriate, after washing the hair can choose some hair raising agent, strengthen the care of the hair.
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