& nbsp; & nbsp; We all know that no matter what kind of epoxy resin adhesive, it is impossible to meet all the usage requirements at the same time. This requires correctly determining which properties are the primary and secondary properties of the required adhesive, and then selecting the adhesive according to the principle of ensuring primary properties while considering secondary properties< br />
  & nbsp; & nbsp; The application fields of epoxy adhesives are very wide, and the requirements for the use of epoxy adhesives vary in different fields. Even in the same field, the selection of epoxy adhesives is also different due to factors such as the surrounding environment. How to choose the appropriate epoxy adhesive to achieve twice the result with half the effort?
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  & nbsp; & nbsp; Select adhesive based on the properties of the adhered object

  & nbsp; & nbsp; For brittle materials with high rigidity, such as glass, ceramics, cement, stone, etc., it is advisable to use adhesives with high strength, high hardness and modulus, and not easily deformed. For tough and high-strength rigid materials such as sheet metal and structural components, due to their high load-bearing capacity and peel stress, impact stress, and fatigue stress, it is advisable to use structural adhesives with high strength and toughness, such as epoxy nitrile rubber. Soft and elastic materials, such as plastic film, rubber, etc., generally use epoxy adhesive with high flexibility. Porous materials, such as foamed plastics and sponges, should use epoxy adhesive with high viscosity and good flexibility. Materials with low polarity, such as polyethylene, polypropylene, fluoroplastics, etc., should be surface activated before being bonded with epoxy adhesive< br />


  & nbsp; & nbsp; Select adhesive based on usage temperature

  & nbsp; & nbsp; The glass transition temperature Tg of the adhesive should generally be greater than the maximum operating temperature. The usage temperature of universal epoxy adhesive is about -40~+80 ℃. When the operating temperature is above 150 ℃, heat-resistant adhesives should be selected. When the operating temperature is below -70 ℃, it is advisable to use low temperature resistant adhesives with good toughness, such as epoxy polyurethane adhesive, epoxy nylon adhesive, etc. Cold and hot alternation can cause significant damage to joints, so it is advisable to use high and low temperature resistant adhesives with good toughness, such as epoxy nylon adhesives.
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  & nbsp; & nbsp; Select adhesive based on the properties of the adhesive layer in the joint

  & nbsp; & nbsp; If it is“ Face force”, It is advisable to use adhesives with high cohesive and adhesive strength, as well as good toughness. If it is“ Line force”, It is advisable to use adhesives with good toughness, low modulus, and high elongation at break. When subjected to fatigue or impact loads, it is advisable to use adhesives with good toughness< br />


  & nbsp; & nbsp; Select adhesive according to process requirements

  & nbsp; & nbsp; Such as curing temperature, curing speed, viscosity, moisture or water curing.
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  & nbsp; & nbsp; Select adhesive based on other performance requirements

  & nbsp; & nbsp; Such as water resistance, moisture and heat resistance, aging resistance, corrosion resistance, dielectric properties, etc< br />


  & nbsp; & nbsp; When selecting epoxy adhesive, refer to the above criteria and choose the adhesive correctly to achieve the expected bonding effect.