High-temperature tape's heat-resistant properties protect substrates during welding due to the synergistic effect of its unique material composition and heat-resistance mechanism. During welding, the arc's high temperature, sparks, and molten metal slag can directly burn, oxidize, or mechanically scratch the substrate surface. High-temperature tape forms a physical barrier, isolating the substrate from the high-temperature environment and blocking any damage at the source. This type of tape is typically made from a high-temperature-resistant material like fiberglass cloth or polyimide, coated with a silicone rubber or acrylic high-temperature adhesive. After a specialized treatment process, it maintains structural stability in temperatures ranging from 200°C to 300°C, or even higher, providing continuous and effective protection for the substrate.
To achieve this heat resistance, the high-temperature tape's base material and adhesive provide a dual guarantee of heat resistance. The high-performance fiber material used in the base material possesses an extremely high melting point and thermal stability. It resists melting, carbonizing, or decomposing under the transient high temperatures generated by welding, maintaining its physical integrity and preventing direct heat transfer to the substrate surface. Furthermore, the adhesive undergoes high-temperature vulcanization or cross-linking, forming a stable molecular network that resists softening and loss in high-temperature environments. This ensures the tape adheres tightly to the substrate surface, preventing the protective layer from detaching due to adhesive failure, and maintaining its barrier properties. This synergistic heat-resistant design of the substrate and adhesive layer allows high-temperature tape to withstand prolonged high-temperature baking and transient high-temperature shocks during welding.
Sparks and slag in welding are significant factors in damaging the substrate surface, and the flame retardancy and impact resistance of high-temperature tape play a key role in this protection. High-quality high-temperature tape typically exhibits excellent flame retardancy, resisting burns when exposed to sparks or slag, and preventing dripping that could cause secondary damage. Furthermore, the high strength of the tape's backing withstands the impact and friction of slag, preventing sharp slag from directly scratching the substrate surface. When sparks from welding strike the tape surface, the tape quickly dissipates the heat and dissipates the energy through its inherent heat resistance, preventing localized high temperatures from breaking through the protective layer. This protects the substrate surface from burn marks and maintains its original flatness and smoothness.
The tight fit of high-temperature tape is also crucial for protecting the substrate, effectively preventing the intrusion of hot gases and impurities. Before welding, the high-temperature tape is tightly adhered to the substrate in the area requiring protection through the adhesive, forming a seamless, sealed protective layer. This tight fit not only prevents direct contact between the hot airflow and the substrate, but also prevents metal dust, oxides, and other impurities generated during welding from adhering to the substrate surface, thus preventing secondary damage during subsequent cleaning. The flexibility of high-temperature tape allows it to adapt to textured or shaped substrate surfaces, ensuring comprehensive protection even for complex areas without leaving any blind spots.
The high-temperature tape continues to provide protection during the cooling phase after welding, reducing oxidation and thermal stress damage. The high surface temperature of the substrate after welding is high, making direct exposure to air susceptible to oxidation and discoloration. The high-temperature tape provides a barrier to air, reducing the likelihood of oxidation. The tape's thermal insulation properties also slow the cooling rate of the substrate, reducing uneven surface shrinkage and stress cracking caused by rapid cooling. This slow cooling protection effectively maintains the substrate's structural stability and surface quality, especially for substrates susceptible to temperature fluctuations, such as metal and glass.
The ease of handling of high-temperature tape also indirectly enhances protective effectiveness, ensuring efficient implementation of protective measures. This type of tape can typically be flexibly cut to fit the substrate size, and the application process is simple and convenient, requiring no complex tools. It can quickly protect large areas and is particularly suitable for quick preparation before welding. Its excellent tear resistance prevents breakage during application, reducing the risk of protection failure due to tape breakage. This ensures the integrity of the protected area, effectively covering all areas of the substrate that require protection, and preventing damage to unprotected areas.
High-temperature tape, through the synergistic effect of its heat-resistant base and adhesive layer, flame retardancy and impact resistance, tight adhesion, and ease of handling, creates a comprehensive protective barrier in welding scenarios. It can effectively block the damage of high temperature, sparks, slag and impurities to the base material, reduce surface damage such as oxidation, burning and scratches, and reduce the impact of temperature difference stress, ultimately achieving comprehensive protection of the base material, ensuring the surface quality and performance stability of the base material after welding, and laying the foundation for the smooth progress of subsequent processes.
