& nbsp; & nbsp; Polyurethane sealant is widely used in the automotive industry, mainly for sealing car windshields, joint/weld seals, structural seals, interior bonding, floor bonding seals, air conditioning luggage compartment bonding seals, and other bonding seals< br />


  & nbsp; & nbsp; Polyurethane windshield adhesive is an important variety in the automotive assembly process, used for bonding and sealing windshields, side windows, etc., replacing traditional assembly processes and improving the safety factor of the entire vehicle. According to statistics, currently 100% of household car windshields in China are bonded with polyurethane sealant. More and more manufacturers of high-end luxury buses, especially those producing windshields and side windows, are promoting this technology to improve the overall performance of the vehicle. The use rate of polyurethane sealant in windshield bonding in the entire automotive industry can reach 95%.
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  & nbsp; & nbsp; Design requirements for car windshield



  & nbsp; & nbsp; Due to safety considerations, ordinary glass cannot be used for automotive glass, so there are generally only two types of common automotive glass: tempered glass and laminated glass. According to the GB 9656-2003 "Automotive Safety Glass" standard, windshields must have good visibility and sufficient strength to protect drivers and passengers in the event of an accident< br />


  & nbsp; & nbsp; Design requirements for adhesive used in car windshields



  & nbsp; & nbsp; The bonding and sealing of windshield is an important process in the automotive assembly process, and the requirements for adhesive are also very strict. The sealant is required to have high strength, tear resistance, excellent sealing performance, and can improve the overall rigidity of the car body. In addition, it is also required to have excellent weather resistance and durability during use< br />


  & nbsp; & nbsp; The industry standard QC/T 1024-2015 "Single component polyurethane sealant for automobiles" requires that single component polyurethane sealant for automobiles must meet tensile strength when used for bonding; 6.0MPa, and aging performance tests such as heat resistance, moisture and heat resistance, artificial climate accelerated aging (xenon arc lamp), and water resistance must be conducted.
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  & nbsp; & nbsp; Application process of polyurethane sealant



  & nbsp; & nbsp; & ldquo; Three parts materials, seven parts construction;, Good construction is an important guarantee of quality. Before applying glue, it is necessary to conduct an adhesion test between the sealant and the substrate to determine the bonding effect between the sealant and the substrate, select appropriate cleaning agents and primers, etc< br />
  & nbsp; & nbsp;< br />
  & nbsp; & nbsp; Glue application process:< br />


  & nbsp; (1) Surface cleaning: Improve the adhesion between polyurethane sealant and substrate< br />


  & nbsp; & nbsp; Take an appropriate amount of matching cleaning agent and pour it into a clean and dry specialized container. Dip clean degreasing cotton or other materials into the cleaning agent to clean the grease, dust, etc. on the surface of the adhered area, and then dry it thoroughly< br />


  & nbsp; (2) Apply primer: Improve the adhesion between polyurethane sealant and substrate< br />


  & nbsp; & nbsp; Shake the primer thoroughly and pour an appropriate amount into a dedicated container. Use a soft bristled wool brush or other brush to apply a thin layer of primer to the cleaned adhesive area and let it dry thoroughly< br />


  & nbsp; (3) Glue application and installation:< br />


  & nbsp; & nbsp; Glue can be applied in dots or strips as needed. After the sealant is applied, it is necessary to complete the bonding positioning and finishing of the windshield and the vehicle body within the operable time of the sealant.
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  & nbsp; & nbsp; Ruilangda product windshield sealing solution



  & nbsp; & nbsp; Ruilangda Technology has many years of experience in the application of polyurethane sealants in the automotive industry. Ruilangda's single component polyurethane windshield sealing products have the following characteristics: wet curing, easy construction; Good anti sagging performance, no flow during facade construction; Good initial adhesion and high strength; No corrosion or permeation pollution to the substrate; Solvent free, non-toxic and odorless; Excellent anti-aging performance; Good surface coating properties< br />


  & nbsp; & nbsp; Polyurethane sealant is widely used in the entire automotive industry, and the product line of Ruilangda polyurethane sealant is also very complete; In addition to windshield bonding, there are systematic solutions for sealing roof welds, floors, luggage compartments, air conditioning, body skin bonding, external sealing of window glass, and maintenance.