Plastic door frame universal sealing hard strip must resist high temperature deformation, and material selection is the primary key. High polymer materials with excellent high temperature resistance will be selected, such as modified PVC, silicone rubber or EPDM rubber. Modified PVC changes its molecular structure by adding special heat stabilizers and antioxidants, so that it can remain stable in high temperature environments; silicone rubber itself has a wide temperature adaptability range, and even at high temperatures, the flexibility and elasticity of its molecular chain will not be easily lost; EPDM rubber can still maintain good physical properties at high temperatures due to its unique chemical structure, giving the sealing strip the ability to resist high temperatures from the essence of the material.
Formula optimization further enhances the high temperature stability of door frame universal sealing hard strip. Various functional additives are added to the base materials, such as fillers, plasticizers and anti-aging agents. Fillers can enhance the hardness and rigidity of materials, making it difficult for sealing strips to deform due to softening at high temperatures; suitable plasticizers can adjust the flexibility and fluidity of materials, ensuring that they can still maintain moderate elasticity at high temperatures and avoid brittle cracking due to excessive hardness; anti-aging agents can effectively delay the aging rate of materials in high temperature environments, prevent molecular chain breakage, ensure that the sealing strips are in a stable state for a long time, and maintain good anti-deformation ability.
The production process has a profound impact on the high-temperature performance of sealing strips. When using advanced extrusion molding processes, parameters such as temperature, pressure and extrusion speed are strictly controlled. Accurate temperature control ensures that the material is uniformly plasticized in a molten state to avoid local overheating and performance degradation; appropriate pressure can make the material tightly combined to form a dense and uniform internal structure; stable extrusion speed ensures the dimensional accuracy and surface quality of the sealing strip. In addition, special post-processing processes are carried out after molding, such as high-temperature shaping treatment, so that the sealing strips can further stabilize the internal structure in a controlled high-temperature environment and improve their tolerance to high temperatures in actual use.
Structural design also provides assistance in resisting high-temperature deformation. The door frame universal sealing hard strip adopts a reasonable cross-sectional shape and internal structure, such as being designed with ribs or hollow structures. The ribs can increase the overall strength and rigidity of the hard strip, play a supporting role at high temperatures, and prevent the hard strip from collapsing and deforming due to softening; the hollow structure can reduce the heat conduction of the material, reduce the speed of temperature rise inside the hard strip, and reduce the weight, which can alleviate the impact of high temperature on the hard strip to a certain extent, so that the sealing hard strip can still maintain a stable shape in a high temperature environment.
Surface treatment technology is also an important means. A layer of high-temperature resistant protective coating is applied by applying a special coating to the surface of the door frame universal sealing hard strip. This coating can effectively block heat transfer and reduce direct contact between the hard strip surface and the high-temperature environment. At the same time, the coating also has good wear resistance and chemical stability, preventing the hard strip surface from being oxidized or corroded at high temperatures, further protecting the internal materials of the hard strip, maintaining its physical properties, and enhancing the ability of the sealing hard strip to resist high-temperature deformation.
The correct choice of installation method and reasonable construction are also related to the high-temperature performance of the sealing hard strip. During installation, reserve appropriate expansion space, taking into account the thermal expansion of the sealing strip at high temperature, to avoid deformation of the strip due to extrusion caused by insufficient space. And adopt appropriate fixing methods, such as using high-temperature resistant adhesives or fixings, to ensure that the fixed parts will not fail in high temperature environments, so that the sealing strip is always in a stable state, giving full play to its sealing function while reducing deformation caused by improper installation.
Daily maintenance is indispensable in extending the high-temperature service life of door frame universal sealing hard strip. Regularly check the status of the sealing strip, and promptly clean up dust, oil and other impurities attached to the surface, which may accelerate the aging and deformation of the material at high temperatures. Avoid exposing the sealing strip to direct sunlight for a long time, and reduce heat accumulation by installing sunshade devices. Once the sealing strip is found to be slightly deformed or damaged, repair or replace it in time to prevent the problem from getting worse, so that the universal sealing strip of plastic door frames can continue to maintain good performance and shape in high temperature environments.
