The structural adhesive generally uses a thermosetting resin as a binder, a thermoplastic resin or an elastomer as a toughening agent, a curing agent and the like, and some fillers, a solvent, a diluent, a coupling agent, a curing accelerator, and a suppression. Corrosion and anti-oxidation oxidants. The performance of the adhesive depends primarily on the structure, proportion and compatibility of these components.
Engineering/structural adhesives include epoxy glue, polyurethane glue, acrylate glue, anaerobic glue, organic silica gel, etc. The above-mentioned rubber types are mostly reactive types, and can be cured by a chemical reaction at room temperature without using a solvent. At present, there is no consensus on the definition, classification and evaluation criteria of structural adhesives at home and abroad, and the views of various industries are not the same. When classifying and defining structural adhesives and non-structural adhesives, the adhesives used for bonding components that are subjected to strong parts are generally referred to as structural adhesives, and the adhesives used for bonding components that do not need to withstand strong parts are called adhesives. Non-structural adhesive. However, since the same adhesive can be used in strong parts or in non-strength parts, a more rigorous method is to define and classify the properties of the adhesive. American Aerospace Structural Adhesive Standard MMM-A-132 has different heat resistance requirements according to the flight speed of Mach number. The structural adhesives are divided into four types, and shearing, fatigue, creep, aging, T-peeling, etc. The strength indicators have been specified. The flight speed corresponding to type I is less than 1 Mach, and the strength index at room temperature and 82 °C is specified; the type II corresponds to Mach 1 to 2, and the strength index at room temperature and 149 °C is specified; the type III and IV correspond to Mach 2 Above the above 3 Mach, the strength index of room temperature, 149 ° C and 260 ° C is specified. The latter three types are high temperature structural adhesives for supersonic aircraft.
Xinyi Century Building Materials " target=_blank> Building Materials Company Introduction: Beijing Xinyi Century Building Materials "target=_blank> Building Materials Co., Ltd. was established. It is a leading industry of grouting construction materials, integrating research and development grouting, production grouting, sales grouting The high-tech enterprise of material and grouting project contracting is one of the largest manufacturers of special building materials in China. It is one of the manufacturers of building materials (grouting). In 2008, it successfully developed and operated a second in Zhengzhou, Henan. The grouting chain operation company is the subsidiary of Henan Grouting Branch. Therefore, the company owns three companies, namely Beijing Grouting Company, Henan Grouting Company and Shijiazhuang Grouting Company, and operates three entities of Grouting Company and Structural Reinforcement Engineering Department. Among them, more than 20% of the specialists, more than 10 professional and technical personnel, and more than 5 senior engineering and technical personnel.
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