Keywords: Gradient Hot Melt Adhesive; New Energy Transmission With the release of the national New Energy 2035 Plan, infrastructure related to the production, storage and transmission of new energy sources such as solar and wind power will usher in a new upsurge in recent years. Meanwhile, the safety guarantee mechanisms for energy storage and transmission will be continuously improved. Gradient hot melt adhesive changes color continuously with temperature variations, making it the top choice for monitoring the heating status of circuits during the storage and transmission of new energy. Its market demand is enormous. This adhesive is prepared by adding a temperature indicator into SIS. The formulation ratio may vary depending on specific applications and performance requirements. A reference formula is provided below: · SIS thermoplastic elastomer: 30%–40% · Tackifying resin (e.g., C5 petroleum resin, terpene resin, etc.): 40%–50% · Plasticizer (e.g., naphthenic oil, liquid paraffin, etc.): 15%–25% · Temperature indicator (for gradient color effect): Appropriate amount (determined by color change requirements) · Antioxidant / anti-aging agent: 1%–2% (to improve stability and durability of the hot melt adhesive) This is only a general formulation range. Adjustment and optimization are required in actual production based on specific conditions.